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5fde140e6e
When the seek event contains a (newly-added) trickmode interval, and TRICKMODE_KEY_UNITS was requested, only let through keyframes separated with the required interval
266 lines
8.5 KiB
C
266 lines
8.5 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_QTDEMUX_H__
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#define __GST_QTDEMUX_H__
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include <gst/base/gstflowcombiner.h>
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#include "gstisoff.h"
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G_BEGIN_DECLS
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#define GST_TYPE_QTDEMUX \
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(gst_qtdemux_get_type())
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#define GST_QTDEMUX(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QTDEMUX,GstQTDemux))
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#define GST_QTDEMUX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QTDEMUX,GstQTDemuxClass))
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#define GST_IS_QTDEMUX(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QTDEMUX))
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#define GST_IS_QTDEMUX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QTDEMUX))
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#define GST_QTDEMUX_CAST(obj) ((GstQTDemux *)(obj))
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/* qtdemux produces these for atoms it cannot parse */
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#define GST_QT_DEMUX_PRIVATE_TAG "private-qt-tag"
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#define GST_QT_DEMUX_CLASSIFICATION_TAG "classification"
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typedef struct _GstQTDemux GstQTDemux;
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typedef struct _GstQTDemuxClass GstQTDemuxClass;
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typedef struct _QtDemuxStream QtDemuxStream;
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enum QtDemuxState
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{
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QTDEMUX_STATE_INITIAL, /* Initial state (haven't got the header yet) */
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QTDEMUX_STATE_HEADER, /* Parsing the header */
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QTDEMUX_STATE_MOVIE, /* Parsing/Playing the media data */
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QTDEMUX_STATE_BUFFER_MDAT /* Buffering the mdat atom */
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};
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struct _GstQTDemux {
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GstElement element;
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/* Global state */
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enum QtDemuxState state;
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/* static sink pad */
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GstPad *sinkpad;
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/* TRUE if pull-based */
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gboolean pullbased;
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gboolean posted_redirect;
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/* Protect pad exposing from flush event */
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GMutex expose_lock;
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/* list of QtDemuxStream */
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GPtrArray *active_streams;
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GPtrArray *old_streams;
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gint n_video_streams;
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gint n_audio_streams;
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gint n_sub_streams;
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GstFlowCombiner *flowcombiner;
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/* Incoming stream group-id to set on downstream STREAM_START events.
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* If upstream doesn't contain one, a global one will be generated */
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gboolean have_group_id;
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guint group_id;
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guint major_brand;
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GstBuffer *comp_brands;
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/* [moov] header.
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* FIXME : This is discarded just after it's created. Just move it
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* to a temporary variable ? */
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GNode *moov_node;
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/* FIXME : This is never freed. It is only assigned once. memleak ? */
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GNode *moov_node_compressed;
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/* Set to TRUE when the [moov] header has been fully parsed */
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gboolean got_moov;
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/* Global timescale for the incoming stream. Use the QTTIME macros
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* to convert values to/from GstClockTime */
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guint32 timescale;
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/* Global duration (in global timescale). Use QTTIME macros to get GstClockTime */
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guint64 duration;
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/* Total size of header atoms. Used to calculate fallback overall bitrate */
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guint header_size;
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GstTagList *tag_list;
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/* configured playback region */
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GstSegment segment;
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/* State for key_units trickmode */
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GstClockTime trickmode_interval;
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/* PUSH-BASED only: If the initial segment event, or a segment consequence of
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* a seek or incoming TIME segment from upstream needs to be pushed. This
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* variable is used instead of pushing the event directly because at that
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* point we may not have yet emitted the srcpads. */
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gboolean need_segment;
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guint32 segment_seqnum;
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/* flag to indicate that we're working with a smoothstreaming fragment
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* Mss doesn't have 'moov' or any information about the streams format,
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* requiring qtdemux to expose and create the streams */
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gboolean mss_mode;
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/* Set to TRUE if the incoming stream is either a MSS stream or
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* a Fragmented MP4 (containing the [mvex] atom in the header) */
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gboolean fragmented;
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/* PULL-BASED only : If TRUE there is a pending seek */
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gboolean fragmented_seek_pending;
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/* PULL-BASED : offset of first [moof] or of fragment to seek to
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* PUSH-BASED : offset of latest [moof] */
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guint64 moof_offset;
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/* MSS streams have a single media that is unspecified at the atoms, so
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* upstream provides it at the caps */
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GstCaps *media_caps;
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/* Set to TRUE when all streams have been exposed */
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gboolean exposed;
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gint64 chapters_track_id;
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/* protection support */
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GPtrArray *protection_system_ids; /* Holds identifiers of all content protection systems for all tracks */
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GQueue protection_event_queue; /* holds copy of upstream protection events */
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guint64 cenc_aux_info_offset;
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guint8 *cenc_aux_info_sizes;
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guint32 cenc_aux_sample_count;
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gchar *preferred_protection_system_id;
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/* Whether the parent bin is streams-aware, meaning we can
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* add/remove streams at any point in time */
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gboolean streams_aware;
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/*
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* ALL VARIABLES BELOW ARE ONLY USED IN PUSH-BASED MODE
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*/
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GstAdapter *adapter;
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guint neededbytes;
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guint todrop;
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/* Used to store data if [mdat] is before the headers */
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GstBuffer *mdatbuffer;
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/* Amount of bytes left to read in the current [mdat] */
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guint64 mdatleft, mdatsize;
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/* When restoring the mdat to the adapter, this buffer stores any
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* trailing data that was after the last atom parsed as it has to be
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* restored later along with the correct offset. Used in fragmented
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* scenario where mdat/moof are one after the other in any order.
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*
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* Check https://bugzilla.gnome.org/show_bug.cgi?id=710623 */
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GstBuffer *restoredata_buffer;
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guint64 restoredata_offset;
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/* The current offset in bytes from upstream.
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* Note: While it makes complete sense when we are PULL-BASED (pulling
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* in BYTES from upstream) and PUSH-BASED with a BYTE SEGMENT (receiving
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* buffers with actual offsets), it is undefined in PUSH-BASED with a
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* TIME SEGMENT */
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guint64 offset;
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/* offset of the mdat atom */
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guint64 mdatoffset;
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/* Offset of the first mdat */
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guint64 first_mdat;
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/* offset of last [moov] seen */
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guint64 last_moov_offset;
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/* If TRUE, qtdemux received upstream newsegment in TIME format
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* which likely means that upstream is driving the pipeline (such as
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* adaptive demuxers or dlna sources) */
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gboolean upstream_format_is_time;
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/* Seqnum of the seek event sent upstream. Will be used to
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* detect incoming FLUSH events corresponding to that */
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guint32 offset_seek_seqnum;
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/* UPSTREAM BYTE: Requested upstream byte seek offset.
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* Currently it is only used to check if an incoming BYTE SEGMENT
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* corresponds to a seek event that was sent upstream */
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gint64 seek_offset;
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/* UPSTREAM BYTE: Requested start/stop TIME values from
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* downstream.
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* Used to set on the downstream segment once the corresponding upstream
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* BYTE SEEK has succeeded */
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gint64 push_seek_start;
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gint64 push_seek_stop;
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#if 0
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/* gst index support */
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GstIndex *element_index;
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gint index_id;
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#endif
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/* Whether upstream is seekable in BYTES */
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gboolean upstream_seekable;
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/* UPSTREAM BYTE: Size of upstream content.
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* Note : This is only computed once ! If upstream grows in the meantime
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* it will not be updated */
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gint64 upstream_size;
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/* UPSTREAM TIME : Contains the PTS (if any) of the
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* buffer that contains a [moof] header. Will be used to establish
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* the actual PTS of the samples contained within that fragment. */
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guint64 fragment_start;
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/* UPSTREAM TIME : The offset in bytes of the [moof]
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* header start.
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* Note : This is not computed from the GST_BUFFER_OFFSET field */
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guint64 fragment_start_offset;
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/* These two fields are used to perform an implicit seek when a fragmented
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* file whose first tfdt is not zero. This way if the first fragment starts
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* at 1 hour, the user does not have to wait 1 hour or perform a manual seek
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* for the image to move and the sound to play.
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*
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* This implicit seek is only done if the first parsed fragment has a non-zero
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* decode base time and a seek has not been received previously, hence these
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* fields. */
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gboolean received_seek;
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gboolean first_moof_already_parsed;
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};
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struct _GstQTDemuxClass {
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GstElementClass parent_class;
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};
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GType gst_qtdemux_get_type (void);
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G_END_DECLS
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#endif /* __GST_QTDEMUX_H__ */
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