00001
00024 #include "avcodec.h"
00025 #include "bytestream.h"
00026
00027 #include "vp56.h"
00028 #include "vp56data.h"
00029
00030
00031 void 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
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
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;
00121
00122
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
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
00167 for (b=0; b<4; b++) {
00168 type[b] = vp56_rac_gets(&s->c, 2);
00169 if (type[b])
00170 type[b]++;
00171 }
00172
00173
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
00194 s->macroblocks[row * s->mb_width + col].mv = s->mv[3];
00195
00196
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
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_edge_filter(VP56Context *s, uint8_t *yuv,
00304 int pix_inc, int line_inc, int t)
00305 {
00306 int pix2_inc = 2 * pix_inc;
00307 int i, v;
00308
00309 for (i=0; i<12; i++) {
00310 v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4) >>3;
00311 v = s->adjust(v, t);
00312 yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v);
00313 yuv[0] = av_clip_uint8(yuv[0] - v);
00314 yuv += line_inc;
00315 }
00316 }
00317
00318 static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv,
00319 int stride, int dx, int dy)
00320 {
00321 int t = vp56_filter_threshold[s->quantizer];
00322 if (dx) vp56_edge_filter(s, yuv + 10-dx , 1, stride, t);
00323 if (dy) vp56_edge_filter(s, yuv + stride*(10-dy), stride, 1, t);
00324 }
00325
00326 static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src,
00327 int stride, int x, int y)
00328 {
00329 uint8_t *dst=s->framep[VP56_FRAME_CURRENT]->data[plane]+s->block_offset[b];
00330 uint8_t *src_block;
00331 int src_offset;
00332 int overlap_offset = 0;
00333 int mask = s->vp56_coord_div[b] - 1;
00334 int deblock_filtering = s->deblock_filtering;
00335 int dx;
00336 int dy;
00337
00338 if (s->avctx->skip_loop_filter >= AVDISCARD_ALL ||
00339 (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY
00340 && !s->framep[VP56_FRAME_CURRENT]->key_frame))
00341 deblock_filtering = 0;
00342
00343 dx = s->mv[b].x / s->vp56_coord_div[b];
00344 dy = s->mv[b].y / s->vp56_coord_div[b];
00345
00346 if (b >= 4) {
00347 x /= 2;
00348 y /= 2;
00349 }
00350 x += dx - 2;
00351 y += dy - 2;
00352
00353 if (x<0 || x+12>=s->plane_width[plane] ||
00354 y<0 || y+12>=s->plane_height[plane]) {
00355 ff_emulated_edge_mc(s->edge_emu_buffer,
00356 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
00357 stride, 12, 12, x, y,
00358 s->plane_width[plane],
00359 s->plane_height[plane]);
00360 src_block = s->edge_emu_buffer;
00361 src_offset = 2 + 2*stride;
00362 } else if (deblock_filtering) {
00363
00364
00365 s->dsp.put_pixels_tab[0][0](s->edge_emu_buffer,
00366 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
00367 stride, 12);
00368 src_block = s->edge_emu_buffer;
00369 src_offset = 2 + 2*stride;
00370 } else {
00371 src_block = src;
00372 src_offset = s->block_offset[b] + dy*stride + dx;
00373 }
00374
00375 if (deblock_filtering)
00376 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7);
00377
00378 if (s->mv[b].x & mask)
00379 overlap_offset += (s->mv[b].x > 0) ? 1 : -1;
00380 if (s->mv[b].y & mask)
00381 overlap_offset += (s->mv[b].y > 0) ? stride : -stride;
00382
00383 if (overlap_offset) {
00384 if (s->filter)
00385 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset,
00386 stride, s->mv[b], mask, s->filter_selection, b<4);
