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/ffmpeg/fourcc.h"
46 #include "../../codec/ffmpeg/chroma.h"
48 //#define AVFORMAT_DEBUG 1
50 /* Version checking */
51 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
53 /*****************************************************************************
54 * demux_sys_t: demux descriptor
55 *****************************************************************************/
75 /*****************************************************************************
77 *****************************************************************************/
78 static int Demux ( demux_t *p_demux );
79 static int Control( demux_t *p_demux, int i_query, va_list args );
81 static int IORead( void *opaque, uint8_t *buf, int buf_size );
82 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
84 /*****************************************************************************
86 *****************************************************************************/
87 int OpenDemux( vlc_object_t *p_this )
89 demux_t *p_demux = (demux_t*)p_this;
97 pd.filename = p_demux->psz_path;
98 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
100 msg_Warn( p_demux, "cannot peek" );
104 av_register_all(); /* Can be called several times */
107 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
109 msg_Dbg( p_demux, "couldn't guess format" );
113 /* Don't try to handle MPEG unless forced */
114 if( !p_demux->b_force &&
115 ( !strcmp( fmt->name, "mpeg" ) ||
116 !strcmp( fmt->name, "vcd" ) ||
117 !strcmp( fmt->name, "vob" ) ||
118 !strcmp( fmt->name, "mpegts" ) ||
119 /* libavformat's redirector won't work */
120 !strcmp( fmt->name, "redir" ) ||
121 !strcmp( fmt->name, "sdp" ) ) )
126 /* Don't trigger false alarms on bin files */
127 if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
131 if( !p_demux->psz_path ) return VLC_EGENERIC;
133 i_len = strlen( p_demux->psz_path );
134 if( i_len < 4 ) return VLC_EGENERIC;
136 if( strcasecmp( &p_demux->psz_path[i_len - 4], ".str" ) &&
137 strcasecmp( &p_demux->psz_path[i_len - 4], ".xai" ) &&
138 strcasecmp( &p_demux->psz_path[i_len - 3], ".xa" ) )
144 msg_Dbg( p_demux, "detected format: %s", fmt->name );
146 /* Fill p_demux fields */
147 p_demux->pf_demux = Demux;
148 p_demux->pf_control = Control;
149 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
154 p_sys->i_pcr_tk = -1;
157 /* Create I/O wrapper */
158 p_sys->io_buffer_size = 32768; /* FIXME */
159 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
160 p_sys->url.priv_data = p_demux;
161 p_sys->url.prot = &p_sys->prot;
162 p_sys->url.prot->name = "VLC I/O wrapper";
163 p_sys->url.prot->url_open = 0;
164 p_sys->url.prot->url_read =
165 (int (*) (URLContext *, unsigned char *, int))IORead;
166 p_sys->url.prot->url_write = 0;
167 p_sys->url.prot->url_seek =
168 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
169 p_sys->url.prot->url_close = 0;
170 p_sys->url.prot->next = 0;
171 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
172 0, &p_sys->url, IORead, NULL, IOSeek );
174 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
175 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
178 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
181 msg_Err( p_demux, "av_open_input_stream failed" );
182 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
183 CloseDemux( p_this );
187 if( av_find_stream_info( p_sys->ic ) < 0 )
189 msg_Err( p_demux, "av_find_stream_info failed" );
190 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
191 CloseDemux( p_this );
194 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
196 for( i = 0; i < p_sys->ic->nb_streams; i++ )
198 AVCodecContext *cc = p_sys->ic->streams[i]->codec;
203 if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
205 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
207 /* Special case for raw video data */
208 if( cc->codec_id == CODEC_ID_RAWVIDEO )
210 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
211 fcc = GetVlcChroma( cc->pix_fmt );
215 switch( cc->codec_type )
217 case CODEC_TYPE_AUDIO:
218 es_format_Init( &fmt, AUDIO_ES, fcc );
219 fmt.audio.i_channels = cc->channels;
220 fmt.audio.i_rate = cc->sample_rate;
221 fmt.audio.i_bitspersample = cc->bits_per_sample;
222 fmt.audio.i_blockalign = cc->block_align;
224 case CODEC_TYPE_VIDEO:
225 es_format_Init( &fmt, VIDEO_ES, fcc );
226 fmt.video.i_width = cc->width;
227 fmt.video.i_height = cc->height;
230 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
231 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
234 case CODEC_TYPE_SUBTITLE:
235 es_format_Init( &fmt, SPU_ES, fcc );
238 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
242 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
243 fmt.i_extra = cc->extradata_size;
244 fmt.p_extra = cc->extradata;
245 es = es_out_Add( p_demux->out, &fmt );
247 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
248 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
250 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
253 msg_Dbg( p_demux, "AVFormat supported stream" );
254 msg_Dbg( p_demux, " - format = %s (%s)",
255 p_sys->fmt->name, p_sys->fmt->long_name );
256 msg_Dbg( p_demux, " - start time = %"PRId64,
257 ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
258 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
259 msg_Dbg( p_demux, " - duration = %"PRId64,
260 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
261 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
266 /*****************************************************************************
268 *****************************************************************************/
269 void CloseDemux( vlc_object_t *p_this )
271 demux_t *p_demux = (demux_t*)p_this;
272 demux_sys_t *p_sys = p_demux->p_sys;
275 FREENULL( p_sys->tk );
277 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
278 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
279 if( p_sys->ic ) av_close_input_file( p_sys->ic );
280 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
282 free( p_sys->io_buffer );
286 /*****************************************************************************
288 *****************************************************************************/
289 static int Demux( demux_t *p_demux )
291 demux_sys_t *p_sys = p_demux->p_sys;
294 int64_t i_start_time;
297 if( av_read_frame( p_sys->ic, &pkt ) )
301 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
303 av_free_packet( &pkt );
306 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
311 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
313 if( pkt.flags & PKT_FLAG_KEY )
314 p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
316 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
317 ( p_sys->ic->start_time / AV_TIME_BASE ) : 0;
319 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
320 0 : (pkt.dts - i_start_time) * 1000000 *
321 p_sys->ic->streams[pkt.stream_index]->time_base.num /
322 p_sys->ic->streams[pkt.stream_index]->time_base.den;
323 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
324 0 : (pkt.pts - i_start_time) * 1000000 *
325 p_sys->ic->streams[pkt.stream_index]->time_base.num /
326 p_sys->ic->streams[pkt.stream_index]->time_base.den;
328 #ifdef AVFORMAT_DEBUG
329 msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
330 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
334 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
336 p_sys->i_pcr_tk = pkt.stream_index;
337 p_sys->i_pcr = p_frame->i_dts;
339 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
342 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
343 av_free_packet( &pkt );
347 /*****************************************************************************
349 *****************************************************************************/
350 static int Control( demux_t *p_demux, int i_query, va_list args )
352 demux_sys_t *p_sys = p_demux->p_sys;
358 case DEMUX_GET_POSITION:
359 pf = (double*) va_arg( args, double* ); *pf = 0.0;
360 i64 = stream_Size( p_demux->s );
363 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
366 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
368 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
373 case DEMUX_SET_POSITION:
374 f = (double) va_arg( args, double );
375 i64 = stream_Tell( p_demux->s );
376 if( p_sys->i_pcr > 0 )
378 i64 = p_sys->ic->duration * f;
379 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
380 i64 += p_sys->ic->start_time;
382 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
384 /* If we have a duration, we prefer to seek by time
385 but if we don't, or if the seek fails, try BYTE seeking */
386 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
387 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
389 int64_t i_size = stream_Size( p_demux->s );
390 i64 = (int64_t)i_size * f;
392 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
393 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
396 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
397 p_sys->i_pcr = -1; /* Invalidate time display */
401 case DEMUX_GET_LENGTH:
402 pi64 = (int64_t*)va_arg( args, int64_t * );
403 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
405 *pi64 = p_sys->ic->duration;
411 pi64 = (int64_t*)va_arg( args, int64_t * );
412 *pi64 = p_sys->i_pcr;
416 i64 = (int64_t)va_arg( args, int64_t );
417 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
418 i64 += p_sys->ic->start_time;
420 msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
422 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
426 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
427 p_sys->i_pcr = -1; /* Invalidate time display */
432 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
434 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
435 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
436 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
441 if( p_sys->ic->title[0] )
442 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
443 if( p_sys->ic->author[0] )
444 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
445 if( p_sys->ic->copyright[0] )
446 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
447 if( p_sys->ic->comment[0] )
448 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
449 if( p_sys->ic->genre[0] )
450 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
459 /*****************************************************************************
460 * I/O wrappers for libavformat
461 *****************************************************************************/
462 static int IORead( void *opaque, uint8_t *buf, int buf_size )
464 URLContext *p_url = opaque;
465 demux_t *p_demux = p_url->priv_data;
466 int i_ret = stream_Read( p_demux->s, buf, buf_size );
467 return i_ret ? i_ret : -1;
470 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
472 URLContext *p_url = opaque;
473 demux_t *p_demux = p_url->priv_data;
474 int64_t i_absolute = (int64_t)offset;
475 int64_t i_size = stream_Size( p_demux->s );
477 #ifdef AVFORMAT_DEBUG
478 msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
486 i_absolute = stream_Tell( p_demux->s ) + offset;
489 i_absolute = i_size + offset;
499 if( i_absolute > i_size )
501 if( stream_Tell( p_demux->s ) >= i_size )
503 msg_Err( p_demux, "Seeking too far : EOF?" );
508 if( stream_Seek( p_demux->s, i_absolute ) )
513 return stream_Tell( p_demux->s );
516 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */