1 /*****************************************************************************
2 * demux.c: demuxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2004-2007 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
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 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_demux.h>
35 #include <vlc_stream.h>
37 #include <vlc_input.h>
38 #include <vlc_charset.h>
41 #if defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
42 # include <libavformat/avformat.h>
43 #elif defined(HAVE_FFMPEG_AVFORMAT_H)
44 # include <ffmpeg/avformat.h>
47 #include "../../codec/avcodec/fourcc.h"
48 #include "../../codec/avcodec/chroma.h"
51 //#define AVFORMAT_DEBUG 1
53 /* Version checking */
54 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
56 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(50<<8)+0) )
57 # define HAVE_FFMPEG_CODEC_ATTACHMENT 1
60 #if (LIBAVFORMAT_VERSION_INT >= ((52<<16)+(15<<8)+0) )
61 # define HAVE_FFMPEG_CHAPTERS 1
64 /*****************************************************************************
65 * demux_sys_t: demux descriptor
66 *****************************************************************************/
86 input_attachment_t **attachments;
88 /* Only one title with seekpoints possible atm. */
89 input_title_t *p_title;
92 /*****************************************************************************
94 *****************************************************************************/
95 static int Demux ( demux_t *p_demux );
96 static int Control( demux_t *p_demux, int i_query, va_list args );
98 static int IORead( void *opaque, uint8_t *buf, int buf_size );
99 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
101 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time );
103 /*****************************************************************************
105 *****************************************************************************/
106 int OpenDemux( vlc_object_t *p_this )
108 demux_t *p_demux = (demux_t*)p_this;
114 int64_t i_start_time = -1;
116 /* Init Probe data */
117 pd.filename = p_demux->psz_path;
118 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
120 msg_Warn( p_demux, "cannot peek" );
124 av_register_all(); /* Can be called several times */
127 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
129 msg_Dbg( p_demux, "couldn't guess format" );
133 /* Don't try to handle MPEG unless forced */
134 if( !p_demux->b_force &&
135 ( !strcmp( fmt->name, "mpeg" ) ||
136 !strcmp( fmt->name, "vcd" ) ||
137 !strcmp( fmt->name, "vob" ) ||
138 !strcmp( fmt->name, "mpegts" ) ||
139 /* libavformat's redirector won't work */
140 !strcmp( fmt->name, "redir" ) ||
141 !strcmp( fmt->name, "sdp" ) ) )
146 /* Don't trigger false alarms on bin files */
147 if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
151 if( !p_demux->psz_path ) return VLC_EGENERIC;
153 i_len = strlen( p_demux->psz_path );
154 if( i_len < 4 ) return VLC_EGENERIC;
156 if( strcasecmp( &p_demux->psz_path[i_len - 4], ".str" ) &&
157 strcasecmp( &p_demux->psz_path[i_len - 4], ".xai" ) &&
158 strcasecmp( &p_demux->psz_path[i_len - 3], ".xa" ) )
164 msg_Dbg( p_demux, "detected format: %s", fmt->name );
166 /* Fill p_demux fields */
167 p_demux->pf_demux = Demux;
168 p_demux->pf_control = Control;
169 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
174 p_sys->i_pcr_tk = -1;
176 TAB_INIT( p_sys->i_attachments, p_sys->attachments);
177 p_sys->p_title = NULL;
179 /* Create I/O wrapper */
180 p_sys->io_buffer_size = 32768; /* FIXME */
181 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
182 p_sys->url.priv_data = p_demux;
183 p_sys->url.prot = &p_sys->prot;
184 p_sys->url.prot->name = "VLC I/O wrapper";
185 p_sys->url.prot->url_open = 0;
186 p_sys->url.prot->url_read =
187 (int (*) (URLContext *, unsigned char *, int))IORead;
188 p_sys->url.prot->url_write = 0;
189 p_sys->url.prot->url_seek =
190 (int64_t (*) (URLContext *, int64_t, int))IOSeek;
191 p_sys->url.prot->url_close = 0;
192 p_sys->url.prot->next = 0;
193 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
194 0, &p_sys->url, IORead, NULL, IOSeek );
196 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
197 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
200 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
203 msg_Err( p_demux, "av_open_input_stream failed" );
204 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
205 CloseDemux( p_this );
209 if( av_find_stream_info( p_sys->ic ) < 0 )
211 msg_Err( p_demux, "av_find_stream_info failed" );
212 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
213 CloseDemux( p_this );
216 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
218 for( i = 0; i < p_sys->ic->nb_streams; i++ )
220 AVCodecContext *cc = p_sys->ic->streams[i]->codec;
224 const char *psz_type = "unknown";
226 if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
227 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
229 switch( cc->codec_type )
231 case CODEC_TYPE_AUDIO:
232 es_format_Init( &fmt, AUDIO_ES, fcc );
233 fmt.audio.i_channels = cc->channels;
234 fmt.audio.i_rate = cc->sample_rate;
235 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
236 fmt.audio.i_bitspersample = cc->bits_per_sample;
238 fmt.audio.i_bitspersample = cc->bits_per_coded_sample;
240 fmt.audio.i_blockalign = cc->block_align;
244 case CODEC_TYPE_VIDEO:
245 es_format_Init( &fmt, VIDEO_ES, fcc );
247 /* Special case for raw video data */
248 if( cc->codec_id == CODEC_ID_RAWVIDEO )
250 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
251 if( GetVlcChroma( &fmt.video, cc->pix_fmt ) != VLC_SUCCESS)
253 msg_Err( p_demux, "was unable to find a FourCC match for raw video" );
256 fmt.i_codec = fmt.video.i_chroma;
259 fmt.video.i_width = cc->width;
260 fmt.video.i_height = cc->height;
263 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
264 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
269 case CODEC_TYPE_SUBTITLE:
270 es_format_Init( &fmt, SPU_ES, fcc );
271 psz_type = "subtitle";
275 es_format_Init( &fmt, UNKNOWN_ES, 0 );
276 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
277 if( cc->codec_type == CODEC_TYPE_ATTACHMENT )
279 input_attachment_t *p_attachment;
280 psz_type = "attachment";
281 if( cc->codec_id == CODEC_ID_TTF )
283 p_attachment = vlc_input_attachment_New( p_sys->ic->streams[i]->filename, "application/x-truetype-font", NULL,
284 cc->extradata, (int)cc->extradata_size );
285 TAB_APPEND( p_sys->i_attachments, p_sys->attachments, p_attachment );
287 else msg_Warn( p_demux, "unsupported attachment type in ffmpeg demux" );
292 if( cc->codec_type == CODEC_TYPE_DATA )
295 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
298 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
300 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
301 if( cc->codec_type != CODEC_TYPE_ATTACHMENT )
304 fmt.i_extra = cc->extradata_size;
305 fmt.p_extra = cc->extradata;
307 es = es_out_Add( p_demux->out, &fmt );
309 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
310 psz_type, (char*)&fcc );
311 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
313 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
314 i_start_time = p_sys->ic->start_time * 1000000 / AV_TIME_BASE;
316 msg_Dbg( p_demux, "AVFormat supported stream" );
317 msg_Dbg( p_demux, " - format = %s (%s)",
318 p_sys->fmt->name, p_sys->fmt->long_name );
319 msg_Dbg( p_demux, " - start time = %"PRId64, i_start_time );
320 msg_Dbg( p_demux, " - duration = %"PRId64,
321 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
322 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
324 #if HAVE_FFMPEG_CHAPTERS
325 p_sys->p_title = vlc_input_title_New();
326 for( i = 0; i < p_sys->ic->nb_chapters; i++ )
328 seekpoint_t *s = vlc_seekpoint_New();
330 if( p_sys->ic->chapters[i]->title )
332 s->psz_name = strdup( p_sys->ic->chapters[i]->title );
333 EnsureUTF8( s->psz_name );
334 msg_Dbg( p_demux, " - chapter %d: %s", i, s->psz_name );
336 s->i_time_offset = p_sys->ic->chapters[i]->start * 1000000 *
337 p_sys->ic->chapters[i]->time_base.num /
338 p_sys->ic->chapters[i]->time_base.den -
339 (i_start_time != -1 ? i_start_time : 0 );
340 TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
347 /*****************************************************************************
349 *****************************************************************************/
350 void CloseDemux( vlc_object_t *p_this )
352 demux_t *p_demux = (demux_t*)p_this;
353 demux_sys_t *p_sys = p_demux->p_sys;
356 FREENULL( p_sys->tk );
358 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
359 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
360 if( p_sys->ic ) av_close_input_file( p_sys->ic );
361 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
363 for( int i = 0; i < p_sys->i_attachments; i++ )
364 free( p_sys->attachments[i] );
365 TAB_CLEAN( p_sys->i_attachments, p_sys->attachments);
368 vlc_input_title_Delete( p_sys->p_title );
370 free( p_sys->io_buffer );
374 /*****************************************************************************
376 *****************************************************************************/
377 static int Demux( demux_t *p_demux )
379 demux_sys_t *p_sys = p_demux->p_sys;
382 int64_t i_start_time;
385 if( av_read_frame( p_sys->ic, &pkt ) )
389 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
391 av_free_packet( &pkt );
394 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
399 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
401 if( pkt.flags & PKT_FLAG_KEY )
402 p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
404 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
405 ( p_sys->ic->start_time * 1000000 / AV_TIME_BASE ) : 0;
407 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
408 0 : (pkt.dts) * 1000000 *
409 p_sys->ic->streams[pkt.stream_index]->time_base.num /
410 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
411 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
412 0 : (pkt.pts) * 1000000 *
413 p_sys->ic->streams[pkt.stream_index]->time_base.num /
414 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
415 if( pkt.duration > 0 )
416 p_frame->i_length = pkt.duration * 1000000 *
417 p_sys->ic->streams[pkt.stream_index]->time_base.num /
418 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
420 #ifdef AVFORMAT_DEBUG
421 msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
422 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
426 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
428 p_sys->i_pcr_tk = pkt.stream_index;
429 p_sys->i_pcr = p_frame->i_dts;
431 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
434 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
436 UpdateSeekPoint( p_demux, p_sys->i_pcr);
437 av_free_packet( &pkt );
441 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time )
443 demux_sys_t *p_sys = p_demux->p_sys;
446 if( !p_sys->p_title )
449 for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
451 if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
456 if( i != p_demux->info.i_seekpoint && i >= 0 )
458 p_demux->info.i_seekpoint = i;
459 p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
463 /*****************************************************************************
465 *****************************************************************************/
466 static int Control( demux_t *p_demux, int i_query, va_list args )
468 demux_sys_t *p_sys = p_demux->p_sys;
474 case DEMUX_GET_POSITION:
475 pf = (double*) va_arg( args, double* ); *pf = 0.0;
476 i64 = stream_Size( p_demux->s );
479 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
482 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
484 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
489 case DEMUX_SET_POSITION:
490 f = (double) va_arg( args, double );
491 i64 = stream_Tell( p_demux->s );
492 if( p_sys->i_pcr > 0 )
494 i64 = p_sys->ic->duration * f;
495 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
496 i64 += p_sys->ic->start_time;
498 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
500 /* If we have a duration, we prefer to seek by time
501 but if we don't, or if the seek fails, try BYTE seeking */
502 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
503 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
505 int64_t i_size = stream_Size( p_demux->s );
507 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
508 if( av_seek_frame( p_sys->ic, -1, (i_size * f), AVSEEK_FLAG_BYTE ) < 0 )
511 UpdateSeekPoint( p_demux, i64 );
512 p_sys->i_pcr = -1; /* Invalidate time display */
516 case DEMUX_GET_LENGTH:
517 pi64 = (int64_t*)va_arg( args, int64_t * );
518 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
520 *pi64 = p_sys->ic->duration;
526 pi64 = (int64_t*)va_arg( args, int64_t * );
527 *pi64 = p_sys->i_pcr;
531 i64 = (int64_t)va_arg( args, int64_t );
532 i64 = i64 *AV_TIME_BASE / 1000000;
533 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
534 i64 += p_sys->ic->start_time;
536 msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
538 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
542 p_sys->i_pcr = -1; /* Invalidate time display */
543 UpdateSeekPoint( p_demux, i64 );
548 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
550 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
551 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
552 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
557 if( p_sys->ic->title[0] )
558 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
559 if( p_sys->ic->author[0] )
560 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
561 if( p_sys->ic->copyright[0] )
562 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
563 if( p_sys->ic->comment[0] )
564 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
565 if( p_sys->ic->genre[0] )
566 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
570 case DEMUX_GET_ATTACHMENTS:
572 input_attachment_t ***ppp_attach =
573 (input_attachment_t***)va_arg( args, input_attachment_t*** );
574 int *pi_int = (int*)va_arg( args, int * );
577 if( p_sys->i_attachments <= 0 )
580 *pi_int = p_sys->i_attachments;;
581 *ppp_attach = malloc( sizeof(input_attachment_t**) * p_sys->i_attachments );
582 for( i = 0; i < p_sys->i_attachments; i++ )
583 (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] );
587 case DEMUX_GET_TITLE_INFO:
589 input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
590 int *pi_int = (int*)va_arg( args, int* );
591 int *pi_title_offset = (int*)va_arg( args, int* );
592 int *pi_seekpoint_offset = (int*)va_arg( args, int* );
594 if( !p_sys->p_title )
598 *ppp_title = malloc( sizeof( input_title_t**) );
599 (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
600 *pi_title_offset = 0;
601 *pi_seekpoint_offset = 0;
604 case DEMUX_SET_TITLE:
606 const int i_title = (int)va_arg( args, int );
607 if( !p_sys->p_title || i_title != 0 )
611 case DEMUX_SET_SEEKPOINT:
613 const int i_seekpoint = (int)va_arg( args, int );
614 if( !p_sys->p_title )
617 i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset *AV_TIME_BASE / 1000000;
618 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
619 i64 += p_sys->ic->start_time;
621 msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
623 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
627 p_sys->i_pcr = -1; /* Invalidate time display */
628 UpdateSeekPoint( p_demux, i64 );
638 /*****************************************************************************
639 * I/O wrappers for libavformat
640 *****************************************************************************/
641 static int IORead( void *opaque, uint8_t *buf, int buf_size )
643 URLContext *p_url = opaque;
644 demux_t *p_demux = p_url->priv_data;
645 if( buf_size < 0 ) return -1;
646 int i_ret = stream_Read( p_demux->s, buf, buf_size );
647 return i_ret ? i_ret : -1;
650 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
652 URLContext *p_url = opaque;
653 demux_t *p_demux = p_url->priv_data;
654 int64_t i_absolute = (int64_t)offset;
655 int64_t i_size = stream_Size( p_demux->s );
657 #ifdef AVFORMAT_DEBUG
658 msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
668 i_absolute = (int64_t)offset;
671 i_absolute = stream_Tell( p_demux->s ) + (int64_t)offset;
674 i_absolute = i_size + (int64_t)offset;
683 if( i_size > 0 && i_absolute >= i_size )
685 msg_Dbg( p_demux, "Trying to seek too far : EOF?" );
689 if( stream_Seek( p_demux->s, i_absolute ) )
691 msg_Warn( p_demux, "we were not allowed to seek, or EOF " );
695 return stream_Tell( p_demux->s );
698 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */