1 /*****************************************************************************
2 * demux.c: demuxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
5 * $Id: demux.c,v 1.3 2004/01/15 19:46:32 gbazin Exp $
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@netcourrier.com>
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>
34 #ifdef HAVE_FFMPEG_AVCODEC_H
35 # include <ffmpeg/avformat.h>
37 # include <avformat.h>
40 /* Version checking */
41 #if (LIBAVFORMAT_BUILD >= 4611) && defined(HAVE_LIBAVFORMAT)
43 /*****************************************************************************
44 * demux_sys_t: demux descriptor
45 *****************************************************************************/
65 /*****************************************************************************
67 *****************************************************************************/
68 static int Demux ( demux_t *p_demux );
69 static int Control( demux_t *p_demux, int i_query, va_list args );
71 static int IORead( void *opaque, uint8_t *buf, int buf_size );
72 static int IOSeek( void *opaque, offset_t offset, int whence );
74 /*****************************************************************************
76 *****************************************************************************/
77 int E_(OpenDemux)( vlc_object_t *p_this )
79 demux_t *p_demux = (demux_t*)p_this;
85 b_forced = ( p_demux->psz_demux && *p_demux->psz_demux &&
86 !strcmp( p_demux->psz_demux, "ffmpeg" ) ) ? 1 : 0;
89 pd.filename = p_demux->psz_path;
90 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
92 msg_Warn( p_demux, "cannot peek" );
96 /* Should we call it only once ? */
100 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
102 msg_Dbg( p_demux, "couldn't guess format" );
106 /* Don't try to handle MPEG unless forced */
108 ( !strcmp( fmt->name, "mpeg" ) ||
109 !strcmp( fmt->name, "vcd" ) ||
110 !strcmp( fmt->name, "vob" ) ||
111 !strcmp( fmt->name, "mpegts" ) ) )
116 /* Fill p_demux fields */
117 p_demux->pf_demux = Demux;
118 p_demux->pf_control = Control;
119 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
123 p_sys->i_pcr_tk = -1;
125 /* Create I/O wrapper */
126 p_sys->io_buffer_size = 32768; /* FIXME */
127 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
128 p_sys->url.priv_data = p_demux;
129 p_sys->url.prot = &p_sys->prot;
130 p_sys->url.prot->name = "VLC I/O wrapper";
131 p_sys->url.prot->url_open = 0;
132 p_sys->url.prot->url_read = IORead;
133 p_sys->url.prot->url_write = 0;
134 p_sys->url.prot->url_seek = IOSeek;
135 p_sys->url.prot->url_close = 0;
136 p_sys->url.prot->next = 0;
137 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
138 0, &p_sys->url, IORead, NULL, IOSeek );
140 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
143 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
146 msg_Err( p_demux, "av_open_input_stream failed" );
150 if( av_find_stream_info( p_sys->ic ) )
152 msg_Err( p_demux, "av_find_stream_info failed" );
156 for( i = 0; i < p_sys->ic->nb_streams; i++ )
158 AVCodecContext *cc = &p_sys->ic->streams[i]->codec;
163 if( !E_(GetVlcFourcc)( cc->codec_id, NULL, &fcc, NULL ) )
164 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
166 switch( cc->codec_type )
168 case CODEC_TYPE_AUDIO:
169 es_format_Init( &fmt, AUDIO_ES, fcc );
170 fmt.audio.i_channels = cc->channels;
171 fmt.audio.i_rate = cc->sample_rate;
172 fmt.audio.i_bitspersample = cc->bits_per_sample;
173 fmt.audio.i_blockalign = cc->block_align;
175 case CODEC_TYPE_VIDEO:
176 es_format_Init( &fmt, VIDEO_ES, fcc );
177 fmt.video.i_width = cc->width;
178 fmt.video.i_height = cc->height;
184 fmt.i_extra = cc->extradata_size;
185 fmt.p_extra = cc->extradata;
186 es = es_out_Add( p_demux->out, &fmt );
188 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
189 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
191 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
194 msg_Dbg( p_demux, "AVFormat supported stream" );
195 msg_Dbg( p_demux, " - format = %s (%s)",
196 p_sys->fmt->name, p_sys->fmt->long_name );
197 msg_Dbg( p_demux, " - start time = "I64Fd,
198 ( p_sys->ic->start_time != AV_NOPTS_VALUE ) ?
