2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/intmath.h"
22 #include "libavutil/log.h"
23 #include "libavutil/opt.h"
30 #include "rangecoder.h"
38 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
39 int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
43 //FIXME ugly misuse of obmc_stride
44 const uint8_t *obmc1= obmc + y*obmc_stride;
45 const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
46 const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
47 const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
48 dst = slice_buffer_get_line(sb, src_y + y);
50 int v= obmc1[x] * block[3][x + y*src_stride]
51 +obmc2[x] * block[2][x + y*src_stride]
52 +obmc3[x] * block[1][x + y*src_stride]
53 +obmc4[x] * block[0][x + y*src_stride];
55 v <<= 8 - LOG2_OBMC_MAX;
61 v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
62 if(v&(~255)) v= ~(v>>31);
63 dst8[x + y*src_stride] = v;
71 void ff_snow_reset_contexts(SnowContext *s){ //FIXME better initial contexts
72 int plane_index, level, orientation;
74 for(plane_index=0; plane_index<3; plane_index++){
75 for(level=0; level<MAX_DECOMPOSITIONS; level++){
76 for(orientation=level ? 1:0; orientation<4; orientation++){
77 memset(s->plane[plane_index].band[level][orientation].state, MID_STATE, sizeof(s->plane[plane_index].band[level][orientation].state));
81 memset(s->header_state, MID_STATE, sizeof(s->header_state));
82 memset(s->block_state, MID_STATE, sizeof(s->block_state));
85 int ff_snow_alloc_blocks(SnowContext *s){
86 int w= -((-s->avctx->width )>>LOG2_MB_SIZE);
87 int h= -((-s->avctx->height)>>LOG2_MB_SIZE);
93 s->block= av_mallocz(w * h * sizeof(BlockNode) << (s->block_max_depth*2));
97 static void init_qexp(void){
101 for(i=0; i<QROOT; i++){
102 ff_qexp[i]= lrintf(v);
103 v *= pow(2, 1.0 / QROOT);
106 static void mc_block(Plane *p, uint8_t *dst, const uint8_t *src, int stride, int b_w, int b_h, int dx, int dy){
107 static const uint8_t weight[64]={
118 static const uint8_t brane[256]={
119 0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x11,0x12,0x12,0x12,0x12,0x12,0x12,0x12,
120 0x04,0x05,0xcc,0xcc,0xcc,0xcc,0xcc,0x41,0x15,0x16,0xcc,0xcc,0xcc,0xcc,0xcc,0x52,
121 0x04,0xcc,0x05,0xcc,0xcc,0xcc,0x41,0xcc,0x15,0xcc,0x16,0xcc,0xcc,0xcc,0x52,0xcc,
122 0x04,0xcc,0xcc,0x05,0xcc,0x41,0xcc,0xcc,0x15,0xcc,0xcc,0x16,0xcc,0x52,0xcc,0xcc,
123 0x04,0xcc,0xcc,0xcc,0x41,0xcc,0xcc,0xcc,0x15,0xcc,0xcc,0xcc,0x16,0xcc,0xcc,0xcc,
124 0x04,0xcc,0xcc,0x41,0xcc,0x05,0xcc,0xcc,0x15,0xcc,0xcc,0x52,0xcc,0x16,0xcc,0xcc,
125 0x04,0xcc,0x41,0xcc,0xcc,0xcc,0x05,0xcc,0x15,0xcc,0x52,0xcc,0xcc,0xcc,0x16,0xcc,
126 0x04,0x41,0xcc,0xcc,0xcc,0xcc,0xcc,0x05,0x15,0x52,0xcc,0xcc,0xcc,0xcc,0xcc,0x16,
127 0x44,0x45,0x45,0x45,0x45,0x45,0x45,0x45,0x55,0x56,0x56,0x56,0x56,0x56,0x56,0x56,
128 0x48,0x49,0xcc,0xcc,0xcc,0xcc,0xcc,0x85,0x59,0x5A,0xcc,0xcc,0xcc,0xcc,0xcc,0x96,
129 0x48,0xcc,0x49,0xcc,0xcc,0xcc,0x85,0xcc,0x59,0xcc,0x5A,0xcc,0xcc,0xcc,0x96,0xcc,
130 0x48,0xcc,0xcc,0x49,0xcc,0x85,0xcc,0xcc,0x59,0xcc,0xcc,0x5A,0xcc,0x96,0xcc,0xcc,
131 0x48,0xcc,0xcc,0xcc,0x49,0xcc,0xcc,0xcc,0x59,0xcc,0xcc,0xcc,0x96,0xcc,0xcc,0xcc,
132 0x48,0xcc,0xcc,0x85,0xcc,0x49,0xcc,0xcc,0x59,0xcc,0xcc,0x96,0xcc,0x5A,0xcc,0xcc,
133 0x48,0xcc,0x85,0xcc,0xcc,0xcc,0x49,0xcc,0x59,0xcc,0x96,0xcc,0xcc,0xcc,0x5A,0xcc,
134 0x48,0x85,0xcc,0xcc,0xcc,0xcc,0xcc,0x49,0x59,0x96,0xcc,0xcc,0xcc,0xcc,0xcc,0x5A,
137 static const uint8_t needs[16]={
145 int16_t tmpIt [64*(32+HTAPS_MAX)];
146 uint8_t tmp2t[3][stride*(32+HTAPS_MAX)];
147 int16_t *tmpI= tmpIt;
148 uint8_t *tmp2= tmp2t[0];
149 const uint8_t *hpel[11];
150 assert(dx<16 && dy<16);
151 r= brane[dx + 16*dy]&15;
152 l= brane[dx + 16*dy]>>4;
154 b= needs[l] | needs[r];
159 for(y=0; y < b_h+HTAPS_MAX-1; y++){
160 for(x=0; x < b_w; x++){
161 int a_1=src[x + HTAPS_MAX/2-4];
162 int a0= src[x + HTAPS_MAX/2-3];
163 int a1= src[x + HTAPS_MAX/2-2];
164 int a2= src[x + HTAPS_MAX/2-1];
165 int a3= src[x + HTAPS_MAX/2+0];
166 int a4= src[x + HTAPS_MAX/2+1];
167 int a5= src[x + HTAPS_MAX/2+2];
168 int a6= src[x + HTAPS_MAX/2+3];
170 if(!p || p->fast_mc){
171 am= 20*(a2+a3) - 5*(a1+a4) + (a0+a5);
175 am= p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6);
180 if(am&(~255)) am= ~(am>>31);
189 src += HTAPS_MAX/2 - 1;
193 for(y=0; y < b_h; y++){
194 for(x=0; x < b_w+1; x++){
195 int a_1=src[x + (HTAPS_MAX/2-4)*stride];
196 int a0= src[x + (HTAPS_MAX/2-3)*stride];
197 int a1= src[x + (HTAPS_MAX/2-2)*stride];
198 int a2= src[x + (HTAPS_MAX/2-1)*stride];
199 int a3= src[x + (HTAPS_MAX/2+0)*stride];
200 int a4= src[x + (HTAPS_MAX/2+1)*stride];
201 int a5= src[x + (HTAPS_MAX/2+2)*stride];
202 int a6= src[x + (HTAPS_MAX/2+3)*stride];
205 am= (20*(a2+a3) - 5*(a1+a4) + (a0+a5) + 16)>>5;
207 am= (p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6) + 32)>>6;
209 if(am&(~255)) am= ~(am>>31);
217 src += stride*(HTAPS_MAX/2 - 1);
221 for(y=0; y < b_h; y++){
222 for(x=0; x < b_w; x++){
223 int a_1=tmpI[x + (HTAPS_MAX/2-4)*64];
224 int a0= tmpI[x + (HTAPS_MAX/2-3)*64];
225 int a1= tmpI[x + (HTAPS_MAX/2-2)*64];
226 int a2= tmpI[x + (HTAPS_MAX/2-1)*64];
227 int a3= tmpI[x + (HTAPS_MAX/2+0)*64];
228 int a4= tmpI[x + (HTAPS_MAX/2+1)*64];
229 int a5= tmpI[x + (HTAPS_MAX/2+2)*64];
230 int a6= tmpI[x + (HTAPS_MAX/2+3)*64];
233 am= (20*(a2+a3) - 5*(a1+a4) + (a0+a5) + 512)>>10;
235 am= (p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6) + 2048)>>12;
236 if(am&(~255)) am= ~(am>>31);
245 hpel[ 1]= tmp2t[0] + stride*(HTAPS_MAX/2-1);
250 hpel[ 6]= tmp2t[1] + 1;
252 hpel[ 8]= src + stride;
253 hpel[ 9]= hpel[1] + stride;
254 hpel[10]= hpel[8] + 1;
257 const uint8_t *src1= hpel[dx/8 + dy/8*4 ];
258 const uint8_t *src2= hpel[dx/8 + dy/8*4+1];
259 const uint8_t *src3= hpel[dx/8 + dy/8*4+4];
260 const uint8_t *src4= hpel[dx/8 + dy/8*4+5];
263 for(y=0; y < b_h; y++){
264 for(x=0; x < b_w; x++){
265 dst[x]= ((8-dx)*(8-dy)*src1[x] + dx*(8-dy)*src2[x]+
266 (8-dx)* dy *src3[x] + dx* dy *src4[x]+32)>>6;
275 const uint8_t *src1= hpel[l];
276 const uint8_t *src2= hpel[r];
277 int a= weight[((dx&7) + (8*(dy&7)))];
279 for(y=0; y < b_h; y++){
280 for(x=0; x < b_w; x++){
281 dst[x]= (a*src1[x] + b*src2[x] + 4)>>3;
290 void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride, int sx, int sy, int b_w, int b_h, BlockNode *block, int plane_index, int w, int h){
291 if(block->type & BLOCK_INTRA){
293 const unsigned color = block->color[plane_index];
294 const unsigned color4 = color*0x01010101;
296 for(y=0; y < b_h; y++){
297 *(uint32_t*)&dst[0 + y*stride]= color4;
298 *(uint32_t*)&dst[4 + y*stride]= color4;
299 *(uint32_t*)&dst[8 + y*stride]= color4;
300 *(uint32_t*)&dst[12+ y*stride]= color4;
301 *(uint32_t*)&dst[16+ y*stride]= color4;
302 *(uint32_t*)&dst[20+ y*stride]= color4;
303 *(uint32_t*)&dst[24+ y*stride]= color4;
304 *(uint32_t*)&dst[28+ y*stride]= color4;
307 for(y=0; y < b_h; y++){
308 *(uint32_t*)&dst[0 + y*stride]= color4;
309 *(uint32_t*)&dst[4 + y*stride]= color4;
310 *(uint32_t*)&dst[8 + y*stride]= color4;
311 *(uint32_t*)&dst[12+ y*stride]= color4;
314 for(y=0; y < b_h; y++){
315 *(uint32_t*)&dst[0 + y*stride]= color4;
316 *(uint32_t*)&dst[4 + y*stride]= color4;
319 for(y=0; y < b_h; y++){
320 *(uint32_t*)&dst[0 + y*stride]= color4;
323 for(y=0; y < b_h; y++){
324 for(x=0; x < b_w; x++){
325 dst[x + y*stride]= color;
330 uint8_t *src= s->last_picture[block->ref].data[plane_index];
331 const int scale= plane_index ? s->mv_scale : 2*s->mv_scale;
332 int mx= block->mx*scale;
333 int my= block->my*scale;
336 const int tab_index= 3 - (b_w>>2) + (b_w>>4);
337 sx += (mx>>4) - (HTAPS_MAX/2-1);
338 sy += (my>>4) - (HTAPS_MAX/2-1);
339 src += sx + sy*stride;
340 if( (unsigned)sx >= w - b_w - (HTAPS_MAX-2)
341 || (unsigned)sy >= h - b_h - (HTAPS_MAX-2)){
342 s->dsp.emulated_edge_mc(tmp + MB_SIZE, src, stride, b_w+HTAPS_MAX-1, b_h+HTAPS_MAX-1, sx, sy, w, h);
345 // assert(b_w == b_h || 2*b_w == b_h || b_w == 2*b_h);
346 // assert(!(b_w&(b_w-1)));
347 assert(b_w>1 && b_h>1);
348 assert((tab_index>=0 && tab_index<4) || b_w==32);
349 if((dx&3) || (dy&3) || !(b_w == b_h || 2*b_w == b_h || b_w == 2*b_h) || (b_w&(b_w-1)) || !s->plane[plane_index].fast_mc )
350 mc_block(&s->plane[plane_index], dst, src, stride, b_w, b_h, dx, dy);
353 for(y=0; y<b_h; y+=16){
354 s->dsp.put_h264_qpel_pixels_tab[0][dy+(dx>>2)](dst + y*stride, src + 3 + (y+3)*stride,stride);
355 s->dsp.put_h264_qpel_pixels_tab[0][dy+(dx>>2)](dst + 16 + y*stride, src + 19 + (y+3)*stride,stride);
358 s->dsp.put_h264_qpel_pixels_tab[tab_index ][dy+(dx>>2)](dst,src + 3 + 3*stride,stride);
360 s->dsp.put_h264_qpel_pixels_tab[tab_index+1][dy+(dx>>2)](dst ,src + 3 + 3*stride,stride);
361 s->dsp.put_h264_qpel_pixels_tab[tab_index+1][dy+(dx>>2)](dst+b_h,src + 3 + b_h + 3*stride,stride);
364 s->dsp.put_h264_qpel_pixels_tab[tab_index ][dy+(dx>>2)](dst ,src + 3 + 3*stride ,stride);
365 s->dsp.put_h264_qpel_pixels_tab[tab_index ][dy+(dx>>2)](dst+b_w*stride,src + 3 + 3*stride+b_w*stride,stride);
370 #define mca(dx,dy,b_w)\
371 static void mc_block_hpel ## dx ## dy ## b_w(uint8_t *dst, const uint8_t *src, int stride, int h){\
373 mc_block(NULL, dst, src-(HTAPS_MAX/2-1)-(HTAPS_MAX/2-1)*stride, stride, b_w, b_w, dx, dy);\
385 av_cold int ff_snow_common_init(AVCodecContext *avctx){
386 SnowContext *s = avctx->priv_data;
391 s->max_ref_frames=1; //just make sure its not an invalid value in case of no initial keyframe
393 ff_dsputil_init(&s->dsp, avctx);
394 ff_dwt_init(&s->dwt);
397 s->dsp.put_qpel_pixels_tab [0][dy+dx/4]=\
398 s->dsp.put_no_rnd_qpel_pixels_tab[0][dy+dx/4]=\
399 s->dsp.put_h264_qpel_pixels_tab[0][dy+dx/4];\
400 s->dsp.put_qpel_pixels_tab [1][dy+dx/4]=\
401 s->dsp.put_no_rnd_qpel_pixels_tab[1][dy+dx/4]=\
402 s->dsp.put_h264_qpel_pixels_tab[1][dy+dx/4];
422 s->dsp.put_pixels_tab [0][dy/4+dx/8]=\
423 s->dsp.put_no_rnd_pixels_tab[0][dy/4+dx/8]=\
424 mc_block_hpel ## dx ## dy ## 16;\
425 s->dsp.put_pixels_tab [1][dy/4+dx/8]=\
426 s->dsp.put_no_rnd_pixels_tab[1][dy/4+dx/8]=\
427 mc_block_hpel ## dx ## dy ## 8;
436 // dec += FFMAX(s->chroma_h_shift, s->chroma_v_shift);
438 width= s->avctx->width;
439 height= s->avctx->height;
441 s->spatial_idwt_buffer= av_mallocz(width*height*sizeof(IDWTELEM));
442 s->spatial_dwt_buffer= av_mallocz(width*height*sizeof(DWTELEM)); //FIXME this does not belong here
444 for(i=0; i<MAX_REF_FRAMES; i++)
445 for(j=0; j<MAX_REF_FRAMES; j++)
446 ff_scale_mv_ref[i][j] = 256*(i+1)/(j+1);
448 s->avctx->get_buffer(s->avctx, &s->mconly_picture);
449 s->scratchbuf = av_malloc(s->mconly_picture.linesize[0]*7*MB_SIZE);
454 int ff_snow_common_init_after_header(AVCodecContext *avctx) {
455 SnowContext *s = avctx->priv_data;
456 int plane_index, level, orientation;
458 for(plane_index=0; plane_index<3; plane_index++){
459 int w= s->avctx->width;
460 int h= s->avctx->height;
463 w>>= s->chroma_h_shift;
464 h>>= s->chroma_v_shift;
466 s->plane[plane_index].width = w;
467 s->plane[plane_index].height= h;
469 for(level=s->spatial_decomposition_count-1; level>=0; level--){
470 for(orientation=level ? 1 : 0; orientation<4; orientation++){
471 SubBand *b= &s->plane[plane_index].band[level][orientation];
473 b->buf= s->spatial_dwt_buffer;
475 b->stride= s->plane[plane_index].width << (s->spatial_decomposition_count - level);
476 b->width = (w + !(orientation&1))>>1;
477 b->height= (h + !(orientation>1))>>1;
479 b->stride_line = 1 << (s->spatial_decomposition_count - level);
485 b->buf_x_offset = (w+1)>>1;
488 b->buf += b->stride>>1;
489 b->buf_y_offset = b->stride_line >> 1;
491 b->ibuf= s->spatial_idwt_buffer + (b->buf - s->spatial_dwt_buffer);
494 b->parent= &s->plane[plane_index].band[level-1][orientation];
495 //FIXME avoid this realloc
496 av_freep(&b->x_coeff);
497 b->x_coeff=av_mallocz(((b->width+1) * b->height+1)*sizeof(x_and_coeff));
507 #define USE_HALFPEL_PLANE 0
509 static void halfpel_interpol(SnowContext *s, uint8_t *halfpel[4][4], AVFrame *frame){
514 int w= s->avctx->width >>is_chroma;
515 int h= s->avctx->height >>is_chroma;
516 int ls= frame->linesize[p];
517 uint8_t *src= frame->data[p];
519 halfpel[1][p] = (uint8_t*) av_malloc(ls * (h + 2 * EDGE_WIDTH)) + EDGE_WIDTH * (1 + ls);
520 halfpel[2][p] = (uint8_t*) av_malloc(ls * (h + 2 * EDGE_WIDTH)) + EDGE_WIDTH * (1 + ls);
521 halfpel[3][p] = (uint8_t*) av_malloc(ls * (h + 2 * EDGE_WIDTH)) + EDGE_WIDTH * (1 + ls);
528 halfpel[1][p][i]= (20*(src[i] + src[i+1]) - 5*(src[i-1] + src[i+2]) + (src[i-2] + src[i+3]) + 16 )>>5;
535 halfpel[2][p][i]= (20*(src[i] + src[i+ls]) - 5*(src[i-ls] + src[i+2*ls]) + (src[i-2*ls] + src[i+3*ls]) + 16 )>>5;
543 halfpel[3][p][i]= (20*(src[i] + src[i+ls]) - 5*(src[i-ls] + src[i+2*ls]) + (src[i-2*ls] + src[i+3*ls]) + 16 )>>5;
551 void ff_snow_release_buffer(AVCodecContext *avctx)
553 SnowContext *s = avctx->priv_data;
556 if(s->last_picture[s->max_ref_frames-1].data[0]){
557 avctx->release_buffer(avctx, &s->last_picture[s->max_ref_frames-1]);
559 if(s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3])
560 av_free(s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3] - EDGE_WIDTH*(1+s->current_picture.linesize[i%3]));
564 int ff_snow_frame_start(SnowContext *s){
566 int w= s->avctx->width; //FIXME round up to x16 ?
567 int h= s->avctx->height;
569 if (s->current_picture.data[0] && !(s->avctx->flags&CODEC_FLAG_EMU_EDGE)) {
570 s->dsp.draw_edges(s->current_picture.data[0],
571 s->current_picture.linesize[0], w , h ,
572 EDGE_WIDTH , EDGE_WIDTH , EDGE_TOP | EDGE_BOTTOM);
573 s->dsp.draw_edges(s->current_picture.data[1],
574 s->current_picture.linesize[1], w>>1, h>>1,
575 EDGE_WIDTH/2, EDGE_WIDTH/2, EDGE_TOP | EDGE_BOTTOM);
576 s->dsp.draw_edges(s->current_picture.data[2],
577 s->current_picture.linesize[2], w>>1, h>>1,
578 EDGE_WIDTH/2, EDGE_WIDTH/2, EDGE_TOP | EDGE_BOTTOM);
581 ff_snow_release_buffer(s->avctx);
583 tmp= s->last_picture[s->max_ref_frames-1];
584 memmove(s->last_picture+1, s->last_picture, (s->max_ref_frames-1)*sizeof(AVFrame));
585 memmove(s->halfpel_plane+1, s->halfpel_plane, (s->max_ref_frames-1)*sizeof(void*)*4*4);
586 if(USE_HALFPEL_PLANE && s->current_picture.data[0])
587 halfpel_interpol(s, s->halfpel_plane[0], &s->current_picture);
588 s->last_picture[0]= s->current_picture;
589 s->current_picture= tmp;
595 for(i=0; i<s->max_ref_frames && s->last_picture[i].data[0]; i++)
596 if(i && s->last_picture[i-1].key_frame)
599 if(s->ref_frames==0){
600 av_log(s->avctx,AV_LOG_ERROR, "No reference frames\n");
605 s->current_picture.reference= 3;
606 if(s->avctx->get_buffer(s->avctx, &s->current_picture) < 0){
607 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
611 s->current_picture.key_frame= s->keyframe;
616 av_cold void ff_snow_common_end(SnowContext *s)
618 int plane_index, level, orientation, i;
620 av_freep(&s->spatial_dwt_buffer);
621 av_freep(&s->spatial_idwt_buffer);
624 av_freep(&s->m.me.scratchpad);
625 av_freep(&s->m.me.map);
626 av_freep(&s->m.me.score_map);
627 av_freep(&s->m.obmc_scratchpad);
630 av_freep(&s->scratchbuf);
632 for(i=0; i<MAX_REF_FRAMES; i++){
633 av_freep(&s->ref_mvs[i]);
634 av_freep(&s->ref_scores[i]);
635 if(s->last_picture[i].data[0])
636 s->avctx->release_buffer(s->avctx, &s->last_picture[i]);
639 for(plane_index=0; plane_index<3; plane_index++){
640 for(level=s->spatial_decomposition_count-1; level>=0; level--){
641 for(orientation=level ? 1 : 0; orientation<4; orientation++){
642 SubBand *b= &s->plane[plane_index].band[level][orientation];
644 av_freep(&b->x_coeff);
648 if (s->mconly_picture.data[0])
649 s->avctx->release_buffer(s->avctx, &s->mconly_picture);
650 if (s->current_picture.data[0])
651 s->avctx->release_buffer(s->avctx, &s->current_picture);