| /* |
| * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * VP6 compatible video decoder |
| * |
| * The VP6F decoder accepts an optional 1 byte extradata. It is composed of: |
| * - upper 4 bits: difference between encoded width and visible width |
| * - lower 4 bits: difference between encoded height and visible height |
| */ |
| |
| #include <stdlib.h> |
| |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "huffman.h" |
| #include "internal.h" |
| |
| #include "vp56.h" |
| #include "vp56data.h" |
| #include "vp6data.h" |
| |
| #define VP6_MAX_HUFF_SIZE 12 |
| |
| static void vp6_parse_coeff(VP56Context *s); |
| static void vp6_parse_coeff_huffman(VP56Context *s); |
| |
| static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size) |
| { |
| VP56RangeCoder *c = &s->c; |
| int parse_filter_info = 0; |
| int coeff_offset = 0; |
| int vrt_shift = 0; |
| int sub_version; |
| int rows, cols; |
| int res = 0; |
| int separated_coeff = buf[0] & 1; |
| |
| s->frames[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80); |
| ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F); |
| |
| if (s->frames[VP56_FRAME_CURRENT]->key_frame) { |
| sub_version = buf[1] >> 3; |
| if (sub_version > 8) |
| return AVERROR_INVALIDDATA; |
| s->filter_header = buf[1] & 0x06; |
| if (buf[1] & 1) { |
| avpriv_report_missing_feature(s->avctx, "Interlacing"); |
| return AVERROR_PATCHWELCOME; |
| } |
| if (separated_coeff || !s->filter_header) { |
| coeff_offset = AV_RB16(buf+2) - 2; |
| buf += 2; |
| buf_size -= 2; |
| } |
| |
| rows = buf[2]; /* number of stored macroblock rows */ |
| cols = buf[3]; /* number of stored macroblock cols */ |
| /* buf[4] is number of displayed macroblock rows */ |
| /* buf[5] is number of displayed macroblock cols */ |
| if (!rows || !cols) { |
| av_log(s->avctx, AV_LOG_ERROR, "Invalid size %dx%d\n", cols << 4, rows << 4); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (!s->macroblocks || /* first frame */ |
| 16*cols != s->avctx->coded_width || |
| 16*rows != s->avctx->coded_height) { |
| if (s->avctx->extradata_size == 0 && |
| FFALIGN(s->avctx->width, 16) == 16 * cols && |
| FFALIGN(s->avctx->height, 16) == 16 * rows) { |
| // We assume this is properly signalled container cropping, |
| // in an F4V file. Just set the coded_width/height, don't |
| // touch the cropped ones. |
| s->avctx->coded_width = 16 * cols; |
| s->avctx->coded_height = 16 * rows; |
| } else { |
| int ret = ff_set_dimensions(s->avctx, 16 * cols, 16 * rows); |
| if (ret < 0) |
| return ret; |
| |
| if (s->avctx->extradata_size == 1) { |
| s->avctx->width -= s->avctx->extradata[0] >> 4; |
| s->avctx->height -= s->avctx->extradata[0] & 0x0F; |
| } |
| } |
| res = VP56_SIZE_CHANGE; |
| } |
| |
| ff_vp56_init_range_decoder(c, buf+6, buf_size-6); |
| vp56_rac_gets(c, 2); |
| |
| parse_filter_info = s->filter_header; |
| if (sub_version < 8) |
| vrt_shift = 5; |
| s->sub_version = sub_version; |
| s->golden_frame = 0; |
| } else { |
| if (!s->sub_version || !s->avctx->coded_width || !s->avctx->coded_height) |
| return AVERROR_INVALIDDATA; |
| |
| if (separated_coeff || !s->filter_header) { |
| coeff_offset = AV_RB16(buf+1) - 2; |
| buf += 2; |
| buf_size -= 2; |
| } |
| ff_vp56_init_range_decoder(c, buf+1, buf_size-1); |
| |
| s->golden_frame = vp56_rac_get(c); |
| if (s->filter_header) { |
| s->deblock_filtering = vp56_rac_get(c); |
| if (s->deblock_filtering) |
| vp56_rac_get(c); |
| if (s->sub_version > 7) |
| parse_filter_info = vp56_rac_get(c); |
| } |
| } |
| |
| if (parse_filter_info) { |
| if (vp56_rac_get(c)) { |
| s->filter_mode = 2; |
| s->sample_variance_threshold = vp56_rac_gets(c, 5) << vrt_shift; |
| s->max_vector_length = 2 << vp56_rac_gets(c, 3); |
| } else if (vp56_rac_get(c)) { |
| s->filter_mode = 1; |
| } else { |
| s->filter_mode = 0; |
| } |
| if (s->sub_version > 7) |
| s->filter_selection = vp56_rac_gets(c, 4); |
| else |
| s->filter_selection = 16; |
| } |
| |
| s->use_huffman = vp56_rac_get(c); |
| |
| s->parse_coeff = vp6_parse_coeff; |
| if (coeff_offset) { |
| buf += coeff_offset; |
| buf_size -= coeff_offset; |
| if (buf_size < 0) { |
| if (s->frames[VP56_FRAME_CURRENT]->key_frame) |
| ff_set_dimensions(s->avctx, 0, 0); |
| return AVERROR_INVALIDDATA; |
| } |
| if (s->use_huffman) { |
| s->parse_coeff = vp6_parse_coeff_huffman; |
| init_get_bits(&s->gb, buf, buf_size<<3); |
| } else { |
| ff_vp56_init_range_decoder(&s->cc, buf, buf_size); |
| s->ccp = &s->cc; |
| } |
| } else { |
| s->ccp = &s->c; |
| } |
| |
| return res; |
| } |
| |
| static void vp6_coeff_order_table_init(VP56Context *s) |
| { |
| int i, pos, idx = 1; |
| |
| s->modelp->coeff_index_to_pos[0] = 0; |
| for (i=0; i<16; i++) |
| for (pos=1; pos<64; pos++) |
| if (s->modelp->coeff_reorder[pos] == i) |
| s->modelp->coeff_index_to_pos[idx++] = pos; |
| } |
| |
| static void vp6_default_models_init(VP56Context *s) |
| { |
| VP56Model *model = s->modelp; |
| |
| model->vector_dct[0] = 0xA2; |
| model->vector_dct[1] = 0xA4; |
| model->vector_sig[0] = 0x80; |
| model->vector_sig[1] = 0x80; |
| |
| memcpy(model->mb_types_stats, ff_vp56_def_mb_types_stats, sizeof(model->mb_types_stats)); |
| memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv)); |
| memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv)); |
| memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv)); |
| memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder)); |
| |
| vp6_coeff_order_table_init(s); |
| } |
| |
| static void vp6_parse_vector_models(VP56Context *s) |
| { |
| VP56RangeCoder *c = &s->c; |
| VP56Model *model = s->modelp; |
| int comp, node; |
| |
| for (comp=0; comp<2; comp++) { |
| if (vp56_rac_get_prob_branchy(c, vp6_sig_dct_pct[comp][0])) |
| model->vector_dct[comp] = vp56_rac_gets_nn(c, 7); |
| if (vp56_rac_get_prob_branchy(c, vp6_sig_dct_pct[comp][1])) |
| model->vector_sig[comp] = vp56_rac_gets_nn(c, 7); |
| } |
| |
| for (comp=0; comp<2; comp++) |
| for (node=0; node<7; node++) |
| if (vp56_rac_get_prob_branchy(c, vp6_pdv_pct[comp][node])) |
| model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7); |
| |
| for (comp=0; comp<2; comp++) |
| for (node=0; node<8; node++) |
| if (vp56_rac_get_prob_branchy(c, vp6_fdv_pct[comp][node])) |
| model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7); |
| } |
| |
| /* nodes must ascend by count, but with descending symbol order */ |
| static int vp6_huff_cmp(const void *va, const void *vb) |
| { |
| const Node *a = va, *b = vb; |
| return (a->count - b->count)*16 + (b->sym - a->sym); |
| } |
| |
| static int vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[], |
| const uint8_t *map, unsigned size, VLC *vlc) |
