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 *****************************************************************************/
30 #include <vlc_demux.h>
31 #include <vlc_stream.h>
35 #ifdef HAVE_FFMPEG_AVFORMAT_H
36 # include <ffmpeg/avformat.h>
37 #elif defined(HAVE_LIBAVFORMAT_TREE)
38 # include <avformat.h>
43 //#define AVFORMAT_DEBUG 1
45 /* Version checking */
46 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE)
48 /*****************************************************************************
49 * demux_sys_t: demux descriptor
50 *****************************************************************************/
70 /*****************************************************************************
72 *****************************************************************************/
73 static int Demux ( demux_t *p_demux );
74 static int Control( demux_t *p_demux, int i_query, va_list args );
76 static int IORead( void *opaque, uint8_t *buf, int buf_size );
77 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
79 /*****************************************************************************
81 *****************************************************************************/
82 int E_(OpenDemux)( vlc_object_t *p_this )
84 demux_t *p_demux = (demux_t*)p_this;
89 vlc_bool_t b_avfmt_nofile;
92 pd.filename = p_demux->psz_path;
93 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
95 msg_Warn( p_demux, "cannot peek" );
99 av_register_all(); /* Can be called several times */
102 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
104 msg_Dbg( p_demux, "couldn't guess format" );
108 /* Don't try to handle MPEG unless forced */
109 if( !p_demux->b_force &&
110 ( !strcmp( fmt->name, "mpeg" ) ||
111 !strcmp( fmt->name, "vcd" ) ||
112 !strcmp( fmt->name, "vob" ) ||
113 !strcmp( fmt->name, "mpegts" ) ||
114 /* libavformat's redirector won't work */
115 !strcmp( fmt->name, "redir" ) ||
116 !strcmp( fmt->name, "sdp" ) ) )
121 /* Don't trigger false alarms on bin files */
122 if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
126 if( !p_demux->psz_path ) return VLC_EGENERIC;
128 i_len = strlen( p_demux->psz_path );
129 if( i_len < 4 ) return VLC_EGENERIC;
131 if( strcasecmp( &p_demux->psz_path[i_len - 4], ".str" ) &&
132 strcasecmp( &p_demux->psz_path[i_len - 4], ".xai" ) &&
133 strcasecmp( &p_demux->psz_path[i_len - 3], ".xa" ) )
139 msg_Dbg( p_demux, "detected format: %s", fmt->name );
141 /* Fill p_demux fields */
142 p_demux->pf_demux = Demux;
143 p_demux->pf_control = Control;
144 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
149 p_sys->i_pcr_tk = -1;
152 /* Create I/O wrapper */
153 p_sys->io_buffer_size = 32768; /* FIXME */
154 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
155 p_sys->url.priv_data = p_demux;
156 p_sys->url.prot = &p_sys->prot;
157 p_sys->url.prot->name = "VLC I/O wrapper";
158 p_sys->url.prot->url_open = 0;
159 p_sys->url.prot->url_read =
160 (int (*) (URLContext *, unsigned char *, int))IORead;
161 p_sys->url.prot->url_write = 0;
162 p_sys->url.prot->url_seek =
163 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
164 p_sys->url.prot->url_close = 0;
165 p_sys->url.prot->next = 0;
166 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
167 0, &p_sys->url, IORead, NULL, IOSeek );
169 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
170 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
173 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
176 msg_Err( p_demux, "av_open_input_stream failed" );
177 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
178 E_(CloseDemux)( p_this );
182 if( av_find_stream_info( p_sys->ic ) < 0 )
184 msg_Err( p_demux, "av_find_stream_info failed" );
185 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
186 E_(CloseDemux)( p_this );
189 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
191 for( i = 0; i < p_sys->ic->nb_streams; i++ )
193 AVCodecContext *cc = p_sys->ic->streams[i]->codec;
198 if( !E_(GetVlcFourcc)( cc->codec_id, NULL, &fcc, NULL ) )
200 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
202 /* Special case for raw video data */
203 if( cc->codec_id == CODEC_ID_RAWVIDEO )
205 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
206 fcc = E_(GetVlcChroma)( cc->pix_fmt );
210 switch( cc->codec_type )
212 case CODEC_TYPE_AUDIO:
213 es_format_Init( &fmt, AUDIO_ES, fcc );
214 fmt.audio.i_channels = cc->channels;
215 fmt.audio.i_rate = cc->sample_rate;
216 fmt.audio.i_bitspersample = cc->bits_per_sample;
217 fmt.audio.i_blockalign = cc->block_align;
219 case CODEC_TYPE_VIDEO:
220 es_format_Init( &fmt, VIDEO_ES, fcc );
221 fmt.video.i_width = cc->width;
222 fmt.video.i_height = cc->height;
225 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
226 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
229 case CODEC_TYPE_SUBTITLE:
230 es_format_Init( &fmt, SPU_ES, fcc );
233 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
237 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
238 fmt.i_extra = cc->extradata_size;
239 fmt.p_extra = cc->extradata;
240 es = es_out_Add( p_demux->out, &fmt );
242 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
243 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
245 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
248 msg_Dbg( p_demux, "AVFormat supported stream" );
249 msg_Dbg( p_demux, " - format = %s (%s)",
250 p_sys->fmt->name, p_sys->fmt->long_name );
251 msg_Dbg( p_demux, " - start time = "I64Fd,
252 ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
253 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
254 msg_Dbg( p_demux, " - duration = "I64Fd,
255 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
256 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
261 /*****************************************************************************
