/* GStreamer * Copyright (C) 2004 Wim Taymans * * gstoggdemux.c: ogg stream demuxer * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifndef __GST_OGG_DEMUX_H__ #define __GST_OGG_DEMUX_H__ #include #include #include "gstoggstream.h" G_BEGIN_DECLS #define GST_TYPE_OGG_PAD (gst_ogg_pad_get_type()) #define GST_OGG_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_PAD, GstOggPad)) #define GST_OGG_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_PAD, GstOggPad)) #define GST_IS_OGG_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_PAD)) #define GST_IS_OGG_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_PAD)) typedef struct _GstOggPad GstOggPad; typedef struct _GstOggPadClass GstOggPadClass; #define GST_TYPE_OGG_DEMUX (gst_ogg_demux_get_type()) #define GST_OGG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_DEMUX, GstOggDemux)) #define GST_OGG_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_DEMUX, GstOggDemux)) #define GST_IS_OGG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_DEMUX)) #define GST_IS_OGG_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_DEMUX)) GType gst_ogg_demux_get_type (void); typedef struct _GstOggDemux GstOggDemux; typedef struct _GstOggDemuxClass GstOggDemuxClass; typedef struct _GstOggChain GstOggChain; /* all information needed for one ogg chain (relevant for chained bitstreams) */ struct _GstOggChain { GstOggDemux *ogg; gint64 offset; /* starting offset of chain */ gint64 end_offset; /* end offset of chain */ gint64 bytes; /* number of bytes */ gboolean have_bos; GArray *streams; GstClockTime total_time; /* the total time of this chain, this is the MAX of the totals of all streams */ GstClockTime begin_time; /* when this chain starts in the stream */ GstClockTime segment_start; /* the timestamp of the first sample, this is the MIN of the start times of all streams. */ GstClockTime segment_stop; /* the timestamp of the last page, this is the MAX of the streams. */ }; /* different modes for the pad */ typedef enum { GST_OGG_PAD_MODE_INIT, /* we are feeding our internal decoder to get info */ GST_OGG_PAD_MODE_STREAMING, /* we are streaming buffers to the outside */ } GstOggPadMode; /* all information needed for one ogg stream */ struct _GstOggPad { GstPad pad; /* subclass GstPad */ gboolean have_type; GstOggPadMode mode; GstOggChain *chain; /* the chain we are part of */ GstOggDemux *ogg; /* the ogg demuxer we are part of */ GstOggStream map; gint64 packetno; gint64 current_granule; gint64 keyframe_granule; GstClockTime start_time; /* the timestamp of the first sample */ gint64 first_granule; /* the granulepos of first page == first sample in next page */ GstClockTime first_time; /* the timestamp of the second page or granuletime of first page */ GstClockTime position; /* position when last push occured; used to detect when we * need to send a newsegment update event for sparse streams */ GList *continued; gboolean discont; GstFlowReturn last_ret; /* last return of _pad_push() */ gboolean is_eos; gboolean added; /* push mode seeking */ GstClockTime push_kf_time; GstClockTime push_sync_time; }; struct _GstOggPadClass { GstPadClass parent_class; }; /** * GstOggDemux: * * The ogg demuxer object structure. */ struct _GstOggDemux { GstElement element; GstPad *sinkpad; gint64 length; gint64 read_offset; gint64 offset; gboolean pullmode; gboolean running; gboolean need_chains; gboolean resync; /* keep track of how large pages and packets are, useful for skewing when seeking */ guint64 max_packet_size, max_page_size; /* state */ GMutex *chain_lock; /* we need the lock to protect the chains */ GArray *chains; /* list of chains we know */ GstClockTime total_time; gint bitrate; /* bitrate of the current chain */ GstOggChain *current_chain; GstOggChain *building_chain; /* playback start/stop positions */ GstSegment segment; guint32 seqnum; GstEvent *event; GstEvent *newsegment; /* pending newsegment to be sent from _loop */ /* annodex stuff */ gint64 basetime; gint64 prestime; /* push mode seeking support */ GMutex *push_lock; /* we need the lock to protect the push mode variables */ gint64 push_byte_offset; /* where were are at in the stream, in bytes */ gint64 push_byte_length; /* length in bytes of the stream, -1 if unknown */ GstClockTime push_time_length; /* length in time of the stream */ GstClockTime push_start_time; /* start time of the stream */ GstClockTime push_time_offset; /* where were are at in the stream, in time */ enum { PUSH_PLAYING, PUSH_DURATION, PUSH_BISECT1, PUSH_LINEAR1, PUSH_BISECT2, PUSH_LINEAR2 } push_state; GstClockTime push_seek_time_original_target; GstClockTime push_seek_time_target; gint64 push_last_seek_offset; GstClockTime push_last_seek_time; gint64 push_offset0, push_offset1; /* bisection search offset bounds */ GstClockTime push_time0, push_time1; /* bisection search time bounds */ double push_seek_rate; GstSeekFlags push_seek_flags; GstEvent *push_mode_seek_delayed_event; gboolean push_disable_seeking; gboolean seek_secant; gboolean seek_undershot; GstClockTime push_prev_seek_time; gint push_bisection_steps[2]; gint stats_bisection_steps[2]; gint stats_bisection_max_steps[2]; gint stats_nbisections; /* ogg stuff */ ogg_sync_state sync; }; struct _GstOggDemuxClass { GstElementClass parent_class; }; gboolean gst_ogg_demux_plugin_init (GstPlugin * plugin); G_END_DECLS #endif /* __GST_OGG_DEMUX_H__ */