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_LIBAVFORMAT_AVFORMAT_H
38 # include <libavformat/avformat.h>
39 #elif defined(HAVE_FFMPEG_AVFORMAT_H)
40 # include <ffmpeg/avformat.h>
41 #elif defined(HAVE_LIBAVFORMAT_TREE)
42 # include <avformat.h>
47 //#define AVFORMAT_DEBUG 1
49 /* Version checking */
50 #if defined(HAVE_LIBAVFORMAT_AVFORMAT_H) || defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE)
52 static const char *ppsz_mux_options[] = {
56 /*****************************************************************************
57 * mux_sys_t: mux descriptor
58 *****************************************************************************/
69 vlc_bool_t b_write_header;
72 int64_t i_initial_dts;
75 /*****************************************************************************
77 *****************************************************************************/
78 static int Control ( sout_mux_t *, int, va_list );
79 static int AddStream( sout_mux_t *, sout_input_t * );
80 static int DelStream( sout_mux_t *, sout_input_t * );
81 static int Mux ( sout_mux_t * );
83 static int IOWrite( void *opaque, uint8_t *buf, int buf_size );
84 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
86 /*****************************************************************************
88 *****************************************************************************/
89 int E_(OpenMux)( vlc_object_t *p_this )
91 AVOutputFormat *file_oformat;
92 sout_mux_t *p_mux = (sout_mux_t*)p_this;
93 sout_mux_sys_t *p_sys;
94 AVFormatParameters params, *ap = ¶ms;
97 /* Should we call it only once ? */
99 av_log_set_callback( E_(LibavcodecCallback) );
101 config_ChainParse( p_mux, "ffmpeg-", ppsz_mux_options, p_mux->p_cfg );
103 /* Find the requested muxer */
104 psz_mux = var_GetNonEmptyString( p_mux, "ffmpeg-mux" );
107 file_oformat = guess_format( psz_mux, NULL, NULL );
112 guess_format(NULL, p_mux->p_access->psz_path, NULL);
116 msg_Err( p_mux, "unable for find a suitable output format" );
120 /* Fill p_mux fields */
121 p_mux->pf_control = Control;
122 p_mux->pf_addstream = AddStream;
123 p_mux->pf_delstream = DelStream;
125 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
127 p_sys->oc = av_alloc_format_context();
128 p_sys->oc->oformat = file_oformat;
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_mux;
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 = 0;
138 p_sys->url.prot->url_write =
139 (int (*) (URLContext *, unsigned char *, int))IOWrite;
140 p_sys->url.prot->url_seek =
141 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
142 p_sys->url.prot->url_close = 0;
143 p_sys->url.prot->next = 0;
144 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
145 1, &p_sys->url, NULL, IOWrite, IOSeek );
147 memset( ap, 0, sizeof(*ap) );
148 if( av_set_parameters( p_sys->oc, ap ) < 0 )
150 msg_Err( p_mux, "invalid encoding parameters" );
151 av_free( p_sys->oc );
152 free( p_sys->io_buffer );
157 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
158 p_sys->oc->pb = &p_sys->io;
160 p_sys->oc->pb = p_sys->io;
162 p_sys->oc->nb_streams = 0;
164 p_sys->b_write_header = VLC_TRUE;
165 p_sys->b_error = VLC_FALSE;
166 p_sys->i_initial_dts = 0;
171 /*****************************************************************************
173 *****************************************************************************/
174 void E_(CloseMux)( vlc_object_t *p_this )
176 sout_mux_t *p_mux = (sout_mux_t*)p_this;
177 sout_mux_sys_t *p_sys = p_mux->p_sys;
180 if( av_write_trailer( p_sys->oc ) < 0 )
182 msg_Err( p_mux, "could not write trailer" );
185 for( i = 0 ; i < p_sys->oc->nb_streams; i++ )
187 if( p_sys->oc->streams[i]->codec->extradata )
188 av_free( p_sys->oc->streams[i]->codec->extradata );
189 av_free( p_sys->oc->streams[i]->codec );
190 av_free( p_sys->oc->streams[i] );
192 av_free( p_sys->oc );
194 free( p_sys->io_buffer );
198 /*****************************************************************************
200 *****************************************************************************/
201 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
203 sout_mux_sys_t *p_sys = p_mux->p_sys;
204 AVCodecContext *codec;
206 int i_codec_id, i_aspect_num, i_aspect_den;
208 msg_Dbg( p_mux, "adding input" );
210 if( !E_(GetFfmpegCodec)( p_input->p_fmt->i_codec, 0, &i_codec_id, 0 ) )
212 msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
213 (char *)&p_input->p_fmt->i_codec );
217 p_input->p_sys = malloc( sizeof( int ) );
218 *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
220 stream = av_new_stream( p_sys->oc, p_sys->oc->nb_streams);
223 free( p_input->p_sys );
226 codec = stream->codec;
228 /* This is used by LibavcodecCallback (ffmpeg.c) to print messages */
229 codec->opaque = (void*)p_mux;
231 switch( p_input->p_fmt->i_cat )
234 codec->codec_type = CODEC_TYPE_AUDIO;
235 codec->channels = p_input->p_fmt->audio.i_channels;
236 codec->sample_rate = p_input->p_fmt->audio.i_rate;
237 codec->time_base = (AVRational){1, codec->sample_rate};
241 if( !p_input->p_fmt->video.i_frame_rate ||
242 !p_input->p_fmt->video.i_frame_rate_base )
244 msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
245 p_input->p_fmt->video.i_frame_rate = 25;
246 p_input->p_fmt->video.i_frame_rate_base = 1;
248 codec->codec_type = CODEC_TYPE_VIDEO;
249 codec->width = p_input->p_fmt->video.i_width;
250 codec->height = p_input->p_fmt->video.i_height;
251 av_reduce( &i_aspect_num, &i_aspect_den,
252 p_input->p_fmt->video.i_aspect,
253 VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
254 av_reduce( &codec->sample_aspect_ratio.num,
255 &codec->sample_aspect_ratio.den,
256 i_aspect_num * (int64_t)codec->height,
257 i_aspect_den * (int64_t)codec->width, 1 << 30 );
258 codec->time_base.den = p_input->p_fmt->video.i_frame_rate;
259 codec->time_base.num = p_input->p_fmt->video.i_frame_rate_base;
263 msg_Warn( p_mux, "Unhandled ES category" );
266 codec->bit_rate = p_input->p_fmt->i_bitrate;
267 #if LIBAVFORMAT_VERSION_INT >= ((51<<16)+(8<<8)+0)
268 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
269 if( !codec->codec_tag && i_codec_id == CODEC_ID_MP2 )
271 i_codec_id = CODEC_ID_MP3;
272 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
275 # warning "WARNING!!!!!!!"
276 # warning "Using libavformat muxing with versions older than 51.8.0 (r7593) might produce broken files."
278 if( i_codec_id == CODEC_ID_MP2 )
279 i_codec_id = CODEC_ID_MP3;
280 codec->codec_tag = p_input->p_fmt->i_codec;
282 codec->codec_id = i_codec_id;
284 if( p_input->p_fmt->i_extra )
286 codec->extradata_size = p_input->p_fmt->i_extra;
287 codec->extradata = av_malloc( p_input->p_fmt->i_extra );
288 memcpy( codec->extradata, p_input->p_fmt->p_extra,
289 p_input->p_fmt->i_extra );
295 /*****************************************************************************
297 *****************************************************************************/
298 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
300 msg_Dbg( p_mux, "removing input" );
301 free( p_input->p_sys );
306 * TODO move this function to src/stream_output.c (used by nearly all muxers)
308 static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
313 for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
315 block_fifo_t *p_fifo;
317 p_fifo = p_mux->pp_inputs[i]->p_fifo;
319 /* We don't really need to have anything in the SPU fifo */
320 if( p_mux->pp_inputs[i]->p_fmt->i_cat == SPU_ES &&
321 block_FifoCount( p_fifo ) == 0 ) continue;
323 if( block_FifoCount( p_fifo ) )
327 p_buf = block_FifoShow( p_fifo );
328 if( i_stream < 0 || p_buf->i_dts < i_dts )
330 i_dts = p_buf->i_dts;
337 if( pi_stream ) *pi_stream = i_stream;
338 if( pi_dts ) *pi_dts = i_dts;
339 if( !p_mux->p_sys->i_initial_dts ) p_mux->p_sys->i_initial_dts = i_dts;
343 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
345 sout_mux_sys_t *p_sys = p_mux->p_sys;
346 block_t *p_data = block_FifoGet( p_input->p_fifo );
347 int i_stream = *((int *)p_input->p_sys);
348 AVStream *p_stream = p_sys->oc->streams[i_stream];
351 memset( &pkt, 0, sizeof(AVPacket) );
353 av_init_packet(&pkt);
354 pkt.data = p_data->p_buffer;
355 pkt.size = p_data->i_buffer;
356 pkt.stream_index = i_stream;
358 if( p_data->i_flags & BLOCK_FLAG_TYPE_I ) pkt.flags |= PKT_FLAG_KEY;
360 /* avformat expects pts/dts which start from 0 */
361 p_data->i_dts -= p_mux->p_sys->i_initial_dts;
362 p_data->i_pts -= p_mux->p_sys->i_initial_dts;
364 if( p_data->i_pts > 0 )
365 pkt.pts = p_data->i_pts * p_stream->time_base.den /
366 I64C(1000000) / p_stream->time_base.num;
367 if( p_data->i_dts > 0 )
368 pkt.dts = p_data->i_dts * p_stream->time_base.den /
369 I64C(1000000) / p_stream->time_base.num;
371 /* this is another hack to prevent libavformat from triggering the "non monotone timestamps" check in avformat/utils.c */
372 p_stream->cur_dts = ( p_data->i_dts * p_stream->time_base.den /
373 I64C(1000000) / p_stream->time_base.num ) - 1;
375 if( av_write_frame( p_sys->oc, &pkt ) < 0 )
377 msg_Err( p_mux, "could not write frame (pts: "I64Fd", dts: "I64Fd") "
378 "(pkt pts: "I64Fd", dts: "I64Fd")",
379 p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
380 block_Release( p_data );
384 block_Release( p_data );
388 /*****************************************************************************
389 * Mux: multiplex available data in input fifos
390 *****************************************************************************/
391 static int Mux( sout_mux_t *p_mux )
393 sout_mux_sys_t *p_sys = p_mux->p_sys;
396 if( p_sys->b_error ) return VLC_EGENERIC;
398 if( p_sys->b_write_header )
400 msg_Dbg( p_mux, "writing header" );
402 if( av_write_header( p_sys->oc ) < 0 )
404 msg_Err( p_mux, "could not write header" );
405 p_sys->b_write_header = VLC_FALSE;
406 p_sys->b_error = VLC_TRUE;
410 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
411 put_flush_packet( p_sys->oc->pb );
413 put_flush_packet( &p_sys->oc->pb );
415 p_sys->b_write_header = VLC_FALSE;
420 if( MuxGetStream( p_mux, &i_stream, 0 ) < 0 ) return VLC_SUCCESS;
421 MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
427 /*****************************************************************************
429 *****************************************************************************/
430 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
436 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
437 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
438 *pb_bool = VLC_FALSE;
441 case MUX_GET_ADD_STREAM_WAIT:
442 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
448 char **ppsz = (char**)va_arg( args, char ** );
449 *ppsz = strdup( p_mux->p_sys->oc->oformat->mime_type );
458 /*****************************************************************************
459 * I/O wrappers for libavformat
460 *****************************************************************************/
461 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
463 URLContext *p_url = opaque;
464 sout_mux_t *p_mux = p_url->priv_data;
467 #ifdef AVFORMAT_DEBUG
468 msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
471 block_t *p_buf = block_New( p_mux->p_sout, buf_size );
472 if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
474 if( p_mux->p_sys->b_write_header )
475 p_buf->i_flags |= BLOCK_FLAG_HEADER;
477 i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
478 return i_ret ? i_ret : -1;
481 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
483 URLContext *p_url = opaque;
484 sout_mux_t *p_mux = p_url->priv_data;
487 #ifdef AVFORMAT_DEBUG
488 msg_Dbg( p_mux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
502 if( sout_AccessOutSeek( p_mux->p_access, i_absolute ) )
510 #endif /* HAVE_FFMPEG_AVFORMAT_H */