263 *****************************************************************************/
264 void E_(CloseDemux)( vlc_object_t *p_this )
266 demux_t *p_demux = (demux_t*)p_this;
267 demux_sys_t *p_sys = p_demux->p_sys;
268 vlc_bool_t b_avfmt_nofile;
270 FREENULL( p_sys->tk );
272 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
273 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
274 if( p_sys->ic ) av_close_input_file( p_sys->ic );
275 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
277 if( p_sys->io_buffer ) free( p_sys->io_buffer );
281 /*****************************************************************************
283 *****************************************************************************/
284 static int Demux( demux_t *p_demux )
286 demux_sys_t *p_sys = p_demux->p_sys;
289 int64_t i_start_time;
292 if( av_read_frame( p_sys->ic, &pkt ) )
296 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
298 av_free_packet( &pkt );
301 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
306 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
308 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
309 p_sys->ic->start_time : 0;
311 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
312 0 : (pkt.dts - i_start_time) * 1000000 *
313 p_sys->ic->streams[pkt.stream_index]->time_base.num /
314 p_sys->ic->streams[pkt.stream_index]->time_base.den;
315 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
316 0 : (pkt.pts - i_start_time) * 1000000 *
317 p_sys->ic->streams[pkt.stream_index]->time_base.num /
318 p_sys->ic->streams[pkt.stream_index]->time_base.den;
320 #ifdef AVFORMAT_DEBUG
321 msg_Dbg( p_demux, "tk[%d] dts="I64Fd" pts="I64Fd,
322 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
326 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
328 p_sys->i_pcr_tk = pkt.stream_index;
329 p_sys->i_pcr = p_frame->i_dts;
331 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
334 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
335 av_free_packet( &pkt );
339 /*****************************************************************************
341 *****************************************************************************/
342 static int Control( demux_t *p_demux, int i_query, va_list args )
344 demux_sys_t *p_sys = p_demux->p_sys;
350 case DEMUX_GET_POSITION:
351 pf = (double*) va_arg( args, double* ); *pf = 0.0;
352 i64 = stream_Size( p_demux->s );
355 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
358 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
360 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
365 case DEMUX_SET_POSITION:
366 f = (double) va_arg( args, double );
367 i64 = stream_Tell( p_demux->s );
368 if( p_sys->i_pcr > 0 )
370 i64 = p_sys->ic->duration * f;
371 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
372 i64 += p_sys->ic->start_time;
374 msg_Warn( p_demux, "DEMUX_SET_POSITION: "I64Fd, i64 );
376 /* If we have a duration, we prefer to seek by time
377 but if we don't, or if the seek fails, try BYTE seeking */
378 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
379 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
381 int64_t i_size = stream_Size( p_demux->s );
382 i64 = (int64_t)i_size * f;
384 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: "I64Fd, i64 );
385 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
388 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
389 p_sys->i_pcr = -1; /* Invalidate time display */
393 case DEMUX_GET_LENGTH:
394 pi64 = (int64_t*)va_arg( args, int64_t * );
395 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
397 *pi64 = p_sys->ic->duration;
403 pi64 = (int64_t*)va_arg( args, int64_t * );
404 *pi64 = p_sys->i_pcr;
408 i64 = (int64_t)va_arg( args, int64_t );
409 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
410 i64 += p_sys->ic->start_time;
412 msg_Warn( p_demux, "DEMUX_SET_TIME: "I64Fd, i64 );
414 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
418 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
419 p_sys->i_pcr = -1; /* Invalidate time display */
424 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
426 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
427 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
428 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
433 if( p_sys->ic->title[0] )
434 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
435 if( p_sys->ic->author[0] )
436 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
437 if( p_sys->ic->copyright[0] )
438 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
439 if( p_sys->ic->comment[0] )
440 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
441 if( p_sys->ic->genre[0] )
442 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
451 /*****************************************************************************
452 * I/O wrappers for libavformat
453 *****************************************************************************/
454 static int IORead( void *opaque, uint8_t *buf, int buf_size )
456 URLContext *p_url = opaque;
457 demux_t *p_demux = p_url->priv_data;
458 int i_ret = stream_Read( p_demux->s, buf, buf_size );
459 return i_ret ? i_ret : -1;
462 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
464 URLContext *p_url = opaque;
465 demux_t *p_demux = p_url->priv_data;
466 int64_t i_absolute = (int64_t)offset;
467 int64_t i_size = stream_Size( p_demux->s );
469 #ifdef AVFORMAT_DEBUG
470 msg_Warn( p_demux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
478 i_absolute = stream_Tell( p_demux->s ) + offset;
481 i_absolute = i_size + offset;
489 if( i_size && i_absolute > i_size )
492 if( stream_Seek( p_demux->s, i_absolute ) )
497 return stream_Tell( p_demux->s );
500 #else /* HAVE_FFMPEG_AVFORMAT_H */
502 int E_(OpenDemux)( vlc_object_t *p_this )
507 void E_(CloseDemux)( vlc_object_t *p_this )
511 #endif /* HAVE_FFMPEG_AVFORMAT_H */