1 /*****************************************************************************
2 * ogg.c : ogg stream demux module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2003 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, 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 )
187 msg_Err( p_demux, "cannot peek" );
190 if( strcmp( p_demux->psz_demux, "ogg" ) && strncmp( p_peek, "OggS", 4 ) )
192 msg_Warn( p_demux, "ogg module discarded (invalid header)" );
196 /* Set exported functions */
197 p_demux->pf_demux = Demux;
198 p_demux->pf_control = Control;
199 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
201 memset( p_sys, 0, sizeof( demux_sys_t ) );
202 p_sys->i_bitrate = 0;
203 p_sys->pp_stream = NULL;
205 /* Begnning of stream, tell the demux to look for elementary streams. */
208 /* Initialize the Ogg physical bitstream parser */
209 ogg_sync_init( &p_sys->oy );
214 /*****************************************************************************
215 * Close: frees unused data
216 *****************************************************************************/
217 static void Close( vlc_object_t *p_this )
219 demux_t *p_demux = (demux_t *)p_this;
220 demux_sys_t *p_sys = p_demux->p_sys ;
222 /* Cleanup the bitstream parser */
223 ogg_sync_clear( &p_sys->oy );
225 Ogg_EndOfStream( p_demux );
230 /*****************************************************************************
231 * Demux: reads and demuxes data packets
232 *****************************************************************************
233 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
234 *****************************************************************************/
235 static int Demux( demux_t * p_demux )
237 demux_sys_t *p_sys = p_demux->p_sys;
239 ogg_packet oggpacket;
243 if( p_sys->i_eos == p_sys->i_streams )
247 msg_Dbg( p_demux, "end of a group of logical streams" );
248 Ogg_EndOfStream( p_demux );
252 if( Ogg_BeginningOfStream( p_demux ) != VLC_SUCCESS ) return 0;
254 msg_Dbg( p_demux, "beginning of a group of logical streams" );
255 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
259 * Demux an ogg page from the stream
261 if( Ogg_ReadPage( p_demux, &oggpage ) != VLC_SUCCESS )
266 /* Test for End of Stream */
267 if( ogg_page_eos( &oggpage ) ) p_sys->i_eos++;
270 for( i_stream = 0; i_stream < p_sys->i_streams; i_stream++ )
272 logical_stream_t *p_stream = p_sys->pp_stream[i_stream];
274 if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
277 while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
279 /* Read info from any secondary header packets, if there are any */
280 if( p_stream->secondary_header_packets > 0 )
282 if( p_stream->fmt.i_codec == VLC_FOURCC('t','h','e','o') &&
283 oggpacket.bytes >= 7 &&
284 ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
286 Ogg_ReadTheoraHeader( p_stream, &oggpacket );
287 p_stream->secondary_header_packets = 0;
289 else if( p_stream->fmt.i_codec == VLC_FOURCC('v','o','r','b') &&
290 oggpacket.bytes >= 7 &&
291 ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
293 Ogg_ReadVorbisHeader( p_stream, &oggpacket );
294 p_stream->secondary_header_packets = 0;
296 else if ( p_stream->fmt.i_codec == VLC_FOURCC('c','m','m','l') )
298 p_stream->secondary_header_packets = 0;
301 p_stream->secondary_header_packets--;
304 if( p_stream->b_reinit )
306 /* If synchro is re-initialized we need to drop all the packets
307 * until we find a new dated one. */
308 Ogg_UpdatePCR( p_stream, &oggpacket );
310 if( p_stream->i_pcr >= 0 )
312 p_stream->b_reinit = 0;
316 p_stream->i_interpolated_pcr = -1;
320 /* An Ogg/vorbis packet contains an end date granulepos */
321 if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) ||
322 p_stream->fmt.i_codec == VLC_FOURCC( 's','p','x',' ' ) ||
323 p_stream->fmt.i_codec == VLC_FOURCC( 'f','l','a','c' ) )
325 if( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
327 Ogg_DecodePacket( p_demux, p_stream, &oggpacket );
331 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
338 Ogg_DecodePacket( p_demux, p_stream, &oggpacket );
343 i_stream = 0; p_sys->i_pcr = -1;
344 for( ; i_stream < p_sys->i_streams; i_stream++ )
346 logical_stream_t *p_stream = p_sys->pp_stream[i_stream];
348 if( p_stream->fmt.i_cat == SPU_ES )
350 if( p_stream->i_interpolated_pcr < 0 )
353 if( p_sys->i_pcr < 0 || p_stream->i_interpolated_pcr < p_sys->i_pcr )
354 p_sys->i_pcr = p_stream->i_interpolated_pcr;
357 if( p_sys->i_pcr >= 0 )
359 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
366 /*****************************************************************************
368 *****************************************************************************/
369 static int Control( demux_t *p_demux, int i_query, va_list args )
371 demux_sys_t *p_sys = p_demux->p_sys;
378 pi64 = (int64_t*)va_arg( args, int64_t * );
379 *pi64 = p_sys->i_pcr;
385 case DEMUX_SET_POSITION:
386 for( i = 0; i < p_sys->i_streams; i++ )
388 logical_stream_t *p_stream = p_sys->pp_stream[i];
390 /* we'll trash all the data until we find the next pcr */
391 p_stream->b_reinit = 1;
392 p_stream->i_pcr = -1;
393 p_stream->i_interpolated_pcr = -1;
394 ogg_stream_reset( &p_stream->os );
396 ogg_sync_reset( &p_sys->oy );
399 return demux2_vaControlHelper( p_demux->s, 0, -1, p_sys->i_bitrate,
404 /****************************************************************************
405 * Ogg_ReadPage: Read a full Ogg page from the physical bitstream.
406 ****************************************************************************
407 * Returns VLC_SUCCESS if a page has been read. An error might happen if we
408 * are at the end of stream.
409 ****************************************************************************/
410 static int Ogg_ReadPage( demux_t *p_demux, ogg_page *p_oggpage )
412 demux_sys_t *p_ogg = p_demux->p_sys ;
416 while( ogg_sync_pageout( &p_ogg->oy, p_oggpage ) != 1 )
418 p_buffer = ogg_sync_buffer( &p_ogg->oy, OGG_BLOCK_SIZE );
420 i_read = stream_Read( p_demux->s, p_buffer, OGG_BLOCK_SIZE );
424 ogg_sync_wrote( &p_ogg->oy, i_read );
430 /****************************************************************************
431 * Ogg_UpdatePCR: update the PCR (90kHz program clock reference) for the
433 ****************************************************************************/
434 static void Ogg_UpdatePCR( logical_stream_t *p_stream,
435 ogg_packet *p_oggpacket )
437 /* Convert the granulepos into a pcr */
438 if( p_oggpacket->granulepos >= 0 )
440 if( p_stream->fmt.i_codec != VLC_FOURCC( 't','h','e','o' ) )
442 p_stream->i_pcr = p_oggpacket->granulepos * I64C(1000000)
447 ogg_int64_t iframe = p_oggpacket->granulepos >>
448 p_stream->i_theora_keyframe_granule_shift;
449 ogg_int64_t pframe = p_oggpacket->granulepos -
450 ( iframe << p_stream->i_theora_keyframe_granule_shift );
452 p_stream->i_pcr = ( iframe + pframe ) * I64C(1000000)
456 p_stream->i_interpolated_pcr = p_stream->i_pcr;
460 p_stream->i_pcr = -1;
462 /* no granulepos available, try to interpolate the pcr.
463 * If we can't then don't touch the old value. */
464 if( p_stream->fmt.i_cat == VIDEO_ES )
465 /* 1 frame per packet */
466 p_stream->i_interpolated_pcr += (I64C(1000000) / p_stream->f_rate);
467 else if( p_stream->fmt.i_bitrate )
468 p_stream->i_interpolated_pcr +=
469 ( p_oggpacket->bytes * I64C(1000000) /
470 p_stream->fmt.i_bitrate / 8 );
474 /****************************************************************************
475 * Ogg_DecodePacket: Decode an Ogg packet.
476 ****************************************************************************/
477 static void Ogg_DecodePacket( demux_t *p_demux,
478 logical_stream_t *p_stream,
479 ogg_packet *p_oggpacket )
482 vlc_bool_t b_selected;
483 int i_header_len = 0;
484 mtime_t i_pts = -1, i_interpolated_pts;
487 if( !p_oggpacket->bytes )
489 msg_Dbg( p_demux, "discarding 0 sized packet" );
493 if( p_oggpacket->bytes >= 7 &&
494 ! strncmp ( &p_oggpacket->packet[0], "Annodex", 7 ) )
496 /* it's an Annodex packet -- skip it (do nothing) */
499 else if( p_oggpacket->bytes >= 7 &&
500 ! strncmp ( &p_oggpacket->packet[0], "AnxData", 7 ) )
502 /* it's an AnxData packet -- skip it (do nothing) */
506 /* Check the ES is selected */
507 es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
508 p_stream->p_es, &b_selected );
510 if( p_stream->b_force_backup )
513 vlc_bool_t b_store_size = VLC_TRUE;
515 p_stream->i_packets_backup++;
516 switch( p_stream->fmt.i_codec )
518 case VLC_FOURCC( 'v','o','r','b' ):
519 case VLC_FOURCC( 's','p','x',' ' ):
520 case VLC_FOURCC( 't','h','e','o' ):
521 if( p_stream->i_packets_backup == 3 ) p_stream->b_force_backup = 0;
524 case VLC_FOURCC( 'f','l','a','c' ):
525 if( p_stream->i_packets_backup == 2 )
527 Ogg_ReadFlacHeader( p_demux, p_stream, p_oggpacket );
528 p_stream->b_force_backup = 0;
530 b_store_size = VLC_FALSE;
534 p_stream->b_force_backup = 0;
538 /* Backup the ogg packet (likely an header packet) */
539 p_stream->p_headers =
540 realloc( p_stream->p_headers, p_stream->i_headers +
541 p_oggpacket->bytes + (b_store_size ? 2 : 0) );
542 p_extra = p_stream->p_headers + p_stream->i_headers;
545 *(p_extra++) = p_oggpacket->bytes >> 8;
546 *(p_extra++) = p_oggpacket->bytes & 0xFF;
548 memcpy( p_extra, p_oggpacket->packet, p_oggpacket->bytes );
549 p_stream->i_headers += p_oggpacket->bytes + (b_store_size ? 2 : 0);
551 if( !p_stream->b_force_backup )
553 /* Last header received, commit changes */
554 p_stream->fmt.i_extra = p_stream->i_headers;
555 p_stream->fmt.p_extra =
556 realloc( p_stream->fmt.p_extra, p_stream->i_headers );
557 memcpy( p_stream->fmt.p_extra, p_stream->p_headers,
558 p_stream->i_headers );
559 es_out_Control( p_demux->out, ES_OUT_SET_FMT,
560 p_stream->p_es, &p_stream->fmt );
563 b_selected = VLC_FALSE; /* Discard the header packet */
566 /* Convert the pcr into a pts */
567 if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) ||
568 p_stream->fmt.i_codec == VLC_FOURCC( 's','p','x',' ' ) ||
569 p_stream->fmt.i_codec == VLC_FOURCC( 'f','l','a','c' ) )
571 if( p_stream->i_pcr >= 0 )
573 /* This is for streams where the granulepos of the header packets
574 * doesn't match these of the data packets (eg. ogg web radios). */
575 if( p_stream->i_previous_pcr == 0 &&
576 p_stream->i_pcr > 3 * DEFAULT_PTS_DELAY )
578 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
580 /* Call the pace control */
581 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
585 p_stream->i_previous_pcr = p_stream->i_pcr;
587 /* The granulepos is the end date of the sample */
588 i_pts = p_stream->i_pcr;
592 /* Convert the granulepos into the next pcr */
593 i_interpolated_pts = p_stream->i_interpolated_pcr;
594 Ogg_UpdatePCR( p_stream, p_oggpacket );
596 if( p_stream->i_pcr >= 0 )
598 /* This is for streams where the granulepos of the header packets
599 * doesn't match these of the data packets (eg. ogg web radios). */
600 if( p_stream->i_previous_pcr == 0 &&
601 p_stream->i_pcr > 3 * DEFAULT_PTS_DELAY )
603 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
605 /* Call the pace control */
606 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_stream->i_pcr );
610 if( p_stream->fmt.i_codec != VLC_FOURCC( 'v','o','r','b' ) &&
611 p_stream->fmt.i_codec != VLC_FOURCC( 's','p','x',' ' ) &&
612 p_stream->fmt.i_codec != VLC_FOURCC( 'f','l','a','c' ) &&
613 p_stream->i_pcr >= 0 )
615 p_stream->i_previous_pcr = p_stream->i_pcr;
617 /* The granulepos is the start date of the sample */
618 i_pts = p_stream->i_pcr;
623 /* This stream isn't currently selected so we don't need to decode it,
624 * but we did need to store its pcr as it might be selected later on */
628 if( !( p_block = block_New( p_demux, p_oggpacket->bytes ) ) ) return;
631 if( i_pts == 0 ) i_pts = 1;
632 else if( i_pts == -1 && i_interpolated_pts == 0 ) i_pts = 1;
633 else if( i_pts == -1 ) i_pts = 0;
635 if( p_stream->fmt.i_cat == AUDIO_ES )
636 p_block->i_dts = p_block->i_pts = i_pts;
637 else if( p_stream->fmt.i_cat == SPU_ES )
639 p_block->i_dts = p_block->i_pts = i_pts;
640 p_block->i_length = 0;
642 else if( p_stream->fmt.i_codec == VLC_FOURCC( 't','h','e','o' ) )
643 p_block->i_dts = p_block->i_pts = i_pts;
646 p_block->i_dts = i_pts;
650 if( p_stream->fmt.i_codec != VLC_FOURCC( 'v','o','r','b' ) &&
651 p_stream->fmt.i_codec != VLC_FOURCC( 's','p','x',' ' ) &&
652 p_stream->fmt.i_codec != VLC_FOURCC( 'f','l','a','c' ) &&
653 p_stream->fmt.i_codec != VLC_FOURCC( 't','a','r','k' ) &&
654 p_stream->fmt.i_codec != VLC_FOURCC( 't','h','e','o' ) &&
655 p_stream->fmt.i_codec != VLC_FOURCC( 'c','m','m','l' ) )
657 /* We remove the header from the packet */
658 i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
659 i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
661 if( p_stream->fmt.i_codec == VLC_FOURCC( 's','u','b','t' ))
663 /* But with subtitles we need to retrieve the duration first */
666 if( i_header_len > 0 && p_oggpacket->bytes >= i_header_len + 1 )
668 for( i = 0, lenbytes = 0; i < i_header_len; i++ )
670 lenbytes = lenbytes << 8;
671 lenbytes += *(p_oggpacket->packet + i_header_len - i);
674 if( p_oggpacket->bytes - 1 - i_header_len > 2 ||
675 ( p_oggpacket->packet[i_header_len + 1] != ' ' &&
676 p_oggpacket->packet[i_header_len + 1] != 0 &&
677 p_oggpacket->packet[i_header_len + 1] != '\n' &&
678 p_oggpacket->packet[i_header_len + 1] != '\r' ) )
680 p_block->i_length = (mtime_t)lenbytes * 1000;
685 p_block->i_buffer -= i_header_len;
688 if( p_stream->fmt.i_codec == VLC_FOURCC( 't','a','r','k' ) )
690 /* FIXME: the biggest hack I've ever done */
691 msg_Warn( p_demux, "tarkin pts: "I64Fd", granule: "I64Fd,
692 p_block->i_pts, p_block->i_dts );
696 memcpy( p_block->p_buffer, p_oggpacket->packet + i_header_len,
697 p_oggpacket->bytes - i_header_len );
699 es_out_Send( p_demux->out, p_stream->p_es, p_block );
702 /****************************************************************************
703 * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
704 * stream and fill p_ogg.
705 *****************************************************************************
706 * The initial page of a logical stream is marked as a 'bos' page.
707 * Furthermore, the Ogg specification mandates that grouped bitstreams begin
708 * together and all of the initial pages must appear before any data pages.
710 * On success this function returns VLC_SUCCESS.
711 ****************************************************************************/
712 static int Ogg_FindLogicalStreams( demux_t *p_demux )
714 demux_sys_t *p_ogg = p_demux->p_sys ;
715 ogg_packet oggpacket;
719 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
721 while( Ogg_ReadPage( p_demux, &oggpage ) == VLC_SUCCESS )
723 if( ogg_page_bos( &oggpage ) )
726 /* All is wonderful in our fine fine little world.
727 * We found the beginning of our first logical stream. */
728 while( ogg_page_bos( &oggpage ) )
732 realloc( p_ogg->pp_stream, p_ogg->i_streams *
733 sizeof(logical_stream_t *) );
735 p_stream = malloc( sizeof(logical_stream_t) );
736 memset( p_stream, 0, sizeof(logical_stream_t) );
737 p_stream->p_headers = 0;
739 es_format_Init( &p_stream->fmt, 0, 0 );
741 /* Setup the logical stream */
742 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
743 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
745 /* Extract the initial header from the first page and verify
746 * the codec type of tis Ogg bitstream */
747 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
749 /* error. stream version mismatch perhaps */
750 msg_Err( p_demux, "error reading first page of "
751 "Ogg bitstream data" );
755 /* FIXME: check return value */
756 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
758 /* Check for Vorbis header */
759 if( oggpacket.bytes >= 7 &&
760 ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
762 Ogg_ReadVorbisHeader( p_stream, &oggpacket );
763 msg_Dbg( p_demux, "found vorbis header" );
765 /* Check for Speex header */
766 else if( oggpacket.bytes >= 7 &&
767 ! strncmp( &oggpacket.packet[0], "Speex", 5 ) )
769 Ogg_ReadSpeexHeader( p_stream, &oggpacket );
770 msg_Dbg( p_demux, "found speex header, channels: %i, "
771 "rate: %i, bitrate: %i",
772 p_stream->fmt.audio.i_channels,
773 (int)p_stream->f_rate, p_stream->fmt.i_bitrate );
775 /* Check for Flac header */
776 else if( oggpacket.bytes >= 4 &&
777 ! strncmp( &oggpacket.packet[0], "fLaC", 4 ) )
779 msg_Dbg( p_demux, "found FLAC header" );
781 /* Grrrr!!!! Did they really have to put all the
782 * important info in the second header packet!!!
783 * (STREAMINFO metadata is in the following packet) */
784 p_stream->b_force_backup = 1;
786 p_stream->fmt.i_cat = AUDIO_ES;
787 p_stream->fmt.i_codec = VLC_FOURCC( 'f','l','a','c' );
789 /* Check for Theora header */
790 else if( oggpacket.bytes >= 7 &&
791 ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
793 Ogg_ReadTheoraHeader( p_stream, &oggpacket );
796 "found theora header, bitrate: %i, rate: %f",
797 p_stream->fmt.i_bitrate, p_stream->f_rate );
799 /* Check for Tarkin header */
800 else if( oggpacket.bytes >= 7 &&
801 ! strncmp( &oggpacket.packet[1], "tarkin", 6 ) )
805 msg_Dbg( p_demux, "found tarkin header" );
806 p_stream->fmt.i_cat = VIDEO_ES;
807 p_stream->fmt.i_codec = VLC_FOURCC( 't','a','r','k' );
809 /* Cheat and get additionnal info ;) */
810 oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
811 oggpack_adv( &opb, 88 );
812 oggpack_adv( &opb, 104 );
813 p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
814 p_stream->f_rate = 2; /* FIXME */
816 "found tarkin header, bitrate: %i, rate: %f",
817 p_stream->fmt.i_bitrate, p_stream->f_rate );
819 /* Check for Annodex header */
820 else if( oggpacket.bytes >= 7 &&
821 ! strncmp( &oggpacket.packet[0], "Annodex", 7 ) )
823 Ogg_ReadAnnodexHeader( VLC_OBJECT(p_demux), p_stream,
825 /* kill annodex track */
829 /* Check for Annodex header */
830 else if( oggpacket.bytes >= 7 &&
831 ! strncmp( &oggpacket.packet[0], "AnxData", 7 ) )
833 Ogg_ReadAnnodexHeader( VLC_OBJECT(p_demux), p_stream,
836 else if( oggpacket.bytes >= 142 &&
837 !strncmp( &oggpacket.packet[1],
838 "Direct Show Samples embedded in Ogg", 35 ))
840 /* Old header type */
842 /* Check for video header (old format) */
843 if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
844 oggpacket.bytes >= 184 )
846 p_stream->fmt.i_cat = VIDEO_ES;
847 p_stream->fmt.i_codec =
848 VLC_FOURCC( oggpacket.packet[68],
849 oggpacket.packet[69],
850 oggpacket.packet[70],
851 oggpacket.packet[71] );
852 msg_Dbg( p_demux, "found video header of type: %.4s",
853 (char *)&p_stream->fmt.i_codec );
855 p_stream->f_rate = 10000000.0 /
856 GetQWLE((oggpacket.packet+164));
857 p_stream->fmt.video.i_bits_per_pixel =
858 GetWLE((oggpacket.packet+182));
859 if( !p_stream->fmt.video.i_bits_per_pixel )
861 p_stream->fmt.video.i_bits_per_pixel = 24;
862 p_stream->fmt.video.i_width =
863 GetDWLE((oggpacket.packet+176));
864 p_stream->fmt.video.i_height =
865 GetDWLE((oggpacket.packet+180));
868 "fps: %f, width:%i; height:%i, bitcount:%i",
870 p_stream->fmt.video.i_width,
871 p_stream->fmt.video.i_height,
872 p_stream->fmt.video.i_bits_per_pixel);
875 /* Check for audio header (old format) */
876 else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
878 unsigned int i_extra_size;
879 unsigned int i_format_tag;
881 p_stream->fmt.i_cat = AUDIO_ES;
883 i_extra_size = GetWLE((oggpacket.packet+140));
886 p_stream->fmt.i_extra = i_extra_size;
887 p_stream->fmt.p_extra = malloc( i_extra_size );
888 memcpy( p_stream->fmt.p_extra,
889 oggpacket.packet + 142, i_extra_size );
892 i_format_tag = GetWLE((oggpacket.packet+124));
893 p_stream->fmt.audio.i_channels =
894 GetWLE((oggpacket.packet+126));
895 p_stream->f_rate = p_stream->fmt.audio.i_rate =
896 GetDWLE((oggpacket.packet+128));
897 p_stream->fmt.i_bitrate =
898 GetDWLE((oggpacket.packet+132)) * 8;
899 p_stream->fmt.audio.i_blockalign =
900 GetWLE((oggpacket.packet+136));
901 p_stream->fmt.audio.i_bitspersample =
902 GetWLE((oggpacket.packet+138));
904 wf_tag_to_fourcc( i_format_tag,
905 &p_stream->fmt.i_codec, 0 );
907 if( p_stream->fmt.i_codec ==
908 VLC_FOURCC('u','n','d','f') )
910 p_stream->fmt.i_codec = VLC_FOURCC( 'm', 's',
911 ( i_format_tag >> 8 ) & 0xff,
912 i_format_tag & 0xff );
915 msg_Dbg( p_demux, "found audio header of type: %.4s",
916 (char *)&p_stream->fmt.i_codec );
917 msg_Dbg( p_demux, "audio:0x%4.4x channels:%d %dHz "
918 "%dbits/sample %dkb/s",
920 p_stream->fmt.audio.i_channels,
921 p_stream->fmt.audio.i_rate,
922 p_stream->fmt.audio.i_bitspersample,
923 p_stream->fmt.i_bitrate / 1024 );
928 msg_Dbg( p_demux, "stream %d has an old header "
929 "but is of an unknown type", p_ogg->i_streams-1 );
934 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
935 == PACKET_TYPE_HEADER &&
936 oggpacket.bytes >= (int)sizeof(stream_header)+1 )
938 stream_header *st = (stream_header *)(oggpacket.packet+1);
940 /* Check for video header (new format) */
941 if( !strncmp( st->streamtype, "video", 5 ) )
943 p_stream->fmt.i_cat = VIDEO_ES;
945 /* We need to get rid of the header packet */
946 ogg_stream_packetout( &p_stream->os, &oggpacket );
948 p_stream->fmt.i_codec =
949 VLC_FOURCC( st->subtype[0], st->subtype[1],
950 st->subtype[2], st->subtype[3] );
951 msg_Dbg( p_demux, "found video header of type: %.4s",
952 (char *)&p_stream->fmt.i_codec );
954 p_stream->f_rate = 10000000.0 /
955 GetQWLE(&st->time_unit);
956 p_stream->fmt.video.i_bits_per_pixel =
957 GetWLE(&st->bits_per_sample);
958 p_stream->fmt.video.i_width =
959 GetDWLE(&st->sh.video.width);
960 p_stream->fmt.video.i_height =
961 GetDWLE(&st->sh.video.height);
964 "fps: %f, width:%i; height:%i, bitcount:%i",
966 p_stream->fmt.video.i_width,
967 p_stream->fmt.video.i_height,
968 p_stream->fmt.video.i_bits_per_pixel );
970 /* Check for audio header (new format) */
971 else if( !strncmp( st->streamtype, "audio", 5 ) )
976 p_stream->fmt.i_cat = AUDIO_ES;
978 /* We need to get rid of the header packet */
979 ogg_stream_packetout( &p_stream->os, &oggpacket );
981 p_stream->fmt.i_extra = GetQWLE(&st->size) -
982 sizeof(stream_header);
983 if( p_stream->fmt.i_extra )
985 p_stream->fmt.p_extra =
986 malloc( p_stream->fmt.i_extra );
987 memcpy( p_stream->fmt.p_extra, st + 1,
988 p_stream->fmt.i_extra );
991 memcpy( p_buffer, st->subtype, 4 );
993 i_format_tag = strtol(p_buffer,NULL,16);
994 p_stream->fmt.audio.i_channels =
995 GetWLE(&st->sh.audio.channels);
996 p_stream->f_rate = p_stream->fmt.audio.i_rate =
997 GetQWLE(&st->samples_per_unit);
998 p_stream->fmt.i_bitrate =
999 GetDWLE(&st->sh.audio.avgbytespersec) * 8;
1000 p_stream->fmt.audio.i_blockalign =
1001 GetWLE(&st->sh.audio.blockalign);
1002 p_stream->fmt.audio.i_bitspersample =
1003 GetWLE(&st->bits_per_sample);
1005 wf_tag_to_fourcc( i_format_tag,
1006 &p_stream->fmt.i_codec, 0 );
1008 if( p_stream->fmt.i_codec ==
1009 VLC_FOURCC('u','n','d','f') )
1011 p_stream->fmt.i_codec = VLC_FOURCC( 'm', 's',
1012 ( i_format_tag >> 8 ) & 0xff,
1013 i_format_tag & 0xff );
1016 msg_Dbg( p_demux, "found audio header of type: %.4s",
1017 (char *)&p_stream->fmt.i_codec );
1018 msg_Dbg( p_demux, "audio:0x%4.4x channels:%d %dHz "
1019 "%dbits/sample %dkb/s",
1021 p_stream->fmt.audio.i_channels,
1022 p_stream->fmt.audio.i_rate,
1023 p_stream->fmt.audio.i_bitspersample,
1024 p_stream->fmt.i_bitrate / 1024 );
1026 /* Check for text (subtitles) header */
1027 else if( !strncmp(st->streamtype, "text", 4) )
1029 /* We need to get rid of the header packet */
1030 ogg_stream_packetout( &p_stream->os, &oggpacket );
1032 msg_Dbg( p_demux, "found text subtitles header" );
1033 p_stream->fmt.i_cat = SPU_ES;
1034 p_stream->fmt.i_codec = VLC_FOURCC('s','u','b','t');
1035 p_stream->f_rate = 1000; /* granulepos is in milisec */
1039 msg_Dbg( p_demux, "stream %d has a header marker "
1040 "but is of an unknown type", p_ogg->i_streams-1 );
1047 msg_Dbg( p_demux, "stream %d is of unknown type",
1048 p_ogg->i_streams-1 );
1053 if( Ogg_ReadPage( p_demux, &oggpage ) != VLC_SUCCESS )
1054 return VLC_EGENERIC;
1057 /* This is the first data page, which means we are now finished
1058 * with the initial pages. We just need to store it in the relevant
1060 for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1062 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1074 return VLC_EGENERIC;
1077 /****************************************************************************
1078 * Ogg_BeginningOfStream: Look for Beginning of Stream ogg pages and add
1079 * Elementary streams.
1080 ****************************************************************************/
1081 static int Ogg_BeginningOfStream( demux_t *p_demux )
1083 demux_sys_t *p_ogg = p_demux->p_sys ;
1086 /* Find the logical streams embedded in the physical stream and
1087 * initialize our p_ogg structure. */
1088 if( Ogg_FindLogicalStreams( p_demux ) != VLC_SUCCESS )
1090 msg_Warn( p_demux, "couldn't find any ogg logical stream" );
1091 return VLC_EGENERIC;
1094 p_ogg->i_bitrate = 0;
1096 for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1098 #define p_stream p_ogg->pp_stream[i_stream]
1099 p_stream->p_es = es_out_Add( p_demux->out, &p_stream->fmt );
1101 if( p_stream->fmt.i_codec == VLC_FOURCC('c','m','m','l') )
1103 /* Set the CMML stream active */
1104 es_out_Control( p_demux->out, ES_OUT_SET_ES, p_stream->p_es );
1107 p_ogg->i_bitrate += p_stream->fmt.i_bitrate;
1109 p_stream->i_pcr = p_stream->i_previous_pcr =
1110 p_stream->i_interpolated_pcr = -1;
1111 p_stream->b_reinit = 0;
1118 /****************************************************************************
1119 * Ogg_EndOfStream: clean up the ES when an End of Stream is detected.
1120 ****************************************************************************/
1121 static void Ogg_EndOfStream( demux_t *p_demux )
1123 demux_sys_t *p_ogg = p_demux->p_sys ;
1126 #define p_stream p_ogg->pp_stream[i_stream]
1127 for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1129 if( p_stream->p_es )
1130 es_out_Del( p_demux->out, p_stream->p_es );
1132 p_ogg->i_bitrate -= p_stream->fmt.i_bitrate;
1134 ogg_stream_clear( &p_ogg->pp_stream[i_stream]->os );
1135 if( p_ogg->pp_stream[i_stream]->p_headers)
1136 free( p_ogg->pp_stream[i_stream]->p_headers );
1138 es_format_Clean( &p_stream->fmt );
1140 free( p_ogg->pp_stream[i_stream] );
1145 if( p_ogg->pp_stream ) free( p_ogg->pp_stream );
1146 p_ogg->pp_stream = NULL;
1147 p_ogg->i_streams = 0;
1150 static void Ogg_ReadTheoraHeader( logical_stream_t *p_stream,
1151 ogg_packet *p_oggpacket )
1154 int i_fps_numerator;
1155 int i_fps_denominator;
1156 int i_keyframe_frequency_force;
1158 p_stream->fmt.i_cat = VIDEO_ES;
1159 p_stream->fmt.i_codec = VLC_FOURCC( 't','h','e','o' );
1161 /* Signal that we want to keep a backup of the theora
1162 * stream headers. They will be used when switching between
1164 p_stream->b_force_backup = 1;
1166 /* Cheat and get additionnal info ;) */
1167 bs_init( &bitstream, p_oggpacket->packet, p_oggpacket->bytes );
1168 bs_skip( &bitstream, 56 );
1169 bs_read( &bitstream, 8 ); /* major version num */
1170 bs_read( &bitstream, 8 ); /* minor version num */
1171 bs_read( &bitstream, 8 ); /* subminor version num */
1172 bs_read( &bitstream, 16 ) /*<< 4*/; /* width */
1173 bs_read( &bitstream, 16 ) /*<< 4*/; /* height */
1174 bs_read( &bitstream, 24 ); /* frame width */
1175 bs_read( &bitstream, 24 ); /* frame height */
1176 bs_read( &bitstream, 8 ); /* x offset */
1177 bs_read( &bitstream, 8 ); /* y offset */
1179 i_fps_numerator = bs_read( &bitstream, 32 );
1180 i_fps_denominator = bs_read( &bitstream, 32 );
1181 bs_read( &bitstream, 24 ); /* aspect_numerator */
1182 bs_read( &bitstream, 24 ); /* aspect_denominator */
1184 bs_read( &bitstream, 8 ); /* colorspace */
1185 p_stream->fmt.i_bitrate = bs_read( &bitstream, 24 );
1186 bs_read( &bitstream, 6 ); /* quality */
1188 i_keyframe_frequency_force = 1 << bs_read( &bitstream, 5 );
1190 /* granule_shift = i_log( frequency_force -1 ) */
1191 p_stream->i_theora_keyframe_granule_shift = 0;
1192 i_keyframe_frequency_force--;
1193 while( i_keyframe_frequency_force )
1195 p_stream->i_theora_keyframe_granule_shift++;
1196 i_keyframe_frequency_force >>= 1;
1199 p_stream->f_rate = ((float)i_fps_numerator) / i_fps_denominator;
1202 static void Ogg_ReadVorbisHeader( logical_stream_t *p_stream,
1203 ogg_packet *p_oggpacket )
1207 p_stream->fmt.i_cat = AUDIO_ES;
1208 p_stream->fmt.i_codec = VLC_FOURCC( 'v','o','r','b' );
1210 /* Signal that we want to keep a backup of the vorbis
1211 * stream headers. They will be used when switching between
1213 p_stream->b_force_backup = 1;
1215 /* Cheat and get additionnal info ;) */
1216 oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1217 oggpack_adv( &opb, 88 );
1218 p_stream->fmt.audio.i_channels = oggpack_read( &opb, 8 );
1219 p_stream->f_rate = p_stream->fmt.audio.i_rate =
1220 oggpack_read( &opb, 32 );
1221 oggpack_adv( &opb, 32 );
1222 p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
1225 static void Ogg_ReadSpeexHeader( logical_stream_t *p_stream,
1226 ogg_packet *p_oggpacket )
1230 p_stream->fmt.i_cat = AUDIO_ES;
1231 p_stream->fmt.i_codec = VLC_FOURCC( 's','p','x',' ' );
1233 /* Signal that we want to keep a backup of the speex
1234 * stream headers. They will be used when switching between
1236 p_stream->b_force_backup = 1;
1238 /* Cheat and get additionnal info ;) */
1239 oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1240 oggpack_adv( &opb, 224 );
1241 oggpack_adv( &opb, 32 ); /* speex_version_id */
1242 oggpack_adv( &opb, 32 ); /* header_size */
1243 p_stream->f_rate = p_stream->fmt.audio.i_rate = oggpack_read( &opb, 32 );
1244 oggpack_adv( &opb, 32 ); /* mode */
1245 oggpack_adv( &opb, 32 ); /* mode_bitstream_version */
1246 p_stream->fmt.audio.i_channels = oggpack_read( &opb, 32 );
1247 p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
1250 static void Ogg_ReadFlacHeader( demux_t *p_demux, logical_stream_t *p_stream,
1251 ogg_packet *p_oggpacket )
1253 /* Parse the STREAMINFO metadata */
1256 bs_init( &s, p_oggpacket->packet, p_oggpacket->bytes );
1258 if( bs_read( &s, 7 ) == 0 )
1260 if( bs_read( &s, 24 ) >= 34 /*size STREAMINFO*/ )
1263 p_stream->f_rate = p_stream->fmt.audio.i_rate = bs_read( &s, 20 );
1264 p_stream->fmt.audio.i_channels = bs_read( &s, 3 ) + 1;
1266 msg_Dbg( p_demux, "FLAC header, channels: %i, rate: %i",
1267 p_stream->fmt.audio.i_channels, (int)p_stream->f_rate );
1269 else msg_Dbg( p_demux, "FLAC STREAMINFO metadata too short" );
1271 /* Fake this as the last metadata block */
1272 *((uint8_t*)p_oggpacket->packet) |= 0x80;
1276 /* This ain't a STREAMINFO metadata */
1277 msg_Dbg( p_demux, "Invalid FLAC STREAMINFO metadata" );
1281 static void Ogg_ReadAnnodexHeader( vlc_object_t *p_this,
1282 logical_stream_t *p_stream,
1283 ogg_packet *p_oggpacket )
1285 if( ! strncmp( &p_oggpacket->packet[0], "Annodex", 7 ) )
1289 uint16_t major_version;
1290 uint16_t minor_version;
1291 uint64_t timebase_numerator;
1292 uint64_t timebase_denominator;
1294 Ogg_ReadTheoraHeader( p_stream, p_oggpacket );
1296 oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1297 oggpack_adv( &opb, 8*8 ); /* "Annodex\0" header */
1298 major_version = oggpack_read( &opb, 2*8 ); /* major version */
1299 minor_version = oggpack_read( &opb, 2*8 ); /* minor version */
1300 timebase_numerator = GetQWLE( &p_oggpacket->packet[16] );
1301 timebase_denominator = GetQWLE( &p_oggpacket->packet[24] );
1303 else if( ! strncmp( &p_oggpacket->packet[0], "AnxData", 7 ) )
1305 uint64_t granule_rate_numerator;
1306 uint64_t granule_rate_denominator;
1307 char content_type_string[1024];
1309 /* Read in Annodex header fields */
1311 granule_rate_numerator = GetQWLE( &p_oggpacket->packet[8] );
1312 granule_rate_denominator = GetQWLE( &p_oggpacket->packet[16] );
1313 p_stream->secondary_header_packets =
1314 GetDWLE( &p_oggpacket->packet[24] );
1316 msg_Dbg( p_this, "anxdata packet info: %qd/%qd, %d",
1317 granule_rate_numerator, granule_rate_denominator,
1318 p_stream->secondary_header_packets);
1320 /* we are guaranteed that the first header field will be
1321 * the content-type (by the Annodex standard) */
1322 sscanf( &p_oggpacket->packet[28], "Content-Type: %1024s\r\n",
1323 content_type_string );
1325 p_stream->f_rate = (float) granule_rate_numerator /
1326 (float) granule_rate_denominator;
1328 /* What type of file do we have?
1329 * strcmp is safe to use here because we've extracted
1330 * content_type_string from the stream manually */
1331 if( !strncmp(content_type_string, "audio/x-wav", 11) )
1333 /* n.b. WAVs are unsupported right now */
1334 p_stream->fmt.i_cat = UNKNOWN_ES;
1336 else if( !strncmp(content_type_string, "audio/x-vorbis", 14) )
1338 p_stream->fmt.i_cat = AUDIO_ES;
1339 p_stream->fmt.i_codec = VLC_FOURCC( 'v','o','r','b' );
1341 p_stream->b_force_backup = 1;
1343 else if( !strncmp(content_type_string, "audio/x-speex", 14) )
1345 p_stream->fmt.i_cat = AUDIO_ES;
1346 p_stream->fmt.i_codec = VLC_FOURCC( 's','p','x',' ' );
1348 p_stream->b_force_backup = 1;
1350 else if( !strncmp(content_type_string, "video/x-theora", 14) )
1352 p_stream->fmt.i_cat = VIDEO_ES;
1353 p_stream->fmt.i_codec = VLC_FOURCC( 't','h','e','o' );
1355 p_stream->b_force_backup = 1;
1357 else if( !strncmp(content_type_string, "video/x-xvid", 14) )
1359 p_stream->fmt.i_cat = VIDEO_ES;
1360 p_stream->fmt.i_codec = VLC_FOURCC( 'x','v','i','d' );
1362 p_stream->b_force_backup = 1;
1364 else if( !strncmp(content_type_string, "video/mpeg", 14) )
1366 /* n.b. MPEG streams are unsupported right now */
1367 p_stream->fmt.i_cat = VIDEO_ES;
1368 p_stream->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1370 else if( !strncmp(content_type_string, "text/x-cmml", 11) )
1372 ogg_stream_packetout( &p_stream->os, p_oggpacket );
1373 p_stream->fmt.i_cat = SPU_ES;
1374 p_stream->fmt.i_codec = VLC_FOURCC( 'c','m','m','l' );