| { |
| Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size]; |
| int a, b, i; |
| |
| /* first compute probabilities from model */ |
| tmp[0].count = 256; |
| for (i=0; i<size-1; i++) { |
| a = tmp[i].count * coeff_model[i] >> 8; |
| b = tmp[i].count * (255 - coeff_model[i]) >> 8; |
| nodes[map[2*i ]].count = a + !a; |
| nodes[map[2*i+1]].count = b + !b; |
| } |
| |
| ff_free_vlc(vlc); |
| /* then build the huffman tree according to probabilities */ |
| return ff_huff_build_tree(s->avctx, vlc, size, FF_HUFFMAN_BITS, |
| nodes, vp6_huff_cmp, |
| FF_HUFFMAN_FLAG_HNODE_FIRST); |
| } |
| |
| static int vp6_parse_coeff_models(VP56Context *s) |
| { |
| VP56RangeCoder *c = &s->c; |
| VP56Model *model = s->modelp; |
| int def_prob[11]; |
| int node, cg, ctx, pos; |
| int ct; /* code type */ |
| int pt; /* plane type (0 for Y, 1 for U or V) */ |
| |
| memset(def_prob, 0x80, sizeof(def_prob)); |
| |
| for (pt=0; pt<2; pt++) |
| for (node=0; node<11; node++) |
| if (vp56_rac_get_prob_branchy(c, vp6_dccv_pct[pt][node])) { |
| def_prob[node] = vp56_rac_gets_nn(c, 7); |
| model->coeff_dccv[pt][node] = def_prob[node]; |
| } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) { |
| model->coeff_dccv[pt][node] = def_prob[node]; |
| } |
| |
| if (vp56_rac_get(c)) { |
| for (pos=1; pos<64; pos++) |
| if (vp56_rac_get_prob_branchy(c, vp6_coeff_reorder_pct[pos])) |
| model->coeff_reorder[pos] = vp56_rac_gets(c, 4); |
| vp6_coeff_order_table_init(s); |
| } |
| |
| for (cg=0; cg<2; cg++) |
| for (node=0; node<14; node++) |
| if (vp56_rac_get_prob_branchy(c, vp6_runv_pct[cg][node])) |
| model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7); |
| |
| for (ct=0; ct<3; ct++) |
| for (pt=0; pt<2; pt++) |
| for (cg=0; cg<6; cg++) |
| for (node=0; node<11; node++) |
| if (vp56_rac_get_prob_branchy(c, vp6_ract_pct[ct][pt][cg][node])) { |
| def_prob[node] = vp56_rac_gets_nn(c, 7); |
| model->coeff_ract[pt][ct][cg][node] = def_prob[node]; |
| } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) { |
| model->coeff_ract[pt][ct][cg][node] = def_prob[node]; |
| } |
| |
| if (s->use_huffman) { |
| for (pt=0; pt<2; pt++) { |
| if (vp6_build_huff_tree(s, model->coeff_dccv[pt], |
| vp6_huff_coeff_map, 12, &s->dccv_vlc[pt])) |
| return -1; |
| if (vp6_build_huff_tree(s, model->coeff_runv[pt], |
| vp6_huff_run_map, 9, &s->runv_vlc[pt])) |
| return -1; |
| for (ct=0; ct<3; ct++) |
| for (cg = 0; cg < 6; cg++) |
| if (vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg], |
| vp6_huff_coeff_map, 12, |
| &s->ract_vlc[pt][ct][cg])) |
| return -1; |
| } |
| memset(s->nb_null, 0, sizeof(s->nb_null)); |
| } else { |
| /* coeff_dcct is a linear combination of coeff_dccv */ |
| for (pt=0; pt<2; pt++) |
| for (ctx=0; ctx<3; ctx++) |
| for (node=0; node<5; node++) |
| 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); |
| } |
| return 0; |
| } |
| |
| static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect) |
| { |
| VP56RangeCoder *c = &s->c; |
| VP56Model *model = s->modelp; |
| int comp; |
| |
| *vect = (VP56mv) {0,0}; |
| if (s->vector_candidate_pos < 2) |
| *vect = s->vector_candidate[0]; |
| |
| for (comp=0; comp<2; comp++) { |
| int i, delta = 0; |
| |
| if (vp56_rac_get_prob_branchy(c, model->vector_dct[comp])) { |
| static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4}; |
| for (i=0; i<sizeof(prob_order); i++) { |
| int j = prob_order[i]; |
| delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])<<j; |
| } |
| if (delta & 0xF0) |
| delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3; |
| else |
| delta |= 8; |
| } else { |
| delta = vp56_rac_get_tree(c, ff_vp56_pva_tree, |
| model->vector_pdv[comp]); |
| } |
| |
| if (delta && vp56_rac_get_prob_branchy(c, model->vector_sig[comp])) |
| delta = -delta; |
| |
| if (!comp) |
| vect->x += delta; |
| else |
| vect->y += delta; |
| } |
| } |
| |
| /** |
| * Read number of consecutive blocks with null DC or AC. |
| * This value is < 74. |
| */ |
| static unsigned vp6_get_nb_null(VP56Context *s) |
| { |
| unsigned val = get_bits(&s->gb, 2); |
| if (val == 2) |
| val += get_bits(&s->gb, 2); |
| else if (val == 3) { |
| val = get_bits1(&s->gb) << 2; |
| val = 6+val + get_bits(&s->gb, 2+val); |
| } |
| return val; |
| } |
| |
| static void vp6_parse_coeff_huffman(VP56Context *s) |
| { |
| VP56Model *model = s->modelp; |
| uint8_t *permute = s->idct_scantable; |
| VLC *vlc_coeff; |
| int coeff, sign, coeff_idx; |
| int b, cg, idx; |
| int pt = 0; /* plane type (0 for Y, 1 for U or V) */ |
| |
| for (b=0; b<6; b++) { |
| int ct = 0; /* code type */ |
| if (b > 3) pt = 1; |
| vlc_coeff = &s->dccv_vlc[pt]; |
| |
| for (coeff_idx = 0;;) { |
| int run = 1; |
| if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) { |
| s->nb_null[coeff_idx][pt]--; |
| if (coeff_idx) |
| break; |
| } else { |
| if (get_bits_left(&s->gb) <= 0) |
| return; |
| coeff = get_vlc2(&s->gb, vlc_coeff->table, FF_HUFFMAN_BITS, 3); |
| if (coeff == 0) { |
| if (coeff_idx) { |
| int pt = (coeff_idx >= 6); |
| run += get_vlc2(&s->gb, s->runv_vlc[pt].table, FF_HUFFMAN_BITS, 3); |
| if (run >= 9) |
| run += get_bits(&s->gb, 6); |
| } else |
| s->nb_null[0][pt] = vp6_get_nb_null(s); |
| ct = 0; |
| } else if (coeff == 11) { /* end of block */ |
| if (coeff_idx == 1) /* first AC coeff ? */ |
| s->nb_null[1][pt] = vp6_get_nb_null(s); |
| break; |
| } else { |
| int coeff2 = ff_vp56_coeff_bias[coeff]; |
| if (coeff > 4) |
| coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11); |
| ct = 1 + (coeff2 > 1); |
| sign = get_bits1(&s->gb); |
| coeff2 = (coeff2 ^ -sign) + sign; |
| if (coeff_idx) |
| coeff2 *= s->dequant_ac; |
| idx = model->coeff_index_to_pos[coeff_idx]; |
| s->block_coeff[b][permute[idx]] = coeff2; |
| } |
| } |
| coeff_idx+=run; |
| if (coeff_idx >= 64) |
| break; |
| cg = FFMIN(vp6_coeff_groups[coeff_idx], 3); |
| vlc_coeff = &s->ract_vlc[pt][ct][cg]; |
| } |
| } |
| } |
| |
| static void vp6_parse_coeff(VP56Context *s) |
| { |
| VP56RangeCoder *c = s->ccp; |
| VP56Model *model = s->modelp; |
| uint8_t *permute = s->idct_scantable; |
| uint8_t *model1, *model2, *model3; |
| int coeff, sign, coeff_idx; |
| int b, i, cg, idx, ctx; |
| int pt = 0; /* plane type (0 for Y, 1 for U or V) */ |
| |
| for (b=0; b<6; b++) { |
| int ct = 1; /* code type */ |
| int run = 1; |
| |
| if (b > 3) pt = 1; |
| |
| ctx = s->left_block[ff_vp56_b6to4[b]].not_null_dc |
| + s->above_blocks[s->above_block_idx[b]].not_null_dc; |
| model1 = model->coeff_dccv[pt]; |
| model2 = model->coeff_dcct[pt][ctx]; |
| |
| coeff_idx = 0; |
| for (;;) { |
| if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob_branchy(c, model2[0])) { |
