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Diffstat (limited to 'contrib/ffmpeg/libavcodec/vp6.c')
-rw-r--r--contrib/ffmpeg/libavcodec/vp6.c556
1 files changed, 0 insertions, 556 deletions
diff --git a/contrib/ffmpeg/libavcodec/vp6.c b/contrib/ffmpeg/libavcodec/vp6.c
deleted file mode 100644
index 2e904b7e0..000000000
--- a/contrib/ffmpeg/libavcodec/vp6.c
+++ /dev/null
@@ -1,556 +0,0 @@
-/**
- * @file vp6.c
- * VP6 compatible video decoder
- *
- * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- *
- * The VP6F decoder accept an optional 1 byte extradata. It is composed of:
- * - upper 4bits: difference between encoded width and visible width
- * - lower 4bits: difference between encoded height and visible height
- */
-
-#include <stdlib.h>
-
-#include "avcodec.h"
-#include "dsputil.h"
-#include "bitstream.h"
-#include "mpegvideo.h"
-
-#include "vp56.h"
-#include "vp56data.h"
-#include "vp6data.h"
-
-
-static int vp6_parse_header(vp56_context_t *s, uint8_t *buf, int buf_size,
- int *golden_frame)
-{
- vp56_range_coder_t *c = &s->c;
- int parse_filter_info = 0;
- int coeff_offset = 0;
- int vrt_shift = 0;
- int sub_version;
- int rows, cols;
- int res = 1;
- int separated_coeff = buf[0] & 1;
-
- s->framep[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80);
- vp56_init_dequant(s, (buf[0] >> 1) & 0x3F);
-
- if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
- sub_version = buf[1] >> 3;
- if (sub_version > 8)
- return 0;
- s->filter_header = buf[1] & 0x06;
- if (buf[1] & 1) {
- av_log(s->avctx, AV_LOG_ERROR, "interlacing not supported\n");
- return 0;
- }
- 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 (16*cols != s->avctx->coded_width ||
- 16*rows != s->avctx->coded_height) {
- avcodec_set_dimensions(s->avctx, 16*cols, 16*rows);
- if (s->avctx->extradata_size == 1) {
- s->avctx->width -= s->avctx->extradata[0] >> 4;
- s->avctx->height -= s->avctx->extradata[0] & 0x0F;
- }
- res = 2;
- }
-
- 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;
- } else {
- if (!s->sub_version)
- return 0;
-
- if (separated_coeff || !s->filter_header) {
- coeff_offset = AV_RB16(buf+1) - 2;
- buf += 2;
- buf_size -= 2;
- }
- vp56_init_range_decoder(c, buf+1, buf_size-1);
-
- *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;
- }
-
- vp56_rac_get(c);
-
- if (coeff_offset) {
- vp56_init_range_decoder(&s->cc, buf+coeff_offset,
- buf_size-coeff_offset);
- s->ccp = &s->cc;
- } else {
- s->ccp = &s->c;
- }
-
- return res;
-}
-
-static void vp6_coeff_order_table_init(vp56_context_t *s)
-{
- int i, pos, idx = 1;
-
- s->coeff_index_to_pos[0] = 0;
- for (i=0; i<16; i++)
- for (pos=1; pos<64; pos++)
- if (s->coeff_reorder[pos] == i)
- s->coeff_index_to_pos[idx++] = pos;
-}
-
-static void vp6_default_models_init(vp56_context_t *s)
-{
- s->vector_model_dct[0] = 0xA2;
- s->vector_model_dct[1] = 0xA4;
- s->vector_model_sig[0] = 0x80;
- s->vector_model_sig[1] = 0x80;
-
- memcpy(s->mb_types_stats, vp56_def_mb_types_stats, sizeof(s->mb_types_stats));
- memcpy(s->vector_model_fdv, vp6_def_fdv_vector_model, sizeof(s->vector_model_fdv));
- memcpy(s->vector_model_pdv, vp6_def_pdv_vector_model, sizeof(s->vector_model_pdv));
- memcpy(s->coeff_model_runv, vp6_def_runv_coeff_model, sizeof(s->coeff_model_runv));
- memcpy(s->coeff_reorder, vp6_def_coeff_reorder, sizeof(s->coeff_reorder));
-
- vp6_coeff_order_table_init(s);
-}
-
-static void vp6_parse_vector_models(vp56_context_t *s)
-{
- vp56_range_coder_t *c = &s->c;
- int comp, node;
-
- for (comp=0; comp<2; comp++) {
- if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][0]))
- s->vector_model_dct[comp] = vp56_rac_gets_nn(c, 7);
- if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][1]))
- s->vector_model_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(c, vp6_pdv_pct[comp][node]))
- s->vector_model_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(c, vp6_fdv_pct[comp][node]))
- s->vector_model_fdv[comp][node] = vp56_rac_gets_nn(c, 7);
-}
-
-static void vp6_parse_coeff_models(vp56_context_t *s)
-{
- vp56_range_coder_t *c = &s->c;
- 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(c, vp6_dccv_pct[pt][node])) {
- def_prob[node] = vp56_rac_gets_nn(c, 7);
- s->coeff_model_dccv[pt][node] = def_prob[node];
- } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
- s->coeff_model_dccv[pt][node] = def_prob[node];
- }
-
- if (vp56_rac_get(c)) {
- for (pos=1; pos<64; pos++)
- if (vp56_rac_get_prob(c, vp6_coeff_reorder_pct[pos]))
- s->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(c, vp6_runv_pct[cg][node]))
- s->coeff_model_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(c, vp6_ract_pct[ct][pt][cg][node])) {
- def_prob[node] = vp56_rac_gets_nn(c, 7);
- s->coeff_model_ract[pt][ct][cg][node] = def_prob[node];
- } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
- s->coeff_model_ract[pt][ct][cg][node] = def_prob[node];
- }
-
- /* coeff_model_dcct is a linear combination of coeff_model_dccv */
- for (pt=0; pt<2; pt++)
- for (ctx=0; ctx<3; ctx++)
- for (node=0; node<5; node++)
- s->coeff_model_dcct[pt][ctx][node] = av_clip(((s->coeff_model_dccv[pt][node] * vp6_dccv_lc[ctx][node][0] + 128) >> 8) + vp6_dccv_lc[ctx][node][1], 1, 255);
-}
-
-static void vp6_parse_vector_adjustment(vp56_context_t *s, vp56_mv_t *vect)
-{
- vp56_range_coder_t *c = &s->c;
- int comp;
-
- *vect = (vp56_mv_t) {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(c, s->vector_model_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, s->vector_model_fdv[comp][j])<<j;
- }
- if (delta & 0xF0)
- delta |= vp56_rac_get_prob(c, s->vector_model_fdv[comp][3])<<3;
- else
- delta |= 8;
- } else {
- delta = vp56_rac_get_tree(c, vp56_pva_tree,
- s->vector_model_pdv[comp]);
- }
-
- if (delta && vp56_rac_get_prob(c, s->vector_model_sig[comp]))
- delta = -delta;
-
- if (!comp)
- vect->x += delta;
- else
- vect->y += delta;
- }
-}
-
-static void vp6_parse_coeff(vp56_context_t *s)
-{
- vp56_range_coder_t *c = s->ccp;
- uint8_t *permute = s->scantable.permutated;
- uint8_t *model, *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[vp56_b6to4[b]].not_null_dc
- + s->above_blocks[s->above_block_idx[b]].not_null_dc;
- model = s->coeff_model_dccv[pt];
- model2 = s->coeff_model_dcct[pt][ctx];
-
- for (coeff_idx=0; coeff_idx<64; ) {
- if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) {
- /* parse a coeff */
- if (coeff_idx == 0) {
- s->left_block[vp56_b6to4[b]].not_null_dc = 1;
- s->above_blocks[s->above_block_idx[b]].not_null_dc = 1;
- }
-
- if (vp56_rac_get_prob(c, model2[2])) {
- if (vp56_rac_get_prob(c, model2[3])) {
- idx = vp56_rac_get_tree(c, vp56_pc_tree, model);
- coeff = vp56_coeff_bias[idx];
- for (i=vp56_coeff_bit_length[idx]; i>=0; i--)
- coeff += vp56_rac_get_prob(c, vp56_coeff_parse_table[idx][i]) << i;
- } else {
- if (vp56_rac_get_prob(c, model2[4]))
- coeff = 3 + vp56_rac_get_prob(c, model[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 = s->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) {
- s->left_block[vp56_b6to4[b]].not_null_dc = 0;
- s->above_blocks[s->above_block_idx[b]].not_null_dc = 0;
- } else {
- if (!vp56_rac_get_prob(c, model2[1]))
- break;
-
- model3 = s->coeff_model_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;
- }
- }
-
- cg = vp6_coeff_groups[coeff_idx+=run];
- model = model2 = s->coeff_model_ract[pt][ct][cg];
- }
- }
-}
-
-static int vp6_adjust(int v, int t)
-{
- int V = v, s = v >> 31;
- V ^= s;
- V -= s;
- if (V-t-1 >= (unsigned)(t-1))
- return v;
- V = 2*t - V;
- V += s;
- V ^= s;
- return V;
-}
-
-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_hv2(vp56_context_t *s, uint8_t *dst, uint8_t *src,
- int stride, int delta, int16_t weight)
-{
- s->dsp.put_pixels_tab[1][0](dst, src, stride, 8);
- s->dsp.biweight_h264_pixels_tab[3](dst, src+delta, stride, 2,
- 8-weight, weight, 0);
-}
-
-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(vp56_context_t *s, uint8_t *dst, uint8_t *src,
- int stride, int h_weight, int v_weight)
-{
- uint8_t *tmp = s->edge_emu_buffer+16;
- int x, xmax;
-
- s->dsp.put_pixels_tab[1][0](tmp, src, stride, 8);
- s->dsp.biweight_h264_pixels_tab[3](tmp, src+1, stride, 2,
- 8-h_weight, h_weight, 0);
- /* we need a 8x9 block to do vertical filter, so compute one more line */
- for (x=8*stride, xmax=x+8; x<xmax; x++)
- tmp[x] = (src[x]*(8-h_weight) + src[x+1]*h_weight + 4) >> 3;
-
- s->dsp.put_pixels_tab[1][0](dst, tmp, stride, 8);
- s->dsp.biweight_h264_pixels_tab[3](dst, tmp+stride, stride, 2,
- 8-v_weight, v_weight, 0);
-}
-
-static void vp6_filter_diag4(uint8_t *dst, uint8_t *src, int stride,
- const int16_t *h_weights,const int16_t *v_weights)
-{
- int x, y;
- int tmp[8*11];
- int *t = tmp;
-
- src -= stride;
-
- for (y=0; y<11; y++) {
- for (x=0; x<8; x++) {
- t[x] = av_clip_uint8(( src[x-1] * h_weights[0]
- + src[x ] * h_weights[1]
- + src[x+1] * h_weights[2]
- + src[x+2] * h_weights[3] + 64) >> 7);
- }
- src += stride;
- t += 8;
- }
-
- t = tmp + 8;
- for (y=0; y<8; y++) {
- for (x=0; x<8; x++) {
- dst[x] = av_clip_uint8(( t[x-8 ] * v_weights[0]
- + t[x ] * v_weights[1]
- + t[x+8 ] * v_weights[2]
- + t[x+16] * v_weights[3] + 64) >> 7);
- }
- dst += stride;
- t += 8;
- }
-}
-
-static void vp6_filter(vp56_context_t *s, uint8_t *dst, uint8_t *src,
- int offset1, int offset2, int stride,
- vp56_mv_t 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 if ((mv.x^mv.y) >> 31) { /* lower-left or upper-right combine */
- vp6_filter_diag4(dst, src+offset1-1, stride,
- vp6_block_copy_filter[select][x8],
- vp6_block_copy_filter[select][y8]);
- } else { /* lower-right or upper-left combine */
- vp6_filter_diag4(dst, src+offset1, stride,
- vp6_block_copy_filter[select][x8],
- vp6_block_copy_filter[select][y8]);
- }
- } else {
- if (!y8) { /* left or right combine */
- vp6_filter_hv2(s, dst, src+offset1, stride, 1, x8);
- } else if (!x8) { /* above or below combine */
- vp6_filter_hv2(s, dst, src+offset1, stride, stride, y8);
- } else if ((mv.x^mv.y) >> 31) { /* lower-left or upper-right combine */
- vp6_filter_diag2(s, dst, src+offset1-1, stride, x8, y8);
- } else { /* lower-right or upper-left combine */
- vp6_filter_diag2(s, dst, src+offset1, stride, x8, y8);
- }
- }
-}
-
-static int vp6_decode_init(AVCodecContext *avctx)
-{
- vp56_context_t *s = avctx->priv_data;
-
- vp56_init(s, avctx, avctx->codec->id == CODEC_ID_VP6);
- s->vp56_coord_div = vp6_coord_div;
- s->parse_vector_adjustment = vp6_parse_vector_adjustment;
- s->adjust = vp6_adjust;
- s->filter = vp6_filter;
- s->parse_coeff = vp6_parse_coeff;
- 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;
-
- return 0;
-}
-
-AVCodec vp6_decoder = {
- "vp6",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VP6,
- sizeof(vp56_context_t),
- vp6_decode_init,
- NULL,
- vp56_free,
- vp56_decode_frame,
-};
-
-/* flash version, not flipped upside-down */
-AVCodec vp6f_decoder = {
- "vp6f",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VP6F,
- sizeof(vp56_context_t),
- vp6_decode_init,
- NULL,
- vp56_free,
- vp56_decode_frame,
-};
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