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561b9e417d
Original commit message from CVS: 2005-10-31 Michael Smith <msmith@fluendo.com> * ext/ogg/gstoggdemux.c: (gst_ogg_pad_init), (gst_ogg_demux_read_chain), (gst_ogg_demux_read_end_chain), (gst_ogg_demux_collect_chain_info), (gst_ogg_print): Patch from Alessandro Decina <alessandro@nnva.org>. Make oggdemux only find the final time in a chain, not per-pad, since the per-pad information can be very expensive to locate, and it isn't used anywhere. This makes reading a file containing OggSkeleton reasonably fast. Also, make chain finding work when there are logical bitstreams that can't be decoded. Fixes #319110.
2568 lines
69 KiB
C
2568 lines
69 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <ogg/ogg.h>
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#include <string.h>
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#include <gst/gst-i18n-plugin.h>
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#define CHUNKSIZE (8500) /* this is out of vorbisfile */
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enum
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{
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OV_EREAD = -1,
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OV_EFAULT = -2,
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OV_FALSE = -3,
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OV_EOF = -4,
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};
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GST_DEBUG_CATEGORY_STATIC (gst_ogg_demux_debug);
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GST_DEBUG_CATEGORY_STATIC (gst_ogg_demux_setup_debug);
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#define GST_CAT_DEFAULT gst_ogg_demux_debug
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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(obj) (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(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_DEMUX))
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static 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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/* all information needed for one ogg chain (relevant for chained bitstreams) */
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typedef 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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} GstOggChain;
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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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#define PARENT GstPad
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#define PARENTCLASS GstPadClass
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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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PARENT pad; /* subclass GstPad */
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gboolean have_type;
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GstOggPadMode mode;
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GstPad *elem_pad; /* sinkpad of internal element */
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GstElement *element; /* internal element */
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GstPad *elem_out; /* our sinkpad to receive buffers form the internal element */
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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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GList *headers;
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gint serialno;
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gint64 packetno;
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gint64 current_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 */
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ogg_stream_state stream;
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};
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struct _GstOggPadClass
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{
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PARENTCLASS parent_class;
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};
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#define GST_CHAIN_LOCK(ogg) g_mutex_lock((ogg)->chain_lock)
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#define GST_CHAIN_UNLOCK(ogg) g_mutex_unlock((ogg)->chain_lock)
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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 offset;
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gboolean seekable;
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gboolean running;
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gboolean need_chains;
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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; /* the total time of this ogg, this is the sum of
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the totals of all chains */
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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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GstClockTime segment_start;
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GstClockTime segment_stop;
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gboolean segment_play;
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gdouble segment_rate;
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gint64 current_granule;
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GstClockTime current_time;
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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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static GstStaticPadTemplate internaltemplate =
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GST_STATIC_PAD_TEMPLATE ("internal",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static gboolean gst_ogg_demux_collect_chain_info (GstOggDemux * ogg,
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GstOggChain * chain);
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static gboolean gst_ogg_demux_activate_chain (GstOggDemux * ogg,
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GstOggChain * chain, GstEvent * event);
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static gboolean gst_ogg_demux_perform_seek (GstOggDemux * ogg,
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gboolean accurate, gboolean flush);
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static void gst_ogg_pad_class_init (GstOggPadClass * klass);
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static void gst_ogg_pad_init (GstOggPad * pad);
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static void gst_ogg_pad_dispose (GObject * object);
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static void gst_ogg_pad_finalize (GObject * object);
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#if 0
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static const GstFormat *gst_ogg_pad_formats (GstPad * pad);
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static const GstEventMask *gst_ogg_pad_event_masks (GstPad * pad);
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#endif
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static const GstQueryType *gst_ogg_pad_query_types (GstPad * pad);
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static gboolean gst_ogg_pad_src_query (GstPad * pad, GstQuery * query);
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static gboolean gst_ogg_pad_event (GstPad * pad, GstEvent * event);
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static GstCaps *gst_ogg_pad_getcaps (GstPad * pad);
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static GstCaps *gst_ogg_type_find (ogg_packet * packet);
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static GstPadClass *ogg_pad_parent_class = NULL;
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static GType
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gst_ogg_pad_get_type (void)
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{
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static GType ogg_pad_type = 0;
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if (!ogg_pad_type) {
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static const GTypeInfo ogg_pad_info = {
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sizeof (GstOggPadClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_ogg_pad_class_init,
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NULL,
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NULL,
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sizeof (GstOggPad),
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0,
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(GInstanceInitFunc) gst_ogg_pad_init,
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};
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ogg_pad_type =
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g_type_register_static (GST_TYPE_PAD, "GstOggPad", &ogg_pad_info, 0);
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}
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return ogg_pad_type;
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}
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static void
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gst_ogg_pad_class_init (GstOggPadClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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ogg_pad_parent_class = g_type_class_ref (GST_TYPE_PAD);
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gobject_class->dispose = gst_ogg_pad_dispose;
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gobject_class->finalize = gst_ogg_pad_finalize;
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}
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static void
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gst_ogg_pad_init (GstOggPad * pad)
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{
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gst_pad_set_event_function (GST_PAD (pad),
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GST_DEBUG_FUNCPTR (gst_ogg_pad_event));
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gst_pad_set_getcaps_function (GST_PAD (pad),
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GST_DEBUG_FUNCPTR (gst_ogg_pad_getcaps));
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gst_pad_set_query_type_function (GST_PAD (pad),
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GST_DEBUG_FUNCPTR (gst_ogg_pad_query_types));
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gst_pad_set_query_function (GST_PAD (pad),
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GST_DEBUG_FUNCPTR (gst_ogg_pad_src_query));
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pad->mode = GST_OGG_PAD_MODE_INIT;
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pad->first_granule = -1;
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pad->current_granule = -1;
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pad->start_time = GST_CLOCK_TIME_NONE;
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pad->first_time = GST_CLOCK_TIME_NONE;
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pad->have_type = FALSE;
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pad->headers = NULL;
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}
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static void
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gst_ogg_pad_dispose (GObject * object)
