1 /*****************************************************************************
2 * ogg.c : ogg stream demux module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2003 the VideoLAN team
7 * Authors: Gildas Bazin <gbazin@netcourrier.com>
8 * Andre Pang <Andre.Pang@csiro.au> (Annodex support)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
29 #include <vlc/input.h>
36 /*****************************************************************************
38 *****************************************************************************/
39 static int Open ( vlc_object_t * );
40 static void Close( vlc_object_t * );
43 set_description( _("Ogg stream demuxer" ) );
44 set_category( CAT_INPUT );
45 set_subcategory( SUBCAT_INPUT_DEMUX );
46 set_capability( "demux2", 50 );
47 set_callbacks( Open, Close );
48 add_shortcut( "ogg" );
52 /*****************************************************************************
53 * Definitions of structures and functions used by this plugins
54 *****************************************************************************/
55 typedef struct logical_stream_s
57 ogg_stream_state os; /* logical stream of packets */
65 /* the header of some logical streams (eg vorbis) contain essential
66 * data for the decoder. We back them up here in case we need to re-feed
67 * them to the decoder. */
73 /* program clock reference (in units of 90kHz) derived from the previous
76 mtime_t i_interpolated_pcr;
77 mtime_t i_previous_pcr;
81 int i_theora_keyframe_granule_shift;
83 /* for Annodex logical bitstreams */
84 int secondary_header_packets;
90 ogg_sync_state oy; /* sync and verify incoming physical bitstream */
92 int i_streams; /* number of logical bitstreams */
93 logical_stream_t **pp_stream; /* pointer to an array of logical streams */
95 /* program clock reference (in units of 90kHz) derived from the pcr of
106 /* OggDS headers for the new header format (used in ogm files) */
107 typedef struct stream_header_video
111 } stream_header_video;
113 typedef struct stream_header_audio
115 ogg_int16_t channels;
116 ogg_int16_t blockalign;
117 ogg_int32_t avgbytespersec;
118 } stream_header_audio;
120 typedef struct stream_header
125 ogg_int32_t size; /* size of the structure */
127 ogg_int64_t time_unit; /* in reference time */
128 ogg_int64_t samples_per_unit;
129 ogg_int32_t default_len; /* in media time */
131 ogg_int32_t buffersize;
132 ogg_int16_t bits_per_sample;
137 stream_header_video video;
139 stream_header_audio audio;
143 #define OGG_BLOCK_SIZE 4096
145 /* Some defines from OggDS */
146 #define PACKET_TYPE_HEADER 0x01
147 #define PACKET_TYPE_BITS 0x07
148 #define PACKET_LEN_BITS01 0xc0
149 #define PACKET_LEN_BITS2 0x02
150 #define PACKET_IS_SYNCPOINT 0x08
152 /*****************************************************************************
154 *****************************************************************************/
155 static int Demux ( demux_t * );
156 static int Control( demux_t *, int, va_list );
158 /* Bitstream manipulation */
159 static int Ogg_ReadPage ( demux_t *, ogg_page * );
160 static void Ogg_UpdatePCR ( logical_stream_t *, ogg_packet * );
161 static void Ogg_DecodePacket ( demux_t *, logical_stream_t *, ogg_packet * );
163 static int Ogg_BeginningOfStream( demux_t *p_demux );
164 static int Ogg_FindLogicalStreams( demux_t *p_demux );
165 static void Ogg_EndOfStream( demux_t *p_demux );
167 /* Logical bitstream headers */
168 static void Ogg_ReadTheoraHeader( logical_stream_t *, ogg_packet * );
169 static void Ogg_ReadVorbisHeader( logical_stream_t *, ogg_packet * );
170 static void Ogg_ReadSpeexHeader( logical_stream_t *, ogg_packet * );
171 static void Ogg_ReadFlacHeader( demux_t *, logical_stream_t *, ogg_packet * );
172 static void Ogg_ReadAnnodexHeader( vlc_object_t *, logical_stream_t *, ogg_packet * );
174 /*****************************************************************************
175 * Open: initializes ogg demux structures
176 *****************************************************************************/
177 static int Open( vlc_object_t * p_this )
179 demux_t *p_demux = (demux_t *)p_this;
184 /* Check if we are dealing with an ogg stream */
185 if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
186 if( strcmp( p_demux->psz_demux, "ogg" ) && memcmp( p_peek, "OggS", 4 ) )
191 /* Set exported functions */
192 p_demux->pf_demux = Demux;
193 p_demux->pf_control = Control;
194 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
196 memset( p_sys, 0, sizeof( demux_sys_t ) );
197 p_sys->i_bitrate = 0;
198 p_sys->pp_stream = NULL;
200 /* Begnning of stream, tell the demux to look for elementary streams. */
203 /* Initialize the Ogg physical bitstream parser */
204 ogg_sync_init( &p_sys->oy );
209 /*****************************************************************************
210 * Close: frees unused data
211 *****************************************************************************/
212 static void Close( vlc_object_t *p_this )
214 demux_t *p_demux = (demux_t *)p_this;
215 demux_sys_t *p_sys = p_demux->p_sys ;
217 /* Cleanup the bitstream parser */
218 ogg_sync_clear( &p_sys->oy );
220 Ogg_EndOfStream( p_demux );
225 /*****************************************************************************
226 * Demux: reads and demuxes data packets
227 *****************************************************************************
228 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
229 *****************************************************************************/
230 static int Demux( demux_t * p_demux )
232 demux_sys_t *p_sys = p_demux->p_sys;
234 ogg_packet oggpacket;