199 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
200 msg_Dbg( p_demux, " - duration = "I64Fd,
201 ( p_sys->ic->duration != AV_NOPTS_VALUE ) ?
202 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
207 /*****************************************************************************
209 *****************************************************************************/
210 void E_(CloseDemux)( vlc_object_t *p_this )
212 demux_t *p_demux = (demux_t*)p_this;
213 demux_sys_t *p_sys = p_demux->p_sys;
215 av_close_input_file( p_sys->ic );
217 free( p_sys->io_buffer );
221 /*****************************************************************************
223 *****************************************************************************/
224 static int Demux( demux_t *p_demux )
226 demux_sys_t *p_sys = p_demux->p_sys;
229 int64_t i_start_time;
232 if( av_read_frame( p_sys->ic, &pkt ) )
236 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
238 av_free_packet( &pkt );
241 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
246 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
248 i_start_time = ( p_sys->ic->start_time != AV_NOPTS_VALUE ) ?
249 p_sys->ic->start_time : 0;
251 p_frame->i_dts = ( pkt.dts == AV_NOPTS_VALUE ) ?
252 0 : (pkt.dts - i_start_time) * 1000000 / AV_TIME_BASE;
253 p_frame->i_pts = ( pkt.pts == AV_NOPTS_VALUE ) ?
254 0 : (pkt.pts - i_start_time) * 1000000 / AV_TIME_BASE;
256 msg_Dbg( p_demux, "tk[%d] dts="I64Fd" pts="I64Fd,
257 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
260 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
262 p_sys->i_pcr_tk = pkt.stream_index;
263 p_sys->i_pcr = pkt.dts - i_start_time;
265 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
268 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
269 av_free_packet( &pkt );
273 /*****************************************************************************
275 *****************************************************************************/
276 static int Control( demux_t *p_demux, int i_query, va_list args )
278 demux_sys_t *p_sys = p_demux->p_sys;
284 case DEMUX_GET_POSITION:
285 pf = (double*) va_arg( args, double* );
286 i64 = stream_Size( p_demux->s );
289 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
297 case DEMUX_SET_POSITION:
298 f = (double) va_arg( args, double );
299 i64 = stream_Tell( p_demux->s );
300 if( i64 && p_sys->i_pcr )
302 int64_t i_size = stream_Size( p_demux->s );
304 i64 = p_sys->i_pcr * i_size / i64 * f;
305 if( p_sys->ic->start_time != AV_NOPTS_VALUE )
306 i64 += p_sys->ic->start_time;
308 msg_Warn( p_demux, "DEMUX_SET_POSITION: "I64Fd, i64 );
310 if( av_seek_frame( p_sys->ic, -1, i64 ) )
314 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
315 p_sys->i_pcr = -1; /* Invalidate time display */
320 pi64 = (int64_t*)va_arg( args, int64_t * );
321 *pi64 = p_sys->i_pcr;
325 i64 = (int64_t)va_arg( args, int64_t );
326 if( p_sys->ic->start_time != AV_NOPTS_VALUE )
327 i64 += p_sys->ic->start_time;
329 msg_Warn( p_demux, "DEMUX_SET_TIME: "I64Fd, i64 );
331 if( av_seek_frame( p_sys->ic, -1, i64 ) < 0 )
335 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
336 p_sys->i_pcr = -1; /* Invalidate time display */
344 /*****************************************************************************
345 * I/O wrappers for libavformat
346 *****************************************************************************/
347 static int IORead( void *opaque, uint8_t *buf, int buf_size )
349 URLContext *p_url = opaque;
350 demux_t *p_demux = p_url->priv_data;
351 return stream_Read( p_demux->s, buf, buf_size );
354 static int IOSeek( void *opaque, offset_t offset, int whence )
356 URLContext *p_url = opaque;
357 demux_t *p_demux = p_url->priv_data;
360 msg_Warn( p_demux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
368 i_absolute = stream_Tell( p_demux->s ) + offset;
371 i_absolute = stream_Size( p_demux->s ) - offset;
378 if( stream_Seek( p_demux->s, i_absolute ) )
386 #else /* LIBAVFORMAT_BUILD >= 4611 */
388 int E_(OpenDemux)( vlc_object_t *p_this )
393 void E_(CloseDemux)( vlc_object_t *p_this )
397 #endif /* LIBAVFORMAT_BUILD >= 4611 */