00387 else
00388 s->dsp.put_no_rnd_pixels_l2[1](dst, src_block+src_offset,
00389 src_block+src_offset+overlap_offset,
00390 stride, 8);
00391 } else {
00392 s->dsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8);
00393 }
00394 }
00395
00396 static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
00397 {
00398 AVFrame *frame_current, *frame_ref;
00399 VP56mb mb_type;
00400 VP56Frame ref_frame;
00401 int b, ab, b_max, plane, off;
00402
00403 if (s->framep[VP56_FRAME_CURRENT]->key_frame)
00404 mb_type = VP56_MB_INTRA;
00405 else
00406 mb_type = vp56_decode_mv(s, row, col);
00407 ref_frame = vp56_reference_frame[mb_type];
00408
00409 s->dsp.clear_blocks(*s->block_coeff);
00410
00411 s->parse_coeff(s);
00412
00413 vp56_add_predictors_dc(s, ref_frame);
00414
00415 frame_current = s->framep[VP56_FRAME_CURRENT];
00416 frame_ref = s->framep[ref_frame];
00417
00418 ab = 6*is_alpha;
00419 b_max = 6 - 2*is_alpha;
00420
00421 switch (mb_type) {
00422 case VP56_MB_INTRA:
00423 for (b=0; b<b_max; b++) {
00424 plane = vp56_b2p[b+ab];
00425 s->dsp.idct_put(frame_current->data[plane] + s->block_offset[b],
00426 s->stride[plane], s->block_coeff[b]);
00427 }
00428 break;
00429
00430 case VP56_MB_INTER_NOVEC_PF:
00431 case VP56_MB_INTER_NOVEC_GF:
00432 for (b=0; b<b_max; b++) {
00433 plane = vp56_b2p[b+ab];
00434 off = s->block_offset[b];
00435 s->dsp.put_pixels_tab[1][0](frame_current->data[plane] + off,
00436 frame_ref->data[plane] + off,
00437 s->stride[plane], 8);
00438 s->dsp.idct_add(frame_current->data[plane] + off,
00439 s->stride[plane], s->block_coeff[b]);
00440 }
00441 break;
00442
00443 case VP56_MB_INTER_DELTA_PF:
00444 case VP56_MB_INTER_V1_PF:
00445 case VP56_MB_INTER_V2_PF:
00446 case VP56_MB_INTER_DELTA_GF:
00447 case VP56_MB_INTER_4V:
00448 case VP56_MB_INTER_V1_GF:
00449 case VP56_MB_INTER_V2_GF:
00450 for (b=0; b<b_max; b++) {
00451 int x_off = b==1 || b==3 ? 8 : 0;
00452 int y_off = b==2 || b==3 ? 8 : 0;
00453 plane = vp56_b2p[b+ab];
00454 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane],
00455 16*col+x_off, 16*row+y_off);
00456 s->dsp.idct_add(frame_current->data[plane] + s->block_offset[b],
00457 s->stride[plane], s->block_coeff[b]);
00458 }
00459 break;
00460 }
00461 }
00462
00463 static int vp56_size_changed(AVCodecContext *avctx)
00464 {
00465 VP56Context *s = avctx->priv_data;
00466 int stride = s->framep[VP56_FRAME_CURRENT]->linesize[0];
00467 int i;
00468
00469 s->plane_width[0] = s->plane_width[3] = avctx->coded_width;
00470 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2;
00471 s->plane_height[0] = s->plane_height[3] = avctx->coded_height;
00472 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2;
00473
00474 for (i=0; i<4; i++)
00475 s->stride[i] = s->flip * s->framep[VP56_FRAME_CURRENT]->linesize[i];
00476
00477 s->mb_width = (avctx->coded_width +15) / 16;
00478 s->mb_height = (avctx->coded_height+15) / 16;
00479
00480 if (s->mb_width > 1000 || s->mb_height > 1000) {
00481 av_log(avctx, AV_LOG_ERROR, "picture too big\n");
00482 return -1;
00483 }
00484
00485 s->qscale_table = av_realloc(s->qscale_table, s->mb_width);
00486 s->above_blocks = av_realloc(s->above_blocks,
00487 (4*s->mb_width+6) * sizeof(*s->above_blocks));
00488 s->macroblocks = av_realloc(s->macroblocks,
00489 s->mb_width*s->mb_height*sizeof(*s->macroblocks));
00490 av_free(s->edge_emu_buffer_alloc);
00491 s->edge_emu_buffer_alloc = av_malloc(16*stride);
00492 s->edge_emu_buffer = s->edge_emu_buffer_alloc;
00493 if (s->flip < 0)
00494 s->edge_emu_buffer += 15 * stride;
00495
00496 return 0;
00497 }
00498
00499 int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
00500 AVPacket *avpkt)
00501 {
00502 const uint8_t *buf = avpkt->data;
00503 VP56Context *s = avctx->priv_data;
00504 AVFrame *const p = s->framep[VP56_FRAME_CURRENT];
00505 int remaining_buf_size = avpkt->size;
00506 int is_alpha, av_uninit(alpha_offset);
00507
00508 if (s->has_alpha) {
00509 if (remaining_buf_size < 3)
00510 return -1;
00511 alpha_offset = bytestream_get_be24(&buf);
00512 remaining_buf_size -= 3;
00513 if (remaining_buf_size < alpha_offset)
00514 return -1;
00515 }
00516
00517 for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) {
00518 int mb_row, mb_col, mb_row_flip, mb_offset = 0;
00519 int block, y, uv, stride_y, stride_uv;
00520 int golden_frame = 0;
00521 int res;
00522
00523 s->modelp = &s->models[is_alpha];
00524
00525 res = s->parse_header(s, buf, remaining_buf_size, &golden_frame);
00526 if (!res)
00527 return -1;
00528
00529 if (!is_alpha) {
00530 p->reference = 1;
00531 if (avctx->get_buffer(avctx, p) < 0) {
00532 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00533 return -1;
00534 }
00535
00536 if (res == 2)
00537 if (vp56_size_changed(avctx)) {
00538 avctx->release_buffer(avctx, p);
00539 return -1;
00540 }
00541 }
00542
00543 if (p->key_frame) {
00544 p->pict_type = FF_I_TYPE;
00545 s->default_models_init(s);
00546 for (block=0; block<s->mb_height*s->mb_width; block++)
00547 s->macroblocks[block].type = VP56_MB_INTRA;
00548 } else {
00549 p->pict_type = FF_P_TYPE;
00550 vp56_parse_mb_type_models(s);
00551 s->parse_vector_models(s);
00552 s->mb_type = VP56_MB_INTER_NOVEC_PF;
00553 }
00554
00555 s->parse_coeff_models(s);
00556
00557 memset(s->prev_dc, 0, sizeof(s->prev_dc));
00558 s->prev_dc[1][VP56_FRAME_CURRENT] = 128;
00559 s->prev_dc[2][VP56_FRAME_CURRENT] = 128;
00560
00561 for (block=0; block < 4*s->mb_width+6; block++) {
00562 s->above_blocks[block].ref_frame = VP56_FRAME_NONE;
00563 s->above_blocks[block].dc_coeff = 0;
00564 s->above_blocks[block].not_null_dc = 0;
00565 }
00566 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT;
00567 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT;
00568
00569 stride_y = p->linesize[0];
00570 stride_uv = p->linesize[1];
00571
00572 if (s->flip < 0)
00573 mb_offset = 7;
00574
00575
00576 for (mb_row=0; mb_row<s->mb_height; mb_row++) {
00577 if (s->flip < 0)
00578 mb_row_flip = s->mb_height - mb_row - 1;
00579 else
00580 mb_row_flip = mb_row;
00581
00582 for (block=0; block<4; block++) {
00583 s->left_block[block].ref_frame = VP56_FRAME_NONE;
00584 s->left_block[block].dc_coeff = 0;
00585 s->left_block[block].not_null_dc = 0;
00586 }
00587 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx));
00588 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last));
00589
00590 s->above_block_idx[0] = 1;
00591 s->above_block_idx[1] = 2;
00592 s->above_block_idx[2] = 1;
00593 s->above_block_idx[3] = 2;
00594 s->above_block_idx[4] = 2*s->mb_width + 2 + 1;
00595 s->above_block_idx[5] = 3*s->mb_width + 4 + 1;
00596
00597 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y;
00598 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y;
00599 s->block_offset[1] = s->block_offset[0] + 8;
00600 s->block_offset[3] = s->block_offset[2] + 8;
00601 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv;
