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896d79a57e
vpx/vp9/decoder/vp9_decodeframe.c
Yaowu Xu 896d79a57e Removed the reset of mode_info from previous frame 
Prior to this commit, both encoder and decoder reset mode/mv info from
previous frame in error resilient mode to ensure bitstreams are able to
decode when there is loss of frame in decoder side. However, this is
not necessary. This commit changed to remove the reset, so encoder can
continue to use mode/mv/partition information from previously encoded
frame without affecting decodeablilty under loss of frame.

Change-Id: I0279f862900dc647fb471ae3389770bb1b9f454f
2014-02-13 12:48:08 -08:00

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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 <assert.h>
#include <stdlib.h> // qsort()
#include "./vp9_rtcd.h"
#include "./vpx_scale_rtcd.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_scale/vpx_scale.h"
#include "vp9/common/vp9_alloccommon.h"
#include "vp9/common/vp9_common.h"
#include "vp9/common/vp9_entropy.h"
#include "vp9/common/vp9_entropymode.h"
#include "vp9/common/vp9_idct.h"
#include "vp9/common/vp9_pred_common.h"
#include "vp9/common/vp9_quant_common.h"
#include "vp9/common/vp9_reconintra.h"
#include "vp9/common/vp9_reconinter.h"
#include "vp9/common/vp9_seg_common.h"
#include "vp9/common/vp9_tile_common.h"
#include "vp9/decoder/vp9_decodeframe.h"
#include "vp9/decoder/vp9_detokenize.h"
#include "vp9/decoder/vp9_decodemv.h"
#include "vp9/decoder/vp9_dsubexp.h"
#include "vp9/decoder/vp9_dthread.h"
#include "vp9/decoder/vp9_onyxd_int.h"
#include "vp9/decoder/vp9_read_bit_buffer.h"
#include "vp9/decoder/vp9_reader.h"
#include "vp9/decoder/vp9_thread.h"
static int read_be32(const uint8_t *p) {
return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
}
static int is_compound_reference_allowed(const VP9_COMMON *cm) {
int i;
for (i = 1; i < REFS_PER_FRAME; ++i)
if (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1])
return 1;
return 0;
}
static void setup_compound_reference(VP9_COMMON *cm) {
if (cm->ref_frame_sign_bias[LAST_FRAME] ==
cm->ref_frame_sign_bias[GOLDEN_FRAME]) {
cm->comp_fixed_ref = ALTREF_FRAME;
cm->comp_var_ref[0] = LAST_FRAME;
cm->comp_var_ref[1] = GOLDEN_FRAME;
} else if (cm->ref_frame_sign_bias[LAST_FRAME] ==
cm->ref_frame_sign_bias[ALTREF_FRAME]) {
cm->comp_fixed_ref = GOLDEN_FRAME;
cm->comp_var_ref[0] = LAST_FRAME;
cm->comp_var_ref[1] = ALTREF_FRAME;
} else {
cm->comp_fixed_ref = LAST_FRAME;
cm->comp_var_ref[0] = GOLDEN_FRAME;
cm->comp_var_ref[1] = ALTREF_FRAME;
}
}
static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) {
return len != 0 && len <= (size_t)(end - start);
}
static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) {
const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max));
return data > max ? max : data;
}
static TX_MODE read_tx_mode(vp9_reader *r) {
TX_MODE tx_mode = vp9_read_literal(r, 2);
if (tx_mode == ALLOW_32X32)
tx_mode += vp9_read_bit(r);
return tx_mode;
}
static void read_tx_mode_probs(struct tx_probs *tx_probs, vp9_reader *r) {
int i, j;
for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
for (j = 0; j < TX_SIZES - 3; ++j)
vp9_diff_update_prob(r, &tx_probs->p8x8[i][j]);
for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
for (j = 0; j < TX_SIZES - 2; ++j)
vp9_diff_update_prob(r, &tx_probs->p16x16[i][j]);
for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
for (j = 0; j < TX_SIZES - 1; ++j)
vp9_diff_update_prob(r, &tx_probs->p32x32[i][j]);
}
static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
int i, j;
for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)
for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i)
vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);
}
static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
int i, j;
for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
for (j = 0; j < INTER_MODES - 1; ++j)
vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]);
}
static REFERENCE_MODE read_reference_mode(VP9_COMMON *cm, vp9_reader *r) {
if (is_compound_reference_allowed(cm)) {
REFERENCE_MODE mode = vp9_read_bit(r);
if (mode)
mode += vp9_read_bit(r);
setup_compound_reference(cm);
return mode;
} else {
return SINGLE_REFERENCE;
}
}
static void read_reference_mode_probs(VP9_COMMON *cm, vp9_reader *r) {
int i;
if (cm->reference_mode == REFERENCE_MODE_SELECT)
for (i = 0; i < COMP_INTER_CONTEXTS; i++)
vp9_diff_update_prob(r, &cm->fc.comp_inter_prob[i]);
if (cm->reference_mode != COMPOUND_REFERENCE)
for (i = 0; i < REF_CONTEXTS; i++) {
vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][0]);
vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][1]);
}
if (cm->reference_mode != SINGLE_REFERENCE)
for (i = 0; i < REF_CONTEXTS; i++)
vp9_diff_update_prob(r, &cm->fc.comp_ref_prob[i]);
}
static void update_mv_probs(vp9_prob *p, int n, vp9_reader *r) {
int i;
for (i = 0; i < n; ++i)
if (vp9_read(r, NMV_UPDATE_PROB))
p[i] = (vp9_read_literal(r, 7) << 1) | 1;
}
static void read_mv_probs(nmv_context *ctx, int allow_hp, vp9_reader *r) {
int i, j;
update_mv_probs(ctx->joints, MV_JOINTS - 1, r);
for (i = 0; i < 2; ++i) {
nmv_component *const comp_ctx = &ctx->comps[i];
update_mv_probs(&comp_ctx->sign, 1, r);
update_mv_probs(comp_ctx->classes, MV_CLASSES - 1, r);
update_mv_probs(comp_ctx->class0, CLASS0_SIZE - 1, r);
update_mv_probs(comp_ctx->bits, MV_OFFSET_BITS, r);
}
for (i = 0; i < 2; ++i) {
nmv_component *const comp_ctx = &ctx->comps[i];
for (j = 0; j < CLASS0_SIZE; ++j)
update_mv_probs(comp_ctx->class0_fp[j], MV_FP_SIZE - 1, r);
update_mv_probs(comp_ctx->fp, 3, r);
}
if (allow_hp) {
for (i = 0; i < 2; ++i) {
nmv_component *const comp_ctx = &ctx->comps[i];
update_mv_probs(&comp_ctx->class0_hp, 1, r);
update_mv_probs(&comp_ctx->hp, 1, r);
}
}
}
static void setup_plane_dequants(VP9_COMMON *cm, MACROBLOCKD *xd, int q_index) {
int i;
xd->plane[0].dequant = cm->y_dequant[q_index];
for (i = 1; i < MAX_MB_PLANE; i++)
xd->plane[i].dequant = cm->uv_dequant[q_index];
}
// Allocate storage for each tile column.
// TODO(jzern): when max_threads <= 1 the same storage could be used for each
// tile.
static void alloc_tile_storage(VP9D_COMP *pbi, int tile_rows, int tile_cols) {
VP9_COMMON *const cm = &pbi->common;
const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);
int i, tile_row, tile_col;
CHECK_MEM_ERROR(cm, pbi->mi_streams,
vpx_realloc(pbi->mi_streams, tile_rows * tile_cols *
sizeof(*pbi->mi_streams)));
for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
TileInfo tile;
vp9_tile_init(&tile, cm, tile_row, tile_col);
pbi->mi_streams[tile_row * tile_cols + tile_col] =
&cm->mi[tile.mi_row_start * cm->mode_info_stride
+ tile.mi_col_start];
}
}
// 2 contexts per 'mi unit', so that we have one context per 4x4 txfm
// block where mi unit size is 8x8.
CHECK_MEM_ERROR(cm, pbi->above_context[0],
vpx_realloc(pbi->above_context[0],
sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *
2 * aligned_mi_cols));
for (i = 1; i < MAX_MB_PLANE; ++i) {
pbi->above_context[i] = pbi->above_context[0] +
i * sizeof(*pbi->above_context[0]) *
2 * aligned_mi_cols;
}
// This is sized based on the entire frame. Each tile operates within its
// column bounds.
CHECK_MEM_ERROR(cm, pbi->above_seg_context,
vpx_realloc(pbi->above_seg_context,
sizeof(*pbi->above_seg_context) *
aligned_mi_cols));
}
static void inverse_transform_block(MACROBLOCKD* xd, int plane, int block,
TX_SIZE tx_size, uint8_t *dst, int stride,
int eob) {
struct macroblockd_plane *const pd = &xd->plane[plane];
if (eob > 0) {
TX_TYPE tx_type;
const int plane_type = pd->plane_type;
int16_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
switch (tx_size) {
case TX_4X4:
tx_type = get_tx_type_4x4(plane_type, xd, block);
if (tx_type == DCT_DCT)
xd->itxm_add(dqcoeff, dst, stride, eob);
else
vp9_iht4x4_16_add(dqcoeff, dst, stride, tx_type);
break;
case TX_8X8:
tx_type = get_tx_type_8x8(plane_type, xd);
vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob);
break;
case TX_16X16:
tx_type = get_tx_type_16x16(plane_type, xd);
vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob);
break;
case TX_32X32:
tx_type = DCT_DCT;
vp9_idct32x32_add(dqcoeff, dst, stride, eob);
break;
default:
assert(0 && "Invalid transform size");
}
if (eob == 1) {
vpx_memset(dqcoeff, 0, 2 * sizeof(dqcoeff[0]));
} else {
if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10)
vpx_memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0]));
else if (tx_size == TX_32X32 && eob <= 34)
vpx_memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0]));
else
vpx_memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));
}
}
}
struct intra_args {
VP9_COMMON *cm;
MACROBLOCKD *xd;
vp9_reader *r;
};
static void predict_and_reconstruct_intra_block(int plane, int block,
BLOCK_SIZE plane_bsize,
TX_SIZE tx_size, void *arg) {
struct intra_args *const args = arg;
VP9_COMMON *const cm = args->cm;
MACROBLOCKD *const xd = args->xd;
struct macroblockd_plane *const pd = &xd->plane[plane];
MODE_INFO *const mi = xd->mi_8x8[0];
const MB_PREDICTION_MODE mode = (plane == 0)
? ((mi->mbmi.sb_type < BLOCK_8X8) ? mi->bmi[block].as_mode
: mi->mbmi.mode)
: mi->mbmi.uv_mode;
int x, y;
uint8_t *dst;
txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
dst = &pd->dst.buf[4 * y * pd->dst.stride + 4 * x];
vp9_predict_intra_block(xd, block >> (tx_size << 1),
b_width_log2(plane_bsize), tx_size, mode,
dst, pd->dst.stride, dst, pd->dst.stride,
x, y, plane);
if (!mi->mbmi.skip_coeff) {
const int eob = vp9_decode_block_tokens(cm, xd, plane, block,
plane_bsize, x, y, tx_size,
args->r);
inverse_transform_block(xd, plane, block, tx_size, dst, pd->dst.stride,
eob);
}
}
struct inter_args {
VP9_COMMON *cm;
MACROBLOCKD *xd;
vp9_reader *r;
int *eobtotal;
};
static void reconstruct_inter_block(int plane, int block,
BLOCK_SIZE plane_bsize,
TX_SIZE tx_size, void *arg) {
struct inter_args *args = arg;
VP9_COMMON *const cm = args->cm;
MACROBLOCKD *const xd = args->xd;
struct macroblockd_plane *const pd = &xd->plane[plane];
int x, y, eob;
txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
eob = vp9_decode_block_tokens(cm, xd, plane, block, plane_bsize, x, y,
tx_size, args->r);
inverse_transform_block(xd, plane, block, tx_size,
&pd->dst.buf[4 * y * pd->dst.stride + 4 * x],
pd->dst.stride, eob);
*args->eobtotal += eob;
}
static void set_offsets(VP9_COMMON *const cm, MACROBLOCKD *const xd,
const TileInfo *const tile,
BLOCK_SIZE bsize, int mi_row, int mi_col) {
const int bw = num_8x8_blocks_wide_lookup[bsize];
const int bh = num_8x8_blocks_high_lookup[bsize];
const int x_mis = MIN(bw, cm->mi_cols - mi_col);
const int y_mis = MIN(bh, cm->mi_rows - mi_row);
const int offset = mi_row * cm->mode_info_stride + mi_col;
const int tile_offset = tile->mi_row_start * cm->mode_info_stride +
tile->mi_col_start;
int x, y;
xd->mi_8x8 = cm->mi_grid_visible + offset;
xd->prev_mi_8x8 = cm->prev_mi_grid_visible + offset;
xd->last_mi = cm->coding_use_prev_mi && cm->prev_mi ?
xd->prev_mi_8x8[0] : NULL;
xd->mi_8x8[0] = xd->mi_stream + offset - tile_offset;
xd->mi_8x8[0]->mbmi.sb_type = bsize;
for (y = 0; y < y_mis; ++y)
for (x = !y; x < x_mis; ++x)
xd->mi_8x8[y * cm->mode_info_stride + x] = xd->mi_8x8[0];
set_skip_context(xd, xd->above_context, xd->left_context, mi_row, mi_col);
// 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
set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);
setup_dst_planes(xd, get_frame_new_buffer(cm), mi_row, mi_col);
}
static void set_ref(VP9_COMMON *const cm, MACROBLOCKD *const xd,
int idx, int mi_row, int mi_col) {
MB_MODE_INFO *const mbmi = &xd->mi_8x8[0]->mbmi;
RefBuffer *ref_buffer = &cm->frame_refs[mbmi->ref_frame[idx] - LAST_FRAME];
xd->block_refs[idx] = ref_buffer;
if (!vp9_is_valid_scale(&ref_buffer->sf))
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
"Invalid scale factors");
setup_pre_planes(xd, idx, ref_buffer->buf, mi_row, mi_col, &ref_buffer->sf);
xd->corrupted |= ref_buffer->buf->corrupted;
}
static void decode_modes_b(VP9_COMMON *const cm, MACROBLOCKD *const xd,
const TileInfo *const tile,
int mi_row, int mi_col,
vp9_reader *r, BLOCK_SIZE bsize) {
const int less8x8 = bsize < BLOCK_8X8;
MB_MODE_INFO *mbmi;
set_offsets(cm, xd, tile, bsize, mi_row, mi_col);
vp9_read_mode_info(cm, xd, tile, mi_row, mi_col, r);
if (less8x8)
bsize = BLOCK_8X8;
// Has to be called after set_offsets
mbmi = &xd->mi_8x8[0]->mbmi;
if (mbmi->skip_coeff) {
reset_skip_context(xd, bsize);
} else {
if (cm->seg.enabled)
setup_plane_dequants(cm, xd, vp9_get_qindex(&cm->seg, mbmi->segment_id,
cm->base_qindex));
}
if (!is_inter_block(mbmi)) {
struct intra_args arg = { cm, xd, r };
vp9_foreach_transformed_block(xd, bsize,
predict_and_reconstruct_intra_block, &arg);
} else {
// Setup
set_ref(cm, xd, 0, mi_row, mi_col);
if (has_second_ref(mbmi))
set_ref(cm, xd, 1, mi_row, mi_col);
xd->interp_kernel = vp9_get_interp_kernel(mbmi->interp_filter);
// Prediction
vp9_dec_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);
// Reconstruction
if (!mbmi->skip_coeff) {
int eobtotal = 0;
struct inter_args arg = { cm, xd, r, &eobtotal };
vp9_foreach_transformed_block(xd, bsize, reconstruct_inter_block, &arg);
if (!less8x8 && eobtotal == 0)
mbmi->skip_coeff = 1; // skip loopfilter
}
}
xd->corrupted |= vp9_reader_has_error(r);
}
static PARTITION_TYPE read_partition(VP9_COMMON *cm, MACROBLOCKD *xd, int hbs,
int mi_row, int mi_col, BLOCK_SIZE bsize,
vp9_reader *r) {
const int ctx = partition_plane_context(xd->above_seg_context,
xd->left_seg_context,
mi_row, mi_col, bsize);
const vp9_prob *const probs = get_partition_probs(cm, ctx);
const int has_rows = (mi_row + hbs) < cm->mi_rows;
const int has_cols = (mi_col + hbs) < cm->mi_cols;
PARTITION_TYPE p;
if (has_rows && has_cols)
p = vp9_read_tree(r, vp9_partition_tree, probs);
else if (!has_rows && has_cols)
p = vp9_read(r, probs[1]) ? PARTITION_SPLIT : PARTITION_HORZ;
else if (has_rows && !has_cols)
p = vp9_read(r, probs[2]) ? PARTITION_SPLIT : PARTITION_VERT;
else
p = PARTITION_SPLIT;
if (!cm->frame_parallel_decoding_mode)
++cm->counts.partition[ctx][p];
return p;
}
static void decode_modes_sb(VP9_COMMON *const cm, MACROBLOCKD *const xd,
const TileInfo *const tile,
int mi_row, int mi_col,
vp9_reader* r, BLOCK_SIZE bsize) {
const int hbs = num_8x8_blocks_wide_lookup[bsize] / 2;
PARTITION_TYPE partition;
BLOCK_SIZE subsize;
if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols)
return;
partition = read_partition(cm, xd, hbs, mi_row, mi_col, bsize, r);
subsize = get_subsize(bsize, partition);
if (subsize < BLOCK_8X8) {
decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize);
} else {
switch (partition) {
case PARTITION_NONE:
decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize);
break;
case PARTITION_HORZ:
decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize);
if (mi_row + hbs < cm->mi_rows)
decode_modes_b(cm, xd, tile, mi_row + hbs, mi_col, r, subsize);
break;
case PARTITION_VERT:
decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize);
if (mi_col + hbs < cm->mi_cols)
decode_modes_b(cm, xd, tile, mi_row, mi_col + hbs, r, subsize);
break;
case PARTITION_SPLIT:
decode_modes_sb(cm, xd, tile, mi_row, mi_col, r, subsize);
decode_modes_sb(cm, xd, tile, mi_row, mi_col + hbs, r, subsize);
decode_modes_sb(cm, xd, tile, mi_row + hbs, mi_col, r, subsize);
decode_modes_sb(cm, xd, tile, mi_row + hbs, mi_col + hbs, r, subsize);
break;
default:
assert(0 && "Invalid partition type");
}
}
// update partition context
if (bsize >= BLOCK_8X8 &&
(bsize == BLOCK_8X8 || partition != PARTITION_SPLIT))
update_partition_context(xd->above_seg_context, xd->left_seg_context,
mi_row, mi_col, subsize, bsize);
}
static void setup_token_decoder(const uint8_t *data,
const uint8_t *data_end,
size_t read_size,
struct vpx_internal_error_info *error_info,
vp9_reader *r) {
// 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(data, read_size, data_end))
vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet or corrupt tile length");
if (vp9_reader_init(r, data, read_size))
vpx_internal_error(error_info, VPX_CODEC_MEM_ERROR,
"Failed to allocate bool decoder %d", 1);
}
static void read_coef_probs_common(vp9_coeff_probs_model *coef_probs,
vp9_reader *r) {
int i, j, k, l, m;
if (vp9_read_bit(r))
for (i = 0; i < PLANE_TYPES; ++i)
for (j = 0; j < REF_TYPES; ++j)
for (k = 0; k < COEF_BANDS; ++k)
for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l)
for (m = 0; m < UNCONSTRAINED_NODES; ++m)
vp9_diff_update_prob(r, &coef_probs[i][j][k][l][m]);
}
static void read_coef_probs(FRAME_CONTEXT *fc, TX_MODE tx_mode,
vp9_reader *r) {
const TX_SIZE max_tx_size = tx_mode_to_biggest_tx_size[tx_mode];
TX_SIZE tx_size;
for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size)
read_coef_probs_common(fc->coef_probs[tx_size], r);
}
static void setup_segmentation(struct segmentation *seg,
struct vp9_read_bit_buffer *rb) {
int i, j;
seg->update_map = 0;
seg->update_data = 0;
seg->enabled = vp9_rb_read_bit(rb);
if (!seg->enabled)
return;
// Segmentation map update
seg->update_map = vp9_rb_read_bit(rb);
if (seg->update_map) {
for (i = 0; i < SEG_TREE_PROBS; i++)
seg->tree_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)
: MAX_PROB;
seg->temporal_update = vp9_rb_read_bit(rb);
if (seg->temporal_update) {
for (i = 0; i < PREDICTION_PROBS; i++)
seg->pred_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)
: MAX_PROB;
} else {
for (i = 0; i < PREDICTION_PROBS; i++)
seg->pred_probs[i] = MAX_PROB;
}
}
// Segmentation data update
seg->update_data = vp9_rb_read_bit(rb);
if (seg->update_data) {
seg->abs_delta = vp9_rb_read_bit(rb);
vp9_clearall_segfeatures(seg);
for (i = 0; i < MAX_SEGMENTS; i++) {
for (j = 0; j < SEG_LVL_MAX; j++) {
int data = 0;
const int feature_enabled = vp9_rb_read_bit(rb);
if (feature_enabled) {
vp9_enable_segfeature(seg, i, j);
data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j));
if (vp9_is_segfeature_signed(j))
data = vp9_rb_read_bit(rb) ? -data : data;
}
vp9_set_segdata(seg, i, j, data);
}
}
}
}
static void setup_loopfilter(struct loopfilter *lf,
struct vp9_read_bit_buffer *rb) {
lf->filter_level = vp9_rb_read_literal(rb, 6);
lf->sharpness_level = vp9_rb_read_literal(rb, 3);
// Read in loop filter deltas applied at the MB level based on mode or ref
// frame.
lf->mode_ref_delta_update = 0;
lf->mode_ref_delta_enabled = vp9_rb_read_bit(rb);
if (lf->mode_ref_delta_enabled) {
lf->mode_ref_delta_update = vp9_rb_read_bit(rb);
if (lf->mode_ref_delta_update) {
int i;
for (i = 0; i < MAX_REF_LF_DELTAS; i++)
if (vp9_rb_read_bit(rb))
lf->ref_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
if (vp9_rb_read_bit(rb))
lf->mode_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
}
}
}
static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) {
const int old = *delta_q;
*delta_q = vp9_rb_read_bit(rb) ? vp9_rb_read_signed_literal(rb, 4) : 0;
return old != *delta_q;
}
static void setup_quantization(VP9_COMMON *const cm, MACROBLOCKD *const xd,
struct vp9_read_bit_buffer *rb) {
int update = 0;
cm->base_qindex = vp9_rb_read_literal(rb, QINDEX_BITS);
update |= read_delta_q(rb, &cm->y_dc_delta_q);
update |= read_delta_q(rb, &cm->uv_dc_delta_q);
update |= read_delta_q(rb, &cm->uv_ac_delta_q);
if (update)
vp9_init_dequantizer(cm);
xd->lossless = cm->base_qindex == 0 &&
cm->y_dc_delta_q == 0 &&
cm->uv_dc_delta_q == 0 &&
cm->uv_ac_delta_q == 0;
xd->itxm_add = xd->lossless ? vp9_iwht4x4_add : vp9_idct4x4_add;
}
static INTERP_FILTER read_interp_filter(struct vp9_read_bit_buffer *rb) {
const INTERP_FILTER literal_to_filter[] = { EIGHTTAP_SMOOTH,
EIGHTTAP,
EIGHTTAP_SHARP,
BILINEAR };
return vp9_rb_read_bit(rb) ? SWITCHABLE
: literal_to_filter[vp9_rb_read_literal(rb, 2)];
}
static void read_frame_size(struct vp9_read_bit_buffer *rb,
int *width, int *height) {
const int w = vp9_rb_read_literal(rb, 16) + 1;
const int h = vp9_rb_read_literal(rb, 16) + 1;
*width = w;
*height = h;
}
static void setup_display_size(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
cm->display_width = cm->width;
cm->display_height = cm->height;
if (vp9_rb_read_bit(rb))
read_frame_size(rb, &cm->display_width, &cm->display_height);
}
static void apply_frame_size(VP9D_COMP *pbi, int width, int height) {
VP9_COMMON *cm = &pbi->common;
if (cm->width != width || cm->height != height) {
// Change in frame size.
// TODO(agrange) Don't test width/height, check overall size.
if (width > cm->width || height > cm->height) {
// Rescale frame buffers only if they're not big enough already.
if (vp9_resize_frame_buffers(cm, width, height))
vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
"Failed to allocate frame buffers");
}
cm->width = width;
cm->height = height;
vp9_update_frame_size(cm);
}
if (vp9_realloc_frame_buffer(
get_frame_new_buffer(cm), cm->width, cm->height,
cm->subsampling_x, cm->subsampling_y, VP9_DEC_BORDER_IN_PIXELS,
&cm->frame_bufs[cm->new_fb_idx].raw_frame_buffer, cm->get_fb_cb,
cm->cb_priv)) {
vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
"Failed to allocate frame buffer");
}
}
static void setup_frame_size(VP9D_COMP *pbi,
struct vp9_read_bit_buffer *rb) {
int width, height;
read_frame_size(rb, &width, &height);
apply_frame_size(pbi, width, height);
setup_display_size(&pbi->common, rb);
}
static void setup_frame_size_with_refs(VP9D_COMP *pbi,
struct vp9_read_bit_buffer *rb) {
VP9_COMMON *const cm = &pbi->common;
int width, height;
int found = 0, i;
for (i = 0; i < REFS_PER_FRAME; ++i) {
if (vp9_rb_read_bit(rb)) {
YV12_BUFFER_CONFIG *const buf = cm->frame_refs[i].buf;
width = buf->y_crop_width;
height = buf->y_crop_height;
found = 1;
break;
}
}
if (!found)
read_frame_size(rb, &width, &height);
if (width <= 0 || height <= 0)
vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
"Referenced frame with invalid size");
apply_frame_size(pbi, width, height);
setup_display_size(cm, rb);
}
static void setup_tile_context(VP9D_COMP *const pbi, MACROBLOCKD *const xd,
int tile_row, int tile_col) {
int i;
const int tile_cols = 1 << pbi->common.log2_tile_cols;
xd->mi_stream = pbi->mi_streams[tile_row * tile_cols + tile_col];
for (i = 0; i < MAX_MB_PLANE; ++i) {
xd->above_context[i] = pbi->above_context[i];
}
// see note in alloc_tile_storage().
xd->above_seg_context = pbi->above_seg_context;
}
static void decode_tile(VP9D_COMP *pbi, const TileInfo *const tile,
vp9_reader *r) {
const int num_threads = pbi->oxcf.max_threads;
VP9_COMMON *const cm = &pbi->common;
int mi_row, mi_col;
MACROBLOCKD *xd = &pbi->mb;
if (pbi->do_loopfilter_inline) {
LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
lf_data->frame_buffer = get_frame_new_buffer(cm);
lf_data->cm = cm;
lf_data->xd = pbi->mb;
lf_data->stop = 0;
lf_data->y_only = 0;
vp9_loop_filter_frame_init(cm, cm->lf.filter_level);
}
for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;
mi_row += MI_BLOCK_SIZE) {
// For a SB there are 2 left contexts, each pertaining to a MB row within
vp9_zero(xd->left_context);
vp9_zero(xd->left_seg_context);
for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;
mi_col += MI_BLOCK_SIZE) {
decode_modes_sb(cm, xd, tile, mi_row, mi_col, r, BLOCK_64X64);
}
if (pbi->do_loopfilter_inline) {
const int lf_start = mi_row - MI_BLOCK_SIZE;
LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
// delay the loopfilter by 1 macroblock row.
if (lf_start < 0) continue;
// decoding has completed: finish up the loop filter in this thread.
if (mi_row + MI_BLOCK_SIZE >= tile->mi_row_end) continue;
vp9_worker_sync(&pbi->lf_worker);
lf_data->start = lf_start;
lf_data->stop = mi_row;
if (num_threads > 1) {
vp9_worker_launch(&pbi->lf_worker);
} else {
vp9_worker_execute(&pbi->lf_worker);
}
}
}
if (pbi->do_loopfilter_inline) {
LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
vp9_worker_sync(&pbi->lf_worker);
lf_data->start = lf_data->stop;
lf_data->stop = cm->mi_rows;
vp9_worker_execute(&pbi->lf_worker);
}
}
static void setup_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
int min_log2_tile_cols, max_log2_tile_cols, max_ones;
vp9_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols);
// columns
max_ones = max_log2_tile_cols - min_log2_tile_cols;
cm->log2_tile_cols = min_log2_tile_cols;
while (max_ones-- && vp9_rb_read_bit(rb))
cm->log2_tile_cols++;
// rows
cm->log2_tile_rows = vp9_rb_read_bit(rb);
if (cm->log2_tile_rows)
cm->log2_tile_rows += vp9_rb_read_bit(rb);
}
// Reads the next tile returning its size and adjusting '*data' accordingly
// based on 'is_last'.
static size_t get_tile(const uint8_t *const data_end,
int is_last,
struct vpx_internal_error_info *error_info,
const uint8_t **data) {
size_t size;
if (!is_last) {
if (!read_is_valid(*data, 4, data_end))
vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet or corrupt tile length");
size = read_be32(*data);
*data += 4;
if (size > (size_t)(data_end - *data))
vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet or corrupt tile size");
} else {
size = data_end - *data;
}
return size;
}
typedef struct TileBuffer {
const uint8_t *data;
size_t size;
int col; // only used with multi-threaded decoding
} TileBuffer;
static const uint8_t *decode_tiles(VP9D_COMP *pbi, const uint8_t *data) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
const int aligned_cols = mi_cols_aligned_to_sb(cm->mi_cols);
const int tile_cols = 1 << cm->log2_tile_cols;
const int tile_rows = 1 << cm->log2_tile_rows;
TileBuffer tile_buffers[4][1 << 6];
int tile_row, tile_col;
const uint8_t *const data_end = pbi->source + pbi->source_sz;
const uint8_t *end = NULL;
vp9_reader r;
assert(tile_rows <= 4);
assert(tile_cols <= (1 << 6));
// Note: this memset assumes above_context[0], [1] and [2]
// are allocated as part of the same buffer.
vpx_memset(pbi->above_context[0], 0,
sizeof(*pbi->above_context[0]) * MAX_MB_PLANE * 2 * aligned_cols);
vpx_memset(pbi->above_seg_context, 0,
sizeof(*pbi->above_seg_context) * aligned_cols);
// Load tile data into tile_buffers
for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
const int last_tile = tile_row == tile_rows - 1 &&
tile_col == tile_cols - 1;
const size_t size = get_tile(data_end, last_tile, &cm->error, &data);
TileBuffer *const buf = &tile_buffers[tile_row][tile_col];
buf->data = data;
buf->size = size;
data += size;
}
}
// Decode tiles using data from tile_buffers
for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
const int col = pbi->oxcf.inv_tile_order ? tile_cols - tile_col - 1
: tile_col;
const int last_tile = tile_row == tile_rows - 1 &&
col == tile_cols - 1;
const TileBuffer *const buf = &tile_buffers[tile_row][col];
TileInfo tile;
vp9_tile_init(&tile, cm, tile_row, col);
setup_token_decoder(buf->data, data_end, buf->size, &cm->error, &r);
setup_tile_context(pbi, xd, tile_row, col);
decode_tile(pbi, &tile, &r);
if (last_tile)
end = vp9_reader_find_end(&r);
}
}
return end;
}
static void setup_tile_macroblockd(TileWorkerData *const tile_data) {
MACROBLOCKD *xd = &tile_data->xd;
struct macroblockd_plane *const pd = xd->plane;
int i;
for (i = 0; i < MAX_MB_PLANE; ++i) {
pd[i].dqcoeff = tile_data->dqcoeff[i];
vpx_memset(xd->plane[i].dqcoeff, 0, 64 * 64 * sizeof(int16_t));
}
}
static int tile_worker_hook(void *arg1, void *arg2) {
TileWorkerData *const tile_data = (TileWorkerData*)arg1;
const TileInfo *const tile = (TileInfo*)arg2;
int mi_row, mi_col;
for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;
mi_row += MI_BLOCK_SIZE) {
vp9_zero(tile_data->xd.left_context);
vp9_zero(tile_data->xd.left_seg_context);
for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;
mi_col += MI_BLOCK_SIZE) {
decode_modes_sb(tile_data->cm, &tile_data->xd, tile,
mi_row, mi_col, &tile_data->bit_reader, BLOCK_64X64);
}
}
return !tile_data->xd.corrupted;
}
// sorts in descending order
static int compare_tile_buffers(const void *a, const void *b) {
const TileBuffer *const buf1 = (const TileBuffer*)a;
const TileBuffer *const buf2 = (const TileBuffer*)b;
if (buf1->size < buf2->size) {
return 1;
} else if (buf1->size == buf2->size) {
return 0;
} else {
return -1;
}
}
static const uint8_t *decode_tiles_mt(VP9D_COMP *pbi, const uint8_t *data) {
VP9_COMMON *const cm = &pbi->common;
const uint8_t *bit_reader_end = NULL;
const uint8_t *const data_end = pbi->source + pbi->source_sz;
const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);
const int tile_cols = 1 << cm->log2_tile_cols;
const int tile_rows = 1 << cm->log2_tile_rows;
const int num_workers = MIN(pbi->oxcf.max_threads & ~1, tile_cols);
TileBuffer tile_buffers[1 << 6];
int n;
int final_worker = -1;
assert(tile_cols <= (1 << 6));
assert(tile_rows == 1);
(void)tile_rows;
if (num_workers > pbi->num_tile_workers) {
int i;
CHECK_MEM_ERROR(cm, pbi->tile_workers,
vpx_realloc(pbi->tile_workers,
num_workers * sizeof(*pbi->tile_workers)));
for (i = pbi->num_tile_workers; i < num_workers; ++i) {
VP9Worker *const worker = &pbi->tile_workers[i];
++pbi->num_tile_workers;
vp9_worker_init(worker);
CHECK_MEM_ERROR(cm, worker->data1,
vpx_memalign(32, sizeof(TileWorkerData)));
CHECK_MEM_ERROR(cm, worker->data2, vpx_malloc(sizeof(TileInfo)));
if (i < num_workers - 1 && !vp9_worker_reset(worker)) {
vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
"Tile decoder thread creation failed");
}
}
}
// Reset tile decoding hook
for (n = 0; n < pbi->num_tile_workers; ++n) {
pbi->tile_workers[n].hook = (VP9WorkerHook)tile_worker_hook;
}
// Note: this memset assumes above_context[0], [1] and [2]
// are allocated as part of the same buffer.
vpx_memset(pbi->above_context[0], 0,
sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *
2 * aligned_mi_cols);
vpx_memset(pbi->above_seg_context, 0,
sizeof(*pbi->above_seg_context) * aligned_mi_cols);
// Load tile data into tile_buffers
for (n = 0; n < tile_cols; ++n) {
const size_t size =
get_tile(data_end, n == tile_cols - 1, &cm->error, &data);
TileBuffer *const buf = &tile_buffers[n];
buf->data = data;
buf->size = size;
buf->col = n;
data += size;
}
// Sort the buffers based on size in descending order.
qsort(tile_buffers, tile_cols, sizeof(tile_buffers[0]), compare_tile_buffers);
// Rearrange the tile buffers such that per-tile group the largest, and
// presumably the most difficult, tile will be decoded in the main thread.
// This should help minimize the number of instances where the main thread is
// waiting for a worker to complete.
{
int group_start = 0;
while (group_start < tile_cols) {
const TileBuffer largest = tile_buffers[group_start];
const int group_end = MIN(group_start + num_workers, tile_cols) - 1;
memmove(tile_buffers + group_start, tile_buffers + group_start + 1,
(group_end - group_start) * sizeof(tile_buffers[0]));
tile_buffers[group_end] = largest;
group_start = group_end + 1;
}
}
n = 0;
while (n < tile_cols) {
int i;
for (i = 0; i < num_workers && n < tile_cols; ++i) {
VP9Worker *const worker = &pbi->tile_workers[i];
TileWorkerData *const tile_data = (TileWorkerData*)worker->data1;
TileInfo *const tile = (TileInfo*)worker->data2;
TileBuffer *const buf = &tile_buffers[n];
tile_data->cm = cm;
tile_data->xd = pbi->mb;
tile_data->xd.corrupted = 0;
vp9_tile_init(tile, tile_data->cm, 0, buf->col);
setup_token_decoder(buf->data, data_end, buf->size, &cm->error,
&tile_data->bit_reader);
setup_tile_context(pbi, &tile_data->xd, 0, buf->col);
setup_tile_macroblockd(tile_data);
worker->had_error = 0;
if (i == num_workers - 1 || n == tile_cols - 1) {
vp9_worker_execute(worker);
} else {
vp9_worker_launch(worker);
}
if (buf->col == tile_cols - 1) {
final_worker = i;
}
++n;
}
for (; i > 0; --i) {
VP9Worker *const worker = &pbi->tile_workers[i - 1];
pbi->mb.corrupted |= !vp9_worker_sync(worker);
}
if (final_worker > -1) {
TileWorkerData *const tile_data =
(TileWorkerData*)pbi->tile_workers[final_worker].data1;
bit_reader_end = vp9_reader_find_end(&tile_data->bit_reader);
final_worker = -1;
}
}
return bit_reader_end;
}
static void check_sync_code(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
if (vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_0 ||
vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_1 ||
vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_2) {
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
"Invalid frame sync code");
}
}
static void error_handler(void *data, size_t bit_offset) {
VP9_COMMON *const cm = (VP9_COMMON *)data;
vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, "Truncated packet");
}
#define RESERVED \
if (vp9_rb_read_bit(rb)) \
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, \
"Reserved bit must be unset")
static size_t read_uncompressed_header(VP9D_COMP *pbi,
struct vp9_read_bit_buffer *rb) {
VP9_COMMON *const cm = &pbi->common;
size_t sz;
int i;
cm->last_frame_type = cm->frame_type;
if (vp9_rb_read_literal(rb, 2) != VP9_FRAME_MARKER)
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
"Invalid frame marker");
cm->version = vp9_rb_read_bit(rb);
RESERVED;
cm->show_existing_frame = vp9_rb_read_bit(rb);
if (cm->show_existing_frame) {
// Show an existing frame directly.
const int frame_to_show = cm->ref_frame_map[vp9_rb_read_literal(rb, 3)];
ref_cnt_fb(cm->frame_bufs, &cm->new_fb_idx, frame_to_show);
pbi->refresh_frame_flags = 0;
cm->lf.filter_level = 0;
cm->show_frame = 1;
return 0;
}
cm->frame_type = (FRAME_TYPE) vp9_rb_read_bit(rb);
cm->show_frame = vp9_rb_read_bit(rb);
cm->error_resilient_mode = vp9_rb_read_bit(rb);
if (cm->frame_type == KEY_FRAME) {
check_sync_code(cm, rb);
cm->color_space = vp9_rb_read_literal(rb, 3); // colorspace
if (cm->color_space != SRGB) {
vp9_rb_read_bit(rb); // [16,235] (including xvycc) vs [0,255] range
if (cm->version == 1) {
cm->subsampling_x = vp9_rb_read_bit(rb);
cm->subsampling_y = vp9_rb_read_bit(rb);
vp9_rb_read_bit(rb); // has extra plane
} else {
cm->subsampling_y = cm->subsampling_x = 1;
}
} else {
if (cm->version == 1) {
cm->subsampling_y = cm->subsampling_x = 0;
vp9_rb_read_bit(rb); // has extra plane
} else {
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
"RGB not supported in profile 0");
}
}
pbi->refresh_frame_flags = (1 << REF_FRAMES) - 1;
for (i = 0; i < REFS_PER_FRAME; ++i) {
cm->frame_refs[i].idx = cm->new_fb_idx;
cm->frame_refs[i].buf = get_frame_new_buffer(cm);
}
setup_frame_size(pbi, rb);
} else {
cm->intra_only = cm->show_frame ? 0 : vp9_rb_read_bit(rb);
cm->reset_frame_context = cm->error_resilient_mode ?
0 : vp9_rb_read_literal(rb, 2);
if (cm->intra_only) {
check_sync_code(cm, rb);
pbi->refresh_frame_flags = vp9_rb_read_literal(rb, REF_FRAMES);
setup_frame_size(pbi, rb);
} else {
pbi->refresh_frame_flags = vp9_rb_read_literal(rb, REF_FRAMES);
for (i = 0; i < REFS_PER_FRAME; ++i) {
const int ref = vp9_rb_read_literal(rb, REF_FRAMES_LOG2);
const int idx = cm->ref_frame_map[ref];
cm->frame_refs[i].idx = idx;
cm->frame_refs[i].buf = &cm->frame_bufs[idx].buf;
cm->ref_frame_sign_bias[LAST_FRAME + i] = vp9_rb_read_bit(rb);
}
setup_frame_size_with_refs(pbi, rb);
cm->allow_high_precision_mv = vp9_rb_read_bit(rb);
cm->interp_filter = read_interp_filter(rb);
for (i = 0; i < REFS_PER_FRAME; ++i) {
RefBuffer *const ref_buf = &cm->frame_refs[i];
vp9_setup_scale_factors_for_frame(&ref_buf->sf,
ref_buf->buf->y_crop_width,
ref_buf->buf->y_crop_height,
cm->width, cm->height);
if (vp9_is_scaled(&ref_buf->sf))
vp9_extend_frame_borders(ref_buf->buf,
cm->subsampling_x, cm->subsampling_y);
}
}
}
if (!cm->error_resilient_mode) {
cm->coding_use_prev_mi = 1;
cm->refresh_frame_context = vp9_rb_read_bit(rb);
cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb);
} else {
cm->coding_use_prev_mi = 0;
cm->refresh_frame_context = 0;
cm->frame_parallel_decoding_mode = 1;
}
// This flag will be overridden by the call to vp9_setup_past_independence
// below, forcing the use of context 0 for those frame types.
cm->frame_context_idx = vp9_rb_read_literal(rb, FRAME_CONTEXTS_LOG2);
if (frame_is_intra_only(cm) || cm->error_resilient_mode)
vp9_setup_past_independence(cm);
setup_loopfilter(&cm->lf, rb);
setup_quantization(cm, &pbi->mb, rb);
setup_segmentation(&cm->seg, rb);
setup_tile_info(cm, rb);
sz = vp9_rb_read_literal(rb, 16);
if (sz == 0)
vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
"Invalid header size");
return sz;
}
static int read_compressed_header(VP9D_COMP *pbi, const uint8_t *data,
size_t partition_size) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
FRAME_CONTEXT *const fc = &cm->fc;
vp9_reader r;
int k;
if (vp9_reader_init(&r, data, partition_size))
vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
"Failed to allocate bool decoder 0");
cm->tx_mode = xd->lossless ? ONLY_4X4 : read_tx_mode(&r);
if (cm->tx_mode == TX_MODE_SELECT)
read_tx_mode_probs(&fc->tx_probs, &r);
read_coef_probs(fc, cm->tx_mode, &r);
for (k = 0; k < SKIP_CONTEXTS; ++k)
vp9_diff_update_prob(&r, &fc->skip_probs[k]);
if (!frame_is_intra_only(cm)) {
nmv_context *const nmvc = &fc->nmvc;
int i, j;
read_inter_mode_probs(fc, &r);
if (cm->interp_filter == SWITCHABLE)
read_switchable_interp_probs(fc, &r);
for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
vp9_diff_update_prob(&r, &fc->intra_inter_prob[i]);
cm->reference_mode = read_reference_mode(cm, &r);
read_reference_mode_probs(cm, &r);
for (j = 0; j < BLOCK_SIZE_GROUPS; j++)
for (i = 0; i < INTRA_MODES - 1; ++i)
vp9_diff_update_prob(&r, &fc->y_mode_prob[j][i]);
for (j = 0; j < PARTITION_CONTEXTS; ++j)
for (i = 0; i < PARTITION_TYPES - 1; ++i)
vp9_diff_update_prob(&r, &fc->partition_prob[j][i]);
read_mv_probs(nmvc, cm->allow_high_precision_mv, &r);
}
return vp9_reader_has_error(&r);
}
void vp9_init_dequantizer(VP9_COMMON *cm) {
int q;
for (q = 0; q < QINDEX_RANGE; q++) {
cm->y_dequant[q][0] = vp9_dc_quant(q, cm->y_dc_delta_q);
cm->y_dequant[q][1] = vp9_ac_quant(q, 0);
cm->uv_dequant[q][0] = vp9_dc_quant(q, cm->uv_dc_delta_q);
cm->uv_dequant[q][1] = vp9_ac_quant(q, cm->uv_ac_delta_q);
}
}
#ifdef NDEBUG
#define debug_check_frame_counts(cm) (void)0
#else // !NDEBUG
// Counts should only be incremented when frame_parallel_decoding_mode and
// error_resilient_mode are disabled.
static void debug_check_frame_counts(const VP9_COMMON *const cm) {
FRAME_COUNTS zero_counts;
vp9_zero(zero_counts);
assert(cm->frame_parallel_decoding_mode || cm->error_resilient_mode);
assert(!memcmp(cm->counts.y_mode, zero_counts.y_mode,
sizeof(cm->counts.y_mode)));
assert(!memcmp(cm->counts.uv_mode, zero_counts.uv_mode,
sizeof(cm->counts.uv_mode)));
assert(!memcmp(cm->counts.partition, zero_counts.partition,
sizeof(cm->counts.partition)));
assert(!memcmp(cm->counts.coef, zero_counts.coef,
sizeof(cm->counts.coef)));
assert(!memcmp(cm->counts.eob_branch, zero_counts.eob_branch,
sizeof(cm->counts.eob_branch)));
assert(!memcmp(cm->counts.switchable_interp, zero_counts.switchable_interp,
sizeof(cm->counts.switchable_interp)));
assert(!memcmp(cm->counts.inter_mode, zero_counts.inter_mode,
sizeof(cm->counts.inter_mode)));
assert(!memcmp(cm->counts.intra_inter, zero_counts.intra_inter,
sizeof(cm->counts.intra_inter)));
assert(!memcmp(cm->counts.comp_inter, zero_counts.comp_inter,
sizeof(cm->counts.comp_inter)));
assert(!memcmp(cm->counts.single_ref, zero_counts.single_ref,
sizeof(cm->counts.single_ref)));
assert(!memcmp(cm->counts.comp_ref, zero_counts.comp_ref,
sizeof(cm->counts.comp_ref)));
assert(!memcmp(&cm->counts.tx, &zero_counts.tx, sizeof(cm->counts.tx)));
assert(!memcmp(cm->counts.skip, zero_counts.skip, sizeof(cm->counts.skip)));
assert(!memcmp(&cm->counts.mv, &zero_counts.mv, sizeof(cm->counts.mv)));
}
#endif // NDEBUG
int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) {
int i;
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
const uint8_t *data = pbi->source;
const uint8_t *const data_end = pbi->source + pbi->source_sz;
struct vp9_read_bit_buffer rb = { data, data_end, 0, cm, error_handler };
const size_t first_partition_size = read_uncompressed_header(pbi, &rb);
const int keyframe = cm->frame_type == KEY_FRAME;
const int tile_rows = 1 << cm->log2_tile_rows;
const int tile_cols = 1 << cm->log2_tile_cols;
YV12_BUFFER_CONFIG *const new_fb = get_frame_new_buffer(cm);
xd->cur_buf = new_fb;
if (!first_partition_size) {
// showing a frame directly
*p_data_end = data + 1;
return 0;
}
if (!pbi->decoded_key_frame && !keyframe)
return -1;
data += vp9_rb_bytes_read(&rb);
if (!read_is_valid(data, first_partition_size, data_end))
vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet or corrupt header length");
pbi->do_loopfilter_inline =
(cm->log2_tile_rows | cm->log2_tile_cols) == 0 && cm->lf.filter_level;
if (pbi->do_loopfilter_inline && pbi->lf_worker.data1 == NULL) {
CHECK_MEM_ERROR(cm, pbi->lf_worker.data1, vpx_malloc(sizeof(LFWorkerData)));
pbi->lf_worker.hook = (VP9WorkerHook)vp9_loop_filter_worker;
if (pbi->oxcf.max_threads > 1 && !vp9_worker_reset(&pbi->lf_worker)) {
vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
"Loop filter thread creation failed");
}
}
alloc_tile_storage(pbi, tile_rows, tile_cols);
xd->mode_info_stride = cm->mode_info_stride;
if (cm->coding_use_prev_mi)
set_prev_mi(cm);
else
cm->prev_mi = NULL;
setup_plane_dequants(cm, xd, cm->base_qindex);
vp9_setup_block_planes(xd, cm->subsampling_x, cm->subsampling_y);
cm->fc = cm->frame_contexts[cm->frame_context_idx];
vp9_zero(cm->counts);
for (i = 0; i < MAX_MB_PLANE; ++i)
vpx_memset(xd->plane[i].dqcoeff, 0, 64 * 64 * sizeof(int16_t));
xd->corrupted = 0;
new_fb->corrupted = read_compressed_header(pbi, data, first_partition_size);
// TODO(jzern): remove frame_parallel_decoding_mode restriction for
// single-frame tile decoding.
if (pbi->oxcf.max_threads > 1 && tile_rows == 1 && tile_cols > 1 &&
cm->frame_parallel_decoding_mode) {
*p_data_end = decode_tiles_mt(pbi, data + first_partition_size);
} else {
*p_data_end = decode_tiles(pbi, data + first_partition_size);
}
new_fb->corrupted |= xd->corrupted;
if (!pbi->decoded_key_frame) {
if (keyframe && !new_fb->corrupted)
pbi->decoded_key_frame = 1;
else
vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
"A stream must start with a complete key frame");
}
if (!cm->error_resilient_mode && !cm->frame_parallel_decoding_mode) {
vp9_adapt_coef_probs(cm);
if (!frame_is_intra_only(cm)) {
vp9_adapt_mode_probs(cm);
vp9_adapt_mv_probs(cm, cm->allow_high_precision_mv);
}
} else {
debug_check_frame_counts(cm);
}
if (cm->refresh_frame_context)
cm->frame_contexts[cm->frame_context_idx] = cm->fc;
return 0;
}
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