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vpx/vp9/decoder/decodframe.c
Yaowu Xu 8a336b0d0d silent a lot of MSVC compiler warnings 
there are still a couple type of warning left, which are related to
double constants assigned to float type. As those would be addressed
by the conversion of transforms into integer version. This commit
has left those un-dealt with.

Change-Id: I48fd9b489c0c27ad6b543f4177423419f929f2bb
2012-11-06 09:09:25 -08:00

1340 lines
45 KiB
C
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/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "onyxd_int.h"
#include "vp9/common/header.h"
#include "vp9/common/reconintra.h"
#include "vp9/common/reconintra4x4.h"
#include "vp9/common/reconinter.h"
#include "vp9/decoder/decodframe.h"
#include "detokenize.h"
#include "vp9/common/invtrans.h"
#include "vp9/common/alloccommon.h"
#include "vp9/common/entropymode.h"
#include "vp9/common/quant_common.h"
#include "vpx_scale/vpxscale.h"
#include "vp9/common/setupintrarecon.h"
#include "decodemv.h"
#include "vp9/common/extend.h"
#include "vp9/common/modecont.h"
#include "vpx_mem/vpx_mem.h"
#include "vp9/common/idct.h"
#include "dboolhuff.h"
#include "vp9/common/seg_common.h"
#include "vp9/common/entropy.h"
#include "vpx_rtcd.h"
#include <assert.h>
#include <stdio.h>
#define COEFCOUNT_TESTING
static int merge_index(int v, int n, int modulus) {
int max1 = (n - 1 - modulus / 2) / modulus + 1;
if (v < max1) v = v * modulus + modulus / 2;
else {
int w;
v -= max1;
w = v;
v += (v + modulus - modulus / 2) / modulus;
while (v % modulus == modulus / 2 ||
w != v - (v + modulus - modulus / 2) / modulus) v++;
}
return v;
}
static int inv_remap_prob(int v, int m) {
const int n = 256;
const int modulus = MODULUS_PARAM;
int i;
v = merge_index(v, n - 1, modulus);
if ((m << 1) <= n) {
i = vp9_inv_recenter_nonneg(v + 1, m);
} else {
i = n - 1 - vp9_inv_recenter_nonneg(v + 1, n - 1 - m);
}
return i;
}
static vp9_prob read_prob_diff_update(vp9_reader *const bc, int oldp) {
int delp = vp9_decode_term_subexp(bc, SUBEXP_PARAM, 255);
return (vp9_prob)inv_remap_prob(delp, oldp);
}
void vp9_init_de_quantizer(VP9D_COMP *pbi) {
int i;
int Q;
VP9_COMMON *const pc = &pbi->common;
for (Q = 0; Q < QINDEX_RANGE; Q++) {
pc->Y1dequant[Q][0] = (short)vp9_dc_quant(Q, pc->y1dc_delta_q);
pc->Y2dequant[Q][0] = (short)vp9_dc2quant(Q, pc->y2dc_delta_q);
pc->UVdequant[Q][0] = (short)vp9_dc_uv_quant(Q, pc->uvdc_delta_q);
/* all the ac values =; */
for (i = 1; i < 16; i++) {
int rc = vp9_default_zig_zag1d[i];
pc->Y1dequant[Q][rc] = (short)vp9_ac_yquant(Q);
pc->Y2dequant[Q][rc] = (short)vp9_ac2quant(Q, pc->y2ac_delta_q);
pc->UVdequant[Q][rc] = (short)vp9_ac_uv_quant(Q, pc->uvac_delta_q);
}
}
}
static void mb_init_dequantizer(VP9D_COMP *pbi, MACROBLOCKD *xd) {
int i;
int QIndex;
VP9_COMMON *const pc = &pbi->common;
int segment_id = xd->mode_info_context->mbmi.segment_id;
// Set the Q baseline allowing for any segment level adjustment
if (vp9_segfeature_active(xd, segment_id, SEG_LVL_ALT_Q)) {
/* Abs Value */
if (xd->mb_segment_abs_delta == SEGMENT_ABSDATA)
QIndex = vp9_get_segdata(xd, segment_id, SEG_LVL_ALT_Q);
/* Delta Value */
else {
QIndex = pc->base_qindex +
vp9_get_segdata(xd, segment_id, SEG_LVL_ALT_Q);
QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */
}
} else
QIndex = pc->base_qindex;
xd->q_index = QIndex;
/* Set up the block level dequant pointers */
for (i = 0; i < 16; i++) {
xd->block[i].dequant = pc->Y1dequant[QIndex];
}
#if CONFIG_LOSSLESS
if (!QIndex) {
pbi->common.rtcd.idct.idct1 = vp9_short_inv_walsh4x4_1_x8_c;
pbi->common.rtcd.idct.idct16 = vp9_short_inv_walsh4x4_x8_c;
pbi->common.rtcd.idct.idct1_scalar_add = vp9_dc_only_inv_walsh_add_c;
pbi->common.rtcd.idct.iwalsh1 = vp9_short_inv_walsh4x4_1_lossless_c;
pbi->common.rtcd.idct.iwalsh16 = vp9_short_inv_walsh4x4_lossless_c;
pbi->idct_add = vp9_dequant_idct_add_lossless_c;
pbi->dc_idct_add = vp9_dequant_dc_idct_add_lossless_c;
pbi->dc_idct_add_y_block = vp9_dequant_dc_idct_add_y_block_lossless_c;
pbi->idct_add_y_block = vp9_dequant_idct_add_y_block_lossless_c;
pbi->idct_add_uv_block = vp9_dequant_idct_add_uv_block_lossless_c;
} else {
pbi->common.rtcd.idct.idct1 = vp9_short_idct4x4llm_1_c;
pbi->common.rtcd.idct.idct16 = vp9_short_idct4x4llm_c;
pbi->common.rtcd.idct.idct1_scalar_add = vp9_dc_only_idct_add_c;
pbi->common.rtcd.idct.iwalsh1 = vp9_short_inv_walsh4x4_1_c;
pbi->common.rtcd.idct.iwalsh16 = vp9_short_inv_walsh4x4_c;
pbi->idct_add = vp9_dequant_idct_add;
pbi->dc_idct_add = vp9_dequant_dc_idct_add;
pbi->dc_idct_add_y_block = vp9_dequant_dc_idct_add_y_block;
pbi->idct_add_y_block = vp9_dequant_idct_add_y_block;
pbi->idct_add_uv_block = vp9_dequant_idct_add_uv_block;
}
#else
pbi->idct_add = vp9_dequant_idct_add;
pbi->dc_idct_add = vp9_dequant_dc_idct_add;
pbi->dc_idct_add_y_block = vp9_dequant_dc_idct_add_y_block;
pbi->idct_add_y_block = vp9_dequant_idct_add_y_block;
pbi->idct_add_uv_block = vp9_dequant_idct_add_uv_block;
#endif
for (i = 16; i < 24; i++) {
xd->block[i].dequant = pc->UVdequant[QIndex];
}
xd->block[24].dequant = pc->Y2dequant[QIndex];
}
#if CONFIG_RUNTIME_CPU_DETECT
#define RTCD_VTABLE(x) (&(pbi)->common.rtcd.x)
#else
#define RTCD_VTABLE(x) NULL
#endif
/* skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it
* to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy.
*/
static void skip_recon_mb(VP9D_COMP *pbi, MACROBLOCKD *xd) {
if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
#if CONFIG_SUPERBLOCKS
if (xd->mode_info_context->mbmi.encoded_as_sb) {
vp9_build_intra_predictors_sbuv_s(xd);
vp9_build_intra_predictors_sby_s(xd);
} else {
#endif
vp9_build_intra_predictors_mbuv_s(xd);
vp9_build_intra_predictors_mby_s(xd);
#if CONFIG_SUPERBLOCKS
}
#endif
} else {
#if CONFIG_SUPERBLOCKS
if (xd->mode_info_context->mbmi.encoded_as_sb) {
vp9_build_inter32x32_predictors_sb(xd, xd->dst.y_buffer,
xd->dst.u_buffer, xd->dst.v_buffer,
xd->dst.y_stride, xd->dst.uv_stride);
} else {
#endif
vp9_build_1st_inter16x16_predictors_mb(xd, xd->dst.y_buffer,
xd->dst.u_buffer, xd->dst.v_buffer,
xd->dst.y_stride, xd->dst.uv_stride);
if (xd->mode_info_context->mbmi.second_ref_frame) {
vp9_build_2nd_inter16x16_predictors_mb(xd, xd->dst.y_buffer,
xd->dst.u_buffer, xd->dst.v_buffer,
xd->dst.y_stride, xd->dst.uv_stride);
}
#if CONFIG_SUPERBLOCKS
}
#endif
}
}
static void decode_macroblock(VP9D_COMP *pbi, MACROBLOCKD *xd,
int mb_row, unsigned int mb_col,
BOOL_DECODER* const bc) {
int eobtotal = 0;
MB_PREDICTION_MODE mode;
int i;
int tx_size;
TX_TYPE tx_type;
VP9_COMMON *pc = &pbi->common;
#if CONFIG_SUPERBLOCKS
int orig_skip_flag = xd->mode_info_context->mbmi.mb_skip_coeff;
#endif
// re-initialize macroblock dequantizer before detokenization
if (xd->segmentation_enabled)
mb_init_dequantizer(pbi, xd);
tx_size = xd->mode_info_context->mbmi.txfm_size;
mode = xd->mode_info_context->mbmi.mode;
if (xd->mode_info_context->mbmi.mb_skip_coeff) {
vp9_reset_mb_tokens_context(xd);
#if CONFIG_SUPERBLOCKS
if (xd->mode_info_context->mbmi.encoded_as_sb &&
(mb_col < pc->mb_cols - 1 || mb_row < pc->mb_rows - 1)) {
if (mb_col < pc->mb_cols - 1)
xd->above_context++;
if (mb_row < pc->mb_rows - 1)
xd->left_context++;
vp9_reset_mb_tokens_context(xd);
if (mb_col < pc->mb_cols - 1)
xd->above_context--;
if (mb_row < pc->mb_rows - 1)
xd->left_context--;
}
#endif
} else if (!bool_error(bc)) {
for (i = 0; i < 25; i++) {
xd->block[i].eob = 0;
xd->eobs[i] = 0;
}
if (tx_size == TX_16X16) {
eobtotal = vp9_decode_mb_tokens_16x16(pbi, xd, bc);
} else if (tx_size == TX_8X8) {
eobtotal = vp9_decode_mb_tokens_8x8(pbi, xd, bc);
} else {
eobtotal = vp9_decode_mb_tokens(pbi, xd, bc);
}
}
//mode = xd->mode_info_context->mbmi.mode;
if (pbi->common.frame_type != KEY_FRAME)
vp9_setup_interp_filters(xd, xd->mode_info_context->mbmi.interp_filter,
&pbi->common);
if (eobtotal == 0 && mode != B_PRED && mode != SPLITMV
&& mode != I8X8_PRED
&& !bool_error(bc)) {
/* Special case: Force the loopfilter to skip when eobtotal and
* mb_skip_coeff are zero.
* */
xd->mode_info_context->mbmi.mb_skip_coeff = 1;
#if CONFIG_SUPERBLOCKS
if (!xd->mode_info_context->mbmi.encoded_as_sb || orig_skip_flag)
#endif
{
skip_recon_mb(pbi, xd);
return;
}
}
// moved to be performed before detokenization
// if (xd->segmentation_enabled)
// mb_init_dequantizer(pbi, xd);
/* do prediction */
if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
#if CONFIG_SUPERBLOCKS
if (xd->mode_info_context->mbmi.encoded_as_sb) {
vp9_build_intra_predictors_sby_s(xd);
vp9_build_intra_predictors_sbuv_s(xd);
} else
#endif
if (mode != I8X8_PRED) {
vp9_build_intra_predictors_mbuv(xd);
if (mode != B_PRED) {
vp9_build_intra_predictors_mby(xd);
}
}
} else {
#if CONFIG_SUPERBLOCKS
if (xd->mode_info_context->mbmi.encoded_as_sb) {
vp9_build_inter32x32_predictors_sb(xd, xd->dst.y_buffer,
xd->dst.u_buffer, xd->dst.v_buffer,
xd->dst.y_stride, xd->dst.uv_stride);
} else
#endif
vp9_build_inter_predictors_mb(xd);
}
/* dequantization and idct */
if (mode == I8X8_PRED) {
for (i = 0; i < 4; i++) {
int ib = vp9_i8x8_block[i];
const int iblock[4] = {0, 1, 4, 5};
int j;
int i8x8mode;
BLOCKD *b;
int idx = (ib & 0x02) ? (ib + 2) : ib;
short *q = xd->block[idx].qcoeff;
short *dq = xd->block[0].dequant;
unsigned char *pre = xd->block[ib].predictor;
unsigned char *dst = *(xd->block[ib].base_dst) + xd->block[ib].dst;
int stride = xd->dst.y_stride;
b = &xd->block[ib];
i8x8mode = b->bmi.as_mode.first;
vp9_intra8x8_predict(b, i8x8mode, b->predictor);
if (xd->mode_info_context->mbmi.txfm_size == TX_8X8) {
tx_type = get_tx_type(xd, &xd->block[idx]);
if (tx_type != DCT_DCT) {
vp9_ht_dequant_idct_add_8x8_c(tx_type,
q, dq, pre, dst, 16, stride);
} else {
vp9_dequant_idct_add_8x8_c(q, dq, pre, dst, 16, stride);
}
q += 64;
} else {
for (j = 0; j < 4; j++) {
b = &xd->block[ib + iblock[j]];
vp9_dequant_idct_add(b->qcoeff, b->dequant, b->predictor,
*(b->base_dst) + b->dst, 16, b->dst_stride);
}
}
b = &xd->block[16 + i];
vp9_intra_uv4x4_predict(b, i8x8mode, b->predictor);
pbi->idct_add(b->qcoeff, b->dequant, b->predictor,
*(b->base_dst) + b->dst, 8, b->dst_stride);
b = &xd->block[20 + i];
vp9_intra_uv4x4_predict(b, i8x8mode, b->predictor);
pbi->idct_add(b->qcoeff, b->dequant, b->predictor,
*(b->base_dst) + b->dst, 8, b->dst_stride);
}
} else if (mode == B_PRED) {
for (i = 0; i < 16; i++) {
BLOCKD *b = &xd->block[i];
int b_mode = xd->mode_info_context->bmi[i].as_mode.first;
#if CONFIG_COMP_INTRA_PRED
int b_mode2 = xd->mode_info_context->bmi[i].as_mode.second;
if (b_mode2 == (B_PREDICTION_MODE)(B_DC_PRED - 1)) {
#endif
vp9_intra4x4_predict(b, b_mode, b->predictor);
#if CONFIG_COMP_INTRA_PRED
} else {
vp9_comp_intra4x4_predict(b, b_mode, b_mode2, b->predictor);
}
#endif
tx_type = get_tx_type(xd, b);
if (tx_type != DCT_DCT) {
vp9_ht_dequant_idct_add_c(tx_type, b->qcoeff,
b->dequant, b->predictor,
*(b->base_dst) + b->dst, 16, b->dst_stride);
} else {
vp9_dequant_idct_add(b->qcoeff, b->dequant, b->predictor,
*(b->base_dst) + b->dst, 16, b->dst_stride);
}
}
} else if (mode == SPLITMV) {
if (tx_size == TX_8X8) {
vp9_dequant_idct_add_y_block_8x8(xd->qcoeff, xd->block[0].dequant,
xd->predictor, xd->dst.y_buffer,
xd->dst.y_stride, xd->eobs, xd);
} else {
pbi->idct_add_y_block(xd->qcoeff, xd->block[0].dequant,
xd->predictor, xd->dst.y_buffer,
xd->dst.y_stride, xd->eobs);
}
} else {
BLOCKD *b = &xd->block[24];
if (tx_size == TX_16X16) {
BLOCKD *bd = &xd->block[0];
tx_type = get_tx_type(xd, bd);
if (tx_type != DCT_DCT) {
vp9_ht_dequant_idct_add_16x16_c(tx_type, xd->qcoeff,
xd->block[0].dequant, xd->predictor,
xd->dst.y_buffer, 16, xd->dst.y_stride);
} else {
vp9_dequant_idct_add_16x16(xd->qcoeff, xd->block[0].dequant,
xd->predictor, xd->dst.y_buffer,
16, xd->dst.y_stride);
}
} else if (tx_size == TX_8X8) {
#if CONFIG_SUPERBLOCKS
void *orig = xd->mode_info_context;
int n, num = xd->mode_info_context->mbmi.encoded_as_sb ? 4 : 1;
for (n = 0; n < num; n++) {
int x_idx = n & 1, y_idx = n >> 1;
if (num == 4 && (mb_col + x_idx >= pc->mb_cols ||
mb_row + y_idx >= pc->mb_rows))
continue;
if (n != 0) {
for (i = 0; i < 25; i++) {
xd->block[i].eob = 0;
xd->eobs[i] = 0;
}
xd->above_context = pc->above_context + mb_col + (n & 1);
xd->left_context = pc->left_context + (n >> 1);
xd->mode_info_context = orig;
xd->mode_info_context += (n & 1);
xd->mode_info_context += (n >> 1) * pc->mode_info_stride;
if (!orig_skip_flag) {
eobtotal = vp9_decode_mb_tokens_8x8(pbi, xd, bc);
if (eobtotal == 0) // skip loopfilter
xd->mode_info_context->mbmi.mb_skip_coeff = 1;
} else {
vp9_reset_mb_tokens_context(xd);
}
}
if (xd->mode_info_context->mbmi.mb_skip_coeff)
continue; // only happens for SBs, which are already in dest buffer
#endif
vp9_dequantize_b_2x2(b);
IDCT_INVOKE(RTCD_VTABLE(idct), ihaar2)(&b->dqcoeff[0], b->diff, 8);
((int *)b->qcoeff)[0] = 0;// 2nd order block are set to 0 after inverse transform
((int *)b->qcoeff)[1] = 0;
((int *)b->qcoeff)[2] = 0;
((int *)b->qcoeff)[3] = 0;
((int *)b->qcoeff)[4] = 0;
((int *)b->qcoeff)[5] = 0;
((int *)b->qcoeff)[6] = 0;
((int *)b->qcoeff)[7] = 0;
#if CONFIG_SUPERBLOCKS
if (xd->mode_info_context->mbmi.encoded_as_sb) {
vp9_dequant_dc_idct_add_y_block_8x8_inplace_c(xd->qcoeff,
xd->block[0].dequant,
xd->dst.y_buffer + (n >> 1) * 16 * xd->dst.y_stride + (n & 1) * 16,
xd->dst.y_stride, xd->eobs, xd->block[24].diff, xd);
// do UV inline also
vp9_dequant_idct_add_uv_block_8x8_inplace_c(xd->qcoeff + 16 * 16,
xd->block[16].dequant,
xd->dst.u_buffer + (n >> 1) * 8 * xd->dst.uv_stride + (n & 1) * 8,
xd->dst.v_buffer + (n >> 1) * 8 * xd->dst.uv_stride + (n & 1) * 8,
xd->dst.uv_stride, xd->eobs + 16, xd);
} else
#endif
vp9_dequant_dc_idct_add_y_block_8x8(xd->qcoeff,
xd->block[0].dequant, xd->predictor, xd->dst.y_buffer,
xd->dst.y_stride, xd->eobs, xd->block[24].diff, xd);
#if CONFIG_SUPERBLOCKS
}
xd->mode_info_context = orig;
#endif
} else {
vp9_dequantize_b(b);
if (xd->eobs[24] > 1) {
IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh16)(&b->dqcoeff[0], b->diff);
((int *)b->qcoeff)[0] = 0;
((int *)b->qcoeff)[1] = 0;
((int *)b->qcoeff)[2] = 0;
((int *)b->qcoeff)[3] = 0;
((int *)b->qcoeff)[4] = 0;
((int *)b->qcoeff)[5] = 0;
((int *)b->qcoeff)[6] = 0;
((int *)b->qcoeff)[7] = 0;
} else {
IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh1)(&b->dqcoeff[0], b->diff);
((int *)b->qcoeff)[0] = 0;
}
pbi->dc_idct_add_y_block(xd->qcoeff, xd->block[0].dequant, xd->predictor,
xd->dst.y_buffer, xd->dst.y_stride, xd->eobs,
xd->block[24].diff);
}
}
#if CONFIG_SUPERBLOCKS
if (!xd->mode_info_context->mbmi.encoded_as_sb) {
#endif
if ((tx_size == TX_8X8 &&
xd->mode_info_context->mbmi.mode != I8X8_PRED &&
xd->mode_info_context->mbmi.mode != SPLITMV)
|| tx_size == TX_16X16
)
vp9_dequant_idct_add_uv_block_8x8
(xd->qcoeff + 16 * 16, xd->block[16].dequant,
xd->predictor + 16 * 16, xd->dst.u_buffer, xd->dst.v_buffer,
xd->dst.uv_stride, xd->eobs + 16, xd); //
else if (xd->mode_info_context->mbmi.mode != I8X8_PRED)
pbi->idct_add_uv_block(xd->qcoeff + 16 * 16, xd->block[16].dequant,
xd->predictor + 16 * 16, xd->dst.u_buffer, xd->dst.v_buffer,
xd->dst.uv_stride, xd->eobs + 16);
#if CONFIG_SUPERBLOCKS
}
#endif
}
static int get_delta_q(vp9_reader *bc, int prev, int *q_update) {
int ret_val = 0;
if (vp9_read_bit(bc)) {
ret_val = vp9_read_literal(bc, 4);
if (vp9_read_bit(bc))
ret_val = -ret_val;
}
/* Trigger a quantizer update if the delta-q value has changed */
if (ret_val != prev)
*q_update = 1;
return ret_val;
}
#ifdef PACKET_TESTING
#include <stdio.h>
FILE *vpxlog = 0;
#endif
/* Decode a row of Superblocks (2x2 region of MBs) */
static void
decode_sb_row(VP9D_COMP *pbi, VP9_COMMON *pc, int mbrow, MACROBLOCKD *xd,
BOOL_DECODER* const bc) {
int i;
int sb_col;
int mb_row, mb_col;
int recon_yoffset, recon_uvoffset;
int ref_fb_idx = pc->lst_fb_idx;
int dst_fb_idx = pc->new_fb_idx;
int recon_y_stride = pc->yv12_fb[ref_fb_idx].y_stride;
int recon_uv_stride = pc->yv12_fb[ref_fb_idx].uv_stride;
int row_delta[4] = { 0, +1, 0, -1};
int col_delta[4] = { +1, -1, +1, +1};
int sb_cols = (pc->mb_cols + 1) >> 1;
// For a SB there are 2 left contexts, each pertaining to a MB row within
vpx_memset(pc->left_context, 0, sizeof(pc->left_context));
mb_row = mbrow;
mb_col = 0;
for (sb_col = 0; sb_col < sb_cols; sb_col++) {
MODE_INFO *mi = xd->mode_info_context;
#if CONFIG_SUPERBLOCKS
mi->mbmi.encoded_as_sb = vp9_read(bc, pc->sb_coded);
#endif
// Process the 4 MBs within the SB in the order:
// top-left, top-right, bottom-left, bottom-right
for (i = 0; i < 4; i++) {
int dy = row_delta[i];
int dx = col_delta[i];
int offset_extended = dy * xd->mode_info_stride + dx;
xd->mb_index = i;
mi = xd->mode_info_context;
if ((mb_row >= pc->mb_rows) || (mb_col >= pc->mb_cols)) {
// MB lies outside frame, skip on to next
mb_row += dy;
mb_col += dx;
xd->mode_info_context += offset_extended;
xd->prev_mode_info_context += offset_extended;
continue;
}
// Set above context pointer
xd->above_context = pc->above_context + mb_col;
xd->left_context = pc->left_context + (i >> 1);
/* Distance of Mb to the various image edges.
* These are specified to 8th pel as they are always compared to
* values that are in 1/8th pel units
*/
xd->mb_to_top_edge = -((mb_row * 16)) << 3;
xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
xd->mb_to_left_edge = -((mb_col * 16) << 3);
xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
xd->up_available = (mb_row != 0);
xd->left_available = (mb_col != 0);
recon_yoffset = (mb_row * recon_y_stride * 16) + (mb_col * 16);
recon_uvoffset = (mb_row * recon_uv_stride * 8) + (mb_col * 8);
xd->dst.y_buffer = pc->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
xd->dst.u_buffer = pc->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
xd->dst.v_buffer = pc->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;
#if CONFIG_SUPERBLOCKS
if (i)
mi->mbmi.encoded_as_sb = 0;
#endif
vp9_decode_mb_mode_mv(pbi, xd, mb_row, mb_col, bc);
update_blockd_bmi(xd);
/* Select the appropriate reference frame for this MB */
if (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME)
ref_fb_idx = pc->lst_fb_idx;
else if (xd->mode_info_context->mbmi.ref_frame == GOLDEN_FRAME)
ref_fb_idx = pc->gld_fb_idx;
else
ref_fb_idx = pc->alt_fb_idx;
xd->pre.y_buffer = pc->yv12_fb[ref_fb_idx].y_buffer + recon_yoffset;
xd->pre.u_buffer = pc->yv12_fb[ref_fb_idx].u_buffer + recon_uvoffset;
xd->pre.v_buffer = pc->yv12_fb[ref_fb_idx].v_buffer + recon_uvoffset;
if (xd->mode_info_context->mbmi.second_ref_frame) {
int second_ref_fb_idx;
/* Select the appropriate reference frame for this MB */
if (xd->mode_info_context->mbmi.second_ref_frame == LAST_FRAME)
second_ref_fb_idx = pc->lst_fb_idx;
else if (xd->mode_info_context->mbmi.second_ref_frame ==
GOLDEN_FRAME)
second_ref_fb_idx = pc->gld_fb_idx;
else
second_ref_fb_idx = pc->alt_fb_idx;
xd->second_pre.y_buffer =
pc->yv12_fb[second_ref_fb_idx].y_buffer + recon_yoffset;
xd->second_pre.u_buffer =
pc->yv12_fb[second_ref_fb_idx].u_buffer + recon_uvoffset;
xd->second_pre.v_buffer =
pc->yv12_fb[second_ref_fb_idx].v_buffer + recon_uvoffset;
}
if (xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME) {
/* propagate errors from reference frames */
xd->corrupted |= pc->yv12_fb[ref_fb_idx].corrupted;
}
#if CONFIG_SUPERBLOCKS
if (xd->mode_info_context->mbmi.encoded_as_sb) {
if (mb_col < pc->mb_cols - 1)
mi[1] = mi[0];
if (mb_row < pc->mb_rows - 1) {
mi[pc->mode_info_stride] = mi[0];
if (mb_col < pc->mb_cols - 1)
mi[pc->mode_info_stride + 1] = mi[0];
}
}
#endif
vp9_intra_prediction_down_copy(xd);
decode_macroblock(pbi, xd, mb_row, mb_col, bc);
/* check if the boolean decoder has suffered an error */
xd->corrupted |= bool_error(bc);
#if CONFIG_SUPERBLOCKS
if (mi->mbmi.encoded_as_sb) {
assert(!i);
mb_col += 2;
xd->mode_info_context += 2;
xd->prev_mode_info_context += 2;
break;
}
#endif
// skip to next MB
xd->mode_info_context += offset_extended;
xd->prev_mode_info_context += offset_extended;
mb_row += dy;
mb_col += dx;
}
}
/* skip prediction column */
xd->mode_info_context += 1 - (pc->mb_cols & 0x1) + xd->mode_info_stride;
xd->prev_mode_info_context += 1 - (pc->mb_cols & 0x1) + xd->mode_info_stride;
}
static unsigned int read_partition_size(const unsigned char *cx_size) {
const unsigned int size =
cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
return size;
}
static int read_is_valid(const unsigned char *start,
size_t len,
const unsigned char *end) {
return (start + len > start && start + len <= end);
}
static void setup_token_decoder(VP9D_COMP *pbi,
const unsigned char *cx_data,
BOOL_DECODER* const bool_decoder) {
VP9_COMMON *pc = &pbi->common;
const unsigned char *user_data_end = pbi->Source + pbi->source_sz;
const unsigned char *partition;
ptrdiff_t partition_size;
ptrdiff_t bytes_left;
// Set up pointers to token partition
partition = cx_data;
bytes_left = user_data_end - partition;
partition_size = bytes_left;
/* Validate the calculated partition length. If the buffer
* described by the partition can't be fully read, then restrict
* it to the portion that can be (for EC mode) or throw an error.
*/
if (!read_is_valid(partition, partition_size, user_data_end)) {
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet or corrupt partition "
"%d length", 1);
}
if (vp9_start_decode(bool_decoder,
partition, (unsigned int)partition_size))
vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
"Failed to allocate bool decoder %d", 1);
}
static void init_frame(VP9D_COMP *pbi) {
VP9_COMMON *const pc = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
if (pc->frame_type == KEY_FRAME) {
/* Various keyframe initializations */
vp9_init_mv_probs(pc);
vp9_init_mbmode_probs(pc);
vp9_default_bmode_probs(pc->fc.bmode_prob);
vp9_default_coef_probs(pc);
vp9_kf_default_bmode_probs(pc->kf_bmode_prob);
// Reset the segment feature data to the default stats:
// Features disabled, 0, with delta coding (Default state).
vp9_clearall_segfeatures(xd);
xd->mb_segment_abs_delta = SEGMENT_DELTADATA;
/* reset the mode ref deltasa for loop filter */
vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
/* All buffers are implicitly updated on key frames. */
pc->refresh_golden_frame = 1;
pc->refresh_alt_ref_frame = 1;
pc->copy_buffer_to_gf = 0;
pc->copy_buffer_to_arf = 0;
/* Note that Golden and Altref modes cannot be used on a key frame so
* ref_frame_sign_bias[] is undefined and meaningless
*/
pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0;
pc->ref_frame_sign_bias[ALTREF_FRAME] = 0;
vp9_init_mode_contexts(&pbi->common);
vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
vpx_memcpy(&pc->lfc_a, &pc->fc, sizeof(pc->fc));
vpx_memcpy(pbi->common.fc.vp8_mode_contexts,
pbi->common.fc.mode_context,
sizeof(pbi->common.fc.mode_context));
vpx_memset(pc->prev_mip, 0,
(pc->mb_cols + 1) * (pc->mb_rows + 1)* sizeof(MODE_INFO));
vpx_memset(pc->mip, 0,
(pc->mb_cols + 1) * (pc->mb_rows + 1)* sizeof(MODE_INFO));
vp9_update_mode_info_border(pc, pc->mip);
vp9_update_mode_info_in_image(pc, pc->mi);
} else {
if (!pc->use_bilinear_mc_filter)
pc->mcomp_filter_type = EIGHTTAP;
else
pc->mcomp_filter_type = BILINEAR;
/* To enable choice of different interpolation filters */
