1 /*****************************************************************************
2 * video.c: video decoder using the ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: video.c,v 1.61 2004/01/18 21:30:25 fenrir 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 *****************************************************************************/
29 #include <vlc/decoder.h>
32 #ifdef HAVE_FFMPEG_AVCODEC_H
33 # include <ffmpeg/avcodec.h>
40 /*****************************************************************************
41 * decoder_sys_t : decoder descriptor
42 *****************************************************************************/
45 /* Common part between video and audio decoder */
50 AVCodecContext *p_context;
53 /* Video decoder specific part */
59 BITMAPINFOHEADER *p_format;
61 /* for frame skipping algo */
65 /* how many decoded frames are late */
67 mtime_t i_late_frames_start;
69 /* for direct rendering */
70 int b_direct_rendering;
72 vlc_bool_t b_has_b_frames;
74 int i_buffer_orig, i_buffer;
75 char *p_buffer_orig, *p_buffer;
77 /* Postprocessing handle */
80 vlc_bool_t b_pp_async;
84 /* FIXME (dummy palette for now) */
85 static AVPaletteControl palette_control;
87 /*****************************************************************************
89 *****************************************************************************/
90 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
91 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
92 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
94 /*****************************************************************************
96 *****************************************************************************/
97 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
101 case PIX_FMT_YUV420P:
102 return VLC_FOURCC('I','4','2','0');
103 case PIX_FMT_YUV422P:
104 return VLC_FOURCC('I','4','2','2');
105 case PIX_FMT_YUV444P:
106 return VLC_FOURCC('I','4','4','4');
109 return VLC_FOURCC('Y','U','Y','2');
112 return VLC_FOURCC('R','V','1','5');
114 return VLC_FOURCC('R','V','1','6');
116 return VLC_FOURCC('R','V','2','4');
118 return VLC_FOURCC('R','V','3','2');
120 return VLC_FOURCC('G','R','E','Y');
122 case PIX_FMT_YUV410P:
123 case PIX_FMT_YUV411P:
130 /* Returns a new picture buffer */
131 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
132 AVCodecContext *p_context )
134 decoder_sys_t *p_sys = p_dec->p_sys;
137 p_dec->fmt_out.video.i_width = p_context->width;
138 p_dec->fmt_out.video.i_height = p_context->height;
139 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
141 if( !p_context->width || !p_context->height )
143 return NULL; /* invalid display size */
146 if( !p_dec->fmt_out.i_codec )
148 /* we make conversion if possible*/
149 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
152 /* If an aspect-ratio was specified in the input format then force it */
153 if( p_dec->fmt_in.video.i_aspect )
155 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
159 #if LIBAVCODEC_BUILD >= 4687
160 p_dec->fmt_out.video.i_aspect =
161 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
162 p_context->width / p_context->height );
164 p_dec->fmt_out.video.i_aspect =
165 VOUT_ASPECT_FACTOR * p_context->aspect_ratio;
167 if( p_dec->fmt_out.video.i_aspect == 0 )
169 p_dec->fmt_out.video.i_aspect =
170 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
174 p_pic = p_dec->pf_vout_buffer_new( p_dec );
177 if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
179 E_(InitPostproc)( p_dec, p_sys->p_pp, p_context->width,
180 p_context->height, p_context->pix_fmt );
181 p_sys->b_pp_init = VLC_TRUE;
188 /*****************************************************************************
189 * InitVideo: initialize the video decoder
190 *****************************************************************************
191 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
192 * opened (done after the first decoded frame).