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{
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GstOggPad *pad = GST_OGG_PAD (object);
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if (pad->element)
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gst_element_set_state (pad->element, GST_STATE_NULL);
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gst_object_replace ((GstObject **) (&pad->elem_pad), NULL);
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gst_object_replace ((GstObject **) (&pad->element), NULL);
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gst_object_replace ((GstObject **) (&pad->elem_out), NULL);
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pad->chain = NULL;
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pad->ogg = NULL;
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g_list_foreach (pad->headers, (GFunc) gst_mini_object_unref, NULL);
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g_list_free (pad->headers);
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pad->headers = NULL;
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ogg_stream_reset (&pad->stream);
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G_OBJECT_CLASS (ogg_pad_parent_class)->dispose (object);
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}
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static void
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gst_ogg_pad_finalize (GObject * object)
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{
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GstOggPad *pad = GST_OGG_PAD (object);
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ogg_stream_clear (&pad->stream);
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G_OBJECT_CLASS (ogg_pad_parent_class)->finalize (object);
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}
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#if 0
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static const GstFormat *
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gst_ogg_pad_formats (GstPad * pad)
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{
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static GstFormat src_formats[] = {
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GST_FORMAT_DEFAULT, /* time */
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GST_FORMAT_TIME, /* granulepos */
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0
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};
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static GstFormat sink_formats[] = {
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GST_FORMAT_BYTES,
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GST_FORMAT_DEFAULT, /* bytes */
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0
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};
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return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
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}
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#endif
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#if 0
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static const GstEventMask *
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gst_ogg_pad_event_masks (GstPad * pad)
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{
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static const GstEventMask src_event_masks[] = {
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{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
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{0,}
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};
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return src_event_masks;
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}
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#endif
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static const GstQueryType *
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gst_ogg_pad_query_types (GstPad * pad)
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{
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static const GstQueryType query_types[] = {
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GST_QUERY_POSITION,
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0
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};
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return query_types;
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}
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static GstCaps *
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gst_ogg_pad_getcaps (GstPad * pad)
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{
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return gst_caps_ref (GST_PAD_CAPS (pad));
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}
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static gboolean
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gst_ogg_pad_src_query (GstPad * pad, GstQuery * query)
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{
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gboolean res = TRUE;
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GstOggDemux *ogg;
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GstOggPad *cur;
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ogg = GST_OGG_DEMUX (GST_PAD_PARENT (pad));
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cur = GST_OGG_PAD (pad);
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_DURATION:
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{
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GstFormat format;
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gst_query_parse_duration (query, &format, NULL);
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/* can only get position in time */
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if (format != GST_FORMAT_TIME) {
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GST_DEBUG ("only query duration on TIME is supported");
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res = FALSE;
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goto done;
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}
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/* can only return the total time position */
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gst_query_set_duration (query, GST_FORMAT_TIME, ogg->total_time);
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break;
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}
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case GST_QUERY_CONVERT:
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/* hmm .. */
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res = FALSE;
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break;
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default:
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res = FALSE;
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break;
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}
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done:
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return res;
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}
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static gboolean
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gst_ogg_pad_event (GstPad * pad, GstEvent * event)
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{
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gboolean res;
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GstOggDemux *ogg;
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GstOggPad *cur;
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ogg = GST_OGG_DEMUX (GST_PAD_PARENT (pad));
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cur = GST_OGG_PAD (pad);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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{
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gboolean running;
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gboolean flush, accurate;
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GstFormat format;
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gdouble rate;
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GstSeekFlags flags;
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GstSeekType cur_type, stop_type;
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gint64 cur, stop;
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/* can't seek if we are not seekable, FIXME could pass the
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* seek query upstream after converting it to bytes using
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* the average bitrate of the stream. */
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if (!ogg->seekable) {
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GST_DEBUG ("seek on non seekable stream");
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goto error;
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}
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gst_event_parse_seek (event, &rate, &format, &flags,
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&cur_type, &cur, &stop_type, &stop);
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/* we can only seek on time */
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if (format != GST_FORMAT_TIME) {
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GST_DEBUG ("can only seek on TIME");
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goto error;
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}
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/* cannot yet do backwards playback */
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if (rate <= 0.0) {
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GST_DEBUG ("can only seek with positive rate");
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goto error;
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}
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/* store start and stop values */
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GST_LOCK (ogg);
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if (cur_type == GST_SEEK_TYPE_SET)
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ogg->segment_start = cur;
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else if (cur_type == GST_SEEK_TYPE_CUR)
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ogg->segment_start += cur;
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|
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if (stop_type != GST_SEEK_TYPE_NONE)
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ogg->segment_stop = stop;
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else if (stop_type == GST_SEEK_TYPE_CUR)
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ogg->segment_stop += cur;
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|
|
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ogg->segment_rate = rate;
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ogg->segment_play = !!(flags & GST_SEEK_FLAG_SEGMENT);
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flush = (flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH;
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accurate = (flags & GST_SEEK_FLAG_ACCURATE) == GST_SEEK_FLAG_ACCURATE;
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gst_event_unref (event);
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GST_DEBUG ("segment positions set to %" GST_TIME_FORMAT "-%"
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GST_TIME_FORMAT, GST_TIME_ARGS (ogg->segment_start),
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GST_TIME_ARGS (ogg->segment_stop));
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|
|
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/* check if we can do the seek now */
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running = ogg->running;
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GST_UNLOCK (ogg);
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|
|
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/* now do the seek */
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if (running) {
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res = gst_ogg_demux_perform_seek (ogg, accurate, flush);
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} else
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res = TRUE;
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|
break;
|
|
}
|
|
default:
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res = gst_pad_event_default (pad, event);
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break;
|
|
}
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|
return res;
|
|
|
|
error:
|
|
GST_DEBUG ("error handling event");
|
|
gst_event_unref (event);
|
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return FALSE;
|
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}
|
|
|
|
static void
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gst_ogg_pad_reset (GstOggPad * pad)
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{
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ogg_stream_reset (&pad->stream);
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|
/* FIXME: need a discont here */
|
|
}
|
|
|
|
/* the filter function for selecting the elements we can use in
|
|
* autoplugging */
|
|
static gboolean
|
|
gst_ogg_demux_factory_filter (GstPluginFeature * feature, GstCaps * caps)
|
|
{
|
|
guint rank;
|
|
const gchar *klass;
|
|
|
|
/* we only care about element factories */
|
|
if (!GST_IS_ELEMENT_FACTORY (feature))
|
|
return FALSE;
|
|
|
|
klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
|
|
/* only demuxers and decoders can play */
|
|
if (strstr (klass, "Demux") == NULL &&
|
|
strstr (klass, "Decoder") == NULL && strstr (klass, "Parse") == NULL) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* only select elements with autoplugging rank */
|
|
rank = gst_plugin_feature_get_rank (feature);
|
|
if (rank < GST_RANK_MARGINAL)
|
|
return FALSE;
|
|
|
|
GST_DEBUG ("checking factory %s", GST_PLUGIN_FEATURE_NAME (feature));
|
|
/* now see if it is compatible with the caps */
|
|
{
|
|
GstElementFactory *factory = GST_ELEMENT_FACTORY (feature);
|
|
const GList *templates;
|
|
GList *walk;
|
|
|
|
/* get the templates from the element factory */
|
|
templates = gst_element_factory_get_static_pad_templates (factory);
|
|
|
|
for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
|
|
GstStaticPadTemplate *templ = walk->data;
|
|
|
|
/* we only care about the sink templates */
|
|
if (templ->direction == GST_PAD_SINK) {
|
|
GstCaps *intersect;
|
|
GstCaps *scaps;
|
|
gboolean empty;
|
|
|
|
/* try to intersect the caps with the caps of the template */
|
|
scaps = gst_static_caps_get (&templ->static_caps);
|
|
intersect = gst_caps_intersect (caps, scaps);
|
|
gst_caps_unref (scaps);
|
|
|
|
empty = gst_caps_is_empty (intersect);
|
|
gst_caps_unref (intersect);
|
|
|
|
/* check if the intersection is empty */
|
|
if (!empty) {
|
|
/* non empty intersection, we can use this element */
|
|
goto found;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return FALSE;
|
|
|
|
found:
|
|
return TRUE;
|
|
}
|
|
|
|
/* function used to sort element features */
|
|
static gint
|
|
compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
|
|
{
|
|
gint diff;
|
|
|
|
diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
|
|
if (diff != 0)
|
|
return diff;
|
|
return strcmp (gst_plugin_feature_get_name (f2),
|
|
gst_plugin_feature_get_name (f1));
|
|
}
|
|
|
|
/* function called by the internal decoder elements when it outputs
|
|
* a buffer. We use it to get the first timestamp of the stream
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_pad_internal_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstOggPad *oggpad;
|
|
GstOggDemux *ogg;
|
|
GstClockTime timestamp;
|
|
|
|
oggpad = gst_pad_get_element_private (pad);
|
|
ogg = GST_OGG_DEMUX (oggpad->ogg);
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
GST_DEBUG_OBJECT (oggpad, "received buffer from iternal pad, TS=%lld",
|
|
timestamp);
|
|
|
|
if (oggpad->start_time == GST_CLOCK_TIME_NONE) {
|
|
oggpad->start_time = timestamp;
|
|
ogg->current_time = timestamp;
|
|
}
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* runs typefind on the packet, which is assumed to be the first
|
|
* packet in the stream.
|
|
*
|
|
* Based on the type returned from the typefind function, an element
|
|
* is created to help in conversion between granulepos and timestamps
|
|
* so that we can do decent seeking.
|
|
*/
|
|
static gboolean
|
|
gst_ogg_pad_typefind (GstOggPad * pad, ogg_packet * packet)
|
|
{
|
|
GstCaps *caps;
|
|
GstElement *element = NULL;
|
|
GstOggDemux *ogg = pad->ogg;
|
|
|
|
if (GST_PAD_CAPS (pad) != NULL)
|
|
return TRUE;
|
|
|
|
caps = gst_ogg_type_find (packet);
|
|
|
|
if (caps == NULL) {
|
|
GST_WARNING_OBJECT (ogg,
|
|
"couldn't find caps for stream with serial %08lx", pad->serialno);
|
|
caps = gst_caps_new_simple ("application/octet-stream", NULL);
|
|
} else {
|
|
/* ogg requires you to use a decoder element to define the
|
|
* meaning of granulepos etc so we make one. We also do this if
|
|
* we are in the streaming mode to calculate the first timestamp. */
|
|
GList *factories;
|
|
|
|
/* first filter out the interesting element factories */
|
|
factories = gst_default_registry_feature_filter (
|
|
(GstPluginFeatureFilter) gst_ogg_demux_factory_filter, FALSE, caps);
|
|
|
|
/* sort them according to their ranks */
|
|
factories = g_list_sort (factories, (GCompareFunc) compare_ranks);
|
|
|
|
/* then pick the first factory to create an element */
|
|
if (factories) {
|
|
element =
|
|
gst_element_factory_create (GST_ELEMENT_FACTORY (factories->data),
|
|
NULL);
|
|
if (element) {
|
|
/* this is ours */
|
|
gst_object_ref (element);
|
|
gst_object_sink (GST_OBJECT (element));
|
|
|
|
/* FIXME, it might not be named "sink" */
|
|
pad->elem_pad = gst_element_get_pad (element, "sink");
|
|
gst_element_set_state (element, GST_STATE_PAUSED);
|
|
pad->elem_out =
|
|
gst_pad_new_from_template (gst_static_pad_template_get
|
|
(&internaltemplate), "internal");
|
|
gst_pad_set_chain_function (pad->elem_out, gst_ogg_pad_internal_chain);
|
|
gst_pad_set_element_private (pad->elem_out, pad);
|
|
gst_pad_set_active (pad->elem_out, TRUE);
|
|
|
|
/* and this pad may not be named src.. */
|
|
{
|
|
GstPad *p;
|
|
|
|
p = gst_element_get_pad (element, "src");
|
|
gst_pad_link (p, pad->elem_out);
|
|
gst_object_unref (p);
|
|
}
|
|
}
|
|
}
|
|
g_list_free (factories);
|
|
}
|
|
pad->element = element;
|
|
|
|
gst_pad_set_caps (GST_PAD (pad), caps);
|
|
gst_caps_unref (caps);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* send packet to internal element */
|
|
static GstFlowReturn
|
|
gst_ogg_demux_chain_elem_pad (GstOggPad * pad, ogg_packet * packet)
|
|
{
|
|
GstBuffer *buf;
|
|
GstFlowReturn ret;
|
|
GstOggDemux *ogg = pad->ogg;
|
|
|
|
/* initialize our internal decoder with packets */
|
|
if (!pad->elem_pad)
|
|
goto no_decoder;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "%p init decoder serial %08lx", pad, pad->serialno);
|
|
|
|
buf = gst_buffer_new_and_alloc (packet->bytes);
|
|
memcpy (GST_BUFFER_DATA (buf), packet->packet, packet->bytes);
|
|
gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));
|
|
GST_BUFFER_OFFSET (buf) = -1;
|
|
GST_BUFFER_OFFSET_END (buf) = packet->granulepos;
|
|
|
|
ret = gst_pad_chain (pad->elem_pad, buf);
|
|
if (GST_FLOW_IS_FATAL (ret))
|
|
goto decoder_error;
|
|
|
|
return ret;
|
|
|
|
no_decoder:
|
|
{
|
|
GST_WARNING_OBJECT (ogg,
|
|
"pad %08lx does not have elem_pad, no decoder ?", pad);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
decoder_error:
|
|
{
|
|
GST_WARNING_OBJECT (ogg, "internal decoder error");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* queue data */
|
|
static GstFlowReturn
|
|
gst_ogg_demux_queue_data (GstOggPad * pad, ogg_packet * packet)
|
|
{
|
|
GstBuffer *buf;
|
|
GstOggDemux *ogg = pad->ogg;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "%p queueing data serial %08lx", pad, pad->serialno);
|
|
|
|
buf = gst_buffer_new_and_alloc (packet->bytes);
|
|
memcpy (buf->data, packet->packet, packet->bytes);
|
|
GST_BUFFER_OFFSET (buf) = -1;
|
|
GST_BUFFER_OFFSET_END (buf) = packet->granulepos;
|
|
pad->headers = g_list_append (pad->headers, buf);
|
|
|
|
/* we are ok now */
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_pad_query_convert (GstOggPad * ogg_pad, GstFormat from_format,
|
|
gint64 from_value, GstFormat * to_format, gint64 * to_value)
|
|
{
|
|
if (from_value == -1) {
|
|
*to_value = -1;
|
|
return TRUE;
|
|
}
|
|
|
|
g_return_val_if_fail (ogg_pad->elem_pad != NULL, FALSE);
|
|
|
|
return gst_pad_query_convert (ogg_pad->elem_pad,
|
|
from_format, from_value, to_format, to_value);
|
|
}
|
|
|
|
/* send packet to internal element */
|
|
static GstFlowReturn
|
|
gst_ogg_demux_chain_peer (GstOggPad * pad, ogg_packet * packet)
|
|
{
|
|
GstBuffer *buf;
|
|
GstFlowReturn ret;
|
|
GstOggDemux *ogg = pad->ogg;
|
|
|
|
ret = gst_pad_alloc_buffer (GST_PAD (pad), GST_BUFFER_OFFSET_NONE,
|
|
packet->bytes, GST_PAD_CAPS (pad), &buf);
|
|
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"%p streaming to peer serial %08lx", pad, pad->serialno);
|
|
|
|
if (ret == GST_FLOW_OK) {
|
|
memcpy (buf->data, packet->packet, packet->bytes);
|
|
|
|
GST_BUFFER_OFFSET (buf) = -1;
|
|
GST_BUFFER_OFFSET_END (buf) = packet->granulepos;
|
|
|
|
ret = gst_pad_push (GST_PAD (pad), buf);
|
|
if (ret == GST_FLOW_NOT_LINKED)
|
|
ret = GST_FLOW_OK;
|
|
|
|
if (packet->granulepos >= 0) {
|
|
GstFormat format;
|
|
|
|
ogg->current_granule = packet->granulepos;
|
|
format = GST_FORMAT_TIME;
|
|
if (!gst_ogg_pad_query_convert (pad,
|
|
GST_FORMAT_DEFAULT, packet->granulepos, &format,
|
|
(gint64 *) & ogg->current_time)) {
|
|
g_warning ("could not convert granulepos to time");
|
|
} else {
|
|
GST_DEBUG ("ogg current time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (ogg->current_time));
|
|
}
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"%p could not get buffer from peer %08lx", pad, pad->serialno);
|
|
|
|
if (ret == GST_FLOW_NOT_LINKED)
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* submit a packet to the oggpad, this function will run the
|
|
* typefind code for the pad if this is the first packet for this
|
|
* stream
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_pad_submit_packet (GstOggPad * pad, ogg_packet * packet)
|
|
{
|
|
gint64 granule;
|
|
GstFlowReturn ret;
|
|
|
|
GstOggDemux *ogg = pad->ogg;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "%p submit packet serial %08lx", pad, pad->serialno);
|
|
|
|
/* first packet */
|
|
if (!pad->have_type) {
|
|
gst_ogg_pad_typefind (pad, packet);
|
|
pad->have_type = TRUE;
|
|
}
|
|
|
|
granule = packet->granulepos;
|
|
if (granule != -1) {
|
|
ogg->current_granule = granule;
|
|
pad->current_granule = granule;
|
|
if (pad->first_granule == -1 && granule != 0) {
|
|
pad->first_granule = granule;
|
|
}
|
|
}
|
|
|
|
/* no start time known, stream to internal plugin to
|
|
* get time */
|
|
if (pad->start_time == GST_CLOCK_TIME_NONE) {
|
|
ret = gst_ogg_demux_chain_elem_pad (pad, packet);
|
|
}
|
|
/* we know the start_time of the pad data, see if we
|
|
* can activate the complete chain if this is a dynamic
|
|
* chain. */
|
|
if (pad->start_time != GST_CLOCK_TIME_NONE) {
|
|
GstOggChain *chain = pad->chain;
|
|
|
|
/* check if complete chain has start time */
|
|
if (chain == ogg->building_chain) {
|
|
|
|
/* see if we have enough info to activate the chain */
|
|
if (gst_ogg_demux_collect_chain_info (ogg, chain)) {
|
|
GstEvent *event;
|
|
GstClockTime segment_start, segment_stop;
|
|
|
|
if (chain->begin_time != GST_CLOCK_TIME_NONE) {
|
|
segment_start = chain->segment_start - chain->begin_time;
|
|
segment_stop = chain->segment_stop - chain->begin_time;
|
|
} else {
|
|
segment_start = chain->segment_start;
|
|
segment_stop = chain->segment_stop;
|
|
}
|
|
|
|
/* create the discont event we are going to send out */
|
|
event = gst_event_new_newsegment (FALSE, ogg->segment_rate,
|
|
GST_FORMAT_TIME, segment_start, segment_stop, 0);
|
|
|
|
gst_ogg_demux_activate_chain (ogg, chain, event);
|
|
|
|
ogg->building_chain = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* if we are building a chain, store buffer for when we activate
|
|
* it. This path is taken if we operate in streaming mode. */
|
|
if (ogg->building_chain) {
|
|
ret = gst_ogg_demux_queue_data (pad, packet);
|
|
}
|
|
/* else we are completely streaming to the peer */
|
|
else {
|
|
ret = gst_ogg_demux_chain_peer (pad, packet);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* submit a page to an oggpad, this function will then submit all
|
|
* the packets in the page.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_pad_submit_page (GstOggPad * pad, ogg_page * page)
|
|
{
|
|
ogg_packet packet;
|
|
int ret;
|
|
gboolean done = FALSE;
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_PAD_PARENT (pad));
|
|
|
|
if (ogg_stream_pagein (&pad->stream, page) != 0)
|
|
goto choked;
|
|
|
|
while (!done) {
|
|
ret = ogg_stream_packetout (&pad->stream, &packet);
|
|
GST_LOG_OBJECT (ogg, "packetout gave %d", ret);
|
|
switch (ret) {
|
|
case 0:
|
|
done = TRUE;
|
|
break;
|
|
case -1:
|
|
/* out of sync, could call gst_ogg_pad_reset() here but ogg can decode
|
|
* the packet just fine. We should probably send a DISCONT though. */
|
|
break;
|
|
case 1:
|
|
result = gst_ogg_pad_submit_packet (pad, &packet);
|
|
if (GST_FLOW_IS_FATAL (result))
|
|
goto could_not_submit;
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (ogg,
|
|
"invalid return value %d for ogg_stream_packetout, resetting stream",
|
|
ret);
|
|
gst_ogg_pad_reset (pad);
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
|
|
choked:
|
|
{
|
|
GST_WARNING_OBJECT (ogg,
|
|
"ogg stream choked on page (serial %08lx), resetting stream",
|
|
pad->serialno);
|
|
gst_ogg_pad_reset (pad);
|
|
/* we continue to recover */
|
|
return GST_FLOW_OK;
|
|
}
|
|
could_not_submit:
|
|
{
|
|
GST_WARNING_OBJECT (ogg, "could not submit packet, error: %d", result);
|
|
gst_ogg_pad_reset (pad);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
|
|
static GstOggChain *
|
|
gst_ogg_chain_new (GstOggDemux * ogg)
|
|
{
|
|
GstOggChain *chain = g_new0 (GstOggChain, 1);
|
|
|
|
GST_DEBUG_OBJECT (ogg, "creating new chain %p", chain);
|
|
chain->ogg = ogg;
|
|
chain->offset = -1;
|
|
chain->bytes = -1;
|
|
chain->have_bos = FALSE;
|
|
chain->streams = g_array_new (FALSE, TRUE, sizeof (GstOggPad *));
|
|
chain->begin_time = GST_CLOCK_TIME_NONE;
|
|
chain->segment_start = GST_CLOCK_TIME_NONE;
|
|
chain->total_time = GST_CLOCK_TIME_NONE;
|
|
|
|
return chain;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_chain_free (GstOggChain * chain)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
gst_object_unref (pad);
|
|
}
|
|
g_array_free (chain->streams, TRUE);
|
|
chain->streams = NULL;
|
|
}
|
|
|
|
static GstOggPad *
|
|
gst_ogg_chain_new_stream (GstOggChain * chain, glong serialno)
|
|
{
|
|
GstOggPad *ret;
|
|
GstTagList *list;
|
|
gchar *name;
|
|
|
|
GST_DEBUG_OBJECT (chain->ogg, "creating new stream %08lx in chain %p",
|
|
serialno, chain);
|
|
|
|
ret = g_object_new (GST_TYPE_OGG_PAD, NULL);
|
|
/* we own this one */
|
|
gst_object_ref (ret);
|
|
gst_object_sink (GST_OBJECT (ret));
|
|
|
|
list = gst_tag_list_new ();
|
|
name = g_strdup_printf ("serial_%08lx", serialno);
|
|
|
|
GST_PAD_DIRECTION (ret) = GST_PAD_SRC;
|
|
ret->chain = chain;
|
|
ret->ogg = chain->ogg;
|
|
gst_object_set_name (GST_OBJECT (ret), name);
|
|
g_free (name);
|
|
|
|
ret->serialno = serialno;
|
|
if (ogg_stream_init (&ret->stream, serialno) != 0) {
|
|
GST_ERROR ("Could not initialize ogg_stream struct for serial %08lx.",
|
|
serialno);
|
|
gst_object_unref (ret);
|
|
return NULL;
|
|
}
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_SERIAL, serialno,
|
|
NULL);
|
|
/* FIXME: either have it or remove it */
|
|
//gst_element_found_tags (GST_ELEMENT (ogg), list);
|
|
gst_tag_list_free (list);
|
|
|
|
GST_DEBUG_OBJECT (chain->ogg,
|
|
"created new ogg src %p for stream with serial %08lx", ret, serialno);
|
|
|
|
g_array_append_val (chain->streams, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstOggPad *
|
|
gst_ogg_chain_get_stream (GstOggChain * chain, glong serialno)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (pad->serialno == serialno)
|
|
return pad;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_chain_has_stream (GstOggChain * chain, glong serialno)
|
|
{
|
|
return gst_ogg_chain_get_stream (chain, serialno) != NULL;
|
|
}
|
|
|
|
#define CURRENT_CHAIN(ogg) (&g_array_index ((ogg)->chains, GstOggChain, (ogg)->current_chain))
|
|
|
|
/* signals and args */
|
|
enum
|
|
{
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum
|
|
{
|
|
ARG_0
|
|
/* FILL ME */
|
|
};
|
|
|
|
static GstStaticPadTemplate ogg_demux_src_template_factory =
|
|
GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_SOMETIMES,
|
|
GST_STATIC_CAPS_ANY);
|
|
|
|
static GstStaticPadTemplate ogg_demux_sink_template_factory =
|
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("application/ogg")
|
|
);
|
|
|
|
static void gst_ogg_demux_finalize (GObject * object);
|
|
|
|
//static const GstEventMask *gst_ogg_demux_get_event_masks (GstPad * pad);
|
|
//static const GstQueryType *gst_ogg_demux_get_query_types (GstPad * pad);
|
|
static GstOggChain *gst_ogg_demux_read_chain (GstOggDemux * ogg);
|
|
static gint gst_ogg_demux_read_end_chain (GstOggDemux * ogg,
|
|
GstOggChain * chain);
|
|
|
|
static gboolean gst_ogg_demux_handle_event (GstPad * pad, GstEvent * event);
|
|
static void gst_ogg_demux_loop (GstOggPad * pad);
|
|
static GstFlowReturn gst_ogg_demux_chain (GstPad * pad, GstBuffer * buffer);
|
|
static gboolean gst_ogg_demux_sink_activate (GstPad * sinkpad);
|
|
static gboolean gst_ogg_demux_sink_activate_pull (GstPad * sinkpad,
|
|
gboolean active);
|
|
static gboolean gst_ogg_demux_sink_activate_push (GstPad * sinkpad,
|
|
gboolean active);
|
|
static GstStateChangeReturn gst_ogg_demux_change_state (GstElement * element,
|
|
GstStateChange transition);
|
|
static void gst_ogg_demux_send_event (GstOggDemux * ogg, GstEvent * event);
|
|
|
|
static void gst_ogg_print (GstOggDemux * demux);
|
|
|
|
GST_BOILERPLATE (GstOggDemux, gst_ogg_demux, GstElement, GST_TYPE_ELEMENT);
|
|
|
|
static void
|
|
gst_ogg_demux_base_init (gpointer g_class)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
|
|
static GstElementDetails gst_ogg_demux_details =
|
|
GST_ELEMENT_DETAILS ("ogg demuxer",
|
|
"Codec/Demuxer",
|
|
"demux ogg streams (info about ogg: http://xiph.org)",
|
|
"Wim Taymand <wim@fluendo.com>");
|
|
|
|
gst_element_class_set_details (element_class, &gst_ogg_demux_details);
|
|
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&ogg_demux_sink_template_factory));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&ogg_demux_src_template_factory));
|
|
}
|
|
static void
|
|
gst_ogg_demux_class_init (GstOggDemuxClass * klass)
|
|
{
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
gstelement_class->change_state = gst_ogg_demux_change_state;
|
|
|
|
gobject_class->finalize = gst_ogg_demux_finalize;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_init (GstOggDemux * ogg, GstOggDemuxClass * g_class)
|
|
{
|
|
/* create the sink pad */
|
|
ogg->sinkpad =
|
|
gst_pad_new_from_template (gst_static_pad_template_get
|
|
(&ogg_demux_sink_template_factory), "sink");
|
|
gst_pad_set_event_function (ogg->sinkpad, gst_ogg_demux_handle_event);
|
|
gst_pad_set_chain_function (ogg->sinkpad, gst_ogg_demux_chain);
|
|
gst_pad_set_activate_function (ogg->sinkpad, gst_ogg_demux_sink_activate);
|
|
gst_pad_set_activatepull_function (ogg->sinkpad,
|
|
gst_ogg_demux_sink_activate_pull);
|
|
gst_pad_set_activatepush_function (ogg->sinkpad,
|
|
gst_ogg_demux_sink_activate_push);
|
|
gst_element_add_pad (GST_ELEMENT (ogg), ogg->sinkpad);
|
|
|
|
ogg->chain_lock = g_mutex_new ();
|
|
ogg->chains = g_array_new (FALSE, TRUE, sizeof (GstOggChain *));
|
|
|
|
ogg->current_granule = -1;
|
|
ogg->current_time = 0;
|
|
|
|
ogg->segment_rate = 1.0;
|
|
ogg->segment_start = GST_CLOCK_TIME_NONE;
|
|
ogg->segment_stop = GST_CLOCK_TIME_NONE;
|
|
ogg->segment_play = FALSE;
|
|
ogg->total_time = GST_CLOCK_TIME_NONE;
|
|
|
|
ogg->running = FALSE;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_finalize (GObject * object)
|
|
{
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (object);
|
|
|
|
g_mutex_free (ogg->chain_lock);
|
|
ogg_sync_clear (&ogg->sync);
|
|
|
|
if (G_OBJECT_CLASS (parent_class)->finalize)
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_handle_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstOggDemux *ogg = GST_OGG_DEMUX (GST_PAD_PARENT (pad));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_NEWSEGMENT:
|
|
GST_DEBUG_OBJECT (ogg, "got a new segment event");
|
|
ogg_sync_reset (&ogg->sync);
|
|
gst_event_unref (event);
|
|
break;
|
|
default:
|
|
return gst_pad_event_default (pad, event);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* submit the given buffer to the ogg sync.
|
|
*
|
|
* Returns the number of bytes submited.
|
|
*/
|
|
static gint
|
|
gst_ogg_demux_submit_buffer (GstOggDemux * ogg, GstBuffer * buffer)
|
|
{
|
|
guint size;
|
|
guint8 *data;
|
|
gchar *oggbuffer;
|
|
|
|
size = GST_BUFFER_SIZE (buffer);
|
|
data = GST_BUFFER_DATA (buffer);
|
|
|
|
oggbuffer = ogg_sync_buffer (&ogg->sync, size);
|
|
memcpy (oggbuffer, data, size);
|
|
ogg_sync_wrote (&ogg->sync, size);
|
|
gst_buffer_unref (buffer);
|
|
|
|
return size;
|
|
}
|
|
|
|
/* in random access mode this code updates the current read position
|
|
* and resets the ogg sync buffer so that the next read will happen
|
|
* from this new location.
|
|
*/
|
|
static void
|
|
gst_ogg_demux_seek (GstOggDemux * ogg, gint64 offset)
|
|
{
|
|
GST_LOG_OBJECT (ogg, "seeking to %lld", offset);
|
|
|
|
ogg->offset = offset;
|
|
ogg_sync_reset (&ogg->sync);
|
|
}
|
|
|
|
/* read more data from the current offset and submit to
|
|
* the ogg sync layer.
|
|
*
|
|
* Return number of bytes written.
|
|
*/
|
|
static gint
|
|
gst_ogg_demux_get_data (GstOggDemux * ogg)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstBuffer *buffer;
|
|
gint size;
|
|
|
|
GST_LOG_OBJECT (ogg, "get data %lld %lld", ogg->offset, ogg->length);
|
|
if (ogg->offset == ogg->length)
|
|
return 0;
|
|
|
|
ret = gst_pad_pull_range (ogg->sinkpad, ogg->offset, CHUNKSIZE, &buffer);
|
|
if (ret != GST_FLOW_OK)
|
|
return -1;
|
|
|
|
size = gst_ogg_demux_submit_buffer (ogg, buffer);
|
|
|
|
return size;
|
|
}
|
|
|
|
/* Read the next page from the current offset.
|
|
*/
|
|
static gint64
|
|
gst_ogg_demux_get_next_page (GstOggDemux * ogg, ogg_page * og, gint64 boundary)
|
|
{
|
|
gint64 end_offset = 0;
|
|
|
|
GST_LOG_OBJECT (ogg, "get next page %lld", boundary);
|
|
|
|
if (boundary > 0)
|
|
end_offset = ogg->offset + boundary;
|
|
|
|
while (TRUE) {
|
|
glong more;
|
|
|
|
if (boundary > 0 && ogg->offset >= end_offset) {
|
|
GST_LOG_OBJECT (ogg, "offset %lld >= end_offset %lld", ogg->offset,
|
|
end_offset);
|
|
return OV_FALSE;
|
|
}
|
|
|
|
more = ogg_sync_pageseek (&ogg->sync, og);
|
|
|
|
if (more < 0) {
|
|
GST_LOG_OBJECT (ogg, "skipped %ld bytes", more);
|
|
/* skipped n bytes */
|
|
ogg->offset -= more;
|
|
} else if (more == 0) {
|
|
gint ret;
|
|
|
|
/* send more paramedics */
|
|
if (boundary == 0)
|
|
return OV_FALSE;
|
|
|
|
ret = gst_ogg_demux_get_data (ogg);
|
|
if (ret == 0)
|
|
return OV_EOF;
|
|
if (ret < 0)
|
|
return OV_EREAD;
|
|
} else {
|
|
/* got a page. Return the offset at the page beginning,
|
|
advance the internal offset past the page end */
|
|
gint64 ret = ogg->offset;
|
|
|
|
ogg->offset += more;
|
|
/* need to reset as we do not keep track of the bytes we
|
|
* sent to the sync layer */
|
|
ogg_sync_reset (&ogg->sync);
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"got page at %lld, serial %08lx, end at %lld, granule %lld", ret,
|
|
ogg_page_serialno (og), ogg->offset, ogg_page_granulepos (og));
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* from the current offset, find the previous page, seeking backwards
|
|
* until we find the page. */
|
|
static gint
|
|
gst_ogg_demux_get_prev_page (GstOggDemux * ogg, ogg_page * og)
|
|
{
|
|
gint64 begin = ogg->offset;
|
|
gint64 end = begin;
|
|
gint64 ret;
|
|
gint64 offset = -1;
|
|
|
|
while (offset == -1) {
|
|
begin -= CHUNKSIZE;
|
|
if (begin < 0)
|
|
begin = 0;
|
|
|
|
gst_ogg_demux_seek (ogg, begin);
|
|
|
|
/* now continue reading until we run out of data, if we find a page
|
|
* start, we save it. It might not be the final page as there could be
|
|
* another page after this one. */
|
|
while (ogg->offset < end) {
|
|
ret = gst_ogg_demux_get_next_page (ogg, og, end - ogg->offset);
|
|
if (ret == OV_EREAD)
|
|
return OV_EREAD;
|
|
if (ret < 0) {
|
|
break;
|
|
} else {
|
|
offset = ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* we have the offset. Actually snork and hold the page now */
|
|
gst_ogg_demux_seek (ogg, offset);
|
|
ret = gst_ogg_demux_get_next_page (ogg, og, CHUNKSIZE);
|
|
if (ret < 0)
|
|
/* this shouldn't be possible */
|
|
return OV_EFAULT;
|
|
|
|
return offset;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_deactivate_current_chain (GstOggDemux * ogg)
|
|
{
|
|
gint i;
|
|
GstOggChain *chain = ogg->current_chain;
|
|
|
|
if (chain == NULL)
|
|
return TRUE;
|
|
|
|
/* send EOS on all the pads */
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
gst_pad_push_event (GST_PAD (pad), gst_event_new_eos ());
|
|
gst_element_remove_pad (GST_ELEMENT (ogg), GST_PAD (pad));
|
|
}
|
|
/* if we cannot seek back to the chain, we can destroy the chain
|
|
* completely */
|
|
if (!ogg->seekable) {
|
|
gst_ogg_chain_free (chain);
|
|
}
|
|
ogg->current_chain = NULL;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_activate_chain (GstOggDemux * ogg, GstOggChain * chain,
|
|
GstEvent * event)
|
|
{
|
|
gint i;
|
|
|
|
if (chain == ogg->current_chain) {
|
|
if (event)
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
}
|
|
|
|
gst_ogg_demux_deactivate_current_chain (ogg);
|
|
|
|
GST_DEBUG ("activating chain");
|
|
|
|
/* first add the pads */
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad;
|
|
|
|
pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
gst_element_add_pad (GST_ELEMENT (ogg), GST_PAD (pad));
|
|
}
|
|
|
|
gst_element_no_more_pads (GST_ELEMENT (ogg));
|
|
ogg->current_chain = chain;
|
|
|
|
if (event)
|
|
gst_ogg_demux_send_event (ogg, event);
|
|
|
|
GST_DEBUG ("starting chain");
|
|
|
|
/* then send out any queued buffers */
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GList *headers;
|
|
GstOggPad *pad;
|
|
|
|
pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
for (headers = pad->headers; headers; headers = g_list_next (headers)) {
|
|
GstBuffer *buffer = GST_BUFFER (headers->data);
|
|
|
|
/* we don't care about the return value here */
|
|
gst_pad_push (GST_PAD_CAST (pad), buffer);
|
|
}
|
|
/* and free the headers */
|
|
g_list_free (pad->headers);
|
|
pad->headers = NULL;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_perform_seek (GstOggDemux * ogg, gboolean accurate,
|
|
gboolean flush)
|
|
{
|
|
GstOggChain *chain = NULL;
|
|
gint64 begin, end;
|
|
gint64 begintime, endtime;
|
|
gint64 target;
|
|
gint64 best;
|
|
gint64 total;
|
|
gint64 result = 0;
|
|
gint64 start, stop;
|
|
gint i;
|
|
|
|
/* first step is to unlock the streaming thread if it is
|
|
* blocked in a chain call, we do this by starting the flush. because
|
|
* we cannot yet hold any streaming lock, we have to protect the chains
|
|
* with their own lock. */
|
|
if (flush) {
|
|
gint i;
|
|
|
|
gst_pad_push_event (ogg->sinkpad, gst_event_new_flush_start ());
|
|
|
|
GST_CHAIN_LOCK (ogg);
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
gint j;
|
|
|
|
for (j = 0; j < chain->streams->len; j++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, j);
|
|
|
|
gst_pad_push_event (GST_PAD (pad), gst_event_new_flush_start ());
|
|
}
|
|
}
|
|
GST_CHAIN_UNLOCK (ogg);
|
|
} else {
|
|
gst_pad_pause_task (ogg->sinkpad);
|
|
}
|
|
|
|
/* now grab the stream lock so that streaming cannot continue, for
|
|
* non flushing seeks when the element is in PAUSED this could block
|
|
* forever. */
|
|
GST_STREAM_LOCK (ogg->sinkpad);
|
|
|
|
GST_LOCK (ogg);
|
|
/* nothing configured, play complete file */
|
|
if (ogg->segment_start == GST_CLOCK_TIME_NONE)
|
|
ogg->segment_start = 0;
|
|
if (ogg->segment_stop == GST_CLOCK_TIME_NONE)
|
|
ogg->segment_stop = ogg->total_time;
|
|
|
|
ogg->segment_start = CLAMP (ogg->segment_start, 0, ogg->total_time);
|
|
if (ogg->segment_stop != GST_CLOCK_TIME_NONE)
|
|
ogg->segment_stop = CLAMP (ogg->segment_stop, 0, ogg->total_time);
|
|
|
|
start = ogg->segment_start;
|
|
stop = ogg->segment_stop;
|
|
GST_UNLOCK (ogg);
|
|
|
|
/* we need to stop flushing on the srcpad as we're going to use it
|
|
* next. We can do this as we have the STREAM lock now. */
|
|
gst_pad_push_event (ogg->sinkpad, gst_event_new_flush_stop ());
|
|
|
|
{
|
|
gint i;
|
|
|
|
/* reset all ogg streams now, need to do this from within the lock to
|
|
* make sure the streaming thread is not messing with the stream */
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
gint j;
|
|
|
|
for (j = 0; j < chain->streams->len; j++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, j);
|
|
|
|
ogg_stream_reset (&pad->stream);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* first find the chain to search in */
|
|
total = ogg->total_time;
|
|
if (ogg->chains->len == 0)
|
|
goto no_chains;
|
|
|
|
for (i = ogg->chains->len - 1; i >= 0; i--) {
|
|
chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
total -= chain->total_time;
|
|
if (start >= total)
|
|
break;
|
|
}
|
|
|
|
begin = chain->offset;
|
|
end = chain->end_offset;
|
|
begintime = chain->begin_time;
|
|
endtime = chain->begin_time + chain->total_time;
|
|
target = start - total + begintime;
|
|
if (accurate) {
|
|
/* FIXME, seek 4 seconds early to catch keyframes, better implement
|
|
* keyframe detection. */
|
|
target = target - (gint64) 4 *GST_SECOND;
|
|
}
|
|
target = MAX (target, 0);
|
|
best = begin;
|
|
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"seeking to %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT " in chain %p",
|
|
GST_TIME_ARGS (start), GST_TIME_ARGS (stop), chain);
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"chain offset %" G_GINT64_FORMAT ", end offset %" G_GINT64_FORMAT, begin,
|
|
end);
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"chain begin time %" GST_TIME_FORMAT ", end time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (begintime), GST_TIME_ARGS (endtime));
|
|
GST_DEBUG_OBJECT (ogg, "target %" GST_TIME_FORMAT, GST_TIME_ARGS (target));
|
|
|
|
/* perform the seek */
|
|
while (begin < end) {
|
|
gint64 bisect;
|
|
|
|
if ((end - begin < CHUNKSIZE) || (endtime == begintime)) {
|
|
bisect = begin;
|
|
} else {
|
|
/* take a (pretty decent) guess, avoiding overflow */
|
|
gint64 rate = (end - begin) * GST_MSECOND / (endtime - begintime);
|
|
|
|
bisect = (target - begintime) / GST_MSECOND * rate + begin - CHUNKSIZE;
|
|
|
|
if (bisect <= begin)
|
|
bisect = begin;
|
|
}
|
|
gst_ogg_demux_seek (ogg, bisect);
|
|
|
|
while (begin < end) {
|
|
ogg_page og;
|
|
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"after seek, bisect %" G_GINT64_FORMAT ", begin %" G_GINT64_FORMAT
|
|
", end %" G_GINT64_FORMAT, bisect, begin, end);
|
|
|
|
result = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset);
|
|
if (result == OV_EREAD) {
|
|
goto seek_error;
|
|
}
|
|
|
|
if (result < 0) {
|
|
if (bisect <= begin + 1) {
|
|
end = begin; /* found it */
|
|
} else {
|
|
if (bisect == 0)
|
|
goto seek_error;
|
|
|
|
bisect -= CHUNKSIZE;
|
|
if (bisect <= begin)
|
|
bisect = begin + 1;
|
|
|
|
gst_ogg_demux_seek (ogg, bisect);
|
|
}
|
|
} else {
|
|
gint64 granulepos;
|
|
GstClockTime granuletime;
|
|
GstFormat format;
|
|
GstOggPad *pad;
|
|
|
|
granulepos = ogg_page_granulepos (&og);
|
|
if (granulepos == -1)
|
|
continue;
|
|
|
|
pad = gst_ogg_chain_get_stream (chain, ogg_page_serialno (&og));
|
|
if (pad == NULL)
|
|
continue;
|
|
|
|
format = GST_FORMAT_TIME;
|
|
if (!gst_ogg_pad_query_convert (pad,
|
|
GST_FORMAT_DEFAULT, granulepos, &format,
|
|
(gint64 *) & granuletime)) {
|
|
g_warning ("could not convert granulepos to time");
|
|
granuletime = target;
|
|
} else {
|
|
granuletime -= pad->first_time;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"found page with granule %" G_GINT64_FORMAT " and time %"
|
|
GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (granuletime));
|
|
|
|
if (granuletime < target) {
|
|
best = result; /* raw offset of packet with granulepos */
|
|
begin = ogg->offset; /* raw offset of next page */
|
|
begintime = granuletime;
|
|
|
|
if (target - begintime > GST_SECOND)
|
|
break;
|
|
|
|
bisect = begin; /* *not* begin + 1 */
|
|
} else {
|
|
if (bisect <= begin + 1) {
|
|
end = begin; /* found it */
|
|
} else {
|
|
if (end == ogg->offset) { /* we're pretty close - we'd be stuck in */
|
|
end = result;
|
|
bisect -= CHUNKSIZE; /* an endless loop otherwise. */
|
|
if (bisect <= begin)
|
|
bisect = begin + 1;
|
|
gst_ogg_demux_seek (ogg, bisect);
|
|
} else {
|
|
end = result;
|
|
endtime = granuletime;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ogg->offset = best;
|
|
|
|
/* current time starts from 0 again after a flush */
|
|
if (flush)
|
|
ogg->current_time = 0;
|
|
|
|
/* now we have a new position, prepare for streaming again */
|
|
{
|
|
GstEvent *event;
|
|
|
|
/* we have to send the flush to the old chain, not the new one */
|
|
if (flush)
|
|
gst_ogg_demux_send_event (ogg, gst_event_new_flush_stop ());
|
|
|
|
/* create the discont event we are going to send out */
|
|
event = gst_event_new_newsegment (FALSE, 1.0,
|
|
GST_FORMAT_TIME,
|
|
start + chain->segment_start, stop + chain->segment_start, start);
|
|
|
|
if (chain != ogg->current_chain) {
|
|
/* switch to different chain, send discont on new chain */
|
|
gst_ogg_demux_activate_chain (ogg, chain, event);
|
|
} else {
|
|
/* send discont on old chain */
|
|
gst_ogg_demux_send_event (ogg, event);
|
|
}
|
|
|
|
/* notify start of new segment */
|
|
if (ogg->segment_play) {
|
|
gst_element_post_message (GST_ELEMENT (ogg),
|
|
gst_message_new_segment_start (GST_OBJECT (ogg), GST_FORMAT_TIME,
|
|
ogg->segment_start));
|
|
}
|
|
/* restart our task since it might have been stopped when we did the
|
|
* flush. */
|
|
gst_pad_start_task (ogg->sinkpad, (GstTaskFunction) gst_ogg_demux_loop,
|
|
ogg->sinkpad);
|
|
}
|
|
|
|
/* streaming can continue now */
|
|
GST_STREAM_UNLOCK (ogg->sinkpad);
|
|
|
|
return TRUE;
|
|
|
|
no_chains:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "no chains");
|
|
GST_STREAM_UNLOCK (ogg->sinkpad);
|
|
|
|
return FALSE;
|
|
}
|
|
seek_error:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "got a seek error");
|
|
GST_STREAM_UNLOCK (ogg->sinkpad);
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* finds each bitstream link one at a time using a bisection search
|
|
* (has to begin by knowing the offset of the lb's initial page).
