1 /*****************************************************************************
2 * mux.c: muxer using libavformat
3 *****************************************************************************
4 * Copyright (C) 2006 the VideoLAN team
7 * Authors: Gildas Bazin <gbazin@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_block.h>
36 #include <libavformat/avformat.h>
39 #include "../../codec/avcodec/avcodec.h"
40 #include "../../codec/avcodec/avcommon.h"
42 /* Support for deprecated APIs */
43 #if LIBAVFORMAT_VERSION_INT < ((52<<16)+(105<<8)+0)
44 # define avio_flush put_flush_packet
47 //#define AVFORMAT_DEBUG 1
49 static const char *const ppsz_mux_options[] = {
50 "mux", "options", NULL
53 /*****************************************************************************
54 * mux_sys_t: mux descriptor
55 *****************************************************************************/
58 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(105<<8)+0)
71 int64_t i_initial_dts;
74 /*****************************************************************************
76 *****************************************************************************/
77 static int Control ( sout_mux_t *, int, va_list );
78 static int AddStream( sout_mux_t *, sout_input_t * );
79 static int DelStream( sout_mux_t *, sout_input_t * );
80 static int Mux ( sout_mux_t * );
82 static int IOWrite( void *opaque, uint8_t *buf, int buf_size );
83 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
85 /*****************************************************************************
87 *****************************************************************************/
88 int OpenMux( vlc_object_t *p_this )
90 AVOutputFormat *file_oformat;
91 sout_mux_t *p_mux = (sout_mux_t*)p_this;
92 sout_mux_sys_t *p_sys;
97 config_ChainParse( p_mux, "sout-avformat-", ppsz_mux_options, p_mux->p_cfg );
99 /* Find the requested muxer */
100 psz_mux = var_GetNonEmptyString( p_mux, "sout-avformat-mux" );
103 #if( LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT( 52, 45, 0 ) )
104 file_oformat = av_guess_format( psz_mux, NULL, NULL );
106 file_oformat = guess_format( psz_mux, NULL, NULL );
113 #if( LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT( 52, 45, 0 ) )
114 av_guess_format( NULL, p_mux->p_access->psz_path, NULL);
116 guess_format( NULL, p_mux->p_access->psz_path, NULL);
121 msg_Err( p_mux, "unable for find a suitable output format" );
125 /* Fill p_mux fields */
126 p_mux->pf_control = Control;
127 p_mux->pf_addstream = AddStream;
128 p_mux->pf_delstream = DelStream;
130 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
134 p_sys->oc = avformat_alloc_context();
135 p_sys->oc->oformat = file_oformat;
136 /* If we use dummy access, let avformat write output */
137 if( !strcmp( p_mux->p_access->psz_access, "dummy") )
138 strcpy( p_sys->oc->filename, p_mux->p_access->psz_path );
140 /* Create I/O wrapper */
141 p_sys->io_buffer_size = 32768; /* FIXME */
142 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
144 #if (LIBAVFORMAT_VERSION_INT >= ((52<<16)+(105<<8)+0))
145 p_sys->io = avio_alloc_context(
147 init_put_byte( &p_sys->io,
149 p_sys->io_buffer, p_sys->io_buffer_size,
150 1, p_mux, NULL, IOWrite, IOSeek );
153 #if (LIBAVFORMAT_VERSION_INT < ((52<<16)+(105<<8)+0))
154 AVFormatParameters params, *ap = ¶ms;
155 memset( ap, 0, sizeof(*ap) );
156 if( av_set_parameters( p_sys->oc, ap ) < 0 )
158 msg_Err( p_mux, "invalid encoding parameters" );
159 av_free( p_sys->oc );
160 free( p_sys->io_buffer );
166 #if (LIBAVFORMAT_VERSION_INT >= ((52<<16)+(105<<8)+0))
167 p_sys->oc->pb = p_sys->io;
169 p_sys->oc->pb = &p_sys->io;
171 p_sys->oc->nb_streams = 0;
173 p_sys->b_write_header = true;
174 p_sys->b_error = false;
175 p_sys->i_initial_dts = 0;
180 /*****************************************************************************
182 *****************************************************************************/
183 void CloseMux( vlc_object_t *p_this )
185 sout_mux_t *p_mux = (sout_mux_t*)p_this;
186 sout_mux_sys_t *p_sys = p_mux->p_sys;
188 if( !p_sys->b_write_header && !p_sys->b_error && av_write_trailer( p_sys->oc ) < 0 )
190 msg_Err( p_mux, "could not write trailer" );
193 #if( LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT( 52, 96, 0 ) )
194 avformat_free_context(p_sys->oc);
196 for( unsigned i = 0 ; i < p_sys->oc->nb_streams; i++ )
198 av_free( p_sys->oc->streams[i]->codec->extradata );
199 av_free( p_sys->oc->streams[i]->codec );
200 #if( LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT( 52, 81, 0 ) )
201 av_free( p_sys->oc->streams[i]->info );
203 av_free( p_sys->oc->streams[i] );
205 av_free( p_sys->oc->streams );
206 av_free( p_sys->oc );
209 free( p_sys->io_buffer );
213 /*****************************************************************************
215 *****************************************************************************/
216 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
218 sout_mux_sys_t *p_sys = p_mux->p_sys;
219 AVCodecContext *codec;
223 msg_Dbg( p_mux, "adding input" );
225 if( !GetFfmpegCodec( p_input->p_fmt->i_codec, 0, &i_codec_id, 0 ) )
227 msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
228 (char *)&p_input->p_fmt->i_codec );
232 p_input->p_sys = malloc( sizeof( int ) );
233 *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
235 if( p_input->p_fmt->i_cat != VIDEO_ES && p_input->p_fmt->i_cat != AUDIO_ES)
237 msg_Warn( p_mux, "Unhandled ES category" );
241 #if (LIBAVFORMAT_VERSION_INT >= ((53<<16)+(10<<8)+0))
242 stream = avformat_new_stream( p_sys->oc, NULL);
244 stream = av_new_stream( p_sys->oc, p_sys->oc->nb_streams);
248 free( p_input->p_sys );
251 codec = stream->codec;
253 codec->opaque = p_mux;
255 switch( p_input->p_fmt->i_cat )
258 codec->codec_type = AVMEDIA_TYPE_AUDIO;
259 codec->channels = p_input->p_fmt->audio.i_channels;
260 codec->sample_rate = p_input->p_fmt->audio.i_rate;
261 codec->time_base = (AVRational){1, codec->sample_rate};
262 codec->frame_size = p_input->p_fmt->audio.i_frame_length;
266 if( !p_input->p_fmt->video.i_frame_rate ||
267 !p_input->p_fmt->video.i_frame_rate_base )
269 msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
270 p_input->p_fmt->video.i_frame_rate = 25;
271 p_input->p_fmt->video.i_frame_rate_base = 1;
273 codec->codec_type = AVMEDIA_TYPE_VIDEO;
274 codec->width = p_input->p_fmt->video.i_width;
275 codec->height = p_input->p_fmt->video.i_height;
276 av_reduce( &codec->sample_aspect_ratio.num,
277 &codec->sample_aspect_ratio.den,
278 p_input->p_fmt->video.i_sar_num,
279 p_input->p_fmt->video.i_sar_den, 1 << 30 /* something big */ );
280 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
281 stream->sample_aspect_ratio.num = codec->sample_aspect_ratio.num;
282 stream->sample_aspect_ratio.den = codec->sample_aspect_ratio.den;
284 codec->time_base.den = p_input->p_fmt->video.i_frame_rate;
285 codec->time_base.num = p_input->p_fmt->video.i_frame_rate_base;
290 codec->bit_rate = p_input->p_fmt->i_bitrate;
291 #if LIBAVFORMAT_VERSION_INT >= ((51<<16)+(8<<8)+0)
292 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
293 if( !codec->codec_tag && i_codec_id == CODEC_ID_MP2 )
295 i_codec_id = CODEC_ID_MP3;
296 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
299 # warning "WARNING!!!!!!!"
300 # warning "Using libavformat muxing with versions older than 51.8.0 (r7593) might produce broken files."
302 if( i_codec_id == CODEC_ID_MP2 )
303 i_codec_id = CODEC_ID_MP3;
304 codec->codec_tag = p_input->p_fmt->i_original_fourcc ?: p_input->p_fmt->i_codec;
306 codec->codec_id = i_codec_id;
308 if( p_input->p_fmt->i_extra )
310 codec->extradata_size = p_input->p_fmt->i_extra;
311 codec->extradata = av_malloc( p_input->p_fmt->i_extra );
312 memcpy( codec->extradata, p_input->p_fmt->p_extra,
313 p_input->p_fmt->i_extra );
319 /*****************************************************************************
321 *****************************************************************************/
322 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
324 msg_Dbg( p_mux, "removing input" );
325 free( p_input->p_sys );
329 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
331 sout_mux_sys_t *p_sys = p_mux->p_sys;
332 block_t *p_data = block_FifoGet( p_input->p_fifo );
333 int i_stream = *((int *)p_input->p_sys);
334 AVStream *p_stream = p_sys->oc->streams[i_stream];
337 memset( &pkt, 0, sizeof(AVPacket) );
339 av_init_packet(&pkt);
340 pkt.data = p_data->p_buffer;
341 pkt.size = p_data->i_buffer;
342 pkt.stream_index = i_stream;
344 if( p_data->i_flags & BLOCK_FLAG_TYPE_I ) pkt.flags |= AV_PKT_FLAG_KEY;
346 /* avformat expects pts/dts which start from 0 */
347 p_data->i_dts -= p_mux->p_sys->i_initial_dts;
348 p_data->i_pts -= p_mux->p_sys->i_initial_dts;
350 if( p_data->i_pts > 0 )
351 pkt.pts = p_data->i_pts * p_stream->time_base.den /
352 INT64_C(1000000) / p_stream->time_base.num;
353 if( p_data->i_dts > 0 )
354 pkt.dts = p_data->i_dts * p_stream->time_base.den /
355 INT64_C(1000000) / p_stream->time_base.num;
357 /* this is another hack to prevent libavformat from triggering the "non monotone timestamps" check in avformat/utils.c */
358 p_stream->cur_dts = ( p_data->i_dts * p_stream->time_base.den /
359 INT64_C(1000000) / p_stream->time_base.num ) - 1;
361 if( av_write_frame( p_sys->oc, &pkt ) < 0 )
363 msg_Err( p_mux, "could not write frame (pts: %"PRId64", dts: %"PRId64") "
364 "(pkt pts: %"PRId64", dts: %"PRId64")",
365 p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
366 block_Release( p_data );
370 block_Release( p_data );
374 /*****************************************************************************
375 * Mux: multiplex available data in input fifos
376 *****************************************************************************/
377 static int Mux( sout_mux_t *p_mux )
379 sout_mux_sys_t *p_sys = p_mux->p_sys;
381 if( p_sys->b_error ) return VLC_EGENERIC;
383 if( p_sys->b_write_header )
386 msg_Dbg( p_mux, "writing header" );
388 #if (LIBAVFORMAT_VERSION_INT >= ((53<<16)+(2<<8)+0))
389 char *psz_opts = var_GetNonEmptyString( p_mux, "sout-avformat-options" );
390 AVDictionary *options = NULL;
391 if (psz_opts && *psz_opts)
392 options = vlc_av_get_options(psz_opts);
394 error = avformat_write_header( p_sys->oc, options ? &options : NULL);
395 AVDictionaryEntry *t = NULL;
396 while ((t = av_dict_get(options, "", t, AV_DICT_IGNORE_SUFFIX))) {
397 msg_Err( p_mux, "Unknown option \"%s\"", t->key );
399 av_dict_free(&options);
401 error = av_write_header( p_sys->oc );
405 errno = AVUNERROR(error);
406 msg_Err( p_mux, "could not write header: %m" );
407 p_sys->b_write_header = false;
408 p_sys->b_error = true;
412 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
413 avio_flush( p_sys->oc->pb );
415 avio_flush( &p_sys->oc->pb );
417 p_sys->b_write_header = false;
424 int i_stream = sout_MuxGetStream( p_mux, 1, &i_dts );
428 if( !p_mux->p_sys->i_initial_dts )
429 p_mux->p_sys->i_initial_dts = i_dts;
431 MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
437 /*****************************************************************************
439 *****************************************************************************/
440 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
446 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
447 pb_bool = (bool*)va_arg( args, bool * );
451 case MUX_GET_ADD_STREAM_WAIT:
452 pb_bool = (bool*)va_arg( args, bool * );
458 char **ppsz = (char**)va_arg( args, char ** );
459 *ppsz = strdup( p_mux->p_sys->oc->oformat->mime_type );
468 /*****************************************************************************
469 * I/O wrappers for libavformat
470 *****************************************************************************/
471 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
473 sout_mux_t *p_mux = opaque;
476 #ifdef AVFORMAT_DEBUG
477 msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
480 block_t *p_buf = block_New( p_mux->p_sout, buf_size );
481 if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
483 if( p_mux->p_sys->b_write_header )
484 p_buf->i_flags |= BLOCK_FLAG_HEADER;
486 i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
487 return i_ret ? i_ret : -1;
490 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
492 sout_mux_t *p_mux = opaque;
494 #ifdef AVFORMAT_DEBUG
495 msg_Dbg( p_mux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
501 return sout_AccessOutSeek( p_mux->p_access, offset );