vp9_setup_interp_filters(xd, pc->mcomp_filter_type, pc);
}
xd->mode_info_context = pc->mi;
xd->prev_mode_info_context = pc->prev_mi;
xd->frame_type = pc->frame_type;
xd->mode_info_context->mbmi.mode = DC_PRED;
xd->mode_info_stride = pc->mode_info_stride;
xd->corrupted = 0; /* init without corruption */
xd->fullpixel_mask = 0xffffffff;
if (pc->full_pixel)
xd->fullpixel_mask = 0xfffffff8;
}
#if 0
static void read_coef_probs2(VP9D_COMP *pbi) {
const vp9_prob grpupd = 192;
int i, j, k, l;
vp9_reader *const bc = &pbi->bc;
VP9_COMMON *const pc = &pbi->common;
for (l = 0; l < ENTROPY_NODES; l++) {
if (vp9_read(bc, grpupd)) {
// printf("Decoding %d\n", l);
for (i = 0; i < BLOCK_TYPES; i++)
for (j = !i; j < COEF_BANDS; j++)
for (k = 0; k < PREV_COEF_CONTEXTS; k++) {
if (k >= 3 && ((i == 0 && j == 1) ||
(i > 0 && j == 0)))
continue;
{
vp9_prob *const p = pc->fc.coef_probs [i][j][k] + l;
int u = vp9_read(bc, COEF_UPDATE_PROB);
if (u) *p = read_prob_diff_update(bc, *p);
}
}
}
}
if (pbi->common.txfm_mode == ALLOW_8X8) {
for (l = 0; l < ENTROPY_NODES; l++) {
if (vp9_read(bc, grpupd)) {
for (i = 0; i < BLOCK_TYPES_8X8; i++)
for (j = !i; j < COEF_BANDS; j++)
for (k = 0; k < PREV_COEF_CONTEXTS; k++) {
if (k >= 3 && ((i == 0 && j == 1) ||
(i > 0 && j == 0)))
continue;
{
vp9_prob *const p = pc->fc.coef_probs_8x8 [i][j][k] + l;
int u = vp9_read(bc, COEF_UPDATE_PROB_8X8);
if (u) *p = read_prob_diff_update(bc, *p);
}
}
}
}
}
}
#endif
static void read_coef_probs_common(
BOOL_DECODER* const bc,
vp9_prob coef_probs[BLOCK_TYPES][COEF_BANDS]
[PREV_COEF_CONTEXTS][ENTROPY_NODES]) {
int i, j, k, l;
if (vp9_read_bit(bc)) {
for (i = 0; i < BLOCK_TYPES; i++) {
for (j = !i; j < COEF_BANDS; j++) {
/* NB: This j loop starts from 1 on block type i == 0 */
for (k = 0; k < PREV_COEF_CONTEXTS; k++) {
if (k >= 3 && ((i == 0 && j == 1) ||
(i > 0 && j == 0)))
continue;
for (l = 0; l < ENTROPY_NODES; l++) {
vp9_prob *const p = coef_probs[i][j][k] + l;
if (vp9_read(bc, COEF_UPDATE_PROB)) {
*p = read_prob_diff_update(bc, *p);
}
}
}
}
}
}
}
static void read_coef_probs(VP9D_COMP *pbi, BOOL_DECODER* const bc) {
VP9_COMMON *const pc = &pbi->common;
read_coef_probs_common(bc, pc->fc.coef_probs);
read_coef_probs_common(bc, pc->fc.hybrid_coef_probs);
if (pbi->common.txfm_mode != ONLY_4X4) {
read_coef_probs_common(bc, pc->fc.coef_probs_8x8);
read_coef_probs_common(bc, pc->fc.hybrid_coef_probs_8x8);
}
if (pbi->common.txfm_mode > ALLOW_8X8) {
read_coef_probs_common(bc, pc->fc.coef_probs_16x16);
read_coef_probs_common(bc, pc->fc.hybrid_coef_probs_16x16);
}
}
int vp9_decode_frame(VP9D_COMP *pbi) {
BOOL_DECODER header_bc, residual_bc;
VP9_COMMON *const pc = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
const unsigned char *data = (const unsigned char *)pbi->Source;
const unsigned char *data_end = data + pbi->source_sz;
ptrdiff_t first_partition_length_in_bytes = 0;
int mb_row;
int i, j;
int corrupt_tokens = 0;
/* start with no corruption of current frame */
xd->corrupted = 0;
pc->yv12_fb[pc->new_fb_idx].corrupted = 0;
if (data_end - data < 3) {
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet");
} else {
pc->last_frame_type = pc->frame_type;
pc->frame_type = (FRAME_TYPE)(data[0] & 1);
pc->version = (data[0] >> 1) & 7;
pc->show_frame = (data[0] >> 4) & 1;
first_partition_length_in_bytes =
(data[0] | (data[1] << 8) | (data[2] << 16)) >> 5;
if ((data + first_partition_length_in_bytes > data_end
|| data + first_partition_length_in_bytes < data))
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet or corrupt partition 0 length");
data += 3;
vp9_setup_version(pc);
if (pc->frame_type == KEY_FRAME) {
const int Width = pc->Width;
const int Height = pc->Height;
/* vet via sync code */
/* When error concealment is enabled we should only check the sync
* code if we have enough bits available
*/
if (data + 3 < data_end) {
if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a)
vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM,
"Invalid frame sync code");
}
/* If error concealment is enabled we should only parse the new size
* if we have enough data. Otherwise we will end up with the wrong
* size.
*/
if (data + 6 < data_end) {
pc->Width = (data[3] | (data[4] << 8)) & 0x3fff;
pc->horiz_scale = data[4] >> 6;
pc->Height = (data[5] | (data[6] << 8)) & 0x3fff;
pc->vert_scale = data[6] >> 6;
}
data += 7;
if (Width != pc->Width || Height != pc->Height) {
if (pc->Width <= 0) {
pc->Width = Width;
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Invalid frame width");
}
if (pc->Height <= 0) {
pc->Height = Height;
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Invalid frame height");
}
if (vp9_alloc_frame_buffers(pc, pc->Width, pc->Height))
vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
"Failed to allocate frame buffers");
}
}
}
if ((!pbi->decoded_key_frame && pc->frame_type != KEY_FRAME) ||
pc->Width == 0 || pc->Height == 0) {
return -1;
}
init_frame(pbi);
if (vp9_start_decode(&header_bc, data,
(unsigned int)first_partition_length_in_bytes))
vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
"Failed to allocate bool decoder 0");
if (pc->frame_type == KEY_FRAME) {
pc->clr_type = (YUV_TYPE)vp9_read_bit(&header_bc);
pc->clamp_type = (CLAMP_TYPE)vp9_read_bit(&header_bc);
}
/* Is segmentation enabled */
xd->segmentation_enabled = (unsigned char)vp9_read_bit(&header_bc);
if (xd->segmentation_enabled) {
// Read whether or not the segmentation map is being explicitly
// updated this frame.
xd->update_mb_segmentation_map = (unsigned char)vp9_read_bit(&header_bc);
// If so what method will be used.
if (xd->update_mb_segmentation_map) {
// Which macro block level features are enabled
// Read the probs used to decode the segment id for each macro
// block.
for (i = 0; i < MB_FEATURE_TREE_PROBS; i++) {
xd->mb_segment_tree_probs[i] = vp9_read_bit(&header_bc) ?
(vp9_prob)vp9_read_literal(&header_bc, 8) : 255;
}
// Read the prediction probs needed to decode the segment id
pc->temporal_update = (unsigned char)vp9_read_bit(&header_bc);
for (i = 0; i < PREDICTION_PROBS; i++) {
if (pc->temporal_update) {
pc->segment_pred_probs[i] = vp9_read_bit(&header_bc) ?
(vp9_prob)vp9_read_literal(&header_bc, 8) : 255;
} else {
pc->segment_pred_probs[i] = 255;
}
}
}
// Is the segment data being updated
xd->update_mb_segmentation_data = (unsigned char)vp9_read_bit(&header_bc);
if (xd->update_mb_segmentation_data) {
int data;
xd->mb_segment_abs_delta = (unsigned char)vp9_read_bit(&header_bc);
vp9_clearall_segfeatures(xd);
// For each segmentation...
for (i = 0; i < MAX_MB_SEGMENTS; i++) {
// For each of the segments features...
for (j = 0; j < SEG_LVL_MAX; j++) {
// Is the feature enabled
if (vp9_read_bit(&header_bc)) {
// Update the feature data and mask
vp9_enable_segfeature(xd, i, j);
data = (signed char)vp9_read_literal(
&header_bc, vp9_seg_feature_data_bits(j));
// Is the segment data signed..
if (vp9_is_segfeature_signed(j)) {
if (vp9_read_bit(&header_bc))
data = - data;
}
} else
data = 0;
vp9_set_segdata(xd, i, j, data);
}
}
}
}
// Read common prediction model status flag probability updates for the
// reference frame
if (pc->frame_type == KEY_FRAME) {
// Set the prediction probabilities to defaults
pc->ref_pred_probs[0] = 120;
pc->ref_pred_probs[1] = 80;
pc->ref_pred_probs[2] = 40;
} else {
for (i = 0; i < PREDICTION_PROBS; i++) {
if (vp9_read_bit(&header_bc))
pc->ref_pred_probs[i] = (vp9_prob)vp9_read_literal(&header_bc, 8);
}
}
#if CONFIG_SUPERBLOCKS
pc->sb_coded = vp9_read_literal(&header_bc, 8);
#endif
/* Read the loop filter level and type */
pc->txfm_mode = vp9_read_literal(&header_bc, 2);
if (pc->txfm_mode == TX_MODE_SELECT) {
pc->prob_tx[0] = vp9_read_literal(&header_bc, 8);
pc->prob_tx[1] = vp9_read_literal(&header_bc, 8);
}
pc->filter_type = (LOOPFILTERTYPE) vp9_read_bit(&header_bc);
pc->filter_level = vp9_read_literal(&header_bc, 6);
pc->sharpness_level = vp9_read_literal(&header_bc, 3);
/* Read in loop filter deltas applied at the MB level based on mode or ref frame. */
xd->mode_ref_lf_delta_update = 0;
xd->mode_ref_lf_delta_enabled = (unsigned char)vp9_read_bit(&header_bc);
if (xd->mode_ref_lf_delta_enabled) {
/* Do the deltas need to be updated */
xd->mode_ref_lf_delta_update = (unsigned char)vp9_read_bit(&header_bc);
if (xd->mode_ref_lf_delta_update) {
/* Send update */
for (i = 0; i < MAX_REF_LF_DELTAS; i++) {
if (vp9_read_bit(&header_bc)) {
/*sign = vp9_read_bit( &header_bc );*/
xd->ref_lf_deltas[i] = (signed char)vp9_read_literal(&header_bc, 6);
if (vp9_read_bit(&header_bc)) /* Apply sign */
xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1;
}
}
/* Send update */
for (i = 0; i < MAX_MODE_LF_DELTAS; i++) {
if (vp9_read_bit(&header_bc)) {
/*sign = vp9_read_bit( &header_bc );*/
xd->mode_lf_deltas[i] = (signed char)vp9_read_literal(&header_bc, 6);
if (vp9_read_bit(&header_bc)) /* Apply sign */
xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1;
}
}
}
}
// Dummy read for now
vp9_read_literal(&header_bc, 2);
setup_token_decoder(pbi, data + first_partition_length_in_bytes,
&residual_bc);
/* Read the default quantizers. */
{
int Q, q_update;
Q = vp9_read_literal(&header_bc, QINDEX_BITS);
pc->base_qindex = Q;
q_update = 0;
/* AC 1st order Q = default */
pc->y1dc_delta_q = get_delta_q(&header_bc, pc->y1dc_delta_q, &q_update);
pc->y2dc_delta_q = get_delta_q(&header_bc, pc->y2dc_delta_q, &q_update);
pc->y2ac_delta_q = get_delta_q(&header_bc, pc->y2ac_delta_q, &q_update);
pc->uvdc_delta_q = get_delta_q(&header_bc, pc->uvdc_delta_q, &q_update);
pc->uvac_delta_q = get_delta_q(&header_bc, pc->uvac_delta_q, &q_update);
if (q_update)
vp9_init_de_quantizer(pbi);
/* MB level dequantizer setup */
mb_init_dequantizer(pbi, &pbi->mb);
}
/* Determine if the golden frame or ARF buffer should be updated and how.
* For all non key frames the GF and ARF refresh flags and sign bias
* flags must be set explicitly.
*/
if (pc->frame_type != KEY_FRAME) {
/* Should the GF or ARF be updated from the current frame */
pc->refresh_golden_frame = vp9_read_bit(&header_bc);
pc->refresh_alt_ref_frame = vp9_read_bit(&header_bc);
if (pc->refresh_alt_ref_frame) {
vpx_memcpy(&pc->fc, &pc->lfc_a, sizeof(pc->fc));
vpx_memcpy(pc->fc.vp8_mode_contexts,
pc->fc.mode_context_a,
sizeof(pc->fc.vp8_mode_contexts));
} else {
vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
vpx_memcpy(pc->fc.vp8_mode_contexts,
pc->fc.mode_context,
sizeof(pc->fc.vp8_mode_contexts));
}
/* Buffer to buffer copy flags. */
pc->copy_buffer_to_gf = 0;
if (!pc->refresh_golden_frame)
pc->copy_buffer_to_gf = vp9_read_literal(&header_bc, 2);
pc->copy_buffer_to_arf = 0;
if (!pc->refresh_alt_ref_frame)
pc->copy_buffer_to_arf = vp9_read_literal(&header_bc, 2);
pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp9_read_bit(&header_bc);
pc->ref_frame_sign_bias[ALTREF_FRAME] = vp9_read_bit(&header_bc);
/* Is high precision mv allowed */
xd->allow_high_precision_mv = (unsigned char)vp9_read_bit(&header_bc);
// Read the type of subpel filter to use
if (vp9_read_bit(&header_bc)) {
pc->mcomp_filter_type = SWITCHABLE;
} else {
pc->mcomp_filter_type = vp9_read_literal(&header_bc, 2);
}
/* To enable choice of different interploation filters */
vp9_setup_interp_filters(xd, pc->mcomp_filter_type, pc);
}
pc->refresh_entropy_probs = vp9_read_bit(&header_bc);
if (pc->refresh_entropy_probs == 0) {
vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
}
pc->refresh_last_frame = (pc->frame_type == KEY_FRAME)
|| vp9_read_bit(&header_bc);
if (0) {
FILE *z = fopen("decodestats.stt", "a");
fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n",
pc->current_video_frame,
pc->frame_type,
pc->refresh_golden_frame,
pc->refresh_alt_ref_frame,
pc->refresh_last_frame,
pc->base_qindex);
fclose(z);
}
vp9_copy(pbi->common.fc.pre_coef_probs,
pbi->common.fc.coef_probs);
vp9_copy(pbi->common.fc.pre_hybrid_coef_probs,
pbi->common.fc.hybrid_coef_probs);
vp9_copy(pbi->common.fc.pre_coef_probs_8x8,
pbi->common.fc.coef_probs_8x8);
vp9_copy(pbi->common.fc.pre_hybrid_coef_probs_8x8,
pbi->common.fc.hybrid_coef_probs_8x8);
vp9_copy(pbi->common.fc.pre_coef_probs_16x16,
pbi->common.fc.coef_probs_16x16);
vp9_copy(pbi->common.fc.pre_hybrid_coef_probs_16x16,
pbi->common.fc.hybrid_coef_probs_16x16);
vp9_copy(pbi->common.fc.pre_ymode_prob, pbi->common.fc.ymode_prob);
vp9_copy(pbi->common.fc.pre_uv_mode_prob, pbi->common.fc.uv_mode_prob);
vp9_copy(pbi->common.fc.pre_bmode_prob, pbi->common.fc.bmode_prob);
vp9_copy(pbi->common.fc.pre_i8x8_mode_prob, pbi->common.fc.i8x8_mode_prob);
vp9_copy(pbi->common.fc.pre_sub_mv_ref_prob, pbi->common.fc.sub_mv_ref_prob);
vp9_copy(pbi->common.fc.pre_mbsplit_prob, pbi->common.fc.mbsplit_prob);
pbi->common.fc.pre_nmvc = pbi->common.fc.nmvc;
vp9_zero(pbi->common.fc.coef_counts);
vp9_zero(pbi->common.fc.hybrid_coef_counts);
vp9_zero(pbi->common.fc.coef_counts_8x8);
vp9_zero(pbi->common.fc.hybrid_coef_counts_8x8);
vp9_zero(pbi->common.fc.coef_counts_16x16);
vp9_zero(pbi->common.fc.hybrid_coef_counts_16x16);
vp9_zero(pbi->common.fc.ymode_counts);
vp9_zero(pbi->common.fc.uv_mode_counts);
vp9_zero(pbi->common.fc.bmode_counts);
vp9_zero(pbi->common.fc.i8x8_mode_counts);
vp9_zero(pbi->common.fc.sub_mv_ref_counts);
vp9_zero(pbi->common.fc.mbsplit_counts);
vp9_zero(pbi->common.fc.NMVcount);
vp9_zero(pbi->common.fc.mv_ref_ct);
vp9_zero(pbi->common.fc.mv_ref_ct_a);
read_coef_probs(pbi, &header_bc);
vpx_memcpy(&xd->pre, &pc->yv12_fb[pc->lst_fb_idx], sizeof(YV12_BUFFER_CONFIG));
vpx_memcpy(&xd->dst, &pc->yv12_fb[pc->new_fb_idx], sizeof(YV12_BUFFER_CONFIG));
// Create the segmentation map structure and set to 0
if (!pc->last_frame_seg_map)
CHECK_MEM_ERROR(pc->last_frame_seg_map,
vpx_calloc((pc->mb_rows * pc->mb_cols), 1));
/* set up frame new frame for intra coded blocks */
vp9_setup_intra_recon(&pc->yv12_fb[pc->new_fb_idx]);
vp9_setup_block_dptrs(xd);
vp9_build_block_doffsets(xd);
/* clear out the coeff buffer */
vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
/* Read the mb_no_coeff_skip flag */
pc->mb_no_coeff_skip = (int)vp9_read_bit(&header_bc);
vp9_decode_mode_mvs_init(pbi, &header_bc);
vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols);
// Resset the macroblock mode info context to the start of the list
xd->mode_info_context = pc->mi;
xd->prev_mode_info_context = pc->prev_mi;
/* Decode a row of superblocks */
for (mb_row = 0; mb_row < pc->mb_rows; mb_row += 2) {
decode_sb_row(pbi, pc, mb_row, xd, &residual_bc);
}
corrupt_tokens |= xd->corrupted;
/* Collect information about decoder corruption. */
/* 1. Check first boolean decoder for errors. */
pc->yv12_fb[pc->new_fb_idx].corrupted = bool_error(&header_bc);
/* 2. Check the macroblock information */
pc->yv12_fb[pc->new_fb_idx].corrupted |= corrupt_tokens;
if (!pbi->decoded_key_frame) {
if (pc->frame_type == KEY_FRAME &&
!pc->yv12_fb[pc->new_fb_idx].corrupted)
pbi->decoded_key_frame = 1;
else
vpx_internal_error(&pbi->common.error, VPX_CODEC_CORRUPT_FRAME,
"A stream must start with a complete key frame");
}
vp9_adapt_coef_probs(pc);
if (pc->frame_type != KEY_FRAME) {
vp9_adapt_mode_probs(pc);
vp9_adapt_nmv_probs(pc, xd->allow_high_precision_mv);
vp9_update_mode_context(&pbi->common);
}
/* If this was a kf or Gf note the Q used */
if ((pc->frame_type == KEY_FRAME) ||
pc->refresh_golden_frame || pc->refresh_alt_ref_frame) {
pc->last_kf_gf_q = pc->base_qindex;
}
if (pc->refresh_entropy_probs) {
if (pc->refresh_alt_ref_frame)
vpx_memcpy(&pc->lfc_a, &pc->fc, sizeof(pc->fc));
else
vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
}
#ifdef PACKET_TESTING
{
FILE *f = fopen("decompressor.VP8", "ab");
unsigned int size = residual_bc.pos + header_bc.pos + 8;
fwrite((void *) &size, 4, 1, f);
fwrite((void *) pbi->Source, size, 1, f);
fclose(f);
}
#endif
// printf("Frame %d Done\n", frame_count++);
return 0;
}
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