1 /*****************************************************************************
2 * mux.c: muxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2006 VideoLAN
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/input.h>
34 #ifdef HAVE_FFMPEG_AVFORMAT_H
35 # include <ffmpeg/avformat.h>
37 # include <avformat.h>
42 //#define AVFORMAT_DEBUG 1
44 /* Version checking */
45 #if (LIBAVFORMAT_BUILD >= 4687) && (defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE))
47 /*****************************************************************************
48 * mux_sys_t: mux descriptor
49 *****************************************************************************/
60 vlc_bool_t b_write_header;
63 int64_t i_initial_dts;
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 offset_t IOSeek( void *opaque, offset_t offset, int whence );
77 /*****************************************************************************
79 *****************************************************************************/
80 int E_(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;
85 AVFormatParameters params, *ap = ¶ms;
87 /* Should we call it only once ? */
90 /* Find the requested muxer */
92 guess_format(NULL, p_mux->p_access->psz_name, NULL);
95 msg_Err( p_mux, "unable for find a suitable output format" );
99 /* Fill p_mux fields */
100 p_mux->pf_control = Control;
101 p_mux->pf_addstream = AddStream;
102 p_mux->pf_delstream = DelStream;
104 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
106 p_sys->oc = av_alloc_format_context();
107 p_sys->oc->oformat = file_oformat;
109 /* Create I/O wrapper */
110 p_sys->io_buffer_size = 32768; /* FIXME */
111 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
112 p_sys->url.priv_data = p_mux;
113 p_sys->url.prot = &p_sys->prot;
114 p_sys->url.prot->name = "VLC I/O wrapper";
115 p_sys->url.prot->url_open = 0;
116 p_sys->url.prot->url_read = 0;
117 p_sys->url.prot->url_write =
118 (int (*) (URLContext *, unsigned char *, int))IOWrite;
119 p_sys->url.prot->url_seek =
120 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
121 p_sys->url.prot->url_close = 0;
122 p_sys->url.prot->next = 0;
123 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
124 1, &p_sys->url, NULL, IOWrite, IOSeek );
126 memset( ap, 0, sizeof(*ap) );
127 if( av_set_parameters( p_sys->oc, ap ) < 0 )
129 msg_Err( p_mux, "invalid encoding parameters" );
130 av_free( p_sys->oc );
131 free( p_sys->io_buffer );
136 p_sys->oc->pb = p_sys->io;
137 p_sys->oc->nb_streams = 0;
139 p_sys->b_write_header = VLC_TRUE;
140 p_sys->b_error = VLC_FALSE;
141 p_sys->i_initial_dts = 0;
146 /*****************************************************************************
148 *****************************************************************************/
149 void E_(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;
155 if( av_write_trailer( p_sys->oc ) < 0 )
157 msg_Err( p_mux, "could not write trailer" );
160 for( i = 0 ; i < p_sys->oc->nb_streams; i++ )
162 if( p_sys->oc->streams[i]->codec->extradata )
163 av_free( p_sys->oc->streams[i]->codec->extradata );
164 av_free( p_sys->oc->streams[i]->codec );
165 av_free( p_sys->oc->streams[i] );
167 av_free( p_sys->oc );
169 free( p_sys->io_buffer );
173 /*****************************************************************************
175 *****************************************************************************/
176 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
178 sout_mux_sys_t *p_sys = p_mux->p_sys;
179 AVCodecContext *codec;
181 int i_codec_id, i_aspect_num, i_aspect_den;
183 msg_Dbg( p_mux, "adding input" );
185 if( !E_(GetFfmpegCodec)( p_input->p_fmt->i_codec, 0, &i_codec_id, 0 ) )
187 msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
188 (char *)&p_input->p_fmt->i_codec );
192 p_input->p_sys = malloc( sizeof( int ) );
193 *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
195 stream = av_new_stream( p_sys->oc, p_sys->oc->nb_streams);
198 free( p_input->p_sys );
201 codec = stream->codec;
203 switch( p_input->p_fmt->i_cat )
206 codec->codec_type = CODEC_TYPE_AUDIO;
207 codec->channels = p_input->p_fmt->audio.i_channels;
208 codec->sample_rate = p_input->p_fmt->audio.i_rate;
209 codec->time_base = (AVRational){1, codec->sample_rate};
213 if( !p_input->p_fmt->video.i_frame_rate ||
214 !p_input->p_fmt->video.i_frame_rate_base )
216 msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
217 p_input->p_fmt->video.i_frame_rate = 25;
218 p_input->p_fmt->video.i_frame_rate_base = 1;
220 codec->codec_type = CODEC_TYPE_VIDEO;
221 codec->width = p_input->p_fmt->video.i_width;
222 codec->height = p_input->p_fmt->video.i_height;
223 av_reduce( &i_aspect_num, &i_aspect_den,
224 p_input->p_fmt->video.i_aspect,
225 VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
226 av_reduce( &codec->sample_aspect_ratio.num,
227 &codec->sample_aspect_ratio.den,
228 i_aspect_num * (int64_t)codec->height,
229 i_aspect_den * (int64_t)codec->width, 1 << 30 );
230 codec->time_base.den = p_input->p_fmt->video.i_frame_rate;
231 codec->time_base.num = p_input->p_fmt->video.i_frame_rate_base;
235 codec->bit_rate = p_input->p_fmt->i_bitrate;
236 codec->codec_tag = p_input->p_fmt->i_codec;
237 codec->codec_id = i_codec_id;
239 if( p_input->p_fmt->i_extra )
241 codec->extradata_size = p_input->p_fmt->i_extra;
242 codec->extradata = av_malloc( p_input->p_fmt->i_extra );
243 memcpy( codec->extradata, p_input->p_fmt->p_extra,
244 p_input->p_fmt->i_extra );
250 /*****************************************************************************
252 *****************************************************************************/
253 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
255 msg_Dbg( p_mux, "removing input" );
256 free( p_input->p_sys );
261 * TODO move this function to src/stream_output.c (used by nearly all muxers)
263 static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
268 for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
270 block_fifo_t *p_fifo;
272 p_fifo = p_mux->pp_inputs[i]->p_fifo;
274 /* We don't really need to have anything in the SPU fifo */
275 if( p_mux->pp_inputs[i]->p_fmt->i_cat == SPU_ES &&
276 p_fifo->i_depth == 0 ) continue;
278 if( p_fifo->i_depth )
282 p_buf = block_FifoShow( p_fifo );
283 if( i_stream < 0 || p_buf->i_dts < i_dts )
285 i_dts = p_buf->i_dts;
292 if( pi_stream ) *pi_stream = i_stream;
293 if( pi_dts ) *pi_dts = i_dts;
294 if( !p_mux->p_sys->i_initial_dts ) p_mux->p_sys->i_initial_dts = i_dts;
298 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
300 sout_mux_sys_t *p_sys = p_mux->p_sys;
301 block_t *p_data = block_FifoGet( p_input->p_fifo );
302 int i_stream = *((int *)p_input->p_sys);
303 AVStream *p_stream = p_sys->oc->streams[i_stream];
306 av_init_packet(&pkt);
307 pkt.data = p_data->p_buffer;
308 pkt.size = p_data->i_buffer;
309 pkt.stream_index = i_stream;
311 if( p_data->i_flags & BLOCK_FLAG_TYPE_I ) pkt.flags |= PKT_FLAG_KEY;
313 /* avformat expects pts/dts which start from 0 */
314 p_data->i_dts -= p_mux->p_sys->i_initial_dts;
315 p_data->i_pts -= p_mux->p_sys->i_initial_dts;
317 if( p_data->i_pts > 0 )
318 pkt.pts = p_data->i_pts * p_stream->time_base.den /
319 I64C(1000000) / 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 I64C(1000000) / p_stream->time_base.num;
324 if( av_write_frame( p_sys->oc, &pkt ) < 0 )
326 msg_Err( p_mux, "could not write frame (pts: "I64Fd", dts: "I64Fd") "
327 "(pkt pts: "I64Fd", dts: "I64Fd")",
328 p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
329 block_Release( p_data );
333 block_Release( p_data );
337 /*****************************************************************************
338 * Mux: multiplex available data in input fifos
339 *****************************************************************************/
340 static int Mux( sout_mux_t *p_mux )
342 sout_mux_sys_t *p_sys = p_mux->p_sys;
345 if( p_sys->b_error ) return VLC_EGENERIC;
347 if( p_sys->b_write_header )
349 msg_Dbg( p_mux, "writing header" );
351 p_sys->b_write_header = VLC_FALSE;
353 if( av_write_header( p_sys->oc ) < 0 )
355 msg_Err( p_mux, "could not write header" );
356 p_sys->b_error = VLC_TRUE;
363 if( MuxGetStream( p_mux, &i_stream, 0 ) < 0 ) return VLC_SUCCESS;
364 MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
370 /*****************************************************************************
372 *****************************************************************************/
373 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
379 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
380 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
381 *pb_bool = VLC_FALSE;
384 case MUX_GET_ADD_STREAM_WAIT:
385 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
395 /*****************************************************************************
396 * I/O wrappers for libavformat
397 *****************************************************************************/
398 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
400 URLContext *p_url = opaque;
401 sout_mux_t *p_mux = p_url->priv_data;
404 #ifdef AVFORMAT_DEBUG
405 msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
408 block_t *p_buf = block_New( p_mux->p_sout, buf_size );
409 if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
411 i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
412 return i_ret ? i_ret : -1;
415 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
417 URLContext *p_url = opaque;
418 sout_mux_t *p_mux = p_url->priv_data;
421 #ifdef AVFORMAT_DEBUG
422 msg_Dbg( p_mux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
436 if( sout_AccessOutSeek( p_mux->p_access, i_absolute ) )
444 #else /* LIBAVFORMAT_BUILD >= 4687 */
446 int E_(OpenMux)( vlc_object_t *p_this )
451 void E_(CloseMux)( vlc_object_t *p_this )
455 #endif /* LIBAVFORMAT_BUILD >= 4687 */