Libav 0.7.1
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00001 00024 #include "avcodec.h" 00025 #include "bytestream.h" 00026 00027 #include "vp56.h" 00028 #include "vp56data.h" 00029 00030 00031 void ff_vp56_init_dequant(VP56Context *s, int quantizer) 00032 { 00033 s->quantizer = quantizer; 00034 s->dequant_dc = vp56_dc_dequant[quantizer] << 2; 00035 s->dequant_ac = vp56_ac_dequant[quantizer] << 2; 00036 memset(s->qscale_table, quantizer, s->mb_width); 00037 } 00038 00039 static int vp56_get_vectors_predictors(VP56Context *s, int row, int col, 00040 VP56Frame ref_frame) 00041 { 00042 int nb_pred = 0; 00043 VP56mv vect[2] = {{0,0}, {0,0}}; 00044 int pos, offset; 00045 VP56mv mvp; 00046 00047 for (pos=0; pos<12; pos++) { 00048 mvp.x = col + vp56_candidate_predictor_pos[pos][0]; 00049 mvp.y = row + vp56_candidate_predictor_pos[pos][1]; 00050 if (mvp.x < 0 || mvp.x >= s->mb_width || 00051 mvp.y < 0 || mvp.y >= s->mb_height) 00052 continue; 00053 offset = mvp.x + s->mb_width*mvp.y; 00054 00055 if (vp56_reference_frame[s->macroblocks[offset].type] != ref_frame) 00056 continue; 00057 if ((s->macroblocks[offset].mv.x == vect[0].x && 00058 s->macroblocks[offset].mv.y == vect[0].y) || 00059 (s->macroblocks[offset].mv.x == 0 && 00060 s->macroblocks[offset].mv.y == 0)) 00061 continue; 00062 00063 vect[nb_pred++] = s->macroblocks[offset].mv; 00064 if (nb_pred > 1) { 00065 nb_pred = -1; 00066 break; 00067 } 00068 s->vector_candidate_pos = pos; 00069 } 00070 00071 s->vector_candidate[0] = vect[0]; 00072 s->vector_candidate[1] = vect[1]; 00073 00074 return nb_pred+1; 00075 } 00076 00077 static void vp56_parse_mb_type_models(VP56Context *s) 00078 { 00079 VP56RangeCoder *c = &s->c; 00080 VP56Model *model = s->modelp; 00081 int i, ctx, type; 00082 00083 for (ctx=0; ctx<3; ctx++) { 00084 if (vp56_rac_get_prob(c, 174)) { 00085 int idx = vp56_rac_gets(c, 4); 00086 memcpy(model->mb_types_stats[ctx], 00087 vp56_pre_def_mb_type_stats[idx][ctx], 00088 sizeof(model->mb_types_stats[ctx])); 00089 } 00090 if (vp56_rac_get_prob(c, 254)) { 00091 for (type=0; type<10; type++) { 00092 for(i=0; i<2; i++) { 00093 if (vp56_rac_get_prob(c, 205)) { 00094 int delta, sign = vp56_rac_get(c); 00095 00096 delta = vp56_rac_get_tree(c, vp56_pmbtm_tree, 00097 vp56_mb_type_model_model); 00098 if (!delta) 00099 delta = 4 * vp56_rac_gets(c, 7); 00100 model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign; 00101 } 00102 } 00103 } 00104 } 00105 } 00106 00107 /* compute MB type probability tables based on previous MB type */ 00108 for (ctx=0; ctx<3; ctx++) { 00109 int p[10]; 00110 00111 for (type=0; type<10; type++) 00112 p[type] = 100 * model->mb_types_stats[ctx][type][1]; 00113 00114 for (type=0; type<10; type++) { 00115 int p02, p34, p0234, p17, p56, p89, p5689, p156789; 00116 00117 /* conservative MB type probability */ 00118 model->mb_type[ctx][type][0] = 255 - (255 * model->mb_types_stats[ctx][type][0]) / (1 + model->mb_types_stats[ctx][type][0] + model->mb_types_stats[ctx][type][1]); 00119 00120 p[type] = 0; /* same MB type => weight is null */ 00121 00122 /* binary tree parsing probabilities */ 00123 p02 = p[0] + p[2]; 00124 p34 = p[3] + p[4]; 00125 p0234 = p02 + p34; 00126 p17 = p[1] + p[7]; 00127 p56 = p[5] + p[6]; 00128 p89 = p[8] + p[9]; 00129 p5689 = p56 + p89; 00130 p156789 = p17 + p5689; 00131 00132 model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789); 00133 model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234); 00134 model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789); 