Libav
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00001 00028 #include <stdlib.h> 00029 00030 #include "avcodec.h" 00031 #include "dsputil.h" 00032 #include "get_bits.h" 00033 #include "huffman.h" 00034 00035 #include "vp56.h" 00036 #include "vp56data.h" 00037 #include "vp6data.h" 00038 00039 00040 static void vp6_parse_coeff(VP56Context *s); 00041 static void vp6_parse_coeff_huffman(VP56Context *s); 00042 00043 static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size, 00044 int *golden_frame) 00045 { 00046 VP56RangeCoder *c = &s->c; 00047 int parse_filter_info = 0; 00048 int coeff_offset = 0; 00049 int vrt_shift = 0; 00050 int sub_version; 00051 int rows, cols; 00052 int res = 1; 00053 int separated_coeff = buf[0] & 1; 00054 00055 s->framep[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80); 00056 vp56_init_dequant(s, (buf[0] >> 1) & 0x3F); 00057 00058 if (s->framep[VP56_FRAME_CURRENT]->key_frame) { 00059 sub_version = buf[1] >> 3; 00060 if (sub_version > 8) 00061 return 0; 00062 s->filter_header = buf[1] & 0x06; 00063 if (buf[1] & 1) { 00064 av_log(s->avctx, AV_LOG_ERROR, "interlacing not supported\n"); 00065 return 0; 00066 } 00067 if (separated_coeff || !s->filter_header) { 00068 coeff_offset = AV_RB16(buf+2) - 2; 00069 buf += 2; 00070 buf_size -= 2; 00071 } 00072 00073 rows = buf[2]; /* number of stored macroblock rows */ 00074 cols = buf[3]; /* number of stored macroblock cols */ 00075 /* buf[4] is number of displayed macroblock rows */ 00076 /* buf[5] is number of displayed macroblock cols */ 00077 00078 if (!s->macroblocks || /* first frame */ 00079 16*cols != s->avctx->coded_width || 00080 16*rows != s->avctx->coded_height) { 00081 avcodec_set_dimensions(s->avctx, 16*cols, 16*rows); 00082 if (s->avctx->extradata_size == 1) { 00083 s->avctx->width -= s->avctx->extradata[0] >> 4; 00084 s->avctx->height -= s->avctx->extradata[0] & 0x0F; 00085 } 00086 res = 2; 00087 } 00088 00089 vp56_init_range_decoder(c, buf+6, buf_size-6); 00090 vp56_rac_gets(c, 2); 00091 00092 parse_filter_info = s->filter_header; 00093 if (sub_version < 8) 00094 vrt_shift = 5; 00095 s->sub_version = sub_version; 00096 } else { 00097 if (!s->sub_version) 00098 return 0; 00099 00100 if (separated_coeff || !s->filter_header) { 00101 coeff_offset = AV_RB16(buf+1) - 2; 00102 buf += 2; 00103 buf_size -= 2; 00104 } 00105 vp56_init_range_decoder(c, buf+1, buf_size-1); 00106 00107 *golden_frame = vp56_rac_get(c); 00108 if (s->filter_header) { 00109 s->deblock_filtering = vp56_rac_get(c); 00110 if (s->deblock_filtering) 00111 vp56_rac_get(c); 00112 if (s->sub_version > 7) 00113 parse_filter_info = vp56_rac_get(c); 00114 } 00115 } 00116 00117 if (parse_filter_info) { 00118 if (vp56_rac_get(c)) { 00119 s->filter_mode = 2; 00120 s->sample_variance_threshold = vp56_rac_gets(c, 5) << vrt_shift; 00121 s->max_vector_length = 2 << vp56_rac_gets(c, 3); 00122 } else if (vp56_rac_get(c)) { 00123 s->filter_mode = 1; 00124 } else { 00125 s->filter_mode = 0; 00126 } 00127 if (s->sub_version > 7) 00128 s->filter_selection = vp56_rac_gets(c, 4); 00129 else 00130 s->filter_selection = 16; 00131 } 00132 