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@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" ) ||
112 /* libavformat's redirector won't work */
113 !strcmp( fmt->name, "redir" ) ||
114 !strcmp( fmt->name, "sdp" ) ) )
119 msg_Dbg( p_demux, "detected format: %s", fmt->name );
121 /* Fill p_demux fields */
122 p_demux->pf_demux = Demux;
123 p_demux->pf_control = Control;
124 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
128 p_sys->i_pcr_tk = -1;
130 /* Create I/O wrapper */
131 p_sys->io_buffer_size = 32768; /* FIXME */
132 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
133 p_sys->url.priv_data = p_demux;
134 p_sys->url.prot = &p_sys->prot;
135 p_sys->url.prot->name = "VLC I/O wrapper";
136 p_sys->url.prot->url_open = 0;
137 p_sys->url.prot->url_read = IORead;
138 p_sys->url.prot->url_write = 0;
139 p_sys->url.prot->url_seek = IOSeek;
140 p_sys->url.prot->url_close = 0;
141 p_sys->url.prot->next = 0;
142 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
143 0, &p_sys->url, IORead, NULL, IOSeek );
145 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
148 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
151 msg_Err( p_demux, "av_open_input_stream failed" );
155 if( av_find_stream_info( p_sys->ic ) )
157 msg_Err( p_demux, "av_find_stream_info failed" );
161 for( i = 0; i < p_sys->ic->nb_streams; i++ )
163 AVCodecContext *cc = &p_sys->ic->streams[i]->codec;
168 if( !E_(GetVlcFourcc)( cc->codec_id, NULL, &fcc, NULL ) )
169 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
171 switch( cc->codec_type )
173 case CODEC_TYPE_AUDIO:
174 es_format_Init( &fmt, AUDIO_ES, fcc );
175 fmt.audio.i_channels = cc->channels;
176 fmt.audio.i_rate = cc->sample_rate;
177 fmt.audio.i_bitspersample = cc->bits_per_sample;
178 fmt.audio.i_blockalign = cc->block_align;
180 case CODEC_TYPE_VIDEO:
181 es_format_Init( &fmt, VIDEO_ES, fcc );
182 fmt.video.i_width = cc->width;
183 fmt.video.i_height = cc->height;
186 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
187 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
194 fmt.i_extra = cc->extradata_size;
195 fmt.p_extra = cc->extradata;
196 es = es_out_Add( p_demux->out, &fmt );
198 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
199 cc->codec_type == CODEC_TYPE_AUDIO ? "audio" : "video",
201 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
204 msg_Dbg( p_demux, "AVFormat supported stream" );
205 msg_Dbg( p_demux, " - format = %s (%s)",
206 p_sys->fmt->name, p_sys->fmt->long_name );
207 msg_Dbg( p_demux, " - start time = "I64Fd,
208 ( p_sys->ic->start_time != AV_NOPTS_VALUE ) ?
209 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
210 msg_Dbg( p_demux, " - duration = "I64Fd,
211 ( p_sys->ic->duration != AV_NOPTS_VALUE ) ?
212 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
217 /*****************************************************************************
219 *****************************************************************************/
220 void E_(CloseDemux)( vlc_object_t *p_this )
222 demux_t *p_demux = (demux_t*)p_this;
223 demux_sys_t *p_sys = p_demux->p_sys;
225 av_close_input_file( p_sys->ic );
227 free( p_sys->io_buffer );
231 /*****************************************************************************
233 *****************************************************************************/
234 static int Demux( demux_t *p_demux )
236 demux_sys_t *p_sys = p_demux->p_sys;
239 int64_t i_start_time;
242 if( av_read_frame( p_sys->ic, &pkt ) )
246 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
248 av_free_packet( &pkt );
251 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
256 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
258 i_start_time = ( p_sys->ic->start_time != AV_NOPTS_VALUE ) ?
259 p_sys->ic->start_time : 0;
261 p_frame->i_dts = ( pkt.dts == AV_NOPTS_VALUE ) ?
262 0 : (pkt.dts - i_start_time) * 1000000 / AV_TIME_BASE;
263 p_frame->i_pts = ( pkt.pts == AV_NOPTS_VALUE ) ?
264 0 : (pkt.pts - i_start_time) * 1000000 / AV_TIME_BASE;
266 msg_Dbg( p_demux, "tk[%d] dts="I64Fd" pts="I64Fd,
267 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
270 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
272 p_sys->i_pcr_tk = pkt.stream_index;
273 p_sys->i_pcr = pkt.dts - i_start_time;
275 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
278 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
279 av_free_packet( &pkt );
283 /*****************************************************************************
285 *****************************************************************************/
286 static int Control( demux_t *p_demux, int i_query, va_list args )
288 demux_sys_t *p_sys = p_demux->p_sys;
294 case DEMUX_GET_POSITION:
295 pf = (double*) va_arg( args, double* );
296 i64 = stream_Size( p_demux->s );
299 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
307 case DEMUX_SET_POSITION:
308 f = (double) va_arg( args, double );
309 i64 = stream_Tell( p_demux->s );
310 if( i64 && p_sys->i_pcr )
312 int64_t i_size = stream_Size( p_demux->s );
314 i64 = p_sys->i_pcr * i_size / i64 * f;
315 if( p_sys->ic->start_time != AV_NOPTS_VALUE )
316 i64 += p_sys->ic->start_time;
318 msg_Warn( p_demux, "DEMUX_SET_POSITION: "I64Fd, i64 );
320 if( av_seek_frame( p_sys->ic, -1, i64 ) )
324 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
325 p_sys->i_pcr = -1; /* Invalidate time display */
330 pi64 = (int64_t*)va_arg( args, int64_t * );
331 *pi64 = p_sys->i_pcr;
335 i64 = (int64_t)va_arg( args, int64_t );
336 if( p_sys->ic->start_time != AV_NOPTS_VALUE )
337 i64 += p_sys->ic->start_time;
339 msg_Warn( p_demux, "DEMUX_SET_TIME: "I64Fd, i64 );
341 if( av_seek_frame( p_sys->ic, -1, i64 ) < 0 )
345 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
346 p_sys->i_pcr = -1; /* Invalidate time display */
354 /*****************************************************************************
355 * I/O wrappers for libavformat
356 *****************************************************************************/
357 static int IORead( void *opaque, uint8_t *buf, int buf_size )
359 URLContext *p_url = opaque;
360 demux_t *p_demux = p_url->priv_data;
361 return stream_Read( p_demux->s, buf, buf_size );
364 static int IOSeek( void *opaque, offset_t offset, int whence )
366 URLContext *p_url = opaque;
367 demux_t *p_demux = p_url->priv_data;
370 msg_Warn( p_demux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
378 i_absolute = stream_Tell( p_demux->s ) + offset;
381 i_absolute = stream_Size( p_demux->s ) - offset;
388 if( stream_Seek( p_demux->s, i_absolute ) )
396 #else /* LIBAVFORMAT_BUILD >= 4611 */
398 int E_(OpenDemux)( vlc_object_t *p_this )
403 void E_(CloseDemux)( vlc_object_t *p_this )
407 #endif /* LIBAVFORMAT_BUILD >= 4611 */