00135 model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02); 00136 model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34); 00137 model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17); 00138 model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689); 00139 model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56); 00140 model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89); 00141 00142 /* restore initial value */ 00143 p[type] = 100 * model->mb_types_stats[ctx][type][1]; 00144 } 00145 } 00146 } 00147 00148 static VP56mb vp56_parse_mb_type(VP56Context *s, 00149 VP56mb prev_type, int ctx) 00150 { 00151 uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type]; 00152 VP56RangeCoder *c = &s->c; 00153 00154 if (vp56_rac_get_prob(c, mb_type_model[0])) 00155 return prev_type; 00156 else 00157 return vp56_rac_get_tree(c, vp56_pmbt_tree, mb_type_model); 00158 } 00159 00160 static void vp56_decode_4mv(VP56Context *s, int row, int col) 00161 { 00162 VP56mv mv = {0,0}; 00163 int type[4]; 00164 int b; 00165 00166 /* parse each block type */ 00167 for (b=0; b<4; b++) { 00168 type[b] = vp56_rac_gets(&s->c, 2); 00169 if (type[b]) 00170 type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */ 00171 } 00172 00173 /* get vectors */ 00174 for (b=0; b<4; b++) { 00175 switch (type[b]) { 00176 case VP56_MB_INTER_NOVEC_PF: 00177 s->mv[b] = (VP56mv) {0,0}; 00178 break; 00179 case VP56_MB_INTER_DELTA_PF: 00180 s->parse_vector_adjustment(s, &s->mv[b]); 00181 break; 00182 case VP56_MB_INTER_V1_PF: 00183 s->mv[b] = s->vector_candidate[0]; 00184 break; 00185 case VP56_MB_INTER_V2_PF: 00186 s->mv[b] = s->vector_candidate[1]; 00187 break; 00188 } 00189 mv.x += s->mv[b].x; 00190 mv.y += s->mv[b].y; 00191 } 00192 00193 /* this is the one selected for the whole MB for prediction */ 00194 s->macroblocks[row * s->mb_width + col].mv = s->mv[3]; 00195 00196 /* chroma vectors are average luma vectors */ 00197 if (s->avctx->codec->id == CODEC_ID_VP5) { 00198 s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2); 00199 s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2); 00200 } else { 00201 s->mv[4] = s->mv[5] = (VP56mv) {mv.x/4, mv.y/4}; 00202 } 00203 } 00204 00205 static VP56mb vp56_decode_mv(VP56Context *s, int row, int col) 00206 { 00207 VP56mv *mv, vect = {0,0}; 00208 int ctx, b; 00209 00210 ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS); 00211 s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx); 00212 s->macroblocks[row * s->mb_width + col].type = s->mb_type; 00213 00214 switch (s->mb_type) { 00215 case VP56_MB_INTER_V1_PF: 00216 mv = &s->vector_candidate[0]; 00217 break; 00218 00219 case VP56_MB_INTER_V2_PF: 00220 mv = &s->vector_candidate[1]; 00221 break; 00222 00223 case VP56_MB_INTER_V1_GF: 00224 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); 00225 mv = &s->vector_candidate[0]; 00226 break; 00227 00228 case VP56_MB_INTER_V2_GF: 00229 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); 00230 mv = &s->vector_candidate[1]; 00231 break; 00232 00233 case VP56_MB_INTER_DELTA_PF: 00234 s->parse_vector_adjustment(s, &vect); 00235 mv = &vect; 00236 break; 00237 00238 case VP56_MB_INTER_DELTA_GF: 00239 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); 00240 s->parse_vector_adjustment(s, &vect); 00241 mv = &vect; 00242 break; 00243 00244 case VP56_MB_INTER_4V: 00245 vp56_decode_4mv(s, row, col); 00246 return s->mb_type; 00247 00248 default: 00249 mv = &vect; 00250 break; 00251 } 00252 00253 s->macroblocks[row*s->mb_width + col].mv = *mv; 00254 00255 /* same vector for all blocks */ 00256 for (b=0; b<6; b++) 00257 s->mv[b] = *mv; 00258 00259 return s->mb_type; 00260 } 00261 00262 static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame) 00263 { 00264 int idx = s->scantable.permutated[0]; 00265 int b; 00266 00267 for (b=0; b<6; b++) { 00268 VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]]; 00269 VP56RefDc *lb = &s->left_block[vp56_b6to4[b]]; 00270 int count = 0; 00271 int dc = 0; 00272 int i; 00273 00274 if (ref_frame == lb->ref_frame) { 00275 dc += lb->dc_coeff; 00276 count++; 00277 } 00278 if (ref_frame == ab->ref_frame) { 00279 dc += ab->dc_coeff; 00280 count++; 00281 } 00282 if (s->avctx->codec->id == CODEC_ID_VP5) 00283 for (i=0; i<2; i++) 00284 if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) { 00285 dc += ab[-1+2*i].dc_coeff; 00286 count++; 00287 } 00288 if (count == 0) 00289 dc = s->prev_dc[vp56_b2p[b]][ref_frame]; 00290 else if (count == 2) 00291 dc /= 2; 00292 00293 s->block_coeff[b][idx] += dc; 00294 s->prev_dc[vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx]; 00295 ab->dc_coeff = s->block_coeff[b][idx]; 00296 ab->ref_frame = ref_frame; 00297 lb->dc_coeff = s->block_coeff[b][idx]; 00298 lb->ref_frame = ref_frame; 00299 s->block_coeff[b][idx] *= s->dequant_dc; 00300 } 00301 } 00302 00303 static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv, 00304 int stride, int dx, int dy) 00305 { 00306 int t = vp56_filter_threshold[s->quantizer]; 00307 if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t); 00308 if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t); 00309 } 00310 00311 static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src, 00312 int stride, int x, int y) 00313 { 00314 uint8_t *dst=s->framep[VP56_FRAME_CURRENT]->data[plane]+s->block_offset[b]; 00315 uint8_t *src_block; 00316 int src_offset; 00317 int overlap_offset = 0; 00318 int mask = s->vp56_coord_div[b] - 1; 00319 int deblock_filtering = s->deblock_filtering; 00320 int dx; 00321 int dy; 00322 00323 if (s->avctx->skip_loop_filter >= AVDISCARD_ALL || 00324 (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY 00325 && !s->framep[VP56_FRAME_CURRENT]->key_frame)) 00326 deblock_filtering = 0; 00327 00328 dx = s->mv[b].x / s->vp56_coord_div[b]; 00329 dy = s->mv[b].y / s->vp56_coord_div[b]; 00330 00331 if (b >= 4) { 00332 x /= 2; 00333 y /= 2; 00334 } 00335 x += dx - 2; 00336 y += dy - 2; 00337 00338 if (x<0 || x+12>=s->plane_width[plane] || 00339 y<0 || y+12>=s->plane_height[plane]) { 00340 s->dsp.emulated_edge_mc(s->edge_emu_buffer, 00341 src + s->block_offset[b] + (dy-2)*stride + (dx-2), 00342 stride, 12, 12, x, y, 00343 s->plane_width[plane], 00344 s->plane_height[plane]); 00345 src_block = s->edge_emu_buffer; 00346 src_offset = 2 + 2*stride; 00347 } else if (deblock_filtering) { 00348 /* only need a 12x12 block, but there is no such dsp function, */ 00349 /* so copy a 16x12 block */ 00350 s->dsp.put_pixels_tab[0][0](s->edge_emu_buffer, 00351 src + s->block_offset[b] + (dy-2)*stride + (dx-2), 00352 stride, 12); 00353 src_block = s->edge_emu_buffer; 00354 src_offset = 2 + 2*stride; 00355 } else { 00356 src_block = src; 00357 src_offset = s->block_offset[b] + dy*stride + dx; 00358 } 00359 00360 if (deblock_filtering) 00361 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7); 00362 00363 if (s->mv[b].x & mask) 00364 overlap_offset += (s->mv[b].x > 0) ? 