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 *****************************************************************************/
29 #include <vlc_block.h>
33 #ifdef HAVE_FFMPEG_AVFORMAT_H
34 # include <ffmpeg/avformat.h>
35 #elif defined(HAVE_LIBAVFORMAT_TREE)
36 # include <avformat.h>
41 //#define AVFORMAT_DEBUG 1
43 /* Version checking */
44 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE)
46 static const char *ppsz_mux_options[] = {
50 /*****************************************************************************
51 * mux_sys_t: mux descriptor
52 *****************************************************************************/
63 vlc_bool_t b_write_header;
66 int64_t i_initial_dts;
69 /*****************************************************************************
71 *****************************************************************************/
72 static int Control ( sout_mux_t *, int, va_list );
73 static int AddStream( sout_mux_t *, sout_input_t * );
74 static int DelStream( sout_mux_t *, sout_input_t * );
75 static int Mux ( sout_mux_t * );
77 static int IOWrite( void *opaque, uint8_t *buf, int buf_size );
78 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
80 /*****************************************************************************
82 *****************************************************************************/
83 int E_(OpenMux)( vlc_object_t *p_this )
85 AVOutputFormat *file_oformat;
86 sout_mux_t *p_mux = (sout_mux_t*)p_this;
87 sout_mux_sys_t *p_sys;
88 AVFormatParameters params, *ap = ¶ms;
91 /* Should we call it only once ? */
93 av_log_set_callback( E_(LibavcodecCallback) );
95 config_ChainParse( p_mux, "ffmpeg-", ppsz_mux_options, p_mux->p_cfg );
97 /* Find the requested muxer */
98 psz_mux = var_GetNonEmptyString( p_mux, "ffmpeg-mux" );
101 file_oformat = guess_format( psz_mux, NULL, NULL );
106 guess_format(NULL, p_mux->p_access->psz_path, NULL);
110 msg_Err( p_mux, "unable for find a suitable output format" );
114 /* Fill p_mux fields */
115 p_mux->pf_control = Control;
116 p_mux->pf_addstream = AddStream;
117 p_mux->pf_delstream = DelStream;
119 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
121 p_sys->oc = av_alloc_format_context();
122 p_sys->oc->oformat = file_oformat;
124 /* Create I/O wrapper */
125 p_sys->io_buffer_size = 32768; /* FIXME */
126 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
127 p_sys->url.priv_data = p_mux;
128 p_sys->url.prot = &p_sys->prot;
129 p_sys->url.prot->name = "VLC I/O wrapper";
130 p_sys->url.prot->url_open = 0;
131 p_sys->url.prot->url_read = 0;
132 p_sys->url.prot->url_write =
133 (int (*) (URLContext *, unsigned char *, int))IOWrite;
134 p_sys->url.prot->url_seek =
135 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
136 p_sys->url.prot->url_close = 0;
137 p_sys->url.prot->next = 0;
138 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
139 1, &p_sys->url, NULL, IOWrite, IOSeek );
141 memset( ap, 0, sizeof(*ap) );
142 if( av_set_parameters( p_sys->oc, ap ) < 0 )
144 msg_Err( p_mux, "invalid encoding parameters" );
145 av_free( p_sys->oc );
146 free( p_sys->io_buffer );
151 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
152 p_sys->oc->pb = &p_sys->io;
154 p_sys->oc->pb = p_sys->io;
156 p_sys->oc->nb_streams = 0;
158 p_sys->b_write_header = VLC_TRUE;
159 p_sys->b_error = VLC_FALSE;
160 p_sys->i_initial_dts = 0;
165 /*****************************************************************************
167 *****************************************************************************/
168 void E_(CloseMux)( vlc_object_t *p_this )
170 sout_mux_t *p_mux = (sout_mux_t*)p_this;
171 sout_mux_sys_t *p_sys = p_mux->p_sys;
174 if( av_write_trailer( p_sys->oc ) < 0 )
176 msg_Err( p_mux, "could not write trailer" );
179 for( i = 0 ; i < p_sys->oc->nb_streams; i++ )
181 if( p_sys->oc->streams[i]->codec->extradata )
182 av_free( p_sys->oc->streams[i]->codec->extradata );