00133 s->use_huffman = vp56_rac_get(c); 00134 00135 s->parse_coeff = vp6_parse_coeff; 00136 if (coeff_offset) { 00137 buf += coeff_offset; 00138 buf_size -= coeff_offset; 00139 if (buf_size < 0) 00140 return 0; 00141 if (s->use_huffman) { 00142 s->parse_coeff = vp6_parse_coeff_huffman; 00143 init_get_bits(&s->gb, buf, buf_size<<3); 00144 } else { 00145 vp56_init_range_decoder(&s->cc, buf, buf_size); 00146 s->ccp = &s->cc; 00147 } 00148 } else { 00149 s->ccp = &s->c; 00150 } 00151 00152 return res; 00153 } 00154 00155 static void vp6_coeff_order_table_init(VP56Context *s) 00156 { 00157 int i, pos, idx = 1; 00158 00159 s->modelp->coeff_index_to_pos[0] = 0; 00160 for (i=0; i<16; i++) 00161 for (pos=1; pos<64; pos++) 00162 if (s->modelp->coeff_reorder[pos] == i) 00163 s->modelp->coeff_index_to_pos[idx++] = pos; 00164 } 00165 00166 static void vp6_default_models_init(VP56Context *s) 00167 { 00168 VP56Model *model = s->modelp; 00169 00170 model->vector_dct[0] = 0xA2; 00171 model->vector_dct[1] = 0xA4; 00172 model->vector_sig[0] = 0x80; 00173 model->vector_sig[1] = 0x80; 00174 00175 memcpy(model->mb_types_stats, vp56_def_mb_types_stats, sizeof(model->mb_types_stats)); 00176 memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv)); 00177 memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv)); 00178 memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv)); 00179 memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder)); 00180 00181 vp6_coeff_order_table_init(s); 00182 } 00183 00184 static void vp6_parse_vector_models(VP56Context *s) 00185 { 00186 VP56RangeCoder *c = &s->c; 00187 VP56Model *model = s->modelp; 00188 int comp, node; 00189 00190 for (comp=0; comp<2; comp++) { 00191 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][0])) 00192 model->vector_dct[comp] = vp56_rac_gets_nn(c, 7); 00193 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][1])) 00194 model->vector_sig[comp] = vp56_rac_gets_nn(c, 7); 00195 } 00196 00197 for (comp=0; comp<2; comp++) 00198 for (node=0; node<7; node++) 00199 if (vp56_rac_get_prob(c, vp6_pdv_pct[comp][node])) 00200 model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7); 00201 00202 for (comp=0; comp<2; comp++) 00203 for (node=0; node<8; node++) 00204 if (vp56_rac_get_prob(c, vp6_fdv_pct[comp][node])) 00205 model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7); 00206 } 00207 00208 /* nodes must ascend by count, but with descending symbol order */ 00209 static int vp6_huff_cmp(const void *va, const void *vb) 00210 { 00211 const Node *a = va, *b = vb; 00212 return (a->count - b->count)*16 + (b->sym - a->sym); 00213 } 00214 00215 static void vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[], 00216 const uint8_t *map, unsigned size, VLC *vlc) 00217 { 00218 Node nodes[2*size], *tmp = &nodes[size]; 00219 int a, b, i; 00220 00221 /* first compute probabilities from model */ 00222 tmp[0].count = 256; 00223 for (i=0; i<size-1; i++) { 00224 a = tmp[i].count * coeff_model[i] >> 8; 00225 b = tmp[i].count * (255 - coeff_model[i]) >> 8; 00226 nodes[map[2*i ]].count = a + !a; 00227 nodes[map[2*i+1]].count = b + !b; 00228 } 00229 00230 free_vlc(vlc); 00231 /* then build the huffman tree accodring to probabilities */ 00232 ff_huff_build_tree(s->avctx, vlc, size, nodes, vp6_huff_cmp, 00233 FF_HUFFMAN_FLAG_HNODE_FIRST); 00234 } 00235 00236 static void vp6_parse_coeff_models(VP56Context *s) 00237 { 00238 VP56RangeCoder *c = &s->c; 00239 VP56Model *model = s->modelp; 00240 int def_prob[11]; 00241 int node, cg, ctx, pos; 00242 int ct; /* code type */ 00243 int pt; /* plane type (0 for Y, 1 for U or V) */ 00244 00245 memset(def_prob, 0x80, sizeof(def_prob)); 00246 00247 for (pt=0; pt<2; pt++) 00248 for (node=0; node<11; node++) 00249 if (vp56_rac_get_prob(c, vp6_dccv_pct[pt][node])) { 00250 def_prob[node] = vp56_rac_gets_nn(c, 7); 00251 model->coeff_dccv[pt][node] = def_prob[node]; 00252 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) { 00253 model->coeff_dccv[pt][node] = def_prob[node]; 00254 } 00255 00256 if (vp56_rac_get(c)) { 00257 for (pos=1; pos<64; pos++) 00258 if (vp56_rac_get_prob(c, vp6_coeff_reorder_pct[pos])) 00259 model->coeff_reorder[pos] = vp56_rac_gets(c, 4); 00260 vp6_coeff_order_table_init(s); 00261 } 00262 00263 for (cg=0; cg<2; cg++) 00264 for (node=0; node<14; node++) 00265 if (vp56_rac_get_prob(c, vp6_runv_pct[cg][node])) 00266 model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7); 00267 00268 for (ct=0; ct<3; ct++) 00269 for (pt=0; pt<2; pt++) 00270 for (cg=0; cg<6; cg++) 00271 for (node=0; node<11; node++) 00272 if (vp56_rac_get_prob(c, vp6_ract_pct[ct][pt][cg][node])) { 00273 def_prob[node] = vp56_rac_gets_nn(c, 7); 00274 model->coeff_ract[pt][ct][cg][node] = def_prob[node]; 00275 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) { 00276 model->coeff_ract[pt][ct][cg][node] = def_prob[node]; 00277 } 00278 00279 if (s->use_huffman) { 00280 for (pt=0; pt<2; pt++) { 00281 vp6_build_huff_tree(s, model->coeff_dccv[pt], 00282 vp6_huff_coeff_map, 12, &s->dccv_vlc[pt]); 00283 vp6_build_huff_tree(s, model->coeff_runv[pt], 00284 vp6_huff_run_map, 9, &s->runv_vlc[pt]); 00285 for (ct=0; ct<3; ct++) 00286 for (cg = 0; cg < 6; cg++) 00287 vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg], 00288 vp6_huff_coeff_map, 12, 00289 &s->ract_vlc[pt][ct][cg]); 00290 } 00291 memset(s->nb_null, 0, sizeof(s->nb_null)); 00292 } else { 00293 /* coeff_dcct is a linear combination of coeff_dccv */ 00294 for (pt=0; pt<2; pt++) 00295 for (ctx=0; ctx<3; ctx++) 00296 for (node=0; node<5; node++) 00297 model->coeff_dcct[pt][ctx][node] = av_clip(((model->coeff_dccv[pt][node] * vp6_dccv_lc[ctx][node][0] + 128) >> 8) + vp6_dccv_lc[ctx][node][1], 1, 255); 00298 } 00299 } 00300 00301 static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect) 00302 { 00303 VP56RangeCoder *c = &s->c; 00304 VP56Model *model = s->modelp; 00305 int comp; 00306 00307 *vect = (VP56mv) {0,0}; 00308 if (s->vector_candidate_pos < 2) 00309 *vect = s->vector_candidate[0]; 00310 00311 for (comp=0; comp<2; comp++) { 00312 int i, delta = 0; 00313 00314 if (vp56_rac_get_prob(c, model->vector_dct[comp])) { 00315 static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4}; 00316 for (i=0; i<sizeof(prob_order); i++) { 