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-rw-r--r--vp9/decoder/vp9_decodframe.c1462
1 files changed, 1462 insertions, 0 deletions
diff --git a/vp9/decoder/vp9_decodframe.c b/vp9/decoder/vp9_decodframe.c
new file mode 100644
index 000000000..c08332351
--- /dev/null
+++ b/vp9/decoder/vp9_decodframe.c
@@ -0,0 +1,1462 @@
+/*
+ * 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 "vp9_onyxd_int.h"
+#include "vp9/common/vp9_header.h"
+#include "vp9/common/vp9_reconintra.h"
+#include "vp9/common/vp9_reconintra4x4.h"
+#include "vp9/common/vp9_reconinter.h"
+#include "vp9/decoder/vp9_decodframe.h"
+#include "vp9_detokenize.h"
+#include "vp9/common/vp9_invtrans.h"
+#include "vp9/common/vp9_alloccommon.h"
+#include "vp9/common/vp9_entropymode.h"
+#include "vp9/common/vp9_quant_common.h"
+#include "vpx_scale/vpxscale.h"
+#include "vp9/common/vp9_setupintrarecon.h"
+
+#include "vp9_decodemv.h"
+#include "vp9/common/vp9_extend.h"
+#include "vp9/common/vp9_modecont.h"
+#include "vpx_mem/vpx_mem.h"
+#include "vp9_dboolhuff.h"
+
+#include "vp9/common/vp9_seg_common.h"
+#include "vp9/common/vp9_entropy.h"
+#include "vp9_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->mb.inv_xform4x4_1_x8 = vp9_short_inv_walsh4x4_1_x8;
+ pbi->mb.inv_xform4x4_x8 = vp9_short_inv_walsh4x4_x8;
+ pbi->mb.inv_walsh4x4_1 = vp9_short_inv_walsh4x4_1_lossless;
+ pbi->mb.inv_walsh4x4_lossless = vp9_short_inv_walsh4x4_lossless;
+ 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->mb.inv_xform4x4_1_x8 = vp9_short_idct4x4llm_1;
+ pbi->mb.inv_xform4x4_x8 = vp9_short_idct4x4llm;
+ pbi->mb.inv_walsh4x4_1 = vp9_short_inv_walsh4x4_1;
+ pbi->mb.inv_walsh4x4_lossless = vp9_short_inv_walsh4x4;
+ 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->mb.inv_xform4x4_1_x8 = vp9_short_idct4x4llm_1;
+ pbi->mb.inv_xform4x4_x8 = vp9_short_idct4x4llm;
+ pbi->mb.inv_walsh4x4_1 = vp9_short_inv_walsh4x4_1;
+ pbi->mb.inv_walsh4x4_lossless = vp9_short_inv_walsh4x4;
+ 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 > 0) {
+ 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_COMP_INTERINTRA_PRED
+ else if (xd->mode_info_context->mbmi.second_ref_frame == INTRA_FRAME) {
+ vp9_build_interintra_16x16_predictors_mb(xd,
+ xd->dst.y_buffer,
+ xd->dst.u_buffer,
+ xd->dst.v_buffer,
+ xd->dst.y_stride,
+ xd->dst.uv_stride);
+ }
+#endif
+#if CONFIG_SUPERBLOCKS
+ }
+#endif
+ }
+}
+
+#if CONFIG_SUPERBLOCKS
+static void decode_superblock(VP9D_COMP *pbi, MACROBLOCKD *xd,
+ int mb_row, unsigned int mb_col,
+ BOOL_DECODER* const bc) {
+ int i, n, eobtotal;
+ TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
+ VP9_COMMON *const pc = &pbi->common;
+ MODE_INFO *orig_mi = xd->mode_info_context;
+
+ assert(xd->mode_info_context->mbmi.encoded_as_sb);
+
+ // re-initialize macroblock dequantizer before detokenization
+ if (xd->segmentation_enabled)
+ mb_init_dequantizer(pbi, xd);
+
+ if (pbi->common.frame_type != KEY_FRAME)
+ vp9_setup_interp_filters(xd, xd->mode_info_context->mbmi.interp_filter, pc);
+
+ if (xd->mode_info_context->mbmi.mb_skip_coeff) {
+ 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++;
+ 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--;
+
+ /* Special case: Force the loopfilter to skip when eobtotal and
+ * mb_skip_coeff are zero.
