1 /*****************************************************************************
2 * demux.c: demuxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
5 * $Id: demux.c,v 1.1 2004/01/08 00:12:50 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 *****************************************************************************/
63 /*****************************************************************************
65 *****************************************************************************/
66 static int Demux ( demux_t *p_demux );
67 static int Control( demux_t *p_demux, int i_query, va_list args );
69 static int IORead( void *opaque, uint8_t *buf, int buf_size );
70 static int IOSeek( void *opaque, offset_t offset, int whence );
72 /*****************************************************************************
74 *****************************************************************************/
75 int E_(OpenDemux)( vlc_object_t *p_this )
77 demux_t *p_demux = (demux_t*)p_this;
83 b_forced = ( p_demux->psz_demux && *p_demux->psz_demux &&
84 !strcmp( p_demux->psz_demux, "ffmpeg" ) ) ? 1 : 0;
87 pd.filename = p_demux->psz_path;
88 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
90 msg_Warn( p_demux, "cannot peek" );
94 /* Should we call it only once ? */
98 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
100 msg_Dbg( p_demux, "couldn't guess format" );
104 /* Don't try to handle MPEG unless forced */
106 ( !strcmp( fmt->name, "mpeg" ) ||
107 !strcmp( fmt->name, "vcd" ) ||
108 !strcmp( fmt->name, "vob" ) ||
109 !strcmp( fmt->name, "mpegts" ) ) )
114 /* Fill p_demux fields */
115 p_demux->pf_demux = Demux;
116 p_demux->pf_control = Control;
117 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
121 p_sys->i_pcr_tk = -1;
123 /* Create I/O wrapper */
124 p_sys->io_buffer_size = 32768; /* FIXME */
125 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
126 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
127 0, p_demux, IORead, NULL, IOSeek );
129 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
132 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
135 msg_Err( p_demux, "av_open_input_stream failed" );
139 if( av_find_stream_info( p_sys->ic ) )
141 msg_Err( p_demux, "av_find_stream_info failed" );
145 for( i = 0; i < p_sys->ic->nb_streams; i++ )
147 AVCodecContext *cc = &p_sys->ic->streams[i]->codec;
152 if( !E_(GetVlcFourcc)( cc->codec_id, NULL, &fcc, NULL ) )
153 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
155 switch( cc->codec_type )
157 case CODEC_TYPE_AUDIO:
158 es_format_Init( &fmt, AUDIO_ES, fcc );
160 case CODEC_TYPE_VIDEO:
161 es_format_Init( &fmt, VIDEO_ES, fcc );
167 fmt.video.i_width = cc->width;
168 fmt.video.i_height = cc->height;
169 fmt.i_extra = cc->extradata_size;
170 fmt.p_extra = cc->extradata;
171 es = es_out_Add( p_demux->out, &fmt );
173 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
174 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
176 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
179 msg_Dbg( p_demux, "AVFormat supported stream" );
180 msg_Dbg( p_demux, " - format = %s (%s)",
181 p_sys->fmt->name, p_sys->fmt->long_name );
182 msg_Dbg( p_demux, " - start time=%lld",
183 p_sys->ic->start_time / AV_TIME_BASE );
184 msg_Dbg( p_demux, " - duration = %lld",
185 p_sys->ic->duration / AV_TIME_BASE );
190 /*****************************************************************************
192 *****************************************************************************/
193 void E_(CloseDemux)( vlc_object_t *p_this )
195 demux_t *p_demux = (demux_t*)p_this;
196 demux_sys_t *p_sys = p_demux->p_sys;
198 av_close_input_file( p_sys->ic );
200 free( p_sys->io_buffer );
204 /*****************************************************************************
206 *****************************************************************************/
207 static int Demux( demux_t *p_demux )
209 demux_sys_t *p_sys = p_demux->p_sys;
214 if( av_read_frame( p_sys->ic, &pkt ) )
218 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
220 av_free_packet( &pkt );
223 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
228 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
229 p_frame->i_dts = pkt.dts * 1000000 / AV_TIME_BASE;
230 p_frame->i_pts = pkt.pts * 1000000 / AV_TIME_BASE;
231 msg_Dbg( p_demux, "tk[%d] dts=%lld pts=%lld",
232 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
235 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
237 p_sys->i_pcr_tk = pkt.stream_index;
238 p_sys->i_pcr = pkt.dts;
240 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
243 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
244 av_free_packet( &pkt );
248 /*****************************************************************************
250 *****************************************************************************/
251 static int Control( demux_t *p_demux, int i_query, va_list args )
253 demux_sys_t *p_sys = p_demux->p_sys;
259 case DEMUX_GET_POSITION:
260 pf = (double*) va_arg( args, double* );
261 i64 = stream_Size( p_demux->s );
264 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
272 case DEMUX_SET_POSITION:
273 f = (double) va_arg( args, double );
274 i64 = stream_Size( p_demux->s );
276 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
277 av_seek_frame( p_sys->ic, -1, -1 );
278 if( stream_Seek( p_demux->s, (int64_t)(i64 * f) ) )
282 p_sys->i_pcr = -1; /* Invalidate time display */
286 pi64 = (int64_t*)va_arg( args, int64_t * );
287 *pi64 = p_sys->i_pcr;
291 i64 = (int64_t)va_arg( args, int64_t );
292 if( av_seek_frame( p_sys->ic, -1, i64 ) < 0 )
296 p_sys->i_pcr = -1; /* Invalidate time display */
304 /*****************************************************************************
305 * I/O wrappers for libavformat
306 *****************************************************************************/
307 static int IORead( void *opaque, uint8_t *buf, int buf_size )
309 demux_t *p_demux = opaque;
310 return stream_Read( p_demux->s, buf, buf_size );
313 static int IOSeek( void *opaque, offset_t offset, int whence )
315 demux_t *p_demux = opaque;
324 i_absolute = stream_Tell( p_demux->s ) + offset;
327 i_absolute = stream_Size( p_demux->s ) - offset;
334 if( stream_Seek( p_demux->s, i_absolute ) )
342 #else /* LIBAVFORMAT_BUILD >= 4611 */
344 int E_(OpenDemux)( vlc_object_t *p_this )
349 void E_(CloseDemux)( vlc_object_t *p_this )
353 #endif /* LIBAVFORMAT_BUILD >= 4611 */