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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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c7f2e85d86
It messes up GST_DEBUG=*:5 make foo/bar.valgrind, because our Makefile looks for '==' as marker of valgrind output.
3922 lines
126 KiB
C
3922 lines
126 KiB
C
/* GStreamer
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* Copyright (C) 2008 Nokia Corporation. All rights reserved.
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* Contact: Stefan Kost <stefan.kost@nokia.com>
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* Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstbaseparse
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* @short_description: Base class for stream parsers
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* @see_also: #GstBaseTransform
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*
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* This base class is for parser elements that process data and splits it
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* into separate audio/video/whatever frames.
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*
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* It provides for:
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* <itemizedlist>
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* <listitem><para>provides one sink pad and one source pad</para></listitem>
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* <listitem><para>handles state changes</para></listitem>
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* <listitem><para>can operate in pull mode or push mode</para></listitem>
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* <listitem><para>handles seeking in both modes</para></listitem>
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* <listitem><para>handles events (NEWSEGMENT/EOS/FLUSH)</para></listitem>
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* <listitem><para>
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* handles queries (POSITION/DURATION/SEEKING/FORMAT/CONVERT)
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* </para></listitem>
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* <listitem><para>handles flushing</para></listitem>
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* </itemizedlist>
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*
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* The purpose of this base class is to provide the basic functionality of
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* a parser and share a lot of rather complex code.
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*
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* Description of the parsing mechanism:
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* <orderedlist>
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* <listitem>
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* <itemizedlist><title>Set-up phase</title>
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* <listitem><para>
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* GstBaseParse class calls @set_sink_caps to inform the subclass about
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* incoming sinkpad caps. Subclass should set the srcpad caps accordingly.
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* </para></listitem>
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* <listitem><para>
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* GstBaseParse calls @start to inform subclass that data processing is
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* about to start now.
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* </para></listitem>
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* <listitem><para>
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* At least at this point subclass needs to tell the GstBaseParse class
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* how big data chunks it wants to receive (min_frame_size). It can do
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* this with gst_base_parse_set_min_frame_size().
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* </para></listitem>
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* <listitem><para>
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* GstBaseParse class sets up appropriate data passing mode (pull/push)
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* and starts to process the data.
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* </para></listitem>
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* </itemizedlist>
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* </listitem>
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* <listitem>
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* <itemizedlist>
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* <title>Parsing phase</title>
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* <listitem><para>
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* GstBaseParse gathers at least min_frame_size bytes of data either
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* by pulling it from upstream or collecting buffers in an internal
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* #GstAdapter.
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* </para></listitem>
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* <listitem><para>
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* A buffer of (at least) min_frame_size bytes is passed to subclass with
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* @check_valid_frame. Subclass checks the contents and returns TRUE
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* if the buffer contains a valid frame. It also needs to set the
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* @framesize according to the detected frame size. If buffer didn't
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* contain a valid frame, this call must return FALSE and optionally
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* set the @skipsize value to inform base class that how many bytes
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* it needs to skip in order to find a valid frame. @framesize can always
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* indicate a new minimum for current frame parsing. Indicating G_MAXUINT
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* for requested amount means subclass simply needs best available
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* subsequent data. In push mode this amounts to an additional input buffer
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* (thus minimal additional latency), in pull mode this amounts to some
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* arbitrary reasonable buffer size increase. The passed buffer
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* is read-only. Note that @check_valid_frame might receive any small
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* amount of input data when leftover data is being drained (e.g. at EOS).
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* </para></listitem>
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* <listitem><para>
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* After valid frame is found, it will be passed again to subclass with
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* @parse_frame call. Now subclass is responsible for parsing the
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* frame contents and setting the caps, and buffer metadata (e.g.
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* buffer timestamp and duration, or keyframe if applicable).
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* (although the latter can also be done by GstBaseParse if it is
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* appropriately configured, see below). Frame is provided with
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* timestamp derived from upstream (as much as generally possible),
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* duration obtained from configuration (see below), and offset
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* if meaningful (in pull mode).
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* </para></listitem>
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* <listitem><para>
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* Finally the buffer can be pushed downstream and the parsing loop starts
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* over again. Just prior to actually pushing the buffer in question,
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* it is passed to @pre_push_buffer which gives subclass yet one
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* last chance to examine buffer metadata, or to send some custom (tag)
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* events, or to perform custom (segment) filtering.
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* </para></listitem>
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* <listitem><para>
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* During the parsing process GstBaseParseClass will handle both srcpad
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* and sinkpad events. They will be passed to subclass if @event or
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* @src_event callbacks have been provided.
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* </para></listitem>
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* </itemizedlist>
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* </listitem>
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* <listitem>
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* <itemizedlist><title>Shutdown phase</title>
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* <listitem><para>
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* GstBaseParse class calls @stop to inform the subclass that data
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* parsing will be stopped.
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* </para></listitem>
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* </itemizedlist>
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* </listitem>
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* </orderedlist>
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*
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* Subclass is responsible for providing pad template caps for
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* source and sink pads. The pads need to be named "sink" and "src". It also
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* needs to set the fixed caps on srcpad, when the format is ensured (e.g.
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* when base class calls subclass' @set_sink_caps function).
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*
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* This base class uses #GST_FORMAT_DEFAULT as a meaning of frames. So,
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* subclass conversion routine needs to know that conversion from
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* #GST_FORMAT_TIME to #GST_FORMAT_DEFAULT must return the
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* frame number that can be found from the given byte position.
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*
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* GstBaseParse uses subclasses conversion methods also for seeking (or
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* otherwise uses its own default one, see also below).
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*
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* Subclass @start and @stop functions will be called to inform the beginning
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* and end of data processing.
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*
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* Things that subclass need to take care of:
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* <itemizedlist>
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* <listitem><para>Provide pad templates</para></listitem>
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* <listitem><para>
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* Fixate the source pad caps when appropriate
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* </para></listitem>
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* <listitem><para>
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* Inform base class how big data chunks should be retrieved. This is
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* done with gst_base_parse_set_min_frame_size() function.
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* </para></listitem>
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* <listitem><para>
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* Examine data chunks passed to subclass with @check_valid_frame
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* and tell if they contain a valid frame
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* </para></listitem>
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* <listitem><para>
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* Set the caps and timestamp to frame that is passed to subclass with
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* @parse_frame function.
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* </para></listitem>
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* <listitem><para>Provide conversion functions</para></listitem>
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* <listitem><para>
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* Update the duration information with gst_base_parse_set_duration()
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* </para></listitem>
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* <listitem><para>
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* Optionally passthrough using gst_base_parse_set_passthrough()
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* </para></listitem>
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* <listitem><para>
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* Configure various baseparse parameters using
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* gst_base_parse_set_average_bitrate(), gst_base_parse_set_syncable()
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* and gst_base_parse_set_frame_rate().
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* </para></listitem>
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* <listitem><para>
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* In particular, if subclass is unable to determine a duration, but
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* parsing (or specs) yields a frames per seconds rate, then this can be
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* provided to GstBaseParse to enable it to cater for
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* buffer time metadata (which will be taken from upstream as much as
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* possible). Internally keeping track of frame durations and respective
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* sizes that have been pushed provides GstBaseParse with an estimated
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* bitrate. A default @convert (used if not overriden) will then use these
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* rates to perform obvious conversions. These rates are also used to
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* update (estimated) duration at regular frame intervals.
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* </para></listitem>
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* </itemizedlist>
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*
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*/
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/* TODO:
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* - In push mode provide a queue of adapter-"queued" buffers for upstream
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* buffer metadata
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* - Queue buffers/events until caps are set
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <gst/base/gstadapter.h>
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#include "gstbaseparse.h"
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#define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
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#define MIN_FRAMES_TO_POST_BITRATE 10
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#define TARGET_DIFFERENCE (20 * GST_SECOND)
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GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
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#define GST_CAT_DEFAULT gst_base_parse_debug
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/* Supported formats */
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static const GstFormat fmtlist[] = {
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GST_FORMAT_DEFAULT,
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GST_FORMAT_BYTES,
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GST_FORMAT_TIME,
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0
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};
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#define GST_BASE_PARSE_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
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struct _GstBaseParsePrivate
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{
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GstActivateMode pad_mode;
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GstAdapter *adapter;
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gint64 duration;
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GstFormat duration_fmt;
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gint64 estimated_duration;
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guint min_frame_size;
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gboolean passthrough;
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gboolean syncable;
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gboolean has_timing_info;
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guint fps_num, fps_den;
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gint update_interval;
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guint bitrate;
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guint lead_in, lead_out;
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GstClockTime lead_in_ts, lead_out_ts;
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GstClockTime min_latency, max_latency;
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gboolean discont;
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gboolean flushing;
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gboolean drain;
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gint64 offset;
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gint64 sync_offset;
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GstClockTime next_ts;
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GstClockTime prev_ts;
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GstClockTime frame_duration;
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gboolean seen_keyframe;
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gboolean is_video;
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guint64 framecount;
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guint64 bytecount;
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guint64 data_bytecount;
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guint64 acc_duration;
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GstClockTime first_frame_ts;
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gint64 first_frame_offset;
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gboolean post_min_bitrate;
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gboolean post_avg_bitrate;
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gboolean post_max_bitrate;
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guint min_bitrate;
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guint avg_bitrate;
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guint max_bitrate;
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guint posted_avg_bitrate;
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GList *pending_events;
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/* frames/buffers that are queued and ready to go on OK */
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GQueue queued_frames;
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GstBuffer *cache;
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/* index entry storage, either ours or provided */
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GstIndex *index;
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gint index_id;
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gboolean own_index;
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GStaticMutex index_lock;
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/* seek table entries only maintained if upstream is BYTE seekable */
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gboolean upstream_seekable;
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gboolean upstream_has_duration;
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gint64 upstream_size;
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/* minimum distance between two index entries */
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GstClockTimeDiff idx_interval;
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/* ts and offset of last entry added */
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GstClockTime index_last_ts;
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gint64 index_last_offset;
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gboolean index_last_valid;
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/* timestamps currently produced are accurate, e.g. started from 0 onwards */
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gboolean exact_position;
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/* seek events are temporarily kept to match them with newsegments */
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GSList *pending_seeks;
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/* reverse playback */
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GSList *buffers_pending;
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GSList *buffers_queued;
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GSList *buffers_send;
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GstClockTime last_ts;
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gint64 last_offset;
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/* Newsegment event to be sent after SEEK */
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GstEvent *pending_segment;
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/* Segment event that closes the running segment prior to SEEK */
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GstEvent *close_segment;
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/* push mode helper frame */
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GstBaseParseFrame frame;
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};
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typedef struct _GstBaseParseSeek
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{
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GstSegment segment;
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gboolean accurate;
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gint64 offset;
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GstClockTime start_ts;
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} GstBaseParseSeek;
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static GstElementClass *parent_class = NULL;
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static void gst_base_parse_class_init (GstBaseParseClass * klass);
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static void gst_base_parse_init (GstBaseParse * parse,
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GstBaseParseClass * klass);
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GType
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gst_base_parse_get_type (void)
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{
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static volatile gsize base_parse_type = 0;
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if (g_once_init_enter (&base_parse_type)) {
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static const GTypeInfo base_parse_info = {
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sizeof (GstBaseParseClass),
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(GBaseInitFunc) NULL,
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(GBaseFinalizeFunc) NULL,
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(GClassInitFunc) gst_base_parse_class_init,
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NULL,
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NULL,
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sizeof (GstBaseParse),
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0,
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(GInstanceInitFunc) gst_base_parse_init,
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};
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GType _type;
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_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
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g_once_init_leave (&base_parse_type, _type);
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}
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return (GType) base_parse_type;
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}
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static void gst_base_parse_finalize (GObject * object);
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static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
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GstStateChange transition);
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static void gst_base_parse_reset (GstBaseParse * parse);
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static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
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static GstIndex *gst_base_parse_get_index (GstElement * element);
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static gboolean gst_base_parse_sink_activate (GstPad * sinkpad);
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static gboolean gst_base_parse_sink_activate_push (GstPad * pad,
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gboolean active);
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static gboolean gst_base_parse_sink_activate_pull (GstPad * pad,
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gboolean active);
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static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
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GstEvent * event);
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static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
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static gboolean gst_base_parse_src_event (GstPad * pad, GstEvent * event);
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static gboolean gst_base_parse_sink_event (GstPad * pad, GstEvent * event);
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static gboolean gst_base_parse_query (GstPad * pad, GstQuery * query);
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static gboolean gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps);
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static const GstQueryType *gst_base_parse_get_querytypes (GstPad * pad);
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static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstBuffer * buffer);
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static void gst_base_parse_loop (GstPad * pad);
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static gboolean gst_base_parse_check_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
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static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame);
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static gboolean gst_base_parse_sink_eventfunc (GstBaseParse * parse,
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GstEvent * event);
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static gboolean gst_base_parse_src_eventfunc (GstBaseParse * parse,
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GstEvent * event);
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static void gst_base_parse_drain (GstBaseParse * parse);
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static void gst_base_parse_post_bitrates (GstBaseParse * parse,
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gboolean post_min, gboolean post_avg, gboolean post_max);
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static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
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GstClockTime time, gboolean before, GstClockTime * _ts);
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static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
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GstClockTime * _time, gint64 * _offset);
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static GstFlowReturn gst_base_parse_process_fragment (GstBaseParse * parse,
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gboolean push_only);
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static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
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static void
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gst_base_parse_clear_queues (GstBaseParse * parse)
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{
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g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
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g_slist_free (parse->priv->buffers_queued);
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parse->priv->buffers_queued = NULL;
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g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
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NULL);
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g_slist_free (parse->priv->buffers_pending);
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parse->priv->buffers_pending = NULL;
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g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
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g_slist_free (parse->priv->buffers_send);
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parse->priv->buffers_send = NULL;
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}
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static void
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gst_base_parse_finalize (GObject * object)
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{
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GstBaseParse *parse = GST_BASE_PARSE (object);
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GstEvent **p_ev;
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g_object_unref (parse->priv->adapter);
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if (parse->priv->pending_segment) {
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p_ev = &parse->priv->pending_segment;
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gst_event_replace (p_ev, NULL);
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}
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if (parse->priv->close_segment) {
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p_ev = &parse->priv->close_segment;
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gst_event_replace (p_ev, NULL);
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}
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if (parse->priv->cache) {
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gst_buffer_unref (parse->priv->cache);
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parse->priv->cache = NULL;
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}
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g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
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NULL);
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g_list_free (parse->priv->pending_events);
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parse->priv->pending_events = NULL;
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g_queue_foreach (&parse->priv->queued_frames,
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(GFunc) gst_base_parse_frame_free, NULL);
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g_queue_clear (&parse->priv->queued_frames);
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if (parse->priv->index) {
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gst_object_unref (parse->priv->index);
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parse->priv->index = NULL;
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}
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g_static_mutex_free (&parse->priv->index_lock);
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gst_base_parse_clear_queues (parse);
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|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_base_parse_class_init (GstBaseParseClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
|
|
gobject_class = G_OBJECT_CLASS (klass);
|
|
g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
|
|
|
|
gstelement_class = (GstElementClass *) klass;
|
|
gstelement_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
|
|
gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
|
|
gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
|
|
|
|
/* Default handlers */
|
|
klass->check_valid_frame = gst_base_parse_check_frame;
|
|
klass->parse_frame = gst_base_parse_parse_frame;
|
|
klass->src_event = gst_base_parse_src_eventfunc;
|
|
klass->convert = gst_base_parse_convert_default;
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
|
|
"baseparse element");
|
|
}
|
|
|
|
static void
|
|
gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
|
|
{
|
|
GstPadTemplate *pad_template;
|
|
|
|
GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
|
|
|
|
parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
|
|
|
|
pad_template =
|
|
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
|
|
g_return_if_fail (pad_template != NULL);
|
|
parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
|
|
gst_pad_set_event_function (parse->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
|
|
gst_pad_set_setcaps_function (parse->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_sink_setcaps));
|
|
gst_pad_set_chain_function (parse->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_chain));
|
|
gst_pad_set_activate_function (parse->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
|
|
gst_pad_set_activatepush_function (parse->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_push));
|
|
gst_pad_set_activatepull_function (parse->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_pull));
|
|
gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
|
|
|
|
GST_DEBUG_OBJECT (parse, "sinkpad created");
|
|
|
|
pad_template =
|
|
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
|
|
g_return_if_fail (pad_template != NULL);
|
|
parse->srcpad = gst_pad_new_from_template (pad_template, "src");
|
|
gst_pad_set_event_function (parse->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
|
|
gst_pad_set_query_type_function (parse->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_get_querytypes));
|
|
gst_pad_set_query_function (parse->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_parse_query));
|
|
gst_pad_use_fixed_caps (parse->srcpad);
|
|
gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
|
|
GST_DEBUG_OBJECT (parse, "src created");
|
|
|
|
g_queue_init (&parse->priv->queued_frames);
|
|
|
|
parse->priv->adapter = gst_adapter_new ();
|
|
|
|
parse->priv->pad_mode = GST_ACTIVATE_NONE;
|
|
|
|
g_static_mutex_init (&parse->priv->index_lock);
|
|
|
|
/* init state */
|
|
gst_base_parse_reset (parse);
|
|
GST_DEBUG_OBJECT (parse, "init ok");
|
|
}
|
|
|
|
static GstBaseParseFrame *
|
|
gst_base_parse_frame_copy (GstBaseParseFrame * frame)
|
|
{
|
|
GstBaseParseFrame *copy;
|
|
|
|
copy = g_slice_dup (GstBaseParseFrame, frame);
|
|
copy->buffer = gst_buffer_ref (frame->buffer);
|
|
copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
|
|
|
|
GST_TRACE ("copied frame %p -> %p", frame, copy);
|
|
|
|
return copy;
|
|
}
|
|
|
|
void
|
|
gst_base_parse_frame_free (GstBaseParseFrame * frame)
|
|
{
|
|
GST_TRACE ("freeing frame %p", frame);
|
|
|
|
if (frame->buffer) {
|
|
gst_buffer_unref (frame->buffer);
|
|
frame->buffer = NULL;
|
|
}
|
|
|
|
if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
|
|
g_slice_free (GstBaseParseFrame, frame);
|
|
} else {
|
|
memset (frame, 0, sizeof (*frame));
|
|
}
|
|
}
|
|
|
|
GType
|
|
gst_base_parse_frame_get_type (void)
|
|
{
|
|
static volatile gsize frame_type = 0;
|
|
|
|
if (g_once_init_enter (&frame_type)) {
|
|
GType _type;
|
|
|
|
_type = g_boxed_type_register_static ("GstBaseParseFrame",
|
|
(GBoxedCopyFunc) gst_base_parse_frame_copy,
|
|
(GBoxedFreeFunc) gst_base_parse_frame_free);
|
|
g_once_init_leave (&frame_type, _type);
|
|
}
|
|
return (GType) frame_type;
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_frame_init:
|
|
* @frame: #GstBaseParseFrame.
|
|
*
|
|
* Sets a #GstBaseParseFrame to initial state. Currently this means
|
|
* all public fields are zero-ed and a private flag is set to make
|
|
* sure gst_base_parse_frame_free() only frees the contents but not
|
|
* the actual frame. Use this function to initialise a #GstBaseParseFrame
|
|
* allocated on the stack.
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
void
|
|
gst_base_parse_frame_init (GstBaseParseFrame * frame)
|
|
{
|
|
memset (frame, 0, sizeof (GstBaseParseFrame));
|
|
frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
|
|
GST_TRACE ("inited frame %p", frame);
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_frame_new:
|
|
* @buffer: (transfer none): a #GstBuffer
|
|
* @flags: the flags
|
|
* @overhead: number of bytes in this frame which should be counted as
|
|
* metadata overhead, ie. not used to calculate the average bitrate.
|
|
* Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
|
|
*
|
|
* Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
|
|
* elements written in C should usually allocate the frame on the stack and
|
|
* then use gst_base_parse_frame_init() to initialise it.
|
|
*
|
|
* Returns: a newly-allocated #GstBaseParseFrame. Free with
|
|
* gst_base_parse_frame_free() when no longer needed, unless you gave
|
|
* away ownership to gst_base_parse_push_frame().
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
GstBaseParseFrame *
|
|
gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
|
|
gint overhead)
|
|
{
|
|
GstBaseParseFrame *frame;
|
|
|
|
frame = g_slice_new0 (GstBaseParseFrame);
|
|
frame->buffer = gst_buffer_ref (buffer);
|
|
|
|
GST_TRACE ("created frame %p", frame);
|
|
return frame;
|
|
}
|
|
|
|
static inline void
|
|
gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
|
|
GstBuffer * buf)
|
|
{
|
|
gst_buffer_replace (&frame->buffer, buf);
|
|
|
|
parse->flags = 0;
|
|
|
|
/* set flags one by one for clarity */
|
|
if (G_UNLIKELY (parse->priv->drain))
|
|
parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
|
|
|
|
/* losing sync is pretty much a discont (and vice versa), no ? */
|
|
if (G_UNLIKELY (parse->priv->discont))
|
|
parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
|
|
}
|
|
|
|
static void
|
|
gst_base_parse_reset (GstBaseParse * parse)
|
|
{
|
|
GST_OBJECT_LOCK (parse);
|
|
gst_segment_init (&parse->segment, GST_FORMAT_TIME);
|
|
parse->priv->duration = -1;
|
|
parse->priv->min_frame_size = 1;
|
|
parse->priv->discont = TRUE;
|
|
parse->priv->flushing = FALSE;
|
|
parse->priv->offset = 0;
|
|
parse->priv->sync_offset = 0;
|
|
parse->priv->update_interval = -1;
|
|
parse->priv->fps_num = parse->priv->fps_den = 0;
|
|
parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
|
|
parse->priv->lead_in = parse->priv->lead_out = 0;
|
|
parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
|
|
parse->priv->bitrate = 0;
|
|
parse->priv->framecount = 0;
|
|
parse->priv->bytecount = 0;
|
|
parse->priv->acc_duration = 0;
|
|
parse->priv->first_frame_ts = GST_CLOCK_TIME_NONE;
|
|
parse->priv->first_frame_offset = -1;
|
|
parse->priv->estimated_duration = -1;
|
|
parse->priv->next_ts = 0;
|
|
parse->priv->syncable = TRUE;
|
|
parse->priv->passthrough = FALSE;
|
|
parse->priv->has_timing_info = FALSE;
|
|
parse->priv->post_min_bitrate = TRUE;
|
|
parse->priv->post_avg_bitrate = TRUE;
|
|
parse->priv->post_max_bitrate = TRUE;
|
|
parse->priv->min_bitrate = G_MAXUINT;
|
|
parse->priv->max_bitrate = 0;
|
|
parse->priv->avg_bitrate = 0;
|
|
parse->priv->posted_avg_bitrate = 0;
|
|
|
|
parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
|
|
parse->priv->index_last_offset = -1;
|
|
parse->priv->index_last_valid = TRUE;
|
|
parse->priv->upstream_seekable = FALSE;
|
|
parse->priv->upstream_size = 0;
|
|
parse->priv->upstream_has_duration = FALSE;
|
|
parse->priv->idx_interval = 0;
|
|
parse->priv->exact_position = TRUE;
|
|
parse->priv->seen_keyframe = FALSE;
|
|
|
|
parse->priv->last_ts = GST_CLOCK_TIME_NONE;
|
|
parse->priv->last_offset = 0;
|
|
|
|
if (parse->priv->pending_segment) {
|
|
gst_event_unref (parse->priv->pending_segment);
|
|
parse->priv->pending_segment = NULL;
|
|
}
|
|
|
|
g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
|
|
NULL);
|
|
g_list_free (parse->priv->pending_events);
|
|
parse->priv->pending_events = NULL;
|
|
|
|
if (parse->priv->cache) {
|
|
gst_buffer_unref (parse->priv->cache);
|
|
parse->priv->cache = NULL;
|
|
}
|
|
|
|
g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
|
|
g_slist_free (parse->priv->pending_seeks);
|
|
parse->priv->pending_seeks = NULL;
|
|
|
|
/* we know it is not alloc'ed, but maybe other stuff to free, some day ... */
|
|
parse->priv->frame._private_flags |=
|
|
GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
|
|
gst_base_parse_frame_free (&parse->priv->frame);
|
|
GST_OBJECT_UNLOCK (parse);
|
|
}
|
|
|
|
/* gst_base_parse_check_frame:
|
|
* @parse: #GstBaseParse.
|
|
* @buffer: GstBuffer.
|
|
* @framesize: This will be set to tell the found frame size in bytes.
|
|
* @skipsize: Output parameter that tells how much data needs to be skipped
|
|
* in order to find the following frame header.
|
|
*
|
|
* Default callback for check_valid_frame.
|
|
*
|
|
* Returns: Always TRUE.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_check_frame (GstBaseParse * parse,
|
|
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
|
|
{
|
|
*framesize = GST_BUFFER_SIZE (frame->buffer);
|
|
*skipsize = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* gst_base_parse_parse_frame:
|
|
* @parse: #GstBaseParse.
|
|
* @buffer: #GstBuffer.
|
|
*
|
|
* Default callback for parse_frame.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
|
|
{
|
|
GstBuffer *buffer = frame->buffer;
|
|
|
|
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
|
|
GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
|
|
GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
|
|
}
|
|
if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
|
|
GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
|
|
GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
|
|
}
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* gst_base_parse_convert:
|
|
* @parse: #GstBaseParse.
|
|
* @src_format: #GstFormat describing the source format.
|
|
* @src_value: Source value to be converted.
|
|
* @dest_format: #GstFormat defining the converted format.
|
|
* @dest_value: Pointer where the conversion result will be put.
|
|
*
|
|
* Converts using configured "convert" vmethod in #GstBaseParse class.
|
|
*
|
|
* Returns: TRUE if conversion was successful.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_convert (GstBaseParse * parse,
|
|
GstFormat src_format,
|
|
gint64 src_value, GstFormat dest_format, gint64 * dest_value)
|
|
{
|
|
GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
gboolean ret;
|
|
|
|
g_return_val_if_fail (dest_value != NULL, FALSE);
|
|
|
|
if (!klass->convert)
|
|
return FALSE;
|
|
|
|
ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
|
|
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
{
|
|
if (ret) {
|
|
if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
|
|
GST_LOG_OBJECT (parse,
|
|
"TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
|
|
GST_TIME_ARGS (src_value), *dest_value);
|
|
} else if (dest_format == GST_FORMAT_TIME &&
|
|
src_format == GST_FORMAT_BYTES) {
|
|
GST_LOG_OBJECT (parse,
|
|
"BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
|
|
src_value, GST_TIME_ARGS (*dest_value));
|
|
} else {
|
|
GST_LOG_OBJECT (parse,
|
|
"%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
|
|
GST_STR_NULL (gst_format_get_name (src_format)),
|
|
GST_STR_NULL (gst_format_get_name (dest_format)),
|
|
src_value, *dest_value);
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (parse, "conversion failed");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* gst_base_parse_sink_event:
|
|
* @pad: #GstPad that received the event.
|
|
* @event: #GstEvent to be handled.
|
|
*
|
|
* Handler for sink pad events.
|
|
*
|
|
* Returns: TRUE if the event was handled.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_sink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstBaseParse *parse;
|
|
GstBaseParseClass *bclass;
|
|
gboolean handled = FALSE;
|
|
gboolean ret = TRUE;
|
|
|
|
parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
|
|
bclass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
|
|
GST_EVENT_TYPE_NAME (event));
|
|
|
|
/* Cache all events except EOS, NEWSEGMENT and FLUSH_STOP if we have a
|
|
* pending segment */
|
|
if (parse->priv->pending_segment && GST_EVENT_TYPE (event) != GST_EVENT_EOS
|
|
&& GST_EVENT_TYPE (event) != GST_EVENT_NEWSEGMENT
|
|
&& GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_START
|
|
&& GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
|
|
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_TAG)
|
|
/* See if any bitrate tags were posted */
|
|
gst_base_parse_handle_tag (parse, event);
|
|
|
|
parse->priv->pending_events =
|
|
g_list_append (parse->priv->pending_events, event);
|
|
ret = TRUE;
|
|
} else {
|
|
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
|
|
parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
|
|
/* We've not posted bitrate tags yet - do so now */
|
|
gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
|
|
|
|
if (bclass->event)
|
|
handled = bclass->event (parse, event);
|
|
|
|
if (!handled)
|
|
handled = gst_base_parse_sink_eventfunc (parse, event);
|
|
|
|
if (!handled)
|
|
ret = gst_pad_event_default (pad, event);
|
|
}
|
|
|
|
gst_object_unref (parse);
|
|
GST_DEBUG_OBJECT (parse, "event handled");
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* gst_base_parse_sink_eventfunc:
|
|
* @parse: #GstBaseParse.
|
|
* @event: #GstEvent to be handled.
|
|
*
|
|
* Element-level event handler function.
|
|
*
|
|
* The event will be unreffed only if it has been handled and this
|
|
* function returns %TRUE
|
|
*
|
|
* Returns: %TRUE if the event was handled and not need forwarding.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
|
|
{
|
|
gboolean handled = FALSE;
|
|
GstEvent **eventp;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
gdouble rate, applied_rate;
|
|
GstFormat format;
|
|
gint64 start, stop, pos, next_ts, offset = 0;
|
|
gboolean update;
|
|
|
|
gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
|
|
&format, &start, &stop, &pos);
|
|
|
|
GST_DEBUG_OBJECT (parse, "newseg rate %g, applied rate %g, "
|
|
"format %d, start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
|
|
", pos = %" GST_TIME_FORMAT, rate, applied_rate, format,
|
|
GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos));
|
|
|
|
if (format == GST_FORMAT_BYTES) {
|
|
GstClockTime seg_start, seg_stop;
|
|
GstBaseParseSeek *seek = NULL;
|
|
GSList *node;
|
|
|
|
/* stop time is allowed to be open-ended, but not start & pos */
|
|
seg_stop = GST_CLOCK_TIME_NONE;
|
|
seg_start = 0;
|
|
offset = pos;
|
|
|
|
GST_OBJECT_LOCK (parse);
|
|
for (node = parse->priv->pending_seeks; node; node = node->next) {
|
|
GstBaseParseSeek *tmp = node->data;
|
|
|
|
if (tmp->offset == pos) {
|
|
seek = tmp;
|
|
break;
|
|
}
|
|
}
|
|
parse->priv->pending_seeks =
|
|
g_slist_remove (parse->priv->pending_seeks, seek);
|
|
GST_OBJECT_UNLOCK (parse);
|
|
|
|
if (seek) {
|
|
GST_DEBUG_OBJECT (parse,
|
|
"Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
|
|
seek->accurate ? " accurate" : "", &seek->segment);
|
|
seg_start = seek->segment.start;
|
|
seg_stop = seek->segment.stop;
|
|
next_ts = seek->start_ts;
|
|
parse->priv->exact_position = seek->accurate;
|
|
g_free (seek);
|
|
} else {
|
|
/* best attempt convert */
|
|
/* as these are only estimates, stop is kept open-ended to avoid
|
|
* premature cutting */
|
|
gst_base_parse_convert (parse, GST_FORMAT_BYTES, start,
|
|
GST_FORMAT_TIME, (gint64 *) & seg_start);
|
|
parse->priv->exact_position = (start == 0);
|
|
next_ts = seg_start;
|
|
}
|
|
|
|
gst_event_unref (event);
|
|
event = gst_event_new_new_segment_full (update, rate, applied_rate,
|
|
GST_FORMAT_TIME, seg_start, seg_stop, seg_start);
|
|
format = GST_FORMAT_TIME;
|
|
start = seg_start;
|
|
stop = seg_stop;
|
|
GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. "
|
|
"start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (seg_start), GST_TIME_ARGS (seg_stop));
|
|
} else if (format != GST_FORMAT_TIME) {
|
|
/* Unknown incoming segment format. Output a default open-ended
|
|
* TIME segment */
|
|
gst_event_unref (event);
|
|
event = gst_event_new_new_segment_full (update, rate, applied_rate,
|
|
GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0);
|
|
format = GST_FORMAT_TIME;
|
|
next_ts = start = 0;
|
|
stop = GST_CLOCK_TIME_NONE;
|
|
} else {
|
|
/* not considered BYTE seekable if it is talking to us in TIME,
|
|
* whatever else it might claim */
|
|
parse->priv->upstream_seekable = FALSE;
|
|
next_ts = start;
|
|
}
|
|
|
|
gst_segment_set_newsegment_full (&parse->segment, update, rate,
|
|
applied_rate, format, start, stop, start);
|
|
|
|
/* save the segment for later, right before we push a new buffer so that
|
|
* the caps are fixed and the next linked element can receive
|
|
* the segment. */
|
|
eventp = &parse->priv->pending_segment;
|
|
gst_event_replace (eventp, event);
|
|
gst_event_unref (event);
|
|
handled = TRUE;
|
|
|
|
/* but finish the current segment */
|
|
GST_DEBUG_OBJECT (parse, "draining current segment");
|
|
if (parse->segment.rate > 0.0)
|
|
gst_base_parse_drain (parse);
|
|
else
|
|
gst_base_parse_process_fragment (parse, FALSE);
|
|
gst_adapter_clear (parse->priv->adapter);
|
|
parse->priv->offset = offset;
|
|
parse->priv->sync_offset = offset;
|
|
parse->priv->next_ts = next_ts;
|
|
parse->priv->last_ts = GST_CLOCK_TIME_NONE;
|
|
parse->priv->discont = TRUE;
|
|
parse->priv->seen_keyframe = FALSE;
|
|
break;
|
|
}
|
|
|
|
case GST_EVENT_FLUSH_START:
|
|
parse->priv->flushing = TRUE;
|
|
handled = gst_pad_push_event (parse->srcpad, gst_event_ref (event));
|
|
if (handled)
|
|
gst_event_unref (event);
|
|
/* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
|
|
GST_PAD_STREAM_LOCK (parse->srcpad);
|
|
GST_PAD_STREAM_UNLOCK (parse->srcpad);
|
|
|
|
break;
|
|
|
|
case GST_EVENT_FLUSH_STOP:
|
|
gst_adapter_clear (parse->priv->adapter);
|
|
gst_base_parse_clear_queues (parse);
|
|
parse->priv->flushing = FALSE;
|
|
parse->priv->discont = TRUE;
|
|
parse->priv->last_ts = GST_CLOCK_TIME_NONE;
|
|
parse->priv->frame._private_flags |=
|
|
GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
|
|
gst_base_parse_frame_free (&parse->priv->frame);
|
|
break;
|
|
|
|
case GST_EVENT_EOS:
|
|
if (parse->segment.rate > 0.0)
|
|
gst_base_parse_drain (parse);
|
|
else
|
|
gst_base_parse_process_fragment (parse, FALSE);
|
|
|
|
/* If we STILL have zero frames processed, fire an error */
|
|
if (parse->priv->framecount == 0) {
|
|
GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
|
|
("No valid frames found before end of stream"), (NULL));
|
|
}
|
|
/* newsegment before eos */
|
|
if (parse->priv->pending_segment) {
|
|
gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
|
|
parse->priv->pending_segment = NULL;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return handled;
|
|
}
|
|
|
|
|
|
/* gst_base_parse_src_event:
|
|
* @pad: #GstPad that received the event.
|
|
* @event: #GstEvent that was received.
|
|
*
|
|
* Handler for source pad events.
|
|
*
|
|
* Returns: TRUE if the event was handled.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_src_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstBaseParse *parse;
|
|
GstBaseParseClass *bclass;
|
|
gboolean handled = FALSE;
|
|
gboolean ret = TRUE;
|
|
|
|
parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
|
|
bclass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
|
|
GST_EVENT_TYPE_NAME (event));
|
|
|
|
if (bclass->src_event)
|
|
handled = bclass->src_event (parse, event);
|
|
|
|
if (!handled)
|
|
ret = gst_pad_event_default (pad, event);
|
|
|
|
gst_object_unref (parse);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_parse_is_seekable (GstBaseParse * parse)
|
|
{
|
|
/* FIXME: could do more here, e.g. check index or just send data from 0
|
|
* in pull mode and let decoder/sink clip */
|
|
return parse->priv->syncable;
|
|
}
|
|
|
|
/* gst_base_parse_src_eventfunc:
|
|
* @parse: #GstBaseParse.
|
|
* @event: #GstEvent that was received.
|
|
*
|
|
* Default srcpad event handler.
|
|
*
|
|
* Returns: TRUE if the event was handled and can be dropped.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
|
|
{
|
|
gboolean handled = FALSE;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEEK:
|
|
{
|
|
if (gst_base_parse_is_seekable (parse)) {
|
|
handled = gst_base_parse_handle_seek (parse, event);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
return handled;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_convert_default:
|
|
* @parse: #GstBaseParse.
|
|
* @src_format: #GstFormat describing the source format.
|
|
* @src_value: Source value to be converted.
|
|
* @dest_format: #GstFormat defining the converted format.
|
|
* @dest_value: Pointer where the conversion result will be put.
|
|
*
|
|
* Default implementation of "convert" vmethod in #GstBaseParse class.
|
|
*
|
|
* Returns: TRUE if conversion was successful.
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
gboolean
|
|
gst_base_parse_convert_default (GstBaseParse * parse,
|
|
GstFormat src_format,
|
|
gint64 src_value, GstFormat dest_format, gint64 * dest_value)
|
|
{
|
|
gboolean ret = FALSE;
|
|
guint64 bytes, duration;
|
|
|
|
if (G_UNLIKELY (src_format == dest_format)) {
|
|
*dest_value = src_value;
|
|
return TRUE;
|
|
}
|
|
|
|
if (G_UNLIKELY (src_value == -1)) {
|
|
*dest_value = -1;
|
|
return TRUE;
|
|
}
|
|
|
|
if (G_UNLIKELY (src_value == 0)) {
|
|
*dest_value = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
/* need at least some frames */
|
|
if (!parse->priv->framecount)
|
|
return FALSE;
|
|
|
|
duration = parse->priv->acc_duration / GST_MSECOND;
|
|
bytes = parse->priv->bytecount;
|
|
|
|
if (G_UNLIKELY (!duration || !bytes))
|
|
return FALSE;
|
|
|
|
if (src_format == GST_FORMAT_BYTES) {
|
|
if (dest_format == GST_FORMAT_TIME) {
|
|
/* BYTES -> TIME conversion */
|
|
GST_DEBUG_OBJECT (parse, "converting bytes -> time");
|
|
*dest_value = gst_util_uint64_scale (src_value, duration, bytes);
|
|
*dest_value *= GST_MSECOND;
|
|
GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
|
|
*dest_value / GST_MSECOND);
|
|
ret = TRUE;
|
|
}
|
|
} else if (src_format == GST_FORMAT_TIME) {
|
|
if (dest_format == GST_FORMAT_BYTES) {
|
|
GST_DEBUG_OBJECT (parse, "converting time -> bytes");
|
|
*dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
|
|
duration);
|
|
GST_DEBUG_OBJECT (parse,
|
|
"time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
|
|
src_value / GST_MSECOND, *dest_value);
|
|
ret = TRUE;
|
|
}
|
|
} else if (src_format == GST_FORMAT_DEFAULT) {
|
|
/* DEFAULT == frame-based */
|
|
if (dest_format == GST_FORMAT_TIME) {
|
|
if (parse->priv->fps_den) {
|
|
*dest_value = gst_util_uint64_scale (src_value,
|
|
GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
|
|
ret = TRUE;
|
|
}
|
|
} else if (dest_format == GST_FORMAT_BYTES) {
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_base_parse_update_duration (GstBaseParse * baseparse)
|
|
{
|
|
GstPad *peer;
|
|
GstBaseParse *parse;
|
|
|
|
parse = GST_BASE_PARSE (baseparse);
|
|
|
|
peer = gst_pad_get_peer (parse->sinkpad);
|
|
if (peer) {
|
|
GstFormat pformat = GST_FORMAT_BYTES;
|
|
gboolean qres = FALSE;
|
|
gint64 ptot, dest_value;
|
|
|
|
qres = gst_pad_query_duration (peer, &pformat, &ptot);
|
|
gst_object_unref (GST_OBJECT (peer));
|
|
if (qres) {
|
|
if (gst_base_parse_convert (parse, pformat, ptot,
|
|
GST_FORMAT_TIME, &dest_value)) {
|
|
parse->priv->estimated_duration = dest_value;
|
|
GST_LOG_OBJECT (parse,
|
|
"updated estimated duration to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (dest_value));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
|
|
gboolean post_avg, gboolean post_max)
|
|
{
|
|
GstTagList *taglist = NULL;
|
|
|
|
if (post_min && parse->priv->post_min_bitrate) {
|
|
taglist = gst_tag_list_new ();
|
|
|
|
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
|
|
GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
|
|
}
|
|
|
|
if (post_avg && parse->priv->post_avg_bitrate) {
|
|
if (taglist == NULL)
|
|
taglist = gst_tag_list_new ();
|
|
|
|
parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
|
|
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
|
|
parse->priv->avg_bitrate, NULL);
|
|
}
|
|
|
|
if (post_max && parse->priv->post_max_bitrate) {
|
|
if (taglist == NULL)
|
|
taglist = gst_tag_list_new ();
|
|
|
|
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
|
|
GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
|
|
parse->priv->min_bitrate, parse->priv->avg_bitrate,
|
|
parse->priv->max_bitrate);
|
|
|
|
if (taglist != NULL) {
|
|
gst_element_found_tags_for_pad (GST_ELEMENT_CAST (parse), parse->srcpad,
|
|
taglist);
|
|
}
|
|
}
|
|
|
|
/* gst_base_parse_update_bitrates:
|
|
* @parse: #GstBaseParse.
|
|
* @buffer: Current frame as a #GstBuffer
|
|
*
|
|
* Keeps track of the minimum and maximum bitrates, and also maintains a
|
|
* running average bitrate of the stream so far.
|
|
*/
|
|
static void
|
|
gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
|
|
{
|
|
/* Only update the tag on a 10 kbps delta */
|
|
static const gint update_threshold = 10000;
|
|
|
|
guint64 data_len, frame_dur;
|
|
gint overhead, frame_bitrate, old_avg_bitrate;
|
|
gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
|
|
GstBuffer *buffer = frame->buffer;
|
|
|
|
overhead = frame->overhead;
|
|
if (overhead == -1)
|
|
return;
|
|
|
|
data_len = GST_BUFFER_SIZE (buffer) - overhead;
|
|
parse->priv->data_bytecount += data_len;
|
|
|
|
/* duration should be valid by now,
|
|
* either set by subclass or maybe based on fps settings */
|
|
if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
|
|
/* Calculate duration of a frame from buffer properties */
|
|
frame_dur = GST_BUFFER_DURATION (buffer);
|
|
parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
|
|
parse->priv->acc_duration;
|
|
|
|
} else {
|
|
/* No way to figure out frame duration (is this even possible?) */
|
|
return;
|
|
}
|
|
|
|
/* override if subclass provided bitrate, e.g. metadata based */
|
|
if (parse->priv->bitrate) {
|
|
parse->priv->avg_bitrate = parse->priv->bitrate;
|
|
/* spread this (confirmed) info ASAP */
|
|
if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
|
|
gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
|
|
}
|
|
|
|
if (frame_dur)
|
|
frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
|
|
else
|
|
return;
|
|
|
|
GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
|
|
parse->priv->avg_bitrate);
|
|
|
|
if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
|
|
goto exit;
|
|
} else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
|
|
/* always post all at threshold time */
|
|
update_min = update_max = update_avg = TRUE;
|
|
}
|
|
|
|
if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
|
|
if (frame_bitrate < parse->priv->min_bitrate) {
|
|
parse->priv->min_bitrate = frame_bitrate;
|
|
update_min = TRUE;
|
|
}
|
|
|
|
if (frame_bitrate > parse->priv->max_bitrate) {
|
|
parse->priv->max_bitrate = frame_bitrate;
|
|
update_max = TRUE;
|
|
}
|
|
|
|
old_avg_bitrate = parse->priv->posted_avg_bitrate;
|
|
if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
|
|
|| (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
|
|
update_threshold)
|
|
update_avg = TRUE;
|
|
}
|
|
|
|
if ((update_min || update_avg || update_max))
|
|
gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
|
|
|
|
/* If average bitrate changes that much and no valid (time) duration provided,
|
|
* then post a new duration message so applications can update their cached
|
|
* values */
|
|
if (update_avg && !(parse->priv->duration_fmt == GST_FORMAT_TIME &&
|
|
GST_CLOCK_TIME_IS_VALID (parse->priv->duration)))
|
|
gst_element_post_message (GST_ELEMENT (parse),
|
|
gst_message_new_duration (GST_OBJECT (parse), GST_FORMAT_TIME, -1));
|
|
|
|
exit:
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_add_index_entry:
|
|
* @parse: #GstBaseParse.
|
|
* @offset: offset of entry
|
|
* @ts: timestamp associated with offset
|
|
* @key: whether entry refers to keyframe
|
|
* @force: add entry disregarding sanity checks
|
|
*
|
|
* Adds an entry to the index associating @offset to @ts. It is recommended
|
|
* to only add keyframe entries. @force allows to bypass checks, such as
|
|
* whether the stream is (upstream) seekable, another entry is already "close"
|
|
* to the new entry, etc.
|
|
*
|
|
* Returns: #gboolean indicating whether entry was added
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
gboolean
|
|
gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
|
|
GstClockTime ts, gboolean key, gboolean force)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstIndexAssociation associations[2];
|
|
|
|
GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
|
|
" @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
|
|
|
|
if (G_LIKELY (!force)) {
|
|
|
|
if (!parse->priv->upstream_seekable) {
|
|
GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
|
|
goto exit;
|
|
}
|
|
|
|
/* FIXME need better helper data structure that handles these issues
|
|
* related to ongoing collecting of index entries */
|
|
if (parse->priv->index_last_offset >= (gint64) offset) {
|
|
GST_DEBUG_OBJECT (parse, "already have entries up to offset "
|
|
"0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
|
|
goto exit;
|
|
}
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
|
|
GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
|
|
parse->priv->idx_interval) {
|
|
GST_DEBUG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (parse->priv->index_last_ts));
|
|
goto exit;
|
|
}
|
|
|
|
/* if last is not really the last one */
|
|
if (!parse->priv->index_last_valid) {
|
|
GstClockTime prev_ts;
|
|
|
|
gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
|
|
if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
|
|
GST_DEBUG_OBJECT (parse,
|
|
"entry too close to existing entry %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (prev_ts));
|
|
parse->priv->index_last_offset = offset;
|
|
parse->priv->index_last_ts = ts;
|
|
goto exit;
|
|
}
|
|
}
|
|
}
|
|
|
|
associations[0].format = GST_FORMAT_TIME;
|
|
associations[0].value = ts;
|
|
associations[1].format = GST_FORMAT_BYTES;
|
|
associations[1].value = offset;
|
|
|
|
/* index might change on-the-fly, although that would be nutty app ... */
|
|
g_static_mutex_lock (&parse->priv->index_lock);
|
|
gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
|
|
(key) ? GST_ASSOCIATION_FLAG_KEY_UNIT : GST_ASSOCIATION_FLAG_DELTA_UNIT,
|
|
2, (const GstIndexAssociation *) &associations);
|
|
g_static_mutex_unlock (&parse->priv->index_lock);
|
|
|
|
if (key) {
|
|
parse->priv->index_last_offset = offset;
|
|
parse->priv->index_last_ts = ts;
|
|
}
|
|
|
|
ret = TRUE;
|
|
|
|
exit:
|
|
return ret;
|
|
}
|
|
|
|
/* check for seekable upstream, above and beyond a mere query */
|
|
static void
|
|
gst_base_parse_check_seekability (GstBaseParse * parse)
|
|
{
|
|
GstQuery *query;
|
|
gboolean seekable = FALSE;
|
|
gint64 start = -1, stop = -1;
|
|
guint idx_interval = 0;
|
|
|
|
query = gst_query_new_seeking (GST_FORMAT_BYTES);
|
|
if (!gst_pad_peer_query (parse->sinkpad, query)) {
|
|
GST_DEBUG_OBJECT (parse, "seeking query failed");
|
|
goto done;
|
|
}
|
|
|
|
gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
|
|
|
|
/* try harder to query upstream size if we didn't get it the first time */
|
|
if (seekable && stop == -1) {
|
|
GstFormat fmt = GST_FORMAT_BYTES;
|
|
|
|
GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
|
|
gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop);
|
|
}
|
|
|
|
/* if upstream doesn't know the size, it's likely that it's not seekable in
|
|
* practice even if it technically may be seekable */
|
|
if (seekable && (start != 0 || stop <= start)) {
|
|
GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
|
|
seekable = FALSE;
|
|
}
|
|
|
|
/* let's not put every single frame into our index */
|
|
if (seekable) {
|
|
if (stop < 10 * 1024 * 1024)
|
|
idx_interval = 100;
|
|
else if (stop < 100 * 1024 * 1024)
|
|
idx_interval = 500;
|
|
else
|
|
idx_interval = 1000;
|
|
}
|
|
|
|
done:
|
|
gst_query_unref (query);
|
|
|
|
GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
|
|
G_GUINT64_FORMAT ")", seekable, start, stop);
|
|
parse->priv->upstream_seekable = seekable;
|
|
parse->priv->upstream_size = seekable ? stop : 0;
|
|
|
|
GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
|
|
parse->priv->idx_interval = idx_interval * GST_MSECOND;
|
|
}
|
|
|
|
/* some misc checks on upstream */
|
|
static void
|
|
gst_base_parse_check_upstream (GstBaseParse * parse)
|
|
{
|
|
GstFormat fmt = GST_FORMAT_TIME;
|
|
gint64 stop;
|
|
|
|
if (gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop))
|
|
if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
|
|
/* upstream has one, accept it also, and no further updates */
|
|
gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
|
|
parse->priv->upstream_has_duration = TRUE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
|
|
parse->priv->upstream_has_duration);
|
|
}
|
|
|
|
/* checks src caps to determine if dealing with audio or video */
|
|
/* TODO maybe forego automagic stuff and let subclass configure it ? */
|
|
static void
|
|
gst_base_parse_check_media (GstBaseParse * parse)
|
|
{
|
|
GstCaps *caps;
|
|
GstStructure *s;
|
|
|
|
caps = GST_PAD_CAPS (parse->srcpad);
|
|
if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
|
|
parse->priv->is_video =
|
|
g_str_has_prefix (gst_structure_get_name (s), "video");
|
|
} else {
|
|
/* historical default */
|
|
parse->priv->is_video = FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
|
|
}
|
|
|
|
/* takes ownership of frame */
|
|
static void
|
|
gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
|
|
{
|
|
if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
|
|
/* frame allocated on the heap, we can just take ownership */
|
|
g_queue_push_tail (&parse->priv->queued_frames, frame);
|
|
GST_TRACE ("queued frame %p", frame);
|
|
} else {
|
|
GstBaseParseFrame *copy;
|
|
|
|
/* probably allocated on the stack, must make a proper copy */
|
|
copy = gst_base_parse_frame_copy (frame);
|
|
g_queue_push_tail (&parse->priv->queued_frames, copy);
|
|
GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
|
|
gst_base_parse_frame_free (frame);
|
|
}
|
|
}
|
|
|
|
/* gst_base_parse_handle_and_push_buffer:
|
|
* @parse: #GstBaseParse.
|
|
* @klass: #GstBaseParseClass.
|
|
* @frame: (transfer full): a #GstBaseParseFrame
|
|
*
|
|
* Parses the frame from given buffer and pushes it forward. Also performs
|
|
* timestamp handling and checks the segment limits.
|
|
*
|
|
* This is called with srcpad STREAM_LOCK held.
|
|
*
|
|
* Returns: #GstFlowReturn
|
|
*/
|
|
static GstFlowReturn
|
|
gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
|
|
GstBaseParseClass * klass, GstBaseParseFrame * frame)
|
|
{
|
|
GstFlowReturn ret;
|
|
gint64 offset;
|
|
GstBuffer *buffer;
|
|
|
|
g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
|
|
|
|
buffer = frame->buffer;
|
|
|
|
if (parse->priv->discont) {
|
|
GST_DEBUG_OBJECT (parse, "marking DISCONT");
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
|
|
parse->priv->discont = FALSE;
|
|
}
|
|
|
|
/* some one-time start-up */
|
|
if (G_UNLIKELY (!parse->priv->framecount)) {
|
|
gst_base_parse_check_seekability (parse);
|
|
gst_base_parse_check_upstream (parse);
|
|
}
|
|
|
|
GST_LOG_OBJECT (parse,
|
|
"parsing frame at offset %" G_GUINT64_FORMAT
|
|
" (%#" G_GINT64_MODIFIER "x) of size %d",
|
|
GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
|
|
GST_BUFFER_SIZE (buffer));
|
|
|
|
/* use default handler to provide initial (upstream) metadata */
|
|
gst_base_parse_parse_frame (parse, frame);
|
|
|
|
/* store offset as it might get overwritten */
|
|
offset = GST_BUFFER_OFFSET (buffer);
|
|
ret = klass->parse_frame (parse, frame);
|
|
/* sync */
|
|
buffer = frame->buffer;
|
|
/* subclass must play nice */
|
|
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
|
|
|
|
/* check if subclass/format can provide ts.
|
|
* If so, that allows and enables extra seek and duration determining options */
|
|
if (G_UNLIKELY (parse->priv->first_frame_offset < 0 && ret == GST_FLOW_OK)) {
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) && parse->priv->has_timing_info
|
|
&& parse->priv->pad_mode == GST_ACTIVATE_PULL) {
|
|
parse->priv->first_frame_offset = offset;
|
|
parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
|
|
GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
|
|
" for first frame at offset %" G_GINT64_FORMAT,
|
|
GST_TIME_ARGS (parse->priv->first_frame_ts),
|
|
parse->priv->first_frame_offset);
|
|
if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
|
|
gint64 off;
|
|
GstClockTime last_ts = G_MAXINT64;
|
|
|
|
GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
|
|
gst_base_parse_locate_time (parse, &last_ts, &off);
|
|
if (GST_CLOCK_TIME_IS_VALID (last_ts))
|
|
gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
|
|
}
|
|
} else {
|
|
/* disable further checks */
|
|
parse->priv->first_frame_offset = 0;
|
|
}
|
|
}
|
|
|
|
/* again use default handler to add missing metadata;
|
|
* we may have new information on frame properties */
|
|
gst_base_parse_parse_frame (parse, frame);
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
|
|
GST_BUFFER_DURATION_IS_VALID (buffer)) {
|
|
parse->priv->next_ts =
|
|
GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
|
|
} else {
|
|
/* we lost track, do not produce bogus time next time around
|
|
* (probably means parser subclass has given up on parsing as well) */
|
|
GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
|
|
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
if (parse->priv->upstream_seekable && parse->priv->exact_position &&
|
|
GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
|
|
gst_base_parse_add_index_entry (parse, offset,
|
|
GST_BUFFER_TIMESTAMP (buffer),
|
|
!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
|
|
|
|
/* First buffers are dropped, this means that the subclass needs more
|
|
* frames to decide on the format and queues them internally */
|
|
/* convert internal flow to OK and mark discont for the next buffer. */
|
|
if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
|
|
gst_base_parse_frame_free (frame);
|
|
return GST_FLOW_OK;
|
|
} else if (ret == GST_BASE_PARSE_FLOW_QUEUED) {
|
|
gst_base_parse_queue_frame (parse, frame);
|
|
return GST_FLOW_OK;
|
|
} else if (ret != GST_FLOW_OK) {
|
|
return ret;
|
|
}
|
|
|
|
/* All OK, push queued frames if there are any */
|
|
if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
|
|
GstBaseParseFrame *queued_frame;
|
|
|
|
while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
|
|
queued_frame->buffer =
|
|
gst_buffer_make_metadata_writable (queued_frame->buffer);
|
|
gst_buffer_set_caps (queued_frame->buffer,
|
|
GST_PAD_CAPS (GST_BASE_PARSE_SRC_PAD (parse)));
|
|
gst_base_parse_push_frame (parse, queued_frame);
|
|
gst_base_parse_frame_free (queued_frame);
|
|
}
|
|
}
|
|
|
|
return gst_base_parse_push_frame (parse, frame);
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_push_frame:
|
|
* @parse: #GstBaseParse.
|
|
* @frame: (transfer full): a #GstBaseParseFrame
|
|
*
|
|
* Pushes the frame downstream, sends any pending events and
|
|
* does some timestamp and segment handling. Takes ownership
|
|
* of @frame and will clear it (if it was initialised with
|
|
* gst_base_parse_frame_init()) or free it.
|
|
*
|
|
* This must be called with sinkpad STREAM_LOCK held.
|
|
*
|
|
* Returns: #GstFlowReturn
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
GstFlowReturn
|
|
gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstClockTime last_start = GST_CLOCK_TIME_NONE;
|
|
GstClockTime last_stop = GST_CLOCK_TIME_NONE;
|
|
GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
GstBuffer *buffer;
|
|
|
|
g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
|
|
g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
|
|
|
|
GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
|
|
|
|
buffer = frame->buffer;
|
|
|
|
GST_LOG_OBJECT (parse,
|
|
"processing buffer of size %d with ts %" GST_TIME_FORMAT
|
|
", duration %" GST_TIME_FORMAT, GST_BUFFER_SIZE (buffer),
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
|
|
GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
|
|
|
|
/* update stats */
|
|
parse->priv->bytecount += GST_BUFFER_SIZE (buffer);
|
|
if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
|
|
parse->priv->framecount++;
|
|
if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
|
|
parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
|
|
}
|
|
}
|
|
/* 0 means disabled */
|
|
if (parse->priv->update_interval < 0)
|
|
parse->priv->update_interval = 50;
|
|
else if (parse->priv->update_interval > 0 &&
|
|
(parse->priv->framecount % parse->priv->update_interval) == 0)
|
|
gst_base_parse_update_duration (parse);
|
|
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
|
|
last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
|
|
if (last_start != GST_CLOCK_TIME_NONE
|
|
&& GST_BUFFER_DURATION_IS_VALID (buffer))
|
|
last_stop = last_start + GST_BUFFER_DURATION (buffer);
|
|
|
|
/* should have caps by now */
|
|
g_return_val_if_fail (GST_PAD_CAPS (parse->srcpad), GST_FLOW_ERROR);
|
|
|
|
/* segment adjustment magic; only if we are running the whole show */
|
|
if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
|
|
(parse->priv->pad_mode == GST_ACTIVATE_PULL ||
|
|
parse->priv->upstream_seekable)) {
|
|
/* segment times are typically estimates,
|
|
* actual frame data might lead subclass to different timestamps,
|
|
* so override segment start from what is supplied there */
|
|
if (G_UNLIKELY (parse->priv->pending_segment && !parse->priv->exact_position
|
|
&& GST_CLOCK_TIME_IS_VALID (last_start))) {
|
|
gst_event_unref (parse->priv->pending_segment);
|
|
parse->segment.start =
|
|
MIN ((guint64) last_start, (guint64) parse->segment.stop);
|
|
GST_DEBUG_OBJECT (parse,
|
|
"adjusting pending segment start to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (parse->segment.start));
|
|
parse->priv->pending_segment =
|
|
gst_event_new_new_segment (FALSE, parse->segment.rate,
|
|
parse->segment.format, parse->segment.start,
|
|
parse->segment.stop, parse->segment.start);
|
|
}
|
|
/* handle gaps, e.g. non-zero start-time, in as much not handled by above */
|
|
if (GST_CLOCK_TIME_IS_VALID (parse->segment.last_stop) &&
|
|
GST_CLOCK_TIME_IS_VALID (last_start)) {
|
|
GstClockTimeDiff diff;
|
|
|
|
/* only send newsegments with increasing start times,
|
|
* otherwise if these go back and forth downstream (sinks) increase
|
|
* accumulated time and running_time */
|
|
diff = GST_CLOCK_DIFF (parse->segment.last_stop, last_start);
|
|
if (G_UNLIKELY (diff > 2 * GST_SECOND
|
|
&& last_start > parse->segment.start
|
|
&& (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
|
|
|| last_start < parse->segment.stop))) {
|
|
GST_DEBUG_OBJECT (parse,
|
|
"Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
|
|
GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
|
|
"Sending updated NEWSEGMENT events", diff,
|
|
GST_TIME_ARGS (parse->segment.last_stop),
|
|
GST_TIME_ARGS (last_start));
|
|
if (G_UNLIKELY (parse->priv->pending_segment)) {
|
|
gst_event_unref (parse->priv->pending_segment);
|
|
parse->segment.start = last_start;
|
|
parse->priv->pending_segment =
|
|
gst_event_new_new_segment (FALSE, parse->segment.rate,
|
|
parse->segment.format, parse->segment.start,
|
|
parse->segment.stop, parse->segment.start);
|
|
} else {
|
|
/* send newsegment events such that the gap is not accounted in
|
|
* accum time, hence running_time */
|
|
/* close ahead of gap */
|
|
gst_pad_push_event (parse->srcpad,
|
|
gst_event_new_new_segment (TRUE, parse->segment.rate,
|
|
parse->segment.format, parse->segment.last_stop,
|
|
parse->segment.last_stop, parse->segment.last_stop));
|
|
/* skip gap */
|
|
gst_pad_push_event (parse->srcpad,
|
|
gst_event_new_new_segment (FALSE, parse->segment.rate,
|
|
parse->segment.format, last_start,
|
|
parse->segment.stop, last_start));
|
|
}
|
|
/* align segment view with downstream,
|
|
* prevents double-counting accum when closing segment */
|
|
gst_segment_set_newsegment (&parse->segment, FALSE,
|
|
parse->segment.rate, parse->segment.format, last_start,
|
|
parse->segment.stop, last_start);
|
|
parse->segment.last_stop = last_start;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* and should then also be linked downstream, so safe to send some events */
|
|
if (G_UNLIKELY (parse->priv->close_segment)) {
|
|
/* only set up by loop */
|
|
GST_DEBUG_OBJECT (parse, "loop sending close segment");
|
|
gst_pad_push_event (parse->srcpad, parse->priv->close_segment);
|
|
parse->priv->close_segment = NULL;
|
|
}
|
|
if (G_UNLIKELY (parse->priv->pending_segment)) {
|
|
GstEvent *pending_segment;
|
|
|
|
pending_segment = parse->priv->pending_segment;
|
|
parse->priv->pending_segment = NULL;
|
|
|
|
GST_DEBUG_OBJECT (parse, "%s push pending segment",
|
|
parse->priv->pad_mode == GST_ACTIVATE_PULL ? "loop" : "chain");
|
|
gst_pad_push_event (parse->srcpad, pending_segment);
|
|
|
|
/* have caps; check identity */
|
|
gst_base_parse_check_media (parse);
|
|
}
|
|
|
|
/* update bitrates and optionally post corresponding tags
|
|
* (following newsegment) */
|
|
gst_base_parse_update_bitrates (parse, frame);
|
|
|
|
if (G_UNLIKELY (parse->priv->pending_events)) {
|
|
GList *l;
|
|
|
|
for (l = parse->priv->pending_events; l != NULL; l = l->next) {
|
|
gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
|
|
}
|
|
g_list_free (parse->priv->pending_events);
|
|
parse->priv->pending_events = NULL;
|
|
}
|
|
|
|
if (klass->pre_push_frame) {
|
|
ret = klass->pre_push_frame (parse, frame);
|
|
} else {
|
|
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
|
|
}
|
|
|
|
/* take final ownership of frame buffer */
|
|
buffer = frame->buffer;
|
|
frame->buffer = NULL;
|
|
|
|
/* subclass must play nice */
|
|
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
|
|
|
|
/* decorate */
|
|
buffer = gst_buffer_make_metadata_writable (buffer);
|
|
gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
|
|
|
|
parse->priv->seen_keyframe |= parse->priv->is_video &&
|
|
!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
|
|
if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
|
|
GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
|
|
GST_BUFFER_TIMESTAMP (buffer) >
|
|
parse->segment.stop + parse->priv->lead_out_ts) {
|
|
GST_LOG_OBJECT (parse, "Dropped frame, after segment");
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
} else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
|
|
GST_BUFFER_DURATION_IS_VALID (buffer) &&
|
|
GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
|
|
GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
|
|
parse->priv->lead_in_ts < parse->segment.start) {
|
|
if (parse->priv->seen_keyframe) {
|
|
GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
|
|
ret = GST_FLOW_OK;
|
|
} else {
|
|
GST_LOG_OBJECT (parse, "Dropped frame, before segment");
|
|
ret = GST_BASE_PARSE_FLOW_DROPPED;
|
|
}
|
|
} else {
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
|
|
GST_LOG_OBJECT (parse, "frame (%d bytes) dropped",
|
|
GST_BUFFER_SIZE (buffer));
|
|
gst_buffer_unref (buffer);
|
|
ret = GST_FLOW_OK;
|
|
} else if (ret == GST_FLOW_OK) {
|
|
if (parse->segment.rate > 0.0) {
|
|
GST_LOG_OBJECT (parse, "pushing frame (%d bytes) now..",
|
|
GST_BUFFER_SIZE (buffer));
|
|
ret = gst_pad_push (parse->srcpad, buffer);
|
|
GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
|
|
} else {
|
|
GST_LOG_OBJECT (parse, "frame (%d bytes) queued for now",
|
|
GST_BUFFER_SIZE (buffer));
|
|
parse->priv->buffers_queued =
|
|
g_slist_prepend (parse->priv->buffers_queued, buffer);
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
} else {
|
|
GST_LOG_OBJECT (parse, "frame (%d bytes) not pushed: %s",
|
|
GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
|
|
gst_buffer_unref (buffer);
|
|
/* if we are not sufficiently in control, let upstream decide on EOS */
|
|
if (ret == GST_FLOW_UNEXPECTED &&
|
|
(parse->priv->passthrough ||
|
|
(parse->priv->pad_mode == GST_ACTIVATE_PUSH &&
|
|
!parse->priv->upstream_seekable)))
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
|
|
/* Update current running segment position */
|
|
if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
|
|
parse->segment.last_stop < last_stop)
|
|
gst_segment_set_last_stop (&parse->segment, GST_FORMAT_TIME, last_stop);
|
|
|
|
gst_base_parse_frame_free (frame);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* gst_base_parse_drain:
|
|
*
|
|
* Drains the adapter until it is empty. It decreases the min_frame_size to
|
|
* match the current adapter size and calls chain method until the adapter
|
|
* is emptied or chain returns with error.
|
|
*/
|
|
static void
|
|
gst_base_parse_drain (GstBaseParse * parse)
|
|
{
|
|
guint avail;
|
|
|
|
GST_DEBUG_OBJECT (parse, "draining");
|
|
parse->priv->drain = TRUE;
|
|
|
|
for (;;) {
|
|
avail = gst_adapter_available (parse->priv->adapter);
|
|
if (!avail)
|
|
break;
|
|
|
|
if (gst_base_parse_chain (parse->sinkpad, NULL) != GST_FLOW_OK) {
|
|
break;
|
|
}
|
|
|
|
/* nothing changed, maybe due to truncated frame; break infinite loop */
|
|
if (avail == gst_adapter_available (parse->priv->adapter)) {
|
|
GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
|
|
gst_adapter_clear (parse->priv->adapter);
|
|
}
|
|
}
|
|
|
|
parse->priv->drain = FALSE;
|
|
}
|
|
|
|
/* gst_base_parse_send_buffers
|
|
*
|
|
* Sends buffers collected in send_buffers downstream, and ensures that list
|
|
* is empty at the end (errors or not).
|
|
*/
|
|
static GstFlowReturn
|
|
gst_base_parse_send_buffers (GstBaseParse * parse)
|
|
{
|
|
GSList *send = NULL;
|
|
GstBuffer *buf;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
send = parse->priv->buffers_send;
|
|
|
|
/* send buffers */
|
|
while (send) {
|
|
buf = GST_BUFFER_CAST (send->data);
|
|
GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
|
|
GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
|
|
", offset %" G_GINT64_FORMAT, buf,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
|
|
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
|
|
|
|
/* iterate output queue an push downstream */
|
|
ret = gst_pad_push (parse->srcpad, buf);
|
|
send = g_slist_delete_link (send, send);
|
|
|
|
/* clear any leftover if error */
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
|
|
while (send) {
|
|
buf = GST_BUFFER_CAST (send->data);
|
|
gst_buffer_unref (buf);
|
|
send = g_slist_delete_link (send, send);
|
|
}
|
|
}
|
|
}
|
|
|
|
parse->priv->buffers_send = send;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* gst_base_parse_process_fragment:
|
|
*
|
|
* Processes a reverse playback (forward) fragment:
|
|
* - append head of last fragment that was skipped to current fragment data
|
|
* - drain the resulting current fragment data (i.e. repeated chain)
|
|
* - add time/duration (if needed) to frames queued by chain
|
|
* - push queued data
|
|
*/
|
|
static GstFlowReturn
|
|
gst_base_parse_process_fragment (GstBaseParse * parse, gboolean push_only)
|
|
{
|
|
GstBuffer *buf;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
gboolean seen_key = FALSE, seen_delta = FALSE;
|
|
|
|
if (push_only)
|
|
goto push;
|
|
|
|
/* restore order */
|
|
parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
|
|
while (parse->priv->buffers_pending) {
|
|
buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
|
|
GST_LOG_OBJECT (parse, "adding pending buffer (size %d)",
|
|
GST_BUFFER_SIZE (buf));
|
|
gst_adapter_push (parse->priv->adapter, buf);
|
|
parse->priv->buffers_pending =
|
|
g_slist_delete_link (parse->priv->buffers_pending,
|
|
parse->priv->buffers_pending);
|
|
}
|
|
|
|
/* invalidate so no fall-back timestamping is performed;
|
|
* ok if taken from subclass or upstream */
|
|
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
|
|
/* prevent it hanging around stop all the time */
|
|
parse->segment.last_stop = GST_CLOCK_TIME_NONE;
|
|
/* mark next run */
|
|
parse->priv->discont = TRUE;
|
|
|
|
/* chain looks for frames and queues resulting ones (in stead of pushing) */
|
|
/* initial skipped data is added to buffers_pending */
|
|
gst_base_parse_drain (parse);
|
|
|
|
push:
|
|
if (parse->priv->buffers_send) {
|
|
buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
|
|
seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
}
|
|
|
|
/* add metadata (if needed to queued buffers */
|
|
GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (parse->priv->last_ts));
|
|
while (parse->priv->buffers_queued) {
|
|
buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
|
|
|
|
/* no touching if upstream or parsing provided time */
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
|
|
GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
|
|
} else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
|
|
GST_BUFFER_DURATION_IS_VALID (buf)) {
|
|
if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
|
|
parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
|
|
else
|
|
parse->priv->last_ts = 0;
|
|
GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
|
|
GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
|
|
} else {
|
|
/* no idea, very bad */
|
|
GST_WARNING_OBJECT (parse, "could not determine time for buffer");
|
|
}
|
|
|
|
parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
|
|
|
|
/* reverse order for ascending sending */
|
|
/* send downstream at keyframe not preceded by a keyframe
|
|
* (e.g. that should identify start of collection of IDR nals) */
|
|
if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
|
|
if (seen_key) {
|
|
ret = gst_base_parse_send_buffers (parse);
|
|
/* if a problem, throw all to sending */
|
|
if (ret != GST_FLOW_OK) {
|
|
parse->priv->buffers_send =
|
|
g_slist_reverse (parse->priv->buffers_queued);
|
|
parse->priv->buffers_queued = NULL;
|
|
break;
|
|
}
|
|
seen_key = FALSE;
|
|
}
|
|
} else {
|
|
seen_delta = TRUE;
|
|
}
|
|
|
|
seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
|
|
parse->priv->buffers_send =
|
|
g_slist_prepend (parse->priv->buffers_send, buf);
|
|
parse->priv->buffers_queued =
|
|
g_slist_delete_link (parse->priv->buffers_queued,
|
|
parse->priv->buffers_queued);
|
|
}
|
|
|
|
/* audio may have all marked as keyframe, so arrange to send here */
|
|
if (!seen_delta)
|
|
ret = gst_base_parse_send_buffers (parse);
|
|
|
|
/* any trailing unused no longer usable (ideally none) */
|
|
if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
|
|
GST_DEBUG_OBJECT (parse, "discarding %d trailing bytes",
|
|
gst_adapter_available (parse->priv->adapter));
|
|
gst_adapter_clear (parse->priv->adapter);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* small helper that checks whether we have been trying to resync too long */
|
|
static inline GstFlowReturn
|
|
gst_base_parse_check_sync (GstBaseParse * parse)
|
|
{
|
|
if (G_UNLIKELY (parse->priv->discont &&
|
|
parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
|
|
GST_ELEMENT_ERROR (parse, STREAM, DECODE,
|
|
("Failed to parse stream"), (NULL));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstBaseParseClass *bclass;
|
|
GstBaseParse *parse;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstBuffer *outbuf = NULL;
|
|
GstBuffer *tmpbuf = NULL;
|
|
guint fsize = 1;
|
|
gint skip = -1;
|
|
const guint8 *data;
|
|
guint old_min_size = 0, min_size, av;
|
|
GstClockTime timestamp;
|
|
GstBaseParseFrame *frame;
|
|
|
|
parse = GST_BASE_PARSE (GST_OBJECT_PARENT (pad));
|
|
bclass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
frame = &parse->priv->frame;
|
|
|
|
if (G_LIKELY (buffer)) {
|
|
GST_LOG_OBJECT (parse, "buffer size: %d, offset = %" G_GINT64_FORMAT,
|
|
GST_BUFFER_SIZE (buffer), GST_BUFFER_OFFSET (buffer));
|
|
if (G_UNLIKELY (parse->priv->passthrough)) {
|
|
gst_base_parse_frame_init (frame);
|
|
frame->buffer = gst_buffer_make_metadata_writable (buffer);
|
|
return gst_base_parse_push_frame (parse, frame);
|
|
}
|
|
/* upstream feeding us in reverse playback;
|
|
* gather each fragment, then process it in single run */
|
|
if (parse->segment.rate < 0.0) {
|
|
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
|
|
GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
|
|
ret = gst_base_parse_process_fragment (parse, FALSE);
|
|
}
|
|
gst_adapter_push (parse->priv->adapter, buffer);
|
|
return ret;
|
|
}
|
|
gst_adapter_push (parse->priv->adapter, buffer);
|
|
}
|
|
|
|
if (G_UNLIKELY (buffer &&
|
|
GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
|
|
frame->_private_flags |= GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
|
|
gst_base_parse_frame_free (frame);
|
|
}
|
|
|
|
/* Parse and push as many frames as possible */
|
|
/* Stop either when adapter is empty or we are flushing */
|
|
while (!parse->priv->flushing) {
|
|
gboolean res;
|
|
|
|
/* maintain frame state for a single frame parsing round across _chain calls,
|
|
* so only init when needed */
|
|
if (!frame->_private_flags)
|
|
gst_base_parse_frame_init (frame);
|
|
|
|
tmpbuf = gst_buffer_new ();
|
|
|
|
old_min_size = 0;
|
|
/* Synchronization loop */
|
|
for (;;) {
|
|
/* note: if subclass indicates MAX fsize,
|
|
* this will not likely be available anyway ... */
|
|
min_size = MAX (parse->priv->min_frame_size, fsize);
|
|
av = gst_adapter_available (parse->priv->adapter);
|
|
|
|
/* loop safety check */
|
|
if (G_UNLIKELY (old_min_size >= min_size))
|
|
goto invalid_min;
|
|
old_min_size = min_size;
|
|
|
|
if (G_UNLIKELY (parse->priv->drain)) {
|
|
min_size = av;
|
|
GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
|
|
if (G_UNLIKELY (!min_size)) {
|
|
gst_buffer_unref (tmpbuf);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* Collect at least min_frame_size bytes */
|
|
if (av < min_size) {
|
|
GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)",
|
|
av);
|
|
gst_buffer_unref (tmpbuf);
|
|
goto done;
|
|
}
|
|
|
|
/* always pass all available data */
|
|
data = gst_adapter_peek (parse->priv->adapter, av);
|
|
GST_BUFFER_DATA (tmpbuf) = (guint8 *) data;
|
|
GST_BUFFER_SIZE (tmpbuf) = av;
|
|
GST_BUFFER_OFFSET (tmpbuf) = parse->priv->offset;
|
|
GST_BUFFER_FLAG_SET (tmpbuf, GST_MINI_OBJECT_FLAG_READONLY);
|
|
|
|
if (parse->priv->discont) {
|
|
GST_DEBUG_OBJECT (parse, "marking DISCONT");
|
|
GST_BUFFER_FLAG_SET (tmpbuf, GST_BUFFER_FLAG_DISCONT);
|
|
}
|
|
|
|
skip = -1;
|
|
gst_base_parse_frame_update (parse, frame, tmpbuf);
|
|
res = bclass->check_valid_frame (parse, frame, &fsize, &skip);
|
|
gst_buffer_replace (&frame->buffer, NULL);
|
|
if (res) {
|
|
if (gst_adapter_available (parse->priv->adapter) < fsize) {
|
|
GST_DEBUG_OBJECT (parse,
|
|
"found valid frame but not enough data available (only %d bytes)",
|
|
gst_adapter_available (parse->priv->adapter));
|
|
gst_buffer_unref (tmpbuf);
|
|
goto done;
|
|
}
|
|
GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
|
|
break;
|
|
}
|
|
if (skip == -1) {
|
|
/* subclass didn't touch this value. By default we skip 1 byte */
|
|
skip = 1;
|
|
}
|
|
if (skip > 0) {
|
|
GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
|
|
if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
|
|
/* reverse playback, and no frames found yet, so we are skipping
|
|
* the leading part of a fragment, which may form the tail of
|
|
* fragment coming later, hopefully subclass skips efficiently ... */
|
|
timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
|
|
outbuf = gst_adapter_take_buffer (parse->priv->adapter, skip);
|
|
outbuf = gst_buffer_make_metadata_writable (outbuf);
|
|
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
|
|
parse->priv->buffers_pending =
|
|
g_slist_prepend (parse->priv->buffers_pending, outbuf);
|
|
outbuf = NULL;
|
|
} else {
|
|
gst_adapter_flush (parse->priv->adapter, skip);
|
|
}
|
|
parse->priv->offset += skip;
|
|
if (!parse->priv->discont)
|
|
parse->priv->sync_offset = parse->priv->offset;
|
|
parse->priv->discont = TRUE;
|
|
/* something changed least; nullify loop check */
|
|
old_min_size = 0;
|
|
}
|
|
/* skip == 0 should imply subclass set min_size to need more data;
|
|
* we check this shortly */
|
|
if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
|
|
gst_buffer_unref (tmpbuf);
|
|
goto done;
|
|
}
|
|
}
|
|
gst_buffer_unref (tmpbuf);
|
|
tmpbuf = NULL;
|
|
|
|
if (skip > 0) {
|
|
/* Subclass found the sync, but still wants to skip some data */
|
|
GST_LOG_OBJECT (parse, "skipping %d bytes", skip);
|
|
gst_adapter_flush (parse->priv->adapter, skip);
|
|
parse->priv->offset += skip;
|
|
}
|
|
|
|
/* Grab lock to prevent a race with FLUSH_START handler */
|
|
GST_PAD_STREAM_LOCK (parse->srcpad);
|
|
|
|
/* FLUSH_START event causes the "flushing" flag to be set. In this
|
|
* case we can leave the frame pushing loop */
|
|
if (parse->priv->flushing) {
|
|
GST_PAD_STREAM_UNLOCK (parse->srcpad);
|
|
break;
|
|
}
|
|
|
|
/* move along with upstream timestamp (if any),
|
|
* but interpolate in between */
|
|
timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
|
|
if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
|
|
(parse->priv->prev_ts != timestamp)) {
|
|
parse->priv->prev_ts = parse->priv->next_ts = timestamp;
|
|
}
|
|
|
|
/* FIXME: Would it be more efficient to make a subbuffer instead? */
|
|
outbuf = gst_adapter_take_buffer (parse->priv->adapter, fsize);
|
|
outbuf = gst_buffer_make_metadata_writable (outbuf);
|
|
|
|
/* Subclass may want to know the data offset */
|
|
GST_BUFFER_OFFSET (outbuf) = parse->priv->offset;
|
|
parse->priv->offset += fsize;
|
|
GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
|
|
|
|
frame->buffer = outbuf;
|
|
ret = gst_base_parse_handle_and_push_frame (parse, bclass, frame);
|
|
GST_PAD_STREAM_UNLOCK (parse->srcpad);
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_LOG_OBJECT (parse, "push returned %d", ret);
|
|
break;
|
|
}
|
|
}
|
|
|
|
done:
|
|
GST_LOG_OBJECT (parse, "chain leaving");
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
invalid_min:
|
|
{
|
|
GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
|
|
("min_size evolution %d -> %d; breaking to avoid looping",
|
|
old_min_size, min_size));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* pull @size bytes at current offset,
|
|
* i.e. at least try to and possibly return a shorter buffer if near the end */
|
|
static GstFlowReturn
|
|
gst_base_parse_pull_range (GstBaseParse * parse, guint size,
|
|
GstBuffer ** buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
|
|
|
|
/* Caching here actually makes much less difference than one would expect.