193 *****************************************************************************/
194 int E_(InitVideoDec)( decoder_t *p_dec, AVCodecContext *p_context,
195 AVCodec *p_codec, int i_codec_id, char *psz_namecodec )
197 decoder_sys_t *p_sys;
203 var_Get( p_dec->p_libvlc, "avcodec", &lockval );
205 /* Allocate the memory needed to store the decoder's structure */
206 if( ( p_dec->p_sys = p_sys =
207 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
209 msg_Err( p_dec, "out of memory" );
213 p_dec->p_sys->p_context = p_context;
214 p_dec->p_sys->p_codec = p_codec;
215 p_dec->p_sys->i_codec_id = i_codec_id;
216 p_dec->p_sys->psz_namecodec = psz_namecodec;
217 p_sys->p_ff_pic = avcodec_alloc_frame();
219 /* ***** Fill p_context with init values ***** */
220 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
221 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
223 /* ***** Get configuration of ffmpeg plugin ***** */
224 i_tmp = config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
225 p_sys->p_context->workaround_bugs = __MAX( __MIN( i_tmp, 99 ), 0 );
227 i_tmp = config_GetInt( p_dec, "ffmpeg-error-resilience" );
228 p_sys->p_context->error_resilience = __MAX( __MIN( i_tmp, 99 ), -1 );
230 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
231 var_Get( p_dec, "grayscale", &val );
232 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
234 /* Decide if we set CODEC_FLAG_TRUNCATED */
235 var_Create( p_dec, "ffmpeg-truncated", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
236 var_Get( p_dec, "ffmpeg-truncated", &val );
237 if( val.i_int > 0 ) p_sys->p_context->flags |= CODEC_FLAG_TRUNCATED;
239 /* ***** ffmpeg frame skipping ***** */
240 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
241 var_Get( p_dec, "ffmpeg-hurry-up", &val );
242 p_sys->b_hurry_up = val.b_bool;
244 /* ***** ffmpeg direct rendering ***** */
245 p_sys->b_direct_rendering = 0;
246 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
247 var_Get( p_dec, "ffmpeg-dr", &val );
248 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
249 ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) &&
250 /* Apparently direct rendering doesn't work with YUV422P */
251 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
252 !(p_sys->p_context->width % 16) && !(p_sys->p_context->height % 16) )
254 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
255 * so we need to do another check in ffmpeg_GetFrameBuf() */
256 p_sys->b_direct_rendering = 1;
261 p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = VLC_FALSE;
262 p_sys->p_pp = E_(OpenPostproc)( p_dec, &p_sys->b_pp_async );
265 /* ffmpeg doesn't properly release old pictures when frames are skipped */
266 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
267 if( p_sys->b_direct_rendering )
269 msg_Dbg( p_dec, "using direct rendering" );
270 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
273 /* Always use our get_buffer wrapper so we can calculate the
275 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
276 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
277 p_sys->p_context->opaque = p_dec;
279 /* ***** init this codec with special data ***** */
280 if( p_dec->fmt_in.i_extra )
282 int i_size = p_dec->fmt_in.i_extra;
284 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
288 p_sys->p_context->extradata_size = i_size + 12;
289 p = p_sys->p_context->extradata =
290 malloc( p_sys->p_context->extradata_size );
292 memcpy( &p[0], "SVQ3", 4 );
293 memset( &p[4], 0, 8 );
294 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
296 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
297 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
298 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
300 if( p_dec->fmt_in.i_extra == 8 )
302 p_sys->p_context->extradata_size = 8;
303 p_sys->p_context->extradata = malloc( 8 );
305 memcpy( p_sys->p_context->extradata,
306 p_dec->fmt_in.p_extra,
307 p_dec->fmt_in.i_extra );
308 p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
310 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x", p_sys->p_context->sub_id );
315 p_sys->p_context->extradata_size = i_size;
316 p_sys->p_context->extradata =
317 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
318 memcpy( p_sys->p_context->extradata,
319 p_dec->fmt_in.p_extra, i_size );
320 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
321 0, FF_INPUT_BUFFER_PADDING_SIZE );
325 /* ***** misc init ***** */
326 p_sys->input_pts = p_sys->input_dts = 0;
328 p_sys->b_has_b_frames = VLC_FALSE;
329 p_sys->i_late_frames = 0;
331 p_sys->i_buffer_orig = 1;
332 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer );
334 /* Set output properties */
335 p_dec->fmt_out.i_cat = VIDEO_ES;
336 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
338 /* Setup dummy palette to avoid segfaults with some codecs */
339 #if LIBAVCODEC_BUILD >= 4688
340 p_sys->p_context->palctrl = &palette_control;
343 /* ***** Open the codec ***** */
344 vlc_mutex_lock( lockval.p_address );
345 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
347 vlc_mutex_unlock( lockval.p_address );
348 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
351 vlc_mutex_unlock( lockval.p_address );
352 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
358 /*****************************************************************************
359 * DecodeVideo: Called to decode one or more frames
360 *****************************************************************************/
361 picture_t *E_(DecodeVideo)( decoder_t *p_dec, block_t **pp_block )
363 decoder_sys_t *p_sys = p_dec->p_sys;
367 if( !pp_block || !*pp_block ) return NULL;
371 if( p_block->b_discontinuity )
374 p_sys->i_pts = 0; /* To make sure we recover properly */
376 block_Release( p_block );
380 if( p_sys->i_late_frames > 0 &&
381 mdate() - p_sys->i_late_frames_start > I64C(5000000) )
385 msg_Err( p_dec, "more than 5 seconds of late video -> "
386 "dropping frame (computer too slow ?)" );
387 p_sys->i_pts = 0; /* To make sure we recover properly */
389 block_Release( p_block );
390 p_sys->i_late_frames--;
394 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
396 p_sys->input_pts = p_block->i_pts;
397 p_sys->input_dts = p_block->i_dts;
399 /* Make sure we don't reuse the same timestamps twice */
400 p_block->i_pts = p_block->i_dts = 0;
403 /* TODO implement it in a better way */
404 /* A good idea could be to decode all I pictures and see for the other */
405 if( p_sys->b_hurry_up && p_sys->i_late_frames > 4 )
408 if( p_sys->i_late_frames < 8 )
410 p_sys->p_context->hurry_up = 2;
414 /* picture too late, won't decode
415 * but break picture until a new I, and for mpeg4 ...*/
417 p_sys->i_late_frames--; /* needed else it will never be decrease */
418 block_Release( p_block );
426 p_sys->p_context->hurry_up = 0;
430 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
432 p_sys->p_context->hurry_up = 5;
436 * Do the actual decoding now
439 /* Check if post-processing was enabled */
440 p_sys->b_pp = p_sys->b_pp_async;
442 /* Don't forget that ffmpeg requires a little more bytes
443 * that the real frame size */
444 if( p_block->i_buffer > 0 )
446 p_sys->i_buffer = p_block->i_buffer;
447 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
448 p_sys->i_buffer_orig )
450 free( p_sys->p_buffer_orig );
451 p_sys->i_buffer_orig =
452 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
453 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
455 p_sys->p_buffer = p_sys->p_buffer_orig;
456 p_sys->i_buffer = p_block->i_buffer;
457 p_dec->p_vlc->pf_memcpy( p_sys->p_buffer, p_block->p_buffer,
459 memset( p_sys->p_buffer + p_block->i_buffer, 0,
460 FF_INPUT_BUFFER_PADDING_SIZE );
462 p_block->i_buffer = 0;
465 while( p_sys->i_buffer > 0 )
467 int i_used, b_gotpicture;
470 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
472 p_sys->p_buffer, p_sys->i_buffer );
475 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
477 block_Release( p_block );
480 else if( i_used > p_sys->i_buffer )
482 i_used = p_sys->i_buffer;
486 p_sys->i_buffer -= i_used;
487 p_sys->p_buffer += i_used;
489 /* Nothing to display */
499 /* Update frame late count*/
500 if( p_sys->i_pts && p_sys->i_pts <= mdate() )
502 p_sys->i_late_frames++;
503 if( p_sys->i_late_frames == 1 )
504 p_sys->i_late_frames_start = mdate();
508 p_sys->i_late_frames = 0;
511 if( !b_drawpicture || p_sys->p_ff_pic->linesize[0] == 0 )
513 /* Do not display the picture */
517 if( !p_sys->b_direct_rendering || p_sys->b_pp )
519 /* Get a new picture */
520 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
523 block_Release( p_block );
527 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
529 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
533 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
537 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
539 /* Sanity check (seems to be needed for some streams ) */
540 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
542 p_sys->b_has_b_frames = VLC_TRUE;
545 /* Send decoded frame to vout */
548 p_pic->date = p_sys->i_pts;
550 /* interpolate the next PTS */
551 if( p_sys->p_context->frame_rate > 0 )
553 p_sys->i_pts += I64C(1000000) *
554 (2 + p_sys->p_ff_pic->repeat_pict) *
555 p_sys->p_context->frame_rate_base /
556 (2 * p_sys->p_context->frame_rate);
562 p_dec->pf_vout_buffer_del( p_dec, p_pic );
566 block_Release( p_block );
570 /*****************************************************************************
571 * EndVideo: decoder destruction
572 *****************************************************************************
573 * This function is called when the thread ends after a sucessful
575 *****************************************************************************/
576 void E_(EndVideoDec)( decoder_t *p_dec )
578 decoder_sys_t *p_sys = p_dec->p_sys;
580 if( p_sys->p_ff_pic ) free( p_sys->p_ff_pic );
583 E_(ClosePostproc)( p_dec, p_sys->p_pp );
586 free( p_sys->p_buffer_orig );
589 /*****************************************************************************
590 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
591 * picture_t structure (when not in direct rendering mode).
592 *****************************************************************************/
593 static void ffmpeg_CopyPicture( decoder_t *p_dec,
594 picture_t *p_pic, AVFrame *p_ff_pic )
596 decoder_sys_t *p_sys = p_dec->p_sys;
598 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
600 int i_plane, i_size, i_line;
601 uint8_t *p_dst, *p_src;
602 int i_src_stride, i_dst_stride;
605 if( p_sys->p_pp && p_sys->b_pp )
606 E_(PostprocPict)( p_dec, p_sys->p_pp, p_pic, p_ff_pic );
609 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
611 p_src = p_ff_pic->data[i_plane];
612 p_dst = p_pic->p[i_plane].p_pixels;
613 i_src_stride = p_ff_pic->linesize[i_plane];
614 i_dst_stride = p_pic->p[i_plane].i_pitch;
616 i_size = __MIN( i_src_stride, i_dst_stride );
617 for( i_line = 0; i_line < p_pic->p[i_plane].i_lines; i_line++ )
619 p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_size );
620 p_src += i_src_stride;
621 p_dst += i_dst_stride;
630 /* we need to convert to I420 */
631 switch( p_sys->p_context->pix_fmt )
633 case PIX_FMT_YUV410P:
634 case PIX_FMT_YUV411P:
636 for( i = 0; i < p_pic->i_planes; i++ )
638 dest_pic.data[i] = p_pic->p[i].p_pixels;
639 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
641 img_convert( &dest_pic, PIX_FMT_YUV420P,
642 (AVPicture *)p_ff_pic,
643 p_sys->p_context->pix_fmt,
644 p_sys->p_context->width,
645 p_sys->p_context->height );
648 msg_Err( p_dec, "don't know how to convert chroma %i",
649 p_sys->p_context->pix_fmt );
656 /*****************************************************************************
657 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
658 *****************************************************************************
659 * It is used for direct rendering as well as to get the right PTS for each
660 * decoded picture (even in indirect rendering mode).
661 *****************************************************************************/
662 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
665 decoder_t *p_dec = (decoder_t *)p_context->opaque;
666 decoder_sys_t *p_sys = p_dec->p_sys;
669 /* Set picture PTS */
670 if( p_sys->input_pts )
672 p_ff_pic->pts = p_sys->input_pts;
674 else if( p_sys->input_dts )
676 /* Some demuxers only set the dts so let's try to find a useful
677 * timestamp from this */
678 if( !p_context->has_b_frames || !p_sys->b_has_b_frames ||
679 !p_ff_pic->reference )
681 p_ff_pic->pts = p_sys->input_dts;
683 else p_ff_pic->pts = 0;
685 else p_ff_pic->pts = 0;
687 p_sys->input_pts = p_sys->input_dts = 0;
689 /* Not much to do in indirect rendering mode */
690 if( !p_sys->b_direct_rendering || p_sys->b_pp )
692 return avcodec_default_get_buffer( p_context, p_ff_pic );
695 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
696 * so this check is necessary. */
697 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
698 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
700 msg_Dbg( p_dec, "disabling direct rendering" );
701 p_sys->b_direct_rendering = 0;
702 return avcodec_default_get_buffer( p_context, p_ff_pic );
705 /* Get a new picture */
706 //p_sys->p_vout->render.b_allow_modify_pics = 0;
707 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
710 p_sys->b_direct_rendering = 0;
711 return avcodec_default_get_buffer( p_context, p_ff_pic );
713 p_sys->p_context->draw_horiz_band = NULL;
715 p_ff_pic->opaque = (void*)p_pic;
716 p_ff_pic->type = FF_BUFFER_TYPE_USER;
717 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
718 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
719 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
720 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
722 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
723 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
724 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
725 p_ff_pic->linesize[3] = 0;
727 if( p_ff_pic->reference != 0 )
729 p_dec->pf_picture_link( p_dec, p_pic );
732 /* FIXME what is that, should give good value */
733 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
738 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
741 decoder_t *p_dec = (decoder_t *)p_context->opaque;
744 if( p_ff_pic->type != FF_BUFFER_TYPE_USER )
746 avcodec_default_release_buffer( p_context, p_ff_pic );
750 p_pic = (picture_t*)p_ff_pic->opaque;
752 p_ff_pic->data[0] = NULL;
753 p_ff_pic->data[1] = NULL;
754 p_ff_pic->data[2] = NULL;
755 p_ff_pic->data[3] = NULL;
757 if( p_ff_pic->reference != 0 )
759 p_dec->pf_picture_unlink( p_dec, p_pic );