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 ) )
211 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
213 /* Special case for raw video data */
214 if( cc->codec_id == CODEC_ID_RAWVIDEO )
216 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
217 fcc = GetVlcChroma( cc->pix_fmt );
221 switch( cc->codec_type )
223 case CODEC_TYPE_AUDIO:
224 es_format_Init( &fmt, AUDIO_ES, fcc );
225 fmt.audio.i_channels = cc->channels;
226 fmt.audio.i_rate = cc->sample_rate;
227 fmt.audio.i_bitspersample = cc->bits_per_sample;
228 fmt.audio.i_blockalign = cc->block_align;
231 case CODEC_TYPE_VIDEO:
232 es_format_Init( &fmt, VIDEO_ES, fcc );
233 fmt.video.i_width = cc->width;
234 fmt.video.i_height = cc->height;
237 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
238 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
242 case CODEC_TYPE_SUBTITLE:
243 es_format_Init( &fmt, SPU_ES, fcc );
244 psz_type = "subtitle";
248 es_format_Init( &fmt, UNKNOWN_ES, 0 );
249 if( cc->codec_type == CODEC_TYPE_DATA )
251 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
252 else if( cc->codec_type == CODEC_TYPE_ATTACHMENT )
253 psz_type = "attachment";
255 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
259 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
260 fmt.i_extra = cc->extradata_size;
261 fmt.p_extra = cc->extradata;
262 es = es_out_Add( p_demux->out, &fmt );
264 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
265 psz_type, (char*)&fcc );
266 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
269 msg_Dbg( p_demux, "AVFormat supported stream" );
270 msg_Dbg( p_demux, " - format = %s (%s)",
271 p_sys->fmt->name, p_sys->fmt->long_name );
272 msg_Dbg( p_demux, " - start time = %"PRId64,
273 ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
274 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
275 msg_Dbg( p_demux, " - duration = %"PRId64,
276 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
277 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
282 /*****************************************************************************
284 *****************************************************************************/
285 void CloseDemux( vlc_object_t *p_this )
287 demux_t *p_demux = (demux_t*)p_this;
288 demux_sys_t *p_sys = p_demux->p_sys;
291 FREENULL( p_sys->tk );
293 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
294 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
295 if( p_sys->ic ) av_close_input_file( p_sys->ic );
296 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
298 free( p_sys->io_buffer );
302 /*****************************************************************************
304 *****************************************************************************/
305 static int Demux( demux_t *p_demux )
307 demux_sys_t *p_sys = p_demux->p_sys;
310 int64_t i_start_time;
313 if( av_read_frame( p_sys->ic, &pkt ) )
317 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
319 av_free_packet( &pkt );
322 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
327 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
329 if( pkt.flags & PKT_FLAG_KEY )
330 p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
332 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
333 ( p_sys->ic->start_time * 1000000 / AV_TIME_BASE ) : 0;
335 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
336 0 : (pkt.dts) * 1000000 *
337 p_sys->ic->streams[pkt.stream_index]->time_base.num /
338 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
339 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
340 0 : (pkt.pts) * 1000000 *
341 p_sys->ic->streams[pkt.stream_index]->time_base.num /
342 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
344 #ifdef AVFORMAT_DEBUG
345 msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
346 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
350 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
352 p_sys->i_pcr_tk = pkt.stream_index;
353 p_sys->i_pcr = p_frame->i_dts;
355 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
358 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
359 av_free_packet( &pkt );
363 /*****************************************************************************
365 *****************************************************************************/
366 static int Control( demux_t *p_demux, int i_query, va_list args )
368 demux_sys_t *p_sys = p_demux->p_sys;
374 case DEMUX_GET_POSITION:
375 pf = (double*) va_arg( args, double* ); *pf = 0.0;
376 i64 = stream_Size( p_demux->s );
379 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
382 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
384 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
389 case DEMUX_SET_POSITION:
390 f = (double) va_arg( args, double );
391 i64 = stream_Tell( p_demux->s );
392 if( p_sys->i_pcr > 0 )
394 i64 = p_sys->ic->duration * f;
395 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
396 i64 += p_sys->ic->start_time;
398 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
400 /* If we have a duration, we prefer to seek by time
401 but if we don't, or if the seek fails, try BYTE seeking */
402 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
403 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
405 int64_t i_size = stream_Size( p_demux->s );
406 i64 = (int64_t)i_size * f;
408 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
409 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
412 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
413 p_sys->i_pcr = -1; /* Invalidate time display */
417 case DEMUX_GET_LENGTH:
418 pi64 = (int64_t*)va_arg( args, int64_t * );
419 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
421 *pi64 = p_sys->ic->duration;
427 pi64 = (int64_t*)va_arg( args, int64_t * );
428 *pi64 = p_sys->i_pcr;
432 i64 = (int64_t)va_arg( args, int64_t );
433 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
434 i64 += p_sys->ic->start_time;
436 msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
438 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
442 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
443 p_sys->i_pcr = -1; /* Invalidate time display */
448 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
450 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
451 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
452 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
457 if( p_sys->ic->title[0] )
458 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
459 if( p_sys->ic->author[0] )
460 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
461 if( p_sys->ic->copyright[0] )
462 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
463 if( p_sys->ic->comment[0] )
464 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
465 if( p_sys->ic->genre[0] )
466 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
475 /*****************************************************************************
476 * I/O wrappers for libavformat
477 *****************************************************************************/
478 static int IORead( void *opaque, uint8_t *buf, int buf_size )
480 URLContext *p_url = opaque;
481 demux_t *p_demux = p_url->priv_data;
482 int i_ret = stream_Read( p_demux->s, buf, buf_size );
483 return i_ret ? i_ret : -1;
486 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
488 URLContext *p_url = opaque;
489 demux_t *p_demux = p_url->priv_data;
490 int64_t i_absolute = (int64_t)offset;
491 int64_t i_size = stream_Size( p_demux->s );
493 #ifdef AVFORMAT_DEBUG
494 msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
506 i_absolute = stream_Tell( p_demux->s ) + offset;
509 i_absolute = i_size + offset;
519 if( i_absolute > i_size )
521 if( stream_Tell( p_demux->s ) >= i_size )
523 msg_Err( p_demux, "Seeking too far : EOF?" );
528 if( stream_Seek( p_demux->s, i_absolute ) )
533 return stream_Tell( p_demux->s );
536 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */