1 /*****************************************************************************
2 * mux.c: muxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2006 the VideoLAN team
5 * $Id: demux.c 8444 2004-08-17 08:21:07Z gbazin $
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 *****************************************************************************/
33 #include <vlc_block.h>
37 #ifdef HAVE_FFMPEG_AVFORMAT_H
38 # include <ffmpeg/avformat.h>
39 #elif defined(HAVE_LIBAVFORMAT_TREE)
40 # include <avformat.h>
45 //#define AVFORMAT_DEBUG 1
47 /* Version checking */
48 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE)
50 static const char *ppsz_mux_options[] = {
54 /*****************************************************************************
55 * mux_sys_t: mux descriptor
56 *****************************************************************************/
67 vlc_bool_t b_write_header;
70 int64_t i_initial_dts;
73 /*****************************************************************************
75 *****************************************************************************/
76 static int Control ( sout_mux_t *, int, va_list );
77 static int AddStream( sout_mux_t *, sout_input_t * );
78 static int DelStream( sout_mux_t *, sout_input_t * );
79 static int Mux ( sout_mux_t * );
81 static int IOWrite( void *opaque, uint8_t *buf, int buf_size );
82 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
84 /*****************************************************************************
86 *****************************************************************************/
87 int E_(OpenMux)( vlc_object_t *p_this )
89 AVOutputFormat *file_oformat;
90 sout_mux_t *p_mux = (sout_mux_t*)p_this;
91 sout_mux_sys_t *p_sys;
92 AVFormatParameters params, *ap = ¶ms;
95 /* Should we call it only once ? */
97 av_log_set_callback( E_(LibavcodecCallback) );
99 config_ChainParse( p_mux, "ffmpeg-", ppsz_mux_options, p_mux->p_cfg );
101 /* Find the requested muxer */
102 psz_mux = var_GetNonEmptyString( p_mux, "ffmpeg-mux" );
105 file_oformat = guess_format( psz_mux, NULL, NULL );
110 guess_format(NULL, p_mux->p_access->psz_path, NULL);
114 msg_Err( p_mux, "unable for find a suitable output format" );
118 /* Fill p_mux fields */
119 p_mux->pf_control = Control;
120 p_mux->pf_addstream = AddStream;
121 p_mux->pf_delstream = DelStream;
123 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
125 p_sys->oc = av_alloc_format_context();
126 p_sys->oc->oformat = file_oformat;
128 /* Create I/O wrapper */
129 p_sys->io_buffer_size = 32768; /* FIXME */
130 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
131 p_sys->url.priv_data = p_mux;
132 p_sys->url.prot = &p_sys->prot;
133 p_sys->url.prot->name = "VLC I/O wrapper";
134 p_sys->url.prot->url_open = 0;
135 p_sys->url.prot->url_read = 0;
136 p_sys->url.prot->url_write =
137 (int (*) (URLContext *, unsigned char *, int))IOWrite;
138 p_sys->url.prot->url_seek =
139 (offset_t (*) (URLContext *, offset_t, int))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 1, &p_sys->url, NULL, IOWrite, IOSeek );
145 memset( ap, 0, sizeof(*ap) );
146 if( av_set_parameters( p_sys->oc, ap ) < 0 )
148 msg_Err( p_mux, "invalid encoding parameters" );
149 av_free( p_sys->oc );
150 free( p_sys->io_buffer );
155 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
156 p_sys->oc->pb = &p_sys->io;
158 p_sys->oc->pb = p_sys->io;
160 p_sys->oc->nb_streams = 0;
162 p_sys->b_write_header = VLC_TRUE;
163 p_sys->b_error = VLC_FALSE;
164 p_sys->i_initial_dts = 0;
169 /*****************************************************************************
171 *****************************************************************************/
172 void E_(CloseMux)( vlc_object_t *p_this )
174 sout_mux_t *p_mux = (sout_mux_t*)p_this;
175 sout_mux_sys_t *p_sys = p_mux->p_sys;
178 if( av_write_trailer( p_sys->oc ) < 0 )
180 msg_Err( p_mux, "could not write trailer" );
183 for( i = 0 ; i < p_sys->oc->nb_streams; i++ )
185 if( p_sys->oc->streams[i]->codec->extradata )
186 av_free( p_sys->oc->streams[i]->codec->extradata );
187 av_free( p_sys->oc->streams[i]->codec );
188 av_free( p_sys->oc->streams[i] );
190 av_free( p_sys->oc );
192 free( p_sys->io_buffer );
196 /*****************************************************************************
198 *****************************************************************************/
199 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
201 sout_mux_sys_t *p_sys = p_mux->p_sys;
202 AVCodecContext *codec;
204 int i_codec_id, i_aspect_num, i_aspect_den;
206 msg_Dbg( p_mux, "adding input" );
208 if( !E_(GetFfmpegCodec)( p_input->p_fmt->i_codec, 0, &i_codec_id, 0 ) )
210 msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
211 (char *)&p_input->p_fmt->i_codec );
215 p_input->p_sys = malloc( sizeof( int ) );
216 *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
218 stream = av_new_stream( p_sys->oc, p_sys->oc->nb_streams);
221 free( p_input->p_sys );
224 codec = stream->codec;
226 /* This is used by LibavcodecCallback (ffmpeg.c) to print messages */
227 codec->opaque = (void*)p_mux;
229 switch( p_input->p_fmt->i_cat )
232 codec->codec_type = CODEC_TYPE_AUDIO;
233 codec->channels = p_input->p_fmt->audio.i_channels;
234 codec->sample_rate = p_input->p_fmt->audio.i_rate;
235 codec->time_base = (AVRational){1, codec->sample_rate};
239 if( !p_input->p_fmt->video.i_frame_rate ||
240 !p_input->p_fmt->video.i_frame_rate_base )
242 msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
243 p_input->p_fmt->video.i_frame_rate = 25;
244 p_input->p_fmt->video.i_frame_rate_base = 1;
246 codec->codec_type = CODEC_TYPE_VIDEO;
247 codec->width = p_input->p_fmt->video.i_width;
248 codec->height = p_input->p_fmt->video.i_height;
249 av_reduce( &i_aspect_num, &i_aspect_den,
250 p_input->p_fmt->video.i_aspect,
251 VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
252 av_reduce( &codec->sample_aspect_ratio.num,
253 &codec->sample_aspect_ratio.den,
254 i_aspect_num * (int64_t)codec->height,
255 i_aspect_den * (int64_t)codec->width, 1 << 30 );
256 codec->time_base.den = p_input->p_fmt->video.i_frame_rate;
257 codec->time_base.num = p_input->p_fmt->video.i_frame_rate_base;
261 msg_Warn( p_mux, "Unhandled ES category" );
264 codec->bit_rate = p_input->p_fmt->i_bitrate;
265 #if LIBAVFORMAT_VERSION_INT >= ((51<<16)+(8<<8)+0)
266 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
267 if( !codec->codec_tag && i_codec_id == CODEC_ID_MP2 )
269 i_codec_id = CODEC_ID_MP3;
270 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
273 # warning "WARNING!!!!!!!"
274 # warning "Using libavformat muxing with versions older than 51.8.0 (r7593) might produce broken files."
276 if( i_codec_id == CODEC_ID_MP2 )
277 i_codec_id = CODEC_ID_MP3;
278 codec->codec_tag = p_input->p_fmt->i_codec;
280 codec->codec_id = i_codec_id;
282 if( p_input->p_fmt->i_extra )
284 codec->extradata_size = p_input->p_fmt->i_extra;
285 codec->extradata = av_malloc( p_input->p_fmt->i_extra );
286 memcpy( codec->extradata, p_input->p_fmt->p_extra,
287 p_input->p_fmt->i_extra );
293 /*****************************************************************************
295 *****************************************************************************/
296 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
298 msg_Dbg( p_mux, "removing input" );
299 free( p_input->p_sys );
304 * TODO move this function to src/stream_output.c (used by nearly all muxers)
306 static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
311 for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
313 block_fifo_t *p_fifo;
315 p_fifo = p_mux->pp_inputs[i]->p_fifo;
317 /* We don't really need to have anything in the SPU fifo */
318 if( p_mux->pp_inputs[i]->p_fmt->i_cat == SPU_ES &&
319 block_FifoCount( p_fifo ) == 0 ) continue;
321 if( block_FifoCount( p_fifo ) )
325 p_buf = block_FifoShow( p_fifo );
326 if( i_stream < 0 || p_buf->i_dts < i_dts )
328 i_dts = p_buf->i_dts;
335 if( pi_stream ) *pi_stream = i_stream;
336 if( pi_dts ) *pi_dts = i_dts;
337 if( !p_mux->p_sys->i_initial_dts ) p_mux->p_sys->i_initial_dts = i_dts;
341 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
343 sout_mux_sys_t *p_sys = p_mux->p_sys;
344 block_t *p_data = block_FifoGet( p_input->p_fifo );
345 int i_stream = *((int *)p_input->p_sys);
346 AVStream *p_stream = p_sys->oc->streams[i_stream];
349 memset( &pkt, 0, sizeof(AVPacket) );
351 av_init_packet(&pkt);
352 pkt.data = p_data->p_buffer;
353 pkt.size = p_data->i_buffer;
354 pkt.stream_index = i_stream;
356 if( p_data->i_flags & BLOCK_FLAG_TYPE_I ) pkt.flags |= PKT_FLAG_KEY;
358 /* avformat expects pts/dts which start from 0 */
359 p_data->i_dts -= p_mux->p_sys->i_initial_dts;
360 p_data->i_pts -= p_mux->p_sys->i_initial_dts;
362 if( p_data->i_pts > 0 )
363 pkt.pts = p_data->i_pts * p_stream->time_base.den /
364 I64C(1000000) / p_stream->time_base.num;
365 if( p_data->i_dts > 0 )
366 pkt.dts = p_data->i_dts * p_stream->time_base.den /
367 I64C(1000000) / p_stream->time_base.num;
369 /* this is another hack to prevent libavformat from triggering the "non monotone timestamps" check in avformat/utils.c */
370 p_stream->cur_dts = AV_NOPTS_VALUE;
372 if( av_write_frame( p_sys->oc, &pkt ) < 0 )
374 msg_Err( p_mux, "could not write frame (pts: "I64Fd", dts: "I64Fd") "
375 "(pkt pts: "I64Fd", dts: "I64Fd")",
376 p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
377 block_Release( p_data );
381 block_Release( p_data );
385 /*****************************************************************************
386 * Mux: multiplex available data in input fifos
387 *****************************************************************************/
388 static int Mux( sout_mux_t *p_mux )
390 sout_mux_sys_t *p_sys = p_mux->p_sys;
393 if( p_sys->b_error ) return VLC_EGENERIC;
395 if( p_sys->b_write_header )
397 msg_Dbg( p_mux, "writing header" );
399 if( av_write_header( p_sys->oc ) < 0 )
401 msg_Err( p_mux, "could not write header" );
402 p_sys->b_write_header = VLC_FALSE;
403 p_sys->b_error = VLC_TRUE;
407 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
408 put_flush_packet( p_sys->oc->pb );
410 put_flush_packet( &p_sys->oc->pb );
412 p_sys->b_write_header = VLC_FALSE;
417 if( MuxGetStream( p_mux, &i_stream, 0 ) < 0 ) return VLC_SUCCESS;
418 MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
424 /*****************************************************************************
426 *****************************************************************************/
427 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
433 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
434 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
435 *pb_bool = VLC_FALSE;
438 case MUX_GET_ADD_STREAM_WAIT:
439 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
445 char **ppsz = (char**)va_arg( args, char ** );
446 *ppsz = strdup( p_mux->p_sys->oc->oformat->mime_type );
455 /*****************************************************************************
456 * I/O wrappers for libavformat
457 *****************************************************************************/
458 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
460 URLContext *p_url = opaque;
461 sout_mux_t *p_mux = p_url->priv_data;
464 #ifdef AVFORMAT_DEBUG
465 msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
468 block_t *p_buf = block_New( p_mux->p_sout, buf_size );
469 if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
471 if( p_mux->p_sys->b_write_header )
472 p_buf->i_flags |= BLOCK_FLAG_HEADER;
474 i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
475 return i_ret ? i_ret : -1;
478 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
480 URLContext *p_url = opaque;
481 sout_mux_t *p_mux = p_url->priv_data;
484 #ifdef AVFORMAT_DEBUG
485 msg_Dbg( p_mux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
499 if( sout_AccessOutSeek( p_mux->p_access, i_absolute ) )
507 #endif /* HAVE_FFMPEG_AVFORMAT_H */