00602 s->block_offset[5] = s->block_offset[4];
00603
00604 for (mb_col=0; mb_col<s->mb_width; mb_col++) {
00605 vp56_decode_mb(s, mb_row, mb_col, is_alpha);
00606
00607 for (y=0; y<4; y++) {
00608 s->above_block_idx[y] += 2;
00609 s->block_offset[y] += 16;
00610 }
00611
00612 for (uv=4; uv<6; uv++) {
00613 s->above_block_idx[uv] += 1;
00614 s->block_offset[uv] += 8;
00615 }
00616 }
00617 }
00618
00619 if (p->key_frame || golden_frame) {
00620 if (s->framep[VP56_FRAME_GOLDEN]->data[0] &&
00621 s->framep[VP56_FRAME_GOLDEN] != s->framep[VP56_FRAME_GOLDEN2])
00622 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
00623 s->framep[VP56_FRAME_GOLDEN] = p;
00624 }
00625
00626 if (s->has_alpha) {
00627 FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN],
00628 s->framep[VP56_FRAME_GOLDEN2]);
00629 buf += alpha_offset;
00630 remaining_buf_size -= alpha_offset;
00631 }
00632 }
00633
00634 if (s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN] ||
00635 s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN2]) {
00636 if (s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN] &&
00637 s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN2])
00638 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
00639 s->framep[VP56_FRAME_UNUSED]);
00640 else
00641 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
00642 s->framep[VP56_FRAME_UNUSED2]);
00643 } else if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
00644 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
00645 FFSWAP(AVFrame *, s->framep[VP56_FRAME_CURRENT],
00646 s->framep[VP56_FRAME_PREVIOUS]);
00647
00648 p->qstride = 0;
00649 p->qscale_table = s->qscale_table;
00650 p->qscale_type = FF_QSCALE_TYPE_VP56;
00651 *(AVFrame*)data = *p;
00652 *data_size = sizeof(AVFrame);
00653
00654 return avpkt->size;
00655 }
00656
00657 av_cold void vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
00658 {
00659 VP56Context *s = avctx->priv_data;
00660 int i;
00661
00662 s->avctx = avctx;
00663 avctx->pix_fmt = has_alpha ? PIX_FMT_YUVA420P : PIX_FMT_YUV420P;
00664
00665 if (avctx->idct_algo == FF_IDCT_AUTO)
00666 avctx->idct_algo = FF_IDCT_VP3;
00667 dsputil_init(&s->dsp, avctx);
00668 ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct);
00669
00670 for (i=0; i<4; i++)
00671 s->framep[i] = &s->frames[i];
00672 s->framep[VP56_FRAME_UNUSED] = s->framep[VP56_FRAME_GOLDEN];
00673 s->framep[VP56_FRAME_UNUSED2] = s->framep[VP56_FRAME_GOLDEN2];
00674 s->edge_emu_buffer_alloc = NULL;
00675
00676 s->above_blocks = NULL;
00677 s->macroblocks = NULL;
00678 s->quantizer = -1;
00679 s->deblock_filtering = 1;
00680
00681 s->filter = NULL;
00682
00683 s->has_alpha = has_alpha;
00684 if (flip) {
00685 s->flip = -1;
00686 s->frbi = 2;
00687 s->srbi = 0;
00688 } else {
00689 s->flip = 1;
00690 s->frbi = 0;
00691 s->srbi = 2;
00692 }
00693 }
00694
00695 av_cold int vp56_free(AVCodecContext *avctx)
00696 {
00697 VP56Context *s = avctx->priv_data;
00698
00699 av_freep(&s->qscale_table);
00700 av_freep(&s->above_blocks);
00701 av_freep(&s->macroblocks);
00702 av_freep(&s->edge_emu_buffer_alloc);
00703 if (s->framep[VP56_FRAME_GOLDEN]->data[0])
00704 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
00705 if (s->framep[VP56_FRAME_GOLDEN2]->data[0])
00706 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN2]);
00707 if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
00708 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
00709 return 0;
00710 }