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 # ifdef HAVE_AVCODEC_DXVA2
45 # include <libavcodec/dxva2.h>
47 #elif defined(HAVE_FFMPEG_AVCODEC_H)
48 # include <ffmpeg/avcodec.h>
55 #if defined(HAVE_AVCODEC_VAAPI) || defined(HAVE_AVCODEC_DXVA2)
56 # define HAVE_AVCODEC_VA
59 /*****************************************************************************
60 * decoder_sys_t : decoder descriptor
61 *****************************************************************************/
66 /* Video decoder specific part */
73 /* for frame skipping algo */
75 enum AVDiscard i_skip_frame;
76 enum AVDiscard i_skip_idct;
78 /* how many decoded frames are late */
80 mtime_t i_late_frames_start;
82 /* for direct rendering */
83 bool b_direct_rendering;
84 int i_direct_rendering_used;
88 /* Hack to force display of still pictures */
92 AVPaletteControl palette;
101 /* FIXME (dummy palette for now) */
102 static const AVPaletteControl palette_control;
104 /*****************************************************************************
106 *****************************************************************************/
107 static void ffmpeg_InitCodec ( decoder_t * );
108 static int ffmpeg_OpenCodec ( decoder_t * );
109 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
110 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
111 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
112 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
113 static void ffmpeg_NextPts( decoder_t * );
115 #ifdef HAVE_AVCODEC_VA
116 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
117 const enum PixelFormat * );
120 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
122 uint8_t *p = (uint8_t*)&fcc;
123 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
126 /*****************************************************************************
128 *****************************************************************************/
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;
136 p_dec->fmt_out.video.i_width = p_context->width;
137 p_dec->fmt_out.video.i_height = p_context->height;
139 if( !p_context->width || !p_context->height )
141 return NULL; /* invalid display size */
144 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
146 /* we are doomed, but not really, because most codecs set their pix_fmt
148 * FIXME does it make sense here ? */
149 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
151 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
153 /* If an aspect-ratio was specified in the input format then force it */
154 if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
156 p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
157 p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
161 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
162 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
164 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
166 p_dec->fmt_out.video.i_sar_num = 1;
167 p_dec->fmt_out.video.i_sar_den = 1;
171 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
172 p_dec->fmt_in.video.i_frame_rate_base > 0 )
174 p_dec->fmt_out.video.i_frame_rate =
175 p_dec->fmt_in.video.i_frame_rate;
176 p_dec->fmt_out.video.i_frame_rate_base =
177 p_dec->fmt_in.video.i_frame_rate_base;
179 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
181 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
182 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
185 return decoder_NewPicture( p_dec );
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 InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
195 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
197 decoder_sys_t *p_sys;
200 /* Allocate the memory needed to store the decoder's structure */
201 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
204 p_codec->type = CODEC_TYPE_VIDEO;
205 p_context->codec_type = CODEC_TYPE_VIDEO;
206 p_context->codec_id = i_codec_id;
207 p_sys->p_context = p_context;
208 p_sys->p_codec = p_codec;
209 p_sys->i_codec_id = i_codec_id;
210 p_sys->psz_namecodec = psz_namecodec;
211 p_sys->p_ff_pic = avcodec_alloc_frame();
212 p_sys->b_delayed_open = true;
215 /* ***** Fill p_context with init values ***** */
216 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
218 /* ***** Get configuration of ffmpeg plugin ***** */
219 p_sys->p_context->workaround_bugs =
220 var_InheritInteger( p_dec, "ffmpeg-workaround-bugs" );
221 #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 0, 0 )
222 p_sys->p_context->error_resilience =
223 var_InheritInteger( p_dec, "ffmpeg-error-resilience" );
225 p_sys->p_context->error_recognition =
226 var_InheritInteger( p_dec, "ffmpeg-error-resilience" );
229 if( var_CreateGetBool( p_dec, "grayscale" ) )
