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>
39 #if defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
40 # include <libavformat/avformat.h>
41 #elif defined(HAVE_FFMPEG_AVFORMAT_H)
42 # include <ffmpeg/avformat.h>
45 #include "../../codec/avcodec/fourcc.h"
46 #include "../../codec/avcodec/chroma.h"
49 //#define AVFORMAT_DEBUG 1
51 /* Version checking */
52 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
54 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(50<<8)+0) )
55 # define HAVE_FFMPEG_CODEC_ATTACHMENT 1
58 /*****************************************************************************
59 * demux_sys_t: demux descriptor
60 *****************************************************************************/
80 /*****************************************************************************
82 *****************************************************************************/
83 static int Demux ( demux_t *p_demux );
84 static int Control( demux_t *p_demux, int i_query, va_list args );
86 static int IORead( void *opaque, uint8_t *buf, int buf_size );
87 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
89 /*****************************************************************************
91 *****************************************************************************/
92 int OpenDemux( vlc_object_t *p_this )
94 demux_t *p_demux = (demux_t*)p_this;
101 /* Init Probe data */
102 pd.filename = p_demux->psz_path;
103 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
105 msg_Warn( p_demux, "cannot peek" );
109 av_register_all(); /* Can be called several times */
112 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
114 msg_Dbg( p_demux, "couldn't guess format" );
118 /* Don't try to handle MPEG unless forced */
119 if( !p_demux->b_force &&
120 ( !strcmp( fmt->name, "mpeg" ) ||
121 !strcmp( fmt->name, "vcd" ) ||
122 !strcmp( fmt->name, "vob" ) ||
123 !strcmp( fmt->name, "mpegts" ) ||
124 /* libavformat's redirector won't work */
125 !strcmp( fmt->name, "redir" ) ||
126 !strcmp( fmt->name, "sdp" ) ) )
131 /* Don't trigger false alarms on bin files */
132 if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
136 if( !p_demux->psz_path ) return VLC_EGENERIC;
138 i_len = strlen( p_demux->psz_path );
139 if( i_len < 4 ) return VLC_EGENERIC;
141 if( strcasecmp( &p_demux->psz_path[i_len - 4], ".str" ) &&
142 strcasecmp( &p_demux->psz_path[i_len - 4], ".xai" ) &&
143 strcasecmp( &p_demux->psz_path[i_len - 3], ".xa" ) )
149 msg_Dbg( p_demux, "detected format: %s", fmt->name );
151 /* Fill p_demux fields */
152 p_demux->pf_demux = Demux;
153 p_demux->pf_control = Control;
154 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
159 p_sys->i_pcr_tk = -1;
162 /* Create I/O wrapper */
163 p_sys->io_buffer_size = 32768; /* FIXME */
164 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
165 p_sys->url.priv_data = p_demux;
166 p_sys->url.prot = &p_sys->prot;
167 p_sys->url.prot->name = "VLC I/O wrapper";
168 p_sys->url.prot->url_open = 0;
169 p_sys->url.prot->url_read =
170 (int (*) (URLContext *, unsigned char *, int))IORead;
171 p_sys->url.prot->url_write = 0;
172 p_sys->url.prot->url_seek =
173 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
174 p_sys->url.prot->url_close = 0;
175 p_sys->url.prot->next = 0;
176 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
177 0, &p_sys->url, IORead, NULL, IOSeek );
179 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
180 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
183 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
186 msg_Err( p_demux, "av_open_input_stream failed" );
187 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
188 CloseDemux( p_this );
192 if( av_find_stream_info( p_sys->ic ) < 0 )
194 msg_Err( p_demux, "av_find_stream_info failed" );
195 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
196 CloseDemux( p_this );
199 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
201 for( i = 0; i < p_sys->ic->nb_streams; i++ )
203 AVCodecContext *cc = p_sys->ic->streams[i]->codec;
207 const char *psz_type = "unknown";
209 if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
210 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
212 switch( cc->codec_type )
214 case CODEC_TYPE_AUDIO:
215 es_format_Init( &fmt, AUDIO_ES, fcc );
216 fmt.audio.i_channels = cc->channels;
217 fmt.audio.i_rate = cc->sample_rate;
218 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
219 fmt.audio.i_bitspersample = cc->bits_per_sample;
221 fmt.audio.i_bitspersample = cc->bits_per_coded_sample;
223 fmt.audio.i_blockalign = cc->block_align;
226 case CODEC_TYPE_VIDEO:
227 es_format_Init( &fmt, VIDEO_ES, fcc );
229 /* Special case for raw video data */
230 if( cc->codec_id == CODEC_ID_RAWVIDEO )
232 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
233 if( GetVlcChroma( &fmt.video, cc->pix_fmt ) != VLC_SUCCESS)
235 msg_Err( p_demux, "was unable to find a FourCC match for raw video" );
238 fmt.i_codec = fmt.video.i_chroma;
241 fmt.video.i_width = cc->width;
242 fmt.video.i_height = cc->height;
245 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
246 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
250 case CODEC_TYPE_SUBTITLE:
251 es_format_Init( &fmt, SPU_ES, fcc );
252 psz_type = "subtitle";
256 es_format_Init( &fmt, UNKNOWN_ES, 0 );
257 if( cc->codec_type == CODEC_TYPE_DATA )
259 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
260 else if( cc->codec_type == CODEC_TYPE_ATTACHMENT )
261 psz_type = "attachment";
263 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
267 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
268 fmt.i_extra = cc->extradata_size;
269 fmt.p_extra = cc->extradata;
270 es = es_out_Add( p_demux->out, &fmt );
272 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
273 psz_type, (char*)&fcc );
274 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
277 msg_Dbg( p_demux, "AVFormat supported stream" );
278 msg_Dbg( p_demux, " - format = %s (%s)",
279 p_sys->fmt->name, p_sys->fmt->long_name );
280 msg_Dbg( p_demux, " - start time = %"PRId64,
281 ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
282 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
283 msg_Dbg( p_demux, " - duration = %"PRId64,
284 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
285 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
290 /*****************************************************************************
292 *****************************************************************************/
293 void CloseDemux( vlc_object_t *p_this )
295 demux_t *p_demux = (demux_t*)p_this;
296 demux_sys_t *p_sys = p_demux->p_sys;
299 FREENULL( p_sys->tk );
301 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
302 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
303 if( p_sys->ic ) av_close_input_file( p_sys->ic );
304 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
306 free( p_sys->io_buffer );
310 /*****************************************************************************
312 *****************************************************************************/
313 static int Demux( demux_t *p_demux )
315 demux_sys_t *p_sys = p_demux->p_sys;
318 int64_t i_start_time;
321 if( av_read_frame( p_sys->ic, &pkt ) )
325 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
327 av_free_packet( &pkt );
330 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
335 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
337 if( pkt.flags & PKT_FLAG_KEY )
338 p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
340 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
341 ( p_sys->ic->start_time * 1000000 / AV_TIME_BASE ) : 0;
343 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
344 0 : (pkt.dts) * 1000000 *
345 p_sys->ic->streams[pkt.stream_index]->time_base.num /
346 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
347 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
348 0 : (pkt.pts) * 1000000 *
349 p_sys->ic->streams[pkt.stream_index]->time_base.num /
350 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
352 #ifdef AVFORMAT_DEBUG
353 msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
354 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
358 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
360 p_sys->i_pcr_tk = pkt.stream_index;
361 p_sys->i_pcr = p_frame->i_dts;
363 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
366 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
367 av_free_packet( &pkt );
371 /*****************************************************************************
373 *****************************************************************************/
374 static int Control( demux_t *p_demux, int i_query, va_list args )
376 demux_sys_t *p_sys = p_demux->p_sys;
382 case DEMUX_GET_POSITION:
383 pf = (double*) va_arg( args, double* ); *pf = 0.0;
384 i64 = stream_Size( p_demux->s );
387 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
390 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
392 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
397 case DEMUX_SET_POSITION:
398 f = (double) va_arg( args, double );
399 i64 = stream_Tell( p_demux->s );
400 if( p_sys->i_pcr > 0 )
402 i64 = p_sys->ic->duration * f;
403 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
404 i64 += p_sys->ic->start_time;
406 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
408 /* If we have a duration, we prefer to seek by time
409 but if we don't, or if the seek fails, try BYTE seeking */
410 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
411 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
413 int64_t i_size = stream_Size( p_demux->s );
414 i64 = (int64_t)i_size * f;
416 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
417 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
420 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
421 p_sys->i_pcr = -1; /* Invalidate time display */
425 case DEMUX_GET_LENGTH:
426 pi64 = (int64_t*)va_arg( args, int64_t * );
427 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
429 *pi64 = p_sys->ic->duration;
435 pi64 = (int64_t*)va_arg( args, int64_t * );
436 *pi64 = p_sys->i_pcr;
440 i64 = (int64_t)va_arg( args, int64_t );
441 i64 = i64 *AV_TIME_BASE / 1000000;
442 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
443 i64 += p_sys->ic->start_time;
445 msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
447 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
451 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
452 p_sys->i_pcr = -1; /* Invalidate time display */
457 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
459 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
460 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
461 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
466 if( p_sys->ic->title[0] )
467 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
468 if( p_sys->ic->author[0] )
469 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
470 if( p_sys->ic->copyright[0] )
471 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
472 if( p_sys->ic->comment[0] )
473 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
474 if( p_sys->ic->genre[0] )
475 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
484 /*****************************************************************************
485 * I/O wrappers for libavformat
486 *****************************************************************************/
487 static int IORead( void *opaque, uint8_t *buf, int buf_size )
489 URLContext *p_url = opaque;
490 demux_t *p_demux = p_url->priv_data;
491 if( buf_size < 0 ) return -1;
492 int i_ret = stream_Read( p_demux->s, buf, buf_size );
493 return i_ret ? i_ret : -1;
496 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
498 URLContext *p_url = opaque;
499 demux_t *p_demux = p_url->priv_data;
500 int64_t i_absolute = (int64_t)offset;
501 int64_t i_size = stream_Size( p_demux->s );
503 #ifdef AVFORMAT_DEBUG
504 msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
514 i_absolute = (int64_t)offset;
517 i_absolute = stream_Tell( p_demux->s ) + (int64_t)offset;
520 i_absolute = i_size + (int64_t)offset;
529 if( i_size > 0 && i_absolute >= i_size )
531 msg_Dbg( p_demux, "Trying to seek too far : EOF?" );
535 if( stream_Seek( p_demux->s, i_absolute ) )
537 msg_Warn( p_demux, "we were not allowed to seek, or EOF " );
541 return stream_Tell( p_demux->s );
544 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */