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Merge "Adding functions with common code for superblock decoding." into experimental

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This commit is contained in:
John Koleszar 2013-04-02 20:18:13 -07:00 committed by Gerrit Code Review
commit f677b13fb4
1 changed files with 163 additions and 195 deletions
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336
vp9/decoder/vp9_decodframe.c
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@ -219,7 +219,7 @@ static void skip_recon_mb(VP9D_COMP *pbi, MACROBLOCKD *xd,
static void decode_16x16(VP9D_COMP *pbi, MACROBLOCKD *xd,
BOOL_DECODER* const bc) {
TX_TYPE tx_type = get_tx_type_16x16(xd, 0);
const TX_TYPE tx_type = get_tx_type_16x16(xd, 0);
#if 0 // def DEC_DEBUG
if (dec_debug) {
int i;
@ -479,8 +479,116 @@ static void decode_4x4(VP9D_COMP *pbi, MACROBLOCKD *xd,
}
}
static void decode_superblock64(VP9D_COMP *pbi, MACROBLOCKD *xd,
int mb_row, int mb_col,
static INLINE void decode_sb_8x8(MACROBLOCKD *mb, int y_size) {
const int y_count = y_size * y_size;
const int uv_size = y_size / 2;
const int uv_count = uv_size * uv_size;
const int u_qcoeff_offset = 64 * y_count;
const int v_qcoeff_offset = u_qcoeff_offset + 64 * uv_count;
const int u_eob_offset = 4 * y_count;
const int v_eob_offset = u_eob_offset + 4 * uv_count;
int n;
// luma
for (n = 0; n < y_count; n++) {
const int x_idx = n % y_size;
const int y_idx = n / y_size;
const int y_offset = (y_idx * 8) * mb->dst.y_stride + (x_idx * 8);
const TX_TYPE tx_type = get_tx_type_8x8(mb,
(y_idx * 2 * y_size + x_idx) * 2);
if (tx_type == DCT_DCT) {
vp9_dequant_idct_add_8x8_c(mb->qcoeff + n * 64,
mb->block[0].dequant,
mb->dst.y_buffer + y_offset,
mb->dst.y_buffer + y_offset,
mb->dst.y_stride, mb->dst.y_stride,
mb->eobs[n * 4]);
} else {
vp9_ht_dequant_idct_add_8x8_c(tx_type, mb->qcoeff + n * 64,
mb->block[0].dequant,
mb->dst.y_buffer + y_offset,
mb->dst.y_buffer + y_offset,
mb->dst.y_stride, mb->dst.y_stride,
mb->eobs[n * 4]);
}
}
// chroma
for (n = 0; n < uv_count; n++) {
const int x_idx = n % uv_size;
const int y_idx = n / uv_size;
const int uv_offset = (y_idx * 8) * mb->dst.uv_stride + (x_idx * 8);
vp9_dequant_idct_add_8x8_c(mb->qcoeff + u_qcoeff_offset + n * 64,
mb->block[16].dequant,
mb->dst.u_buffer + uv_offset,
mb->dst.u_buffer + uv_offset,
mb->dst.uv_stride, mb->dst.uv_stride,
mb->eobs[u_eob_offset + n * 4]);
vp9_dequant_idct_add_8x8_c(mb->qcoeff + v_qcoeff_offset + n * 64,
mb->block[20].dequant,
mb->dst.v_buffer + uv_offset,
mb->dst.v_buffer + uv_offset,
mb->dst.uv_stride, mb->dst.uv_stride,
mb->eobs[v_eob_offset + n * 4]);
}
}
static void decode_sb_4x4(MACROBLOCKD *mb, int y_size) {
const int y_count = y_size * y_size;
const int uv_size = y_size / 2;
const int uv_count = uv_size * uv_size;
const int u_qcoeff_offset = y_count * 16;
const int v_qcoeff_offset = u_qcoeff_offset + uv_count * 16;
const int u_eob_offset = y_count;
const int v_eob_offset = u_eob_offset + uv_count;
int n;
for (n = 0; n < y_count; n++) {
const int x_idx = n % y_size;
const int y_idx = n / y_size;
const int y_offset = (y_idx * 4) * mb->dst.y_stride + (x_idx * 4);
const TX_TYPE tx_type = get_tx_type_4x4(mb, y_idx * (y_size*2) + x_idx);
if (tx_type == DCT_DCT) {
mb->itxm_add(mb->qcoeff + n * 16,
mb->block[0].dequant,
mb->dst.y_buffer + y_offset,
mb->dst.y_buffer + y_offset,
mb->dst.y_stride, mb->dst.y_stride,
mb->eobs[n]);
} else {
vp9_ht_dequant_idct_add_c(tx_type, mb->qcoeff + n * 16,
mb->block[0].dequant,
mb->dst.y_buffer + y_offset,
mb->dst.y_buffer + y_offset,
mb->dst.y_stride,
mb->dst.y_stride,
mb->eobs[n]);
}
}
for (n = 0; n < uv_count; n++) {
const int x_idx = n % uv_size;
const int y_idx = n / uv_size;
const int uv_offset = (y_idx * 4) * mb->dst.uv_stride + (x_idx * 4);
mb->itxm_add(mb->qcoeff + u_qcoeff_offset + n * 16,
mb->block[16].dequant,
mb->dst.u_buffer + uv_offset,
mb->dst.u_buffer + uv_offset,
mb->dst.uv_stride, mb->dst.uv_stride, mb->eobs[u_eob_offset + n]);
mb->itxm_add(mb->qcoeff + v_qcoeff_offset + n * 16,
mb->block[20].dequant,
mb->dst.v_buffer + uv_offset,
mb->dst.v_buffer + uv_offset,
mb->dst.uv_stride, mb->dst.uv_stride, mb->eobs[v_eob_offset + n]);
}
}
static void decode_sb64(VP9D_COMP *pbi, MACROBLOCKD *xd, int mb_row, int mb_col,
BOOL_DECODER* const bc) {
int n, eobtotal;
VP9_COMMON *const pc = &pbi->common;
@ -499,14 +607,13 @@ static void decode_superblock64(VP9D_COMP *pbi, MACROBLOCKD *xd,
if (mi->mbmi.mb_skip_coeff) {
vp9_reset_sb64_tokens_context(xd);
/* Special case: Force the loopfilter to skip when eobtotal and
* mb_skip_coeff are zero.
*/
// Special case: Force the loopfilter to skip when eobtotal and
// mb_skip_coeff are zero.
skip_recon_mb(pbi, xd, mb_row, mb_col);
return;
}
/* do prediction */
// do prediction
if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
vp9_build_intra_predictors_sb64y_s(xd);
vp9_build_intra_predictors_sb64uv_s(xd);
@ -514,7 +621,7 @@ static void decode_superblock64(VP9D_COMP *pbi, MACROBLOCKD *xd,
vp9_build_inter64x64_predictors_sb(xd, mb_row, mb_col);
}
/* dequantization and idct */
// dequantization and idct
eobtotal = vp9_decode_sb64_tokens(pbi, xd, bc);
if (eobtotal == 0) { // skip loopfilter
for (n = 0; n < 16; n++) {
@ -548,7 +655,6 @@ static void decode_superblock64(VP9D_COMP *pbi, MACROBLOCKD *xd,
const int y_offset = y_idx * 16 * xd->dst.y_stride + x_idx * 16;
const TX_TYPE tx_type = get_tx_type_16x16(xd,
(y_idx * 16 + x_idx) * 4);
if (tx_type == DCT_DCT) {
vp9_dequant_idct_add_16x16(xd->qcoeff + n * 256,
xd->block[0].dequant,
@ -579,71 +685,10 @@ static void decode_superblock64(VP9D_COMP *pbi, MACROBLOCKD *xd,
}
break;
case TX_8X8:
for (n = 0; n < 64; n++) {
const int x_idx = n & 7, y_idx = n >> 3;
const int y_offset = y_idx * 8 * xd->dst.y_stride + x_idx * 8;
const TX_TYPE tx_type = get_tx_type_8x8(xd, (y_idx * 16 + x_idx) * 2);
if (tx_type == DCT_DCT) {
vp9_dequant_idct_add_8x8_c(xd->qcoeff + n * 64,
xd->block[0].dequant,
xd->dst.y_buffer + y_offset,
xd->dst.y_buffer + y_offset,
xd->dst.y_stride, xd->dst.y_stride, xd->eobs[n * 4]);
} else {
vp9_ht_dequant_idct_add_8x8_c(tx_type, xd->qcoeff + n * 64,
xd->block[0].dequant,
xd->dst.y_buffer + y_offset,
xd->dst.y_buffer + y_offset,
xd->dst.y_stride, xd->dst.y_stride, xd->eobs[n * 4]);
}
}
for (n = 0; n < 16; n++) {
const int x_idx = n & 3, y_idx = n >> 2;
const int uv_offset = y_idx * 8 * xd->dst.uv_stride + x_idx * 8;
vp9_dequant_idct_add_8x8_c(xd->qcoeff + n * 64 + 4096,
xd->block[16].dequant,
xd->dst.u_buffer + uv_offset,
xd->dst.u_buffer + uv_offset,
xd->dst.uv_stride, xd->dst.uv_stride, xd->eobs[256 + n * 4]);
vp9_dequant_idct_add_8x8_c(xd->qcoeff + n * 64 + 4096 + 1024,
xd->block[20].dequant,
xd->dst.v_buffer + uv_offset,
xd->dst.v_buffer + uv_offset,
xd->dst.uv_stride, xd->dst.uv_stride, xd->eobs[320 + n * 4]);
}
decode_sb_8x8(xd, 8);
break;
case TX_4X4:
for (n = 0; n < 256; n++) {
const int x_idx = n & 15, y_idx = n >> 4;
const int y_offset = y_idx * 4 * xd->dst.y_stride + x_idx * 4;
const TX_TYPE tx_type = get_tx_type_4x4(xd, y_idx * 16 + x_idx);
if (tx_type == DCT_DCT) {
xd->itxm_add(xd->qcoeff + n * 16, xd->block[0].dequant,
xd->dst.y_buffer + y_offset,
xd->dst.y_buffer + y_offset,
xd->dst.y_stride, xd->dst.y_stride, xd->eobs[n]);
} else {
vp9_ht_dequant_idct_add_c(tx_type, xd->qcoeff + n * 16,
xd->block[0].dequant,
xd->dst.y_buffer + y_offset,
xd->dst.y_buffer + y_offset,
xd->dst.y_stride, xd->dst.y_stride, xd->eobs[n]);
}
}
for (n = 0; n < 64; n++) {
const int x_idx = n & 7, y_idx = n >> 3;
const int uv_offset = y_idx * 4 * xd->dst.uv_stride + x_idx * 4;
xd->itxm_add(xd->qcoeff + 4096 + n * 16,
xd->block[16].dequant,
xd->dst.u_buffer + uv_offset,
xd->dst.u_buffer + uv_offset,
xd->dst.uv_stride, xd->dst.uv_stride, xd->eobs[256 + n]);
xd->itxm_add(xd->qcoeff + 4096 + 1024 + n * 16,
xd->block[20].dequant,
xd->dst.v_buffer + uv_offset,
xd->dst.v_buffer + uv_offset,
xd->dst.uv_stride, xd->dst.uv_stride, xd->eobs[320 + n]);
}
decode_sb_4x4(xd, 16);
break;
default: assert(0);
}
@ -653,8 +698,7 @@ static void decode_superblock64(VP9D_COMP *pbi, MACROBLOCKD *xd,
#endif
}
static void decode_superblock32(VP9D_COMP *pbi, MACROBLOCKD *xd,
int mb_row, int mb_col,
static void decode_sb32(VP9D_COMP *pbi, MACROBLOCKD *xd, int mb_row, int mb_col,
BOOL_DECODER* const bc) {
int n, eobtotal;
VP9_COMMON *const pc = &pbi->common;
@ -673,14 +717,14 @@ static void decode_superblock32(VP9D_COMP *pbi, MACROBLOCKD *xd,
if (mi->mbmi.mb_skip_coeff) {
vp9_reset_sb_tokens_context(xd);
/* Special case: Force the loopfilter to skip when eobtotal and
* mb_skip_coeff are zero.
*/
// Special case: Force the loopfilter to skip when eobtotal and
// mb_skip_coeff are zero.
skip_recon_mb(pbi, xd, mb_row, mb_col);
return;
}
/* do prediction */
// do prediction
if (mi->mbmi.ref_frame == INTRA_FRAME) {
vp9_build_intra_predictors_sby_s(xd);
vp9_build_intra_predictors_sbuv_s(xd);
@ -688,7 +732,7 @@ static void decode_superblock32(VP9D_COMP *pbi, MACROBLOCKD *xd,
vp9_build_inter32x32_predictors_sb(xd, mb_row, mb_col);
}
/* dequantization and idct */
// dequantization and idct
eobtotal = vp9_decode_sb_tokens(pbi, xd, bc);
if (eobtotal == 0) { // skip loopfilter
mi->mbmi.mb_skip_coeff = 1;
@ -739,73 +783,10 @@ static void decode_superblock32(VP9D_COMP *pbi, MACROBLOCKD *xd,
xd->dst.uv_stride, xd);
break;
case TX_8X8:
for (n = 0; n < 16; n++) {
const int x_idx = n & 3, y_idx = n >> 2;
const int y_offset = y_idx * 8 * xd->dst.y_stride + x_idx * 8;
const TX_TYPE tx_type = get_tx_type_8x8(xd, (y_idx * 8 + x_idx) * 2);
if (tx_type == DCT_DCT) {
vp9_dequant_idct_add_8x8_c(xd->qcoeff + n * 64,
xd->block[0].dequant,
xd->dst.y_buffer + y_offset,
xd->dst.y_buffer + y_offset,
xd->dst.y_stride, xd->dst.y_stride, xd->eobs[n * 4]);
} else {
vp9_ht_dequant_idct_add_8x8_c(tx_type, xd->qcoeff + n * 64,
xd->block[0].dequant,
xd->dst.y_buffer + y_offset,
xd->dst.y_buffer + y_offset,
xd->dst.y_stride, xd->dst.y_stride, xd->eobs[n * 4]);
}
}
for (n = 0; n < 4; n++) {
const int x_idx = n & 1, y_idx = n >> 1;
const int uv_offset = y_idx * 8 * xd->dst.uv_stride + x_idx * 8;
vp9_dequant_idct_add_8x8_c(xd->qcoeff + n * 64 + 1024,
xd->block[16].dequant,
xd->dst.u_buffer + uv_offset,
xd->dst.u_buffer + uv_offset,
xd->dst.uv_stride, xd->dst.uv_stride, xd->eobs[64 + n * 4]);
vp9_dequant_idct_add_8x8_c(xd->qcoeff + n * 64 + 1280,
xd->block[20].dequant,
xd->dst.v_buffer + uv_offset,
xd->dst.v_buffer + uv_offset,
xd->dst.uv_stride, xd->dst.uv_stride, xd->eobs[80 + n * 4]);
}
decode_sb_8x8(xd, 4);
break;
case TX_4X4:
for (n = 0; n < 64; n++) {
const int x_idx = n & 7, y_idx = n >> 3;
const int y_offset = y_idx * 4 * xd->dst.y_stride + x_idx * 4;
const TX_TYPE tx_type = get_tx_type_4x4(xd, y_idx * 8 + x_idx);
if (tx_type == DCT_DCT) {
xd->itxm_add(xd->qcoeff + n * 16, xd->block[0].dequant,
xd->dst.y_buffer + y_offset,
xd->dst.y_buffer + y_offset,
xd->dst.y_stride, xd->dst.y_stride, xd->eobs[n]);
} else {
vp9_ht_dequant_idct_add_c(tx_type, xd->qcoeff + n * 16,
xd->block[0].dequant,
xd->dst.y_buffer + y_offset,
xd->dst.y_buffer + y_offset,
xd->dst.y_stride, xd->dst.y_stride, xd->eobs[n]);
}
}
for (n = 0; n < 16; n++) {
const int x_idx = n & 3, y_idx = n >> 2;
const int uv_offset = y_idx * 4 * xd->dst.uv_stride + x_idx * 4;
xd->itxm_add(xd->qcoeff + 1024 + n * 16,
xd->block[16].dequant,
xd->dst.u_buffer + uv_offset,
xd->dst.u_buffer + uv_offset,
xd->dst.uv_stride, xd->dst.uv_stride, xd->eobs[64 + n]);
xd->itxm_add(xd->qcoeff + 1280 + n * 16,
xd->block[20].dequant,
xd->dst.v_buffer + uv_offset,
xd->dst.v_buffer + uv_offset,
xd->dst.uv_stride, xd->dst.uv_stride, xd->eobs[80 + n]);
}
decode_sb_4x4(xd, 8);
break;
default: assert(0);
}
@ -815,12 +796,12 @@ static void decode_superblock32(VP9D_COMP *pbi, MACROBLOCKD *xd,
#endif
}
static void decode_macroblock(VP9D_COMP *pbi, MACROBLOCKD *xd,
int mb_row, unsigned int mb_col,
static void decode_mb(VP9D_COMP *pbi, MACROBLOCKD *xd,
int mb_row, int mb_col,
BOOL_DECODER* const bc) {
int eobtotal = 0;
MB_PREDICTION_MODE mode;
int tx_size;
const MB_PREDICTION_MODE mode = xd->mode_info_context->mbmi.mode;
const int tx_size = xd->mode_info_context->mbmi.txfm_size;
assert(!xd->mode_info_context->mbmi.sb_type);
@ -828,9 +809,6 @@ static void decode_macroblock(VP9D_COMP *pbi, MACROBLOCKD *xd,
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)) {
@ -848,8 +826,8 @@ static void decode_macroblock(VP9D_COMP *pbi, MACROBLOCKD *xd,
mode != SPLITMV &&
mode != I8X8_PRED &&
!bool_error(bc)) {
/* Special case: Force the loopfilter to skip when eobtotal and
mb_skip_coeff are zero. */
// 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, mb_row, mb_col);
return;
@ -863,14 +841,13 @@ static void decode_macroblock(VP9D_COMP *pbi, MACROBLOCKD *xd,
// if (xd->segmentation_enabled)
// mb_init_dequantizer(pbi, xd);
/* do prediction */
// 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) {
if (mode != B_PRED)
vp9_build_intra_predictors_mby(xd);
}
}
} else {
#if 0 // def DEC_DEBUG
if (dec_debug)
@ -935,7 +912,7 @@ static int get_delta_q(vp9_reader *bc, int prev, int *q_update) {
ret_val = -ret_val;
}
/* Trigger a quantizer update if the delta-q value has changed */
// Trigger a quantizer update if the delta-q value has changed
if (ret_val != prev)
*q_update = 1;
@ -985,25 +962,21 @@ static void set_refs(VP9D_COMP *pbi, int block_size, int mb_row, int mb_col) {
if (mbmi->ref_frame > INTRA_FRAME) {
// Select the appropriate reference frame for this MB
int ref_fb_idx = cm->active_ref_idx[mbmi->ref_frame - 1];
const int fb_idx = cm->active_ref_idx[mbmi->ref_frame - 1];
const YV12_BUFFER_CONFIG *cfg = &cm->yv12_fb[fb_idx];
xd->scale_factor[0] = cm->active_ref_scale[mbmi->ref_frame - 1];
xd->scale_factor_uv[0] = cm->active_ref_scale[mbmi->ref_frame - 1];
setup_pred_block(&xd->pre, &cm->yv12_fb[ref_fb_idx], mb_row, mb_col,
setup_pred_block(&xd->pre, cfg, mb_row, mb_col,
&xd->scale_factor[0], &xd->scale_factor_uv[0]);
// propagate errors from reference frames
xd->corrupted |= cm->yv12_fb[ref_fb_idx].corrupted;
xd->corrupted |= cfg->corrupted;
if (mbmi->second_ref_frame > INTRA_FRAME) {
// Select the appropriate reference frame for this MB
int second_ref_fb_idx = cm->active_ref_idx[mbmi->second_ref_frame - 1];
setup_pred_block(&xd->second_pre, &cm->yv12_fb[second_ref_fb_idx],
mb_row, mb_col,
const int second_fb_idx = cm->active_ref_idx[mbmi->second_ref_frame - 1];
const YV12_BUFFER_CONFIG *second_cfg = &cm->yv12_fb[second_fb_idx];
setup_pred_block(&xd->second_pre, second_cfg, mb_row, mb_col,
&xd->scale_factor[1], &xd->scale_factor_uv[1]);
// propagate errors from reference frames
xd->corrupted |= cm->yv12_fb[second_ref_fb_idx].corrupted;
xd->corrupted |= second_cfg->corrupted;
}
}
}
@ -1029,7 +1002,7 @@ static void decode_sb_row(VP9D_COMP *pbi, VP9_COMMON *pc,
set_offsets(pbi, 64, mb_row, mb_col);
vp9_decode_mb_mode_mv(pbi, xd, mb_row, mb_col, bc);
set_refs(pbi, 64, mb_row, mb_col);
decode_superblock64(pbi, xd, mb_row, mb_col, bc);
decode_sb64(pbi, xd, mb_row, mb_col, bc);
xd->corrupted |= bool_error(bc);
} else {
int j;
@ -1056,8 +1029,7 @@ static void decode_sb_row(VP9D_COMP *pbi, VP9_COMMON *pc,
vp9_decode_mb_mode_mv(pbi,
xd, mb_row + y_idx_sb, mb_col + x_idx_sb, bc);
set_refs(pbi, 32, mb_row + y_idx_sb, mb_col + x_idx_sb);
decode_superblock32(pbi,
xd, mb_row + y_idx_sb, mb_col + x_idx_sb, bc);
decode_sb32(pbi, xd, mb_row + y_idx_sb, mb_col + x_idx_sb, bc);
xd->corrupted |= bool_error(bc);
} else {
int i;
@ -1083,7 +1055,7 @@ static void decode_sb_row(VP9D_COMP *pbi, VP9_COMMON *pc,
xd->mb_index = i;
vp9_decode_mb_mode_mv(pbi, xd, mb_row + y_idx, mb_col + x_idx, bc);
set_refs(pbi, 16, mb_row + y_idx, mb_col + x_idx);
decode_macroblock(pbi, xd, mb_row + y_idx, mb_col + x_idx, bc);
decode_mb(pbi, xd, mb_row + y_idx, mb_col + x_idx, bc);
/* check if the boolean decoder has suffered an error */
xd->corrupted |= bool_error(bc);
@ -1319,9 +1291,8 @@ static void setup_segmentation(VP9_COMMON *pc, MACROBLOCKD *xd, vp9_reader *r) {
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++) {
for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
xd->mb_segment_tree_probs[i] = vp9_read_bit(r) ? vp9_read_prob(r) : 255;
}
// Read the prediction probs needed to decode the segment id
pc->temporal_update = vp9_read_bit(r);
@ -1348,8 +1319,6 @@ static void setup_segmentation(VP9_COMMON *pc, MACROBLOCKD *xd, vp9_reader *r) {
xd->update_mb_segmentation_data = vp9_read_bit(r);
if (xd->update_mb_segmentation_data) {
int data;
xd->mb_segment_abs_delta = vp9_read_bit(r);
vp9_clearall_segfeatures(xd);
@ -1358,16 +1327,15 @@ static void setup_segmentation(VP9_COMMON *pc, MACROBLOCKD *xd, vp9_reader *r) {
for (i = 0; i < MAX_MB_SEGMENTS; i++) {
// For each of the segments features...
for (j = 0; j < SEG_LVL_MAX; j++) {
int data;
// Is the feature enabled
if (vp9_read_bit(r)) {
// Update the feature data and mask
vp9_enable_segfeature(xd, i, j);
data = vp9_decode_unsigned_max(r, vp9_seg_feature_data_max(j));
// Is the segment data signed..
if (vp9_is_segfeature_signed(j)) {
if (vp9_read_bit(r))
// Is the segment data signed.
if (vp9_is_segfeature_signed(j) && vp9_read_bit(r)) {
data = -data;
}
} else {
@ -1751,12 +1719,12 @@ int vp9_decode_frame(VP9D_COMP *pbi, const unsigned char **p_data_end) {
// Dummy read for now
vp9_read_literal(&header_bc, 2);
/* Read the default quantizers. */
// Read the default quantizers.
{
int q_update = 0;
pc->base_qindex = vp9_read_literal(&header_bc, QINDEX_BITS);
/* AC 1st order Q = default */
// AC 1st order Q = default
pc->y1dc_delta_q = get_delta_q(&header_bc, pc->y1dc_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);
@ -1764,7 +1732,7 @@ int vp9_decode_frame(VP9D_COMP *pbi, const unsigned char **p_data_end) {
if (q_update)
vp9_init_de_quantizer(pbi);
/* MB level dequantizer setup */
// MB level dequantizer setup
mb_init_dequantizer(pbi, &pbi->mb);
}