1 /*****************************************************************************
2 * encoder.c: video and audio encoder using the ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: encoder.c,v 1.1 2003/10/27 01:04:38 gbazin Exp $
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@netcourrier.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
34 #include <vlc/decoder.h>
35 #include <vlc/input.h>
38 #include "aout_internal.h"
41 #ifdef HAVE_FFMPEG_AVCODEC_H
42 # include <ffmpeg/avcodec.h>
49 #define AVCODEC_MAX_VIDEO_FRAME_SIZE (3*1024*1024)
51 /*****************************************************************************
53 *****************************************************************************/
54 int E_(OpenVideoEncoder) ( vlc_object_t * );
55 void E_(CloseVideoEncoder)( vlc_object_t * );
57 int E_(OpenAudioEncoder) ( vlc_object_t * );
58 void E_(CloseAudioEncoder)( vlc_object_t * );
60 static block_t *EncodeVideo( encoder_t *, picture_t * );
61 static block_t *EncodeAudio( encoder_t *, aout_buffer_t * );
63 /*****************************************************************************
64 * encoder_sys_t : ffmpeg encoder descriptor
65 *****************************************************************************/
72 AVCodecContext *p_context;
75 * Packetizer output properties
77 sout_packetizer_input_t *p_sout_input;
78 sout_format_t sout_format;
83 int i_last_block_size;
87 mtime_t i_last_ref_pts;
88 mtime_t i_buggy_pts_detect;
96 /*****************************************************************************
97 * OpenVideoEncoder: probe the encoder
98 *****************************************************************************/
99 int E_(OpenVideoEncoder)( vlc_object_t *p_this )
101 encoder_t *p_enc = (encoder_t *)p_this;
102 encoder_sys_t *p_sys = p_enc->p_sys;
103 AVCodecContext *p_context;
108 i_ff_codec = E_(GetFfmpegCodec)( p_enc->i_fourcc, 0, 0, 0 );
114 p_codec = avcodec_find_encoder( i_ff_codec );
120 /* libavcodec needs to be initialized */
121 E_(InitLibavcodec)(p_this);
123 /* Allocate the memory needed to store the decoder's structure */
124 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
126 msg_Err( p_enc, "out of memory" );
129 p_enc->p_sys = p_sys;
130 p_sys->p_codec = p_codec;
132 p_enc->pf_header = NULL;
133 p_enc->pf_encode_video = EncodeVideo;
134 p_enc->format.video.i_chroma = VLC_FOURCC('I','4','2','0');
136 if( p_enc->i_fourcc == VLC_FOURCC( 'm','p','1','v' ) ||
137 p_enc->i_fourcc == VLC_FOURCC( 'm','p','2','v' ) )
139 p_enc->i_fourcc = VLC_FOURCC( 'm','p','g','v' );
142 p_sys->p_context = p_context = avcodec_alloc_context();
143 p_context->width = p_enc->format.video.i_width;
144 p_context->height = p_enc->format.video.i_height;
145 p_context->bit_rate = p_enc->i_bitrate;
147 p_context->frame_rate = p_enc->i_frame_rate;
148 p_context->frame_rate_base= p_enc->i_frame_rate_base;
150 p_context->gop_size = p_enc->i_key_int >= 0 ? p_enc->i_key_int : 50;
151 p_context->max_b_frames =
152 __MIN( p_enc->i_b_frames, FF_MAX_B_FRAMES );
153 p_context->b_frame_strategy = 0;
154 p_context->b_quant_factor = 2.0;
156 if( p_enc->i_vtolerance >= 0 )
158 p_context->bit_rate_tolerance = p_enc->i_vtolerance;
160 p_context->qmin = p_enc->i_qmin;
161 p_context->qmax = p_enc->i_qmax;
163 #if LIBAVCODEC_BUILD >= 4673
164 p_context->mb_decision = p_enc->i_hq;
168 p_context->flags |= CODEC_FLAG_HQ;
172 if( i_ff_codec == CODEC_ID_RAWVIDEO )
174 p_context->pix_fmt = E_(GetFfmpegChroma)( p_enc->i_fourcc );
177 /* Make sure we get extradata filled by the encoder */
178 p_context->extradata_size = 0;
179 p_context->extradata = NULL;
180 p_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
182 if( avcodec_open( p_context, p_sys->p_codec ) )
184 msg_Err( p_enc, "cannot open encoder" );
188 p_enc->i_extra_data = p_context->extradata_size;
189 p_enc->p_extra_data = p_context->extradata;
190 p_context->flags &= ~CODEC_FLAG_GLOBAL_HEADER;
192 p_sys->p_buffer_out = malloc( AVCODEC_MAX_VIDEO_FRAME_SIZE );
193 p_sys->i_last_ref_pts = 0;
194 p_sys->i_buggy_pts_detect = 0;
199 /****************************************************************************
200 * EncodeVideo: the whole thing
201 ****************************************************************************/
202 static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pict )
204 encoder_sys_t *p_sys = p_enc->p_sys;
208 for( i_plane = 0; i_plane < p_pict->i_planes; i_plane++ )
210 frame.data[i_plane] = p_pict->p[i_plane].p_pixels;
211 frame.linesize[i_plane] = p_pict->p[i_plane].i_pitch;
214 frame.pts = p_pict->date;
216 /* Let ffmpeg select the frame type */
219 i_out = avcodec_encode_video( p_sys->p_context, p_sys->p_buffer_out,
220 AVCODEC_MAX_VIDEO_FRAME_SIZE, &frame );
223 block_t *p_block = block_New( p_enc, i_out );
224 memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
226 if( p_sys->p_context->coded_frame->pts != 0 &&
227 p_sys->i_buggy_pts_detect != p_sys->p_context->coded_frame->pts )
229 p_sys->i_buggy_pts_detect = p_sys->p_context->coded_frame->pts;
231 /* FIXME, 3-2 pulldown is not handled correctly */
232 p_block->i_length = 0;//in->i_length;
233 p_block->i_pts = p_sys->p_context->coded_frame->pts;
235 if( !p_sys->p_context->delay ||
236 ( p_sys->p_context->coded_frame->pict_type != FF_I_TYPE &&
237 p_sys->p_context->coded_frame->pict_type != FF_P_TYPE ) )
239 p_block->i_dts = p_block->i_pts;
243 if( p_sys->i_last_ref_pts )
245 p_block->i_dts = p_sys->i_last_ref_pts;
249 /* Let's put something sensible */
250 p_block->i_dts = p_block->i_pts;
253 p_sys->i_last_ref_pts = p_block->i_pts;
258 /* Buggy libavcodec which doesn't update coded_frame->pts
260 p_block->i_length = 0;//in->i_length;
261 p_block->i_dts = p_block->i_pts = p_pict->date;
270 /*****************************************************************************
271 * CloseVideoEncoder: ffmpeg video encoder destruction
272 *****************************************************************************/
273 void E_(CloseVideoEncoder)( vlc_object_t *p_this )
275 encoder_t *p_enc = (encoder_t *)p_this;
276 encoder_sys_t *p_sys = p_enc->p_sys;
278 avcodec_close( p_sys->p_context );
279 free( p_sys->p_context );
280 free( p_sys->p_buffer_out );
284 /*****************************************************************************
285 * OpenAudioEncoder: probe the encoder
286 *****************************************************************************/
287 int E_(OpenAudioEncoder)( vlc_object_t *p_this )
289 encoder_t *p_enc = (encoder_t *)p_this;
290 encoder_sys_t *p_sys = p_enc->p_sys;
291 AVCodecContext *p_context;
295 i_ff_codec = E_(GetFfmpegCodec)( p_enc->i_fourcc, 0, 0, 0 );
296 if( i_ff_codec == 0 )
298 msg_Err( p_enc, "cannot find encoder id" );
302 p_codec = avcodec_find_encoder( i_ff_codec );
305 msg_Err( p_enc, "cannot find encoder (avcodec)" );
309 /* libavcodec needs to be initialized */
310 E_(InitLibavcodec)(p_this);
312 /* Allocate the memory needed to store the decoder's structure */
313 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
315 msg_Err( p_enc, "out of memory" );
318 p_enc->p_sys = p_sys;
319 p_sys->p_codec = p_codec;
321 p_enc->pf_header = NULL;
322 p_enc->pf_encode_audio = EncodeAudio;
323 p_enc->format.audio.i_format = VLC_FOURCC('s','1','6','n');
325 p_sys->p_context = p_context = avcodec_alloc_context();
326 p_context->bit_rate = p_enc->i_bitrate;
327 p_context->sample_rate = p_enc->format.audio.i_rate;
328 p_context->channels =
329 aout_FormatNbChannels( &p_enc->format.audio );
331 /* Make sure we get extradata filled by the encoder */
332 p_context->extradata_size = 0;
333 p_context->extradata = NULL;
334 p_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
336 p_sys->i_samples_delay = 0;
337 p_sys->i_last_block_size = 0;
340 if( avcodec_open( p_context, p_sys->p_codec ) )
343 if( p_context->channels > 2 )
345 p_context->channels = 2;
346 id->f_dst.i_channels = 2;
347 if( avcodec_open( id->ff_enc_c, id->ff_enc ) )
349 msg_Err( p_enc, "cannot open encoder" );
352 msg_Warn( p_enc, "stereo mode selected (codec limitation)" );
356 msg_Err( p_enc, "cannot open encoder" );
362 p_enc->i_extra_data = p_context->extradata_size;
363 p_enc->p_extra_data = p_context->extradata;
364 p_context->flags &= ~CODEC_FLAG_GLOBAL_HEADER;
366 p_sys->p_buffer = malloc( p_context->frame_size * 2 *
367 p_context->channels * 2 );
369 p_sys->p_buffer_out = malloc( 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE );
371 p_sys->i_frame_size = p_sys->p_context->frame_size * 2 *
374 /* Hack for mp3 transcoding support */
375 if( p_enc->i_fourcc == VLC_FOURCC( 'm','p','3',' ' ) )
377 p_enc->i_fourcc = VLC_FOURCC( 'm','p','g','a' );
383 /****************************************************************************
384 * EncodeAudio: the whole thing
385 ****************************************************************************/
386 static block_t *EncodeAudio( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
388 encoder_sys_t *p_sys = p_enc->p_sys;
389 block_t *p_block, *p_chain = NULL;
390 char *p_buffer = p_aout_buf->p_buffer;
391 int i_samples = p_aout_buf->i_nb_samples;
392 int i_samples_delay = p_sys->i_samples_delay;
394 p_sys->i_pts = p_aout_buf->start_date -
395 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
396 (mtime_t)p_enc->format.audio.i_rate;
398 p_sys->i_samples_delay += i_samples;
400 while( p_sys->i_samples_delay >= p_sys->p_context->frame_size )
405 if( i_samples_delay )
407 /* Take care of the left-over from last time */
408 int i_delay_size = i_samples_delay * 2 *
409 p_sys->p_context->channels;
410 int i_size = p_sys->i_frame_size - i_delay_size;
412 p_samples = (int16_t *)p_sys->p_buffer;
413 memcpy( p_sys->p_buffer + i_delay_size, p_buffer, i_size );
414 p_buffer -= i_delay_size;
415 i_samples += i_samples_delay;
420 p_samples = (int16_t *)p_buffer;
423 i_out = avcodec_encode_audio( p_sys->p_context, p_sys->p_buffer_out,
424 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE,
431 p_buffer += p_sys->i_frame_size;
432 p_sys->i_samples_delay -= p_sys->p_context->frame_size;
433 i_samples = p_sys->p_context->frame_size;
435 p_block = block_New( p_enc, i_out );
436 memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
438 p_block->i_length = (mtime_t)1000000 *
439 (mtime_t)p_sys->p_context->frame_size /
440 (mtime_t)p_sys->p_context->sample_rate;
442 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
445 p_sys->i_pts += p_block->i_length;
446 block_ChainAppend( &p_chain, p_block );
449 /* Backup the remaining raw samples */
450 if( p_sys->i_samples_delay > 0 )
452 memcpy( p_sys->p_buffer, p_buffer + i_samples_delay,
453 i_samples * 2 * p_sys->p_context->channels );
459 /*****************************************************************************
460 * CloseAudioEncoder: ffmpeg audio encoder destruction
461 *****************************************************************************/
462 void E_(CloseAudioEncoder)( vlc_object_t *p_this )
464 encoder_t *p_enc = (encoder_t *)p_this;
465 encoder_sys_t *p_sys = p_enc->p_sys;
467 avcodec_close( p_sys->p_context );
468 free( p_sys->p_context );
469 free( p_sys->p_buffer );
470 free( p_sys->p_buffer_out );