238 if( p_sys->i_eos == p_sys->i_streams )
242 msg_Dbg( p_demux, "end of a group of logical streams" );
243 Ogg_EndOfStream( p_demux );
247 if( Ogg_BeginningOfStream( p_demux ) != VLC_SUCCESS ) return 0;
249 msg_Dbg( p_demux, "beginning of a group of logical streams" );
250 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
254 * Demux an ogg page from the stream
256 if( Ogg_ReadPage( p_demux, &oggpage ) != VLC_SUCCESS )
261 /* Test for End of Stream */
262 if( ogg_page_eos( &oggpage ) ) p_sys->i_eos++;
265 for( i_stream = 0; i_stream < p_sys->i_streams; i_stream++ )
267 logical_stream_t *p_stream = p_sys->pp_stream[i_stream];
269 if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
272 while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
274 /* Read info from any secondary header packets, if there are any */
275 if( p_stream->secondary_header_packets > 0 )
277 if( p_stream->fmt.i_codec == VLC_FOURCC('t','h','e','o') &&
278 oggpacket.bytes >= 7 &&
279 ! memcmp( &oggpacket.packet[1], "theora", 6 ) )
281 Ogg_ReadTheoraHeader( p_stream, &oggpacket );
282 p_stream->secondary_header_packets = 0;
284 else if( p_stream->fmt.i_codec == VLC_FOURCC('v','o','r','b') &&
285 oggpacket.bytes >= 7 &&
286 ! memcmp( &oggpacket.packet[1], "vorbis", 6 ) )
288 Ogg_ReadVorbisHeader( p_stream, &oggpacket );
289 p_stream->secondary_header_packets = 0;
291 else if ( p_stream->fmt.i_codec == VLC_FOURCC('c','m','m','l') )
293 p_stream->secondary_header_packets = 0;
297 if( p_stream->b_reinit )
299 /* If synchro is re-initialized we need to drop all the packets
300 * until we find a new dated one. */
301 Ogg_UpdatePCR( p_stream, &oggpacket );
303 if( p_stream->i_pcr >= 0 )
305 p_stream->b_reinit = 0;
309 p_stream->i_interpolated_pcr = -1;
313 /* An Ogg/vorbis packet contains an end date granulepos */
314 if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) ||
315 p_stream->fmt.i_codec == VLC_FOURCC( 's','p','x',' ' ) ||
316 p_stream->fmt.i_codec == VLC_FOURCC( 'f','l','a','c' ) )
318 if( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
320 Ogg_DecodePacket( p_demux, p_stream, &oggpacket );
324 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
331 Ogg_DecodePacket( p_demux, p_stream, &oggpacket );
336 i_stream = 0; p_sys->i_pcr = -1;
337 for( ; i_stream < p_sys->i_streams; i_stream++ )
339 logical_stream_t *p_stream = p_sys->pp_stream[i_stream];
341 if( p_stream->fmt.i_cat == SPU_ES )
343 if( p_stream->i_interpolated_pcr < 0 )
346 if( p_sys->i_pcr < 0 || p_stream->i_interpolated_pcr < p_sys->i_pcr )
347 p_sys->i_pcr = p_stream->i_interpolated_pcr;
350 if( p_sys->i_pcr >= 0 )
352 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
359 /*****************************************************************************
361 *****************************************************************************/
362 static int Control( demux_t *p_demux, int i_query, va_list args )
364 demux_sys_t *p_sys = p_demux->p_sys;
371 pi64 = (int64_t*)va_arg( args, int64_t * );
372 *pi64 = p_sys->i_pcr;
378 case DEMUX_SET_POSITION:
379 for( i = 0; i < p_sys->i_streams; i++ )
381 logical_stream_t *p_stream = p_sys->pp_stream[i];
383 /* we'll trash all the data until we find the next pcr */
384 p_stream->b_reinit = 1;
385 p_stream->i_pcr = -1;
386 p_stream->i_interpolated_pcr = -1;
387 ogg_stream_reset( &p_stream->os );
389 ogg_sync_reset( &p_sys->oy );
392 return demux2_vaControlHelper( p_demux->s, 0, -1, p_sys->i_bitrate,
397 /****************************************************************************
398 * Ogg_ReadPage: Read a full Ogg page from the physical bitstream.
399 ****************************************************************************
400 * Returns VLC_SUCCESS if a page has been read. An error might happen if we
401 * are at the end of stream.
402 ****************************************************************************/
403 static int Ogg_ReadPage( demux_t *p_demux, ogg_page *p_oggpage )
405 demux_sys_t *p_ogg = p_demux->p_sys ;
409 while( ogg_sync_pageout( &p_ogg->oy, p_oggpage ) != 1 )
411 p_buffer = ogg_sync_buffer( &p_ogg->oy, OGG_BLOCK_SIZE );
413 i_read = stream_Read( p_demux->s, p_buffer, OGG_BLOCK_SIZE );
417 ogg_sync_wrote( &p_ogg->oy, i_read );
423 /****************************************************************************
424 * Ogg_UpdatePCR: update the PCR (90kHz program clock reference) for the
426 ****************************************************************************/
427 static void Ogg_UpdatePCR( logical_stream_t *p_stream,
428 ogg_packet *p_oggpacket )
430 /* Convert the granulepos into a pcr */
431 if( p_oggpacket->granulepos >= 0 )
433 if( p_stream->fmt.i_codec != VLC_FOURCC( 't','h','e','o' ) )
435 p_stream->i_pcr = p_oggpacket->granulepos * I64C(1000000)
440 ogg_int64_t iframe = p_oggpacket->granulepos >>
441 p_stream->i_theora_keyframe_granule_shift;
442 ogg_int64_t pframe = p_oggpacket->granulepos -
443 ( iframe << p_stream->i_theora_keyframe_granule_shift );
445 p_stream->i_pcr = ( iframe + pframe ) * I64C(1000000)
449 p_stream->i_interpolated_pcr = p_stream->i_pcr;
453 p_stream->i_pcr = -1;
455 /* no granulepos available, try to interpolate the pcr.
456 * If we can't then don't touch the old value. */
457 if( p_stream->fmt.i_cat == VIDEO_ES )
458 /* 1 frame per packet */
459 p_stream->i_interpolated_pcr += (I64C(1000000) / p_stream->f_rate);
460 else if( p_stream->fmt.i_bitrate )
461 p_stream->i_interpolated_pcr +=
462 ( p_oggpacket->bytes * I64C(1000000) /
463 p_stream->fmt.i_bitrate / 8 );
467 /****************************************************************************
468 * Ogg_DecodePacket: Decode an Ogg packet.
469 ****************************************************************************/
470 static void Ogg_DecodePacket( demux_t *p_demux,
471 logical_stream_t *p_stream,
472 ogg_packet *p_oggpacket )
475 vlc_bool_t b_selected;
476 int i_header_len = 0;
477 mtime_t i_pts = -1, i_interpolated_pts;
480 if( !p_oggpacket->bytes )
482 msg_Dbg( p_demux, "discarding 0 sized packet" );
486 if( p_oggpacket->bytes >= 7 &&
487 ! memcmp ( &p_oggpacket->packet[0], "Annodex", 7 ) )
489 /* it's an Annodex packet -- skip it (do nothing) */
492 else if( p_oggpacket->bytes >= 7 &&
493 ! memcmp ( &p_oggpacket->packet[0], "AnxData", 7 ) )
495 /* it's an AnxData packet -- skip it (do nothing) */
499 if( p_stream->fmt.i_codec == VLC_FOURCC( 's','u','b','t' ) &&
500 p_oggpacket->packet[0] & PACKET_TYPE_BITS ) return;
502 /* Check the ES is selected */
503 es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
504 p_stream->p_es, &b_selected );
506 if( p_stream->b_force_backup )
509 vlc_bool_t b_store_size = VLC_TRUE;
511 p_stream->i_packets_backup++;
512 switch( p_stream->fmt.i_codec )
514 case VLC_FOURCC( 'v','o','r','b' ):
515 case VLC_FOURCC( 's','p','x',' ' ):
516 case VLC_FOURCC( 't','h','e','o' ):
517 if( p_stream->i_packets_backup == 3 ) p_stream->b_force_backup = 0;
520 case VLC_FOURCC( 'f','l','a','c' ):
521 if( !p_stream->fmt.audio.i_rate && p_stream->i_packets_backup == 2 )
523 Ogg_ReadFlacHeader( p_demux, p_stream, p_oggpacket );
524 p_stream->b_force_backup = 0;
526 else if( p_stream->fmt.audio.i_rate )
528 p_stream->b_force_backup = 0;
529 if( p_oggpacket->bytes >= 9 )
531 p_oggpacket->packet += 9;
532 p_oggpacket->bytes -= 9;
535 b_store_size = VLC_FALSE;
539 p_stream->b_force_backup = 0;
543 /* Backup the ogg packet (likely an header packet) */
544 p_stream->p_headers =
545 realloc( p_stream->p_headers, p_stream->i_headers +
546 p_oggpacket->bytes + (b_store_size ? 2 : 0) );
547 p_extra = p_stream->p_headers + p_stream->i_headers;
550 *(p_extra++) = p_oggpacket->bytes >> 8;
551 *(p_extra++) = p_oggpacket->bytes & 0xFF;
553 memcpy( p_extra, p_oggpacket->packet, p_oggpacket->bytes );
554 p_stream->i_headers += p_oggpacket->bytes + (b_store_size ? 2 : 0);
556 if( !p_stream->b_force_backup )
558 /* Last header received, commit changes */
559 p_stream->fmt.i_extra = p_stream->i_headers;
560 p_stream->fmt.p_extra =
561 realloc( p_stream->fmt.p_extra, p_stream->i_headers );
562 memcpy( p_stream->fmt.p_extra, p_stream->p_headers,
563 p_stream->i_headers );
564 es_out_Control( p_demux->out, ES_OUT_SET_FMT,
565 p_stream->p_es, &p_stream->fmt );
568 b_selected = VLC_FALSE; /* Discard the header packet */
571 /* Convert the pcr into a pts */
572 if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) ||
573 p_stream->fmt.i_codec == VLC_FOURCC( 's','p','x',' ' ) ||
574 p_stream->fmt.i_codec == VLC_FOURCC( 'f','l','a','c' ) )
576 if( p_stream->i_pcr >= 0 )
578 /* This is for streams where the granulepos of the header packets
579 * doesn't match these of the data packets (eg. ogg web radios). */
580 if( p_stream->i_previous_pcr == 0 &&
581 p_stream->i_pcr > 3 * DEFAULT_PTS_DELAY )
583 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
585 /* Call the pace control */
586 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
590 p_stream->i_previous_pcr = p_stream->i_pcr;
592 /* The granulepos is the end date of the sample */
593 i_pts = p_stream->i_pcr;
597 /* Convert the granulepos into the next pcr */
598 i_interpolated_pts = p_stream->i_interpolated_pcr;
599 Ogg_UpdatePCR( p_stream, p_oggpacket );
601 if( p_stream->i_pcr >= 0 )
603 /* This is for streams where the granulepos of the header packets
604 * doesn't match these of the data packets (eg. ogg web radios). */
605 if( p_stream->i_previous_pcr == 0 &&
606 p_stream->i_pcr > 3 * DEFAULT_PTS_DELAY )
608 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
610 /* Call the pace control */
611 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_stream->i_pcr );
615 if( p_stream->fmt.i_codec != VLC_FOURCC( 'v','o','r','b' ) &&
616 p_stream->fmt.i_codec != VLC_FOURCC( 's','p','x',' ' ) &&
617 p_stream->fmt.i_codec != VLC_FOURCC( 'f','l','a','c' ) &&
618 p_stream->i_pcr >= 0 )
620 p_stream->i_previous_pcr = p_stream->i_pcr;
622 /* The granulepos is the start date of the sample */
623 i_pts = p_stream->i_pcr;
628 /* This stream isn't currently selected so we don't need to decode it,
629 * but we did need to store its pcr as it might be selected later on */
633 if( p_oggpacket->bytes <= 0 )
636 if( !( p_block = block_New( p_demux, p_oggpacket->bytes ) ) ) return;
639 if( i_pts == 0 ) i_pts = 1;
640 else if( i_pts == -1 && i_interpolated_pts == 0 ) i_pts = 1;
641 else if( i_pts == -1 ) i_pts = 0;
643 if( p_stream->fmt.i_cat == AUDIO_ES )
644 p_block->i_dts = p_block->i_pts = i_pts;
645 else if( p_stream->fmt.i_cat == SPU_ES )
647 p_block->i_dts = p_block->i_pts = i_pts;
648 p_block->i_length = 0;
650 else if( p_stream->fmt.i_codec == VLC_FOURCC( 't','h','e','o' ) )
651 p_block->i_dts = p_block->i_pts = i_pts;
654 p_block->i_dts = i_pts;
658 if( p_stream->fmt.i_codec != VLC_FOURCC( 'v','o','r','b' ) &&
659 p_stream->fmt.i_codec != VLC_FOURCC( 's','p','x',' ' ) &&
660 p_stream->fmt.i_codec != VLC_FOURCC( 'f','l','a','c' ) &&
661 p_stream->fmt.i_codec != VLC_FOURCC( 't','a','r','k' ) &&
662 p_stream->fmt.i_codec != VLC_FOURCC( 't','h','e','o' ) &&
663 p_stream->fmt.i_codec != VLC_FOURCC( 'c','m','m','l' ) )
665 /* We remove the header from the packet */
666 i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
667 i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
669 if( p_stream->fmt.i_codec == VLC_FOURCC( 's','u','b','t' ))
671 /* But with subtitles we need to retrieve the duration first */
674 if( i_header_len > 0 && p_oggpacket->bytes >= i_header_len + 1 )
676 for( i = 0, lenbytes = 0; i < i_header_len; i++ )
678 lenbytes = lenbytes << 8;
679 lenbytes += *(p_oggpacket->packet + i_header_len - i);
682 if( p_oggpacket->bytes - 1 - i_header_len > 2 ||
683 ( p_oggpacket->packet[i_header_len + 1] != ' ' &&
684 p_oggpacket->packet[i_header_len + 1] != 0 &&
685 p_oggpacket->packet[i_header_len + 1] != '\n' &&
686 p_oggpacket->packet[i_header_len + 1] != '\r' ) )
688 p_block->i_length = (mtime_t)lenbytes * 1000;
693 if( p_block->i_buffer >= i_header_len )
694 p_block->i_buffer -= i_header_len;
696 p_block->i_buffer = 0;
699 if( p_stream->fmt.i_codec == VLC_FOURCC( 't','a','r','k' ) )
701 /* FIXME: the biggest hack I've ever done */
702 msg_Warn( p_demux, "tarkin pts: "I64Fd", granule: "I64Fd,
703 p_block->i_pts, p_block->i_dts );
707 memcpy( p_block->p_buffer, p_oggpacket->packet + i_header_len,
708 p_oggpacket->bytes - i_header_len );
710 es_out_Send( p_demux->out, p_stream->p_es, p_block );
713 /****************************************************************************
714 * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
715 * stream and fill p_ogg.
716 *****************************************************************************
717 * The initial page of a logical stream is marked as a 'bos' page.
718 * Furthermore, the Ogg specification mandates that grouped bitstreams begin
719 * together and all of the initial pages must appear before any data pages.
721 * On success this function returns VLC_SUCCESS.
722 ****************************************************************************/
723 static int Ogg_FindLogicalStreams( demux_t *p_demux )
725 demux_sys_t *p_ogg = p_demux->p_sys ;
726 ogg_packet oggpacket;
730 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
732 while( Ogg_ReadPage( p_demux, &oggpage ) == VLC_SUCCESS )
734 if( ogg_page_bos( &oggpage ) )
737 /* All is wonderful in our fine fine little world.
738 * We found the beginning of our first logical stream. */
739 while( ogg_page_bos( &oggpage ) )
743 realloc( p_ogg->pp_stream, p_ogg->i_streams *
744 sizeof(logical_stream_t *) );
746 p_stream = malloc( sizeof(logical_stream_t) );
747 memset( p_stream, 0, sizeof(logical_stream_t) );
748 p_stream->p_headers = 0;
749 p_stream->secondary_header_packets = 0;
751 es_format_Init( &p_stream->fmt, 0, 0 );
753 /* Setup the logical stream */
754 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
755 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
757 /* Extract the initial header from the first page and verify
758 * the codec type of tis Ogg bitstream */
759 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
761 /* error. stream version mismatch perhaps */
762 msg_Err( p_demux, "error reading first page of "
763 "Ogg bitstream data" );
767 /* FIXME: check return value */
768 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
770 /* Check for Vorbis header */
771 if( oggpacket.bytes >= 7 &&
772 ! memcmp( &oggpacket.packet[1], "vorbis", 6 ) )
774 Ogg_ReadVorbisHeader( p_stream, &oggpacket );
775 msg_Dbg( p_demux, "found vorbis header" );
777 /* Check for Speex header */
778 else if( oggpacket.bytes >= 7 &&
779 ! memcmp( &oggpacket.packet[0], "Speex", 5 ) )
781 Ogg_ReadSpeexHeader( p_stream, &oggpacket );
782 msg_Dbg( p_demux, "found speex header, channels: %i, "
783 "rate: %i, bitrate: %i",
784 p_stream->fmt.audio.i_channels,
785 (int)p_stream->f_rate, p_stream->fmt.i_bitrate );
787 /* Check for Flac header (< version 1.1.1) */
788 else if( oggpacket.bytes >= 4 &&
789 ! memcmp( &oggpacket.packet[0], "fLaC", 4 ) )
791 msg_Dbg( p_demux, "found FLAC header" );
793 /* Grrrr!!!! Did they really have to put all the
794 * important info in the second header packet!!!
