1 /*****************************************************************************
2 * demux.c: demuxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
31 #include <vlc/input.h>
35 #ifdef HAVE_FFMPEG_AVCODEC_H
36 # include <ffmpeg/avformat.h>
38 # include <avformat.h>
43 //#define AVFORMAT_DEBUG 1
45 /* Version checking */
46 #if (LIBAVFORMAT_BUILD >= 4611) && defined(HAVE_LIBAVFORMAT)
48 #if LIBAVFORMAT_BUILD >= 4619
49 # define av_seek_frame(a,b,c) av_seek_frame(a,b,c,AVSEEK_FLAG_BYTE)
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 int 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;
95 pd.filename = p_demux->psz_path;
96 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
98 msg_Warn( p_demux, "cannot peek" );
102 /* Should we call it only once ? */
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 msg_Dbg( p_demux, "detected format: %s", fmt->name );
127 /* Fill p_demux fields */
128 p_demux->pf_demux = Demux;
129 p_demux->pf_control = Control;
130 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
134 p_sys->i_pcr_tk = -1;
136 /* Create I/O wrapper */
137 p_sys->io_buffer_size = 32768; /* FIXME */
138 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
139 p_sys->url.priv_data = p_demux;
140 p_sys->url.prot = &p_sys->prot;
141 p_sys->url.prot->name = "VLC I/O wrapper";
142 p_sys->url.prot->url_open = 0;
143 p_sys->url.prot->url_read =
144 (int (*) (URLContext *, unsigned char *, int))IORead;
145 p_sys->url.prot->url_write = 0;
146 p_sys->url.prot->url_seek =
147 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
148 p_sys->url.prot->url_close = 0;
149 p_sys->url.prot->next = 0;
150 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
151 0, &p_sys->url, IORead, NULL, IOSeek );
153 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
156 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
159 msg_Err( p_demux, "av_open_input_stream failed" );
163 if( av_find_stream_info( p_sys->ic ) )
165 msg_Err( p_demux, "av_find_stream_info failed" );
169 for( i = 0; i < p_sys->ic->nb_streams; i++ )
171 AVCodecContext *cc = &p_sys->ic->streams[i]->codec;
176 if( !E_(GetVlcFourcc)( cc->codec_id, NULL, &fcc, NULL ) )
177 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
179 switch( cc->codec_type )
181 case CODEC_TYPE_AUDIO:
182 es_format_Init( &fmt, AUDIO_ES, fcc );
183 fmt.audio.i_channels = cc->channels;
184 fmt.audio.i_rate = cc->sample_rate;
185 fmt.audio.i_bitspersample = cc->bits_per_sample;
186 fmt.audio.i_blockalign = cc->block_align;
188 case CODEC_TYPE_VIDEO:
189 es_format_Init( &fmt, VIDEO_ES, fcc );
190 fmt.video.i_width = cc->width;
191 fmt.video.i_height = cc->height;
194 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
195 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
202 fmt.i_extra = cc->extradata_size;
203 fmt.p_extra = cc->extradata;
204 es = es_out_Add( p_demux->out, &fmt );
206 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
207 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
209 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
212 msg_Dbg( p_demux, "AVFormat supported stream" );
213 msg_Dbg( p_demux, " - format = %s (%s)",
214 p_sys->fmt->name, p_sys->fmt->long_name );
215 msg_Dbg( p_demux, " - start time = "I64Fd,
216 ( p_sys->ic->start_time != AV_NOPTS_VALUE ) ?
217 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
218 msg_Dbg( p_demux, " - duration = "I64Fd,
219 ( p_sys->ic->duration != AV_NOPTS_VALUE ) ?
220 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
225 /*****************************************************************************
227 *****************************************************************************/
228 void E_(CloseDemux)( vlc_object_t *p_this )
230 demux_t *p_demux = (demux_t*)p_this;
231 demux_sys_t *p_sys = p_demux->p_sys;
233 av_close_input_file( p_sys->ic );
235 free( p_sys->io_buffer );
239 /*****************************************************************************
241 *****************************************************************************/
242 static int Demux( demux_t *p_demux )
244 demux_sys_t *p_sys = p_demux->p_sys;
247 int64_t i_start_time;
250 if( av_read_frame( p_sys->ic, &pkt ) )
254 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
256 av_free_packet( &pkt );
259 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
264 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
266 i_start_time = ( p_sys->ic->start_time != AV_NOPTS_VALUE ) ?
