1 /*****************************************************************************
2 * encoder.c: video and audio encoder using the ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: encoder.c,v 1.5 2003/11/05 18:59:01 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;
83 mtime_t i_last_ref_pts;
84 mtime_t i_buggy_pts_detect;
94 /*****************************************************************************
95 * OpenVideoEncoder: probe the encoder
96 *****************************************************************************/
97 int E_(OpenVideoEncoder)( vlc_object_t *p_this )
99 encoder_t *p_enc = (encoder_t *)p_this;
100 encoder_sys_t *p_sys = p_enc->p_sys;
101 AVCodecContext *p_context;
103 int i_codec_id, i_cat;
106 if( !E_(GetFfmpegCodec)( p_enc->i_fourcc, &i_cat, &i_codec_id,
112 if( i_cat != VIDEO_ES )
114 msg_Err( p_enc, "\"%s\" is not a video encoder", psz_namecodec );
118 /* Initialization must be done before avcodec_find_decoder() */
119 E_(InitLibavcodec)(p_this);
121 p_codec = avcodec_find_encoder( i_codec_id );
124 msg_Err( p_enc, "cannot find encoder %s", psz_namecodec );
128 /* Allocate the memory needed to store the decoder's structure */
129 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
131 msg_Err( p_enc, "out of memory" );
134 p_enc->p_sys = p_sys;
135 p_sys->p_codec = p_codec;
137 p_enc->pf_header = NULL;
138 p_enc->pf_encode_video = EncodeVideo;
139 p_enc->format.video.i_chroma = VLC_FOURCC('I','4','2','0');
141 if( p_enc->i_fourcc == VLC_FOURCC( 'm','p','1','v' ) ||
142 p_enc->i_fourcc == VLC_FOURCC( 'm','p','2','v' ) )
144 p_enc->i_fourcc = VLC_FOURCC( 'm','p','g','v' );
147 p_sys->p_context = p_context = avcodec_alloc_context();
148 p_context->width = p_enc->format.video.i_width;
149 p_context->height = p_enc->format.video.i_height;
150 p_context->bit_rate = p_enc->i_bitrate;
152 p_context->frame_rate = p_enc->i_frame_rate;
153 #if LIBAVCODEC_BUILD >= 4662
154 p_context->frame_rate_base= p_enc->i_frame_rate_base;
157 #if LIBAVCODEC_BUILD >= 4687
158 p_context->sample_aspect_ratio =
159 av_d2q( p_enc->i_aspect * p_context->height / p_context->width /
160 VOUT_ASPECT_FACTOR, 255 );
162 p_context->aspect_ratio = ((float)p_enc->i_aspect) / VOUT_ASPECT_FACTOR );
165 p_context->gop_size = p_enc->i_key_int >= 0 ? p_enc->i_key_int : 50;
166 p_context->max_b_frames =
167 __MIN( p_enc->i_b_frames, FF_MAX_B_FRAMES );
168 p_context->b_frame_strategy = 0;
169 p_context->b_quant_factor = 2.0;
171 if( p_enc->i_vtolerance >= 0 )
173 p_context->bit_rate_tolerance = p_enc->i_vtolerance;
175 p_context->qmin = p_enc->i_qmin;
176 p_context->qmax = p_enc->i_qmax;
178 #if LIBAVCODEC_BUILD >= 4673
179 p_context->mb_decision = p_enc->i_hq;
183 p_context->flags |= CODEC_FLAG_HQ;
187 if( i_codec_id == CODEC_ID_RAWVIDEO )
189 p_context->pix_fmt = E_(GetFfmpegChroma)( p_enc->i_fourcc );
192 /* Make sure we get extradata filled by the encoder */
193 p_context->extradata_size = 0;
194 p_context->extradata = NULL;
195 p_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
197 if( avcodec_open( p_context, p_sys->p_codec ) )
199 msg_Err( p_enc, "cannot open encoder" );
203 p_enc->i_extra_data = p_context->extradata_size;
204 p_enc->p_extra_data = p_context->extradata;
205 p_context->flags &= ~CODEC_FLAG_GLOBAL_HEADER;
207 p_sys->p_buffer_out = malloc( AVCODEC_MAX_VIDEO_FRAME_SIZE );
208 p_sys->i_last_ref_pts = 0;
209 p_sys->i_buggy_pts_detect = 0;
211 msg_Dbg( p_enc, "found encoder %s", psz_namecodec );
216 /****************************************************************************
217 * EncodeVideo: the whole thing
218 ****************************************************************************/
219 static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pict )
221 encoder_sys_t *p_sys = p_enc->p_sys;
225 for( i_plane = 0; i_plane < p_pict->i_planes; i_plane++ )
227 frame.data[i_plane] = p_pict->p[i_plane].p_pixels;
228 frame.linesize[i_plane] = p_pict->p[i_plane].i_pitch;
231 /* Set the pts of the frame being encoded (segfaults with mpeg4!)*/
232 if( p_enc->i_fourcc == VLC_FOURCC( 'm', 'p', 'g', 'v' ) )
233 frame.pts = p_pict->date;
237 /* Let ffmpeg select the frame type */
240 i_out = avcodec_encode_video( p_sys->p_context, p_sys->p_buffer_out,
241 AVCODEC_MAX_VIDEO_FRAME_SIZE, &frame );
244 block_t *p_block = block_New( p_enc, i_out );
245 memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
247 if( p_sys->p_context->coded_frame->pts != 0 &&
248 p_sys->i_buggy_pts_detect != p_sys->p_context->coded_frame->pts )
250 p_sys->i_buggy_pts_detect = p_sys->p_context->coded_frame->pts;
252 /* FIXME, 3-2 pulldown is not handled correctly */
253 p_block->i_length = I64C(1000000) * p_enc->i_frame_rate_base /
255 p_block->i_pts = p_sys->p_context->coded_frame->pts;
257 if( !p_sys->p_context->delay ||
258 ( p_sys->p_context->coded_frame->pict_type != FF_I_TYPE &&
259 p_sys->p_context->coded_frame->pict_type != FF_P_TYPE ) )
261 p_block->i_dts = p_block->i_pts;
265 if( p_sys->i_last_ref_pts )
267 p_block->i_dts = p_sys->i_last_ref_pts;
271 /* Let's put something sensible */
272 p_block->i_dts = p_block->i_pts;
275 p_sys->i_last_ref_pts = p_block->i_pts;
280 /* Buggy libavcodec which doesn't update coded_frame->pts
282 p_block->i_length = I64C(1000000) * p_enc->i_frame_rate_base /
284 p_block->i_dts = p_block->i_pts = p_pict->date;
293 /*****************************************************************************
294 * CloseVideoEncoder: ffmpeg video encoder destruction
295 *****************************************************************************/
296 void E_(CloseVideoEncoder)( vlc_object_t *p_this )
298 encoder_t *p_enc = (encoder_t *)p_this;
299 encoder_sys_t *p_sys = p_enc->p_sys;
301 avcodec_close( p_sys->p_context );
302 free( p_sys->p_context );
303 free( p_sys->p_buffer_out );
307 /*****************************************************************************
308 * OpenAudioEncoder: probe the encoder
309 *****************************************************************************/
310 int E_(OpenAudioEncoder)( vlc_object_t *p_this )
312 encoder_t *p_enc = (encoder_t *)p_this;
313 encoder_sys_t *p_sys;
314 AVCodecContext *p_context;
316 int i_codec_id, i_cat;
319 if( !E_(GetFfmpegCodec)( p_enc->i_fourcc, &i_cat, &i_codec_id,
325 if( i_cat != AUDIO_ES )
327 msg_Err( p_enc, "\"%s\" is not an audio encoder", psz_namecodec );
331 /* Initialization must be done before avcodec_find_decoder() */
332 E_(InitLibavcodec)(p_this);
334 p_codec = avcodec_find_encoder( i_codec_id );
337 msg_Err( p_enc, "cannot find encoder %s", psz_namecodec );
341 /* Allocate the memory needed to store the decoder's structure */
342 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
344 msg_Err( p_enc, "out of memory" );
347 p_enc->p_sys = p_sys;
348 p_sys->p_codec = p_codec;
350 p_enc->pf_header = NULL;
351 p_enc->pf_encode_audio = EncodeAudio;
352 p_enc->format.audio.i_format = VLC_FOURCC('s','1','6','n');
354 p_sys->p_context = p_context = avcodec_alloc_context();
355 p_context->bit_rate = p_enc->i_bitrate;
356 p_context->sample_rate = p_enc->format.audio.i_rate;
357 p_context->channels =
358 aout_FormatNbChannels( &p_enc->format.audio );
360 /* Make sure we get extradata filled by the encoder */
361 p_context->extradata_size = 0;
362 p_context->extradata = NULL;
363 p_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
365 if( avcodec_open( p_context, p_codec ) < 0 )
367 if( p_context->channels > 2 )
369 p_context->channels = 2;
370 //id->f_dst.i_channels = 2;
371 if( avcodec_open( p_context, p_codec ) < 0 )
373 msg_Err( p_enc, "cannot open encoder" );
376 msg_Warn( p_enc, "stereo mode selected (codec limitation)" );
380 msg_Err( p_enc, "cannot open encoder" );
385 p_enc->i_extra_data = p_context->extradata_size;
386 p_enc->p_extra_data = p_context->extradata;
387 p_context->flags &= ~CODEC_FLAG_GLOBAL_HEADER;
389 p_sys->i_frame_size = p_context->frame_size * 2 * p_context->channels;
390 p_sys->p_buffer = malloc( p_sys->i_frame_size );
391 p_sys->p_buffer_out = malloc( 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE );
393 msg_Warn( p_enc, "avcodec_setup_audio: %d %d %d %d",
394 p_context->frame_size, p_context->bit_rate, p_context->channels,
395 p_context->sample_rate );
397 p_sys->i_samples_delay = 0;
400 msg_Dbg( p_enc, "found encoder %s", psz_namecodec );
405 /****************************************************************************
406 * EncodeAudio: the whole thing
407 ****************************************************************************/
408 static block_t *EncodeAudio( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
410 encoder_sys_t *p_sys = p_enc->p_sys;
411 block_t *p_block, *p_chain = NULL;
413 char *p_buffer = p_aout_buf->p_buffer;
414 int i_samples = p_aout_buf->i_nb_samples;
415 int i_samples_delay = p_sys->i_samples_delay;
417 p_sys->i_pts = p_aout_buf->start_date -
418 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
419 (mtime_t)p_enc->format.audio.i_rate;
421 p_sys->i_samples_delay += i_samples;
423 while( p_sys->i_samples_delay >= p_sys->p_context->frame_size )
428 if( i_samples_delay )
430 /* Take care of the left-over from last time */
431 int i_delay_size = i_samples_delay * 2 *
432 p_sys->p_context->channels;
433 int i_size = p_sys->i_frame_size - i_delay_size;
435 p_samples = (int16_t *)p_sys->p_buffer;
436 memcpy( p_sys->p_buffer + i_delay_size, p_buffer, i_size );
437 p_buffer -= i_delay_size;
438 i_samples += i_samples_delay;
443 p_samples = (int16_t *)p_buffer;
446 i_out = avcodec_encode_audio( p_sys->p_context, p_sys->p_buffer_out,
447 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE,
451 msg_Warn( p_enc, "avcodec_encode_audio: %d", i_out );
453 if( i_out < 0 ) break;
455 p_buffer += p_sys->i_frame_size;
456 p_sys->i_samples_delay -= p_sys->p_context->frame_size;
457 i_samples -= p_sys->p_context->frame_size;
459 if( i_out == 0 ) continue;
461 p_block = block_New( p_enc, i_out );
462 memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
464 p_block->i_length = (mtime_t)1000000 *
465 (mtime_t)p_sys->p_context->frame_size /
466 (mtime_t)p_sys->p_context->sample_rate;
468 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
471 p_sys->i_pts += p_block->i_length;
472 block_ChainAppend( &p_chain, p_block );
475 /* Backup the remaining raw samples */
478 memcpy( p_sys->p_buffer, p_buffer + i_samples_delay * 2 *
479 p_sys->p_context->channels,
480 i_samples * 2 * p_sys->p_context->channels );
486 /*****************************************************************************
487 * CloseAudioEncoder: ffmpeg audio encoder destruction
488 *****************************************************************************/
489 void E_(CloseAudioEncoder)( vlc_object_t *p_this )
491 encoder_t *p_enc = (encoder_t *)p_this;
492 encoder_sys_t *p_sys = p_enc->p_sys;
494 avcodec_close( p_sys->p_context );
495 free( p_sys->p_context );
496 free( p_sys->p_buffer );
497 free( p_sys->p_buffer_out );