795 * (STREAMINFO metadata is in the following packet) */
796 p_stream->b_force_backup = 1;
798 p_stream->fmt.i_cat = AUDIO_ES;
799 p_stream->fmt.i_codec = VLC_FOURCC( 'f','l','a','c' );
801 /* Check for Flac header (>= version 1.1.1) */
802 else if( oggpacket.bytes >= 13 && oggpacket.packet[0] ==0x7F &&
803 ! memcmp( &oggpacket.packet[1], "FLAC", 4 ) &&
804 ! memcmp( &oggpacket.packet[9], "fLaC", 4 ) )
806 int i_packets = ((int)oggpacket.packet[7]) << 8 |
808 msg_Dbg( p_demux, "found FLAC header version %i.%i "
809 "(%i header packets)",
810 oggpacket.packet[5], oggpacket.packet[6],
813 p_stream->b_force_backup = 1;
815 p_stream->fmt.i_cat = AUDIO_ES;
816 p_stream->fmt.i_codec = VLC_FOURCC( 'f','l','a','c' );
817 oggpacket.packet += 13; oggpacket.bytes -= 13;
818 Ogg_ReadFlacHeader( p_demux, p_stream, &oggpacket );
820 /* Check for Theora header */
821 else if( oggpacket.bytes >= 7 &&
822 ! memcmp( &oggpacket.packet[1], "theora", 6 ) )
824 Ogg_ReadTheoraHeader( p_stream, &oggpacket );
827 "found theora header, bitrate: %i, rate: %f",
828 p_stream->fmt.i_bitrate, p_stream->f_rate );
830 /* Check for Tarkin header */
831 else if( oggpacket.bytes >= 7 &&
832 ! memcmp( &oggpacket.packet[1], "tarkin", 6 ) )
836 msg_Dbg( p_demux, "found tarkin header" );
837 p_stream->fmt.i_cat = VIDEO_ES;
838 p_stream->fmt.i_codec = VLC_FOURCC( 't','a','r','k' );
840 /* Cheat and get additionnal info ;) */
841 oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
842 oggpack_adv( &opb, 88 );
843 oggpack_adv( &opb, 104 );
844 p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
845 p_stream->f_rate = 2; /* FIXME */
847 "found tarkin header, bitrate: %i, rate: %f",
848 p_stream->fmt.i_bitrate, p_stream->f_rate );
850 /* Check for Annodex header */
851 else if( oggpacket.bytes >= 7 &&
852 ! memcmp( &oggpacket.packet[0], "Annodex", 7 ) )
854 Ogg_ReadAnnodexHeader( VLC_OBJECT(p_demux), p_stream,
856 /* kill annodex track */
860 /* Check for Annodex header */
861 else if( oggpacket.bytes >= 7 &&
862 ! memcmp( &oggpacket.packet[0], "AnxData", 7 ) )
864 Ogg_ReadAnnodexHeader( VLC_OBJECT(p_demux), p_stream,
867 else if( oggpacket.bytes >= 142 &&
868 !memcmp( &oggpacket.packet[1],
869 "Direct Show Samples embedded in Ogg", 35 ))
871 /* Old header type */
873 /* Check for video header (old format) */
874 if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
875 oggpacket.bytes >= 184 )
877 p_stream->fmt.i_cat = VIDEO_ES;
878 p_stream->fmt.i_codec =
879 VLC_FOURCC( oggpacket.packet[68],
880 oggpacket.packet[69],
881 oggpacket.packet[70],
882 oggpacket.packet[71] );
883 msg_Dbg( p_demux, "found video header of type: %.4s",
884 (char *)&p_stream->fmt.i_codec );
886 p_stream->fmt.video.i_frame_rate = 10000000;
887 p_stream->fmt.video.i_frame_rate_base =
888 GetQWLE((oggpacket.packet+164));
889 p_stream->f_rate = 10000000.0 /
890 GetQWLE((oggpacket.packet+164));
891 p_stream->fmt.video.i_bits_per_pixel =
892 GetWLE((oggpacket.packet+182));
893 if( !p_stream->fmt.video.i_bits_per_pixel )
895 p_stream->fmt.video.i_bits_per_pixel = 24;
896 p_stream->fmt.video.i_width =
897 GetDWLE((oggpacket.packet+176));
898 p_stream->fmt.video.i_height =
899 GetDWLE((oggpacket.packet+180));
902 "fps: %f, width:%i; height:%i, bitcount:%i",
904 p_stream->fmt.video.i_width,
905 p_stream->fmt.video.i_height,
906 p_stream->fmt.video.i_bits_per_pixel);
909 /* Check for audio header (old format) */
910 else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
912 unsigned int i_extra_size;
913 unsigned int i_format_tag;
915 p_stream->fmt.i_cat = AUDIO_ES;
917 i_extra_size = GetWLE((oggpacket.packet+140));
920 p_stream->fmt.i_extra = i_extra_size;
921 p_stream->fmt.p_extra = malloc( i_extra_size );
922 memcpy( p_stream->fmt.p_extra,
923 oggpacket.packet + 142, i_extra_size );
926 i_format_tag = GetWLE((oggpacket.packet+124));
927 p_stream->fmt.audio.i_channels =
928 GetWLE((oggpacket.packet+126));
929 p_stream->f_rate = p_stream->fmt.audio.i_rate =
930 GetDWLE((oggpacket.packet+128));
931 p_stream->fmt.i_bitrate =
932 GetDWLE((oggpacket.packet+132)) * 8;
933 p_stream->fmt.audio.i_blockalign =
934 GetWLE((oggpacket.packet+136));
935 p_stream->fmt.audio.i_bitspersample =
936 GetWLE((oggpacket.packet+138));
938 wf_tag_to_fourcc( i_format_tag,
939 &p_stream->fmt.i_codec, 0 );
941 if( p_stream->fmt.i_codec ==
942 VLC_FOURCC('u','n','d','f') )
944 p_stream->fmt.i_codec = VLC_FOURCC( 'm', 's',
945 ( i_format_tag >> 8 ) & 0xff,
