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>
33 #include <vlc_input.h>
36 #ifdef HAVE_FFMPEG_AVFORMAT_H
37 # include <ffmpeg/avformat.h>
38 #elif defined(HAVE_LIBAVFORMAT_TREE)
39 # include <avformat.h>
44 //#define AVFORMAT_DEBUG 1
46 /* Version checking */
47 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE)
49 /*****************************************************************************
50 * demux_sys_t: demux descriptor
51 *****************************************************************************/
71 /*****************************************************************************
73 *****************************************************************************/
74 static int Demux ( demux_t *p_demux );
75 static int Control( demux_t *p_demux, int i_query, va_list args );
77 static int IORead( void *opaque, uint8_t *buf, int buf_size );
78 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
80 /*****************************************************************************
82 *****************************************************************************/
83 int E_(OpenDemux)( vlc_object_t *p_this )
85 demux_t *p_demux = (demux_t*)p_this;
90 vlc_bool_t b_avfmt_nofile;
93 pd.filename = p_demux->psz_path;
94 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
96 msg_Warn( p_demux, "cannot peek" );
100 av_register_all(); /* Can be called several times */
103 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
105 msg_Dbg( p_demux, "couldn't guess format" );
109 /* Don't try to handle MPEG unless forced */
110 if( !p_demux->b_force &&
111 ( !strcmp( fmt->name, "mpeg" ) ||
112 !strcmp( fmt->name, "vcd" ) ||
113 !strcmp( fmt->name, "vob" ) ||
114 !strcmp( fmt->name, "mpegts" ) ||
115 /* libavformat's redirector won't work */
116 !strcmp( fmt->name, "redir" ) ||
117 !strcmp( fmt->name, "sdp" ) ) )
122 /* Don't trigger false alarms on bin files */
123 if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
127 if( !p_demux->psz_path ) return VLC_EGENERIC;
129 i_len = strlen( p_demux->psz_path );
130 if( i_len < 4 ) return VLC_EGENERIC;
132 if( strcasecmp( &p_demux->psz_path[i_len - 4], ".str" ) &&
133 strcasecmp( &p_demux->psz_path[i_len - 4], ".xai" ) &&
134 strcasecmp( &p_demux->psz_path[i_len - 3], ".xa" ) )
140 msg_Dbg( p_demux, "detected format: %s", fmt->name );
142 /* Fill p_demux fields */
143 p_demux->pf_demux = Demux;
144 p_demux->pf_control = Control;
145 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
150 p_sys->i_pcr_tk = -1;
153 /* Create I/O wrapper */
154 p_sys->io_buffer_size = 32768; /* FIXME */
155 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
156 p_sys->url.priv_data = p_demux;
157 p_sys->url.prot = &p_sys->prot;
158 p_sys->url.prot->name = "VLC I/O wrapper";
159 p_sys->url.prot->url_open = 0;
160 p_sys->url.prot->url_read =
161 (int (*) (URLContext *, unsigned char *, int))IORead;
162 p_sys->url.prot->url_write = 0;
163 p_sys->url.prot->url_seek =
164 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
165 p_sys->url.prot->url_close = 0;
166 p_sys->url.prot->next = 0;
167 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
168 0, &p_sys->url, IORead, NULL, IOSeek );
170 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
171 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
174 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
177 msg_Err( p_demux, "av_open_input_stream failed" );
178 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
179 E_(CloseDemux)( p_this );
183 if( av_find_stream_info( p_sys->ic ) < 0 )
185 msg_Err( p_demux, "av_find_stream_info failed" );
186 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
187 E_(CloseDemux)( p_this );
190 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
192 for( i = 0; i < p_sys->ic->nb_streams; i++ )
194 AVCodecContext *cc = p_sys->ic->streams[i]->codec;
199 if( !E_(GetVlcFourcc)( cc->codec_id, NULL, &fcc, NULL ) )
201 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
203 /* Special case for raw video data */
204 if( cc->codec_id == CODEC_ID_RAWVIDEO )
206 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
207 fcc = E_(GetVlcChroma)( cc->pix_fmt );
211 switch( cc->codec_type )
213 case CODEC_TYPE_AUDIO:
214 es_format_Init( &fmt, AUDIO_ES, fcc );
215 fmt.audio.i_channels = cc->channels;
216 fmt.audio.i_rate = cc->sample_rate;
217 fmt.audio.i_bitspersample = cc->bits_per_sample;
218 fmt.audio.i_blockalign = cc->block_align;
220 case CODEC_TYPE_VIDEO:
221 es_format_Init( &fmt, VIDEO_ES, fcc );
222 fmt.video.i_width = cc->width;
223 fmt.video.i_height = cc->height;
226 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
227 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
230 case CODEC_TYPE_SUBTITLE:
231 es_format_Init( &fmt, SPU_ES, fcc );
234 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
238 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
239 fmt.i_extra = cc->extradata_size;
240 fmt.p_extra = cc->extradata;
241 es = es_out_Add( p_demux->out, &fmt );
243 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
244 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
246 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
249 msg_Dbg( p_demux, "AVFormat supported stream" );
250 msg_Dbg( p_demux, " - format = %s (%s)",
251 p_sys->fmt->name, p_sys->fmt->long_name );
252 msg_Dbg( p_demux, " - start time = "I64Fd,
253 ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
254 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
255 msg_Dbg( p_demux, " - duration = "I64Fd,
256 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
257 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
259 input_thread_t *p_input = (input_thread_t *)vlc_object_find( p_demux, VLC_OBJECT_INPUT, FIND_PARENT );
262 module_t *p_meta = module_Need( p_demux, "meta reader", NULL, 0 );
265 vlc_meta_Merge( input_GetItem(p_input)->p_meta, (vlc_meta_t*)(p_demux->p_private ) );
266 module_Unneed( p_demux, p_meta );
268 vlc_object_release( p_input );