230 p_sys->p_context->flags |= CODEC_FLAG_GRAY;
232 i_val = var_CreateGetInteger( p_dec, "ffmpeg-vismv" );
233 if( i_val ) p_sys->p_context->debug_mv = i_val;
235 i_val = var_CreateGetInteger( p_dec, "ffmpeg-lowres" );
236 if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
238 i_val = var_CreateGetInteger( p_dec, "ffmpeg-skiploopfilter" );
239 if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
240 else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
241 else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
242 else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
244 if( var_CreateGetBool( p_dec, "ffmpeg-fast" ) )
245 p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
247 /* ***** ffmpeg frame skipping ***** */
248 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "ffmpeg-hurry-up" );
250 switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-frame" ) )
253 p_sys->p_context->skip_frame = AVDISCARD_NONE;
256 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
259 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
262 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
265 p_sys->p_context->skip_frame = AVDISCARD_ALL;
268 p_sys->p_context->skip_frame = AVDISCARD_NONE;
271 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
273 switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-idct" ) )
276 p_sys->p_context->skip_idct = AVDISCARD_NONE;
279 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
282 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
285 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
288 p_sys->p_context->skip_idct = AVDISCARD_ALL;
291 p_sys->p_context->skip_idct = AVDISCARD_NONE;
294 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
296 /* ***** ffmpeg direct rendering ***** */
297 p_sys->b_direct_rendering = false;
298 p_sys->i_direct_rendering_used = -1;
299 if( var_CreateGetBool( p_dec, "ffmpeg-dr" ) &&
300 (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
301 /* H264 uses too many reference frames */
302 p_sys->i_codec_id != CODEC_ID_H264 &&
303 /* No idea why ... but this fixes flickering on some TSCC streams */
304 p_sys->i_codec_id != CODEC_ID_TSCC &&
305 !p_sys->p_context->debug_mv )
307 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
308 * so we need to do another check in ffmpeg_GetFrameBuf() */
309 p_sys->b_direct_rendering = true;
312 /* ffmpeg doesn't properly release old pictures when frames are skipped */
313 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
314 if( p_sys->b_direct_rendering )
316 msg_Dbg( p_dec, "trying to use direct rendering" );
317 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
321 msg_Dbg( p_dec, "direct rendering is disabled" );
324 /* Always use our get_buffer wrapper so we can calculate the
326 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
327 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
328 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
329 p_sys->p_context->opaque = p_dec;
331 #ifdef HAVE_AVCODEC_VA
332 if( var_CreateGetBool( p_dec, "ffmpeg-hw" ) )
333 p_sys->p_context->get_format = ffmpeg_GetFormat;
336 /* ***** misc init ***** */
337 p_sys->input_pts = p_sys->input_dts = 0;
339 p_sys->b_has_b_frames = false;
340 p_sys->b_first_frame = true;
341 p_sys->b_flush = false;
342 p_sys->i_late_frames = 0;
344 /* Set output properties */
345 p_dec->fmt_out.i_cat = VIDEO_ES;
346 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
348 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
349 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
351 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
354 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
355 if( p_dec->fmt_in.video.p_palette )
357 p_sys->palette.palette_changed = 1;
359 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
365 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
366 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
367 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
368 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
370 p_sys->palette.palette[i] = c.u;
372 p_sys->p_context->palctrl = &p_sys->palette;
374 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
375 if( p_dec->fmt_out.video.p_palette )
376 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
378 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
380 p_sys->p_context->palctrl = &p_sys->palette;
383 /* ***** init this codec with special data ***** */
384 ffmpeg_InitCodec( p_dec );
386 /* ***** Open the codec ***** */
387 if( ffmpeg_OpenCodec( p_dec ) < 0 )
389 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
390 av_free( p_sys->p_ff_pic );
398 /*****************************************************************************
399 * DecodeVideo: Called to decode one or more frames
400 *****************************************************************************/
401 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
403 decoder_sys_t *p_sys = p_dec->p_sys;
405 int b_null_size = false;
408 if( !pp_block || !*pp_block )
411 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
413 ffmpeg_InitCodec( p_dec );
414 if( p_sys->b_delayed_open )
416 if( ffmpeg_OpenCodec( p_dec ) )
417 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
422 if( p_sys->b_delayed_open )
424 block_Release( p_block );
428 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
430 p_sys->i_pts = 0; /* To make sure we recover properly */
432 p_sys->input_pts = p_sys->input_dts = 0;
433 p_sys->i_late_frames = 0;
435 block_Release( p_block );
437 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
438 //avcodec_flush_buffers( p_sys->p_context );
442 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
444 /* Do not care about late frames when prerolling
445 * TODO avoid decoding of non reference frame
446 * (ie all B except for H264 where it depends only on nal_ref_idc) */
447 p_sys->i_late_frames = 0;
450 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
451 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
455 msg_Err( p_dec, "more than 5 seconds of late video -> "
456 "dropping frame (computer too slow ?)" );
457 p_sys->i_pts = 0; /* To make sure we recover properly */
459 block_Release( p_block );
460 p_sys->i_late_frames--;
464 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
466 p_sys->input_pts = p_block->i_pts;
467 p_sys->input_dts = p_block->i_dts;
469 /* Make sure we don't reuse the same timestamps twice */
470 p_block->i_pts = p_block->i_dts = 0;
473 /* A good idea could be to decode all I pictures and see for the other */
474 if( !p_dec->b_pace_control &&
476 (p_sys->i_late_frames > 4) )
479 if( p_sys->i_late_frames < 12 )
481 p_sys->p_context->skip_frame =
482 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
483 AVDISCARD_BIDIR : p_sys->i_skip_frame;
487 /* picture too late, won't decode
488 * but break picture until a new I, and for mpeg4 ...*/
489 p_sys->i_late_frames--; /* needed else it will never be decrease */
490 block_Release( p_block );
496 if( p_sys->b_hurry_up )
497 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
498 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
504 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
506 if( p_sys->b_hurry_up )
507 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
510 else if( !b_drawpicture )
512 /* It creates broken picture
513 * FIXME either our parser or ffmpeg is broken */
515 if( p_sys->b_hurry_up )
516 p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
522 * Do the actual decoding now
525 /* Don't forget that ffmpeg requires a little more bytes
526 * that the real frame size */
527 if( p_block->i_buffer > 0 )
529 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
531 p_block = block_Realloc( p_block, 0,
532 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
535 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
537 memset( p_block->p_buffer + p_block->i_buffer, 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_sar_num || !p_dec->fmt_in.video.i_sar_den )
651 /* Fetch again the aspect ratio in case it changed */
652 p_dec->fmt_out.video.i_sar_num
653 = p_sys->p_context->sample_aspect_ratio.num;
654 p_dec->fmt_out.video.i_sar_den
655 = p_sys->p_context->sample_aspect_ratio.den;
657 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
659 p_dec->fmt_out.video.i_sar_num = 1;
660 p_dec->fmt_out.video.i_sar_den = 1;
664 /* Send decoded frame to vout */
667 p_pic->date = p_sys->i_pts;
669 ffmpeg_NextPts( p_dec );
671 if( p_sys->b_first_frame )
673 /* Hack to force display of still pictures */
674 p_sys->b_first_frame = false;
675 p_pic->b_force = true;
678 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
679 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
680 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
682 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
683 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
684 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
685 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
686 p_pic->i_qstride * i_mb_h );
687 switch( p_sys->p_ff_pic->qscale_type )
689 case FF_QSCALE_TYPE_MPEG1:
690 p_pic->i_qtype = QTYPE_MPEG1;
692 case FF_QSCALE_TYPE_MPEG2:
693 p_pic->i_qtype = QTYPE_MPEG2;
695 case FF_QSCALE_TYPE_H264:
696 p_pic->i_qtype = QTYPE_H264;
704 decoder_DeletePicture( p_dec, p_pic );
708 block_Release( p_block );
712 /*****************************************************************************
713 * EndVideo: decoder destruction
714 *****************************************************************************
715 * This function is called when the thread ends after a successful
717 *****************************************************************************/
718 void EndVideoDec( decoder_t *p_dec )
720 decoder_sys_t *p_sys = p_dec->p_sys;
722 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
723 if( p_sys->p_context->codec )
724 avcodec_flush_buffers( p_sys->p_context );
726 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
729 vlc_va_Delete( p_sys->p_va );
732 /*****************************************************************************
733 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
734 *****************************************************************************/
735 static void ffmpeg_InitCodec( decoder_t *p_dec )
737 decoder_sys_t *p_sys = p_dec->p_sys;
738 int i_size = p_dec->fmt_in.i_extra;
740 if( !i_size ) return;
742 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
746 p_sys->p_context->extradata_size = i_size + 12;
747 p = p_sys->p_context->extradata =
748 malloc( p_sys->p_context->extradata_size );
752 memcpy( &p[0], "SVQ3", 4 );
753 memset( &p[4], 0, 8 );
754 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
756 /* Now remove all atoms before the SMI one */
757 if( p_sys->p_context->extradata_size > 0x5a &&
758 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
760 uint8_t *psz = &p[0x52];
762 while( psz < &p[p_sys->p_context->extradata_size - 8] )
764 int i_size = GetDWBE( psz );
767 /* FIXME handle 1 as long size */
770 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
772 memmove( &p[0x52], psz,
773 &p[p_sys->p_context->extradata_size] - psz );
783 p_sys->p_context->extradata_size = i_size;
784 p_sys->p_context->extradata =
785 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
786 if( p_sys->p_context->extradata )
788 memcpy( p_sys->p_context->extradata,
789 p_dec->fmt_in.p_extra, i_size );
790 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
791 0, FF_INPUT_BUFFER_PADDING_SIZE );
796 /*****************************************************************************
798 *****************************************************************************/
799 static int ffmpeg_OpenCodec( decoder_t *p_dec )
801 decoder_sys_t *p_sys = p_dec->p_sys;
803 if( p_sys->p_context->extradata_size <= 0 )
805 if( p_sys->i_codec_id == CODEC_ID_VC1 ||
806 p_sys->i_codec_id == CODEC_ID_VORBIS ||
807 p_sys->i_codec_id == CODEC_ID_THEORA )
809 msg_Warn( p_dec, "waiting for extra data for codec %s",
810 p_sys->psz_namecodec );
814 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
815 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
816 #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(52, 0, 0)
817 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
819 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
824 ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
825 vlc_avcodec_unlock();
828 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
830 p_sys->b_delayed_open = false;
834 /*****************************************************************************
835 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
836 * picture_t structure (when not in direct rendering mode).
837 *****************************************************************************/
838 static void ffmpeg_CopyPicture( decoder_t *p_dec,
839 picture_t *p_pic, AVFrame *p_ff_pic )
841 decoder_sys_t *p_sys = p_dec->p_sys;
845 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
847 else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
849 int i_plane, i_size, i_line;
850 uint8_t *p_dst, *p_src;
851 int i_src_stride, i_dst_stride;
853 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
855 p_src = p_ff_pic->data[i_plane];
856 p_dst = p_pic->p[i_plane].p_pixels;
857 i_src_stride = p_ff_pic->linesize[i_plane];
858 i_dst_stride = p_pic->p[i_plane].i_pitch;
860 i_size = __MIN( i_src_stride, i_dst_stride );
861 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
864 vlc_memcpy( p_dst, p_src, i_size );
865 p_src += i_src_stride;
866 p_dst += i_dst_stride;
872 msg_Err( p_dec, "don't know how to convert chroma %i",
873 p_sys->p_context->pix_fmt );
878 /*****************************************************************************
879 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
880 *****************************************************************************
881 * It is used for direct rendering as well as to get the right PTS for each
882 * decoded picture (even in indirect rendering mode).
883 *****************************************************************************/
884 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
886 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
889 decoder_t *p_dec = (decoder_t *)p_context->opaque;
890 decoder_sys_t *p_sys = p_dec->p_sys;
893 /* Set picture PTS */
894 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
897 p_ff_pic->opaque = NULL;
901 #ifdef HAVE_AVCODEC_VA
902 /* hwaccel_context is not present in old fffmpeg version */
903 if( vlc_va_Setup( p_sys->p_va,
904 &p_sys->p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
905 p_sys->p_context->width, p_sys->p_context->height ) )
907 msg_Err( p_dec, "vlc_va_Setup failed" );
915 p_ff_pic->type = FF_BUFFER_TYPE_USER;
916 /* FIXME what is that, should give good value */
917 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
919 if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
921 msg_Err( p_dec, "VaGrabSurface failed" );
926 else if( !p_sys->b_direct_rendering )
928 /* Not much to do in indirect rendering mode */
929 return avcodec_default_get_buffer( p_context, p_ff_pic );
932 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
933 * so we need to check for direct rendering again. */
935 int i_width = p_sys->p_context->width;
936 int i_height = p_sys->p_context->height;
937 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
939 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
940 p_context->pix_fmt == PIX_FMT_PAL8 )
943 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
945 /* Get a new picture */
946 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
949 bool b_compatible = true;
950 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
951 p_pic->p[0].i_lines < i_height )
952 b_compatible = false;
953 for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
956 switch( p_sys->i_codec_id )
966 i_align = i == 0 ? 16 : 8;
969 if( p_pic->p[i].i_pitch % i_align )
970 b_compatible = false;
971 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
972 b_compatible = false;
974 if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
976 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
977 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
978 b_compatible = false;
982 decoder_DeletePicture( p_dec, p_pic );
986 if( p_sys->i_direct_rendering_used != 1 )
988 msg_Dbg( p_dec, "using direct rendering" );
989 p_sys->i_direct_rendering_used = 1;
992 p_sys->p_context->draw_horiz_band = NULL;
994 p_ff_pic->opaque = (void*)p_pic;
995 p_ff_pic->type = FF_BUFFER_TYPE_USER;
996 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
997 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
998 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
999 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1001 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1002 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1003 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1004 p_ff_pic->linesize[3] = 0;
1006 decoder_LinkPicture( p_dec, p_pic );
1008 /* FIXME what is that, should give good value */
1009 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
1014 if( p_sys->i_direct_rendering_used != 0 )
1016 msg_Warn( p_dec, "disabling direct rendering" );
1017 p_sys->i_direct_rendering_used = 0;
1019 return avcodec_default_get_buffer( p_context, p_ff_pic );
1021 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1023 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1027 p_ff_pic->pts = AV_NOPTS_VALUE;
1029 /* We always use default reget function, it works perfectly fine */
1030 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
1032 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
1033 * ffmpeg_GetFrameBuf call) */
1034 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
1035 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
1040 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
1042 decoder_sys_t *p_sys = p_dec->p_sys;
1044 /* Set picture PTS */
1045 if( p_sys->input_pts )
1047 p_ff_pic->pts = p_sys->input_pts;
1049 else if( p_sys->input_dts )
1051 /* Some demuxers only set the dts so let's try to find a useful
1052 * timestamp from this */
1053 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
1054 !p_ff_pic->reference || !p_sys->i_pts )
1056 p_ff_pic->pts = p_sys->input_dts;
1068 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
1070 p_sys->input_pts = p_sys->input_dts = 0;
1074 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1077 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1078 decoder_sys_t *p_sys = p_dec->p_sys;
1082 vlc_va_Release( p_sys->p_va, p_ff_pic );
1085 for( int i = 0; i < 4; i++ )
1086 p_ff_pic->data[i] = NULL;
1088 else if( !p_ff_pic->opaque )
1090 avcodec_default_release_buffer( p_context, p_ff_pic );
1094 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1096 decoder_UnlinkPicture( p_dec, p_pic );
1099 for( int i = 0; i < 4; i++ )
1100 p_ff_pic->data[i] = NULL;
1104 static void ffmpeg_NextPts( decoder_t *p_dec )
1106 decoder_sys_t *p_sys = p_dec->p_sys;
1108 if( p_sys->i_pts <= 0 )
1111 /* interpolate the next PTS */
1112 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1113 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1115 p_sys->i_pts += INT64_C(1000000) *
1116 (2 + p_sys->p_ff_pic->repeat_pict) *
1117 p_dec->fmt_in.video.i_frame_rate_base /
1118 (2 * p_dec->fmt_in.video.i_frame_rate);
1120 else if( p_sys->p_context->time_base.den > 0 )
1122 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52,20,0)
1123 int i_tick = p_sys->p_context->ticks_per_frame;
1130 p_sys->i_pts += INT64_C(1000000) *
1131 (2 + p_sys->p_ff_pic->repeat_pict) *
1132 i_tick * p_sys->p_context->time_base.num /
1133 (2 * p_sys->p_context->time_base.den);
1137 #ifdef HAVE_AVCODEC_VA
1138 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_codec,
1139 const enum PixelFormat *pi_fmt )
1141 decoder_t *p_dec = p_codec->opaque;
1142 decoder_sys_t *p_sys = p_dec->p_sys;
1146 vlc_va_Delete( p_sys->p_va );
1150 /* Try too look for a supported hw acceleration */
1151 for( int i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1153 static const char *ppsz_name[PIX_FMT_NB] = {
1154 [PIX_FMT_VDPAU_H264] = "PIX_FMT_VDPAU_H264",
1155 [PIX_FMT_VAAPI_IDCT] = "PIX_FMT_VAAPI_IDCT",
1156 [PIX_FMT_VAAPI_VLD] = "PIX_FMT_VAAPI_VLD",
1157 [PIX_FMT_VAAPI_MOCO] = "PIX_FMT_VAAPI_MOCO",
1158 #ifdef HAVE_AVCODEC_DXVA2
1159 [PIX_FMT_DXVA2_VLD] = "PIX_FMT_DXVA2_VLD",
1161 [PIX_FMT_YUYV422] = "PIX_FMT_YUYV422",
1162 [PIX_FMT_YUV420P] = "PIX_FMT_YUV420P",
1164 msg_Dbg( p_dec, "Available decoder output format %d (%s)", pi_fmt[i], ppsz_name[pi_fmt[i]] ?: "Unknown" );
1166 /* Only VLD supported */
1167 if( pi_fmt[i] == PIX_FMT_VAAPI_VLD )
1169 #ifdef HAVE_AVCODEC_VAAPI
1170 msg_Dbg( p_dec, "Trying VA API" );
1171 p_sys->p_va = vlc_va_NewVaapi( p_sys->i_codec_id );
1173 msg_Warn( p_dec, "Failed to open VA API" );
1178 #ifdef HAVE_AVCODEC_DXVA2
1179 if( pi_fmt[i] == PIX_FMT_DXVA2_VLD )
1181 msg_Dbg( p_dec, "Trying DXVA2" );
1182 p_sys->p_va = vlc_va_NewDxva2( VLC_OBJECT(p_dec), p_sys->i_codec_id );
1184 msg_Warn( p_dec, "Failed to open DXVA2" );
1189 p_sys->p_context->width > 0 && p_sys->p_context->height > 0 )
1191 /* We try to call vlc_va_Setup when possible to detect errors when
1192 * possible (later is too late) */
1193 if( vlc_va_Setup( p_sys->p_va,
1194 &p_sys->p_context->hwaccel_context,
1195 &p_dec->fmt_out.video.i_chroma,
1196 p_sys->p_context->width, p_sys->p_context->height ) )
1198 msg_Err( p_dec, "vlc_va_Setup failed" );
1199 vlc_va_Delete( p_sys->p_va );
1206 if( p_sys->p_va->description )
1207 msg_Info( p_dec, "Using %s for hardware decoding.", p_sys->p_va->description );
1209 /* FIXME this will disabled direct rendering
1210 * even if a new pixel format is renegociated
1212 p_sys->b_direct_rendering = false;
1213 p_sys->p_context->draw_horiz_band = NULL;
1218 /* Fallback to default behaviour */
1219 return avcodec_default_get_format( p_codec, pi_fmt );