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177 lines
5.2 KiB
C
177 lines
5.2 KiB
C
/* GStreamer
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* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
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*
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* gstoggdemux.c: ogg stream demuxer
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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_OGG_DEMUX_H__
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#define __GST_OGG_DEMUX_H__
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#include <ogg/ogg.h>
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#include <gst/gst.h>
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#include "gstoggstream.h"
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G_BEGIN_DECLS
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#define GST_TYPE_OGG_PAD (gst_ogg_pad_get_type())
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#define GST_OGG_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_PAD, GstOggPad))
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#define GST_OGG_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_PAD, GstOggPad))
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#define GST_IS_OGG_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_PAD))
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#define GST_IS_OGG_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_PAD))
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typedef struct _GstOggPad GstOggPad;
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typedef struct _GstOggPadClass GstOggPadClass;
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#define GST_TYPE_OGG_DEMUX (gst_ogg_demux_get_type())
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#define GST_OGG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_DEMUX, GstOggDemux))
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#define GST_OGG_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_DEMUX, GstOggDemux))
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#define GST_IS_OGG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_DEMUX))
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#define GST_IS_OGG_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_DEMUX))
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GType gst_ogg_demux_get_type (void);
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typedef struct _GstOggDemux GstOggDemux;
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typedef struct _GstOggDemuxClass GstOggDemuxClass;
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typedef struct _GstOggChain GstOggChain;
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/* all information needed for one ogg chain (relevant for chained bitstreams) */
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struct _GstOggChain
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{
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GstOggDemux *ogg;
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gint64 offset; /* starting offset of chain */
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gint64 end_offset; /* end offset of chain */
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gint64 bytes; /* number of bytes */
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gboolean have_bos;
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GArray *streams;
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GstClockTime total_time; /* the total time of this chain, this is the MAX of
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the totals of all streams */
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GstClockTime begin_time; /* when this chain starts in the stream */
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GstClockTime segment_start; /* the timestamp of the first sample, this is the MIN of
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the start times of all streams. */
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GstClockTime segment_stop; /* the timestamp of the last page, this is the MAX of the
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streams. */
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};
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/* different modes for the pad */
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typedef enum
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{
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GST_OGG_PAD_MODE_INIT, /* we are feeding our internal decoder to get info */
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GST_OGG_PAD_MODE_STREAMING, /* we are streaming buffers to the outside */
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} GstOggPadMode;
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/* all information needed for one ogg stream */
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struct _GstOggPad
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{
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GstPad pad; /* subclass GstPad */
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gboolean have_type;
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GstOggPadMode mode;
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GstOggChain *chain; /* the chain we are part of */
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GstOggDemux *ogg; /* the ogg demuxer we are part of */
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GstOggStream map;
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gint64 packetno;
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gint64 current_granule;
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gint64 keyframe_granule;
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GstClockTime start_time; /* the timestamp of the first sample */
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gint64 first_granule; /* the granulepos of first page == first sample in next page */
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GstClockTime first_time; /* the timestamp of the second page or granuletime of first page */
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GstClockTime position; /* position when last push occured; used to detect when we
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* need to send a newsegment update event for sparse streams */
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GList *continued;
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gboolean discont;
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GstFlowReturn last_ret; /* last return of _pad_push() */
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gboolean is_eos;
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gboolean added;
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};
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struct _GstOggPadClass
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{
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GstPadClass parent_class;
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};
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/**
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* GstOggDemux:
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*
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* The ogg demuxer object structure.
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*/
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struct _GstOggDemux
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{
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GstElement element;
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GstPad *sinkpad;
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gint64 length;
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gint64 read_offset;
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gint64 offset;
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gboolean pullmode;
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gboolean running;
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gboolean need_chains;
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gboolean resync;
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/* state */
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GMutex *chain_lock; /* we need the lock to protect the chains */
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GArray *chains; /* list of chains we know */
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GstClockTime total_time;
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gint bitrate; /* bitrate of the current chain */
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GstOggChain *current_chain;
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GstOggChain *building_chain;
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/* playback start/stop positions */
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GstSegment segment;
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guint32 seqnum;
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GstEvent *event;
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GstEvent *newsegment; /* pending newsegment to be sent from _loop */
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/* annodex stuff */
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gint64 basetime;
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gint64 prestime;
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/* ogg stuff */
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ogg_sync_state sync;
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};
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struct _GstOggDemuxClass
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{
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GstElementClass parent_class;
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};
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gboolean gst_ogg_demux_plugin_init (GstPlugin * plugin);
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G_END_DECLS
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#endif /* __GST_OGG_DEMUX_H__ */
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