274 /*****************************************************************************
276 *****************************************************************************/
277 void E_(CloseDemux)( vlc_object_t *p_this )
279 demux_t *p_demux = (demux_t*)p_this;
280 demux_sys_t *p_sys = p_demux->p_sys;
281 vlc_bool_t b_avfmt_nofile;
283 FREENULL( p_sys->tk );
285 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
286 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
287 if( p_sys->ic ) av_close_input_file( p_sys->ic );
288 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
290 if( p_sys->io_buffer ) free( p_sys->io_buffer );
294 /*****************************************************************************
296 *****************************************************************************/
297 static int Demux( demux_t *p_demux )
299 demux_sys_t *p_sys = p_demux->p_sys;
302 int64_t i_start_time;
305 if( av_read_frame( p_sys->ic, &pkt ) )
309 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
311 av_free_packet( &pkt );
314 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
319 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
321 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
322 p_sys->ic->start_time : 0;
324 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
325 0 : (pkt.dts - i_start_time) * 1000000 *
326 p_sys->ic->streams[pkt.stream_index]->time_base.num /
327 p_sys->ic->streams[pkt.stream_index]->time_base.den;
328 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
329 0 : (pkt.pts - i_start_time) * 1000000 *
330 p_sys->ic->streams[pkt.stream_index]->time_base.num /
331 p_sys->ic->streams[pkt.stream_index]->time_base.den;
333 #ifdef AVFORMAT_DEBUG
334 msg_Dbg( p_demux, "tk[%d] dts="I64Fd" pts="I64Fd,
335 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
339 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
341 p_sys->i_pcr_tk = pkt.stream_index;
342 p_sys->i_pcr = p_frame->i_dts;
344 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
347 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
348 av_free_packet( &pkt );
352 /*****************************************************************************
354 *****************************************************************************/
355 static int Control( demux_t *p_demux, int i_query, va_list args )
357 demux_sys_t *p_sys = p_demux->p_sys;
363 case DEMUX_GET_POSITION:
364 pf = (double*) va_arg( args, double* ); *pf = 0.0;
365 i64 = stream_Size( p_demux->s );
368 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
371 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
373 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
378 case DEMUX_SET_POSITION:
379 f = (double) va_arg( args, double );
380 i64 = stream_Tell( p_demux->s );
381 if( p_sys->i_pcr > 0 )
383 i64 = p_sys->ic->duration * f;
384 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
385 i64 += p_sys->ic->start_time;
387 msg_Warn( p_demux, "DEMUX_SET_POSITION: "I64Fd, i64 );
389 /* If we have a duration, we prefer to seek by time
390 but if we don't, or if the seek fails, try BYTE seeking */
391 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
392 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
394 int64_t i_size = stream_Size( p_demux->s );
395 i64 = (int64_t)i_size * f;
397 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: "I64Fd, i64 );
398 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
401 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
402 p_sys->i_pcr = -1; /* Invalidate time display */
406 case DEMUX_GET_LENGTH:
407 pi64 = (int64_t*)va_arg( args, int64_t * );
408 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
410 *pi64 = p_sys->ic->duration;
416 pi64 = (int64_t*)va_arg( args, int64_t * );
417 *pi64 = p_sys->i_pcr;
421 i64 = (int64_t)va_arg( args, int64_t );
422 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
423 i64 += p_sys->ic->start_time;
425 msg_Warn( p_demux, "DEMUX_SET_TIME: "I64Fd, i64 );
427 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
431 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
432 p_sys->i_pcr = -1; /* Invalidate time display */
437 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
439 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
440 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
441 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
446 if( p_sys->ic->title[0] )
447 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
448 if( p_sys->ic->author[0] )
449 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
450 if( p_sys->ic->copyright[0] )
451 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
452 if( p_sys->ic->comment[0] )
453 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
454 if( p_sys->ic->genre[0] )
455 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
464 /*****************************************************************************
465 * I/O wrappers for libavformat
466 *****************************************************************************/
467 static int IORead( void *opaque, uint8_t *buf, int buf_size )
469 URLContext *p_url = opaque;
470 demux_t *p_demux = p_url->priv_data;
471 int i_ret = stream_Read( p_demux->s, buf, buf_size );
472 return i_ret ? i_ret : -1;
475 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
477 URLContext *p_url = opaque;
478 demux_t *p_demux = p_url->priv_data;
479 int64_t i_absolute = (int64_t)offset;
480 int64_t i_size = stream_Size( p_demux->s );
482 #ifdef AVFORMAT_DEBUG
483 msg_Warn( p_demux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
491 i_absolute = stream_Tell( p_demux->s ) + offset;
494 i_absolute = i_size + offset;
502 if( i_size && i_absolute > i_size )
505 if( stream_Seek( p_demux->s, i_absolute ) )
510 return stream_Tell( p_demux->s );
513 #else /* HAVE_FFMPEG_AVFORMAT_H */
515 int E_(OpenDemux)( vlc_object_t *p_this )
520 void E_(CloseDemux)( vlc_object_t *p_this )
524 #endif /* HAVE_FFMPEG_AVFORMAT_H */