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 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc_block.h>
34 #ifdef HAVE_FFMPEG_AVFORMAT_H
35 # include <ffmpeg/avformat.h>
36 #elif defined(HAVE_LIBAVFORMAT_TREE)
37 # include <avformat.h>
42 //#define AVFORMAT_DEBUG 1
44 /* Version checking */
45 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE)
47 static const char *ppsz_mux_options[] = {
51 /*****************************************************************************
52 * mux_sys_t: mux descriptor
53 *****************************************************************************/
64 vlc_bool_t b_write_header;
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 offset_t IOSeek( void *opaque, offset_t offset, int whence );
81 /*****************************************************************************
83 *****************************************************************************/
84 int E_(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( E_(LibavcodecCallback) );
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 file_oformat = guess_format( psz_mux, NULL, NULL );
107 guess_format(NULL, p_mux->p_access->psz_path, NULL);
111 msg_Err( p_mux, "unable for find a suitable output format" );
115 /* Fill p_mux fields */
116 p_mux->pf_control = Control;
117 p_mux->pf_addstream = AddStream;
118 p_mux->pf_delstream = DelStream;
120 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
122 p_sys->oc = av_alloc_format_context();
123 p_sys->oc->oformat = file_oformat;
125 /* Create I/O wrapper */
126 p_sys->io_buffer_size = 32768; /* FIXME */
127 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
128 p_sys->url.priv_data = p_mux;
129 p_sys->url.prot = &p_sys->prot;
130 p_sys->url.prot->name = "VLC I/O wrapper";
131 p_sys->url.prot->url_open = 0;
132 p_sys->url.prot->url_read = 0;
133 p_sys->url.prot->url_write =
134 (int (*) (URLContext *, unsigned char *, int))IOWrite;
135 p_sys->url.prot->url_seek =
136 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
137 p_sys->url.prot->url_close = 0;
138 p_sys->url.prot->next = 0;
139 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
140 1, &p_sys->url, NULL, IOWrite, IOSeek );
142 memset( ap, 0, sizeof(*ap) );
143 if( av_set_parameters( p_sys->oc, ap ) < 0 )
145 msg_Err( p_mux, "invalid encoding parameters" );
146 av_free( p_sys->oc );
147 free( p_sys->io_buffer );
152 p_sys->oc->pb = p_sys->io;
153 p_sys->oc->nb_streams = 0;
155 p_sys->b_write_header = VLC_TRUE;
156 p_sys->b_error = VLC_FALSE;
157 p_sys->i_initial_dts = 0;
162 /*****************************************************************************
164 *****************************************************************************/
165 void E_(CloseMux)( vlc_object_t *p_this )
167 sout_mux_t *p_mux = (sout_mux_t*)p_this;
168 sout_mux_sys_t *p_sys = p_mux->p_sys;
171 if( av_write_trailer( p_sys->oc ) < 0 )
173 msg_Err( p_mux, "could not write trailer" );
176 for( i = 0 ; i < p_sys->oc->nb_streams; i++ )
178 if( p_sys->oc->streams[i]->codec->extradata )
179 av_free( p_sys->oc->streams[i]->codec->extradata );
180 av_free( p_sys->oc->streams[i]->codec );
181 av_free( p_sys->oc->streams[i] );
183 av_free( p_sys->oc );
185 free( p_sys->io_buffer );
189 /*****************************************************************************
191 *****************************************************************************/
192 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
194 sout_mux_sys_t *p_sys = p_mux->p_sys;
195 AVCodecContext *codec;
197 int i_codec_id, i_aspect_num, i_aspect_den;
199 msg_Dbg( p_mux, "adding input" );
201 if( !E_(GetFfmpegCodec)( p_input->p_fmt->i_codec, 0, &i_codec_id, 0 ) )
203 msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
204 (char *)&p_input->p_fmt->i_codec );
208 p_input->p_sys = malloc( sizeof( int ) );
209 *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
211 stream = av_new_stream( p_sys->oc, p_sys->oc->nb_streams);
214 free( p_input->p_sys );
217 codec = stream->codec;
219 /* This is used by LibavcodecCallback (ffmpeg.c) to print messages */
220 codec->opaque = (void*)p_mux;
222 switch( p_input->p_fmt->i_cat )
225 codec->codec_type = CODEC_TYPE_AUDIO;
226 codec->channels = p_input->p_fmt->audio.i_channels;
227 codec->sample_rate = p_input->p_fmt->audio.i_rate;
228 codec->time_base = (AVRational){1, codec->sample_rate};
232 if( !p_input->p_fmt->video.i_frame_rate ||
233 !p_input->p_fmt->video.i_frame_rate_base )
235 msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
236 p_input->p_fmt->video.i_frame_rate = 25;
237 p_input->p_fmt->video.i_frame_rate_base = 1;
239 codec->codec_type = CODEC_TYPE_VIDEO;
240 codec->width = p_input->p_fmt->video.i_width;
241 codec->height = p_input->p_fmt->video.i_height;
242 av_reduce( &i_aspect_num, &i_aspect_den,
243 p_input->p_fmt->video.i_aspect,
244 VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
245 av_reduce( &codec->sample_aspect_ratio.num,
246 &codec->sample_aspect_ratio.den,
247 i_aspect_num * (int64_t)codec->height,
248 i_aspect_den * (int64_t)codec->width, 1 << 30 );
249 codec->time_base.den = p_input->p_fmt->video.i_frame_rate;
250 codec->time_base.num = p_input->p_fmt->video.i_frame_rate_base;
254 codec->bit_rate = p_input->p_fmt->i_bitrate;
255 #if LIBAVFORMAT_VERSION_INT >= ((51<<16)+(8<<8)+0)
256 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
257 if( !codec->codec_tag && i_codec_id == CODEC_ID_MP2 )
259 i_codec_id = CODEC_ID_MP3;
260 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
263 # warning "WARNING!!!!!!!"
264 # warning "Using libavformat muxing with versions older than 51.8.0 (r7593) might produce broken files.
266 if( i_codec_id == CODEC_ID_MP2 )
267 i_codec_id = CODEC_ID_MP3;
268 codec->codec_tag = p_input->p_fmt->i_codec;
270 codec->codec_id = i_codec_id;
272 if( p_input->p_fmt->i_extra )
274 codec->extradata_size = p_input->p_fmt->i_extra;
275 codec->extradata = av_malloc( p_input->p_fmt->i_extra );
276 memcpy( codec->extradata, p_input->p_fmt->p_extra,
277 p_input->p_fmt->i_extra );
283 /*****************************************************************************
285 *****************************************************************************/
286 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
288 msg_Dbg( p_mux, "removing input" );
289 free( p_input->p_sys );
294 * TODO move this function to src/stream_output.c (used by nearly all muxers)
296 static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
301 for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
303 block_fifo_t *p_fifo;
305 p_fifo = p_mux->pp_inputs[i]->p_fifo;
307 /* We don't really need to have anything in the SPU fifo */
308 if( p_mux->pp_inputs[i]->p_fmt->i_cat == SPU_ES &&
309 p_fifo->i_depth == 0 ) continue;
311 if( p_fifo->i_depth )
315 p_buf = block_FifoShow( p_fifo );
316 if( i_stream < 0 || p_buf->i_dts < i_dts )
318 i_dts = p_buf->i_dts;
325 if( pi_stream ) *pi_stream = i_stream;
326 if( pi_dts ) *pi_dts = i_dts;
327 if( !p_mux->p_sys->i_initial_dts ) p_mux->p_sys->i_initial_dts = i_dts;
331 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
333 sout_mux_sys_t *p_sys = p_mux->p_sys;
334 block_t *p_data = block_FifoGet( p_input->p_fifo );
335 int i_stream = *((int *)p_input->p_sys);
336 AVStream *p_stream = p_sys->oc->streams[i_stream];
339 memset( &pkt, 0, sizeof(AVPacket) );
341 av_init_packet(&pkt);
342 pkt.data = p_data->p_buffer;
343 pkt.size = p_data->i_buffer;
344 pkt.stream_index = i_stream;
346 if( p_data->i_flags & BLOCK_FLAG_TYPE_I ) pkt.flags |= PKT_FLAG_KEY;
348 /* avformat expects pts/dts which start from 0 */
349 p_data->i_dts -= p_mux->p_sys->i_initial_dts;
350 p_data->i_pts -= p_mux->p_sys->i_initial_dts;
352 if( p_data->i_pts > 0 )
353 pkt.pts = p_data->i_pts * p_stream->time_base.den /
354 I64C(1000000) / p_stream->time_base.num;
355 if( p_data->i_dts > 0 )
356 pkt.dts = p_data->i_dts * p_stream->time_base.den /
357 I64C(1000000) / p_stream->time_base.num;
359 /* this is another hack to prevent libavformat from triggering the "non monotone timestamps" check in avformat/utils.c */
360 p_stream->cur_dts = AV_NOPTS_VALUE;
362 if( av_write_frame( p_sys->oc, &pkt ) < 0 )
364 msg_Err( p_mux, "could not write frame (pts: "I64Fd", dts: "I64Fd") "
365 "(pkt pts: "I64Fd", dts: "I64Fd")",
366 p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
367 block_Release( p_data );
371 block_Release( p_data );
375 /*****************************************************************************
376 * Mux: multiplex available data in input fifos
377 *****************************************************************************/
378 static int Mux( sout_mux_t *p_mux )
380 sout_mux_sys_t *p_sys = p_mux->p_sys;
383 if( p_sys->b_error ) return VLC_EGENERIC;
385 if( p_sys->b_write_header )
387 msg_Dbg( p_mux, "writing header" );
390 if( av_write_header( p_sys->oc ) < 0 )
392 msg_Err( p_mux, "could not write header" );
393 p_sys->b_write_header = VLC_FALSE;
394 p_sys->b_error = VLC_TRUE;
398 put_flush_packet( &p_sys->oc->pb );
399 p_sys->b_write_header = VLC_FALSE;
404 if( MuxGetStream( p_mux, &i_stream, 0 ) < 0 ) return VLC_SUCCESS;
405 MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
411 /*****************************************************************************
413 *****************************************************************************/
414 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
420 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
421 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
422 *pb_bool = VLC_FALSE;
425 case MUX_GET_ADD_STREAM_WAIT:
426 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
432 char **ppsz = (char**)va_arg( args, char ** );
433 *ppsz = strdup( p_mux->p_sys->oc->oformat->mime_type );
442 /*****************************************************************************
443 * I/O wrappers for libavformat
444 *****************************************************************************/
445 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
447 URLContext *p_url = opaque;
448 sout_mux_t *p_mux = p_url->priv_data;
451 #ifdef AVFORMAT_DEBUG
452 msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
455 block_t *p_buf = block_New( p_mux->p_sout, buf_size );
456 if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
458 if( p_mux->p_sys->b_write_header )
459 p_buf->i_flags |= BLOCK_FLAG_HEADER;
461 i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
462 return i_ret ? i_ret : -1;
465 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
467 URLContext *p_url = opaque;
468 sout_mux_t *p_mux = p_url->priv_data;
471 #ifdef AVFORMAT_DEBUG
472 msg_Dbg( p_mux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
486 if( sout_AccessOutSeek( p_mux->p_access, i_absolute ) )
494 #else /* HAVE_FFMPEG_AVFORMAT_H */
496 int E_(OpenMux)( vlc_object_t *p_this )
501 void E_(CloseMux)( vlc_object_t *p_this )
505 #endif /* HAVE_FFMPEG_AVFORMAT_H */