| /* parse a coeff */ |
| if (vp56_rac_get_prob_branchy(c, model2[2])) { |
| if (vp56_rac_get_prob_branchy(c, model2[3])) { |
| idx = vp56_rac_get_tree(c, ff_vp56_pc_tree, model1); |
| coeff = ff_vp56_coeff_bias[idx+5]; |
| for (i=ff_vp56_coeff_bit_length[idx]; i>=0; i--) |
| coeff += vp56_rac_get_prob(c, ff_vp56_coeff_parse_table[idx][i]) << i; |
| } else { |
| if (vp56_rac_get_prob_branchy(c, model2[4])) |
| coeff = 3 + vp56_rac_get_prob(c, model1[5]); |
| else |
| coeff = 2; |
| } |
| ct = 2; |
| } else { |
| ct = 1; |
| coeff = 1; |
| } |
| sign = vp56_rac_get(c); |
| coeff = (coeff ^ -sign) + sign; |
| if (coeff_idx) |
| coeff *= s->dequant_ac; |
| idx = model->coeff_index_to_pos[coeff_idx]; |
| s->block_coeff[b][permute[idx]] = coeff; |
| run = 1; |
| } else { |
| /* parse a run */ |
| ct = 0; |
| if (coeff_idx > 0) { |
| if (!vp56_rac_get_prob_branchy(c, model2[1])) |
| break; |
| |
| model3 = model->coeff_runv[coeff_idx >= 6]; |
| run = vp56_rac_get_tree(c, vp6_pcr_tree, model3); |
| if (!run) |
| for (run=9, i=0; i<6; i++) |
| run += vp56_rac_get_prob(c, model3[i+8]) << i; |
| } |
| } |
| coeff_idx += run; |
| if (coeff_idx >= 64) |
| break; |
| cg = vp6_coeff_groups[coeff_idx]; |
| model1 = model2 = model->coeff_ract[pt][ct][cg]; |
| } |
| |
| s->left_block[ff_vp56_b6to4[b]].not_null_dc = |
| s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0]; |
| } |
| } |
| |
| static int vp6_block_variance(uint8_t *src, int stride) |
| { |
| int sum = 0, square_sum = 0; |
| int y, x; |
| |
| for (y=0; y<8; y+=2) { |
| for (x=0; x<8; x+=2) { |
| sum += src[x]; |
| square_sum += src[x]*src[x]; |
| } |
| src += 2*stride; |
| } |
| return (16*square_sum - sum*sum) >> 8; |
| } |
| |
| static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride, |
| int delta, const int16_t *weights) |
| { |
| int x, y; |
| |
| for (y=0; y<8; y++) { |
| for (x=0; x<8; x++) { |
| dst[x] = av_clip_uint8(( src[x-delta ] * weights[0] |
| + src[x ] * weights[1] |
| + src[x+delta ] * weights[2] |
| + src[x+2*delta] * weights[3] + 64) >> 7); |
| } |
| src += stride; |
| dst += stride; |
| } |
| } |
| |
| static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src, |
| int stride, int h_weight, int v_weight) |
| { |
| uint8_t *tmp = s->edge_emu_buffer+16; |
| s->h264chroma.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0); |
| s->h264chroma.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight); |
| } |
| |
| static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src, |
| int offset1, int offset2, int stride, |
| VP56mv mv, int mask, int select, int luma) |
| { |
| int filter4 = 0; |
| int x8 = mv.x & mask; |
| int y8 = mv.y & mask; |
| |
| if (luma) { |
| x8 *= 2; |
| y8 *= 2; |
| filter4 = s->filter_mode; |
| if (filter4 == 2) { |
| if (s->max_vector_length && |
| (FFABS(mv.x) > s->max_vector_length || |
| FFABS(mv.y) > s->max_vector_length)) { |
| filter4 = 0; |
| } else if (s->sample_variance_threshold |
| && (vp6_block_variance(src+offset1, stride) |
| < s->sample_variance_threshold)) { |
| filter4 = 0; |
| } |
| } |
| } |
| |
| if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) { |
| offset1 = offset2; |
| } |
| |
| if (filter4) { |
| if (!y8) { /* left or right combine */ |
| vp6_filter_hv4(dst, src+offset1, stride, 1, |
| vp6_block_copy_filter[select][x8]); |
| } else if (!x8) { /* above or below combine */ |
| vp6_filter_hv4(dst, src+offset1, stride, stride, |
| vp6_block_copy_filter[select][y8]); |
| } else { |
| s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride, |
| vp6_block_copy_filter[select][x8], |
| vp6_block_copy_filter[select][y8]); |
| } |
| } else { |
| if (!x8 || !y8) { |
| s->h264chroma.put_h264_chroma_pixels_tab[0](dst, src + offset1, stride, 8, x8, y8); |
| } else { |
| vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8); |
| } |
| } |
| } |
| |
| static av_cold void vp6_decode_init_context(VP56Context *s); |
| |
| static av_cold int vp6_decode_init(AVCodecContext *avctx) |
| { |
| VP56Context *s = avctx->priv_data; |
| int ret; |
| |
| if ((ret = ff_vp56_init(avctx, avctx->codec->id == AV_CODEC_ID_VP6, |
| avctx->codec->id == AV_CODEC_ID_VP6A)) < 0) |
| return ret; |
| |
| vp6_decode_init_context(s); |
| |
| if (s->has_alpha) { |
| s->alpha_context = av_mallocz(sizeof(VP56Context)); |
| ff_vp56_init_context(avctx, s->alpha_context, |
| s->flip == -1, s->has_alpha); |
| vp6_decode_init_context(s->alpha_context); |
| } |
| |
| return 0; |
| } |
| |
| static av_cold void vp6_decode_init_context(VP56Context *s) |
| { |
| s->deblock_filtering = 0; |
| s->vp56_coord_div = vp6_coord_div; |
| s->parse_vector_adjustment = vp6_parse_vector_adjustment; |
| s->filter = vp6_filter; |
| s->default_models_init = vp6_default_models_init; |
| s->parse_vector_models = vp6_parse_vector_models; |
| s->parse_coeff_models = vp6_parse_coeff_models; |
| s->parse_header = vp6_parse_header; |
| } |
| |
| static av_cold void vp6_decode_free_context(VP56Context *s); |
| |
| static av_cold int vp6_decode_free(AVCodecContext *avctx) |
| { |
| VP56Context *s = avctx->priv_data; |
| |
| ff_vp56_free(avctx); |
| vp6_decode_free_context(s); |
| |
| if (s->alpha_context) { |
| ff_vp56_free_context(s->alpha_context); |
| vp6_decode_free_context(s->alpha_context); |
| av_freep(&s->alpha_context); |
| } |
| |
| return 0; |
| } |
| |
| static av_cold void vp6_decode_free_context(VP56Context *s) |
| { |
| int pt, ct, cg; |
| |
| for (pt=0; pt<2; pt++) { |
| ff_free_vlc(&s->dccv_vlc[pt]); |
| ff_free_vlc(&s->runv_vlc[pt]); |
| for (ct=0; ct<3; ct++) |
| for (cg=0; cg<6; cg++) |
| ff_free_vlc(&s->ract_vlc[pt][ct][cg]); |
| } |
| } |
| |
| AVCodec ff_vp6_decoder = { |
| .name = "vp6", |
| .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_VP6, |
| .priv_data_size = sizeof(VP56Context), |
| .init = vp6_decode_init, |
| .close = vp6_decode_free, |
| .decode = ff_vp56_decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |
| |
| /* flash version, not flipped upside-down */ |
| AVCodec ff_vp6f_decoder = { |
| .name = "vp6f", |
| .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_VP6F, |
| .priv_data_size = sizeof(VP56Context), |
| .init = vp6_decode_init, |
| .close = vp6_decode_free, |
| .decode = ff_vp56_decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |
| |
| /* flash version, not flipped upside-down, with alpha channel */ |
| AVCodec ff_vp6a_decoder = { |
| .name = "vp6a", |
| .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_VP6A, |
| .priv_data_size = sizeof(VP56Context), |
| .init = vp6_decode_init, |
| .close = vp6_decode_free, |
| .decode = ff_vp56_decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS, |
| }; |