946 i_format_tag & 0xff );
949 msg_Dbg( p_demux, "found audio header of type: %.4s",
950 (char *)&p_stream->fmt.i_codec );
951 msg_Dbg( p_demux, "audio:0x%4.4x channels:%d %dHz "
952 "%dbits/sample %dkb/s",
954 p_stream->fmt.audio.i_channels,
955 p_stream->fmt.audio.i_rate,
956 p_stream->fmt.audio.i_bitspersample,
957 p_stream->fmt.i_bitrate / 1024 );
962 msg_Dbg( p_demux, "stream %d has an old header "
963 "but is of an unknown type", p_ogg->i_streams-1 );
968 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
969 == PACKET_TYPE_HEADER &&
970 oggpacket.bytes >= (int)sizeof(stream_header)+1 )
972 stream_header *st = (stream_header *)(oggpacket.packet+1);
974 /* Check for video header (new format) */
975 if( !strncmp( st->streamtype, "video", 5 ) )
977 p_stream->fmt.i_cat = VIDEO_ES;
979 /* We need to get rid of the header packet */
980 ogg_stream_packetout( &p_stream->os, &oggpacket );
982 p_stream->fmt.i_codec =
983 VLC_FOURCC( st->subtype[0], st->subtype[1],
984 st->subtype[2], st->subtype[3] );
985 msg_Dbg( p_demux, "found video header of type: %.4s",
986 (char *)&p_stream->fmt.i_codec );
988 p_stream->fmt.video.i_frame_rate = 10000000;
989 p_stream->fmt.video.i_frame_rate_base =
990 GetQWLE(&st->time_unit);
991 p_stream->f_rate = 10000000.0 /
992 GetQWLE(&st->time_unit);
993 p_stream->fmt.video.i_bits_per_pixel =
994 GetWLE(&st->bits_per_sample);
995 p_stream->fmt.video.i_width =
996 GetDWLE(&st->sh.video.width);
997 p_stream->fmt.video.i_height =
998 GetDWLE(&st->sh.video.height);
1001 "fps: %f, width:%i; height:%i, bitcount:%i",
1003 p_stream->fmt.video.i_width,
1004 p_stream->fmt.video.i_height,
1005 p_stream->fmt.video.i_bits_per_pixel );
1007 /* Check for audio header (new format) */
1008 else if( !strncmp( st->streamtype, "audio", 5 ) )
1013 p_stream->fmt.i_cat = AUDIO_ES;
1015 /* We need to get rid of the header packet */
1016 ogg_stream_packetout( &p_stream->os, &oggpacket );
1018 p_stream->fmt.i_extra = GetQWLE(&st->size) -
1019 sizeof(stream_header);
1020 if( p_stream->fmt.i_extra )
1022 p_stream->fmt.p_extra =
1023 malloc( p_stream->fmt.i_extra );
1024 memcpy( p_stream->fmt.p_extra, st + 1,
1025 p_stream->fmt.i_extra );
1028 memcpy( p_buffer, st->subtype, 4 );
1030 i_format_tag = strtol(p_buffer,NULL,16);
1031 p_stream->fmt.audio.i_channels =
1032 GetWLE(&st->sh.audio.channels);
1033 p_stream->f_rate = p_stream->fmt.audio.i_rate =
1034 GetQWLE(&st->samples_per_unit);
1035 p_stream->fmt.i_bitrate =
1036 GetDWLE(&st->sh.audio.avgbytespersec) * 8;
1037 p_stream->fmt.audio.i_blockalign =
1038 GetWLE(&st->sh.audio.blockalign);
1039 p_stream->fmt.audio.i_bitspersample =
1040 GetWLE(&st->bits_per_sample);
1042 wf_tag_to_fourcc( i_format_tag,
1043 &p_stream->fmt.i_codec, 0 );
1045 if( p_stream->fmt.i_codec ==
1046 VLC_FOURCC('u','n','d','f') )
1048 p_stream->fmt.i_codec = VLC_FOURCC( 'm', 's',
1049 ( i_format_tag >> 8 ) & 0xff,
1050 i_format_tag & 0xff );
1053 msg_Dbg( p_demux, "found audio header of type: %.4s",
1054 (char *)&p_stream->fmt.i_codec );
1055 msg_Dbg( p_demux, "audio:0x%4.4x channels:%d %dHz "
1056 "%dbits/sample %dkb/s",
1058 p_stream->fmt.audio.i_channels,
1059 p_stream->fmt.audio.i_rate,
1060 p_stream->fmt.audio.i_bitspersample,
1061 p_stream->fmt.i_bitrate / 1024 );
1063 /* Check for text (subtitles) header */
1064 else if( !strncmp(st->streamtype, "text", 4) )
1066 /* We need to get rid of the header packet */
1067 ogg_stream_packetout( &p_stream->os, &oggpacket );
1069 msg_Dbg( p_demux, "found text subtitles header" );
1070 p_stream->fmt.i_cat = SPU_ES;
1071 p_stream->fmt.i_codec = VLC_FOURCC('s','u','b','t');
1072 p_stream->f_rate = 1000; /* granulepos is in milisec */
1076 msg_Dbg( p_demux, "stream %d has a header marker "
1077 "but is of an unknown type", p_ogg->i_streams-1 );
1084 msg_Dbg( p_demux, "stream %d is of unknown type",
1085 p_ogg->i_streams-1 );
1090 if( Ogg_ReadPage( p_demux, &oggpage ) != VLC_SUCCESS )
1091 return VLC_EGENERIC;
1094 /* This is the first data page, which means we are now finished
1095 * with the initial pages. We just need to store it in the relevant
1097 for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1099 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1111 return VLC_EGENERIC;
1114 /****************************************************************************
1115 * Ogg_BeginningOfStream: Look for Beginning of Stream ogg pages and add
1116 * Elementary streams.
1117 ****************************************************************************/
1118 static int Ogg_BeginningOfStream( demux_t *p_demux )
1120 demux_sys_t *p_ogg = p_demux->p_sys ;
1123 /* Find the logical streams embedded in the physical stream and
1124 * initialize our p_ogg structure. */
1125 if( Ogg_FindLogicalStreams( p_demux ) != VLC_SUCCESS )
1127 msg_Warn( p_demux, "couldn't find any ogg logical stream" );
1128 return VLC_EGENERIC;
1131 p_ogg->i_bitrate = 0;
1133 for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1135 #define p_stream p_ogg->pp_stream[i_stream]
1136 p_stream->p_es = es_out_Add( p_demux->out, &p_stream->fmt );
1138 if( p_stream->fmt.i_codec == VLC_FOURCC('c','m','m','l') )
1140 /* Set the CMML stream active */
1141 es_out_Control( p_demux->out, ES_OUT_SET_ES, p_stream->p_es );
1144 p_ogg->i_bitrate += p_stream->fmt.i_bitrate;
1146 p_stream->i_pcr = p_stream->i_previous_pcr =
1147 p_stream->i_interpolated_pcr = -1;
1148 p_stream->b_reinit = 0;
1155 /****************************************************************************
1156 * Ogg_EndOfStream: clean up the ES when an End of Stream is detected.
1157 ****************************************************************************/
1158 static void Ogg_EndOfStream( demux_t *p_demux )
1160 demux_sys_t *p_ogg = p_demux->p_sys ;
1163 #define p_stream p_ogg->pp_stream[i_stream]
1164 for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1166 if( p_stream->p_es )
1167 es_out_Del( p_demux->out, p_stream->p_es );
1169 p_ogg->i_bitrate -= p_stream->fmt.i_bitrate;
1171 ogg_stream_clear( &p_ogg->pp_stream[i_stream]->os );
1172 if( p_ogg->pp_stream[i_stream]->p_headers)
1173 free( p_ogg->pp_stream[i_stream]->p_headers );
1175 es_format_Clean( &p_stream->fmt );
1177 free( p_ogg->pp_stream[i_stream] );
1182 if( p_ogg->pp_stream ) free( p_ogg->pp_stream );
1183 p_ogg->pp_stream = NULL;
1184 p_ogg->i_streams = 0;
1187 static void Ogg_ReadTheoraHeader( logical_stream_t *p_stream,
1188 ogg_packet *p_oggpacket )
1191 int i_fps_numerator;
1192 int i_fps_denominator;
1193 int i_keyframe_frequency_force;
1195 p_stream->fmt.i_cat = VIDEO_ES;
1196 p_stream->fmt.i_codec = VLC_FOURCC( 't','h','e','o' );
1198 /* Signal that we want to keep a backup of the theora
1199 * stream headers. They will be used when switching between
1201 p_stream->b_force_backup = 1;
1203 /* Cheat and get additionnal info ;) */
1204 bs_init( &bitstream, p_oggpacket->packet, p_oggpacket->bytes );
1205 bs_skip( &bitstream, 56 );
1206 bs_read( &bitstream, 8 ); /* major version num */
1207 bs_read( &bitstream, 8 ); /* minor version num */
1208 bs_read( &bitstream, 8 ); /* subminor version num */
1209 bs_read( &bitstream, 16 ) /*<< 4*/; /* width */
1210 bs_read( &bitstream, 16 ) /*<< 4*/; /* height */
1211 bs_read( &bitstream, 24 ); /* frame width */
1212 bs_read( &bitstream, 24 ); /* frame height */
1213 bs_read( &bitstream, 8 ); /* x offset */
1214 bs_read( &bitstream, 8 ); /* y offset */
1216 i_fps_numerator = bs_read( &bitstream, 32 );
1217 i_fps_denominator = bs_read( &bitstream, 32 );
1218 bs_read( &bitstream, 24 ); /* aspect_numerator */
1219 bs_read( &bitstream, 24 ); /* aspect_denominator */
1221 p_stream->fmt.video.i_frame_rate = i_fps_numerator;
1222 p_stream->fmt.video.i_frame_rate_base = i_fps_denominator;
1224 bs_read( &bitstream, 8 ); /* colorspace */
1225 p_stream->fmt.i_bitrate = bs_read( &bitstream, 24 );
1226 bs_read( &bitstream, 6 ); /* quality */
1228 i_keyframe_frequency_force = 1 << bs_read( &bitstream, 5 );
1230 /* granule_shift = i_log( frequency_force -1 ) */
1231 p_stream->i_theora_keyframe_granule_shift = 0;
1232 i_keyframe_frequency_force--;
1233 while( i_keyframe_frequency_force )
1235 p_stream->i_theora_keyframe_granule_shift++;
1236 i_keyframe_frequency_force >>= 1;
1239 p_stream->f_rate = ((float)i_fps_numerator) / i_fps_denominator;
1242 static void Ogg_ReadVorbisHeader( logical_stream_t *p_stream,
1243 ogg_packet *p_oggpacket )
1247 p_stream->fmt.i_cat = AUDIO_ES;
1248 p_stream->fmt.i_codec = VLC_FOURCC( 'v','o','r','b' );
1250 /* Signal that we want to keep a backup of the vorbis
1251 * stream headers. They will be used when switching between
1253 p_stream->b_force_backup = 1;
1255 /* Cheat and get additionnal info ;) */
1256 oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1257 oggpack_adv( &opb, 88 );
1258 p_stream->fmt.audio.i_channels = oggpack_read( &opb, 8 );
1259 p_stream->f_rate = p_stream->fmt.audio.i_rate =
1260 oggpack_read( &opb, 32 );
1261 oggpack_adv( &opb, 32 );
1262 p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
1265 static void Ogg_ReadSpeexHeader( logical_stream_t *p_stream,
1266 ogg_packet *p_oggpacket )
1270 p_stream->fmt.i_cat = AUDIO_ES;
1271 p_stream->fmt.i_codec = VLC_FOURCC( 's','p','x',' ' );
1273 /* Signal that we want to keep a backup of the speex
1274 * stream headers. They will be used when switching between
1276 p_stream->b_force_backup = 1;
1278 /* Cheat and get additionnal info ;) */
1279 oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1280 oggpack_adv( &opb, 224 );
1281 oggpack_adv( &opb, 32 ); /* speex_version_id */
1282 oggpack_adv( &opb, 32 ); /* header_size */
1283 p_stream->f_rate = p_stream->fmt.audio.i_rate = oggpack_read( &opb, 32 );
1284 oggpack_adv( &opb, 32 ); /* mode */
1285 oggpack_adv( &opb, 32 ); /* mode_bitstream_version */
1286 p_stream->fmt.audio.i_channels = oggpack_read( &opb, 32 );
1287 p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
1290 static void Ogg_ReadFlacHeader( demux_t *p_demux, logical_stream_t *p_stream,
1291 ogg_packet *p_oggpacket )
1293 /* Parse the STREAMINFO metadata */
1296 bs_init( &s, p_oggpacket->packet, p_oggpacket->bytes );
1299 if( bs_read( &s, 7 ) == 0 )
1301 if( bs_read( &s, 24 ) >= 34 /*size STREAMINFO*/ )
1304 p_stream->f_rate = p_stream->fmt.audio.i_rate = bs_read( &s, 20 );
1305 p_stream->fmt.audio.i_channels = bs_read( &s, 3 ) + 1;
1307 msg_Dbg( p_demux, "FLAC header, channels: %i, rate: %i",
1308 p_stream->fmt.audio.i_channels, (int)p_stream->f_rate );
1310 else msg_Dbg( p_demux, "FLAC STREAMINFO metadata too short" );
1312 /* Fake this as the last metadata block */
1313 *((uint8_t*)p_oggpacket->packet) |= 0x80;
1317 /* This ain't a STREAMINFO metadata */
1318 msg_Dbg( p_demux, "Invalid FLAC STREAMINFO metadata" );
1322 static void Ogg_ReadAnnodexHeader( vlc_object_t *p_this,
1323 logical_stream_t *p_stream,
1324 ogg_packet *p_oggpacket )
1326 if( p_oggpacket->bytes >= 28 &&
1327 !memcmp( &p_oggpacket->packet[0], "Annodex", 7 ) )
1331 uint16_t major_version;
1332 uint16_t minor_version;
1333 uint64_t timebase_numerator;
1334 uint64_t timebase_denominator;
1336 Ogg_ReadTheoraHeader( p_stream, p_oggpacket );
1338 oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1339 oggpack_adv( &opb, 8*8 ); /* "Annodex\0" header */
1340 major_version = oggpack_read( &opb, 2*8 ); /* major version */
1341 minor_version = oggpack_read( &opb, 2*8 ); /* minor version */
1342 timebase_numerator = GetQWLE( &p_oggpacket->packet[16] );
1343 timebase_denominator = GetQWLE( &p_oggpacket->packet[24] );
1345 else if( p_oggpacket->bytes >= 42 &&
1346 !memcmp( &p_oggpacket->packet[0], "AnxData", 7 ) )
1348 uint64_t granule_rate_numerator;
1349 uint64_t granule_rate_denominator;
1350 char content_type_string[1024];
1352 /* Read in Annodex header fields */
1354 granule_rate_numerator = GetQWLE( &p_oggpacket->packet[8] );
1355 granule_rate_denominator = GetQWLE( &p_oggpacket->packet[16] );
1356 p_stream->secondary_header_packets =
1357 GetDWLE( &p_oggpacket->packet[24] );
1359 /* we are guaranteed that the first header field will be
1360 * the content-type (by the Annodex standard) */
1361 content_type_string[0] = '\0';
1362 if( !strncasecmp( &p_oggpacket->packet[28], "Content-Type: ", 14 ) )
1364 uint8_t *p = memchr( &p_oggpacket->packet[42], '\r',
1365 p_oggpacket->bytes - 1 );
1366 if( p && p[0] == '\r' && p[1] == '\n' )
1367 sscanf( &p_oggpacket->packet[42], "%1024s\r\n",
1368 content_type_string );
1371 msg_Dbg( p_this, "AnxData packet info: "I64Fd" / "I64Fd", %d, ``%s''",
1372 granule_rate_numerator, granule_rate_denominator,
1373 p_stream->secondary_header_packets, content_type_string );
1375 p_stream->f_rate = (float) granule_rate_numerator /
1376 (float) granule_rate_denominator;
1378 /* What type of file do we have?
1379 * strcmp is safe to use here because we've extracted
1380 * content_type_string from the stream manually */
1381 if( !strncmp(content_type_string, "audio/x-wav", 11) )
1383 /* n.b. WAVs are unsupported right now */
1384 p_stream->fmt.i_cat = UNKNOWN_ES;
1386 else if( !strncmp(content_type_string, "audio/x-vorbis", 14) )
1388 p_stream->fmt.i_cat = AUDIO_ES;
1389 p_stream->fmt.i_codec = VLC_FOURCC( 'v','o','r','b' );
1391 p_stream->b_force_backup = 1;
1393 else if( !strncmp(content_type_string, "audio/x-speex", 14) )
1395 p_stream->fmt.i_cat = AUDIO_ES;
1396 p_stream->fmt.i_codec = VLC_FOURCC( 's','p','x',' ' );
1398 p_stream->b_force_backup = 1;
1400 else if( !strncmp(content_type_string, "video/x-theora", 14) )
1402 p_stream->fmt.i_cat = VIDEO_ES;
1403 p_stream->fmt.i_codec = VLC_FOURCC( 't','h','e','o' );
1405 p_stream->b_force_backup = 1;
1407 else if( !strncmp(content_type_string, "video/x-xvid", 14) )
1409 p_stream->fmt.i_cat = VIDEO_ES;
1410 p_stream->fmt.i_codec = VLC_FOURCC( 'x','v','i','d' );
1412 p_stream->b_force_backup = 1;
1414 else if( !strncmp(content_type_string, "video/mpeg", 14) )
1416 /* n.b. MPEG streams are unsupported right now */
1417 p_stream->fmt.i_cat = VIDEO_ES;
1418 p_stream->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1420 else if( !strncmp(content_type_string, "text/x-cmml", 11) )
1422 ogg_stream_packetout( &p_stream->os, p_oggpacket );
1423 p_stream->fmt.i_cat = SPU_ES;
1424 p_stream->fmt.i_codec = VLC_FOURCC( 'c','m','m','l' );