|
|
* We do it mainly to avoid pulling buffers of 1 byte all the time */
|
|
if (parse->priv->cache) {
|
|
gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
|
|
gint cache_size = GST_BUFFER_SIZE (parse->priv->cache);
|
|
|
|
if (cache_offset <= parse->priv->offset &&
|
|
(parse->priv->offset + size) <= (cache_offset + cache_size)) {
|
|
*buffer = gst_buffer_create_sub (parse->priv->cache,
|
|
parse->priv->offset - cache_offset, size);
|
|
GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
|
|
return GST_FLOW_OK;
|
|
}
|
|
/* not enough data in the cache, free cache and get a new one */
|
|
gst_buffer_unref (parse->priv->cache);
|
|
parse->priv->cache = NULL;
|
|
}
|
|
|
|
/* refill the cache */
|
|
ret =
|
|
gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
|
|
64 * 1024), &parse->priv->cache);
|
|
if (ret != GST_FLOW_OK) {
|
|
parse->priv->cache = NULL;
|
|
return ret;
|
|
}
|
|
|
|
if (GST_BUFFER_SIZE (parse->priv->cache) >= size) {
|
|
*buffer = gst_buffer_create_sub (parse->priv->cache, 0, size);
|
|
GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* Not possible to get enough data, try a last time with
|
|
* requesting exactly the size we need */
|
|
gst_buffer_unref (parse->priv->cache);
|
|
parse->priv->cache = NULL;
|
|
|
|
ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
|
|
&parse->priv->cache);
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
|
|
*buffer = NULL;
|
|
return ret;
|
|
}
|
|
|
|
if (GST_BUFFER_SIZE (parse->priv->cache) < size) {
|
|
GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
|
|
G_GUINT64_FORMAT ": wanted %u bytes, got %u bytes", parse->priv->offset,
|
|
size, GST_BUFFER_SIZE (parse->priv->cache));
|
|
|
|
*buffer = parse->priv->cache;
|
|
parse->priv->cache = NULL;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
*buffer = gst_buffer_create_sub (parse->priv->cache, 0, size);
|
|
GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
|
|
{
|
|
gint64 offset = 0;
|
|
GstClockTime ts = 0;
|
|
GstBuffer *buffer;
|
|
GstFlowReturn ret;
|
|
|
|
GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
|
|
", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
|
|
parse->priv->last_offset);
|
|
|
|
if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
|
|
GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (parse->segment.start));
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
goto exit;
|
|
}
|
|
|
|
/* last fragment started at last_offset / last_ts;
|
|
* seek back 10s capped at 1MB */
|
|
if (parse->priv->last_ts >= 10 * GST_SECOND)
|
|
ts = parse->priv->last_ts - 10 * GST_SECOND;
|
|
/* if we are exact now, we will be more so going backwards */
|
|
if (parse->priv->exact_position) {
|
|
offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
|
|
} else {
|
|
GstFormat dstformat = GST_FORMAT_BYTES;
|
|
|
|
if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
|
|
&dstformat, &offset)) {
|
|
GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
|
|
}
|
|
}
|
|
offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
|
|
parse->priv->last_offset - 1024);
|
|
offset = MAX (0, offset);
|
|
|
|
GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
|
|
offset);
|
|
parse->priv->offset = offset;
|
|
|
|
ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
|
|
&buffer);
|
|
if (ret != GST_FLOW_OK)
|
|
goto exit;
|
|
|
|
/* offset will increase again as fragment is processed/parsed */
|
|
parse->priv->last_offset = offset;
|
|
|
|
gst_adapter_push (parse->priv->adapter, buffer);
|
|
ret = gst_base_parse_process_fragment (parse, FALSE);
|
|
if (ret != GST_FLOW_OK)
|
|
goto exit;
|
|
|
|
/* force previous fragment */
|
|
parse->priv->offset = -1;
|
|
|
|
exit:
|
|
return ret;
|
|
}
|
|
|
|
/* PULL mode:
|
|
* pull and scan for next frame starting from current offset
|
|
* ajusts sync, drain and offset going along */
|
|
static GstFlowReturn
|
|
gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
|
|
GstBaseParseFrame * frame, gboolean full)
|
|
{
|
|
GstBuffer *buffer, *outbuf;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
guint fsize = 1, min_size, old_min_size = 0;
|
|
gint skip = 0;
|
|
|
|
g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
|
|
|
|
GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
|
|
" (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
|
|
|
|
/* let's make this efficient for all subclass once and for all;
|
|
* maybe it does not need this much, but in the latter case, we know we are
|
|
* in pull mode here and might as well try to read and supply more anyway
|
|
* (so does the buffer caching mechanism) */
|
|
fsize = 64 * 1024;
|
|
|
|
while (TRUE) {
|
|
gboolean res;
|
|
|
|
min_size = MAX (parse->priv->min_frame_size, fsize);
|
|
/* loop safety check */
|
|
if (G_UNLIKELY (old_min_size >= min_size))
|
|
goto invalid_min;
|
|
old_min_size = min_size;
|
|
|
|
ret = gst_base_parse_pull_range (parse, min_size, &buffer);
|
|
if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
|
|
if (parse->priv->discont) {
|
|
GST_DEBUG_OBJECT (parse, "marking DISCONT");
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
|
|
}
|
|
|
|
/* if we got a short read, inform subclass we are draining leftover
|
|
* and no more is to be expected */
|
|
if (GST_BUFFER_SIZE (buffer) < min_size)
|
|
parse->priv->drain = TRUE;
|
|
|
|
skip = -1;
|
|
gst_base_parse_frame_update (parse, frame, buffer);
|
|
res = klass->check_valid_frame (parse, frame, &fsize, &skip);
|
|
gst_buffer_replace (&frame->buffer, NULL);
|
|
if (res) {
|
|
parse->priv->drain = FALSE;
|
|
GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
|
|
break;
|
|
}
|
|
parse->priv->drain = FALSE;
|
|
if (skip == -1)
|
|
skip = 1;
|
|
if (skip > 0) {
|
|
GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
|
|
if (full && parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
|
|
/* reverse playback, and no frames found yet, so we are skipping
|
|
* the leading part of a fragment, which may form the tail of
|
|
* fragment coming later, hopefully subclass skips efficiently ... */
|
|
outbuf = gst_buffer_create_sub (buffer, 0, skip);
|
|
parse->priv->buffers_pending =
|
|
g_slist_prepend (parse->priv->buffers_pending, outbuf);
|
|
outbuf = NULL;
|
|
}
|
|
parse->priv->offset += skip;
|
|
if (!parse->priv->discont)
|
|
parse->priv->sync_offset = parse->priv->offset;
|
|
parse->priv->discont = TRUE;
|
|
/* something changed at least; nullify loop check */
|
|
if (fsize == G_MAXUINT)
|
|
fsize = old_min_size + 64 * 1024;
|
|
old_min_size = 0;
|
|
}
|
|
/* skip == 0 should imply subclass set min_size to need more data;
|
|
* we check this shortly */
|
|
GST_DEBUG_OBJECT (parse, "finding sync...");
|
|
gst_buffer_unref (buffer);
|
|
if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* Does the subclass want to skip too? */
|
|
if (skip > 0)
|
|
parse->priv->offset += skip;
|
|
else if (skip < 0)
|
|
skip = 0;
|
|
|
|
if (fsize + skip <= GST_BUFFER_SIZE (buffer)) {
|
|
outbuf = gst_buffer_create_sub (buffer, skip, fsize);
|
|
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer) + skip;
|
|
GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
|
|
gst_buffer_unref (buffer);
|
|
} else {
|
|
gst_buffer_unref (buffer);
|
|
ret = gst_base_parse_pull_range (parse, fsize, &outbuf);
|
|
if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
if (GST_BUFFER_SIZE (outbuf) < fsize) {
|
|
gst_buffer_unref (outbuf);
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
}
|
|
}
|
|
|
|
parse->priv->offset += fsize;
|
|
|
|
frame->buffer = outbuf;
|
|
|
|
done:
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
invalid_min:
|
|
{
|
|
GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
|
|
("min_size evolution %d -> %d; breaking to avoid looping",
|
|
old_min_size, min_size));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Loop that is used in pull mode to retrieve data from upstream */
|
|
static void
|
|
gst_base_parse_loop (GstPad * pad)
|
|
{
|
|
GstBaseParse *parse;
|
|
GstBaseParseClass *klass;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstBaseParseFrame frame;
|
|
|
|
parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
|
|
klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
/* reverse playback:
|
|
* first fragment (closest to stop time) is handled normally below,
|
|
* then we pull in fragments going backwards */
|
|
if (parse->segment.rate < 0.0) {
|
|
/* check if we jumped back to a previous fragment,
|
|
* which is a post-first fragment */
|
|
if (parse->priv->offset < 0) {
|
|
ret = gst_base_parse_handle_previous_fragment (parse);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
gst_base_parse_frame_init (&frame);
|
|
ret = gst_base_parse_scan_frame (parse, klass, &frame, TRUE);
|
|
if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
|
|
/* This always cleans up frame, even if error occurs */
|
|
ret = gst_base_parse_handle_and_push_frame (parse, klass, &frame);
|
|
|
|
/* eat expected eos signalling past segment in reverse playback */
|
|
if (parse->segment.rate < 0.0 && ret == GST_FLOW_UNEXPECTED &&
|
|
parse->segment.last_stop >= parse->segment.stop) {
|
|
GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
|
|
/* push what was accumulated during loop run */
|
|
gst_base_parse_process_fragment (parse, TRUE);
|
|
/* force previous fragment */
|
|
parse->priv->offset = -1;
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
|
|
done:
|
|
if (ret == GST_FLOW_UNEXPECTED)
|
|
goto eos;
|
|
else if (ret != GST_FLOW_OK)
|
|
goto pause;
|
|
|
|
gst_object_unref (parse);
|
|
return;
|
|
|
|
/* ERRORS */
|
|
eos:
|
|
{
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
GST_DEBUG_OBJECT (parse, "eos");
|
|
/* fall-through */
|
|
}
|
|
pause:
|
|
{
|
|
gboolean push_eos = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
|
|
gst_flow_get_name (ret));
|
|
gst_pad_pause_task (parse->sinkpad);
|
|
|
|
if (ret == GST_FLOW_UNEXPECTED) {
|
|
/* handle end-of-stream/segment */
|
|
if (parse->segment.flags & GST_SEEK_FLAG_SEGMENT) {
|
|
gint64 stop;
|
|
|
|
if ((stop = parse->segment.stop) == -1)
|
|
stop = parse->segment.duration;
|
|
|
|
GST_DEBUG_OBJECT (parse, "sending segment_done");
|
|
|
|
gst_element_post_message
|
|
(GST_ELEMENT_CAST (parse),
|
|
gst_message_new_segment_done (GST_OBJECT_CAST (parse),
|
|
GST_FORMAT_TIME, stop));
|
|
} else {
|
|
/* If we STILL have zero frames processed, fire an error */
|
|
if (parse->priv->framecount == 0) {
|
|
GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
|
|
("No valid frames found before end of stream"), (NULL));
|
|
}
|
|
push_eos = TRUE;
|
|
}
|
|
} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
|
|
/* for fatal errors we post an error message, wrong-state is
|
|
* not fatal because it happens due to flushes and only means
|
|
* that we should stop now. */
|
|
GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
|
|
("streaming stopped, reason %s", gst_flow_get_name (ret)));
|
|
push_eos = TRUE;
|
|
}
|
|
if (push_eos) {
|
|
/* newsegment before eos */
|
|
if (parse->priv->pending_segment) {
|
|
gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
|
|
parse->priv->pending_segment = NULL;
|
|
}
|
|
gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
|
|
}
|
|
gst_object_unref (parse);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_parse_sink_activate (GstPad * sinkpad)
|
|
{
|
|
GstBaseParse *parse;
|
|
gboolean result = TRUE;
|
|
|
|
parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
|
|
|
|
GST_DEBUG_OBJECT (parse, "sink activate");
|
|
|
|
if (gst_pad_check_pull_range (sinkpad)) {
|
|
GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
|
|
result = gst_pad_activate_pull (sinkpad, TRUE);
|
|
} else {
|
|
GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
|
|
result = gst_pad_activate_push (sinkpad, TRUE);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (parse, "sink activate return %d", result);
|
|
gst_object_unref (parse);
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_parse_activate (GstBaseParse * parse, gboolean active)
|
|
{
|
|
GstBaseParseClass *klass;
|
|
gboolean result = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (parse, "activate %d", active);
|
|
|
|
klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
if (active) {
|
|
if (parse->priv->pad_mode == GST_ACTIVATE_NONE && klass->start)
|
|
result = klass->start (parse);
|
|
} else {
|
|
/* We must make sure streaming has finished before resetting things
|
|
* and calling the ::stop vfunc */
|
|
GST_PAD_STREAM_LOCK (parse->sinkpad);
|
|
GST_PAD_STREAM_UNLOCK (parse->sinkpad);
|
|
|
|
if (parse->priv->pad_mode != GST_ACTIVATE_NONE && klass->stop)
|
|
result = klass->stop (parse);
|
|
|
|
parse->priv->pad_mode = GST_ACTIVATE_NONE;
|
|
}
|
|
GST_DEBUG_OBJECT (parse, "activate return: %d", result);
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_parse_sink_activate_push (GstPad * pad, gboolean active)
|
|
{
|
|
gboolean result = TRUE;
|
|
GstBaseParse *parse;
|
|
|
|
parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
|
|
|
|
GST_DEBUG_OBJECT (parse, "sink activate push %d", active);
|
|
|
|
result = gst_base_parse_activate (parse, active);
|
|
|
|
if (result)
|
|
parse->priv->pad_mode = active ? GST_ACTIVATE_PUSH : GST_ACTIVATE_NONE;
|
|
|
|
GST_DEBUG_OBJECT (parse, "sink activate push return: %d", result);
|
|
|
|
gst_object_unref (parse);
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_parse_sink_activate_pull (GstPad * sinkpad, gboolean active)
|
|
{
|
|
gboolean result = FALSE;
|
|
GstBaseParse *parse;
|
|
|
|
parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
|
|
|
|
GST_DEBUG_OBJECT (parse, "activate pull %d", active);
|
|
|
|
result = gst_base_parse_activate (parse, active);
|
|
|
|
if (result) {
|
|
if (active) {
|
|
parse->priv->pending_segment = gst_event_new_new_segment (FALSE,
|
|
parse->segment.rate, parse->segment.format,
|
|
parse->segment.start, parse->segment.stop, parse->segment.last_stop);
|
|
result &=
|
|
gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
|
|
sinkpad);
|
|
} else {
|
|
result &= gst_pad_stop_task (sinkpad);
|
|
}
|
|
}
|
|
|
|
if (result)
|
|
parse->priv->pad_mode = active ? GST_ACTIVATE_PULL : GST_ACTIVATE_NONE;
|
|
|
|
GST_DEBUG_OBJECT (parse, "sink activate pull return: %d", result);
|
|
|
|
gst_object_unref (parse);
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_set_duration:
|
|
* @parse: #GstBaseParse.
|
|
* @fmt: #GstFormat.
|
|
* @duration: duration value.
|
|
* @interval: how often to update the duration estimate based on bitrate, or 0.
|
|
*
|
|
* Sets the duration of the currently playing media. Subclass can use this
|
|
* when it is able to determine duration and/or notices a change in the media
|
|
* duration. Alternatively, if @interval is non-zero (default), then stream
|
|
* duration is determined based on estimated bitrate, and updated every @interval
|
|
* frames.
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
void
|
|
gst_base_parse_set_duration (GstBaseParse * parse,
|
|
GstFormat fmt, gint64 duration, gint interval)
|
|
{
|
|
g_return_if_fail (parse != NULL);
|
|
|
|
if (parse->priv->upstream_has_duration) {
|
|
GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
|
|
goto exit;
|
|
}
|
|
|
|
if (duration != parse->priv->duration) {
|
|
GstMessage *m;
|
|
|
|
m = gst_message_new_duration (GST_OBJECT (parse), fmt, duration);
|
|
gst_element_post_message (GST_ELEMENT (parse), m);
|
|
|
|
/* TODO: what about duration tag? */
|
|
}
|
|
parse->priv->duration = duration;
|
|
parse->priv->duration_fmt = fmt;
|
|
GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
|
|
if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
|
|
if (interval != 0) {
|
|
GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
|
|
interval = 0;
|
|
}
|
|
}
|
|
GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
|
|
parse->priv->update_interval = interval;
|
|
exit:
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_set_average_bitrate:
|
|
* @parse: #GstBaseParse.
|
|
* @bitrate: average bitrate in bits/second
|
|
*
|
|
* Optionally sets the average bitrate detected in media (if non-zero),
|
|
* e.g. based on metadata, as it will be posted to the application.
|
|
*
|
|
* By default, announced average bitrate is estimated. The average bitrate
|
|
* is used to estimate the total duration of the stream and to estimate
|
|
* a seek position, if there's no index and the format is syncable
|
|
* (see gst_base_parse_set_syncable()).
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
void
|
|
gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
|
|
{
|
|
parse->priv->bitrate = bitrate;
|
|
GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_set_min_frame_size:
|
|
* @parse: #GstBaseParse.
|
|
* @min_size: Minimum size of the data that this base class should give to
|
|
* subclass.
|
|
*
|
|
* Subclass can use this function to tell the base class that it needs to
|
|
* give at least #min_size buffers.
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
void
|
|
gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
|
|
{
|
|
g_return_if_fail (parse != NULL);
|
|
|
|
parse->priv->min_frame_size = min_size;
|
|
GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_set_frame_rate:
|
|
* @parse: the #GstBaseParse to set
|
|
* @fps_num: frames per second (numerator).
|
|
* @fps_den: frames per second (denominator).
|
|
* @lead_in: frames needed before a segment for subsequent decode
|
|
* @lead_out: frames needed after a segment
|
|
*
|
|
* If frames per second is configured, parser can take care of buffer duration
|
|
* and timestamping. When performing segment clipping, or seeking to a specific
|
|
* location, a corresponding decoder might need an initial @lead_in and a
|
|
* following @lead_out number of frames to ensure the desired segment is
|
|
* entirely filled upon decoding.
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
void
|
|
gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
|
|
guint fps_den, guint lead_in, guint lead_out)
|
|
{
|
|
g_return_if_fail (parse != NULL);
|
|
|
|
parse->priv->fps_num = fps_num;
|
|
parse->priv->fps_den = fps_den;
|
|
if (!fps_num || !fps_den) {
|
|
GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
|
|
fps_num, fps_den);
|
|
fps_num = fps_den = 0;
|
|
parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
|
|
parse->priv->lead_in = parse->priv->lead_out = 0;
|
|
parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
|
|
} else {
|
|
parse->priv->frame_duration =
|
|
gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
|
|
parse->priv->lead_in = lead_in;
|
|
parse->priv->lead_out = lead_out;
|
|
parse->priv->lead_in_ts =
|
|
gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
|
|
parse->priv->lead_out_ts =
|
|
gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
|
|
/* aim for about 1.5s to estimate duration */
|
|
if (parse->priv->update_interval < 0) {
|
|
parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
|
|
GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
|
|
parse->priv->update_interval);
|
|
}
|
|
}
|
|
GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
|
|
fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
|
|
GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
|
|
"lead out: %d frames = %" G_GUINT64_FORMAT " ms",
|
|
lead_in, parse->priv->lead_in_ts / GST_MSECOND,
|
|
lead_out, parse->priv->lead_out_ts / GST_MSECOND);
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_set_has_timing_info:
|
|
* @parse: a #GstBaseParse
|
|
* @has_timing: whether frames carry timing information
|
|
*
|
|
* Set if frames carry timing information which the subclass can (generally)
|
|
* parse and provide. In particular, intrinsic (rather than estimated) time
|
|
* can be obtained following a seek.
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
void
|
|
gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
|
|
{
|
|
parse->priv->has_timing_info = has_timing;
|
|
GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_set_syncable:
|
|
* @parse: a #GstBaseParse
|
|
* @syncable: set if frame starts can be identified
|
|
*
|
|
* Set if frame starts can be identified. This is set by default and
|
|
* determines whether seeking based on bitrate averages
|
|
* is possible for a format/stream.
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
void
|
|
gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
|
|
{
|
|
parse->priv->syncable = syncable;
|
|
GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_set_passthrough:
|
|
* @parse: a #GstBaseParse
|
|
* @passthrough: %TRUE if parser should run in passthrough mode
|
|
*
|
|
* Set if the nature of the format or configuration does not allow (much)
|
|
* parsing, and the parser should operate in passthrough mode (which only
|
|
* applies when operating in push mode). That is, incoming buffers are
|
|
* pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
|
|
* callbacks will be invoked, but @pre_push_buffer will still be invoked,
|
|
* so subclass can perform as much or as little is appropriate for
|
|
* passthrough semantics in @pre_push_buffer.
|
|
*
|
|
* Since: 0.10.33
|
|
*/
|
|
void
|
|
gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
|
|
{
|
|
parse->priv->passthrough = passthrough;
|
|
GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_set_latency:
|
|
* @parse: a #GstBaseParse
|
|
* @min_latency: minimum parse latency
|
|
* @max_latency: maximum parse latency
|
|
*
|
|
* Sets the minimum and maximum (which may likely be equal) latency introduced
|
|
* by the parsing process. If there is such a latency, which depends on the
|
|
* particular parsing of the format, it typically corresponds to 1 frame duration.
|
|
*
|
|
* Since: 0.10.34
|
|
*/
|
|
void
|
|
gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
|
|
GstClockTime max_latency)
|
|
{
|
|
GST_OBJECT_LOCK (parse);
|
|
parse->priv->min_latency = min_latency;
|
|
parse->priv->max_latency = max_latency;
|
|
GST_OBJECT_UNLOCK (parse);
|
|
GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
|
|
GST_TIME_ARGS (max_latency));
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
|
|
GstClockTime * duration)
|
|
{
|
|
gboolean res = FALSE;
|
|
|
|
g_return_val_if_fail (duration != NULL, FALSE);
|
|
|
|
*duration = GST_CLOCK_TIME_NONE;
|
|
if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
|
|
GST_LOG_OBJECT (parse, "using provided duration");
|
|
*duration = parse->priv->duration;
|
|
res = TRUE;
|
|
} else if (parse->priv->duration != -1) {
|
|
GST_LOG_OBJECT (parse, "converting provided duration");
|
|
res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
|
|
parse->priv->duration, format, (gint64 *) duration);
|
|
} else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
|
|
GST_LOG_OBJECT (parse, "using estimated duration");
|
|
*duration = parse->priv->estimated_duration;
|
|
res = TRUE;
|
|
}
|
|
|
|
GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
|
|
GST_TIME_ARGS (*duration));
|
|
return res;
|
|
}
|
|
|
|
static const GstQueryType *
|
|
gst_base_parse_get_querytypes (GstPad * pad)
|
|
{
|
|
static const GstQueryType list[] = {
|
|
GST_QUERY_POSITION,
|
|
GST_QUERY_DURATION,
|
|
GST_QUERY_FORMATS,
|
|
GST_QUERY_SEEKING,
|
|
GST_QUERY_CONVERT,
|
|
0
|
|
};
|
|
|
|
return list;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_parse_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
GstBaseParse *parse;
|
|
gboolean res = FALSE;
|
|
|
|
parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
|
|
|
|
GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_POSITION:
|
|
{
|
|
gint64 dest_value;
|
|
GstFormat format;
|
|
|
|
GST_DEBUG_OBJECT (parse, "position query");
|
|
gst_query_parse_position (query, &format, NULL);
|
|
|
|
GST_OBJECT_LOCK (parse);
|
|
if (format == GST_FORMAT_BYTES) {
|
|
dest_value = parse->priv->offset;
|
|
res = TRUE;
|
|
} else if (format == parse->segment.format &&
|
|
GST_CLOCK_TIME_IS_VALID (parse->segment.last_stop)) {
|
|
dest_value = parse->segment.last_stop;
|
|
res = TRUE;
|
|
}
|
|
GST_OBJECT_UNLOCK (parse);
|
|
|
|
if (res)
|
|
gst_query_set_position (query, format, dest_value);
|
|
else {
|
|
res = gst_pad_query_default (pad, query);
|
|
if (!res) {
|
|
/* no precise result, upstream no idea either, then best estimate */
|
|
/* priv->offset is updated in both PUSH/PULL modes */
|
|
res = gst_base_parse_convert (parse,
|
|
GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case GST_QUERY_DURATION:
|
|
{
|
|
GstFormat format;
|
|
GstClockTime duration;
|
|
|
|
GST_DEBUG_OBJECT (parse, "duration query");
|
|
gst_query_parse_duration (query, &format, NULL);
|
|
|
|
/* consult upstream */
|
|
res = gst_pad_query_default (pad, query);
|
|
|
|
/* otherwise best estimate from us */
|
|
if (!res) {
|
|
res = gst_base_parse_get_duration (parse, format, &duration);
|
|
if (res)
|
|
gst_query_set_duration (query, format, duration);
|
|
}
|
|
break;
|
|
}
|
|
case GST_QUERY_SEEKING:
|
|
{
|
|
GstFormat fmt;
|
|
GstClockTime duration = GST_CLOCK_TIME_NONE;
|
|
gboolean seekable = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (parse, "seeking query");
|
|
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
|
|
|
|
/* consult upstream */
|
|
res = gst_pad_query_default (pad, query);
|
|
|
|
/* we may be able to help if in TIME */
|
|
if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
|
|
gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
|
|
/* already OK if upstream takes care */
|
|
GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
|
|
res, seekable);
|
|
if (!(res && seekable)) {
|
|
if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
|
|
|| duration == -1) {
|
|
/* seekable if we still have a chance to get duration later on */
|
|
seekable =
|
|
parse->priv->upstream_seekable && parse->priv->update_interval;
|
|
} else {
|
|
seekable = parse->priv->upstream_seekable;
|
|
GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
|
|
seekable);
|
|
}
|
|
gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
|
|
res = TRUE;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case GST_QUERY_FORMATS:
|
|
gst_query_set_formatsv (query, 3, fmtlist);
|
|
res = TRUE;
|
|
break;
|
|
case GST_QUERY_CONVERT:
|
|
{
|
|
GstFormat src_format, dest_format;
|
|
gint64 src_value, dest_value;
|
|
|
|
gst_query_parse_convert (query, &src_format, &src_value,
|
|
&dest_format, &dest_value);
|
|
|
|
res = gst_base_parse_convert (parse, src_format, src_value,
|
|
dest_format, &dest_value);
|
|
if (res) {
|
|
gst_query_set_convert (query, src_format, src_value,
|
|
dest_format, dest_value);
|
|
}
|
|
break;
|
|
}
|
|
case GST_QUERY_LATENCY:
|
|
{
|
|
if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
|
|
gboolean live;
|
|
GstClockTime min_latency, max_latency;
|
|
|
|
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
|
|
GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
|
|
GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
|
|
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
|
|
|
|
GST_OBJECT_LOCK (parse);
|
|
/* add our latency */
|
|
if (min_latency != -1)
|
|
min_latency += parse->priv->min_latency;
|
|
if (max_latency != -1)
|
|
max_latency += parse->priv->max_latency;
|
|
GST_OBJECT_UNLOCK (parse);
|
|
|
|
gst_query_set_latency (query, live, min_latency, max_latency);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_pad_query_default (pad, query);
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* scans for a cluster start from @pos,
|
|
* return GST_FLOW_OK and frame position/time in @pos/@time if found */
|
|
static GstFlowReturn
|
|
gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
|
|
GstClockTime * time, GstClockTime * duration)
|
|
{
|
|
GstBaseParseClass *klass;
|
|
gint64 orig_offset;
|
|
gboolean orig_drain, orig_discont;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstBuffer *buf = NULL;
|
|
GstBaseParseFrame frame;
|
|
|
|
g_return_val_if_fail (GST_FLOW_ERROR, pos != NULL);
|
|
g_return_val_if_fail (GST_FLOW_ERROR, time != NULL);
|
|
g_return_val_if_fail (GST_FLOW_ERROR, duration != NULL);
|
|
|
|
klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
*time = GST_CLOCK_TIME_NONE;
|
|
*duration = GST_CLOCK_TIME_NONE;
|
|
|
|
/* save state */
|
|
orig_offset = parse->priv->offset;
|
|
orig_discont = parse->priv->discont;
|
|
orig_drain = parse->priv->drain;
|
|
|
|
GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
|
|
" (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
|
|
|
|
gst_base_parse_frame_init (&frame);
|
|
|
|
/* jump elsewhere and locate next frame */
|
|
parse->priv->offset = *pos;
|
|
ret = gst_base_parse_scan_frame (parse, klass, &frame, FALSE);
|
|
if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
|
|
buf = frame.buffer;
|
|
GST_LOG_OBJECT (parse,
|
|
"peek parsing frame at offset %" G_GUINT64_FORMAT
|
|
" (%#" G_GINT64_MODIFIER "x) of size %d",
|
|
GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
|
|
|
|
/* get offset first, subclass parsing might dump other stuff in there */
|
|
*pos = GST_BUFFER_OFFSET (buf);
|
|
ret = klass->parse_frame (parse, &frame);
|
|
buf = frame.buffer;
|
|
|
|
/* but it should provide proper time */
|
|
*time = GST_BUFFER_TIMESTAMP (buf);
|
|
*duration = GST_BUFFER_DURATION (buf);
|
|
|
|
gst_base_parse_frame_free (&frame);
|
|
|
|
GST_LOG_OBJECT (parse,
|
|
"frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
|
|
GST_TIME_ARGS (*time), *pos);
|
|
|
|
done:
|
|
/* restore state */
|
|
parse->priv->offset = orig_offset;
|
|
parse->priv->discont = orig_discont;
|
|
parse->priv->drain = orig_drain;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* bisect and scan through file for frame starting before @time,
|
|
* returns OK and @time/@offset if found, NONE and/or error otherwise
|
|
* If @time == G_MAXINT64, scan for duration ( == last frame) */
|
|
static GstFlowReturn
|
|
gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
|
|
gint64 * _offset)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
gint64 lpos, hpos, newpos;
|
|
GstClockTime time, ltime, htime, newtime, dur;
|
|
gboolean cont = TRUE;
|
|
const GstClockTime tolerance = TARGET_DIFFERENCE;
|
|
const guint chunk = 4 * 1024;
|
|
|
|
g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
|
|
g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
|
|
|
|
/* TODO also make keyframe aware if useful some day */
|
|
|
|
time = *_time;
|
|
|
|
/* basic cases */
|
|
if (time == 0) {
|
|
*_offset = 0;
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
if (time == -1) {
|
|
*_offset = -1;
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* do not know at first */
|
|
*_offset = -1;
|
|
*_time = GST_CLOCK_TIME_NONE;
|
|
|
|
/* need initial positions; start and end */
|
|
lpos = parse->priv->first_frame_offset;
|
|
ltime = parse->priv->first_frame_ts;
|
|
htime = parse->priv->duration;
|
|
hpos = parse->priv->upstream_size;
|
|
|
|
/* check preconditions are satisfied;
|
|
* start and end are needed, except for special case where we scan for
