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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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2657 lines
81 KiB
C
2657 lines
81 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>One sinkpad and one srcpad</para></listitem>
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* <listitem><para>Handles state changes</para></listitem>
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* <listitem><para>Does flushing</para></listitem>
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* <listitem><para>Push mode</para></listitem>
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* <listitem><para>Pull mode</para></listitem>
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* <listitem><para>Handles events (NEWSEGMENT/EOS/FLUSH)</para></listitem>
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* <listitem><para>Handles seeking in both modes</para></listitem>
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* <listitem><para>
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* Handles POSITION/DURATION/SEEKING/FORMAT/CONVERT queries
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* </para></listitem>
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* </itemizedlist>
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*
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* The purpose of this base class is to provide a 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 in 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 into 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 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. 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 buffer timestamp, duration and caps.
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* </para></listitem>
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* <listitem><para>
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* Finally the buffer can be pushed downstream and parsing loop starts
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* over again.
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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 and
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* 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. If
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* subclass doesn't provide @convert function, seeking will get disabled.
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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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* Alternatively, parsing (or specs) might yield a frames per seconds rate
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* which can be 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 possible).
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* Internally keeping track of frames and respective
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* sizes that have been pushed provides GstBaseParse with a bytes per frame
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* rate. 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 update
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* (estimated) duration at regular frame intervals.
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* If no (fixed) frames per second rate applies, default conversion will be
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* based on (estimated) bytes per second (but no default buffer metadata
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* can be provided in this case).
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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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* - Better segment handling:
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* - NEWSEGMENT for gaps
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* - Not NEWSEGMENT starting at 0 but at first frame timestamp
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* - GstIndex support
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* - Seek table generation and subclass seek entry injection
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* - Accurate seeking
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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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* - Let subclass decide if frames outside the segment should be dropped
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* - Send queries upstream
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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 "gstbaseparse.h"
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#define MIN_FRAMES_TO_POST_BITRATE 10
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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 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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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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guint fps_num, fps_den;
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guint update_interval;
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guint bitrate;
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GstBaseParseSeekable seekable;
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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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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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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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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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/* seek table entries only maintained if upstream is BYTE seekable */
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gboolean upstream_seekable;
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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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guint64 index_last_offset;
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};
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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 GType base_parse_type = 0;
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if (!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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base_parse_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstAudioBaseParseBad", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
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}
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return 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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GstBuffer * buffer, guint * framesize, gint * skipsize);
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static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
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GstBuffer * buffer);
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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 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_mutex_free (parse->parse_lock);
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g_object_unref (parse->adapter);
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if (parse->pending_segment) {
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p_ev = &parse->pending_segment;
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gst_event_replace (p_ev, NULL);
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}
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if (parse->close_segment) {
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p_ev = &parse->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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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_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_base_parse_class_init (GstBaseParseClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = G_OBJECT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
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gstelement_class = (GstElementClass *) klass;
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
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gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
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gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
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/* Default handlers */
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klass->check_valid_frame = gst_base_parse_check_frame;
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klass->parse_frame = gst_base_parse_parse_frame;
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klass->src_event = gst_base_parse_src_eventfunc;
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klass->convert = gst_base_parse_convert_default;
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GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
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"baseparse element");
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}
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static void
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gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
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{
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GstPadTemplate *pad_template;
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GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
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parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
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g_return_if_fail (pad_template != NULL);
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parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
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gst_pad_set_event_function (parse->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
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gst_pad_set_setcaps_function (parse->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_sink_setcaps));
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gst_pad_set_chain_function (parse->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_chain));
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gst_pad_set_activate_function (parse->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
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gst_pad_set_activatepush_function (parse->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_push));
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gst_pad_set_activatepull_function (parse->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_pull));
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gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
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GST_DEBUG_OBJECT (parse, "sinkpad created");
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
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g_return_if_fail (pad_template != NULL);
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parse->srcpad = gst_pad_new_from_template (pad_template, "src");
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gst_pad_set_event_function (parse->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
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gst_pad_set_query_type_function (parse->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_get_querytypes));
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gst_pad_set_query_function (parse->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_parse_query));
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gst_pad_use_fixed_caps (parse->srcpad);
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gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
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GST_DEBUG_OBJECT (parse, "src created");
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parse->parse_lock = g_mutex_new ();
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parse->adapter = gst_adapter_new ();
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parse->priv->pad_mode = GST_ACTIVATE_NONE;
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/* init state */
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gst_base_parse_reset (parse);
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GST_DEBUG_OBJECT (parse, "init ok");
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}
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static void
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gst_base_parse_reset (GstBaseParse * parse)
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{
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GST_OBJECT_LOCK (parse);
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gst_segment_init (&parse->segment, GST_FORMAT_TIME);
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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 = 50;
|
|
parse->priv->fps_num = parse->priv->fps_den = 0;
|
|
parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
|
|
parse->priv->seekable = GST_BASE_PARSE_SEEK_DEFAULT;
|
|
parse->priv->bitrate = 0;
|
|
parse->priv->framecount = 0;
|
|
parse->priv->bytecount = 0;
|
|
parse->priv->acc_duration = 0;
|
|
parse->priv->estimated_duration = -1;
|
|
parse->priv->next_ts = 0;
|
|
parse->priv->passthrough = 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 = 0;
|
|
parse->priv->index_last_offset = 0;
|
|
parse->priv->upstream_seekable = FALSE;
|
|
parse->priv->idx_interval = 0;
|
|
|
|
if (parse->pending_segment)
|
|
gst_event_unref (parse->pending_segment);
|
|
|
|
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;
|
|
}
|
|
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,
|
|
GstBuffer * buffer, guint * framesize, gint * skipsize)
|
|
{
|
|
*framesize = GST_BUFFER_SIZE (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, GstBuffer * 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", GST_EVENT_TYPE (event));
|
|
|
|
/* Cache all events except EOS, NEWSEGMENT and FLUSH_STOP if we have a
|
|
* pending segment */
|
|
if (parse->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.
|
|
*
|
|
* 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, offset = 0;
|
|
gboolean update;
|
|
|
|
gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
|
|
&format, &start, &stop, &pos);
|
|
|
|
|
|
if (format == GST_FORMAT_BYTES) {
|
|
GstClockTime seg_start, seg_stop, seg_pos;
|
|
|
|
/* stop time is allowed to be open-ended, but not start & pos */
|
|
seg_stop = GST_CLOCK_TIME_NONE;
|
|
offset = pos;
|
|
|
|
if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, start,
|
|
GST_FORMAT_TIME, (gint64 *) & seg_start) &&
|
|
gst_base_parse_convert (parse, GST_FORMAT_BYTES, pos,
|
|
GST_FORMAT_TIME, (gint64 *) & seg_pos)) {
|
|
gst_event_unref (event);
|
|
event = gst_event_new_new_segment_full (update, rate, applied_rate,
|
|
GST_FORMAT_TIME, seg_start, seg_stop, seg_pos);
|
|
format = GST_FORMAT_TIME;
|
|
GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. "
|
|
"start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
|
|
", pos = %" GST_TIME_FORMAT, GST_TIME_ARGS (seg_start),
|
|
GST_TIME_ARGS (seg_stop), GST_TIME_ARGS (seg_pos));
|
|
}
|
|
}
|
|
|
|
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);
|
|
} else {
|
|
/* not considered BYTE seekable if it is talking to us in TIME,
|
|
* whatever else it might claim */
|
|
parse->priv->upstream_seekable = FALSE;
|
|
}
|
|
|
|
gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
|
|
&format, &start, &stop, &pos);
|
|
|
|
gst_segment_set_newsegment_full (&parse->segment, update, rate,
|
|
applied_rate, format, start, stop, pos);
|
|
|
|
GST_DEBUG_OBJECT (parse, "Created 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));
|
|
|
|
/* 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->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");
|
|
gst_base_parse_drain (parse);
|
|
gst_adapter_clear (parse->adapter);
|
|
parse->priv->offset = offset;
|
|
parse->priv->sync_offset = offset;
|
|
parse->priv->next_ts = start;
|
|
parse->priv->discont = TRUE;
|
|
break;
|
|
}
|
|
|
|
case GST_EVENT_FLUSH_START:
|
|
parse->priv->flushing = TRUE;
|
|
handled = gst_pad_push_event (parse->srcpad, 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->adapter);
|
|
parse->priv->flushing = FALSE;
|
|
parse->priv->discont = TRUE;
|
|
break;
|
|
|
|
case GST_EVENT_EOS:
|
|
gst_base_parse_drain (parse);
|
|
|
|
/* 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->pending_segment) {
|
|
gst_pad_push_event (parse->srcpad, parse->pending_segment);
|
|
parse->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);
|
|
else
|
|
gst_event_unref (event);
|
|
|
|
gst_object_unref (parse);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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;
|
|
GstBaseParseClass *bclass;
|
|
|
|
bclass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEEK:
|
|
{
|
|
if (parse->priv->seekable > GST_BASE_PARSE_SEEK_NONE) {
|
|
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.
|
|
*/
|
|
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;
|
|
|
|
/* either frame info (having num means den also ok) or use average bitrate */
|
|
if (parse->priv->fps_num) {
|
|
duration = parse->priv->framecount * parse->priv->fps_den * 1000;
|
|
bytes = parse->priv->bytecount * parse->priv->fps_num;
|
|
} else {
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_update_duration:
|
|
* @parse: #GstBaseParse.
|
|
*
|
|
*/
|
|
static void
|
|
gst_base_parse_update_duration (GstBaseParse * aacparse)
|
|
{
|
|
GstPad *peer;
|
|
GstBaseParse *parse;
|
|
|
|
parse = GST_BASE_PARSE (aacparse);
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
|
|
gboolean post_avg, gboolean post_max)
|
|
{
|
|
GstTagList *taglist = gst_tag_list_new ();
|
|
|
|
if (post_min && parse->priv->post_min_bitrate)
|
|
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) {
|
|
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)
|
|
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);
|
|
|
|
gst_element_found_tags_for_pad (GST_ELEMENT (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, GstBuffer * buffer)
|
|
{
|
|
/* Only update the tag on a 10 kbps delta */
|
|
static const gint update_threshold = 10000;
|
|
|
|
GstBaseParseClass *klass;
|
|
guint64 data_len, frame_dur;
|
|
gint overhead = 0, frame_bitrate, old_avg_bitrate;
|
|
gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
|
|
|
|
klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
if (klass->get_frame_overhead) {
|
|
overhead = klass->get_frame_overhead (parse, buffer);
|
|
if (overhead == -1)
|
|
return;
|
|
}
|
|
|
|
data_len = GST_BUFFER_SIZE (buffer) - overhead;
|
|
parse->priv->data_bytecount += data_len;
|
|
|
|
if (parse->priv->fps_num) {
|
|
/* Calculate duration of a frame from frame properties */
|
|
frame_dur = (GST_SECOND * parse->priv->fps_den) / parse->priv->fps_num;
|
|
parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
|
|
(parse->priv->framecount * frame_dur);
|
|
|
|
} else if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
|
|
/* 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;
|
|
}
|
|
|
|
frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
|
|
|
|
GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
|
|
parse->priv->avg_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;
|
|
|
|
/* always post all at threshold time */
|
|
if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE)
|
|
gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
|
|
|
|
if (parse->priv->framecount > MIN_FRAMES_TO_POST_BITRATE &&
|
|
(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));
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
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;
|
|
}
|
|
|
|
if (parse->priv->index_last_offset >= 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_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;
|
|
}
|
|
}
|
|
|
|
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 ... */
|
|
GST_OBJECT_LOCK (parse);
|
|
gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
|
|
(key) ? GST_ASSOCIATION_FLAG_KEY_UNIT : GST_ASSOCIATION_FLAG_NONE,
|
|
2, (const GstIndexAssociation *) &associations);
|
|
GST_OBJECT_UNLOCK (parse);
|
|
|
|
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;
|
|
|
|
GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
|
|
parse->priv->idx_interval = idx_interval * GST_MSECOND;
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_handle_and_push_buffer:
|
|
* @parse: #GstBaseParse.
|
|
* @klass: #GstBaseParseClass.
|
|
* @buffer: #GstBuffer.
|
|
*
|
|
* 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_buffer (GstBaseParse * parse,
|
|
GstBaseParseClass * klass, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret;
|
|
|
|
if (parse->priv->discont) {
|
|
GST_DEBUG_OBJECT (parse, "marking DISCONT");
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
|
|
parse->priv->discont = FALSE;
|
|
}
|
|
|
|
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));
|
|
|
|
ret = klass->parse_frame (parse, buffer);
|
|
|
|
/* re-use default handler to add missing metadata as-much-as-possible */
|
|
gst_base_parse_parse_frame (parse, buffer);
|
|
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;
|
|
}
|
|
|
|
/* 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_buffer_unref (buffer);
|
|
return GST_FLOW_OK;
|
|
} else if (ret != GST_FLOW_OK) {
|
|
return ret;
|
|
}
|
|
|
|
return gst_base_parse_push_buffer (parse, buffer);
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_push_buffer:
|
|
* @parse: #GstBaseParse.
|
|
* @buffer: #GstBuffer.
|
|
*
|
|
* Pushes the buffer downstream, sends any pending events and
|
|
* does some timestamp and segment handling.
|
|
*
|
|
* This must be called with srcpad STREAM_LOCK held.
|
|
*
|
|
* Returns: #GstFlowReturn
|
|
*/
|
|
GstFlowReturn
|
|
gst_base_parse_push_buffer (GstBaseParse * parse, GstBuffer * buffer)
|
|
{
|
|
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);
|
|
|
|
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)));
|
|
|
|
/* some one-time start-up */
|
|
if (G_UNLIKELY (!parse->priv->framecount)) {
|
|
gst_base_parse_check_seekability (parse);
|
|
}
|
|
|
|
/* update stats */
|
|
parse->priv->bytecount += GST_BUFFER_SIZE (buffer);
|
|
if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BASE_PARSE_BUFFER_FLAG_NO_FRAME)) {
|
|
parse->priv->framecount++;
|
|
if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
|
|
parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
|
|
}
|
|
}
|
|
GST_BUFFER_FLAG_UNSET (buffer, GST_BASE_PARSE_BUFFER_FLAG_NO_FRAME);
|
|
if (parse->priv->update_interval &&
|
|
(parse->priv->framecount % parse->priv->update_interval) == 0)
|
|
gst_base_parse_update_duration (parse);
|
|
|
|
gst_base_parse_update_bitrates (parse, buffer);
|
|
|
|
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);
|
|
|
|
gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
|
|
|
|
/* 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->pending_segment && !parse->priv->passthrough &&
|
|
GST_CLOCK_TIME_IS_VALID (last_start))) {
|
|
gst_event_unref (parse->pending_segment);
|
|
/* stop time possibly lost this way,
|
|
* but unlikely and not really supported */
|
|
parse->pending_segment =
|
|
gst_event_new_new_segment (FALSE, parse->segment.rate,
|
|
parse->segment.format, last_start, -1, last_start);
|
|
}
|
|
|
|
/* and should then also be linked downstream, so safe to send some events */
|
|
if (parse->priv->pad_mode == GST_ACTIVATE_PULL) {
|
|
if (G_UNLIKELY (parse->close_segment)) {
|
|
GST_DEBUG_OBJECT (parse, "loop sending close segment");
|
|
gst_pad_push_event (parse->srcpad, parse->close_segment);
|
|
parse->close_segment = NULL;
|
|
}
|
|
|
|
if (G_UNLIKELY (parse->pending_segment)) {
|
|
GST_DEBUG_OBJECT (parse, "loop push pending segment");
|
|
gst_pad_push_event (parse->srcpad, parse->pending_segment);
|
|
parse->pending_segment = NULL;
|
|
}
|
|
} else {
|
|
if (G_UNLIKELY (parse->pending_segment)) {
|
|
GST_DEBUG_OBJECT (parse, "chain pushing a pending segment");
|
|
gst_pad_push_event (parse->srcpad, parse->pending_segment);
|
|
parse->pending_segment = NULL;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* TODO: Add to seek table */
|
|
|
|
if (klass->pre_push_buffer)
|
|
ret = klass->pre_push_buffer (parse, buffer);
|
|
else
|
|
ret = GST_BASE_PARSE_FLOW_CLIP;
|
|
|
|
if (ret == GST_BASE_PARSE_FLOW_CLIP) {
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
|
|
GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
|
|
GST_BUFFER_TIMESTAMP (buffer) > parse->segment.stop) {
|
|
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->segment.start) {
|
|
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) {
|
|
ret = gst_pad_push (parse->srcpad, buffer);
|
|
GST_LOG_OBJECT (parse, "frame (%d bytes) pushed: %s",
|
|
GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
|
|
} else {
|
|
gst_buffer_unref (buffer);
|
|
GST_LOG_OBJECT (parse, "frame (%d bytes) not pushed: %s",
|
|
GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
|
|
}
|
|
|
|
/* Update current running segment position */
|
|
if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE)
|
|
gst_segment_set_last_stop (&parse->segment, GST_FORMAT_TIME, last_stop);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_drain:
|
|
* @parse: #GstBaseParse.
|
|
*
|
|
* 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->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->adapter)) {
|
|
GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
|
|
gst_adapter_clear (parse->adapter);
|
|
}
|
|
}
|
|
|
|
parse->priv->drain = FALSE;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_chain:
|
|
* @pad: #GstPad.
|
|
* @buffer: #GstBuffer.
|
|
*
|
|
* Returns: #GstFlowReturn.
|
|
*/
|
|
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 = 0;
|
|
gint skip = -1;
|
|
const guint8 *data;
|
|
guint min_size;
|
|
GstClockTime timestamp;
|
|
|
|
parse = GST_BASE_PARSE (GST_OBJECT_PARENT (pad));
|
|
bclass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
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)) {
|
|
buffer = gst_buffer_make_metadata_writable (buffer);
|
|
return gst_base_parse_push_buffer (parse, buffer);
|
|
} else
|
|
gst_adapter_push (parse->adapter, buffer);
|
|
}
|
|
|
|
/* Parse and push as many frames as possible */
|
|
/* Stop either when adapter is empty or we are flushing */
|
|
while (!parse->priv->flushing) {
|
|
tmpbuf = gst_buffer_new ();
|
|
|
|
/* Synchronization loop */
|
|
for (;;) {
|
|
GST_BASE_PARSE_LOCK (parse);
|
|
min_size = parse->priv->min_frame_size;
|
|
GST_BASE_PARSE_UNLOCK (parse);
|
|
|
|
if (G_UNLIKELY (parse->priv->drain)) {
|
|
min_size = gst_adapter_available (parse->adapter);
|
|
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 (gst_adapter_available (parse->adapter) < min_size) {
|
|
GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)",
|
|
gst_adapter_available (parse->adapter));
|
|
gst_buffer_unref (tmpbuf);
|
|
goto done;
|
|
}
|
|
|
|
data = gst_adapter_peek (parse->adapter, min_size);
|
|
GST_BUFFER_DATA (tmpbuf) = (guint8 *) data;
|
|
GST_BUFFER_SIZE (tmpbuf) = min_size;
|
|
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;
|
|
if (bclass->check_valid_frame (parse, tmpbuf, &fsize, &skip)) {
|
|
if (gst_adapter_available (parse->adapter) < fsize) {
|
|
GST_DEBUG_OBJECT (parse,
|
|
"found valid frame but not enough data available (only %d bytes)",
|
|
gst_adapter_available (parse->adapter));
|
|
gst_buffer_unref (tmpbuf);
|
|
goto done;
|
|
}
|
|
break;
|
|
}
|
|
if (skip > 0) {
|
|
GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
|
|
gst_adapter_flush (parse->adapter, skip);
|
|
parse->priv->offset += skip;
|
|
if (!parse->priv->discont)
|
|
parse->priv->sync_offset = parse->priv->offset;
|
|
parse->priv->discont = TRUE;
|
|
} else if (skip == -1) {
|
|
/* subclass didn't touch this value. By default we skip 1 byte */
|
|
GST_LOG_OBJECT (parse, "finding sync, skipping 1 byte");
|
|
gst_adapter_flush (parse->adapter, 1);
|
|
parse->priv->offset++;
|
|
if (!parse->priv->discont)
|
|
parse->priv->sync_offset = parse->priv->offset;
|
|
parse->priv->discont = TRUE;
|
|
}
|
|
/* There is a possibility that subclass set the skip value to zero.
|
|
This means that it has probably found a frame but wants to ask
|
|
more data (by increasing the min_size) to be sure of this. */
|
|
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->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;
|
|
}
|
|
|
|
/* FIXME: Would it be more efficient to make a subbuffer instead? */
|
|
outbuf = gst_adapter_take_buffer (parse->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;
|
|
|
|
/* move along with upstream timestamp (if any),
|
|
* but interpolate in between */
|
|
timestamp = gst_adapter_prev_timestamp (parse->adapter, NULL);
|
|
if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
|
|
(parse->priv->prev_ts != timestamp)) {
|
|
parse->priv->prev_ts = parse->priv->next_ts = timestamp;
|
|
}
|
|
|
|
ret = gst_base_parse_handle_and_push_buffer (parse, bclass, outbuf);
|
|
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;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_loop:
|
|
* @pad: GstPad
|
|
*
|
|
* Loop that is used in pull mode to retrieve data from upstream.
|
|
*/
|
|
static void
|
|
gst_base_parse_loop (GstPad * pad)
|
|
{
|
|
GstBaseParse *parse;
|
|
GstBaseParseClass *klass;
|
|
GstBuffer *buffer, *outbuf;
|
|
gboolean ret = FALSE;
|
|
guint fsize = 0, min_size;
|
|
gint skip = 0;
|
|
|
|
parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
|
|
klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
/* TODO: Check if we reach segment stop limit */
|
|
|
|
while (TRUE) {
|
|
|
|
GST_BASE_PARSE_LOCK (parse);
|
|
min_size = parse->priv->min_frame_size;
|
|
GST_BASE_PARSE_UNLOCK (parse);
|
|
|
|
ret = gst_base_parse_pull_range (parse, min_size, &buffer);
|
|
|
|
if (ret == GST_FLOW_UNEXPECTED)
|
|
goto eos;
|
|
else if (ret != GST_FLOW_OK)
|
|
goto need_pause;
|
|
|
|
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;
|
|
if (klass->check_valid_frame (parse, buffer, &fsize, &skip)) {
|
|
parse->priv->drain = FALSE;
|
|
break;
|
|
}
|
|
parse->priv->drain = FALSE;
|
|
if (skip > 0) {
|
|
GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
|
|
parse->priv->offset += skip;
|
|
if (!parse->priv->discont)
|
|
parse->priv->sync_offset = parse->priv->offset;
|
|
parse->priv->discont = TRUE;
|
|
} else if (skip == -1) {
|
|
GST_LOG_OBJECT (parse, "finding sync, skipping 1 byte");
|
|
parse->priv->offset++;
|
|
if (!parse->priv->discont)
|
|
parse->priv->sync_offset = parse->priv->offset;
|
|
parse->priv->discont = TRUE;
|
|
}
|
|
/* skip == 0 should imply subclass set min_size to need more data ... */
|
|
GST_DEBUG_OBJECT (parse, "finding sync...");
|
|
gst_buffer_unref (buffer);
|
|
if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (fsize <= GST_BUFFER_SIZE (buffer)) {
|
|
outbuf = gst_buffer_create_sub (buffer, 0, fsize);
|
|
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer);
|
|
gst_buffer_unref (buffer);
|
|
} else {
|
|
gst_buffer_unref (buffer);
|
|
ret = gst_base_parse_pull_range (parse, fsize, &outbuf);
|
|
|
|
if (ret == GST_FLOW_UNEXPECTED)
|
|
goto eos;
|
|
else if (ret != GST_FLOW_OK)
|
|
goto need_pause;
|
|
if (GST_BUFFER_SIZE (outbuf) < fsize)
|
|
goto eos;
|
|
}
|
|
|
|
parse->priv->offset += fsize;
|
|
|
|
/* Does the subclass want to skip too? */
|
|
if (skip > 0)
|
|
parse->priv->offset += skip;
|
|
|
|
/* This always unrefs the outbuf, even if error occurs */
|
|
ret = gst_base_parse_handle_and_push_buffer (parse, klass, outbuf);
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (parse, "flow: %s", gst_flow_get_name (ret));
|
|
if (ret == GST_FLOW_UNEXPECTED) {
|
|
gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
|
|
} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
|
|
GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
|
|
("streaming task paused, reason: %s", gst_flow_get_name (ret)));
|
|
gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
|
|
}
|
|
goto need_pause;
|
|
}
|
|
|
|
done:
|
|
gst_object_unref (parse);
|
|
return;
|
|
|
|
need_pause:
|
|
{
|
|
GST_LOG_OBJECT (parse, "pausing task %d", ret);
|
|
gst_pad_pause_task (pad);
|
|
gst_object_unref (parse);
|
|
return;
|
|
}
|
|
eos:
|
|
{
|
|
GST_LOG_OBJECT (parse, "sending eos");
|
|
gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
|
|
goto need_pause;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_sink_activate:
|
|
* @sinkpad: #GstPad to be activated.
|
|
*
|
|
* Returns: TRUE if activation succeeded.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_activate:
|
|
* @parse: #GstBaseParse.
|
|
* @active: TRUE if element will be activated, FALSE if disactivated.
|
|
*
|
|
* Returns: TRUE if the operation succeeded.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_activate (GstBaseParse * parse, gboolean active)
|
|
{
|
|
GstBaseParseClass *klass;
|
|
gboolean result = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (parse, "activate");
|
|
|
|
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: %d", result);
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_sink_activate_push:
|
|
* @pad: #GstPad to be (de)activated.
|
|
* @active: TRUE when activating, FALSE when deactivating.
|
|
*
|
|
* Returns: TRUE if (de)activation succeeded.
|
|
*/
|
|
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");
|
|
|
|
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: %d", result);
|
|
|
|
gst_object_unref (parse);
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_sink_activate_pull:
|
|
* @sinkpad: #GstPad to be (de)activated.
|
|
* @active: TRUE when activating, FALSE when deactivating.
|
|
*
|
|
* Returns: TRUE if (de)activation succeeded.
|
|
*/
|
|
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");
|
|
|
|
result = gst_base_parse_activate (parse, active);
|
|
|
|
if (result) {
|
|
if (active) {
|
|
parse->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: %d", result);
|
|
|
|
gst_object_unref (parse);
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_set_duration:
|
|
* @parse: #GstBaseParse.
|
|
* @fmt: #GstFormat.
|
|
* @duration: duration value.
|
|
*
|
|
* Sets the duration of the currently playing media. Subclass can use this
|
|
* when it notices a change in the media duration.
|
|
*/
|
|
void
|
|
gst_base_parse_set_duration (GstBaseParse * parse,
|
|
GstFormat fmt, gint64 duration)
|
|
{
|
|
g_return_if_fail (parse != NULL);
|
|
|
|
GST_BASE_PARSE_LOCK (parse);
|
|
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);
|
|
GST_BASE_PARSE_UNLOCK (parse);
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_set_seek:
|
|
* @parse: #GstBaseParse.
|
|
* @seek: #GstBaseParseSeekable.
|
|
* @abitrate: average bitrate.
|
|
*
|
|
* Sets whether and how the media is seekable (in time).
|
|
* Also optionally provides 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, and seekability is assumed
|
|
* possible based on estimated bitrate.
|
|
*/
|
|
void
|
|
gst_base_parse_set_seek (GstBaseParse * parse,
|
|
GstBaseParseSeekable seek, guint bitrate)
|
|
{
|
|
parse->priv->seekable = seek;
|
|
parse->priv->bitrate = 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.
|
|
*/
|
|
void
|
|
gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
|
|
{
|
|
g_return_if_fail (parse != NULL);
|
|
|
|
GST_BASE_PARSE_LOCK (parse);
|
|
parse->priv->min_frame_size = min_size;
|
|
GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
|
|
GST_BASE_PARSE_UNLOCK (parse);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_set_passthrough:
|
|
* @trans: the #GstBaseParse to set
|
|
* @passthrough: boolean indicating passthrough mode.
|
|
*
|
|
* Set passthrough mode for this parser. If operating in passthrough,
|
|
* incoming buffers are pushed through unmodified.
|
|
*/
|
|
void
|
|
gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
|
|
{
|
|
g_return_if_fail (parse != NULL);
|
|
|
|
GST_BASE_PARSE_LOCK (parse);
|
|
parse->priv->passthrough = passthrough;
|
|
GST_LOG_OBJECT (parse, "set passthrough: %d", passthrough);
|
|
GST_BASE_PARSE_UNLOCK (parse);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_set_frame_props:
|
|
* @parse: the #GstBaseParse to set
|
|
* @fps_num: frames per second (numerator).
|
|
* @fps_den: frames per second (denominator).
|
|
* @interval: duration update interval in frames.
|
|
*
|
|
* If frames per second is configured, parser can take care of buffer duration
|
|
* and timestamping. If #interval is non-zero (default), then stream duration
|
|
* is determined based on frame and byte counts, and updated every #interval
|
|
* frames.
|
|
*/
|
|
void
|
|
gst_base_parse_set_frame_props (GstBaseParse * parse, guint fps_num,
|
|
guint fps_den, gint interval)
|
|
{
|
|
g_return_if_fail (parse != NULL);
|
|
|
|
GST_BASE_PARSE_LOCK (parse);
|
|
parse->priv->fps_num = fps_num;
|
|
parse->priv->fps_den = fps_den;
|
|
parse->priv->update_interval = interval;
|
|
if (!fps_num || !fps_den) {
|
|
GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
|
|
fps_num, fps_den);
|
|
fps_num = fps_den = 0;
|
|
interval = 0;
|
|
parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
|
|
} else {
|
|
parse->priv->frame_duration =
|
|
gst_util_uint64_scale (GST_SECOND, parse->priv->fps_den,
|
|
parse->priv->fps_num);
|
|
}
|
|
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 update interval: %d", interval);
|
|
GST_BASE_PARSE_UNLOCK (parse);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_get_sync:
|
|
* @parse: the #GstBaseParse to query
|
|
*
|
|
* Returns: TRUE if parser is considered 'in sync'. That is, frames have been
|
|
* continuously successfully parsed and pushed.
|
|
*/
|
|
gboolean
|
|
gst_base_parse_get_sync (GstBaseParse * parse)
|
|
{
|
|
gboolean ret;
|
|
|
|
g_return_val_if_fail (parse != NULL, FALSE);
|
|
|
|
GST_BASE_PARSE_LOCK (parse);
|
|
/* losing sync is pretty much a discont (and vice versa), no ? */
|
|
ret = !parse->priv->discont;
|
|
GST_BASE_PARSE_UNLOCK (parse);
|
|
|
|
GST_DEBUG_OBJECT (parse, "sync: %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_get_drain:
|
|
* @parse: the #GstBaseParse to query
|
|
*
|
|
* Returns: TRUE if parser is currently 'draining'. That is, leftover data
|
|
* (e.g. in FLUSH or EOS situation) is being parsed.
|
|
*/
|
|
gboolean
|
|
gst_base_parse_get_drain (GstBaseParse * parse)
|
|
{
|
|
gboolean ret;
|
|
|
|
g_return_val_if_fail (parse != NULL, FALSE);
|
|
|
|
GST_BASE_PARSE_LOCK (parse);
|
|
/* losing sync is pretty much a discont (and vice versa), no ? */
|
|
ret = parse->priv->drain;
|
|
GST_BASE_PARSE_UNLOCK (parse);
|
|
|
|
GST_DEBUG_OBJECT (parse, "drain: %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_get_querytypes:
|
|
* @pad: GstPad
|
|
*
|
|
* Returns: A table of #GstQueryType items describing supported query types.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_query:
|
|
* @pad: #GstPad.
|
|
* @query: #GstQuery.
|
|
*
|
|
* Returns: TRUE on success.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
GstBaseParse *parse;
|
|
GstBaseParseClass *klass;
|
|
gboolean res = FALSE;
|
|
|
|
parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
|
|
klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
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);
|
|
|
|
g_mutex_lock (parse->parse_lock);
|
|
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;
|
|
}
|
|
g_mutex_unlock (parse->parse_lock);
|
|
|
|
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 */
|
|
g_mutex_lock (parse->parse_lock);
|
|
res = gst_base_parse_convert (parse,
|
|
GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
|
|
g_mutex_unlock (parse->parse_lock);
|
|
}
|
|
}
|
|
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) {
|
|
g_mutex_lock (parse->parse_lock);
|
|
res = gst_base_parse_get_duration (parse, format, &duration);
|
|
g_mutex_unlock (parse->parse_lock);
|
|
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 &&
|
|
parse->priv->seekable > GST_BASE_PARSE_SEEK_NONE) {
|
|
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)) {
|
|
/* TODO maybe also check upstream provides proper duration ? */
|
|
seekable = TRUE;
|
|
if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
|
|
|| duration == -1) {
|
|
seekable = FALSE;
|
|
} else {
|
|
GstQuery *q;
|
|
|
|
q = gst_query_new_seeking (GST_FORMAT_BYTES);
|
|
if (!gst_pad_peer_query (parse->sinkpad, q)) {
|
|
seekable = FALSE;
|
|
} else {
|
|
gst_query_parse_seeking (q, &fmt, &seekable, NULL, NULL);
|
|
}
|
|
GST_LOG_OBJECT (parse, "upstream BYTE handled %d, seekable %d",
|
|
res, seekable);
|
|
gst_query_unref (q);
|
|
}
|
|
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;
|
|
}
|
|
default:
|
|
res = gst_pad_query_default (pad, query);
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_base_parse_handle_seek:
|
|
* @parse: #GstBaseParse.
|
|
* @event: #GstEvent.
|
|
*
|
|
* Returns: TRUE if seek succeeded.
|
|
*/
|
|
static gboolean
|
|
gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
|
|
{
|
|
GstBaseParseClass *klass;
|
|
gdouble rate;
|
|
GstFormat format;
|
|
GstSeekFlags flags;
|
|
GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
|
|
gboolean flush, update, res = TRUE;
|
|
gint64 cur, stop, seekpos;
|
|
GstSegment seeksegment = { 0, };
|
|
GstFormat dstformat;
|
|
|
|
klass = GST_BASE_PARSE_GET_CLASS (parse);
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags,
|
|
&cur_type, &cur, &stop_type, &stop);
|
|
|
|
GST_DEBUG_OBJECT (parse, "seek to format %s, "
|
|
"start type %d at %" GST_TIME_FORMAT ", end type %d at %"
|
|
GST_TIME_FORMAT, gst_format_get_name (format),
|
|
cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
|
|
|
|
/* no negative rates yet */
|
|
if (rate < 0.0)
|
|
goto negative_rate;
|
|
|
|
if (cur_type != GST_SEEK_TYPE_SET)
|
|
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 */
|
|
return FALSE;
|
|
} else {
|
|
gst_event_ref (event);
|
|
if (gst_pad_push_event (parse->sinkpad, event)) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/* too much estimating going on to support this sensibly,
|
|
* and no eos/end-of-segment loop handling either ... */
|
|
if ((stop_type == GST_SEEK_TYPE_SET && stop != GST_CLOCK_TIME_NONE) ||
|
|
(stop_type != GST_SEEK_TYPE_NONE && stop_type != GST_SEEK_TYPE_SET) ||
|
|
(flags & GST_SEEK_FLAG_SEGMENT))
|
|
goto wrong_type;
|
|
stop = -1;
|
|
|
|
/* 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);
|
|
|
|
/* figure out the last position we need to play. If it's configured (stop !=
|
|
* -1), use that, else we play until the total duration of the file */
|
|
if ((stop = seeksegment.stop) == -1)
|
|
stop = seeksegment.duration;
|
|
|
|
dstformat = GST_FORMAT_BYTES;
|
|
if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.last_stop,
|
|
&dstformat, &seekpos)) {
|
|
GST_DEBUG_OBJECT (parse, "conversion failed");
|
|
return FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (parse,
|
|
"seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT, cur,
|
|
seekpos);
|
|
|
|
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 ());
|
|
}
|
|
} 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 ());
|
|
} else {
|
|
if (parse->close_segment)
|
|
gst_event_unref (parse->close_segment);
|
|
|
|
parse->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->pending_segment)
|
|
gst_event_unref (parse->pending_segment);
|
|
|
|
/* This will be sent later in _loop() */
|
|
parse->pending_segment =
|
|
gst_event_new_new_segment (FALSE, parse->segment.rate,
|
|
parse->segment.format,
|
|
parse->segment.last_stop, stop, parse->segment.last_stop);
|
|
|
|
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.last_stop),
|
|
GST_TIME_ARGS (stop), GST_TIME_ARGS (parse->segment.last_stop));
|
|
|
|
/* 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->discont = TRUE;
|
|
parse->priv->next_ts = parse->segment.last_stop;
|
|
parse->priv->sync_offset = seekpos;
|
|
}
|
|
|
|
/* Start streaming thread if paused */
|
|
gst_pad_start_task (parse->sinkpad,
|
|
(GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
|
|
|
|
GST_PAD_STREAM_UNLOCK (parse->sinkpad);
|
|
} else {
|
|
GstEvent *new_event;
|
|
/* 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");
|
|
new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flush,
|
|
GST_SEEK_TYPE_SET, seekpos, stop_type, stop);
|
|
|
|
res = gst_pad_push_event (parse->sinkpad, new_event);
|
|
}
|
|
|
|
done:
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
negative_rate:
|
|
{
|
|
GST_DEBUG_OBJECT (parse, "negative playback rates are not supported yet.");
|
|
res = FALSE;
|
|
goto done;
|
|
}
|
|
wrong_type:
|
|
{
|
|
GST_DEBUG_OBJECT (parse, "unsupported seek type.");
|
|
res = FALSE;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_handle_tag:
|
|
* @parse: #GstBaseParse.
|
|
* @event: #GstEvent.
|
|
*
|
|
* 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))
|
|
parse->priv->post_min_bitrate = FALSE;
|
|
if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp))
|
|
parse->priv->post_avg_bitrate = FALSE;
|
|
if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp))
|
|
parse->priv->post_max_bitrate = FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_base_parse_sink_setcaps:
|
|
* @pad: #GstPad.
|
|
* @caps: #GstCaps.
|
|
*
|
|
* Returns: TRUE if caps were accepted.
|
|
*/
|
|
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 && gst_pad_set_caps (pad, caps);
|
|
}
|
|
|
|
static void
|
|
gst_base_parse_set_index (GstElement * element, GstIndex * index)
|
|
{
|
|
GstBaseParse *parse = GST_BASE_PARSE (element);
|
|
|
|
GST_OBJECT_LOCK (parse);
|
|
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 (element),
|
|
&parse->priv->index_id);
|
|
parse->priv->own_index = FALSE;
|
|
} else
|
|
parse->priv->index = NULL;
|
|
GST_OBJECT_UNLOCK (parse);
|
|
}
|
|
|
|
static GstIndex *
|
|
gst_base_parse_get_index (GstElement * element)
|
|
{
|
|
GstBaseParse *parse = GST_BASE_PARSE (element);
|
|
GstIndex *result = NULL;
|
|
|
|
GST_OBJECT_LOCK (parse);
|
|
if (parse->priv->index)
|
|
result = gst_object_ref (parse->priv->index);
|
|
GST_OBJECT_UNLOCK (parse);
|
|
|
|
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 */
|
|
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;
|
|
}
|
|
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;
|
|
}
|