|
|
* Recurses for each link so it can alloc the link storage after
|
|
* finding them all, then unroll and fill the cache at the same time
|
|
*/
|
|
static gint
|
|
gst_ogg_demux_bisect_forward_serialno (GstOggDemux * ogg,
|
|
gint64 begin, gint64 searched, gint64 end, GstOggChain * chain, glong m)
|
|
{
|
|
gint64 endsearched = end;
|
|
gint64 next = end;
|
|
ogg_page og;
|
|
gint64 ret;
|
|
GstOggChain *nextchain;
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"bisect begin: %lld, searched: %lld, end %lld, chain: %p", begin,
|
|
searched, end, chain);
|
|
|
|
/* the below guards against garbage seperating the last and
|
|
* first pages of two links. */
|
|
while (searched < endsearched) {
|
|
gint64 bisect;
|
|
|
|
if (endsearched - searched < CHUNKSIZE) {
|
|
bisect = searched;
|
|
} else {
|
|
bisect = (searched + endsearched) / 2;
|
|
}
|
|
|
|
gst_ogg_demux_seek (ogg, bisect);
|
|
ret = gst_ogg_demux_get_next_page (ogg, &og, -1);
|
|
if (ret == OV_EREAD) {
|
|
GST_LOG_OBJECT (ogg, "OV_READ");
|
|
return OV_EREAD;
|
|
}
|
|
|
|
if (ret < 0) {
|
|
endsearched = bisect;
|
|
} else {
|
|
glong serial = ogg_page_serialno (&og);
|
|
|
|
if (!gst_ogg_chain_has_stream (chain, serial)) {
|
|
endsearched = bisect;
|
|
next = ret;
|
|
} else {
|
|
searched = ret + og.header_len + og.body_len;
|
|
}
|
|
}
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "current chain ends at %lld", searched);
|
|
|
|
chain->end_offset = searched;
|
|
gst_ogg_demux_read_end_chain (ogg, chain);
|
|
|
|
GST_LOG_OBJECT (ogg, "found begin at %lld", next);
|
|
|
|
gst_ogg_demux_seek (ogg, next);
|
|
nextchain = gst_ogg_demux_read_chain (ogg);
|
|
|
|
if (searched < end && nextchain != NULL) {
|
|
ret = gst_ogg_demux_bisect_forward_serialno (ogg, next, ogg->offset,
|
|
end, nextchain, m + 1);
|
|
|
|
if (ret == OV_EREAD) {
|
|
GST_LOG_OBJECT (ogg, "OV_READ");
|
|
return OV_EREAD;
|
|
}
|
|
}
|
|
g_array_insert_val (ogg->chains, 0, chain);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* read a chain from the ogg file. This code will
|
|
* read all BOS pages and will create and return a GstOggChain
|
|
* structure with the results.
|
|
*
|
|
* This function will also read N pages from each stream in the
|
|
* chain and submit them to the decoders. When the decoder has
|
|
* decoded the first buffer, we know the timestamp of the first
|
|
* page in the chain.
|
|
*/
|
|
static GstOggChain *
|
|
gst_ogg_demux_read_chain (GstOggDemux * ogg)
|
|
{
|
|
GstOggChain *chain = NULL;
|
|
gint64 offset = ogg->offset;
|
|
ogg_page op;
|
|
gboolean done;
|
|
gint i;
|
|
|
|
GST_LOG_OBJECT (ogg, "reading chain at %lld", offset);
|
|
|
|
/* first read the BOS pages, do typefind on them, create
|
|
* the decoders, send data to the decoders. */
|
|
while (TRUE) {
|
|
GstOggPad *pad;
|
|
glong serial;
|
|
gint ret;
|
|
|
|
ret = gst_ogg_demux_get_next_page (ogg, &op, -1);
|
|
if (ret < 0 || !ogg_page_bos (&op))
|
|
break;
|
|
|
|
if (chain == NULL) {
|
|
chain = gst_ogg_chain_new (ogg);
|
|
chain->offset = offset;
|
|
}
|
|
|
|
serial = ogg_page_serialno (&op);
|
|
pad = gst_ogg_chain_new_stream (chain, serial);
|
|
gst_ogg_pad_submit_page (pad, &op);
|
|
}
|
|
if (chain == NULL) {
|
|
GST_WARNING_OBJECT (ogg, "failed to read chain");
|
|
return NULL;
|
|
}
|
|
chain->have_bos = TRUE;
|
|
GST_LOG_OBJECT (ogg, "read bos pages, init decoder now");
|
|
|
|
/* now read pages until we receive a buffer from each of the
|
|
* stream decoders, this will tell us the timestamp of the
|
|
* first packet in the chain then */
|
|
|
|
/* save the offset to the first non bos page in the chain: if searching for
|
|
* pad->first_time we read past the end of the chain, we'll seek back to this
|
|
* position
|
|
*/
|
|
offset = ogg->offset;
|
|
|
|
done = FALSE;
|
|
while (!done) {
|
|
glong serial;
|
|
gboolean known_serial = FALSE;
|
|
gint ret;
|
|
|
|
serial = ogg_page_serialno (&op);
|
|
done = TRUE;
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (pad->serialno == serial) {
|
|
known_serial = TRUE;
|
|
|
|
if (pad->start_time == -1 && ogg_page_eos (&op)) {
|
|
/* got EOS on a pad before we could find its start_time.
|
|
* We have no chance of finding a start_time for every pad so
|
|
* stop searching for the other start_time(s).
|
|
*/
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
gst_ogg_pad_submit_page (pad, &op);
|
|
}
|
|
/* the timestamp will be filled in when we submit the pages */
|
|
done &= (pad->start_time != GST_CLOCK_TIME_NONE);
|
|
GST_LOG_OBJECT (ogg, "done %08lx now %d", serial, done);
|
|
}
|
|
|
|
/* we read a page not belonging to the current chain: seek back to the
|
|
* beginning of the chain
|
|
*/
|
|
if (!known_serial) {
|
|
gst_ogg_demux_seek (ogg, offset);
|
|
break;
|
|
}
|
|
|
|
if (!done) {
|
|
ret = gst_ogg_demux_get_next_page (ogg, &op, -1);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
}
|
|
GST_LOG_OBJECT (ogg, "done reading chain");
|
|
/* now we can fill in the missing info using queries */
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
GstFormat target;
|
|
|
|
target = GST_FORMAT_TIME;
|
|
if (!gst_ogg_pad_query_convert (pad,
|
|
GST_FORMAT_DEFAULT, pad->first_granule, &target,
|
|
(gint64 *) & pad->first_time)) {
|
|
g_warning ("could not convert granule to time");
|
|
}
|
|
|
|
pad->mode = GST_OGG_PAD_MODE_STREAMING;
|
|
}
|
|
return chain;
|
|
}
|
|
|
|
/* read the last pages from the ogg stream to get the final
|
|
* page end_offsets.
|
|
*/
|
|
static gint
|
|
gst_ogg_demux_read_end_chain (GstOggDemux * ogg, GstOggChain * chain)
|
|
{
|
|
gint64 begin = chain->end_offset;
|
|
gint64 end = begin;
|
|
gint64 last_granule = -1;
|
|
GstOggPad *last_pad = NULL;
|
|
GstFormat target;
|
|
gint64 ret;
|
|
gboolean done = FALSE;
|
|
ogg_page og;
|
|
gint i;
|
|
|
|
while (!done) {
|
|
begin -= CHUNKSIZE;
|
|
if (begin < 0)
|
|
begin = 0;
|
|
|
|
gst_ogg_demux_seek (ogg, begin);
|
|
|
|
/* now continue reading until we run out of data, if we find a page
|
|
* start, we save it. It might not be the final page as there could be
|
|
* another page after this one. */
|
|
while (ogg->offset < end) {
|
|
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset);
|
|
if (ret == OV_EREAD)
|
|
return OV_EREAD;
|
|
if (ret < 0) {
|
|
break;
|
|
} else {
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (pad->serialno == ogg_page_serialno (&og)) {
|
|
gint64 granulepos = ogg_page_granulepos (&og);
|
|
|
|
if (last_granule < granulepos) {
|
|
last_granule = granulepos;
|
|
last_pad = pad;
|
|
}
|
|
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
target = GST_FORMAT_TIME;
|
|
if (last_granule == -1 || !gst_ogg_pad_query_convert (last_pad,
|
|
GST_FORMAT_DEFAULT, last_granule, &target,
|
|
(gint64 *) & chain->segment_stop)) {
|
|
g_warning ("could not convert granule to time");
|
|
chain->segment_stop = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* find a pad with a given serial number
|
|
*/
|
|
static GstOggPad *
|
|
gst_ogg_demux_find_pad (GstOggDemux * ogg, int serialno)
|
|
{
|
|
GstOggPad *pad;
|
|
gint i;
|
|
|
|
/* first look in building chain if any */
|
|
if (ogg->building_chain) {
|
|
pad = gst_ogg_chain_get_stream (ogg->building_chain, serialno);
|
|
if (pad)
|
|
return pad;
|
|
}
|
|
|
|
/* then look in current chain if any */
|
|
if (ogg->current_chain) {
|
|
pad = gst_ogg_chain_get_stream (ogg->current_chain, serialno);
|
|
if (pad)
|
|
return pad;
|
|
}
|
|
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
pad = gst_ogg_chain_get_stream (chain, serialno);
|
|
if (pad)
|
|
return pad;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* find a chain with a given serial number
|
|
*/
|
|
static GstOggChain *
|
|
gst_ogg_demux_find_chain (GstOggDemux * ogg, int serialno)
|
|
{
|
|
GstOggPad *pad;
|
|
|
|
pad = gst_ogg_demux_find_pad (ogg, serialno);
|
|
if (pad) {
|
|
return pad->chain;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_collect_chain_info (GstOggDemux * ogg, GstOggChain * chain)
|
|
{
|
|
gint i;
|
|
|
|
chain->total_time = GST_CLOCK_TIME_NONE;
|
|
chain->segment_start = G_MAXINT64;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
/* can do this if the pad start time is not defined */
|
|
if (pad->start_time == GST_CLOCK_TIME_NONE)
|
|
goto no_start_time;
|
|
|
|
chain->segment_start = MIN (chain->segment_start, pad->start_time);
|
|
}
|
|
|
|
if (chain->segment_stop != GST_CLOCK_TIME_NONE)
|
|
chain->total_time = chain->segment_stop - chain->segment_start;
|
|
|
|
return TRUE;
|
|
|
|
/* ERROR */
|
|
no_start_time:
|
|
{
|
|
chain->total_time = GST_CLOCK_TIME_NONE;
|
|
chain->segment_start = GST_CLOCK_TIME_NONE;
|
|
chain->segment_stop = GST_CLOCK_TIME_NONE;
|
|
chain->begin_time = GST_CLOCK_TIME_NONE;
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_collect_info (GstOggDemux * ogg)
|
|
{
|
|
gint i;
|
|
|
|
/* collect all info */
|
|
ogg->total_time = 0;
|
|
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
chain->begin_time = ogg->total_time;
|
|
|
|
gst_ogg_demux_collect_chain_info (ogg, chain);
|
|
|
|
ogg->total_time += chain->total_time;
|
|
}
|
|
}
|
|
|
|
/* find all the chains in the ogg file, this reads the first and
|
|
* last page of the ogg stream, if they match then the ogg file has
|
|
* just one chain, else we do a binary search for all chains.
|
|
*/
|
|
static gboolean
|
|
gst_ogg_demux_find_chains (GstOggDemux * ogg)
|
|
{
|
|
ogg_page og;
|
|
GstPad *peer;
|
|
GstFormat format;
|
|
gboolean res;
|
|
gulong serialno;
|
|
GstOggChain *chain;
|
|
|
|
/* get peer to figure out length */
|
|
if ((peer = gst_pad_get_peer (ogg->sinkpad)) == NULL)
|
|
goto no_peer;
|
|
|
|
/* find length to read last page, we store this for later use. */
|
|
format = GST_FORMAT_BYTES;
|
|
res = gst_pad_query_duration (peer, &format, &ogg->length);
|
|
gst_object_unref (peer);
|
|
if (!res)
|
|
goto no_length;
|
|
|
|
GST_DEBUG ("file length %lld", ogg->length);
|
|
|
|
/* read chain from offset 0, this is the first chain of the
|
|
* ogg file. */
|
|
gst_ogg_demux_seek (ogg, 0);
|
|
chain = gst_ogg_demux_read_chain (ogg);
|
|
if (chain == NULL)
|
|
goto no_first_chain;
|
|
|
|
/* read page from end offset, we use this page to check if its serial
|
|
* number is contained in the first chain. If this is the case then
|
|
* this ogg is not a chained ogg and we can skip the scanning. */
|
|
gst_ogg_demux_seek (ogg, ogg->length);
|
|
gst_ogg_demux_get_prev_page (ogg, &og);
|
|
serialno = ogg_page_serialno (&og);
|
|
|
|
if (!gst_ogg_chain_has_stream (chain, serialno)) {
|
|
/* the last page is not in the first stream, this means we should
|
|
* find all the chains in this chained ogg. */
|
|
gst_ogg_demux_bisect_forward_serialno (ogg, 0, 0, ogg->length, chain, 0);
|
|
} else {
|
|
/* we still call this function here but with an empty range so that
|
|
* we can reuse the setup code in this routine. */
|
|
gst_ogg_demux_bisect_forward_serialno (ogg, 0, ogg->length, ogg->length,
|
|
chain, 0);
|
|
}
|
|
gst_ogg_demux_collect_info (ogg);
|
|
|
|
/* dump our chains and streams */
|
|
gst_ogg_print (ogg);
|
|
|
|
return TRUE;
|
|
|
|
/*** error cases ***/
|
|
no_peer:
|
|
{
|
|
GST_DEBUG ("we don't have a peer");
|
|
return FALSE;
|
|
}
|
|
no_length:
|
|
{
|
|
GST_DEBUG ("can't get file length");
|
|
return FALSE;
|
|
}
|
|
no_first_chain:
|
|
{
|
|
GST_DEBUG ("can't get first chain");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* streaming mode, receive a buffer, parse it, create pads for
|
|
* the serialno, submit pages and packets to the oggpads
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstOggDemux *ogg;
|
|
gint ret = -1;
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
guint serialno;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
|
|
|
|
GST_DEBUG ("chain");
|
|
gst_ogg_demux_submit_buffer (ogg, buffer);
|
|
|
|
while (ret != 0 && result == GST_FLOW_OK) {
|
|
ogg_page page;
|
|
|
|
ret = ogg_sync_pageout (&ogg->sync, &page);
|
|
if (ret == 0)
|
|
/* need more data */
|
|
break;
|
|
if (ret == -1) {
|
|
/* discontinuity in the pages */
|
|
} else {
|
|
GstOggPad *pad;
|
|
gint64 granule;
|
|
|
|
serialno = ogg_page_serialno (&page);
|
|
granule = ogg_page_granulepos (&page);
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"processing ogg page (serial %08lx, pageno %ld, granule pos %llu, bos %d)",
|
|
serialno, ogg_page_pageno (&page), granule, ogg_page_bos (&page));
|
|
|
|
if (ogg_page_bos (&page)) {
|
|
GstOggChain *chain;
|
|
|
|
/* first page */
|
|
/* see if we know about the chain already */
|
|
chain = gst_ogg_demux_find_chain (ogg, serialno);
|
|
if (chain) {
|
|
/* we do, activate it as it means we have a non-header */
|
|
gst_ogg_demux_activate_chain (ogg, chain, NULL);
|
|
pad = gst_ogg_demux_find_pad (ogg, serialno);
|
|
} else {
|
|
GstClockTime chain_time;
|
|
GstOggChain *current_chain;
|
|
|
|
/* this can only happen in non-seekabe mode */
|
|
if (ogg->seekable)
|
|
goto unknown_chain;
|
|
|
|
current_chain = ogg->current_chain;
|
|
if (current_chain) {
|
|
GstClockTime duration;
|
|
|
|
/* this was the duration of the previous chain */
|
|
duration = ogg->current_time - current_chain->segment_start;
|
|
/* the new chain time starts at duration + begin_time */
|
|
chain_time = duration + current_chain->begin_time;
|
|
|
|
/* remove existing pads */
|
|
gst_ogg_demux_deactivate_current_chain (ogg);
|
|
} else {
|
|
/* non previous chain, start at configured current time */
|
|
chain_time = ogg->current_time;
|
|
}
|
|
if (ogg->building_chain == NULL) {
|
|
GstOggChain *newchain;
|
|
|
|
newchain = gst_ogg_chain_new (ogg);
|
|
newchain->offset = 0;
|
|
/* set new chain begin time aligned with end time of old chain */
|
|
newchain->begin_time = chain_time;
|
|
GST_DEBUG ("new chain, begin time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain_time));
|
|
|
|
/* and this is the one we are building now */
|
|
ogg->building_chain = newchain;
|
|
}
|
|
pad = gst_ogg_chain_new_stream (ogg->building_chain, serialno);
|
|
}
|
|
} else {
|
|
pad = gst_ogg_demux_find_pad (ogg, serialno);
|
|
}
|
|
if (pad) {
|
|
result = gst_ogg_pad_submit_page (pad, &page);
|
|
} else {
|
|
/* no pad, this is pretty fatal. This means an ogg page without bos
|
|
* has been seen for this serialno. could just ignore it too... */
|
|
goto unknown_pad;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
|
|
unknown_chain:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
|
|
(NULL), ("unknown ogg chain for serial %08x detected", serialno));
|
|
gst_ogg_demux_send_event (ogg, gst_event_new_eos ());
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
unknown_pad:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
|
|
(NULL), ("unknown ogg pad for serial %08d detected", serialno));
|
|
gst_ogg_demux_send_event (ogg, gst_event_new_eos ());
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_send_event (GstOggDemux * ogg, GstEvent * event)
|
|
{
|
|
GstOggChain *chain = ogg->current_chain;
|
|
|
|
if (chain) {
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
gst_event_ref (event);
|
|
gst_pad_push_event (GST_PAD (pad), event);
|
|
}
|
|
}
|
|
gst_event_unref (event);
|
|
}
|
|
|
|
/* random access code
|
|
*
|
|
* - first find all the chains and streams by scanning the
|
|
* file.
|
|
* - then get and chain buffers, just like the streaming
|
|
* case.
|
|
* - when seeking, we can use the chain info to perform the
|
|
* seek.
|
|
*/
|
|
static void
|
|
gst_ogg_demux_loop (GstOggPad * pad)
|
|
{
|
|
GstOggDemux *ogg;
|
|
GstFlowReturn ret;
|
|
GstBuffer *buffer;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
|
|
|
|
if (ogg->need_chains) {
|
|
gboolean got_chains;
|
|
|
|
/* this is the only place where we write chains */
|
|
GST_CHAIN_LOCK (ogg);
|
|
got_chains = gst_ogg_demux_find_chains (ogg);
|
|
GST_CHAIN_UNLOCK (ogg);
|
|
if (!got_chains)
|
|
goto chain_read_failed;
|
|
|
|
ogg->need_chains = FALSE;
|
|
|
|
GST_LOCK (ogg);
|
|
ogg->running = TRUE;
|
|
GST_UNLOCK (ogg);
|
|
|
|
/* and seek to configured positions without FLUSH */
|
|
gst_ogg_demux_perform_seek (ogg, TRUE, FALSE);
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "pull data %lld", ogg->offset);
|
|
if (ogg->offset == ogg->length) {
|
|
ret = GST_FLOW_OK;
|
|
/* segment playback just posts a segment end message instead of
|
|
* pushing out EOS. */
|
|
/* FIXME, need to be done somewhere else where we
|
|
* can check against segment_stop time. */
|
|
if (ogg->segment_play) {
|
|
gst_element_post_message (GST_ELEMENT (ogg),
|
|
gst_message_new_segment_done (GST_OBJECT (ogg), GST_FORMAT_TIME,
|
|
ogg->total_time));
|
|
} else {
|
|
gst_ogg_demux_send_event (ogg, gst_event_new_eos ());
|
|
}
|
|
goto pause;
|
|
}
|
|
|
|
ret = gst_pad_pull_range (ogg->sinkpad, ogg->offset, CHUNKSIZE, &buffer);
|
|
if (ret != GST_FLOW_OK)
|
|
goto pause;
|
|
|
|
ogg->offset += GST_BUFFER_SIZE (buffer);
|
|
|
|
ret = gst_ogg_demux_chain (ogg->sinkpad, buffer);
|
|
if (ret != GST_FLOW_OK)
|
|
goto pause;
|
|
|
|
return;
|
|
|
|
/* ERRORS */
|
|
chain_read_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("could not read chains"));
|
|
ret = GST_FLOW_ERROR;
|
|
goto pause;
|
|
}
|
|
pause:
|
|
{
|
|
GST_LOG_OBJECT (ogg, "pausing task, reason %s", gst_flow_get_name (ret));
|
|
gst_pad_pause_task (ogg->sinkpad);
|
|
if (GST_FLOW_IS_FATAL (ret)) {
|
|
gst_ogg_demux_send_event (ogg, gst_event_new_eos ());
|
|
GST_ELEMENT_ERROR (ogg, STREAM, FAILED,
|
|
(_("Internal data stream error.")),
|
|
("stream stopped, reason %s", gst_flow_get_name (ret)));
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_clear_chains (GstOggDemux * ogg)
|
|
{
|
|
gint i;
|
|
|
|
gst_ogg_demux_deactivate_current_chain (ogg);
|
|
|
|
GST_CHAIN_LOCK (ogg);
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
gst_ogg_chain_free (chain);
|
|
}
|
|
ogg->chains = g_array_set_size (ogg->chains, 0);
|
|
GST_CHAIN_UNLOCK (ogg);
|
|
}
|
|
|
|
/* this function is called when the pad is activated and should start
|
|
* processing data.
|
|
*
|
|
* We check if we can do random access to decide if we work push or
|
|
* pull based.
|
|
*/
|
|
static gboolean
|
|
gst_ogg_demux_sink_activate (GstPad * sinkpad)
|
|
{
|
|
if (gst_pad_check_pull_range (sinkpad)) {
|
|
return gst_pad_activate_pull (sinkpad, TRUE);
|
|
} else {
|
|
return gst_pad_activate_push (sinkpad, TRUE);
|
|
}
|
|
}
|
|
|
|
/* this function gets called when we activate ourselves in push mode.
|
|
* We cannot seek (ourselves) in the stream */
|
|
static gboolean
|
|
gst_ogg_demux_sink_activate_push (GstPad * sinkpad, gboolean active)
|
|
{
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (sinkpad));
|
|
|
|
ogg->seekable = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* this function gets called when we activate ourselves in pull mode.
|
|
* We can perform random access to the resource and we start a task
|
|
* to start reading */
|
|
static gboolean
|
|
gst_ogg_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
|
|
{
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (sinkpad));
|
|
|
|
if (active) {
|
|
ogg->need_chains = TRUE;
|
|
ogg->seekable = TRUE;
|
|
|
|
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_ogg_demux_loop,
|
|
sinkpad);
|
|
} else {
|
|
return gst_pad_stop_task (sinkpad);
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_ogg_demux_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstOggDemux *ogg;
|
|
GstStateChangeReturn result = GST_STATE_CHANGE_FAILURE;
|
|
|
|
ogg = GST_OGG_DEMUX (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
ogg_sync_init (&ogg->sync);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
ogg_sync_reset (&ogg->sync);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
result = parent_class->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_ogg_demux_clear_chains (ogg);
|
|
GST_LOCK (ogg);
|
|
ogg->running = FALSE;
|
|
GST_UNLOCK (ogg);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
ogg_sync_clear (&ogg->sync);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*** typefinding **************************************************************/
|
|
/* ogg supports its own typefinding because the ogg spec defines that the first
|
|
* packet of an ogg stream must identify the stream. Therefore ogg can use a
|
|
* simplified approach at typefinding.
|
|
*/
|
|
typedef struct
|
|
{
|
|
ogg_packet *packet;
|
|
guint best_probability;
|
|
GstCaps *caps;
|
|
}
|
|
OggTypeFind;
|
|
|
|
static guint8 *
|
|
ogg_find_peek (gpointer data, gint64 offset, guint size)
|
|
{
|
|
OggTypeFind *find = (OggTypeFind *) data;
|
|
|
|
/* We don't support negative offset (from stream end); nothing embedded in ogg
|
|
* ever needs them */
|
|
if (offset >= 0 && offset + size <= find->packet->bytes) {
|
|
return ((guint8 *) find->packet->packet) + offset;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
static void
|
|
ogg_find_suggest (gpointer data, guint probability, const GstCaps * caps)
|
|
{
|
|
OggTypeFind *find = (OggTypeFind *) data;
|
|
|
|
if (probability > find->best_probability) {
|
|
gst_caps_replace (&find->caps, gst_caps_copy (caps));
|
|
find->best_probability = probability;
|
|
}
|
|
}
|
|
static GstCaps *
|
|
gst_ogg_type_find (ogg_packet * packet)
|
|
{
|
|
GstTypeFind gst_find;
|
|
OggTypeFind find;
|
|
GList *walk, *type_list = NULL;
|
|
|
|
walk = type_list = gst_type_find_factory_get_list ();
|
|
|
|
find.packet = packet;
|
|
find.best_probability = 0;
|
|
find.caps = NULL;
|
|
gst_find.data = &find;
|
|
gst_find.peek = ogg_find_peek;
|
|
gst_find.suggest = ogg_find_suggest;
|
|
gst_find.get_length = NULL;
|
|
|
|
while (walk) {
|
|
GstTypeFindFactory *factory = GST_TYPE_FIND_FACTORY (walk->data);
|
|
|
|
gst_type_find_factory_call_function (factory, &gst_find);
|
|
if (find.best_probability >= GST_TYPE_FIND_MAXIMUM)
|
|
break;
|
|
walk = g_list_next (walk);
|
|
}
|
|
|
|
if (find.best_probability > 0)
|
|
return find.caps;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
gboolean
|
|
gst_ogg_demux_plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_debug, "oggdemux", 0, "ogg demuxer");
|
|
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_setup_debug, "oggdemux_setup", 0,
|
|
"ogg demuxer setup stage when parsing pipeline");
|
|
|
|
return gst_element_register (plugin, "oggdemux", GST_RANK_PRIMARY,
|
|
GST_TYPE_OGG_DEMUX);
|
|
}
|
|
|
|
/* prints all info about the element */
|
|
#undef GST_CAT_DEFAULT
|
|
#define GST_CAT_DEFAULT gst_ogg_demux_setup_debug
|
|
|
|
#ifdef GST_DISABLE_GST_DEBUG
|
|
|
|
static void
|
|
gst_ogg_print (GstOggDemux * ogg)
|
|
{
|
|
/* NOP */
|
|
}
|
|
|
|
#else /* !GST_DISABLE_GST_DEBUG */
|
|
|
|
static void
|
|
gst_ogg_print (GstOggDemux * ogg)
|
|
{
|
|
guint j, i;
|
|
|
|
GST_INFO_OBJECT (ogg, "%u chains", ogg->chains->len);
|
|
GST_INFO_OBJECT (ogg, " total time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (ogg->total_time));
|
|
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
GST_INFO_OBJECT (ogg, " chain %d (%u streams):", i, chain->streams->len);
|
|
GST_INFO_OBJECT (ogg, " offset: %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT,
|
|
chain->offset, chain->end_offset);
|
|
GST_INFO_OBJECT (ogg, " begin time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->begin_time));
|
|
GST_INFO_OBJECT (ogg, " total time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->total_time));
|
|
GST_INFO_OBJECT (ogg, " segment start: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->segment_start));
|
|
GST_INFO_OBJECT (ogg, " segment stop: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->segment_stop));
|
|
|
|
for (j = 0; j < chain->streams->len; j++) {
|
|
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, j);
|
|
|
|
GST_INFO_OBJECT (ogg, " stream %08lx:", stream->serialno);
|
|
GST_INFO_OBJECT (ogg, " start time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->start_time));
|
|
GST_INFO_OBJECT (ogg, " first granulepos: %" G_GINT64_FORMAT,
|
|
stream->first_granule);
|
|
GST_INFO_OBJECT (ogg, " first time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->first_time));
|
|
}
|
|
}
|
|
}
|
|
#endif /* GST_DISABLE_GST_DEBUG */
|