1 /*****************************************************************************
2 * video.c: video decoder using the ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_codec.h>
34 #include <vlc_codecs.h> /* BITMAPINFOHEADER */
35 #include <vlc_avcodec.h>
39 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
40 # include <libavcodec/avcodec.h>
41 # ifdef HAVE_AVCODEC_VAAPI
42 # include <libavcodec/vaapi.h>
44 #elif defined(HAVE_FFMPEG_AVCODEC_H)
45 # include <ffmpeg/avcodec.h>
53 /*****************************************************************************
54 * decoder_sys_t : decoder descriptor
55 *****************************************************************************/
60 /* Video decoder specific part */
67 /* for frame skipping algo */
69 enum AVDiscard i_skip_frame;
70 enum AVDiscard i_skip_idct;
72 /* how many decoded frames are late */
74 mtime_t i_late_frames_start;
76 /* for direct rendering */
77 bool b_direct_rendering;
81 /* Hack to force display of still pictures */
85 AVPaletteControl palette;
94 /* FIXME (dummy palette for now) */
95 static const AVPaletteControl palette_control;
97 /*****************************************************************************
99 *****************************************************************************/
100 static void ffmpeg_InitCodec ( decoder_t * );
101 static int ffmpeg_OpenCodec ( decoder_t * );
102 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
103 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
104 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
105 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
106 static void ffmpeg_NextPts( decoder_t * );
108 #ifdef HAVE_AVCODEC_VAAPI
109 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
110 const enum PixelFormat * );
113 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
115 uint8_t *p = (uint8_t*)&fcc;
116 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
119 /*****************************************************************************
121 *****************************************************************************/
123 /* Returns a new picture buffer */
124 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
125 AVCodecContext *p_context )
127 decoder_sys_t *p_sys = p_dec->p_sys;
129 p_dec->fmt_out.video.i_width = p_context->width;
130 p_dec->fmt_out.video.i_height = p_context->height;
132 if( !p_context->width || !p_context->height )
134 return NULL; /* invalid display size */
137 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
139 /* we are doomed, but not really, because most codecs set their pix_fmt
141 * FIXME does it make sense here ? */
142 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
144 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
146 /* If an aspect-ratio was specified in the input format then force it */
147 if( p_dec->fmt_in.video.i_aspect )
149 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
153 p_dec->fmt_out.video.i_aspect =
154 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
155 p_context->width / p_context->height );
156 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
157 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
159 if( p_dec->fmt_out.video.i_aspect == 0 )
161 p_dec->fmt_out.video.i_aspect =
162 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
166 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
167 p_dec->fmt_in.video.i_frame_rate_base > 0 )
169 p_dec->fmt_out.video.i_frame_rate =
170 p_dec->fmt_in.video.i_frame_rate;
171 p_dec->fmt_out.video.i_frame_rate_base =
172 p_dec->fmt_in.video.i_frame_rate_base;
174 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
176 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
177 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
180 return decoder_NewPicture( p_dec );
183 /*****************************************************************************
184 * InitVideo: initialize the video decoder
185 *****************************************************************************
186 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
187 * opened (done after the first decoded frame).
188 *****************************************************************************/
189 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
190 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
192 decoder_sys_t *p_sys;
195 /* Allocate the memory needed to store the decoder's structure */
196 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
199 p_sys->p_context = p_context;
200 p_sys->p_codec = p_codec;
201 p_sys->i_codec_id = i_codec_id;
202 p_sys->psz_namecodec = psz_namecodec;
203 p_sys->p_ff_pic = avcodec_alloc_frame();
204 p_sys->b_delayed_open = true;
207 /* ***** Fill p_context with init values ***** */
208 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
210 /* ***** Get configuration of ffmpeg plugin ***** */
211 p_sys->p_context->workaround_bugs =
212 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
213 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
214 p_sys->p_context->error_resilience =
215 config_GetInt( p_dec, "ffmpeg-error-resilience" );
217 p_sys->p_context->error_recognition =
218 config_GetInt( p_dec, "ffmpeg-error-resilience" );
221 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
222 var_Get( p_dec, "grayscale", &val );
223 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
225 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
226 var_Get( p_dec, "ffmpeg-vismv", &val );
227 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
229 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
230 var_Get( p_dec, "ffmpeg-lowres", &val );
231 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
233 var_Create( p_dec, "ffmpeg-skiploopfilter",
234 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
235 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
236 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
237 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
238 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
239 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
241 bool b_fast = var_CreateGetBool( p_dec, "ffmpeg-fast" );
242 if( b_fast ) p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
244 /* ***** ffmpeg frame skipping ***** */
245 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
246 var_Get( p_dec, "ffmpeg-hurry-up", &val );
247 p_sys->b_hurry_up = val.b_bool;
249 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
250 var_Get( p_dec, "ffmpeg-skip-frame", &val );
254 p_sys->p_context->skip_frame = AVDISCARD_NONE;
257 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
260 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
263 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
266 p_sys->p_context->skip_frame = AVDISCARD_ALL;
269 p_sys->p_context->skip_frame = AVDISCARD_NONE;
272 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
274 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
275 var_Get( p_dec, "ffmpeg-skip-idct", &val );
279 p_sys->p_context->skip_idct = AVDISCARD_NONE;
282 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
285 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
288 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
291 p_sys->p_context->skip_idct = AVDISCARD_ALL;
294 p_sys->p_context->skip_idct = AVDISCARD_NONE;
297 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
299 /* ***** ffmpeg direct rendering ***** */
300 p_sys->b_direct_rendering = false;
301 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
302 var_Get( p_dec, "ffmpeg-dr", &val );
303 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
304 /* Apparently direct rendering doesn't work with YUV422P */
305 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
306 /* H264 uses too many reference frames */
307 p_sys->i_codec_id != CODEC_ID_H264 &&
308 /* No idea why ... but this fixes flickering on some TSCC streams */
309 p_sys->i_codec_id != CODEC_ID_TSCC &&
310 !p_sys->p_context->debug_mv )
312 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
313 * so we need to do another check in ffmpeg_GetFrameBuf() */
314 p_sys->b_direct_rendering = true;
317 /* ffmpeg doesn't properly release old pictures when frames are skipped */
318 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
319 if( p_sys->b_direct_rendering )
321 msg_Dbg( p_dec, "using direct rendering" );
322 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
325 /* Always use our get_buffer wrapper so we can calculate the
327 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
328 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
329 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
330 p_sys->p_context->opaque = p_dec;
332 #ifdef HAVE_AVCODEC_VAAPI
333 if( var_CreateGetBool( p_dec, "ffmpeg-hw" ) )
334 p_sys->p_context->get_format = ffmpeg_GetFormat;
337 /* ***** misc init ***** */
338 p_sys->input_pts = p_sys->input_dts = 0;
340 p_sys->b_has_b_frames = false;
341 p_sys->b_first_frame = true;
342 p_sys->b_flush = false;
343 p_sys->i_late_frames = 0;
345 /* Set output properties */
346 p_dec->fmt_out.i_cat = VIDEO_ES;
347 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
349 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
350 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
352 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
355 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
356 if( p_dec->fmt_in.video.p_palette )
358 p_sys->palette.palette_changed = 1;
360 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
366 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
367 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
368 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
369 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
371 p_sys->palette.palette[i] = c.u;
373 p_sys->p_context->palctrl = &p_sys->palette;
375 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
376 if( p_dec->fmt_out.video.p_palette )
377 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
379 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
381 p_sys->p_context->palctrl = &p_sys->palette;
384 /* ***** init this codec with special data ***** */
385 ffmpeg_InitCodec( p_dec );
387 /* ***** Open the codec ***** */
388 if( ffmpeg_OpenCodec( p_dec ) < 0 )
390 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
391 av_free( p_sys->p_ff_pic );
399 /*****************************************************************************
400 * DecodeVideo: Called to decode one or more frames
401 *****************************************************************************/
402 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
404 decoder_sys_t *p_sys = p_dec->p_sys;
406 int b_null_size = false;
409 if( !pp_block || !*pp_block )
412 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
414 ffmpeg_InitCodec( p_dec );
415 if( p_sys->b_delayed_open )
417 if( ffmpeg_OpenCodec( p_dec ) )
418 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
423 if( p_sys->b_delayed_open )
425 block_Release( p_block );
429 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
431 p_sys->i_pts = 0; /* To make sure we recover properly */
433 p_sys->input_pts = p_sys->input_dts = 0;
434 p_sys->i_late_frames = 0;
436 block_Release( p_block );
438 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
439 //avcodec_flush_buffers( p_sys->p_context );
443 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
445 /* Do not care about late frames when prerolling
446 * TODO avoid decoding of non reference frame
447 * (ie all B except for H264 where it depends only on nal_ref_idc) */
448 p_sys->i_late_frames = 0;
451 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
452 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
456 msg_Err( p_dec, "more than 5 seconds of late video -> "
457 "dropping frame (computer too slow ?)" );
458 p_sys->i_pts = 0; /* To make sure we recover properly */
460 block_Release( p_block );
461 p_sys->i_late_frames--;
465 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
467 p_sys->input_pts = p_block->i_pts;
468 p_sys->input_dts = p_block->i_dts;
470 /* Make sure we don't reuse the same timestamps twice */
471 p_block->i_pts = p_block->i_dts = 0;
474 /* A good idea could be to decode all I pictures and see for the other */
475 if( !p_dec->b_pace_control &&
477 (p_sys->i_late_frames > 4) )
480 if( p_sys->i_late_frames < 12 )
482 p_sys->p_context->skip_frame =
483 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
484 AVDISCARD_BIDIR : p_sys->i_skip_frame;
488 /* picture too late, won't decode
489 * but break picture until a new I, and for mpeg4 ...*/
490 p_sys->i_late_frames--; /* needed else it will never be decrease */
491 block_Release( p_block );
497 if( p_sys->b_hurry_up )
498 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
499 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
505 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
507 if( p_sys->b_hurry_up )
508 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
511 else if( !b_drawpicture )
513 /* It creates broken picture
514 * FIXME either our parser or ffmpeg is broken */
516 if( p_sys->b_hurry_up )
517 p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
523 * Do the actual decoding now
526 /* Don't forget that ffmpeg requires a little more bytes
527 * that the real frame size */
528 if( p_block->i_buffer > 0 )
530 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
532 p_block = block_Realloc( p_block, 0,
533 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
537 memset( p_block->p_buffer + p_block->i_buffer - FF_INPUT_BUFFER_PADDING_SIZE, 0,
538 FF_INPUT_BUFFER_PADDING_SIZE );
541 while( p_block->i_buffer > 0 || p_sys->b_flush )
543 int i_used, b_gotpicture;
546 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
548 p_block->i_buffer <= 0 && p_sys->b_flush ? NULL : p_block->p_buffer, p_block->i_buffer );
550 if( b_null_size && p_sys->p_context->width > 0 &&
551 p_sys->p_context->height > 0 &&
554 /* Reparse it to not drop the I frame */
556 if( p_sys->b_hurry_up )
557 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
558 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
559 &b_gotpicture, p_block->p_buffer,
564 p_sys->b_first_frame = true;
566 if( p_block->i_buffer <= 0 )
567 p_sys->b_flush = false;
572 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
574 block_Release( p_block );
577 else if( i_used > p_block->i_buffer )
579 i_used = p_block->i_buffer;
583 p_block->i_buffer -= i_used;
584 p_block->p_buffer += i_used;
586 /* Nothing to display */
589 if( i_used == 0 ) break;
594 if( p_sys->p_ff_pic->pts )
595 p_sys->i_pts = p_sys->p_ff_pic->pts;
597 /* Update frame late count (except when doing preroll) */
598 mtime_t i_display_date = 0;
599 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
600 i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
602 if( i_display_date > 0 && i_display_date <= mdate() )
604 p_sys->i_late_frames++;
605 if( p_sys->i_late_frames == 1 )
606 p_sys->i_late_frames_start = mdate();
610 p_sys->i_late_frames = 0;
613 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
615 /* Do not display the picture */
616 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
617 if( !b_drawpicture && p_pic )
618 decoder_DeletePicture( p_dec, p_pic );
620 ffmpeg_NextPts( p_dec );
624 if( !p_sys->p_ff_pic->opaque )
626 /* Get a new picture */
627 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
630 block_Release( p_block );
634 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
636 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
640 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
643 /* Sanity check (seems to be needed for some streams) */
644 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
646 p_sys->b_has_b_frames = true;
649 if( !p_dec->fmt_in.video.i_aspect )
651 /* Fetch again the aspect ratio in case it changed */
652 p_dec->fmt_out.video.i_aspect =
654 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
655 * p_sys->p_context->width / p_sys->p_context->height );
656 p_dec->fmt_out.video.i_sar_num
657 = p_sys->p_context->sample_aspect_ratio.num;
658 p_dec->fmt_out.video.i_sar_den
659 = p_sys->p_context->sample_aspect_ratio.den;
661 if( p_dec->fmt_out.video.i_aspect == 0 )
663 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
664 * p_sys->p_context->width / p_sys->p_context->height;
668 /* Send decoded frame to vout */
671 p_pic->date = p_sys->i_pts;
673 ffmpeg_NextPts( p_dec );
675 if( p_sys->b_first_frame )
677 /* Hack to force display of still pictures */
678 p_sys->b_first_frame = false;
679 p_pic->b_force = true;
682 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
683 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
684 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
686 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
687 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
688 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
689 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
690 p_pic->i_qstride * i_mb_h );
691 switch( p_sys->p_ff_pic->qscale_type )
693 case FF_QSCALE_TYPE_MPEG1:
694 p_pic->i_qtype = QTYPE_MPEG1;
696 case FF_QSCALE_TYPE_MPEG2:
697 p_pic->i_qtype = QTYPE_MPEG2;
699 case FF_QSCALE_TYPE_H264:
700 p_pic->i_qtype = QTYPE_H264;
708 decoder_DeletePicture( p_dec, p_pic );
712 block_Release( p_block );
716 /*****************************************************************************
717 * EndVideo: decoder destruction
718 *****************************************************************************
719 * This function is called when the thread ends after a successful
721 *****************************************************************************/
722 void EndVideoDec( decoder_t *p_dec )
724 decoder_sys_t *p_sys = p_dec->p_sys;
726 avcodec_flush_buffers( p_sys->p_context );
728 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
731 VaDelete( p_sys->p_va );
734 /*****************************************************************************
735 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
736 *****************************************************************************/
737 static void ffmpeg_InitCodec( decoder_t *p_dec )
739 decoder_sys_t *p_sys = p_dec->p_sys;
740 int i_size = p_dec->fmt_in.i_extra;
742 if( !i_size ) return;
744 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
748 p_sys->p_context->extradata_size = i_size + 12;
749 p = p_sys->p_context->extradata =
750 malloc( p_sys->p_context->extradata_size );
754 memcpy( &p[0], "SVQ3", 4 );
755 memset( &p[4], 0, 8 );
756 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
758 /* Now remove all atoms before the SMI one */
759 if( p_sys->p_context->extradata_size > 0x5a &&
760 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
762 uint8_t *psz = &p[0x52];
764 while( psz < &p[p_sys->p_context->extradata_size - 8] )
766 int i_size = GetDWBE( psz );
769 /* FIXME handle 1 as long size */
772 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
774 memmove( &p[0x52], psz,
775 &p[p_sys->p_context->extradata_size] - psz );
785 p_sys->p_context->extradata_size = i_size;
786 p_sys->p_context->extradata =
787 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
788 if( p_sys->p_context->extradata )
790 memcpy( p_sys->p_context->extradata,
791 p_dec->fmt_in.p_extra, i_size );
792 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
793 0, FF_INPUT_BUFFER_PADDING_SIZE );
798 /*****************************************************************************
800 *****************************************************************************/
801 static int ffmpeg_OpenCodec( decoder_t *p_dec )
803 decoder_sys_t *p_sys = p_dec->p_sys;
805 if( p_sys->p_context->extradata_size <= 0 )
807 if( p_sys->i_codec_id == CODEC_ID_VC1 ||
808 p_sys->i_codec_id == CODEC_ID_VORBIS ||
809 p_sys->i_codec_id == CODEC_ID_THEORA )
811 msg_Warn( p_dec, "waiting for extra data for codec %s",
812 p_sys->psz_namecodec );
816 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
817 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
818 #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(52, 0, 0)
819 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
821 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
826 ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
827 vlc_avcodec_unlock();
830 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
832 p_sys->b_delayed_open = false;
836 char psz_version[128];
838 VaVersion( p_sys->p_va, psz_version, sizeof(psz_version) );
839 msg_Info( p_dec, "Using VA API version %s for hardware decoding.", psz_version );
844 /*****************************************************************************
845 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
846 * picture_t structure (when not in direct rendering mode).
847 *****************************************************************************/
848 static void ffmpeg_CopyPicture( decoder_t *p_dec,
849 picture_t *p_pic, AVFrame *p_ff_pic )
851 decoder_sys_t *p_sys = p_dec->p_sys;
855 VaExtract( p_sys->p_va, p_pic, p_ff_pic );
857 else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
859 int i_plane, i_size, i_line;
860 uint8_t *p_dst, *p_src;
861 int i_src_stride, i_dst_stride;
863 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
865 p_src = p_ff_pic->data[i_plane];
866 p_dst = p_pic->p[i_plane].p_pixels;
867 i_src_stride = p_ff_pic->linesize[i_plane];
868 i_dst_stride = p_pic->p[i_plane].i_pitch;
870 i_size = __MIN( i_src_stride, i_dst_stride );
871 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
874 vlc_memcpy( p_dst, p_src, i_size );
875 p_src += i_src_stride;
876 p_dst += i_dst_stride;
882 msg_Err( p_dec, "don't know how to convert chroma %i",
883 p_sys->p_context->pix_fmt );
888 /*****************************************************************************
889 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
890 *****************************************************************************
891 * It is used for direct rendering as well as to get the right PTS for each
892 * decoded picture (even in indirect rendering mode).
893 *****************************************************************************/
894 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
896 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
899 decoder_t *p_dec = (decoder_t *)p_context->opaque;
900 decoder_sys_t *p_sys = p_dec->p_sys;
903 /* Set picture PTS */
904 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
907 p_ff_pic->opaque = NULL;
911 #ifdef HAVE_AVCODEC_VAAPI
912 /* hwaccel_context is not present in old fffmpeg version */
913 if( VaSetup( p_sys->p_va,
914 &p_sys->p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
915 p_sys->p_context->width, p_sys->p_context->height ) )
917 msg_Err( p_dec, "VaSetup failed" );
925 p_ff_pic->type = FF_BUFFER_TYPE_USER;
926 /* FIXME what is that, should give good value */
927 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
929 if( VaGrabSurface( p_sys->p_va, p_ff_pic ) )
931 msg_Err( p_dec, "VaGrabSurface failed" );
936 else if( !p_sys->b_direct_rendering )
938 /* Not much to do in indirect rendering mode */
939 return avcodec_default_get_buffer( p_context, p_ff_pic );
942 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
943 * so we need to check for direct rendering again. */
945 int i_width = p_sys->p_context->width;
946 int i_height = p_sys->p_context->height;
947 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
949 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
950 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
951 /* We only pad picture up to 16 */
952 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
953 p_context->pix_fmt == PIX_FMT_PAL8 )
954 return avcodec_default_get_buffer( p_context, p_ff_pic );
956 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
958 /* Get a new picture */
959 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
961 return avcodec_default_get_buffer( p_context, p_ff_pic );
963 p_sys->p_context->draw_horiz_band = NULL;
965 p_ff_pic->opaque = (void*)p_pic;
966 p_ff_pic->type = FF_BUFFER_TYPE_USER;
967 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
968 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
969 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
970 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
972 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
973 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
974 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
975 p_ff_pic->linesize[3] = 0;
977 decoder_LinkPicture( p_dec, p_pic );
979 /* FIXME what is that, should give good value */
980 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
984 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
986 decoder_t *p_dec = (decoder_t *)p_context->opaque;
990 p_ff_pic->pts = AV_NOPTS_VALUE;
992 /* We always use default reget function, it works perfectly fine */
993 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
995 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
996 * ffmpeg_GetFrameBuf call) */
997 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
998 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
1003 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
1005 decoder_sys_t *p_sys = p_dec->p_sys;
1007 /* Set picture PTS */
1008 if( p_sys->input_pts )
1010 p_ff_pic->pts = p_sys->input_pts;
1012 else if( p_sys->input_dts )
1014 /* Some demuxers only set the dts so let's try to find a useful
1015 * timestamp from this */
1016 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
1017 !p_ff_pic->reference || !p_sys->i_pts )
1019 p_ff_pic->pts = p_sys->input_dts;
1031 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
1033 p_sys->input_pts = p_sys->input_dts = 0;
1037 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1040 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1041 decoder_sys_t *p_sys = p_dec->p_sys;
1045 VaUngrabSurface( p_sys->p_va, p_ff_pic );
1048 for( int i = 0; i < 4; i++ )
1049 p_ff_pic->data[i] = NULL;
1051 else if( !p_ff_pic->opaque )
1053 avcodec_default_release_buffer( p_context, p_ff_pic );
1057 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1059 decoder_UnlinkPicture( p_dec, p_pic );
1062 for( int i = 0; i < 4; i++ )
1063 p_ff_pic->data[i] = NULL;
1067 static void ffmpeg_NextPts( decoder_t *p_dec )
1069 decoder_sys_t *p_sys = p_dec->p_sys;
1071 if( p_sys->i_pts <= 0 )
1074 /* interpolate the next PTS */
1075 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1076 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1078 p_sys->i_pts += INT64_C(1000000) *
1079 (2 + p_sys->p_ff_pic->repeat_pict) *
1080 p_dec->fmt_in.video.i_frame_rate_base /
1081 (2 * p_dec->fmt_in.video.i_frame_rate);
1083 else if( p_sys->p_context->time_base.den > 0 )
1085 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52,20,0)
1086 int i_tick = p_sys->p_context->ticks_per_frame;
1093 p_sys->i_pts += INT64_C(1000000) *
1094 (2 + p_sys->p_ff_pic->repeat_pict) *
1095 i_tick * p_sys->p_context->time_base.num /
1096 (2 * p_sys->p_context->time_base.den);
1100 #ifdef HAVE_AVCODEC_VAAPI
1101 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_codec,
1102 const enum PixelFormat *pi_fmt )
1104 decoder_t *p_dec = p_codec->opaque;
1105 decoder_sys_t *p_sys = p_dec->p_sys;
1109 VaDelete( p_sys->p_va );
1113 /* Try too look for a supported hw acceleration */
1114 for( int i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1116 static const char *ppsz_name[PIX_FMT_NB] = {
1117 [PIX_FMT_VDPAU_H264] = "PIX_FMT_VDPAU_H264",
1118 [PIX_FMT_VAAPI_IDCT] = "PIX_FMT_VAAPI_IDCT",
1119 [PIX_FMT_VAAPI_VLD] = "PIX_FMT_VAAPI_VLD",
1120 [PIX_FMT_VAAPI_MOCO] = "PIX_FMT_VAAPI_MOCO",
1121 [PIX_FMT_YUYV422] = "PIX_FMT_YUYV422",
1122 [PIX_FMT_YUV420P] = "PIX_FMT_YUV420P",
1124 msg_Dbg( p_dec, "Available decoder output format %d (%s)", pi_fmt[i], ppsz_name[pi_fmt[i]] ?: "Unknown" );
1126 /* Only VLD supported */
1127 if( pi_fmt[i] == PIX_FMT_VAAPI_VLD )
1129 msg_Dbg( p_dec, "Trying VA API" );
1130 p_sys->p_va = VaNew( p_sys->i_codec_id );
1133 /* FIXME this will disabled direct rendering
1134 * even if a new pixel format is renegociated
1136 * FIXME Try to call VaSetup when possible
1137 * to detect errors when possible (later is too late) */
1138 p_sys->b_direct_rendering = false;
1139 p_sys->p_context->draw_horiz_band = NULL;
1142 msg_Warn( p_dec, "Failed to open VA API" );
1146 /* Fallback to default behaviour */
1147 return avcodec_default_get_format( p_codec, pi_fmt );