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 #define VP6_MAX_HUFF_SIZE 12
00040
00041 static void vp6_parse_coeff(VP56Context *s);
00042 static void vp6_parse_coeff_huffman(VP56Context *s);
00043
00044 static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
00045 int *golden_frame)
00046 {
00047 VP56RangeCoder *c = &s->c;
00048 int parse_filter_info = 0;
00049 int coeff_offset = 0;
00050 int vrt_shift = 0;
00051 int sub_version;
00052 int rows, cols;
00053 int res = 1;
00054 int separated_coeff = buf[0] & 1;
00055
00056 s->framep[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80);
00057 ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F);
00058
00059 if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
00060 sub_version = buf[1] >> 3;
00061 if (sub_version > 8)
00062 return 0;
00063 s->filter_header = buf[1] & 0x06;
00064 if (buf[1] & 1) {
00065 av_log(s->avctx, AV_LOG_ERROR, "interlacing not supported\n");
00066 return 0;
00067 }
00068 if (separated_coeff || !s->filter_header) {
00069 coeff_offset = AV_RB16(buf+2) - 2;
00070 buf += 2;
00071 buf_size -= 2;
00072 }
00073
00074 rows = buf[2];
00075 cols = buf[3];
00076
00077
00078
00079 if (!s->macroblocks ||
00080 16*cols != s->avctx->coded_width ||
00081 16*rows != s->avctx->coded_height) {
00082 avcodec_set_dimensions(s->avctx, 16*cols, 16*rows);
00083 if (s->avctx->extradata_size == 1) {
00084 s->avctx->width -= s->avctx->extradata[0] >> 4;
00085 s->avctx->height -= s->avctx->extradata[0] & 0x0F;
00086 }
00087 res = 2;
00088 }
00089
00090 ff_vp56_init_range_decoder(c, buf+6, buf_size-6);
00091 vp56_rac_gets(c, 2);
00092
00093 parse_filter_info = s->filter_header;
00094 if (sub_version < 8)
00095 vrt_shift = 5;
00096 s->sub_version = sub_version;
00097 } else {
00098 if (!s->sub_version)
00099 return 0;
00100
00101 if (separated_coeff || !s->filter_header) {
00102 coeff_offset = AV_RB16(buf+1) - 2;
00103 buf += 2;
00104 buf_size -= 2;
00105 }
00106 ff_vp56_init_range_decoder(c, buf+1, buf_size-1);
00107
00108 *golden_frame = vp56_rac_get(c);
00109 if (s->filter_header) {
00110 s->deblock_filtering = vp56_rac_get(c);
00111 if (s->deblock_filtering)
00112 vp56_rac_get(c);
00113 if (s->sub_version > 7)
00114 parse_filter_info = vp56_rac_get(c);
00115 }
00116 }
00117
00118 if (parse_filter_info) {
00119 if (vp56_rac_get(c)) {
00120 s->filter_mode = 2;
00121 s->sample_variance_threshold = vp56_rac_gets(c, 5) << vrt_shift;
00122 s->max_vector_length = 2 << vp56_rac_gets(c, 3);
00123 } else if (vp56_rac_get(c)) {
00124 s->filter_mode = 1;
00125 } else {
00126 s->filter_mode = 0;
00127 }
00128 if (s->sub_version > 7)
00129 s->filter_selection = vp56_rac_gets(c, 4);
00130 else
00131 s->filter_selection = 16;
00132 }
00133
00134 s->use_huffman = vp56_rac_get(c);
00135
00136 s->parse_coeff = vp6_parse_coeff;
00137 if (coeff_offset) {
00138 buf += coeff_offset;
00139 buf_size -= coeff_offset;
00140 if (buf_size < 0)
00141 return 0;
00142 if (s->use_huffman) {
00143 s->parse_coeff = vp6_parse_coeff_huffman;
00144 init_get_bits(&s->gb, buf, buf_size<<3);
00145 } else {
00146 ff_vp56_init_range_decoder(&s->cc, buf, buf_size);
00147 s->ccp = &s->cc;
00148 }
00149 } else {
00150 s->ccp = &s->c;
00151 }
00152
00153 return res;
00154 }
00155
00156 static void vp6_coeff_order_table_init(VP56Context *s)
00157 {
00158 int i, pos, idx = 1;
00159
00160 s->modelp->coeff_index_to_pos[0] = 0;
00161 for (i=0; i<16; i++)
00162 for (pos=1; pos<64; pos++)
00163 if (s->modelp->coeff_reorder[pos] == i)
00164 s->modelp->coeff_index_to_pos[idx++] = pos;
00165 }
00166
00167 static void vp6_default_models_init(VP56Context *s)
00168 {
00169 VP56Model *model = s->modelp;
00170
00171 model->vector_dct[0] = 0xA2;
00172 model->vector_dct[1] = 0xA4;
00173 model->vector_sig[0] = 0x80;
00174 model->vector_sig[1] = 0x80;
00175
00176 memcpy(model->mb_types_stats, vp56_def_mb_types_stats, sizeof(model->mb_types_stats));
00177 memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv));
00178 memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv));
00179 memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv));
00180 memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder));
00181
00182 vp6_coeff_order_table_init(s);
00183 }
00184
00185 static void vp6_parse_vector_models(VP56Context *s)
00186 {
00187 VP56RangeCoder *c = &s->c;
00188 VP56Model *model = s->modelp;
00189 int comp, node;
00190
00191 for (comp=0; comp<2; comp++) {
00192 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][0]))
00193 model->vector_dct[comp] = vp56_rac_gets_nn(c, 7);
00194 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][1]))
00195 model->vector_sig[comp] = vp56_rac_gets_nn(c, 7);
00196 }
00197
00198 for (comp=0; comp<2; comp++)
00199 for (node=0; node<7; node++)
00200 if (vp56_rac_get_prob(c, vp6_pdv_pct[comp][node]))
00201 model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7);
00202
00203 for (comp=0; comp<2; comp++)
00204 for (node=0; node<8; node++)
00205 if (vp56_rac_get_prob(c, vp6_fdv_pct[comp][node]))
00206 model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7);
00207 }
00208
00209
00210 static int vp6_huff_cmp(const void *va, const void *vb)
00211 {
00212 const Node *a = va, *b = vb;
00213 return (a->count - b->count)*16 + (b->sym - a->sym);
00214 }
00215
00216 static void vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[],
00217 const uint8_t *map, unsigned size, VLC *vlc)
00218 {
00219 Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size];
00220 int a, b, i;
00221
00222
00223 tmp[0].count = 256;
00224 for (i=0; i<size-1; i++) {
00225 a = tmp[i].count * coeff_model[i] >> 8;
00226 b = tmp[i].count * (255 - coeff_model[i]) >> 8;
00227 nodes[map[2*i ]].count = a + !a;
00228 nodes[map[2*i+1]].count = b + !b;
00229 }
00230
00231 free_vlc(vlc);
00232
00233 ff_huff_build_tree(s->avctx, vlc, size, nodes, vp6_huff_cmp,
00234 FF_HUFFMAN_FLAG_HNODE_FIRST);
00235 }
00236
00237 static void vp6_parse_coeff_models(VP56Context *s)
00238 {
00239 VP56RangeCoder *c = &s->c;
00240 VP56Model *model = s->modelp;
00241 int def_prob[11];
00242 int node, cg, ctx, pos;
00243 int ct;
00244 int pt;
00245
00246 memset(def_prob, 0x80, sizeof(def_prob));
00247
00248 for (pt=0; pt<2; pt++)
00249 for (node=0; node<11; node++)
00250 if (vp56_rac_get_prob(c, vp6_dccv_pct[pt][node])) {
00251 def_prob[node] = vp56_rac_gets_nn(c, 7);
00252 model->coeff_dccv[pt][node] = def_prob[node];
00253 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
00254 model->coeff_dccv[pt][node] = def_prob[node];
00255 }
00256
00257 if (vp56_rac_get(c)) {
00258 for (pos=1; pos<64; pos++)
00259 if (vp56_rac_get_prob(c, vp6_coeff_reorder_pct[pos]))
00260 model->coeff_reorder[pos] = vp56_rac_gets(c, 4);
00261 vp6_coeff_order_table_init(s);
00262 }
00263
00264 for (cg=0; cg<2; cg++)
00265 for (node=0; node<14; node++)
00266 if (vp56_rac_get_prob(c, vp6_runv_pct[cg][node]))
00267 model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7);
00268
00269 for (ct=0; ct<3; ct++)
00270 for (pt=0; pt<2; pt++)
00271 for (cg=0; cg<6; cg++)
00272 for (node=0; node<11; node++)
00273 if (vp56_rac_get_prob(c, vp6_ract_pct[ct][pt][cg][node])) {
00274 def_prob[node] = vp56_rac_gets_nn(c, 7);
00275 model->coeff_ract[pt][ct][cg][node] = def_prob[node];
00276 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
00277 model->coeff_ract[pt][ct][cg][node] = def_prob[node];
00278 }
00279
00280 if (s->use_huffman) {
00281 for (pt=0; pt<2; pt++) {
00282 vp6_build_huff_tree(s, model->coeff_dccv[pt],
00283 vp6_huff_coeff_map, 12, &s->dccv_vlc[pt]);
00284 vp6_build_huff_tree(s, model->coeff_runv[pt],
00285 vp6_huff_run_map, 9, &s->runv_vlc[pt]);
00286 for (ct=0; ct<3; ct++)
00287 for (cg = 0; cg < 6; cg++)
00288 vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg],
00289 vp6_huff_coeff_map, 12,
00290 &s->ract_vlc[pt][ct][cg]);
00291 }
00292 memset(s->nb_null, 0, sizeof(s->nb_null));
00293 } else {
00294
00295 for (pt=0; pt<2; pt++)
00296 for (ctx=0; ctx<3; ctx++)
00297 for (node=0; node<5; node++)
00298 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);
00299 }
00300 }
00301
00302 static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
00303 {
00304 VP56RangeCoder *c = &s->c;
00305 VP56Model *model = s->modelp;
00306 int comp;
00307
00308 *vect = (VP56mv) {0,0};
00309 if (s->vector_candidate_pos < 2)
00310 *vect = s->vector_candidate[0];
00311
00312 for (comp=0; comp<2; comp++) {
00313 int i, delta = 0;
00314
00315 if (vp56_rac_get_prob(c, model->vector_dct[comp])) {
00316 static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4};
00317 for (i=0; i<sizeof(prob_order); i++) {
00318 int j = prob_order[i];
00319 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])<<j;
00320 }
00321 if (delta & 0xF0)
00322 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3;
00323 else
00324 delta |= 8;
00325 } else {
00326 delta = vp56_rac_get_tree(c, vp56_pva_tree,
00327 model->vector_pdv[comp]);
00328 }
00329
00330 if (delta && vp56_rac_get_prob(c, model->vector_sig[comp]))
00331 delta = -delta;
00332
00333 if (!comp)
00334 vect->x += delta;
00335 else
00336 vect->y += delta;
00337 }
00338 }
00339
00344 static unsigned vp6_get_nb_null(VP56Context *s)
00345 {
00346 unsigned val = get_bits(&s->gb, 2);
00347 if (val == 2)
00348 val += get_bits(&s->gb, 2);
00349 else if (val == 3) {
00350 val = get_bits1(&s->gb) << 2;
00351 val = 6+val + get_bits(&s->gb, 2+val);
00352 }
00353 return val;
00354 }
00355
00356 static void vp6_parse_coeff_huffman(VP56Context *s)
00357 {
00358 VP56Model *model = s->modelp;
00359 uint8_t *permute = s->scantable.permutated;
00360 VLC *vlc_coeff;
00361 int coeff, sign, coeff_idx;
00362 int b, cg, idx;
00363 int pt = 0;
00364
00365 for (b=0; b<6; b++) {
00366 int ct = 0;
00367 if (b > 3) pt = 1;
00368 vlc_coeff = &s->dccv_vlc[pt];
00369
00370 for (coeff_idx=0; coeff_idx<64; ) {
00371 int run = 1;
00372 if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) {
00373 s->nb_null[coeff_idx][pt]--;
00374 if (coeff_idx)
00375 break;
00376 } else {
00377 if (get_bits_count(&s->gb) >= s->gb.size_in_bits)
00378 return;
00379 coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3);
00380 if (coeff == 0) {
00381 if (coeff_idx) {
00382 int pt = (coeff_idx >= 6);
00383 run += get_vlc2(&s->gb, s->runv_vlc[pt].table, 9, 3);
00384 if (run >= 9)
00385 run += get_bits(&s->gb, 6);
00386 } else
00387 s->nb_null[0][pt] = vp6_get_nb_null(s);
00388 ct = 0;
00389 } else if (coeff == 11) {
00390 if (coeff_idx == 1)
00391 s->nb_null[1][pt] = vp6_get_nb_null(s);
00392 break;
00393 } else {
00394 int coeff2 = vp56_coeff_bias[coeff];
00395 if (coeff > 4)
00396 coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11);
00397 ct = 1 + (coeff2 > 1);
00398 sign = get_bits1(&s->gb);
00399 coeff2 = (coeff2 ^ -sign) + sign;
00400 if (coeff_idx)
00401 coeff2 *= s->dequant_ac;
00402 idx = model->coeff_index_to_pos[coeff_idx];
00403 s->block_coeff[b][permute[idx]] = coeff2;
00404 }
00405 }
00406 coeff_idx+=run;
00407 cg = FFMIN(vp6_coeff_groups[coeff_idx], 3);
00408 vlc_coeff = &s->ract_vlc[pt][ct][cg];
00409 }
00410 }
00411 }
00412
00413 static void vp6_parse_coeff(VP56Context *s)
00414 {
00415 VP56RangeCoder *c = s->ccp;
00416 VP56Model *model = s->modelp;
00417 uint8_t *permute = s->scantable.permutated;
00418 uint8_t *model1, *model2, *model3;
00419 int coeff, sign, coeff_idx;
00420 int b, i, cg, idx, ctx;
00421 int pt = 0;
00422
00423 for (b=0; b<6; b++) {
00424 int ct = 1;
00425 int run = 1;
00426
00427 if (b > 3) pt = 1;
00428
00429 ctx = s->left_block[vp56_b6to4[b]].not_null_dc
00430 + s->above_blocks[s->above_block_idx[b]].not_null_dc;
00431 model1 = model->coeff_dccv[pt];
00432 model2 = model->coeff_dcct[pt][ctx];
00433
00434 for (coeff_idx=0; coeff_idx<64; ) {
00435 if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) {
00436
00437 if (vp56_rac_get_prob(c, model2[2])) {
00438 if (vp56_rac_get_prob(c, model2[3])) {
00439 idx = vp56_rac_get_tree(c, vp56_pc_tree, model1);
00440 coeff = vp56_coeff_bias[idx+5];
00441 for (i=vp56_coeff_bit_length[idx]; i>=0; i--)
00442 coeff += vp56_rac_get_prob(c, vp56_coeff_parse_table[idx][i]) << i;
00443 } else {
00444 if (vp56_rac_get_prob(c, model2[4]))
00445 coeff = 3 + vp56_rac_get_prob(c, model1[5]);
00446 else
00447 coeff = 2;
00448 }
00449 ct = 2;
00450 } else {
00451 ct = 1;
00452 coeff = 1;
00453 }
00454 sign = vp56_rac_get(c);
00455 coeff = (coeff ^ -sign) + sign;
00456 if (coeff_idx)
00457 coeff *= s->dequant_ac;
00458 idx = model->coeff_index_to_pos[coeff_idx];
00459 s->block_coeff[b][permute[idx]] = coeff;
00460 run = 1;
00461 } else {
00462
00463 ct = 0;
00464 if (coeff_idx > 0) {
00465 if (!vp56_rac_get_prob(c, model2[1]))
00466 break;
00467
00468 model3 = model->coeff_runv[coeff_idx >= 6];
00469 run = vp56_rac_get_tree(c, vp6_pcr_tree, model3);
00470 if (!run)
00471 for (run=9, i=0; i<6; i++)
00472 run += vp56_rac_get_prob(c, model3[i+8]) << i;
00473 }
00474 }
00475
00476 cg = vp6_coeff_groups[coeff_idx+=run];
00477 model1 = model2 = model->coeff_ract[pt][ct][cg];
00478 }
00479
00480 s->left_block[vp56_b6to4[b]].not_null_dc =
00481 s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0];
00482 }
00483 }
00484
00485 static int vp6_block_variance(uint8_t *src, int stride)
00486 {
00487 int sum = 0, square_sum = 0;
00488 int y, x;
00489
00490 for (y=0; y<8; y+=2) {
00491 for (x=0; x<8; x+=2) {
00492 sum += src[x];
00493 square_sum += src[x]*src[x];
00494 }
00495 src += 2*stride;
00496 }
00497 return (16*square_sum - sum*sum) >> 8;
00498 }
00499
00500 static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride,
00501 int delta, const int16_t *weights)
00502 {
00503 int x, y;
00504
00505 for (y=0; y<8; y++) {
00506 for (x=0; x<8; x++) {
00507 dst[x] = av_clip_uint8(( src[x-delta ] * weights[0]
00508 + src[x ] * weights[1]
00509 + src[x+delta ] * weights[2]
00510 + src[x+2*delta] * weights[3] + 64) >> 7);
00511 }
00512 src += stride;
00513 dst += stride;
00514 }
00515 }
00516
00517 static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src,
00518 int stride, int h_weight, int v_weight)
00519 {
00520 uint8_t *tmp = s->edge_emu_buffer+16;
00521 s->dsp.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0);
00522 s->dsp.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight);
00523 }
00524
00525 static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src,
00526 int offset1, int offset2, int stride,
00527 VP56mv mv, int mask, int select, int luma)
00528 {
00529 int filter4 = 0;
00530 int x8 = mv.x & mask;
00531 int y8 = mv.y & mask;
00532
00533 if (luma) {
00534 x8 *= 2;
00535 y8 *= 2;
00536 filter4 = s->filter_mode;
00537 if (filter4 == 2) {
00538 if (s->max_vector_length &&
00539 (FFABS(mv.x) > s->max_vector_length ||
00540 FFABS(mv.y) > s->max_vector_length)) {
00541 filter4 = 0;
00542 } else if (s->sample_variance_threshold
00543 && (vp6_block_variance(src+offset1, stride)
00544 < s->sample_variance_threshold)) {
00545 filter4 = 0;
00546 }
00547 }
00548 }
00549
00550 if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) {
00551 offset1 = offset2;
00552 }
00553
00554 if (filter4) {
00555 if (!y8) {
00556 vp6_filter_hv4(dst, src+offset1, stride, 1,
00557 vp6_block_copy_filter[select][x8]);
00558 } else if (!x8) {
00559 vp6_filter_hv4(dst, src+offset1, stride, stride,
00560 vp6_block_copy_filter[select][y8]);
00561 } else {
00562 s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride,
00563 vp6_block_copy_filter[select][x8],
00564 vp6_block_copy_filter[select][y8]);
00565 }
00566 } else {
00567 if (!x8 || !y8) {
00568 s->dsp.put_h264_chroma_pixels_tab[0](dst, src+offset1, stride, 8, x8, y8);
00569 } else {
00570 vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8);
00571 }
00572 }
00573 }
00574
00575 static av_cold int vp6_decode_init(AVCodecContext *avctx)
00576 {
00577 VP56Context *s = avctx->priv_data;
00578
00579 ff_vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6,
00580 avctx->codec->id == CODEC_ID_VP6A);
00581 s->vp56_coord_div = vp6_coord_div;
00582 s->parse_vector_adjustment = vp6_parse_vector_adjustment;
00583 s->filter = vp6_filter;
00584 s->default_models_init = vp6_default_models_init;
00585 s->parse_vector_models = vp6_parse_vector_models;
00586 s->parse_coeff_models = vp6_parse_coeff_models;
00587 s->parse_header = vp6_parse_header;
00588
00589 return 0;
00590 }
00591
00592 static av_cold int vp6_decode_free(AVCodecContext *avctx)
00593 {
00594 VP56Context *s = avctx->priv_data;
00595 int pt, ct, cg;
00596
00597 ff_vp56_free(avctx);
00598
00599 for (pt=0; pt<2; pt++) {
00600 free_vlc(&s->dccv_vlc[pt]);
00601 free_vlc(&s->runv_vlc[pt]);
00602 for (ct=0; ct<3; ct++)
00603 for (cg=0; cg<6; cg++)
00604 free_vlc(&s->ract_vlc[pt][ct][cg]);
00605 }
00606 return 0;
00607 }
00608
00609 AVCodec ff_vp6_decoder = {
00610 "vp6",
00611 AVMEDIA_TYPE_VIDEO,
00612 CODEC_ID_VP6,
00613 sizeof(VP56Context),
00614 vp6_decode_init,
00615 NULL,
00616 vp6_decode_free,
00617 ff_vp56_decode_frame,
00618 CODEC_CAP_DR1,
00619 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"),
00620 };
00621
00622
00623 AVCodec ff_vp6f_decoder = {
00624 "vp6f",
00625 AVMEDIA_TYPE_VIDEO,
00626 CODEC_ID_VP6F,
00627 sizeof(VP56Context),
00628 vp6_decode_init,
00629 NULL,
00630 vp6_decode_free,
00631 ff_vp56_decode_frame,
00632 CODEC_CAP_DR1,
00633 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
00634 };
00635
00636
00637 AVCodec ff_vp6a_decoder = {
00638 "vp6a",
00639 AVMEDIA_TYPE_VIDEO,
00640 CODEC_ID_VP6A,
00641 sizeof(VP56Context),
00642 vp6_decode_init,
00643 NULL,
00644 vp6_decode_free,
00645 ff_vp56_decode_frame,
00646 CODEC_CAP_DR1,
00647 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
00648 };