00317 int j = prob_order[i]; 00318 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])<<j; 00319 } 00320 if (delta & 0xF0) 00321 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3; 00322 else 00323 delta |= 8; 00324 } else { 00325 delta = vp56_rac_get_tree(c, vp56_pva_tree, 00326 model->vector_pdv[comp]); 00327 } 00328 00329 if (delta && vp56_rac_get_prob(c, model->vector_sig[comp])) 00330 delta = -delta; 00331 00332 if (!comp) 00333 vect->x += delta; 00334 else 00335 vect->y += delta; 00336 } 00337 } 00338 00343 static unsigned vp6_get_nb_null(VP56Context *s) 00344 { 00345 unsigned val = get_bits(&s->gb, 2); 00346 if (val == 2) 00347 val += get_bits(&s->gb, 2); 00348 else if (val == 3) { 00349 val = get_bits1(&s->gb) << 2; 00350 val = 6+val + get_bits(&s->gb, 2+val); 00351 } 00352 return val; 00353 } 00354 00355 static void vp6_parse_coeff_huffman(VP56Context *s) 00356 { 00357 VP56Model *model = s->modelp; 00358 uint8_t *permute = s->scantable.permutated; 00359 VLC *vlc_coeff; 00360 int coeff, sign, coeff_idx; 00361 int b, cg, idx; 00362 int pt = 0; /* plane type (0 for Y, 1 for U or V) */ 00363 00364 for (b=0; b<6; b++) { 00365 int ct = 0; /* code type */ 00366 if (b > 3) pt = 1; 00367 vlc_coeff = &s->dccv_vlc[pt]; 00368 00369 for (coeff_idx=0; coeff_idx<64; ) { 00370 int run = 1; 00371 if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) { 00372 s->nb_null[coeff_idx][pt]--; 00373 if (coeff_idx) 00374 break; 00375 } else { 00376 if (get_bits_count(&s->gb) >= s->gb.size_in_bits) 00377 return; 00378 coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3); 00379 if (coeff == 0) { 00380 if (coeff_idx) { 00381 int pt = (coeff_idx >= 6); 00382 run += get_vlc2(&s->gb, s->runv_vlc[pt].table, 9, 3); 00383 if (run >= 9) 00384 run += get_bits(&s->gb, 6); 00385 } else 00386 s->nb_null[0][pt] = vp6_get_nb_null(s); 00387 ct = 0; 00388 } else if (coeff == 11) { /* end of block */ 00389 if (coeff_idx == 1) /* first AC coeff ? */ 00390 s->nb_null[1][pt] = vp6_get_nb_null(s); 00391 break; 00392 } else { 00393 int coeff2 = vp56_coeff_bias[coeff]; 00394 if (coeff > 4) 00395 coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11); 00396 ct = 1 + (coeff2 > 1); 00397 sign = get_bits1(&s->gb); 00398 coeff2 = (coeff2 ^ -sign) + sign; 00399 if (coeff_idx) 00400 coeff2 *= s->dequant_ac; 00401 idx = model->coeff_index_to_pos[coeff_idx]; 00402 s->block_coeff[b][permute[idx]] = coeff2; 00403 } 00404 } 00405 coeff_idx+=run; 00406 cg = FFMIN(vp6_coeff_groups[coeff_idx], 3); 00407 vlc_coeff = &s->ract_vlc[pt][ct][cg]; 00408 } 00409 } 00410 } 00411 00412 static void vp6_parse_coeff(VP56Context *s) 00413 { 00414 VP56RangeCoder *c = s->ccp; 00415 VP56Model *model = s->modelp; 00416 uint8_t *permute = s->scantable.permutated; 00417 uint8_t *model1, *model2, *model3; 00418 int coeff, sign, coeff_idx; 00419 int b, i, cg, idx, ctx; 00420 int pt = 0; /* plane type (0 for Y, 1 for U or V) */ 00421 00422 for (b=0; b<6; b++) { 00423 int ct = 1; /* code type */ 00424 int run = 1; 00425 00426 if (b > 3) pt = 1; 00427 00428 ctx = s->left_block[vp56_b6to4[b]].not_null_dc 00429 + s->above_blocks[s->above_block_idx[b]].not_null_dc; 00430 model1 = model->coeff_dccv[pt]; 00431 model2 = model->coeff_dcct[pt][ctx]; 00432 00433 for (coeff_idx=0; coeff_idx<64; ) { 00434 if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) { 00435 /* parse a coeff */ 00436 if (vp56_rac_get_prob(c, model2[2])) { 00437 if (vp56_rac_get_prob(c, model2[3])) { 00438 idx = vp56_rac_get_tree(c, vp56_pc_tree, model1); 00439 coeff = vp56_coeff_bias[idx+5]; 00440 for (i=vp56_coeff_bit_length[idx]; i>=0; i--) 00441 coeff += vp56_rac_get_prob(c, vp56_coeff_parse_table[idx][i]) << i; 00442 } else { 00443 if (vp56_rac_get_prob(c, model2[4])) 00444 coeff = 3 + vp56_rac_get_prob(c, model1[5]); 00445 else 00446 coeff = 2; 00447 } 00448 ct = 2; 00449 } else { 00450 ct = 1; 00451 coeff = 1; 00452 } 00453 sign = vp56_rac_get(c); 00454 coeff = (coeff ^ -sign) + sign; 00455 if (coeff_idx) 00456 coeff *= s->dequant_ac; 00457 idx = model->coeff_index_to_pos[coeff_idx]; 00458 s->block_coeff[b][permute[idx]] = coeff; 00459 run = 1; 00460 } else { 00461 /* parse a run */ 00462 ct = 0; 00463 if (coeff_idx > 0) { 00464 if (!vp56_rac_get_prob(c, model2[1])) 00465 break; 00466 00467 model3 = model->coeff_runv[coeff_idx >= 6]; 00468 run = vp56_rac_get_tree(c, vp6_pcr_tree, model3); 00469 if (!run) 00470 for (run=9, i=0; i<6; i++) 00471 run += vp56_rac_get_prob(c, model3[i+8]) << i; 00472 } 00473 } 00474 00475 cg = vp6_coeff_groups[coeff_idx+=run]; 00476 model1 = model2 = model->coeff_ract[pt][ct][cg]; 00477 } 00478 00479 s->left_block[vp56_b6to4[b]].not_null_dc = 00480 s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0]; 00481 } 00482 } 00483 00484 static int vp6_block_variance(uint8_t *src, int stride) 00485 { 00486 int sum = 0, square_sum = 0; 00487 int y, x; 00488 00489 for (y=0; y<8; y+=2) { 00490 for (x=0; x<8; x+=2) { 00491 sum += src[x]; 00492 square_sum += src[x]*src[x]; 00493 } 00494 src += 2*stride; 00495 } 00496 return (16*square_sum - sum*sum) >> 8; 00497 } 00498 00499 static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride, 00500 int delta, const int16_t *weights) 00501 { 00502 int x, y; 00503 00504 for (y=0; y<8; y++) { 00505 for (x=0; x<8; x++) { 00506 dst[x] = av_clip_uint8(( src[x-delta ] * weights[0] 00507 + src[x ] * weights[1] 00508 + src[x+delta ] * weights[2] 00509 + src[x+2*delta] * weights[3] + 64) >> 7); 00510 } 00511 src += stride; 00512 dst += stride; 00513 } 00514 } 00515 00516 static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src, 00517 int stride, int h_weight, int v_weight) 00518 { 00519 uint8_t *tmp = s->edge_emu_buffer+16; 00520 s->dsp.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0); 00521 s->dsp.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight); 00522 } 00523 00524 static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src, 00525 int offset1, int offset2, int stride, 00526 VP56mv mv, int mask, int select, int luma) 00527 { 00528 int filter4 = 0; 00529 int x8 = mv.x & mask; 00530 int y8 = mv.y & mask; 00531 00532 if (luma) { 00533 x8 *= 2; 00534 y8 *= 2; 00535 filter4 = s->filter_mode; 00536 if (filter4 == 2) { 00537 if (s->max_vector_length && 00538 (FFABS(mv.x) > s->max_vector_length || 00539 FFABS(mv.y) > s->max_vector_length)) { 00540 filter4 = 0; 00541 } else if (s->sample_variance_threshold 00542 && (vp6_block_variance(src+offset1, stride) 00543 < s->sample_variance_threshold)) { 00544 filter4 = 0; 00545 } 00546 } 00547 } 00548 00549 if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) { 00550 offset1 = offset2; 00551 } 00552 00553 if (filter4) { 00554 if (!y8) { /* left or right combine */ 00555 vp6_filter_hv4(dst, src+offset1, stride, 1, 00556 vp6_block_copy_filter[select][x8]); 00557 } else if (!x8) { /* above or below combine */ 00558 vp6_filter_hv4(dst, src+offset1, stride, stride, 00559 vp6_block_copy_filter[select][y8]); 00560 } else { 00561 s->dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride, 00562 vp6_block_copy_filter[select][x8], 00563 vp6_block_copy_filter[select][y8]); 00564 } 00565 } else { 00566 if (!x8 || !y8) { 00567 s->dsp.put_h264_chroma_pixels_tab[0](dst, src+offset1, stride, 8, x8, y8); 00568 } else { 00569 vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8); 00570 } 00571 } 00572 } 00573 00574 static av_cold int vp6_decode_init(AVCodecContext *avctx) 00575 { 00576 VP56Context *s = avctx->priv_data; 00577 00578 vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6, 00579 avctx->codec->id == CODEC_ID_VP6A); 00580 s->vp56_coord_div = vp6_coord_div; 00581 s->parse_vector_adjustment = vp6_parse_vector_adjustment; 00582 s->filter = vp6_filter; 00583 s->default_models_init = vp6_default_models_init; 00584 s->parse_vector_models = vp6_parse_vector_models; 00585 s->parse_coeff_models = vp6_parse_coeff_models; 00586 s->parse_header = vp6_parse_header; 00587 00588 return 0; 00589 } 00590 00591 static av_cold int vp6_decode_free(AVCodecContext *avctx) 00592 { 00593 VP56Context *s = avctx->priv_data; 00594 int pt, ct, cg; 00595 00596 vp56_free(avctx); 00597 00598 for (pt=0; pt<2; pt++) { 00599 free_vlc(&s->dccv_vlc[pt]); 00600 free_vlc(&s->runv_vlc[pt]); 00601 for (ct=0; ct<3; ct++) 00602 for (cg=0; cg<6; cg++) 00603 free_vlc(&s->ract_vlc[pt][ct][cg]); 00604 } 00605 return 0; 00606 } 00607 00608 AVCodec vp6_decoder = { 00609 "vp6", 00610 AVMEDIA_TYPE_VIDEO, 00611 CODEC_ID_VP6, 00612 sizeof(VP56Context), 00613 vp6_decode_init, 00614 NULL, 00615 vp6_decode_free, 00616 vp56_decode_frame, 00617 CODEC_CAP_DR1, 00618 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"), 00619 }; 00620 00621 /* flash version, not flipped upside-down */ 00622 AVCodec vp6f_decoder = { 00623 "vp6f", 00624 AVMEDIA_TYPE_VIDEO, 00625 CODEC_ID_VP6F, 00626 sizeof(VP56Context), 00627 vp6_decode_init, 00628 NULL, 00629 vp6_decode_free, 00630 vp56_decode_frame, 00631 CODEC_CAP_DR1, 00632 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"), 00633 }; 00634 00635 /* flash version, not flipped upside-down, with alpha channel */ 00636 AVCodec vp6a_decoder = { 00637 "vp6a", 00638 AVMEDIA_TYPE_VIDEO, 00639 CODEC_ID_VP6A, 00640 sizeof(VP56Context), 00641 vp6_decode_init, 00642 NULL, 00643 vp6_decode_free, 00644 vp56_decode_frame, 00645 CODEC_CAP_DR1, 00646 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"), 00647 };