1 : -1; 00365 if (s->mv[b].y & mask) 00366 overlap_offset += (s->mv[b].y > 0) ? stride : -stride; 00367 00368 if (overlap_offset) { 00369 if (s->filter) 00370 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset, 00371 stride, s->mv[b], mask, s->filter_selection, b<4); 00372 else 00373 s->dsp.put_no_rnd_pixels_l2[1](dst, src_block+src_offset, 00374 src_block+src_offset+overlap_offset, 00375 stride, 8); 00376 } else { 00377 s->dsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8); 00378 } 00379 } 00380 00381 static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha) 00382 { 00383 AVFrame *frame_current, *frame_ref; 00384 VP56mb mb_type; 00385 VP56Frame ref_frame; 00386 int b, ab, b_max, plane, off; 00387 00388 if (s->framep[VP56_FRAME_CURRENT]->key_frame) 00389 mb_type = VP56_MB_INTRA; 00390 else 00391 mb_type = vp56_decode_mv(s, row, col); 00392 ref_frame = vp56_reference_frame[mb_type]; 00393 00394 s->dsp.clear_blocks(*s->block_coeff); 00395 00396 s->parse_coeff(s); 00397 00398 vp56_add_predictors_dc(s, ref_frame); 00399 00400 frame_current = s->framep[VP56_FRAME_CURRENT]; 00401 frame_ref = s->framep[ref_frame]; 00402 00403 ab = 6*is_alpha; 00404 b_max = 6 - 2*is_alpha; 00405 00406 switch (mb_type) { 00407 case VP56_MB_INTRA: 00408 for (b=0; b<b_max; b++) { 00409 plane = vp56_b2p[b+ab]; 00410 s->dsp.idct_put(frame_current->data[plane] + s->block_offset[b], 00411 s->stride[plane], s->block_coeff[b]); 00412 } 00413 break; 00414 00415 case VP56_MB_INTER_NOVEC_PF: 00416 case VP56_MB_INTER_NOVEC_GF: 00417 for (b=0; b<b_max; b++) { 00418 plane = vp56_b2p[b+ab]; 00419 off = s->block_offset[b]; 00420 s->dsp.put_pixels_tab[1][0](frame_current->data[plane] + off, 00421 frame_ref->data[plane] + off, 00422 s->stride[plane], 8); 00423 s->dsp.idct_add(frame_current->data[plane] + off, 00424 s->stride[plane], s->block_coeff[b]); 00425 } 00426 break; 00427 00428 case VP56_MB_INTER_DELTA_PF: 00429 case VP56_MB_INTER_V1_PF: 00430 case VP56_MB_INTER_V2_PF: 00431 case VP56_MB_INTER_DELTA_GF: 00432 case VP56_MB_INTER_4V: 00433 case VP56_MB_INTER_V1_GF: 00434 case VP56_MB_INTER_V2_GF: 00435 for (b=0; b<b_max; b++) { 00436 int x_off = b==1 || b==3 ? 8 : 0; 00437 int y_off = b==2 || b==3 ? 8 : 0; 00438 plane = vp56_b2p[b+ab]; 00439 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane], 00440 16*col+x_off, 16*row+y_off); 00441 s->dsp.idct_add(frame_current->data[plane] + s->block_offset[b], 00442 s->stride[plane], s->block_coeff[b]); 00443 } 00444 break; 00445 } 00446 } 00447 00448 static int vp56_size_changed(AVCodecContext *avctx) 00449 { 00450 VP56Context *s = avctx->priv_data; 00451 int stride = s->framep[VP56_FRAME_CURRENT]->linesize[0]; 00452 int i; 00453 00454 s->plane_width[0] = s->plane_width[3] = avctx->coded_width; 00455 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2; 00456 s->plane_height[0] = s->plane_height[3] = avctx->coded_height; 00457 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2; 00458 00459 for (i=0; i<4; i++) 00460 s->stride[i] = s->flip * s->framep[VP56_FRAME_CURRENT]->linesize[i]; 00461 00462 s->mb_width = (avctx->coded_width +15) / 16; 00463 s->mb_height = (avctx->coded_height+15) / 16; 00464 00465 if (s->mb_width > 1000 || s->mb_height > 1000) { 00466 av_log(avctx, AV_LOG_ERROR, "picture too big\n"); 00467 return -1; 00468 } 00469 00470 s->qscale_table = av_realloc(s->qscale_table, s->mb_width); 00471 s->above_blocks = av_realloc(s->above_blocks, 00472 (4*s->mb_width+6) * sizeof(*s->above_blocks)); 00473 s->macroblocks = av_realloc(s->macroblocks, 00474 s->mb_width*s->mb_height*sizeof(*s->macroblocks)); 00475 av_free(s->edge_emu_buffer_alloc); 00476 s->edge_emu_buffer_alloc = av_malloc(16*stride); 00477 s->edge_emu_buffer = s->edge_emu_buffer_alloc; 00478 if (s->flip < 0) 00479 s->edge_emu_buffer += 15 * stride; 00480 00481 return 0; 00482 } 00483 00484 int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size, 00485 AVPacket *avpkt) 00486 { 00487 const uint8_t *buf = avpkt->data; 00488 VP56Context *s = avctx->priv_data; 00489 AVFrame *const p = s->framep[VP56_FRAME_CURRENT]; 00490 int remaining_buf_size = avpkt->size; 00491 int is_alpha, av_uninit(alpha_offset); 00492 00493 if (s->has_alpha) { 00494 if (remaining_buf_size < 3) 00495 return -1; 00496 alpha_offset = bytestream_get_be24(&buf); 00497 remaining_buf_size -= 3; 00498 if (remaining_buf_size < alpha_offset) 00499 return -1; 00500 } 00501 00502 for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) { 00503 int mb_row, mb_col, mb_row_flip, mb_offset = 0; 00504 int block, y, uv, stride_y, stride_uv; 00505 int golden_frame = 0; 00506 int res; 00507 00508 s->modelp = &s->models[is_alpha]; 00509 00510 res = s->parse_header(s, buf, remaining_buf_size, &golden_frame); 00511 if (!res) 00512 return -1; 00513 00514 if (!is_alpha) { 00515 p->reference = 1; 00516 if (avctx->get_buffer(avctx, p) < 0) { 00517 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 00518 return -1; 00519 } 00520 00521 if (res == 2) 00522 if (vp56_size_changed(avctx)) { 00523 avctx->release_buffer(avctx, p); 00524 return -1; 00525 } 00526 } 00527 00528 if (p->key_frame) { 00529 p->pict_type = AV_PICTURE_TYPE_I; 00530 s->default_models_init(s); 00531 for (block=0; block<s->mb_height*s->mb_width; block++) 00532 s->macroblocks[block].type = VP56_MB_INTRA; 00533 } else { 00534 p->pict_type = AV_PICTURE_TYPE_P; 00535 vp56_parse_mb_type_models(s); 00536 s->parse_vector_models(s); 00537 s->mb_type = VP56_MB_INTER_NOVEC_PF; 00538 } 00539 00540 s->parse_coeff_models(s); 00541 00542 memset(s->prev_dc, 0, sizeof(s->prev_dc)); 00543 s->prev_dc[1][VP56_FRAME_CURRENT] = 128; 00544 s->prev_dc[2][VP56_FRAME_CURRENT] = 128; 00545 00546 for (block=0; block < 4*s->mb_width+6; block++) { 00547 s->above_blocks[block].ref_frame = VP56_FRAME_NONE; 00548 s->above_blocks[block].dc_coeff = 0; 00549 s->above_blocks[block].not_null_dc = 0; 00550 } 00551 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT; 00552 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT; 00553 00554 stride_y = p->linesize[0]; 00555 stride_uv = p->linesize[1]; 00556 00557 if (s->flip < 0) 00558 mb_offset = 7; 00559 00560 /* main macroblocks loop */ 00561 for (mb_row=0; mb_row<s->mb_height; mb_row++) { 00562 if (s->flip < 0) 00563 mb_row_flip = s->mb_height - mb_row - 1; 00564 else 00565 mb_row_flip = mb_row; 00566 00567 for (block=0; block<4; block++) { 00568 s->left_block[block].ref_frame = VP56_FRAME_NONE; 00569 s->left_block[block].dc_coeff = 0; 00570 s->left_block[block].not_null_dc = 0; 00571 } 00572 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx)); 00573 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last)); 00574 00575 s->above_block_idx[0] = 1; 00576 s->above_block_idx[1] = 2; 00577 s->above_block_idx[2] = 1; 00578 s->above_block_idx[3] = 2; 00579 s->above_block_idx[4] = 2*s->mb_width + 2 + 1; 00580 s->above_block_idx[5] = 3*s->mb_width + 4 + 1; 00581 00582 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y; 00583 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y; 00584 s->block_offset[1] = s->block_offset[0] + 8; 00585 s->block_offset[3] = s->block_offset[2] + 8; 00586 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv; 00587 s->block_offset[5] = s->block_offset[4]; 00588 00589 for (mb_col=0; mb_col<s->mb_width; mb_col++) { 00590 vp56_decode_mb(s, mb_row, mb_col, is_alpha); 00591 00592 for (y=0; y<4; y++) { 00593 s->above_block_idx[y] += 2; 00594 s->block_offset[y] += 16; 00595 } 00596 00597 for (uv=4; uv<6; uv++) { 00598 s->above_block_idx[uv] += 1; 00599 s->block_offset[uv] += 8; 00600 } 00601 } 00602 } 00603 00604 if (p->key_frame || golden_frame) { 00605 if (s->framep[VP56_FRAME_GOLDEN]->data[0] && 00606 s->framep[VP56_FRAME_GOLDEN] != s->framep[VP56_FRAME_GOLDEN2]) 00607 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]); 00608 s->framep[VP56_FRAME_GOLDEN] = p; 00609 } 00610 00611 if (s->has_alpha) { 00612 FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN], 00613 s->framep[VP56_FRAME_GOLDEN2]); 00614 buf += alpha_offset; 00615 remaining_buf_size -= alpha_offset; 00616 } 00617 } 00618 00619 if (s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN] || 00620 s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN2]) { 00621 if (s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN] && 00622 s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN2]) 00623 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS], 00624 s->framep[VP56_FRAME_UNUSED]); 00625 else 00626 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS], 00627 s->framep[VP56_FRAME_UNUSED2]); 00628 } else if (s->framep[VP56_FRAME_PREVIOUS]->data[0]) 00629 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]); 00630 FFSWAP(AVFrame *, s->framep[VP56_FRAME_CURRENT], 00631 s->framep[VP56_FRAME_PREVIOUS]); 00632 00633 p->qstride = 0; 00634 p->qscale_table = s->qscale_table; 00635 p->qscale_type = FF_QSCALE_TYPE_VP56; 00636 *(AVFrame*)data = *p; 00637 *data_size = sizeof(AVFrame); 00638 00639 return avpkt->size; 00640 } 00641 00642 av_cold void ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha) 00643 { 00644 VP56Context *s = avctx->priv_data; 00645 int i; 00646 00647 s->avctx = avctx; 00648 avctx->pix_fmt = has_alpha ? PIX_FMT_YUVA420P : PIX_FMT_YUV420P; 00649 00650 if (avctx->idct_algo == FF_IDCT_AUTO) 00651 avctx->idct_algo = FF_IDCT_VP3; 00652 dsputil_init(&s->dsp, avctx); 00653 ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id); 00654 ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct); 00655 00656 for (i=0; i<4; i++) 00657 s->framep[i] = &s->frames[i]; 00658 s->framep[VP56_FRAME_UNUSED] = s->framep[VP56_FRAME_GOLDEN]; 00659 s->framep[VP56_FRAME_UNUSED2] = s->framep[VP56_FRAME_GOLDEN2]; 00660 s->edge_emu_buffer_alloc = NULL; 00661 00662 s->above_blocks = NULL; 00663 s->macroblocks = NULL; 00664 s->quantizer = -1; 00665 s->deblock_filtering = 1; 00666 00667 s->filter = NULL; 00668 00669 s->has_alpha = has_alpha; 00670 if (flip) { 00671 s->flip = -1; 00672 s->frbi = 2; 00673 s->srbi = 0; 00674 } else { 00675 s->flip = 1; 00676 s->frbi = 0; 00677 s->srbi = 2; 00678 } 00679 } 00680 00681 av_cold int ff_vp56_free(AVCodecContext *avctx) 00682 { 00683 VP56Context *s = avctx->priv_data; 00684 00685 av_freep(&s->qscale_table); 00686 av_freep(&s->above_blocks); 00687 av_freep(&s->macroblocks); 00688 av_freep(&s->edge_emu_buffer_alloc); 00689 if (s->framep[VP56_FRAME_GOLDEN]->data[0]) 00690 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]); 00691 if (s->framep[VP56_FRAME_GOLDEN2]->data[0]) 00692 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN2]); 00693 if (s->framep[VP56_FRAME_PREVIOUS]->data[0]) 00694 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]); 00695 return 0; 00696 }