183 av_free( p_sys->oc->streams[i]->codec );
184 av_free( p_sys->oc->streams[i] );
186 av_free( p_sys->oc );
188 free( p_sys->io_buffer );
192 /*****************************************************************************
194 *****************************************************************************/
195 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
197 sout_mux_sys_t *p_sys = p_mux->p_sys;
198 AVCodecContext *codec;
200 int i_codec_id, i_aspect_num, i_aspect_den;
202 msg_Dbg( p_mux, "adding input" );
204 if( !E_(GetFfmpegCodec)( p_input->p_fmt->i_codec, 0, &i_codec_id, 0 ) )
206 msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
207 (char *)&p_input->p_fmt->i_codec );
211 p_input->p_sys = malloc( sizeof( int ) );
212 *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
214 stream = av_new_stream( p_sys->oc, p_sys->oc->nb_streams);
217 free( p_input->p_sys );
220 codec = stream->codec;
222 /* This is used by LibavcodecCallback (ffmpeg.c) to print messages */
223 codec->opaque = (void*)p_mux;
225 switch( p_input->p_fmt->i_cat )
228 codec->codec_type = CODEC_TYPE_AUDIO;
229 codec->channels = p_input->p_fmt->audio.i_channels;
230 codec->sample_rate = p_input->p_fmt->audio.i_rate;
231 codec->time_base = (AVRational){1, codec->sample_rate};
235 if( !p_input->p_fmt->video.i_frame_rate ||
236 !p_input->p_fmt->video.i_frame_rate_base )
238 msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
239 p_input->p_fmt->video.i_frame_rate = 25;
240 p_input->p_fmt->video.i_frame_rate_base = 1;
242 codec->codec_type = CODEC_TYPE_VIDEO;
243 codec->width = p_input->p_fmt->video.i_width;
244 codec->height = p_input->p_fmt->video.i_height;
245 av_reduce( &i_aspect_num, &i_aspect_den,
246 p_input->p_fmt->video.i_aspect,
247 VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
248 av_reduce( &codec->sample_aspect_ratio.num,
249 &codec->sample_aspect_ratio.den,
250 i_aspect_num * (int64_t)codec->height,
251 i_aspect_den * (int64_t)codec->width, 1 << 30 );
252 codec->time_base.den = p_input->p_fmt->video.i_frame_rate;
253 codec->time_base.num = p_input->p_fmt->video.i_frame_rate_base;
257 msg_Warn( p_mux, "Unhandled ES category" );
260 codec->bit_rate = p_input->p_fmt->i_bitrate;
261 #if LIBAVFORMAT_VERSION_INT >= ((51<<16)+(8<<8)+0)
262 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
263 if( !codec->codec_tag && i_codec_id == CODEC_ID_MP2 )
265 i_codec_id = CODEC_ID_MP3;
266 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
269 # warning "WARNING!!!!!!!"
270 # warning "Using libavformat muxing with versions older than 51.8.0 (r7593) might produce broken files."
272 if( i_codec_id == CODEC_ID_MP2 )
273 i_codec_id = CODEC_ID_MP3;
274 codec->codec_tag = p_input->p_fmt->i_codec;
276 codec->codec_id = i_codec_id;
278 if( p_input->p_fmt->i_extra )
280 codec->extradata_size = p_input->p_fmt->i_extra;
281 codec->extradata = av_malloc( p_input->p_fmt->i_extra );
282 memcpy( codec->extradata, p_input->p_fmt->p_extra,
283 p_input->p_fmt->i_extra );
289 /*****************************************************************************
291 *****************************************************************************/
292 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
294 msg_Dbg( p_mux, "removing input" );
295 free( p_input->p_sys );
300 * TODO move this function to src/stream_output.c (used by nearly all muxers)
302 static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
307 for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
309 block_fifo_t *p_fifo;
311 p_fifo = p_mux->pp_inputs[i]->p_fifo;
313 /* We don't really need to have anything in the SPU fifo */
314 if( p_mux->pp_inputs[i]->p_fmt->i_cat == SPU_ES &&
315 block_FifoCount( p_fifo ) == 0 ) continue;
317 if( block_FifoCount( p_fifo ) )
321 p_buf = block_FifoShow( p_fifo );
322 if( i_stream < 0 || p_buf->i_dts < i_dts )
324 i_dts = p_buf->i_dts;
331 if( pi_stream ) *pi_stream = i_stream;
332 if( pi_dts ) *pi_dts = i_dts;
333 if( !p_mux->p_sys->i_initial_dts ) p_mux->p_sys->i_initial_dts = i_dts;
337 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
339 sout_mux_sys_t *p_sys = p_mux->p_sys;
340 block_t *p_data = block_FifoGet( p_input->p_fifo );
341 int i_stream = *((int *)p_input->p_sys);
342 AVStream *p_stream = p_sys->oc->streams[i_stream];
345 memset( &pkt, 0, sizeof(AVPacket) );
347 av_init_packet(&pkt);
348 pkt.data = p_data->p_buffer;
349 pkt.size = p_data->i_buffer;
350 pkt.stream_index = i_stream;
352 if( p_data->i_flags & BLOCK_FLAG_TYPE_I ) pkt.flags |= PKT_FLAG_KEY;
354 /* avformat expects pts/dts which start from 0 */
355 p_data->i_dts -= p_mux->p_sys->i_initial_dts;
356 p_data->i_pts -= p_mux->p_sys->i_initial_dts;
358 if( p_data->i_pts > 0 )
359 pkt.pts = p_data->i_pts * p_stream->time_base.den /
360 I64C(1000000) / p_stream->time_base.num;
361 if( p_data->i_dts > 0 )
362 pkt.dts = p_data->i_dts * p_stream->time_base.den /
363 I64C(1000000) / p_stream->time_base.num;
365 /* this is another hack to prevent libavformat from triggering the "non monotone timestamps" check in avformat/utils.c */
366 p_stream->cur_dts = AV_NOPTS_VALUE;
368 if( av_write_frame( p_sys->oc, &pkt ) < 0 )
370 msg_Err( p_mux, "could not write frame (pts: "I64Fd", dts: "I64Fd") "
371 "(pkt pts: "I64Fd", dts: "I64Fd")",
372 p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
373 block_Release( p_data );
377 block_Release( p_data );
381 /*****************************************************************************
382 * Mux: multiplex available data in input fifos
383 *****************************************************************************/
384 static int Mux( sout_mux_t *p_mux )
386 sout_mux_sys_t *p_sys = p_mux->p_sys;
389 if( p_sys->b_error ) return VLC_EGENERIC;
391 if( p_sys->b_write_header )
393 msg_Dbg( p_mux, "writing header" );
395 if( av_write_header( p_sys->oc ) < 0 )
397 msg_Err( p_mux, "could not write header" );
398 p_sys->b_write_header = VLC_FALSE;
399 p_sys->b_error = VLC_TRUE;
403 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
404 put_flush_packet( p_sys->oc->pb );
406 put_flush_packet( &p_sys->oc->pb );
408 p_sys->b_write_header = VLC_FALSE;
413 if( MuxGetStream( p_mux, &i_stream, 0 ) < 0 ) return VLC_SUCCESS;
414 MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
420 /*****************************************************************************
422 *****************************************************************************/
423 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
429 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
430 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
431 *pb_bool = VLC_FALSE;
434 case MUX_GET_ADD_STREAM_WAIT:
435 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
441 char **ppsz = (char**)va_arg( args, char ** );
442 *ppsz = strdup( p_mux->p_sys->oc->oformat->mime_type );
451 /*****************************************************************************
452 * I/O wrappers for libavformat
453 *****************************************************************************/
454 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
456 URLContext *p_url = opaque;
457 sout_mux_t *p_mux = p_url->priv_data;
460 #ifdef AVFORMAT_DEBUG
461 msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
464 block_t *p_buf = block_New( p_mux->p_sout, buf_size );
465 if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
467 if( p_mux->p_sys->b_write_header )
468 p_buf->i_flags |= BLOCK_FLAG_HEADER;
470 i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
471 return i_ret ? i_ret : -1;
474 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
476 URLContext *p_url = opaque;
477 sout_mux_t *p_mux = p_url->priv_data;
480 #ifdef AVFORMAT_DEBUG
481 msg_Dbg( p_mux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
495 if( sout_AccessOutSeek( p_mux->p_access, i_absolute ) )
503 #endif /* HAVE_FFMPEG_AVFORMAT_H */