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 *****************************************************************************/
34 #include <vlc_demux.h>
35 #include <vlc_stream.h>
39 #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H
40 # include <libavformat/avformat.h>
41 #elif defined(HAVE_LIBAVFORMAT_TREE)
42 # include <avformat.h>
47 //#define AVFORMAT_DEBUG 1
49 /* Version checking */
50 #if defined(HAVE_LIBAVFORMAT_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE)
52 /*****************************************************************************
53 * demux_sys_t: demux descriptor
54 *****************************************************************************/
74 /*****************************************************************************
76 *****************************************************************************/
77 static int Demux ( demux_t *p_demux );
78 static int Control( demux_t *p_demux, int i_query, va_list args );
80 static int IORead( void *opaque, uint8_t *buf, int buf_size );
81 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
83 /*****************************************************************************
85 *****************************************************************************/
86 int E_(OpenDemux)( vlc_object_t *p_this )
88 demux_t *p_demux = (demux_t*)p_this;
93 vlc_bool_t b_avfmt_nofile;
96 pd.filename = p_demux->psz_path;
97 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
99 msg_Warn( p_demux, "cannot peek" );
103 av_register_all(); /* Can be called several times */
106 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
108 msg_Dbg( p_demux, "couldn't guess format" );
112 /* Don't try to handle MPEG unless forced */
113 if( !p_demux->b_force &&
114 ( !strcmp( fmt->name, "mpeg" ) ||
115 !strcmp( fmt->name, "vcd" ) ||
116 !strcmp( fmt->name, "vob" ) ||
117 !strcmp( fmt->name, "mpegts" ) ||
118 /* libavformat's redirector won't work */
119 !strcmp( fmt->name, "redir" ) ||
120 !strcmp( fmt->name, "sdp" ) ) )
125 /* Don't trigger false alarms on bin files */
126 if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
130 if( !p_demux->psz_path ) return VLC_EGENERIC;
132 i_len = strlen( p_demux->psz_path );
133 if( i_len < 4 ) return VLC_EGENERIC;
135 if( strcasecmp( &p_demux->psz_path[i_len - 4], ".str" ) &&
136 strcasecmp( &p_demux->psz_path[i_len - 4], ".xai" ) &&
137 strcasecmp( &p_demux->psz_path[i_len - 3], ".xa" ) )
143 msg_Dbg( p_demux, "detected format: %s", fmt->name );
145 /* Fill p_demux fields */
146 p_demux->pf_demux = Demux;
147 p_demux->pf_control = Control;
148 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
153 p_sys->i_pcr_tk = -1;
156 /* Create I/O wrapper */
157 p_sys->io_buffer_size = 32768; /* FIXME */
158 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
159 p_sys->url.priv_data = p_demux;
160 p_sys->url.prot = &p_sys->prot;
161 p_sys->url.prot->name = "VLC I/O wrapper";
162 p_sys->url.prot->url_open = 0;
163 p_sys->url.prot->url_read =
164 (int (*) (URLContext *, unsigned char *, int))IORead;
165 p_sys->url.prot->url_write = 0;
166 p_sys->url.prot->url_seek =
167 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
168 p_sys->url.prot->url_close = 0;
169 p_sys->url.prot->next = 0;
170 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
171 0, &p_sys->url, IORead, NULL, IOSeek );
173 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
174 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
177 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
180 msg_Err( p_demux, "av_open_input_stream failed" );
181 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
182 E_(CloseDemux)( p_this );
186 if( av_find_stream_info( p_sys->ic ) < 0 )
188 msg_Err( p_demux, "av_find_stream_info failed" );
189 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
190 E_(CloseDemux)( p_this );
193 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
195 for( i = 0; i < p_sys->ic->nb_streams; i++ )
197 AVCodecContext *cc = p_sys->ic->streams[i]->codec;
202 if( !E_(GetVlcFourcc)( cc->codec_id, NULL, &fcc, NULL ) )
204 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
206 /* Special case for raw video data */
207 if( cc->codec_id == CODEC_ID_RAWVIDEO )
209 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
210 fcc = E_(GetVlcChroma)( cc->pix_fmt );
214 switch( cc->codec_type )
216 case CODEC_TYPE_AUDIO:
217 es_format_Init( &fmt, AUDIO_ES, fcc );
218 fmt.audio.i_channels = cc->channels;
219 fmt.audio.i_rate = cc->sample_rate;
220 fmt.audio.i_bitspersample = cc->bits_per_sample;
221 fmt.audio.i_blockalign = cc->block_align;
223 case CODEC_TYPE_VIDEO:
224 es_format_Init( &fmt, VIDEO_ES, fcc );
225 fmt.video.i_width = cc->width;
226 fmt.video.i_height = cc->height;
229 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
230 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
233 case CODEC_TYPE_SUBTITLE:
234 es_format_Init( &fmt, SPU_ES, fcc );
237 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
241 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
242 fmt.i_extra = cc->extradata_size;
243 fmt.p_extra = cc->extradata;
244 es = es_out_Add( p_demux->out, &fmt );
246 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
247 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
249 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
252 msg_Dbg( p_demux, "AVFormat supported stream" );
253 msg_Dbg( p_demux, " - format = %s (%s)",
254 p_sys->fmt->name, p_sys->fmt->long_name );
255 msg_Dbg( p_demux, " - start time = "I64Fd,
256 ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
257 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
258 msg_Dbg( p_demux, " - duration = "I64Fd,
259 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
