1 /*****************************************************************************
2 * encoder.c: video and audio encoder using the ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: encoder.c,v 1.11 2003/11/28 10:36:58 massiot 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 *****************************************************************************/
31 #include <vlc/decoder.h>
34 #ifdef HAVE_FFMPEG_AVCODEC_H
35 # include <ffmpeg/avcodec.h>
42 #define AVCODEC_MAX_VIDEO_FRAME_SIZE (3*1024*1024)
43 #define HURRY_UP_GUARD (200000)
45 /*****************************************************************************
47 *****************************************************************************/
48 int E_(OpenEncoder) ( vlc_object_t * );
49 void E_(CloseEncoder)( vlc_object_t * );
51 static block_t *EncodeVideo( encoder_t *, picture_t * );
52 static block_t *EncodeAudio( encoder_t *, aout_buffer_t * );
54 /*****************************************************************************
55 * encoder_sys_t : ffmpeg encoder descriptor
56 *****************************************************************************/
63 AVCodecContext *p_context;
74 mtime_t i_last_ref_pts;
75 mtime_t i_buggy_pts_detect;
85 /*****************************************************************************
86 * OpenEncoder: probe the encoder
87 *****************************************************************************/
88 int E_(OpenEncoder)( vlc_object_t *p_this )
90 encoder_t *p_enc = (encoder_t *)p_this;
91 encoder_sys_t *p_sys = p_enc->p_sys;
92 AVCodecContext *p_context;
94 int i_codec_id, i_cat;
97 if( !E_(GetFfmpegCodec)( p_enc->fmt_out.i_codec, &i_cat, &i_codec_id,
103 if( p_enc->fmt_out.i_cat == VIDEO_ES && i_cat != VIDEO_ES )
105 msg_Err( p_enc, "\"%s\" is not a video encoder", psz_namecodec );
109 if( p_enc->fmt_out.i_cat == AUDIO_ES && i_cat != AUDIO_ES )
111 msg_Err( p_enc, "\"%s\" is not an audio encoder", psz_namecodec );
115 /* Initialization must be done before avcodec_find_decoder() */
116 E_(InitLibavcodec)(p_this);
118 p_codec = avcodec_find_encoder( i_codec_id );
121 msg_Err( p_enc, "cannot find encoder %s", psz_namecodec );
125 /* Allocate the memory needed to store the decoder's structure */
126 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
128 msg_Err( p_enc, "out of memory" );
131 p_enc->p_sys = p_sys;
132 p_sys->p_codec = p_codec;
134 p_enc->pf_encode_video = EncodeVideo;
135 p_enc->pf_encode_audio = EncodeAudio;
137 p_sys->p_buffer_out = NULL;
138 p_sys->p_buffer = NULL;
140 p_sys->p_context = p_context = avcodec_alloc_context();
142 /* Set CPU capabilities */
144 p_context->dsp_mask = 0;
145 if( p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_MMX )
147 p_context->dsp_mask &= FF_MM_MMX;
149 if( p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_MMXEXT )
151 p_context->dsp_mask &= FF_MM_MMXEXT;
153 if( p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_3DNOW )
155 p_context->dsp_mask &= FF_MM_3DNOW;
157 if( p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_SSE )
159 p_context->dsp_mask &= FF_MM_SSE;
160 p_context->dsp_mask &= FF_MM_SSE2; /* FIXME */
162 /* Hack to make sure everything can be disabled **/
163 p_context->dsp_mask &= (FF_MM_FORCE >> 1);
166 /* Make sure we get extradata filled by the encoder */
167 p_context->extradata_size = 0;
168 p_context->extradata = NULL;
169 p_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
171 if( p_enc->fmt_in.i_cat == VIDEO_ES )
173 p_context->width = p_enc->fmt_in.video.i_width;
174 p_context->height = p_enc->fmt_in.video.i_height;
176 p_context->frame_rate = p_enc->fmt_in.video.i_frame_rate;
177 #if LIBAVCODEC_BUILD >= 4662
178 p_context->frame_rate_base= p_enc->fmt_in.video.i_frame_rate_base;
181 #if LIBAVCODEC_BUILD >= 4687
182 p_context->sample_aspect_ratio =
183 av_d2q( p_enc->fmt_in.video.i_aspect * p_context->height /
184 p_context->width / VOUT_ASPECT_FACTOR, 255 );
186 p_context->aspect_ratio = ((float)p_enc->fmt_in.video.i_aspect) /
190 p_sys->p_buffer_out = malloc( AVCODEC_MAX_VIDEO_FRAME_SIZE );
192 /* Ffmpeg does handle the conversion itself */
193 //p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
195 if ( p_enc->b_strict_rc )
197 p_context->rc_max_rate = p_enc->fmt_out.i_bitrate;
198 p_context->rc_buffer_size = p_context->bit_rate / 2;
199 p_context->rc_buffer_aggressivity = 1000.0; /* FIXME */
202 if ( p_enc->b_pre_me )
204 p_context->pre_me = 1;
205 p_context->me_pre_cmp = FF_CMP_CHROMA;
208 else if( p_enc->fmt_in.i_cat == AUDIO_ES )
210 p_enc->fmt_in.i_codec = AOUT_FMT_S16_NE;
211 p_context->sample_rate = p_enc->fmt_in.audio.i_rate;
212 p_context->channels = p_enc->fmt_in.audio.i_channels;
213 p_sys->i_frame_size = p_context->frame_size * 2 * p_context->channels;
214 p_sys->p_buffer = malloc( p_sys->i_frame_size );
215 p_sys->p_buffer_out = malloc( 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE );
218 /* Misc parameters */
219 p_context->bit_rate = p_enc->fmt_out.i_bitrate;
220 p_context->gop_size = p_enc->i_key_int > 0 ? p_enc->i_key_int : 50;
221 p_context->max_b_frames =
222 __MIN( p_enc->i_b_frames, FF_MAX_B_FRAMES );
223 p_context->b_frame_strategy = 0;
224 p_context->b_quant_factor = 2.0;
226 if( p_enc->i_vtolerance > 0 )
228 p_context->bit_rate_tolerance = p_enc->i_vtolerance;
230 p_context->qmin = p_enc->i_qmin;
231 p_context->qmax = p_enc->i_qmax;
233 #if LIBAVCODEC_BUILD >= 4673
234 p_context->mb_decision = p_enc->i_hq;
238 p_context->flags |= CODEC_FLAG_HQ;
242 if( i_codec_id == CODEC_ID_RAWVIDEO )
244 p_context->pix_fmt = E_(GetFfmpegChroma)( p_enc->fmt_in.i_codec );
247 /* Make sure we get extradata filled by the encoder */
248 p_context->extradata_size = 0;
249 p_context->extradata = NULL;
250 p_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
252 if( avcodec_open( p_context, p_codec ) )
254 if( p_enc->fmt_in.i_cat == AUDIO_ES && p_context->channels > 2 )
256 p_context->channels = 2;
257 p_enc->fmt_in.audio.i_channels = 2; // FIXME
258 if( avcodec_open( p_context, p_codec ) )
260 msg_Err( p_enc, "cannot open encoder" );
263 msg_Warn( p_enc, "stereo mode selected (codec limitation)" );
267 msg_Err( p_enc, "cannot open encoder" );
272 p_enc->fmt_out.i_extra = p_context->extradata_size;
273 p_enc->fmt_out.p_extra = p_context->extradata;
274 p_context->flags &= ~CODEC_FLAG_GLOBAL_HEADER;
276 if( p_enc->fmt_in.i_cat == AUDIO_ES )
278 p_sys->i_frame_size = p_context->frame_size * 2 * p_context->channels;
279 p_sys->p_buffer = malloc( p_sys->i_frame_size );
282 p_sys->i_last_ref_pts = 0;
283 p_sys->i_buggy_pts_detect = 0;
284 p_sys->i_samples_delay = 0;
287 msg_Dbg( p_enc, "found encoder %s", psz_namecodec );
292 /****************************************************************************
293 * EncodeVideo: the whole thing
294 ****************************************************************************/
295 static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pict )
297 encoder_sys_t *p_sys = p_enc->p_sys;
300 vlc_bool_t b_hurry_up;
302 for( i_plane = 0; i_plane < p_pict->i_planes; i_plane++ )
304 frame.data[i_plane] = p_pict->p[i_plane].p_pixels;
305 frame.linesize[i_plane] = p_pict->p[i_plane].i_pitch;
308 /* Set the pts of the frame being encoded (segfaults with mpeg4!)*/
309 if( p_enc->fmt_out.i_codec == VLC_FOURCC( 'm', 'p', 'g', 'v' ) ||
310 p_enc->fmt_out.i_codec == VLC_FOURCC( 'm', 'p', '1', 'v' ) ||
311 p_enc->fmt_out.i_codec == VLC_FOURCC( 'm', 'p', '2', 'v' ) )
313 frame.pts = p_pict->date;
314 #if LIBAVCODEC_BUILD >= 4673
315 if ( frame.pts && mdate() + HURRY_UP_GUARD > frame.pts
316 && p_enc->b_hurry_up )
318 msg_Dbg( p_enc, "hurry up mode" );
319 p_sys->p_context->mb_decision = FF_MB_DECISION_SIMPLE;
329 /* Let ffmpeg select the frame type */
331 frame.interlaced_frame = !p_pict->b_progressive;
332 frame.repeat_pict = p_pict->i_nb_fields;
333 frame.top_field_first = p_pict->b_top_field_first;
335 i_out = avcodec_encode_video( p_sys->p_context, p_sys->p_buffer_out,
336 AVCODEC_MAX_VIDEO_FRAME_SIZE, &frame );
338 #if LIBAVCODEC_BUILD >= 4673
341 p_sys->p_context->mb_decision = p_enc->i_hq;
347 block_t *p_block = block_New( p_enc, i_out );
348 memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
350 if( p_sys->p_context->coded_frame->pts != 0 &&
351 p_sys->i_buggy_pts_detect != p_sys->p_context->coded_frame->pts )
353 p_sys->i_buggy_pts_detect = p_sys->p_context->coded_frame->pts;
355 /* FIXME, 3-2 pulldown is not handled correctly */
356 p_block->i_length = I64C(1000000) *
357 p_enc->fmt_in.video.i_frame_rate_base /
358 p_enc->fmt_in.video.i_frame_rate;
359 p_block->i_pts = p_sys->p_context->coded_frame->pts;
361 if( !p_sys->p_context->delay ||
362 ( p_sys->p_context->coded_frame->pict_type != FF_I_TYPE &&
363 p_sys->p_context->coded_frame->pict_type != FF_P_TYPE ) )
365 p_block->i_dts = p_block->i_pts;
369 if( p_sys->i_last_ref_pts )
371 p_block->i_dts = p_sys->i_last_ref_pts;
375 /* Let's put something sensible */
376 p_block->i_dts = p_block->i_pts;
379 p_sys->i_last_ref_pts = p_block->i_pts;
384 /* Buggy libavcodec which doesn't update coded_frame->pts
386 p_block->i_length = I64C(1000000) *
387 p_enc->fmt_in.video.i_frame_rate_base /
388 p_enc->fmt_in.video.i_frame_rate;
389 p_block->i_dts = p_block->i_pts = p_pict->date;
398 /****************************************************************************
399 * EncodeAudio: the whole thing
400 ****************************************************************************/
401 static block_t *EncodeAudio( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
403 encoder_sys_t *p_sys = p_enc->p_sys;
404 block_t *p_block, *p_chain = NULL;
406 char *p_buffer = p_aout_buf->p_buffer;
407 int i_samples = p_aout_buf->i_nb_samples;
408 int i_samples_delay = p_sys->i_samples_delay;
410 p_sys->i_pts = p_aout_buf->start_date -
411 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
412 (mtime_t)p_enc->fmt_in.audio.i_rate;
414 p_sys->i_samples_delay += i_samples;
416 while( p_sys->i_samples_delay >= p_sys->p_context->frame_size )
421 if( i_samples_delay )
423 /* Take care of the left-over from last time */
424 int i_delay_size = i_samples_delay * 2 *
425 p_sys->p_context->channels;
426 int i_size = p_sys->i_frame_size - i_delay_size;
428 p_samples = (int16_t *)p_sys->p_buffer;
429 memcpy( p_sys->p_buffer + i_delay_size, p_buffer, i_size );
430 p_buffer -= i_delay_size;
431 i_samples += i_samples_delay;
436 p_samples = (int16_t *)p_buffer;
439 i_out = avcodec_encode_audio( p_sys->p_context, p_sys->p_buffer_out,
440 2 * AVCODEC_MAX_AUDIO_FRAME_SIZE,
444 msg_Warn( p_enc, "avcodec_encode_audio: %d", i_out );
446 if( i_out < 0 ) break;
448 p_buffer += p_sys->i_frame_size;
449 p_sys->i_samples_delay -= p_sys->p_context->frame_size;
450 i_samples -= p_sys->p_context->frame_size;
452 if( i_out == 0 ) continue;
454 p_block = block_New( p_enc, i_out );
455 memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
457 p_block->i_length = (mtime_t)1000000 *
458 (mtime_t)p_sys->p_context->frame_size /
459 (mtime_t)p_sys->p_context->sample_rate;
461 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
464 p_sys->i_pts += p_block->i_length;
465 block_ChainAppend( &p_chain, p_block );
468 /* Backup the remaining raw samples */
471 memcpy( p_sys->p_buffer, p_buffer + i_samples_delay * 2 *
472 p_sys->p_context->channels,
473 i_samples * 2 * p_sys->p_context->channels );
479 /*****************************************************************************
480 * CloseEncoder: ffmpeg encoder destruction
481 *****************************************************************************/
482 void E_(CloseEncoder)( vlc_object_t *p_this )
484 encoder_t *p_enc = (encoder_t *)p_this;
485 encoder_sys_t *p_sys = p_enc->p_sys;
487 avcodec_close( p_sys->p_context );
488 free( p_sys->p_context );
490 if( p_sys->p_buffer ) free( p_sys->p_buffer );
491 if( p_sys->p_buffer_out ) free( p_sys->p_buffer_out );