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/avutil.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[] = {
53 /*****************************************************************************
54 * mux_sys_t: mux descriptor
55 *****************************************************************************/
67 int64_t i_initial_dts;
70 /*****************************************************************************
72 *****************************************************************************/
73 static int Control ( sout_mux_t *, int, va_list );
74 static int AddStream( sout_mux_t *, sout_input_t * );
75 static int DelStream( sout_mux_t *, sout_input_t * );
76 static int Mux ( sout_mux_t * );
78 static int IOWrite( void *opaque, uint8_t *buf, int buf_size );
79 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
81 /*****************************************************************************
83 *****************************************************************************/
84 int OpenMux( vlc_object_t *p_this )
86 AVOutputFormat *file_oformat;
87 sout_mux_t *p_mux = (sout_mux_t*)p_this;
88 sout_mux_sys_t *p_sys;
89 AVFormatParameters params, *ap = ¶ms;
92 /* Should we call it only once ? */
94 av_log_set_callback( LibavutilCallback );
96 config_ChainParse( p_mux, "ffmpeg-", ppsz_mux_options, p_mux->p_cfg );
98 /* Find the requested muxer */
99 psz_mux = var_GetNonEmptyString( p_mux, "ffmpeg-mux" );
102 #if( LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT( 52, 45, 0 ) )
103 file_oformat = av_guess_format( psz_mux, NULL, NULL );
105 file_oformat = guess_format( psz_mux, NULL, NULL );
112 #if( LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT( 52, 45, 0 ) )
113 av_guess_format( NULL, p_mux->p_access->psz_path, NULL);
115 guess_format( NULL, p_mux->p_access->psz_path, NULL);
120 msg_Err( p_mux, "unable for find a suitable output format" );
124 /* Fill p_mux fields */
125 p_mux->pf_control = Control;
126 p_mux->pf_addstream = AddStream;
127 p_mux->pf_delstream = DelStream;
129 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
131 p_sys->oc = avformat_alloc_context();
132 p_sys->oc->oformat = file_oformat;
134 /* Create I/O wrapper */
135 p_sys->io_buffer_size = 32768; /* FIXME */
136 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
137 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
138 1, p_mux, NULL, IOWrite, IOSeek );
140 memset( ap, 0, sizeof(*ap) );
141 if( av_set_parameters( p_sys->oc, ap ) < 0 )
143 msg_Err( p_mux, "invalid encoding parameters" );
144 av_free( p_sys->oc );
145 free( p_sys->io_buffer );
150 p_sys->oc->pb = &p_sys->io;
151 p_sys->oc->nb_streams = 0;
153 p_sys->b_write_header = true;
154 p_sys->b_error = false;
155 p_sys->i_initial_dts = 0;
160 /*****************************************************************************
162 *****************************************************************************/
163 void CloseMux( vlc_object_t *p_this )
165 sout_mux_t *p_mux = (sout_mux_t*)p_this;
166 sout_mux_sys_t *p_sys = p_mux->p_sys;
168 if( !p_sys->b_write_header && !p_sys->b_error && av_write_trailer( p_sys->oc ) < 0 )
170 msg_Err( p_mux, "could not write trailer" );
173 #if( LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT( 52, 96, 0 ) )
174 avformat_free_context(p_sys->oc);
176 for( unsigned i = 0 ; i < p_sys->oc->nb_streams; i++ )
178 av_free( p_sys->oc->streams[i]->codec->extradata );
179 av_free( p_sys->oc->streams[i]->codec );
180 #if( LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT( 52, 81, 0 ) )
181 av_free( p_sys->oc->streams[i]->info );
183 av_free( p_sys->oc->streams[i] );
185 av_free( p_sys->oc->streams );
186 av_free( p_sys->oc );
189 free( p_sys->io_buffer );
193 /*****************************************************************************
195 *****************************************************************************/
196 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
198 sout_mux_sys_t *p_sys = p_mux->p_sys;
199 AVCodecContext *codec;
203 msg_Dbg( p_mux, "adding input" );
205 if( !GetFfmpegCodec( p_input->p_fmt->i_codec, 0, &i_codec_id, 0 ) )
207 msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
208 (char *)&p_input->p_fmt->i_codec );
212 p_input->p_sys = malloc( sizeof( int ) );
213 *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
215 if( p_input->p_fmt->i_cat != VIDEO_ES && p_input->p_fmt->i_cat != AUDIO_ES)
217 msg_Warn( p_mux, "Unhandled ES category" );
221 #if (LIBAVFORMAT_VERSION_INT >= ((53<<16)+(10<<8)+0))
222 stream = avformat_new_stream( p_sys->oc, NULL);
224 stream = av_new_stream( p_sys->oc, p_sys->oc->nb_streams);
228 free( p_input->p_sys );
231 codec = stream->codec;
233 /* This is used by LibavutilCallback (avutil.h) to print messages */
234 codec->opaque = (void*)p_mux;
236 switch( p_input->p_fmt->i_cat )
239 codec->codec_type = AVMEDIA_TYPE_AUDIO;
240 codec->channels = p_input->p_fmt->audio.i_channels;
241 codec->sample_rate = p_input->p_fmt->audio.i_rate;
242 codec->time_base = (AVRational){1, codec->sample_rate};
243 codec->frame_size = p_input->p_fmt->audio.i_frame_length;
247 if( !p_input->p_fmt->video.i_frame_rate ||
248 !p_input->p_fmt->video.i_frame_rate_base )
250 msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
251 p_input->p_fmt->video.i_frame_rate = 25;
252 p_input->p_fmt->video.i_frame_rate_base = 1;
254 codec->codec_type = AVMEDIA_TYPE_VIDEO;
255 codec->width = p_input->p_fmt->video.i_width;
256 codec->height = p_input->p_fmt->video.i_height;
257 av_reduce( &codec->sample_aspect_ratio.num,
258 &codec->sample_aspect_ratio.den,
259 p_input->p_fmt->video.i_sar_num,
260 p_input->p_fmt->video.i_sar_den, 1 << 30 /* something big */ );
261 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
262 stream->sample_aspect_ratio.num = codec->sample_aspect_ratio.num;
263 stream->sample_aspect_ratio.den = codec->sample_aspect_ratio.den;
265 codec->time_base.den = p_input->p_fmt->video.i_frame_rate;
266 codec->time_base.num = p_input->p_fmt->video.i_frame_rate_base;
271 codec->bit_rate = p_input->p_fmt->i_bitrate;
272 #if LIBAVFORMAT_VERSION_INT >= ((51<<16)+(8<<8)+0)
273 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
274 if( !codec->codec_tag && i_codec_id == CODEC_ID_MP2 )
276 i_codec_id = CODEC_ID_MP3;
277 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
280 # warning "WARNING!!!!!!!"
281 # warning "Using libavformat muxing with versions older than 51.8.0 (r7593) might produce broken files."
283 if( i_codec_id == CODEC_ID_MP2 )
284 i_codec_id = CODEC_ID_MP3;
285 codec->codec_tag = p_input->p_fmt->i_original_fourcc ?: p_input->p_fmt->i_codec;
287 codec->codec_id = i_codec_id;
289 if( p_input->p_fmt->i_extra )
291 codec->extradata_size = p_input->p_fmt->i_extra;
292 codec->extradata = av_malloc( p_input->p_fmt->i_extra );
293 memcpy( codec->extradata, p_input->p_fmt->p_extra,
294 p_input->p_fmt->i_extra );
300 /*****************************************************************************
302 *****************************************************************************/
303 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
305 msg_Dbg( p_mux, "removing input" );
306 free( p_input->p_sys );
310 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
312 sout_mux_sys_t *p_sys = p_mux->p_sys;
313 block_t *p_data = block_FifoGet( p_input->p_fifo );
314 int i_stream = *((int *)p_input->p_sys);
315 AVStream *p_stream = p_sys->oc->streams[i_stream];
318 memset( &pkt, 0, sizeof(AVPacket) );
320 av_init_packet(&pkt);
321 pkt.data = p_data->p_buffer;
322 pkt.size = p_data->i_buffer;
323 pkt.stream_index = i_stream;
325 if( p_data->i_flags & BLOCK_FLAG_TYPE_I ) pkt.flags |= AV_PKT_FLAG_KEY;
327 /* avformat expects pts/dts which start from 0 */
328 p_data->i_dts -= p_mux->p_sys->i_initial_dts;
329 p_data->i_pts -= p_mux->p_sys->i_initial_dts;
331 if( p_data->i_pts > 0 )
332 pkt.pts = p_data->i_pts * p_stream->time_base.den /
333 INT64_C(1000000) / p_stream->time_base.num;
334 if( p_data->i_dts > 0 )
335 pkt.dts = p_data->i_dts * p_stream->time_base.den /
336 INT64_C(1000000) / p_stream->time_base.num;
338 /* this is another hack to prevent libavformat from triggering the "non monotone timestamps" check in avformat/utils.c */
339 p_stream->cur_dts = ( p_data->i_dts * p_stream->time_base.den /
340 INT64_C(1000000) / p_stream->time_base.num ) - 1;
342 if( av_write_frame( p_sys->oc, &pkt ) < 0 )
344 msg_Err( p_mux, "could not write frame (pts: %"PRId64", dts: %"PRId64") "
345 "(pkt pts: %"PRId64", dts: %"PRId64")",
346 p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
347 block_Release( p_data );
351 block_Release( p_data );
355 /*****************************************************************************
356 * Mux: multiplex available data in input fifos
357 *****************************************************************************/
358 static int Mux( sout_mux_t *p_mux )
360 sout_mux_sys_t *p_sys = p_mux->p_sys;
362 if( p_sys->b_error ) return VLC_EGENERIC;
364 if( p_sys->b_write_header )
366 msg_Dbg( p_mux, "writing header" );
368 if( av_write_header( p_sys->oc ) < 0 )
370 msg_Err( p_mux, "could not write header" );
371 p_sys->b_write_header = false;
372 p_sys->b_error = true;
376 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
377 avio_flush( p_sys->oc->pb );
379 avio_flush( &p_sys->oc->pb );
381 p_sys->b_write_header = false;
388 int i_stream = sout_MuxGetStream( p_mux, 1, &i_dts );
392 if( !p_mux->p_sys->i_initial_dts )
393 p_mux->p_sys->i_initial_dts = i_dts;
395 MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
401 /*****************************************************************************
403 *****************************************************************************/
404 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
410 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
411 pb_bool = (bool*)va_arg( args, bool * );
415 case MUX_GET_ADD_STREAM_WAIT:
416 pb_bool = (bool*)va_arg( args, bool * );
422 char **ppsz = (char**)va_arg( args, char ** );
423 *ppsz = strdup( p_mux->p_sys->oc->oformat->mime_type );
432 /*****************************************************************************
433 * I/O wrappers for libavformat
434 *****************************************************************************/
435 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
437 sout_mux_t *p_mux = opaque;
440 #ifdef AVFORMAT_DEBUG
441 msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
444 block_t *p_buf = block_New( p_mux->p_sout, buf_size );
445 if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
447 if( p_mux->p_sys->b_write_header )
448 p_buf->i_flags |= BLOCK_FLAG_HEADER;
450 i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
451 return i_ret ? i_ret : -1;
454 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
456 sout_mux_t *p_mux = opaque;
458 #ifdef AVFORMAT_DEBUG
459 msg_Dbg( p_mux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
465 return sout_AccessOutSeek( p_mux->p_access, offset );