1 /*****************************************************************************
2 * demux.c: demuxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2004 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 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
31 #include <vlc_demux.h>
32 #include <vlc_stream.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;
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 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
172 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
175 msg_Err( p_demux, "av_open_input_stream failed" );
176 E_(CloseDemux)( p_this );
180 if( av_find_stream_info( p_sys->ic ) < 0 )
182 msg_Err( p_demux, "av_find_stream_info failed" );
183 E_(CloseDemux)( p_this );
187 for( i = 0; i < p_sys->ic->nb_streams; i++ )
189 AVCodecContext *cc = p_sys->ic->streams[i]->codec;
194 if( !E_(GetVlcFourcc)( cc->codec_id, NULL, &fcc, NULL ) )
196 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
198 /* Special case for raw video data */
199 if( cc->codec_id == CODEC_ID_RAWVIDEO )
201 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
202 fcc = E_(GetVlcChroma)( cc->pix_fmt );
206 switch( cc->codec_type )
208 case CODEC_TYPE_AUDIO:
209 es_format_Init( &fmt, AUDIO_ES, fcc );
210 fmt.audio.i_channels = cc->channels;
211 fmt.audio.i_rate = cc->sample_rate;
212 fmt.audio.i_bitspersample = cc->bits_per_sample;
213 fmt.audio.i_blockalign = cc->block_align;
215 case CODEC_TYPE_VIDEO:
216 es_format_Init( &fmt, VIDEO_ES, fcc );
217 fmt.video.i_width = cc->width;
218 fmt.video.i_height = cc->height;
221 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
222 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
225 case CODEC_TYPE_SUBTITLE:
226 es_format_Init( &fmt, SPU_ES, fcc );
229 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
233 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
234 fmt.i_extra = cc->extradata_size;
235 fmt.p_extra = cc->extradata;
236 es = es_out_Add( p_demux->out, &fmt );
238 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
239 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
241 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
244 msg_Dbg( p_demux, "AVFormat supported stream" );
245 msg_Dbg( p_demux, " - format = %s (%s)",
246 p_sys->fmt->name, p_sys->fmt->long_name );
247 msg_Dbg( p_demux, " - start time = "I64Fd,
248 ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
249 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
250 msg_Dbg( p_demux, " - duration = "I64Fd,
251 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
252 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
257 /*****************************************************************************
259 *****************************************************************************/
260 void E_(CloseDemux)( vlc_object_t *p_this )
262 demux_t *p_demux = (demux_t*)p_this;
263 demux_sys_t *p_sys = p_demux->p_sys;
265 FREENULL( p_sys->tk );
266 if( p_sys->ic ) av_close_input_file( p_sys->ic );
267 if( p_sys->io_buffer ) free( p_sys->io_buffer );
271 /*****************************************************************************
273 *****************************************************************************/
274 static int Demux( demux_t *p_demux )
276 demux_sys_t *p_sys = p_demux->p_sys;
279 int64_t i_start_time;
282 if( av_read_frame( p_sys->ic, &pkt ) )
286 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
288 av_free_packet( &pkt );
291 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
296 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
298 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
299 p_sys->ic->start_time : 0;
301 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
302 0 : (pkt.dts - i_start_time) * 1000000 *
303 p_sys->ic->streams[pkt.stream_index]->time_base.num /
304 p_sys->ic->streams[pkt.stream_index]->time_base.den;
305 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
306 0 : (pkt.pts - i_start_time) * 1000000 *
307 p_sys->ic->streams[pkt.stream_index]->time_base.num /
308 p_sys->ic->streams[pkt.stream_index]->time_base.den;
310 #ifdef AVFORMAT_DEBUG
311 msg_Dbg( p_demux, "tk[%d] dts="I64Fd" pts="I64Fd,
312 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
316 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
318 p_sys->i_pcr_tk = pkt.stream_index;
319 p_sys->i_pcr = p_frame->i_dts;
321 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
324 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
325 av_free_packet( &pkt );
329 /*****************************************************************************
331 *****************************************************************************/
332 static int Control( demux_t *p_demux, int i_query, va_list args )
334 demux_sys_t *p_sys = p_demux->p_sys;
340 case DEMUX_GET_POSITION:
341 pf = (double*) va_arg( args, double* ); *pf = 0.0;
342 i64 = stream_Size( p_demux->s );
345 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
348 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
350 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
355 case DEMUX_SET_POSITION:
356 f = (double) va_arg( args, double );
357 i64 = stream_Tell( p_demux->s );
358 if( p_sys->i_pcr > 0 )
360 i64 = p_sys->ic->duration * f;
361 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
362 i64 += p_sys->ic->start_time;
364 msg_Warn( p_demux, "DEMUX_SET_POSITION: "I64Fd, i64 );
366 /* If we have a duration, we prefer to seek by time
367 but if we don't, or if the seek fails, try BYTE seeking */
368 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
369 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
371 int64_t i_size = stream_Size( p_demux->s );
372 i64 = (int64_t)i_size * f;
374 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: "I64Fd, i64 );
375 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
378 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
379 p_sys->i_pcr = -1; /* Invalidate time display */
383 case DEMUX_GET_LENGTH:
384 pi64 = (int64_t*)va_arg( args, int64_t * );
385 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
387 *pi64 = p_sys->ic->duration;
393 pi64 = (int64_t*)va_arg( args, int64_t * );
394 *pi64 = p_sys->i_pcr;
398 i64 = (int64_t)va_arg( args, int64_t );
399 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
400 i64 += p_sys->ic->start_time;
402 msg_Warn( p_demux, "DEMUX_SET_TIME: "I64Fd, i64 );
404 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
408 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
409 p_sys->i_pcr = -1; /* Invalidate time display */
414 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
416 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
417 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
418 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
423 if( p_sys->ic->title[0] )
424 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
425 if( p_sys->ic->author[0] )
426 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
427 if( p_sys->ic->copyright[0] )
428 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
429 if( p_sys->ic->comment[0] )
430 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
431 if( p_sys->ic->genre[0] )
432 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
441 /*****************************************************************************
442 * I/O wrappers for libavformat
443 *****************************************************************************/
444 static int IORead( void *opaque, uint8_t *buf, int buf_size )
446 URLContext *p_url = opaque;
447 demux_t *p_demux = p_url->priv_data;
448 int i_ret = stream_Read( p_demux->s, buf, buf_size );
449 return i_ret ? i_ret : -1;
452 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
454 URLContext *p_url = opaque;
455 demux_t *p_demux = p_url->priv_data;
456 int64_t i_absolute = (int64_t)offset;
457 int64_t i_size = stream_Size( p_demux->s );
459 #ifdef AVFORMAT_DEBUG
460 msg_Warn( p_demux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
468 i_absolute = stream_Tell( p_demux->s ) + offset;
471 i_absolute = i_size + offset;
479 if( i_size && i_absolute > i_size )
482 if( stream_Seek( p_demux->s, i_absolute ) )
487 return stream_Tell( p_demux->s );
490 #else /* HAVE_FFMPEG_AVFORMAT_H */
492 int E_(OpenDemux)( vlc_object_t *p_this )
497 void E_(CloseDemux)( vlc_object_t *p_this )
501 #endif /* HAVE_FFMPEG_AVFORMAT_H */