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If the bitrates for all but one audio/video streams are known, and the total stream size and duration can be determined, this calculates the unkown bitrate as (stream size / duration) - (sum of known bitrates). While this is not guaranteed to be very accurate, it should be good enough for most purposes. For example, this is useful for H.263 + AAC streams where no 'btrt' atom is available for the video portion. https://bugzilla.gnome.org/show_bug.cgi?id=619548
122 lines
3 KiB
C
122 lines
3 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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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G_BEGIN_DECLS
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GST_DEBUG_CATEGORY_EXTERN (qtdemux_debug);
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#define GST_CAT_DEFAULT qtdemux_debug
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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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#define GST_QTDEMUX_MAX_STREAMS 8
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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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struct _GstQTDemux {
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GstElement element;
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/* pads */
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GstPad *sinkpad;
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QtDemuxStream *streams[GST_QTDEMUX_MAX_STREAMS];
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gint n_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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guint major_brand;
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GstBuffer *comp_brands;
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GNode *moov_node;
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GNode *moov_node_compressed;
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guint32 timescale;
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guint64 duration;
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gboolean fragmented;
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/* offset of the mfra atom */
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guint64 mfra_offset;
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guint64 moof_offset;
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gint state;
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gboolean pullbased;
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gboolean posted_redirect;
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/* push based variables */
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guint neededbytes;
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guint todrop;
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GstAdapter *adapter;
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GstBuffer *mdatbuffer;
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guint64 mdatleft;
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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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guint64 first_mdat;
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gboolean got_moov;
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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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gboolean segment_running;
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GstEvent *pending_newsegment;
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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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gint64 requested_seek_time;
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guint64 seek_offset;
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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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