260 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
265 /*****************************************************************************
267 *****************************************************************************/
268 void E_(CloseDemux)( vlc_object_t *p_this )
270 demux_t *p_demux = (demux_t*)p_this;
271 demux_sys_t *p_sys = p_demux->p_sys;
272 vlc_bool_t b_avfmt_nofile;
274 FREENULL( p_sys->tk );
276 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
277 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
278 if( p_sys->ic ) av_close_input_file( p_sys->ic );
279 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
281 if( p_sys->io_buffer ) free( p_sys->io_buffer );
285 /*****************************************************************************
287 *****************************************************************************/
288 static int Demux( demux_t *p_demux )
290 demux_sys_t *p_sys = p_demux->p_sys;
293 int64_t i_start_time;
296 if( av_read_frame( p_sys->ic, &pkt ) )
300 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
302 av_free_packet( &pkt );
305 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
310 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
312 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
313 p_sys->ic->start_time : 0;
315 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
316 0 : (pkt.dts - 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;
319 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
320 0 : (pkt.pts - 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;
324 #ifdef AVFORMAT_DEBUG
325 msg_Dbg( p_demux, "tk[%d] dts="I64Fd" pts="I64Fd,
326 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
330 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
332 p_sys->i_pcr_tk = pkt.stream_index;
333 p_sys->i_pcr = p_frame->i_dts;
335 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
338 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
339 av_free_packet( &pkt );
343 /*****************************************************************************
345 *****************************************************************************/
346 static int Control( demux_t *p_demux, int i_query, va_list args )
348 demux_sys_t *p_sys = p_demux->p_sys;
354 case DEMUX_GET_POSITION:
355 pf = (double*) va_arg( args, double* ); *pf = 0.0;
356 i64 = stream_Size( p_demux->s );
359 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
362 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
364 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
369 case DEMUX_SET_POSITION:
370 f = (double) va_arg( args, double );
371 i64 = stream_Tell( p_demux->s );
372 if( p_sys->i_pcr > 0 )
374 i64 = p_sys->ic->duration * f;
375 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
376 i64 += p_sys->ic->start_time;
378 msg_Warn( p_demux, "DEMUX_SET_POSITION: "I64Fd, i64 );
380 /* If we have a duration, we prefer to seek by time
381 but if we don't, or if the seek fails, try BYTE seeking */
382 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
383 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
385 int64_t i_size = stream_Size( p_demux->s );
386 i64 = (int64_t)i_size * f;
388 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: "I64Fd, i64 );
389 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
392 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
393 p_sys->i_pcr = -1; /* Invalidate time display */
397 case DEMUX_GET_LENGTH:
398 pi64 = (int64_t*)va_arg( args, int64_t * );
399 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
401 *pi64 = p_sys->ic->duration;
407 pi64 = (int64_t*)va_arg( args, int64_t * );
408 *pi64 = p_sys->i_pcr;
412 i64 = (int64_t)va_arg( args, int64_t );
413 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
414 i64 += p_sys->ic->start_time;
416 msg_Warn( p_demux, "DEMUX_SET_TIME: "I64Fd, i64 );
418 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
422 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
423 p_sys->i_pcr = -1; /* Invalidate time display */
428 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
430 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
431 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
432 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
437 if( p_sys->ic->title[0] )
438 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
439 if( p_sys->ic->author[0] )
440 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
441 if( p_sys->ic->copyright[0] )
442 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
443 if( p_sys->ic->comment[0] )
444 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
445 if( p_sys->ic->genre[0] )
446 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
455 /*****************************************************************************
456 * I/O wrappers for libavformat
457 *****************************************************************************/
458 static int IORead( void *opaque, uint8_t *buf, int buf_size )
460 URLContext *p_url = opaque;
461 demux_t *p_demux = p_url->priv_data;
462 int i_ret = stream_Read( p_demux->s, buf, buf_size );
463 return i_ret ? i_ret : -1;
466 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
468 URLContext *p_url = opaque;
469 demux_t *p_demux = p_url->priv_data;
470 int64_t i_absolute = (int64_t)offset;
471 int64_t i_size = stream_Size( p_demux->s );
473 #ifdef AVFORMAT_DEBUG
474 msg_Warn( p_demux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
482 i_absolute = stream_Tell( p_demux->s ) + offset;
485 i_absolute = i_size + offset;
493 if( i_size && i_absolute > i_size )
496 if( stream_Seek( p_demux->s, i_absolute ) )
501 return stream_Tell( p_demux->s );
504 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */