1 /*****************************************************************************
2 * mux.c: muxer using libavformat
3 *****************************************************************************
4 * Copyright (C) 2006 VLC authors and VideoLAN
7 * Authors: Gildas Bazin <gbazin@videolan.org>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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/avcommon.h"
44 //#define AVFORMAT_DEBUG 1
46 static const char *const ppsz_mux_options[] = {
47 "mux", "options", NULL
50 /*****************************************************************************
51 * mux_sys_t: mux descriptor
52 *****************************************************************************/
62 bool b_write_keyframe;
66 /*****************************************************************************
68 *****************************************************************************/
69 static int Control ( sout_mux_t *, int, va_list );
70 static int AddStream( sout_mux_t *, sout_input_t * );
71 static int DelStream( sout_mux_t *, sout_input_t * );
72 static int Mux ( sout_mux_t * );
74 static int IOWrite( void *opaque, uint8_t *buf, int buf_size );
75 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
77 /*****************************************************************************
79 *****************************************************************************/
80 int OpenMux( vlc_object_t *p_this )
82 AVOutputFormat *file_oformat;
83 sout_mux_t *p_mux = (sout_mux_t*)p_this;
84 sout_mux_sys_t *p_sys;
87 vlc_init_avformat(p_this);
89 config_ChainParse( p_mux, "sout-avformat-", ppsz_mux_options, p_mux->p_cfg );
91 /* Find the requested muxer */
92 psz_mux = var_GetNonEmptyString( p_mux, "sout-avformat-mux" );
95 file_oformat = av_guess_format( psz_mux, NULL, NULL );
101 av_guess_format( NULL, p_mux->p_access->psz_path, NULL);
105 msg_Err( p_mux, "unable for find a suitable output format" );
109 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
113 p_sys->oc = avformat_alloc_context();
114 p_sys->oc->oformat = file_oformat;
115 /* If we use dummy access, let avformat write output */
116 if( !strcmp( p_mux->p_access->psz_access, "dummy") )
117 strcpy( p_sys->oc->filename, p_mux->p_access->psz_path );
119 /* Create I/O wrapper */
120 p_sys->io_buffer_size = 10 * 1024 * 1024; /* FIXME */
121 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
124 if( sout_AccessOutControl( p_mux->p_access, ACCESS_OUT_CAN_SEEK, &b_can_seek ) )
126 p_sys->io = avio_alloc_context(
127 p_sys->io_buffer, p_sys->io_buffer_size,
128 1, p_mux, NULL, IOWrite, b_can_seek ? IOSeek : NULL );
130 p_sys->oc->pb = p_sys->io;
131 p_sys->oc->nb_streams = 0;
133 p_sys->b_write_header = true;
134 p_sys->b_write_keyframe = false;
135 p_sys->b_error = false;
137 /* Fill p_mux fields */
138 p_mux->pf_control = Control;
139 p_mux->pf_addstream = AddStream;
140 p_mux->pf_delstream = DelStream;
146 /*****************************************************************************
148 *****************************************************************************/
149 void CloseMux( vlc_object_t *p_this )
151 sout_mux_t *p_mux = (sout_mux_t*)p_this;
152 sout_mux_sys_t *p_sys = p_mux->p_sys;
154 if( !p_sys->b_write_header && !p_sys->b_error && av_write_trailer( p_sys->oc ) < 0 )
156 msg_Err( p_mux, "could not write trailer" );
159 avformat_free_context(p_sys->oc);
161 free( p_sys->io_buffer );
165 /*****************************************************************************
167 *****************************************************************************/
168 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
170 sout_mux_sys_t *p_sys = p_mux->p_sys;
171 es_format_t *fmt = p_input->p_fmt;
172 AVCodecContext *codec;
176 msg_Dbg( p_mux, "adding input" );
178 if( !GetFfmpegCodec( fmt->i_codec, 0, &i_codec_id, 0 ) )
180 msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
181 (char *)&fmt->i_codec );
185 unsigned opus_size[XIPH_MAX_HEADER_COUNT];
186 void *opus_packet[XIPH_MAX_HEADER_COUNT];
187 if( fmt->i_codec == VLC_CODEC_OPUS )
190 /* Only transmits the first packet (OpusHead) */
191 if( xiph_SplitHeaders(opus_size, opus_packet, &count, fmt->i_extra, fmt->p_extra ) ) {
194 if (count != 2 || opus_size[0] < 19) {
195 msg_Err(p_mux, "Invalid Opus header");
200 p_input->p_sys = malloc( sizeof( int ) );
201 *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
203 if( fmt->i_cat != VIDEO_ES && fmt->i_cat != AUDIO_ES)
205 msg_Warn( p_mux, "Unhandled ES category" );
209 stream = avformat_new_stream( p_sys->oc, NULL);
212 free( p_input->p_sys );
215 codec = stream->codec;
217 codec->opaque = p_mux;
222 codec->codec_type = AVMEDIA_TYPE_AUDIO;
223 codec->channels = fmt->audio.i_channels;
224 codec->sample_rate = fmt->audio.i_rate;
225 codec->time_base = (AVRational){1, codec->sample_rate};
226 codec->frame_size = fmt->audio.i_frame_length;
230 if( !fmt->video.i_frame_rate ||
231 !fmt->video.i_frame_rate_base )
233 msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
234 fmt->video.i_frame_rate = 25;
235 fmt->video.i_frame_rate_base = 1;
237 codec->codec_type = AVMEDIA_TYPE_VIDEO;
238 codec->width = fmt->video.i_width;
239 codec->height = fmt->video.i_height;
240 av_reduce( &codec->sample_aspect_ratio.num,
241 &codec->sample_aspect_ratio.den,
242 fmt->video.i_sar_num,
243 fmt->video.i_sar_den, 1 << 30 /* something big */ );
244 stream->sample_aspect_ratio.den = codec->sample_aspect_ratio.den;
245 stream->sample_aspect_ratio.num = codec->sample_aspect_ratio.num;
246 codec->time_base.den = fmt->video.i_frame_rate;
247 codec->time_base.num = fmt->video.i_frame_rate_base;
252 codec->bit_rate = fmt->i_bitrate;
253 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
254 if( !codec->codec_tag && i_codec_id == AV_CODEC_ID_MP2 )
256 i_codec_id = AV_CODEC_ID_MP3;
257 codec->codec_tag = av_codec_get_tag( p_sys->oc->oformat->codec_tag, i_codec_id );
259 codec->codec_id = i_codec_id;
263 if( fmt->i_codec == VLC_CODEC_OPUS )
265 codec->extradata_size = opus_size[0];
266 codec->extradata = av_malloc( opus_size[0] );
267 memcpy( codec->extradata, opus_packet[0], opus_size[0] );
271 codec->extradata_size = fmt->i_extra;
272 codec->extradata = av_malloc( fmt->i_extra );
273 memcpy( codec->extradata, fmt->p_extra, fmt->i_extra );
280 /*****************************************************************************
282 *****************************************************************************/
283 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
285 msg_Dbg( p_mux, "removing input" );
286 free( p_input->p_sys );
290 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
292 sout_mux_sys_t *p_sys = p_mux->p_sys;
293 block_t *p_data = block_FifoGet( p_input->p_fifo );
294 int i_stream = *((int *)p_input->p_sys);
295 AVStream *p_stream = p_sys->oc->streams[i_stream];
298 memset( &pkt, 0, sizeof(AVPacket) );
300 av_init_packet(&pkt);
301 pkt.data = p_data->p_buffer;
302 pkt.size = p_data->i_buffer;
303 pkt.stream_index = i_stream;
305 if( p_data->i_flags & BLOCK_FLAG_TYPE_I )
307 #ifdef AVFMT_ALLOW_FLUSH
308 /* Make sure we don't inadvertedly mark buffered data as keyframes. */
309 if( p_sys->oc->oformat->flags & AVFMT_ALLOW_FLUSH )
310 av_write_frame( p_sys->oc, NULL );
313 p_sys->b_write_keyframe = true;
314 pkt.flags |= AV_PKT_FLAG_KEY;
317 if( p_data->i_pts > 0 )
318 pkt.pts = p_data->i_pts * p_stream->time_base.den /
319 CLOCK_FREQ / p_stream->time_base.num;
320 if( p_data->i_dts > 0 )
321 pkt.dts = p_data->i_dts * p_stream->time_base.den /
322 CLOCK_FREQ / p_stream->time_base.num;
324 /* this is another hack to prevent libavformat from triggering the "non monotone timestamps" check in avformat/utils.c */
325 p_stream->cur_dts = ( p_data->i_dts * p_stream->time_base.den /
326 CLOCK_FREQ / p_stream->time_base.num ) - 1;
328 if( av_write_frame( p_sys->oc, &pkt ) < 0 )
330 msg_Err( p_mux, "could not write frame (pts: %"PRId64", dts: %"PRId64") "
331 "(pkt pts: %"PRId64", dts: %"PRId64")",
332 p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
333 block_Release( p_data );
337 block_Release( p_data );
341 /*****************************************************************************
342 * Mux: multiplex available data in input fifos
343 *****************************************************************************/
344 static int Mux( sout_mux_t *p_mux )
346 sout_mux_sys_t *p_sys = p_mux->p_sys;
348 if( p_sys->b_error ) return VLC_EGENERIC;
350 if( p_sys->b_write_header )
353 msg_Dbg( p_mux, "writing header" );
355 char *psz_opts = var_GetNonEmptyString( p_mux, "sout-avformat-options" );
356 AVDictionary *options = NULL;
357 if (psz_opts && *psz_opts)
358 options = vlc_av_get_options(psz_opts);
360 error = avformat_write_header( p_sys->oc, options ? &options : NULL);
361 AVDictionaryEntry *t = NULL;
362 while ((t = av_dict_get(options, "", t, AV_DICT_IGNORE_SUFFIX))) {
363 msg_Err( p_mux, "Unknown option \"%s\"", t->key );
365 av_dict_free(&options);
368 msg_Err( p_mux, "could not write header: %s",
369 vlc_strerror_c(AVUNERROR(error)) );
370 p_sys->b_write_header = false;
371 p_sys->b_error = true;
375 avio_flush( p_sys->oc->pb );
376 p_sys->b_write_header = false;
383 int i_stream = sout_MuxGetStream( p_mux, 1, &i_dts );
387 MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
393 /*****************************************************************************
395 *****************************************************************************/
396 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
402 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
403 pb_bool = (bool*)va_arg( args, bool * );
407 case MUX_GET_ADD_STREAM_WAIT:
408 pb_bool = (bool*)va_arg( args, bool * );
414 char **ppsz = (char**)va_arg( args, char ** );
415 *ppsz = strdup( p_mux->p_sys->oc->oformat->mime_type );
424 /*****************************************************************************
425 * I/O wrappers for libavformat
426 *****************************************************************************/
427 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
429 sout_mux_t *p_mux = opaque;
432 #ifdef AVFORMAT_DEBUG
433 msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
436 block_t *p_buf = block_Alloc( buf_size );
437 if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
439 if( p_mux->p_sys->b_write_header )
440 p_buf->i_flags |= BLOCK_FLAG_HEADER;
442 if( p_mux->p_sys->b_write_keyframe )
444 p_buf->i_flags |= BLOCK_FLAG_TYPE_I;
445 p_mux->p_sys->b_write_keyframe = false;
448 i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
449 return i_ret ? i_ret : -1;
452 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
454 sout_mux_t *p_mux = opaque;
456 #ifdef AVFORMAT_DEBUG
457 msg_Dbg( p_mux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
463 return sout_AccessOutSeek( p_mux->p_access, offset );