+ */
+ skip_recon_mb(pbi, xd);
+ return;
+ }
+
+ /* do prediction */
+ if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
+ vp9_build_intra_predictors_sby_s(xd);
+ vp9_build_intra_predictors_sbuv_s(xd);
+ } else {
+ 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);
+ }
+
+ /* dequantization and idct */
+ for (n = 0; n < 4; n++) {
+ BLOCKD *b = &xd->block[24];
+ int x_idx = n & 1, y_idx = n >> 1;
+
+ if (mb_col + x_idx >= pc->mb_cols || mb_row + y_idx >= pc->mb_rows)
+ continue;
+
+ xd->above_context = pc->above_context + mb_col + x_idx;
+ xd->left_context = pc->left_context + y_idx;
+ xd->mode_info_context = orig_mi + x_idx + y_idx * pc->mode_info_stride;
+ for (i = 0; i < 25; i++) {
+ xd->block[i].eob = 0;
+ xd->eobs[i] = 0;
+ }
+
+ eobtotal = vp9_decode_mb_tokens(pbi, xd, bc);
+ if (eobtotal == 0) { // skip loopfilter
+ xd->mode_info_context->mbmi.mb_skip_coeff = 1;
+ continue;
+ }
+
+ if (tx_size == TX_16X16) {
+ vp9_dequant_idct_add_16x16(xd->qcoeff, xd->block[0].dequant,
+ xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
+ xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
+ xd->dst.y_stride, xd->dst.y_stride, xd->eobs[0]);
+ vp9_dequant_idct_add_uv_block_8x8_inplace_c(xd->qcoeff + 16 * 16,
+ xd->block[16].dequant,
+ xd->dst.u_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
+ xd->dst.v_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
+ xd->dst.uv_stride, xd->eobs + 16, xd);
+ } else if (tx_size == TX_8X8) {
+ vp9_dequantize_b_2x2(b);
+ vp9_short_ihaar2x2(&b->dqcoeff[0], b->diff, 8);
+ ((int *)b->qcoeff)[0] = 0; // 2nd order block are set to 0 after idct
+ ((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;
+ vp9_dequant_dc_idct_add_y_block_8x8_inplace_c(xd->qcoeff,
+ xd->block[0].dequant,
+ xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
+ xd->dst.y_stride, xd->eobs, xd->block[24].diff, xd);
+ vp9_dequant_idct_add_uv_block_8x8_inplace_c(xd->qcoeff + 16 * 16,
+ xd->block[16].dequant,
+ xd->dst.u_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
+ xd->dst.v_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
+ xd->dst.uv_stride, xd->eobs + 16, xd);
+ } else {
+ vp9_dequantize_b(b);
+ if (xd->eobs[24] > 1) {
+ vp9_short_inv_walsh4x4(&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 {
+ xd->inv_walsh4x4_1(&b->dqcoeff[0], b->diff);
+ ((int *)b->qcoeff)[0] = 0;
+ }
+
+ vp9_dequant_dc_idct_add_y_block_4x4_inplace_c(xd->qcoeff,
+ xd->block[0].dequant,
+ xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
+ xd->dst.y_stride, xd->eobs, xd->block[24].diff, xd);
+ vp9_dequant_idct_add_uv_block_4x4_inplace_c(xd->qcoeff + 16 * 16,
+ xd->block[16].dequant,
+ xd->dst.u_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
+ xd->dst.v_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
+ xd->dst.uv_stride, xd->eobs + 16, xd);
+ }
+ }
+
+ xd->above_context = pc->above_context + mb_col;
+ xd->left_context = pc->left_context;
+ xd->mode_info_context = orig_mi;
+}
+#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;
+
+#if CONFIG_SUPERBLOCKS
+ assert(!xd->mode_info_context->mbmi.encoded_as_sb);
+#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);
+ } else if (!bool_error(bc)) {
+ for (i = 0; i < 25; i++) {
+ xd->block[i].eob = 0;
+ xd->eobs[i] = 0;
+ }
+ if (mode != B_PRED) {
+ 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;
+ 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 (mode != I8X8_PRED) {
+ vp9_build_intra_predictors_mbuv(xd);
+ if (mode != B_PRED) {
+ vp9_build_intra_predictors_mby(xd);
+ }
+ }
+ } else {
+ 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, 0,
+ xd->eobs[idx]);
+ }
+ 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++) {
+ int b_mode;
+#if CONFIG_COMP_INTRA_PRED
+ int b_mode2;
+#endif
+ BLOCKD *b = &xd->block[i];
+ b_mode = xd->mode_info_context->bmi[i].as_mode.first;
+#if CONFIG_NEWBINTRAMODES
+ xd->mode_info_context->bmi[i].as_mode.context = b->bmi.as_mode.context =
+ vp9_find_bpred_context(b);
+#endif
+ if (!xd->mode_info_context->mbmi.mb_skip_coeff)
+ eobtotal += vp9_decode_coefs_4x4(pbi, xd, bc, PLANE_TYPE_Y_WITH_DC, i);
+#if CONFIG_COMP_INTRA_PRED
+ 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);
+ }
+ }
+ if (!xd->mode_info_context->mbmi.mb_skip_coeff)
+ vp9_decode_mb_tokens_4x4_uv(pbi, xd, bc);
+ } 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, xd->eobs[0]);
+ }
+ } else if (tx_size == TX_8X8) {
+ vp9_dequantize_b_2x2(b);
+ vp9_short_ihaar2x2(&b->dqcoeff[0], b->diff, 8);
+ ((int *)b->qcoeff)[0] = 0; // 2nd order block are set to 0 after idct
+ ((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;
+ 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);
+ } else {
+ vp9_dequantize_b(b);
+ if (xd->eobs[24] > 1) {
+ vp9_short_inv_walsh4x4(&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 {
+ xd->inv_walsh4x4_1(&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 ((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);
+}
+
+
+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;
+ }
+#if CONFIG_SUPERBLOCKS
+ if (i)
+ mi->mbmi.encoded_as_sb = 0;
+#endif
+
+ // 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_left_edge = -((mb_col * 16) << 3);
+#if CONFIG_SUPERBLOCKS
+ if (mi->mbmi.encoded_as_sb) {
+ xd->mb_to_bottom_edge = ((pc->mb_rows - 2 - mb_row) * 16) << 3;
+ xd->mb_to_right_edge = ((pc->mb_cols - 2 - mb_col) * 16) << 3;
+ } else {
+#endif
+ xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
+ xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
+#if CONFIG_SUPERBLOCKS
+ }
+#endif
+
+ 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;
+
+ 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 > 0) {
+ 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];
+ }
+ }
+ if (xd->mode_info_context->mbmi.encoded_as_sb) {
+ decode_superblock(pbi, xd, mb_row, mb_col, bc);
+ } else {
+#endif
+ vp9_intra_prediction_down_copy(xd);
+ decode_macroblock(pbi, xd, mb_row, mb_col, bc);
+#if CONFIG_SUPERBLOCKS
+ }
+#endif
+
+ /* 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.vp9_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, const unsigned char **p_data_end) {
+ 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.vp9_mode_contexts,
+ pc->fc.mode_context_a,
+ sizeof(pc->fc.vp9_mode_contexts));
+ } else {
+ vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
+ vpx_memcpy(pc->fc.vp9_mode_contexts,
+ pc->fc.mode_context,
+ sizeof(pc->fc.vp9_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);
+ }
+#if CONFIG_COMP_INTERINTRA_PRED
+ pc->use_interintra = vp9_read_bit(&header_bc);
+#endif
+ /* 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);
+
+ // Read inter mode probability context updates
+ if (pc->frame_type != KEY_FRAME) {
+ int i, j;
+ for (i = 0; i < INTER_MODE_CONTEXTS; i++) {
+ for (j = 0; j < 4; j++) {
+ if (vp9_read(&header_bc, 252)) {
+ pc->fc.vp9_mode_contexts[i][j] =
+ (vp9_prob)vp9_read_literal(&header_bc, 8);
+ }
+ }
+ }
+ }
+
+ 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);
+#if CONFIG_SUPERBLOCKS
+ vp9_copy(pbi->common.fc.pre_sb_ymode_prob, pbi->common.fc.sb_ymode_prob);
+#endif
+ 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);
+#if CONFIG_COMP_INTERINTRA_PRED
+ pbi->common.fc.pre_interintra_prob = pbi->common.fc.interintra_prob;
+#endif
+ 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);
+#if CONFIG_SUPERBLOCKS
+ vp9_zero(pbi->common.fc.sb_ymode_counts);
+#endif
+ 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);
+#if CONFIG_COMP_INTERINTRA_PRED
+ vp9_zero(pbi->common.fc.interintra_counts);
+#endif
+
+ 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++);
+
+ /* Find the end of the coded buffer */
+ while (residual_bc.count > CHAR_BIT
+ && residual_bc.count < VP9_BD_VALUE_SIZE) {
+ residual_bc.count -= CHAR_BIT;
+ residual_bc.user_buffer--;
+ }
+ *p_data_end = residual_bc.user_buffer;
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-09 19:32:55 +0000