|
|
* last frame to determine duration */
|
|
if (parse->priv->pad_mode != GST_ACTIVATE_PULL || !hpos ||
|
|
!GST_CLOCK_TIME_IS_VALID (ltime) ||
|
|
(!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* shortcut cases */
|
|
if (time < ltime) {
|
|
goto exit;
|
|
} else if (time < ltime + tolerance) {
|
|
*_offset = lpos;
|
|
*_time = ltime;
|
|
goto exit;
|
|
} else if (time >= htime) {
|
|
*_offset = hpos;
|
|
*_time = htime;
|
|
goto exit;
|
|
}
|
|
|
|
while (htime > ltime && cont) {
|
|
GST_LOG_OBJECT (parse,
|
|
"lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
|
|
GST_TIME_ARGS (ltime));
|
|
GST_LOG_OBJECT (parse,
|
|
"hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
|
|
GST_TIME_ARGS (htime));
|
|
if (G_UNLIKELY (time == G_MAXINT64)) {
|
|
newpos = hpos;
|
|
} else if (G_LIKELY (hpos > lpos)) {
|
|
newpos =
|
|
gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
|
|
lpos - chunk;
|
|
} else {
|
|
/* should mean lpos == hpos, since lpos <= hpos is invariant */
|
|
newpos = lpos;
|
|
/* we check this case once, but not forever, so break loop */
|
|
cont = FALSE;
|
|
}
|
|
|
|
/* ensure */
|
|
newpos = CLAMP (newpos, lpos, hpos);
|
|
GST_LOG_OBJECT (parse,
|
|
"estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
|
|
GST_TIME_ARGS (time), newpos);
|
|
|
|
ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
|
|
if (ret == GST_FLOW_UNEXPECTED) {
|
|
/* heuristic HACK */
|
|
hpos = MAX (lpos, hpos - chunk);
|
|
continue;
|
|
} else if (ret != GST_FLOW_OK) {
|
|
goto exit;
|
|
}
|
|
|
|
if (newtime == -1 || newpos == -1) {
|
|
GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
|
|
break;
|
|
}
|
|
|
|
if (G_UNLIKELY (time == G_MAXINT64)) {
|
|
*_offset = newpos;
|
|
*_time = newtime;
|
|
if (GST_CLOCK_TIME_IS_VALID (dur))
|
|
*_time += dur;
|
|
break;
|
|
} else if (newtime > time) {
|
|
/* overshoot */
|
|
hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
|
|
htime = newtime;
|
|
} else if (newtime + tolerance > time) {
|
|
/* close enough undershoot */
|
|
*_offset = newpos;
|
|
*_time = newtime;
|
|
break;
|
|
} else if (newtime < ltime) {
|
|
/* so a position beyond lpos resulted in earlier time than ltime ... */
|
|
GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
|
|
break;
|
|
} else {
|
|
/* undershoot too far */
|
|
newpos += newpos == lpos ? chunk : 0;
|
|
lpos = CLAMP (newpos, lpos, hpos);
|
|
ltime = newtime;
|
|
}
|
|
}
|
|
|
|
exit:
|
|
GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
|
|
GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
|
|
return ret;
|
|
}
|
|
|
|
static gint64
|
|
gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
|
|
gboolean before, GstClockTime * _ts)
|
|
{
|
|
gint64 bytes = 0, ts = 0;
|
|
GstIndexEntry *entry = NULL;
|
|
|
|
if (time == GST_CLOCK_TIME_NONE) {
|
|
ts = time;
|
|
bytes = -1;
|
|
goto exit;
|
|
}
|
|
|
|
g_static_mutex_lock (&parse->priv->index_lock);
|
|
if (parse->priv->index) {
|
|
/* Let's check if we have an index entry for that time */
|
|
entry = gst_index_get_assoc_entry (parse->priv->index,
|
|
parse->priv->index_id,
|
|
before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
|
|
GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
|
|
}
|
|
|
|
if (entry) {
|
|
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
|
|
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
|
|
|
|
GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
|
|
" at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
|
|
GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
|
|
} else {
|
|
GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (time));
|
|
if (!before) {
|
|
bytes = -1;
|
|
ts = GST_CLOCK_TIME_NONE;
|
|
}
|
|
}
|
|
g_static_mutex_unlock (&parse->priv->index_lock);
|
|
|
|
exit:
|
|
if (_ts)
|
|
*_ts = ts;
|
|
|
|
return bytes;
|
|
}
|
|
|
|
/* returns TRUE if seek succeeded */
|
|
static gboolean
|
|
gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
|
|
{
|
|
gdouble rate;
|
|
GstFormat format;
|
|
GstSeekFlags flags;
|
|
GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
|
|
gboolean flush, update, res = TRUE, accurate;
|
|
gint64 cur, stop, seekpos, seekstop;
|
|
GstSegment seeksegment = { 0, };
|
|
GstFormat dstformat;
|
|
GstClockTime start_ts;
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags,
|
|
&cur_type, &cur, &stop_type, &stop);
|
|
|
|
GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
|
|
"start type %d at %" GST_TIME_FORMAT ", end type %d at %"
|
|
GST_TIME_FORMAT, gst_format_get_name (format), rate,
|
|
cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
|
|
|
|
/* no negative rates in push mode */
|
|
if (rate < 0.0 && parse->priv->pad_mode == GST_ACTIVATE_PUSH)
|
|
goto negative_rate;
|
|
|
|
if (cur_type != GST_SEEK_TYPE_SET ||
|
|
(stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
|
|
goto wrong_type;
|
|
|
|
/* For any format other than TIME, see if upstream handles
|
|
* it directly or fail. For TIME, try upstream, but do it ourselves if
|
|
* it fails upstream */
|
|
if (format != GST_FORMAT_TIME) {
|
|
/* default action delegates to upstream */
|
|
res = FALSE;
|
|
goto done;
|
|
} else {
|
|
gst_event_ref (event);
|
|
if ((res = gst_pad_push_event (parse->sinkpad, event))) {
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* get flush flag */
|
|
flush = flags & GST_SEEK_FLAG_FLUSH;
|
|
|
|
/* copy segment, we need this because we still need the old
|
|
* segment when we close the current segment. */
|
|
memcpy (&seeksegment, &parse->segment, sizeof (GstSegment));
|
|
|
|
GST_DEBUG_OBJECT (parse, "configuring seek");
|
|
gst_segment_set_seek (&seeksegment, rate, format, flags,
|
|
cur_type, cur, stop_type, stop, &update);
|
|
|
|
/* accurate seeking implies seek tables are used to obtain position,
|
|
* and the requested segment is maintained exactly, not adjusted any way */
|
|
accurate = flags & GST_SEEK_FLAG_ACCURATE;
|
|
|
|
/* maybe we can be accurate for (almost) free */
|
|
gst_base_parse_find_offset (parse, seeksegment.last_stop, TRUE, &start_ts);
|
|
if (seeksegment.last_stop <= start_ts + TARGET_DIFFERENCE) {
|
|
GST_DEBUG_OBJECT (parse, "accurate seek possible");
|
|
accurate = TRUE;
|
|
}
|
|
if (accurate) {
|
|
GstClockTime startpos = seeksegment.last_stop;
|
|
|
|
/* accurate requested, so ... seek a bit before target */
|
|
if (startpos < parse->priv->lead_in_ts)
|
|
startpos = 0;
|
|
else
|
|
startpos -= parse->priv->lead_in_ts;
|
|
seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
|
|
seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
|
|
NULL);
|
|
} else {
|
|
start_ts = seeksegment.last_stop;
|
|
dstformat = GST_FORMAT_BYTES;
|
|
if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.last_stop,
|
|
&dstformat, &seekpos))
|
|
goto convert_failed;
|
|
if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
|
|
&dstformat, &seekstop))
|
|
goto convert_failed;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (parse,
|
|
"seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
|
|
start_ts, seekpos);
|
|
GST_DEBUG_OBJECT (parse,
|
|
"seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
|
|
seeksegment.stop, seekstop);
|
|
|
|
if (parse->priv->pad_mode == GST_ACTIVATE_PULL) {
|
|
gint64 last_stop;
|
|
|
|
GST_DEBUG_OBJECT (parse, "seek in PULL mode");
|
|
|
|
if (flush) {
|
|
if (parse->srcpad) {
|
|
GST_DEBUG_OBJECT (parse, "sending flush start");
|
|
gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
|
|
/* unlock upstream pull_range */
|
|
gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
|
|
}
|
|
} else {
|
|
gst_pad_pause_task (parse->sinkpad);
|
|
}
|
|
|
|
/* we should now be able to grab the streaming thread because we stopped it
|
|
* with the above flush/pause code */
|
|
GST_PAD_STREAM_LOCK (parse->sinkpad);
|
|
|
|
/* save current position */
|
|
last_stop = parse->segment.last_stop;
|
|
GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
|
|
last_stop);
|
|
|
|
/* now commit to new position */
|
|
|
|
/* prepare for streaming again */
|
|
if (flush) {
|
|
GST_DEBUG_OBJECT (parse, "sending flush stop");
|
|
gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop ());
|
|
gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop ());
|
|
gst_base_parse_clear_queues (parse);
|
|
} else {
|
|
if (parse->priv->close_segment)
|
|
gst_event_unref (parse->priv->close_segment);
|
|
|
|
parse->priv->close_segment = gst_event_new_new_segment (TRUE,
|
|
parse->segment.rate, parse->segment.format,
|
|
parse->segment.accum, parse->segment.last_stop, parse->segment.accum);
|
|
|
|
/* keep track of our last_stop */
|
|
seeksegment.accum = parse->segment.last_stop;
|
|
|
|
GST_DEBUG_OBJECT (parse, "Created close seg format %d, "
|
|
"start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
|
|
", pos = %" GST_TIME_FORMAT, format,
|
|
GST_TIME_ARGS (parse->segment.accum),
|
|
GST_TIME_ARGS (parse->segment.last_stop),
|
|
GST_TIME_ARGS (parse->segment.accum));
|
|
}
|
|
|
|
memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
|
|
|
|
/* store the newsegment event so it can be sent from the streaming thread. */
|
|
if (parse->priv->pending_segment)
|
|
gst_event_unref (parse->priv->pending_segment);
|
|
|
|
/* This will be sent later in _loop() */
|
|
parse->priv->pending_segment =
|
|
gst_event_new_new_segment (FALSE, parse->segment.rate,
|
|
parse->segment.format, parse->segment.start,
|
|
parse->segment.stop, parse->segment.start);
|
|
|
|
GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
|
|
"start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
|
|
", pos = %" GST_TIME_FORMAT, format,
|
|
GST_TIME_ARGS (parse->segment.start),
|
|
GST_TIME_ARGS (parse->segment.stop),
|
|
GST_TIME_ARGS (parse->segment.start));
|
|
|
|
/* one last chance in pull mode to stay accurate;
|
|
* maybe scan and subclass can find where to go */
|
|
if (!accurate) {
|
|
gint64 scanpos;
|
|
GstClockTime ts = seeksegment.last_stop;
|
|
|
|
gst_base_parse_locate_time (parse, &ts, &scanpos);
|
|
if (scanpos >= 0) {
|
|
accurate = TRUE;
|
|
seekpos = scanpos;
|
|
/* running collected index now consists of several intervals,
|
|
* so optimized check no longer possible */
|
|
parse->priv->index_last_valid = FALSE;
|
|
parse->priv->index_last_offset = 0;
|
|
parse->priv->index_last_ts = 0;
|
|
}
|
|
}
|
|
|
|
/* mark discont if we are going to stream from another position. */
|
|
if (seekpos != parse->priv->offset) {
|
|
GST_DEBUG_OBJECT (parse,
|
|
"mark DISCONT, we did a seek to another position");
|
|
parse->priv->offset = seekpos;
|
|
parse->priv->last_offset = seekpos;
|
|
parse->priv->seen_keyframe = FALSE;
|
|
parse->priv->discont = TRUE;
|
|
parse->priv->next_ts = start_ts;
|
|
parse->priv->last_ts = GST_CLOCK_TIME_NONE;
|
|
parse->priv->sync_offset = seekpos;
|
|
parse->priv->exact_position = accurate;
|
|
}
|
|
|
|
/* Start streaming thread if paused */
|
|
gst_pad_start_task (parse->sinkpad,
|
|
(GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
|
|
|
|
GST_PAD_STREAM_UNLOCK (parse->sinkpad);
|
|
|
|
/* handled seek */
|
|
res = TRUE;
|
|
} else {
|
|
GstEvent *new_event;
|
|
GstBaseParseSeek *seek;
|
|
|
|
/* The only thing we need to do in PUSH-mode is to send the
|
|
seek event (in bytes) to upstream. Segment / flush handling happens
|
|
in corresponding src event handlers */
|
|
GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
|
|
if (seekstop >= 0 && seekpos <= seekpos)
|
|
seekstop = seekpos;
|
|
new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flush,
|
|
GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
|
|
|
|
/* store segment info so its precise details can be reconstructed when
|
|
* receiving newsegment;
|
|
* this matters for all details when accurate seeking,
|
|
* is most useful to preserve NONE stop time otherwise */
|
|
seek = g_new0 (GstBaseParseSeek, 1);
|
|
seek->segment = seeksegment;
|
|
seek->accurate = accurate;
|
|
seek->offset = seekpos;
|
|
seek->start_ts = start_ts;
|
|
GST_OBJECT_LOCK (parse);
|
|
/* less optimal, but preserves order */
|
|
parse->priv->pending_seeks =
|
|
g_slist_append (parse->priv->pending_seeks, seek);
|
|
GST_OBJECT_UNLOCK (parse);
|
|
|
|
res = gst_pad_push_event (parse->sinkpad, new_event);
|
|
|
|
if (!res) {
|
|
GST_OBJECT_LOCK (parse);
|
|
parse->priv->pending_seeks =
|
|
g_slist_remove (parse->priv->pending_seeks, seek);
|
|
GST_OBJECT_UNLOCK (parse);
|
|
g_free (seek);
|
|
}
|
|
}
|
|
|
|
done:
|
|
/* handled event is ours to free */
|
|
if (res)
|
|
gst_event_unref (event);
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
negative_rate:
|
|
{
|
|
GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
|
|
res = FALSE;
|
|
goto done;
|
|
}
|
|
wrong_type:
|
|
{
|
|
GST_DEBUG_OBJECT (parse, "unsupported seek type.");
|
|
res = FALSE;
|
|
goto done;
|
|
}
|
|
convert_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
|
|
res = FALSE;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* Checks if bitrates are available from upstream tags so that we don't
|
|
* override them later
|
|
*/
|
|
static void
|
|
gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
|
|
{
|
|
GstTagList *taglist = NULL;
|
|
guint tmp;
|
|
|
|
gst_event_parse_tag (event, &taglist);
|
|
|
|
if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
|
|
GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
|
|
parse->priv->post_min_bitrate = FALSE;
|
|
}
|
|
if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
|
|
GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
|
|
parse->priv->post_avg_bitrate = FALSE;
|
|
}
|
|
if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
|
|
GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
|
|
parse->priv->post_max_bitrate = FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstBaseParse *parse;
|
|
GstBaseParseClass *klass;
|
|
gboolean res = TRUE;
|
|
|
|
parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
|
|
klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
|
|
|
|
if (klass->set_sink_caps)
|
|
res = klass->set_sink_caps (parse, caps);
|
|
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
gst_base_parse_set_index (GstElement * element, GstIndex * index)
|
|
{
|
|
GstBaseParse *parse = GST_BASE_PARSE (element);
|
|
|
|
g_static_mutex_lock (&parse->priv->index_lock);
|
|
if (parse->priv->index)
|
|
gst_object_unref (parse->priv->index);
|
|
if (index) {
|
|
parse->priv->index = gst_object_ref (index);
|
|
gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
|
|
&parse->priv->index_id);
|
|
parse->priv->own_index = FALSE;
|
|
} else {
|
|
parse->priv->index = NULL;
|
|
}
|
|
g_static_mutex_unlock (&parse->priv->index_lock);
|
|
}
|
|
|
|
static GstIndex *
|
|
gst_base_parse_get_index (GstElement * element)
|
|
{
|
|
GstBaseParse *parse = GST_BASE_PARSE (element);
|
|
GstIndex *result = NULL;
|
|
|
|
g_static_mutex_lock (&parse->priv->index_lock);
|
|
if (parse->priv->index)
|
|
result = gst_object_ref (parse->priv->index);
|
|
g_static_mutex_unlock (&parse->priv->index_lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_base_parse_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstBaseParse *parse;
|
|
GstStateChangeReturn result;
|
|
|
|
parse = GST_BASE_PARSE (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
/* If this is our own index destroy it as the
|
|
* old entries might be wrong for the new stream */
|
|
g_static_mutex_lock (&parse->priv->index_lock);
|
|
if (parse->priv->own_index) {
|
|
gst_object_unref (parse->priv->index);
|
|
parse->priv->index = NULL;
|
|
parse->priv->own_index = FALSE;
|
|
}
|
|
|
|
/* If no index was created, generate one */
|
|
if (G_UNLIKELY (!parse->priv->index)) {
|
|
GST_DEBUG_OBJECT (parse, "no index provided creating our own");
|
|
|
|
parse->priv->index = gst_index_factory_make ("memindex");
|
|
gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
|
|
&parse->priv->index_id);
|
|
parse->priv->own_index = TRUE;
|
|
}
|
|
g_static_mutex_unlock (&parse->priv->index_lock);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_base_parse_reset (parse);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|