267 p_sys->ic->start_time : 0;
269 p_frame->i_dts = ( pkt.dts == AV_NOPTS_VALUE ) ?
270 0 : (pkt.dts - i_start_time) * 1000000 / AV_TIME_BASE;
271 p_frame->i_pts = ( pkt.pts == AV_NOPTS_VALUE ) ?
272 0 : (pkt.pts - i_start_time) * 1000000 / AV_TIME_BASE;
274 #ifdef AVFORMAT_DEBUG
275 msg_Dbg( p_demux, "tk[%d] dts="I64Fd" pts="I64Fd,
276 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
280 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
282 p_sys->i_pcr_tk = pkt.stream_index;
283 p_sys->i_pcr = pkt.dts - i_start_time;
285 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
288 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
289 av_free_packet( &pkt );
293 /*****************************************************************************
295 *****************************************************************************/
296 static int Control( demux_t *p_demux, int i_query, va_list args )
298 demux_sys_t *p_sys = p_demux->p_sys;
304 case DEMUX_GET_POSITION:
305 pf = (double*) va_arg( args, double* );
306 i64 = stream_Size( p_demux->s );
309 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
317 case DEMUX_SET_POSITION:
318 f = (double) va_arg( args, double );
319 i64 = stream_Tell( p_demux->s );
320 if( i64 && p_sys->i_pcr )
322 int64_t i_size = stream_Size( p_demux->s );
324 i64 = p_sys->i_pcr * i_size / i64 * f;
325 if( p_sys->ic->start_time != AV_NOPTS_VALUE )
326 i64 += p_sys->ic->start_time;
328 msg_Warn( p_demux, "DEMUX_SET_POSITION: "I64Fd, i64 );
330 if( av_seek_frame( p_sys->ic, -1, i64 ) )
334 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
335 p_sys->i_pcr = -1; /* Invalidate time display */
340 pi64 = (int64_t*)va_arg( args, int64_t * );
341 *pi64 = p_sys->i_pcr;
345 i64 = (int64_t)va_arg( args, int64_t );
346 if( p_sys->ic->start_time != AV_NOPTS_VALUE )
347 i64 += p_sys->ic->start_time;
349 msg_Warn( p_demux, "DEMUX_SET_TIME: "I64Fd, i64 );
351 if( av_seek_frame( p_sys->ic, -1, i64 ) < 0 )
355 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
356 p_sys->i_pcr = -1; /* Invalidate time display */
361 vlc_meta_t **pp_meta = (vlc_meta_t**)va_arg( args, vlc_meta_t** );
364 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
365 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
366 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
371 *pp_meta = meta = vlc_meta_New();
373 if( p_sys->ic->title[0] )
374 vlc_meta_Add( meta, VLC_META_TITLE, p_sys->ic->title );
375 if( p_sys->ic->author[0] )
376 vlc_meta_Add( meta, VLC_META_AUTHOR, p_sys->ic->author );
377 if( p_sys->ic->copyright[0] )
378 vlc_meta_Add( meta, VLC_META_COPYRIGHT, p_sys->ic->copyright );
379 if( p_sys->ic->comment[0] )
380 vlc_meta_Add( meta, VLC_META_DESCRIPTION, p_sys->ic->comment );
381 if( p_sys->ic->genre[0] )
382 vlc_meta_Add( meta, VLC_META_GENRE, p_sys->ic->genre );
391 /*****************************************************************************
392 * I/O wrappers for libavformat
393 *****************************************************************************/
394 static int IORead( void *opaque, uint8_t *buf, int buf_size )
396 URLContext *p_url = opaque;
397 demux_t *p_demux = p_url->priv_data;
398 int i_ret = stream_Read( p_demux->s, buf, buf_size );
399 return i_ret ? i_ret : -1;
402 static int IOSeek( void *opaque, offset_t offset, int whence )
404 URLContext *p_url = opaque;
405 demux_t *p_demux = p_url->priv_data;
408 #ifdef AVFORMAT_DEBUG
409 msg_Warn( p_demux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
418 i_absolute = stream_Tell( p_demux->s ) + offset;
421 i_absolute = stream_Size( p_demux->s ) - offset;
428 if( stream_Seek( p_demux->s, i_absolute ) )
436 #else /* LIBAVFORMAT_BUILD >= 4611 */
438 int E_(OpenDemux)( vlc_object_t *p_this )
443 void E_(CloseDemux)( vlc_object_t *p_this )
447 #endif /* LIBAVFORMAT_BUILD >= 4611 */