87ee34aacb
Removing block index (ib) parameter from get_tx_type_{8x8, 16x16} functions. Change-Id: Ia213335aae7a7cb027f97b9cc9b04519840250f1
1196 lines
38 KiB
C
1196 lines
38 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <assert.h>
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#include "./vp9_rtcd.h"
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#include "vpx_mem/vpx_mem.h"
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#include "vpx_scale/vpx_scale.h"
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#include "vp9/common/vp9_extend.h"
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#include "vp9/common/vp9_modecont.h"
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#include "vp9/common/vp9_common.h"
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#include "vp9/common/vp9_reconintra.h"
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#include "vp9/common/vp9_reconinter.h"
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#include "vp9/common/vp9_entropy.h"
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#include "vp9/common/vp9_alloccommon.h"
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#include "vp9/common/vp9_entropymode.h"
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#include "vp9/common/vp9_quant_common.h"
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#include "vp9/common/vp9_seg_common.h"
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#include "vp9/common/vp9_tile_common.h"
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#include "vp9/decoder/vp9_dboolhuff.h"
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#include "vp9/decoder/vp9_decodframe.h"
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#include "vp9/decoder/vp9_detokenize.h"
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#include "vp9/decoder/vp9_decodemv.h"
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#include "vp9/decoder/vp9_onyxd_int.h"
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#include "vp9/decoder/vp9_read_bit_buffer.h"
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// #define DEC_DEBUG
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#ifdef DEC_DEBUG
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int dec_debug = 0;
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#endif
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static int read_be32(const uint8_t *p) {
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return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
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}
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// len == 0 is not allowed
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static int read_is_valid(const uint8_t *start, size_t len,
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const uint8_t *end) {
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return start + len > start && start + len <= end;
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}
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static void setup_txfm_mode(VP9_COMMON *pc, int lossless, vp9_reader *r) {
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if (lossless) {
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pc->txfm_mode = ONLY_4X4;
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} else {
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pc->txfm_mode = vp9_read_literal(r, 2);
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if (pc->txfm_mode == ALLOW_32X32)
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pc->txfm_mode += vp9_read_bit(r);
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if (pc->txfm_mode == TX_MODE_SELECT) {
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int i, j;
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for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
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for (j = 0; j < TX_SIZE_MAX_SB - 3; ++j) {
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if (vp9_read(r, VP9_MODE_UPDATE_PROB))
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pc->fc.tx_probs_8x8p[i][j] =
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vp9_read_prob_diff_update(r, pc->fc.tx_probs_8x8p[i][j]);
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}
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}
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for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
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for (j = 0; j < TX_SIZE_MAX_SB - 2; ++j) {
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if (vp9_read(r, VP9_MODE_UPDATE_PROB))
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pc->fc.tx_probs_16x16p[i][j] =
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vp9_read_prob_diff_update(r, pc->fc.tx_probs_16x16p[i][j]);
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}
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}
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for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
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for (j = 0; j < TX_SIZE_MAX_SB - 1; ++j) {
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if (vp9_read(r, VP9_MODE_UPDATE_PROB))
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pc->fc.tx_probs_32x32p[i][j] =
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vp9_read_prob_diff_update(r, pc->fc.tx_probs_32x32p[i][j]);
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}
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}
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}
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}
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}
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static int get_unsigned_bits(unsigned int num_values) {
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int cat = 0;
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if (num_values <= 1)
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return 0;
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num_values--;
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while (num_values > 0) {
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cat++;
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num_values >>= 1;
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}
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return cat;
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}
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static int inv_recenter_nonneg(int v, int m) {
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if (v > 2 * m)
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return v;
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return v % 2 ? m - (v + 1) / 2 : m + v / 2;
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}
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static int decode_uniform(vp9_reader *r, int n) {
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int v;
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const int l = get_unsigned_bits(n);
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const int m = (1 << l) - n;
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if (!l)
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return 0;
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v = vp9_read_literal(r, l - 1);
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return v < m ? v : (v << 1) - m + vp9_read_bit(r);
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}
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static int decode_term_subexp(vp9_reader *r, int k, int num_syms) {
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int i = 0, mk = 0, word;
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while (1) {
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const int b = i ? k + i - 1 : k;
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const int a = 1 << b;
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if (num_syms <= mk + 3 * a) {
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word = decode_uniform(r, num_syms - mk) + mk;
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break;
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} else {
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if (vp9_read_bit(r)) {
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i++;
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mk += a;
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} else {
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word = vp9_read_literal(r, b) + mk;
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break;
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}
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}
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}
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return word;
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}
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static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) {
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const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max));
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return data > max ? max : data;
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}
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static int merge_index(int v, int n, int modulus) {
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int max1 = (n - 1 - modulus / 2) / modulus + 1;
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if (v < max1) {
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v = v * modulus + modulus / 2;
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} else {
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int w;
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v -= max1;
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w = v;
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v += (v + modulus - modulus / 2) / modulus;
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while (v % modulus == modulus / 2 ||
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w != v - (v + modulus - modulus / 2) / modulus) v++;
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}
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return v;
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}
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static int inv_remap_prob(int v, int m) {
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const int n = 255;
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v = merge_index(v, n - 1, MODULUS_PARAM);
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m--;
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if ((m << 1) <= n) {
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return 1 + inv_recenter_nonneg(v + 1, m);
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} else {
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return n - inv_recenter_nonneg(v + 1, n - 1 - m);
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}
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}
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vp9_prob vp9_read_prob_diff_update(vp9_reader *r, int oldp) {
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int delp = decode_term_subexp(r, SUBEXP_PARAM, 255);
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return (vp9_prob)inv_remap_prob(delp, oldp);
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}
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void vp9_init_dequantizer(VP9_COMMON *pc) {
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int q;
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for (q = 0; q < QINDEX_RANGE; q++) {
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// DC value
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pc->y_dequant[q][0] = vp9_dc_quant(q, pc->y_dc_delta_q);
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pc->uv_dequant[q][0] = vp9_dc_quant(q, pc->uv_dc_delta_q);
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// AC values
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pc->y_dequant[q][1] = vp9_ac_quant(q, 0);
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pc->uv_dequant[q][1] = vp9_ac_quant(q, pc->uv_ac_delta_q);
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}
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}
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static void mb_init_dequantizer(VP9_COMMON *pc, MACROBLOCKD *xd) {
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int i;
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const int segment_id = xd->mode_info_context->mbmi.segment_id;
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xd->q_index = vp9_get_qindex(xd, segment_id, pc->base_qindex);
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xd->plane[0].dequant = pc->y_dequant[xd->q_index];
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for (i = 1; i < MAX_MB_PLANE; i++)
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xd->plane[i].dequant = pc->uv_dequant[xd->q_index];
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}
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static void decode_block(int plane, int block, BLOCK_SIZE_TYPE bsize,
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int ss_txfrm_size, void *arg) {
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MACROBLOCKD* const xd = arg;
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struct macroblockd_plane *pd = &xd->plane[plane];
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int16_t* const qcoeff = BLOCK_OFFSET(pd->qcoeff, block, 16);
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const int stride = pd->dst.stride;
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const int raster_block = txfrm_block_to_raster_block(xd, bsize, plane,
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block, ss_txfrm_size);
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uint8_t* const dst = raster_block_offset_uint8(xd, bsize, plane,
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raster_block,
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pd->dst.buf, stride);
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TX_TYPE tx_type;
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switch (ss_txfrm_size / 2) {
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case TX_4X4:
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tx_type = plane == 0 ? get_tx_type_4x4(xd, raster_block) : DCT_DCT;
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if (tx_type == DCT_DCT)
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xd->itxm_add(qcoeff, dst, stride, pd->eobs[block]);
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else
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vp9_iht_add_c(tx_type, qcoeff, dst, stride, pd->eobs[block]);
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break;
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case TX_8X8:
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tx_type = plane == 0 ? get_tx_type_8x8(xd) : DCT_DCT;
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vp9_iht_add_8x8_c(tx_type, qcoeff, dst, stride, pd->eobs[block]);
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break;
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case TX_16X16:
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tx_type = plane == 0 ? get_tx_type_16x16(xd) : DCT_DCT;
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vp9_iht_add_16x16_c(tx_type, qcoeff, dst, stride, pd->eobs[block]);
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break;
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case TX_32X32:
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vp9_idct_add_32x32(qcoeff, dst, stride, pd->eobs[block]);
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break;
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}
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}
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static void decode_block_intra(int plane, int block, BLOCK_SIZE_TYPE bsize,
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int ss_txfrm_size, void *arg) {
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MACROBLOCKD* const xd = arg;
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struct macroblockd_plane *pd = &xd->plane[plane];
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const int raster_block = txfrm_block_to_raster_block(xd, bsize, plane,
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block, ss_txfrm_size);
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uint8_t* const dst = raster_block_offset_uint8(xd, bsize, plane,
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raster_block,
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pd->dst.buf, pd->dst.stride);
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const TX_SIZE tx_size = (TX_SIZE)(ss_txfrm_size / 2);
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int b_mode;
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int plane_b_size;
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const int tx_ib = raster_block >> tx_size;
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const int mode = plane == 0 ? xd->mode_info_context->mbmi.mode
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: xd->mode_info_context->mbmi.uv_mode;
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if (plane == 0 && xd->mode_info_context->mbmi.sb_type < BLOCK_SIZE_SB8X8) {
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assert(bsize == BLOCK_SIZE_SB8X8);
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b_mode = xd->mode_info_context->bmi[raster_block].as_mode.first;
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} else {
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b_mode = mode;
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}
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if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0)
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extend_for_intra(xd, plane, block, bsize, ss_txfrm_size);
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plane_b_size = b_width_log2(bsize) - pd->subsampling_x;
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vp9_predict_intra_block(xd, tx_ib, plane_b_size, tx_size, b_mode,
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dst, pd->dst.stride);
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// Early exit if there are no coefficients
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if (xd->mode_info_context->mbmi.mb_skip_coeff)
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return;
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decode_block(plane, block, bsize, ss_txfrm_size, arg);
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}
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static void decode_atom(VP9D_COMP *pbi, MACROBLOCKD *xd,
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int mi_row, int mi_col,
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vp9_reader *r, BLOCK_SIZE_TYPE bsize) {
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MB_MODE_INFO *const mbmi = &xd->mode_info_context->mbmi;
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assert(mbmi->ref_frame[0] != INTRA_FRAME);
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vp9_setup_interp_filters(xd, mbmi->interp_filter, &pbi->common);
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// prediction
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vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);
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if (mbmi->mb_skip_coeff) {
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vp9_reset_sb_tokens_context(xd, bsize);
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} else {
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if (xd->segmentation_enabled)
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mb_init_dequantizer(&pbi->common, xd);
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if (!vp9_reader_has_error(r))
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vp9_decode_tokens(pbi, r, bsize);
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foreach_transformed_block(xd, bsize, decode_block, xd);
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}
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}
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static void decode_sb_intra(VP9D_COMP *pbi, MACROBLOCKD *xd,
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int mi_row, int mi_col,
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vp9_reader *r, BLOCK_SIZE_TYPE bsize) {
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MB_MODE_INFO *const mbmi = &xd->mode_info_context->mbmi;
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if (mbmi->mb_skip_coeff) {
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vp9_reset_sb_tokens_context(xd, bsize);
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} else {
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if (xd->segmentation_enabled)
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mb_init_dequantizer(&pbi->common, xd);
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if (!vp9_reader_has_error(r))
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vp9_decode_tokens(pbi, r, bsize);
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}
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foreach_transformed_block(xd, bsize, decode_block_intra, xd);
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}
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static void decode_sb(VP9D_COMP *pbi, MACROBLOCKD *xd, int mi_row, int mi_col,
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vp9_reader *r, BLOCK_SIZE_TYPE bsize) {
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const int bwl = mi_width_log2(bsize), bhl = mi_height_log2(bsize);
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const int bw = 1 << bwl, bh = 1 << bhl;
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int n, eobtotal;
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VP9_COMMON *const pc = &pbi->common;
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MODE_INFO *const mi = xd->mode_info_context;
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MB_MODE_INFO *const mbmi = &mi->mbmi;
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const int mis = pc->mode_info_stride;
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assert(mbmi->sb_type == bsize);
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assert(mbmi->ref_frame[0] != INTRA_FRAME);
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vp9_setup_interp_filters(xd, mbmi->interp_filter, pc);
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// generate prediction
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vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);
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if (mbmi->mb_skip_coeff) {
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vp9_reset_sb_tokens_context(xd, bsize);
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} else {
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// re-initialize macroblock dequantizer before detokenization
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if (xd->segmentation_enabled)
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mb_init_dequantizer(pc, xd);
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// dequantization and idct
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eobtotal = vp9_decode_tokens(pbi, r, bsize);
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if (eobtotal == 0) { // skip loopfilter
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for (n = 0; n < bw * bh; n++) {
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const int x_idx = n & (bw - 1), y_idx = n >> bwl;
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if (mi_col + x_idx < pc->mi_cols && mi_row + y_idx < pc->mi_rows)
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mi[y_idx * mis + x_idx].mbmi.mb_skip_coeff = 1;
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}
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} else {
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foreach_transformed_block(xd, bsize, decode_block, xd);
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}
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}
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}
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static void set_offsets(VP9D_COMP *pbi, BLOCK_SIZE_TYPE bsize,
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int mi_row, int mi_col) {
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VP9_COMMON *const cm = &pbi->common;
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MACROBLOCKD *const xd = &pbi->mb;
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const int bh = 1 << mi_height_log2(bsize);
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const int bw = 1 << mi_width_log2(bsize);
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const int mi_idx = mi_row * cm->mode_info_stride + mi_col;
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int i;
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xd->mode_info_context = cm->mi + mi_idx;
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xd->mode_info_context->mbmi.sb_type = bsize;
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// Special case: if prev_mi is NULL, the previous mode info context
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// cannot be used.
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xd->prev_mode_info_context = cm->prev_mi ? cm->prev_mi + mi_idx : NULL;
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for (i = 0; i < MAX_MB_PLANE; i++) {
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struct macroblockd_plane *pd = &xd->plane[i];
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pd->above_context = cm->above_context[i] +
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(mi_col * 2 >> pd->subsampling_x);
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pd->left_context = cm->left_context[i] +
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(((mi_row * 2) & 15) >> pd->subsampling_y);
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}
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xd->above_seg_context = cm->above_seg_context + mi_col;
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xd->left_seg_context = cm->left_seg_context + (mi_row & MI_MASK);
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// Distance of Mb to the various image edges. These are specified to 8th pel
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// as they are always compared to values that are in 1/8th pel units
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set_mi_row_col(cm, xd, mi_row, bh, mi_col, bw);
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setup_dst_planes(xd, &cm->yv12_fb[cm->new_fb_idx], mi_row, mi_col);
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}
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static void set_refs(VP9D_COMP *pbi, int mi_row, int mi_col) {
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VP9_COMMON *const cm = &pbi->common;
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MACROBLOCKD *const xd = &pbi->mb;
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MB_MODE_INFO *const mbmi = &xd->mode_info_context->mbmi;
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// Select the appropriate reference frame for this MB
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const int fb_idx = cm->active_ref_idx[mbmi->ref_frame[0] - 1];
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const YV12_BUFFER_CONFIG *cfg = &cm->yv12_fb[fb_idx];
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xd->scale_factor[0] = cm->active_ref_scale[mbmi->ref_frame[0] - 1];
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xd->scale_factor_uv[0] = cm->active_ref_scale[mbmi->ref_frame[0] - 1];
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setup_pre_planes(xd, cfg, NULL, mi_row, mi_col, xd->scale_factor,
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xd->scale_factor_uv);
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xd->corrupted |= cfg->corrupted;
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if (mbmi->ref_frame[1] > INTRA_FRAME) {
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// Select the appropriate reference frame for this MB
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const int second_fb_idx = cm->active_ref_idx[mbmi->ref_frame[1] - 1];
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const YV12_BUFFER_CONFIG *second_cfg = &cm->yv12_fb[second_fb_idx];
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xd->scale_factor[1] = cm->active_ref_scale[mbmi->ref_frame[1] - 1];
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xd->scale_factor_uv[1] = cm->active_ref_scale[mbmi->ref_frame[1] - 1];
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setup_pre_planes(xd, NULL, second_cfg, mi_row, mi_col, xd->scale_factor,
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xd->scale_factor_uv);
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xd->corrupted |= second_cfg->corrupted;
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}
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}
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static void decode_modes_b(VP9D_COMP *pbi, int mi_row, int mi_col,
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vp9_reader *r, BLOCK_SIZE_TYPE bsize) {
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MACROBLOCKD *const xd = &pbi->mb;
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if (bsize < BLOCK_SIZE_SB8X8)
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if (xd->ab_index > 0)
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return;
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set_offsets(pbi, bsize, mi_row, mi_col);
|
|
vp9_decode_mb_mode_mv(pbi, xd, mi_row, mi_col, r);
|
|
|
|
if (xd->mode_info_context->mbmi.ref_frame[0] == INTRA_FRAME) {
|
|
decode_sb_intra(pbi, xd, mi_row, mi_col, r, (bsize < BLOCK_SIZE_SB8X8) ?
|
|
BLOCK_SIZE_SB8X8 : bsize);
|
|
} else {
|
|
set_refs(pbi, mi_row, mi_col);
|
|
if (bsize < BLOCK_SIZE_SB8X8)
|
|
decode_atom(pbi, xd, mi_row, mi_col, r, BLOCK_SIZE_SB8X8);
|
|
else
|
|
decode_sb(pbi, xd, mi_row, mi_col, r, bsize);
|
|
}
|
|
xd->corrupted |= vp9_reader_has_error(r);
|
|
}
|
|
|
|
static void decode_modes_sb(VP9D_COMP *pbi, int mi_row, int mi_col,
|
|
vp9_reader* r, BLOCK_SIZE_TYPE bsize) {
|
|
VP9_COMMON *const pc = &pbi->common;
|
|
MACROBLOCKD *const xd = &pbi->mb;
|
|
int bs = (1 << mi_width_log2(bsize)) / 2, n;
|
|
PARTITION_TYPE partition = PARTITION_NONE;
|
|
BLOCK_SIZE_TYPE subsize;
|
|
|
|
if (mi_row >= pc->mi_rows || mi_col >= pc->mi_cols)
|
|
return;
|
|
|
|
if (bsize < BLOCK_SIZE_SB8X8)
|
|
if (xd->ab_index != 0)
|
|
return;
|
|
|
|
if (bsize >= BLOCK_SIZE_SB8X8) {
|
|
int pl;
|
|
int idx = check_bsize_coverage(pc, xd, mi_row, mi_col, bsize);
|
|
// read the partition information
|
|
xd->left_seg_context = pc->left_seg_context + (mi_row & MI_MASK);
|
|
xd->above_seg_context = pc->above_seg_context + mi_col;
|
|
pl = partition_plane_context(xd, bsize);
|
|
|
|
if (idx == 0)
|
|
partition = treed_read(r, vp9_partition_tree,
|
|
pc->fc.partition_prob[pc->frame_type][pl]);
|
|
else if (idx > 0 &&
|
|
!vp9_read(r, pc->fc.partition_prob[pc->frame_type][pl][idx]))
|
|
partition = (idx == 1) ? PARTITION_HORZ : PARTITION_VERT;
|
|
else
|
|
partition = PARTITION_SPLIT;
|
|
|
|
pc->fc.partition_counts[pl][partition]++;
|
|
}
|
|
|
|
subsize = get_subsize(bsize, partition);
|
|
*(get_sb_index(xd, subsize)) = 0;
|
|
|
|
switch (partition) {
|
|
case PARTITION_NONE:
|
|
decode_modes_b(pbi, mi_row, mi_col, r, subsize);
|
|
break;
|
|
case PARTITION_HORZ:
|
|
decode_modes_b(pbi, mi_row, mi_col, r, subsize);
|
|
*(get_sb_index(xd, subsize)) = 1;
|
|
if (mi_row + bs < pc->mi_rows)
|
|
decode_modes_b(pbi, mi_row + bs, mi_col, r, subsize);
|
|
break;
|
|
case PARTITION_VERT:
|
|
decode_modes_b(pbi, mi_row, mi_col, r, subsize);
|
|
*(get_sb_index(xd, subsize)) = 1;
|
|
if (mi_col + bs < pc->mi_cols)
|
|
decode_modes_b(pbi, mi_row, mi_col + bs, r, subsize);
|
|
break;
|
|
case PARTITION_SPLIT:
|
|
for (n = 0; n < 4; n++) {
|
|
int j = n >> 1, i = n & 0x01;
|
|
*(get_sb_index(xd, subsize)) = n;
|
|
decode_modes_sb(pbi, mi_row + j * bs, mi_col + i * bs, r, subsize);
|
|
}
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
// update partition context
|
|
if (bsize >= BLOCK_SIZE_SB8X8 &&
|
|
(bsize == BLOCK_SIZE_SB8X8 || partition != PARTITION_SPLIT)) {
|
|
set_partition_seg_context(pc, xd, mi_row, mi_col);
|
|
update_partition_context(xd, subsize, bsize);
|
|
}
|
|
}
|
|
|
|
static void setup_token_decoder(VP9D_COMP *pbi,
|
|
const uint8_t *data, size_t read_size,
|
|
vp9_reader *r) {
|
|
VP9_COMMON *pc = &pbi->common;
|
|
const uint8_t *data_end = pbi->source + pbi->source_sz;
|
|
|
|
// 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(&pc->error, VPX_CODEC_CORRUPT_FRAME,
|
|
"Truncated packet or corrupt tile length");
|
|
|
|
if (vp9_reader_init(r, data, read_size))
|
|
vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
|
|
"Failed to allocate bool decoder %d", 1);
|
|
}
|
|
|
|
static void read_coef_probs_common(FRAME_CONTEXT *fc, TX_SIZE tx_size,
|
|
vp9_reader *r) {
|
|
vp9_coeff_probs_model *coef_probs = fc->coef_probs[tx_size];
|
|
|
|
if (vp9_read_bit(r)) {
|
|
int i, j, k, l, m;
|
|
for (i = 0; i < BLOCK_TYPES; i++) {
|
|
for (j = 0; j < REF_TYPES; j++) {
|
|
for (k = 0; k < COEF_BANDS; k++) {
|
|
for (l = 0; l < PREV_COEF_CONTEXTS; l++) {
|
|
if (l >= 3 && k == 0)
|
|
continue;
|
|
|
|
for (m = 0; m < UNCONSTRAINED_NODES; m++) {
|
|
vp9_prob *const p = coef_probs[i][j][k][l] + m;
|
|
|
|
if (vp9_read(r, VP9_COEF_UPDATE_PROB))
|
|
*p = vp9_read_prob_diff_update(r, *p);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void read_coef_probs(VP9D_COMP *pbi, vp9_reader *r) {
|
|
const TXFM_MODE txfm_mode = pbi->common.txfm_mode;
|
|
FRAME_CONTEXT *const fc = &pbi->common.fc;
|
|
|
|
read_coef_probs_common(fc, TX_4X4, r);
|
|
|
|
if (txfm_mode > ONLY_4X4)
|
|
read_coef_probs_common(fc, TX_8X8, r);
|
|
|
|
if (txfm_mode > ALLOW_8X8)
|
|
read_coef_probs_common(fc, TX_16X16, r);
|
|
|
|
if (txfm_mode > ALLOW_16X16)
|
|
read_coef_probs_common(fc, TX_32X32, r);
|
|
}
|
|
|
|
static void setup_segmentation(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) {
|
|
int i, j;
|
|
|
|
VP9_COMMON *const cm = &pbi->common;
|
|
MACROBLOCKD *const xd = &pbi->mb;
|
|
|
|
xd->update_mb_segmentation_map = 0;
|
|
xd->update_mb_segmentation_data = 0;
|
|
|
|
xd->segmentation_enabled = vp9_rb_read_bit(rb);
|
|
if (!xd->segmentation_enabled)
|
|
return;
|
|
|
|
// Segmentation map update
|
|
xd->update_mb_segmentation_map = vp9_rb_read_bit(rb);
|
|
if (xd->update_mb_segmentation_map) {
|
|
for (i = 0; i < MB_SEG_TREE_PROBS; i++)
|
|
xd->mb_segment_tree_probs[i] = vp9_rb_read_bit(rb) ?
|
|
vp9_rb_read_literal(rb, 8) : MAX_PROB;
|
|
|
|
cm->temporal_update = vp9_rb_read_bit(rb);
|
|
if (cm->temporal_update) {
|
|
for (i = 0; i < PREDICTION_PROBS; i++)
|
|
cm->segment_pred_probs[i] = vp9_rb_read_bit(rb) ?
|
|
vp9_rb_read_literal(rb, 8) : MAX_PROB;
|
|
} else {
|
|
for (i = 0; i < PREDICTION_PROBS; i++)
|
|
cm->segment_pred_probs[i] = MAX_PROB;
|
|
}
|
|
}
|
|
|
|
// Segmentation data update
|
|
xd->update_mb_segmentation_data = vp9_rb_read_bit(rb);
|
|
if (xd->update_mb_segmentation_data) {
|
|
xd->mb_segment_abs_delta = vp9_rb_read_bit(rb);
|
|
|
|
vp9_clearall_segfeatures(xd);
|
|
|
|
for (i = 0; i < MAX_MB_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(xd, 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(xd, i, j, data);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void setup_loopfilter(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) {
|
|
VP9_COMMON *const cm = &pbi->common;
|
|
MACROBLOCKD *const xd = &pbi->mb;
|
|
|
|
cm->filter_level = vp9_rb_read_literal(rb, 6);
|
|
cm->sharpness_level = vp9_rb_read_literal(rb, 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 = vp9_rb_read_bit(rb);
|
|
if (xd->mode_ref_lf_delta_enabled) {
|
|
xd->mode_ref_lf_delta_update = vp9_rb_read_bit(rb);
|
|
if (xd->mode_ref_lf_delta_update) {
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_REF_LF_DELTAS; i++) {
|
|
if (vp9_rb_read_bit(rb)) {
|
|
const int value = vp9_rb_read_literal(rb, 6);
|
|
xd->ref_lf_deltas[i] = vp9_rb_read_bit(rb) ? -value : value;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < MAX_MODE_LF_DELTAS; i++) {
|
|
if (vp9_rb_read_bit(rb)) {
|
|
const int value = vp9_rb_read_literal(rb, 6);
|
|
xd->mode_lf_deltas[i] = vp9_rb_read_bit(rb) ? -value : value;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) {
|
|
const int old = *delta_q;
|
|
if (vp9_rb_read_bit(rb)) {
|
|
const int value = vp9_rb_read_literal(rb, 4);
|
|
*delta_q = vp9_rb_read_bit(rb) ? -value : value;
|
|
}
|
|
return old != *delta_q;
|
|
}
|
|
|
|
static void setup_quantization(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) {
|
|
MACROBLOCKD *const xd = &pbi->mb;
|
|
VP9_COMMON *const cm = &pbi->common;
|
|
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;
|
|
if (xd->lossless) {
|
|
xd->itxm_add = vp9_idct_add_lossless_c;
|
|
} else {
|
|
xd->itxm_add = vp9_idct_add;
|
|
}
|
|
}
|
|
|
|
static INTERPOLATIONFILTERTYPE read_interp_filter_type(
|
|
struct vp9_read_bit_buffer *rb) {
|
|
return vp9_rb_read_bit(rb) ? SWITCHABLE
|
|
: vp9_rb_read_literal(rb, 2);
|
|
}
|
|
|
|
static void read_frame_size(VP9_COMMON *cm, 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(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) {
|
|
VP9_COMMON *const cm = &pbi->common;
|
|
cm->display_width = cm->width;
|
|
cm->display_height = cm->height;
|
|
if (vp9_rb_read_bit(rb))
|
|
read_frame_size(cm, 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) {
|
|
if (!pbi->initial_width || !pbi->initial_height) {
|
|
if (vp9_alloc_frame_buffers(cm, width, height))
|
|
vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
|
|
"Failed to allocate frame buffers");
|
|
pbi->initial_width = width;
|
|
pbi->initial_height = height;
|
|
} else {
|
|
if (width > pbi->initial_width)
|
|
vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
|
|
"Frame width too large");
|
|
|
|
if (height > pbi->initial_height)
|
|
vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
|
|
"Frame height too large");
|
|
}
|
|
|
|
cm->width = width;
|
|
cm->height = height;
|
|
|
|
vp9_update_frame_size(cm);
|
|
}
|
|
|
|
vp9_realloc_frame_buffer(&cm->yv12_fb[cm->new_fb_idx], cm->width, cm->height,
|
|
cm->subsampling_x, cm->subsampling_y,
|
|
VP9BORDERINPIXELS);
|
|
}
|
|
|
|
static void setup_frame_size(VP9D_COMP *pbi,
|
|
struct vp9_read_bit_buffer *rb) {
|
|
VP9_COMMON *const cm = &pbi->common;
|
|
int width, height;
|
|
read_frame_size(cm, rb, &width, &height);
|
|
setup_display_size(pbi, rb);
|
|
apply_frame_size(pbi, width, height);
|
|
}
|
|
|
|
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 < ALLOWED_REFS_PER_FRAME; ++i) {
|
|
if (vp9_rb_read_bit(rb)) {
|
|
YV12_BUFFER_CONFIG *cfg = &cm->yv12_fb[cm->active_ref_idx[i]];
|
|
width = cfg->y_crop_width;
|
|
height = cfg->y_crop_height;
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
read_frame_size(cm, rb, &width, &height);
|
|
|
|
if (!width || !height)
|
|
vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
|
|
"Referenced frame with invalid size");
|
|
|
|
setup_display_size(pbi, rb);
|
|
apply_frame_size(pbi, width, height);
|
|
}
|
|
|
|
static void update_frame_context(FRAME_CONTEXT *fc) {
|
|
vp9_copy(fc->pre_coef_probs, fc->coef_probs);
|
|
vp9_copy(fc->pre_y_mode_prob, fc->y_mode_prob);
|
|
vp9_copy(fc->pre_uv_mode_prob, fc->uv_mode_prob);
|
|
vp9_copy(fc->pre_partition_prob, fc->partition_prob[1]);
|
|
vp9_copy(fc->pre_intra_inter_prob, fc->intra_inter_prob);
|
|
vp9_copy(fc->pre_comp_inter_prob, fc->comp_inter_prob);
|
|
vp9_copy(fc->pre_single_ref_prob, fc->single_ref_prob);
|
|
vp9_copy(fc->pre_comp_ref_prob, fc->comp_ref_prob);
|
|
fc->pre_nmvc = fc->nmvc;
|
|
vp9_copy(fc->pre_switchable_interp_prob, fc->switchable_interp_prob);
|
|
vp9_copy(fc->pre_inter_mode_probs, fc->inter_mode_probs);
|
|
vp9_copy(fc->pre_tx_probs_8x8p, fc->tx_probs_8x8p);
|
|
vp9_copy(fc->pre_tx_probs_16x16p, fc->tx_probs_16x16p);
|
|
vp9_copy(fc->pre_tx_probs_32x32p, fc->tx_probs_32x32p);
|
|
vp9_copy(fc->pre_mbskip_probs, fc->mbskip_probs);
|
|
|
|
vp9_zero(fc->coef_counts);
|
|
vp9_zero(fc->eob_branch_counts);
|
|
vp9_zero(fc->y_mode_counts);
|
|
vp9_zero(fc->uv_mode_counts);
|
|
vp9_zero(fc->NMVcount);
|
|
vp9_zero(fc->inter_mode_counts);
|
|
vp9_zero(fc->partition_counts);
|
|
vp9_zero(fc->switchable_interp_count);
|
|
vp9_zero(fc->intra_inter_count);
|
|
vp9_zero(fc->comp_inter_count);
|
|
vp9_zero(fc->single_ref_count);
|
|
vp9_zero(fc->comp_ref_count);
|
|
vp9_zero(fc->tx_count_8x8p);
|
|
vp9_zero(fc->tx_count_16x16p);
|
|
vp9_zero(fc->tx_count_32x32p);
|
|
vp9_zero(fc->mbskip_count);
|
|
}
|
|
|
|
static void decode_tile(VP9D_COMP *pbi, vp9_reader *r) {
|
|
VP9_COMMON *const pc = &pbi->common;
|
|
int mi_row, mi_col;
|
|
|
|
for (mi_row = pc->cur_tile_mi_row_start;
|
|
mi_row < pc->cur_tile_mi_row_end; mi_row += 64 / MI_SIZE) {
|
|
// 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));
|
|
vpx_memset(pc->left_seg_context, 0, sizeof(pc->left_seg_context));
|
|
for (mi_col = pc->cur_tile_mi_col_start;
|
|
mi_col < pc->cur_tile_mi_col_end; mi_col += 64 / MI_SIZE)
|
|
decode_modes_sb(pbi, mi_row, mi_col, r, BLOCK_SIZE_SB64X64);
|
|
}
|
|
}
|
|
|
|
static void setup_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
|
|
int delta_log2_tiles;
|
|
|
|
vp9_get_tile_n_bits(cm, &cm->log2_tile_columns, &delta_log2_tiles);
|
|
while (delta_log2_tiles--) {
|
|
if (vp9_rb_read_bit(rb)) {
|
|
cm->log2_tile_columns++;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
cm->log2_tile_rows = vp9_rb_read_bit(rb);
|
|
if (cm->log2_tile_rows)
|
|
cm->log2_tile_rows += vp9_rb_read_bit(rb);
|
|
|
|
cm->tile_columns = 1 << cm->log2_tile_columns;
|
|
cm->tile_rows = 1 << cm->log2_tile_rows;
|
|
}
|
|
|
|
static void decode_tiles(VP9D_COMP *pbi,
|
|
const uint8_t *data, size_t first_partition_size,
|
|
vp9_reader *residual_bc) {
|
|
VP9_COMMON *const pc = &pbi->common;
|
|
|
|
const uint8_t *data_ptr = data + first_partition_size;
|
|
const uint8_t* const data_end = pbi->source + pbi->source_sz;
|
|
int tile_row, tile_col;
|
|
|
|
// Note: this memset assumes above_context[0], [1] and [2]
|
|
// are allocated as part of the same buffer.
|
|
vpx_memset(pc->above_context[0], 0, sizeof(ENTROPY_CONTEXT) * 2 *
|
|
MAX_MB_PLANE * mi_cols_aligned_to_sb(pc));
|
|
|
|
vpx_memset(pc->above_seg_context, 0, sizeof(PARTITION_CONTEXT) *
|
|
mi_cols_aligned_to_sb(pc));
|
|
|
|
if (pbi->oxcf.inv_tile_order) {
|
|
const int n_cols = pc->tile_columns;
|
|
const uint8_t *data_ptr2[4][1 << 6];
|
|
vp9_reader bc_bak = {0};
|
|
|
|
// pre-initialize the offsets, we're going to read in inverse order
|
|
data_ptr2[0][0] = data_ptr;
|
|
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
|
|
if (tile_row) {
|
|
const int size = read_be32(data_ptr2[tile_row - 1][n_cols - 1]);
|
|
data_ptr2[tile_row - 1][n_cols - 1] += 4;
|
|
data_ptr2[tile_row][0] = data_ptr2[tile_row - 1][n_cols - 1] + size;
|
|
}
|
|
|
|
for (tile_col = 1; tile_col < n_cols; tile_col++) {
|
|
const int size = read_be32(data_ptr2[tile_row][tile_col - 1]);
|
|
data_ptr2[tile_row][tile_col - 1] += 4;
|
|
data_ptr2[tile_row][tile_col] =
|
|
data_ptr2[tile_row][tile_col - 1] + size;
|
|
}
|
|
}
|
|
|
|
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
|
|
vp9_get_tile_row_offsets(pc, tile_row);
|
|
for (tile_col = n_cols - 1; tile_col >= 0; tile_col--) {
|
|
vp9_get_tile_col_offsets(pc, tile_col);
|
|
setup_token_decoder(pbi, data_ptr2[tile_row][tile_col],
|
|
data_end - data_ptr2[tile_row][tile_col],
|
|
residual_bc);
|
|
decode_tile(pbi, residual_bc);
|
|
if (tile_row == pc->tile_rows - 1 && tile_col == n_cols - 1)
|
|
bc_bak = *residual_bc;
|
|
}
|
|
}
|
|
*residual_bc = bc_bak;
|
|
} else {
|
|
int has_more;
|
|
|
|
for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) {
|
|
vp9_get_tile_row_offsets(pc, tile_row);
|
|
for (tile_col = 0; tile_col < pc->tile_columns; tile_col++) {
|
|
size_t size;
|
|
|
|
vp9_get_tile_col_offsets(pc, tile_col);
|
|
|
|
has_more = tile_col < pc->tile_columns - 1 ||
|
|
tile_row < pc->tile_rows - 1;
|
|
if (has_more) {
|
|
if (!read_is_valid(data_ptr, 4, data_end))
|
|
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
|
|
"Truncated packet or corrupt tile length");
|
|
|
|
size = read_be32(data_ptr);
|
|
data_ptr += 4;
|
|
} else {
|
|
size = data_end - data_ptr;
|
|
}
|
|
|
|
setup_token_decoder(pbi, data_ptr, size, residual_bc);
|
|
decode_tile(pbi, residual_bc);
|
|
data_ptr += size;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void check_sync_code(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
|
|
if (vp9_rb_read_literal(rb, 8) != SYNC_CODE_0 ||
|
|
vp9_rb_read_literal(rb, 8) != SYNC_CODE_1 ||
|
|
vp9_rb_read_literal(rb, 8) != 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");
|
|
}
|
|
|
|
static void setup_inter_inter(VP9_COMMON *cm) {
|
|
int i;
|
|
|
|
cm->allow_comp_inter_inter = 0;
|
|
for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) {
|
|
cm->allow_comp_inter_inter |= i > 0 &&
|
|
cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1];
|
|
}
|
|
|
|
if (cm->allow_comp_inter_inter) {
|
|
// which one is always-on in comp inter-inter?
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
#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;
|
|
MACROBLOCKD *const xd = &pbi->mb;
|
|
int i;
|
|
|
|
cm->last_frame_type = cm->frame_type;
|
|
|
|
if (vp9_rb_read_literal(rb, 2) != 0x2)
|
|
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
|
|
"Invalid frame marker");
|
|
|
|
cm->version = vp9_rb_read_bit(rb);
|
|
RESERVED;
|
|
|
|
if (vp9_rb_read_bit(rb)) {
|
|
// show an existing frame directly
|
|
int frame_to_show = cm->ref_frame_map[vp9_rb_read_literal(rb, 3)];
|
|
ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->new_fb_idx, frame_to_show);
|
|
pbi->refresh_frame_flags = 0;
|
|
cm->filter_level = 0;
|
|
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) {
|
|
int csp;
|
|
|
|
check_sync_code(cm, rb);
|
|
|
|
csp = vp9_rb_read_literal(rb, 3); // colorspace
|
|
if (csp != 7) { // != 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 << NUM_REF_FRAMES) - 1;
|
|
|
|
for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i)
|
|
cm->active_ref_idx[i] = cm->new_fb_idx;
|
|
|
|
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, NUM_REF_FRAMES);
|
|
setup_frame_size(pbi, rb);
|
|
} else {
|
|
pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES);
|
|
|
|
for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) {
|
|
const int ref = vp9_rb_read_literal(rb, NUM_REF_FRAMES_LG2);
|
|
cm->active_ref_idx[i] = cm->ref_frame_map[ref];
|
|
cm->ref_frame_sign_bias[LAST_FRAME + i] = vp9_rb_read_bit(rb);
|
|
}
|
|
|
|
setup_frame_size_with_refs(pbi, rb);
|
|
|
|
xd->allow_high_precision_mv = vp9_rb_read_bit(rb);
|
|
cm->mcomp_filter_type = read_interp_filter_type(rb);
|
|
|
|
for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i)
|
|
vp9_setup_scale_factors(cm, i);
|
|
|
|
setup_inter_inter(cm);
|
|
}
|
|
}
|
|
|
|
if (!cm->error_resilient_mode) {
|
|
cm->refresh_frame_context = vp9_rb_read_bit(rb);
|
|
cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb);
|
|
} else {
|
|
cm->refresh_frame_context = 0;
|
|
cm->frame_parallel_decoding_mode = 1;
|
|
}
|
|
|
|
cm->frame_context_idx = vp9_rb_read_literal(rb, NUM_FRAME_CONTEXTS_LG2);
|
|
|
|
if (cm->frame_type == KEY_FRAME || cm->error_resilient_mode || cm->intra_only)
|
|
vp9_setup_past_independence(cm, xd);
|
|
|
|
setup_loopfilter(pbi, rb);
|
|
setup_quantization(pbi, rb);
|
|
setup_segmentation(pbi, rb);
|
|
|
|
setup_tile_info(cm, rb);
|
|
|
|
return vp9_rb_read_literal(rb, 16);
|
|
}
|
|
|
|
int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) {
|
|
int i;
|
|
vp9_reader header_bc, residual_bc;
|
|
VP9_COMMON *const pc = &pbi->common;
|
|
MACROBLOCKD *const xd = &pbi->mb;
|
|
|
|
const uint8_t *data = pbi->source;
|
|
const uint8_t *data_end = pbi->source + pbi->source_sz;
|
|
|
|
struct vp9_read_bit_buffer rb = { data, data_end, 0,
|
|
pc, error_handler };
|
|
const size_t first_partition_size = read_uncompressed_header(pbi, &rb);
|
|
const int keyframe = pc->frame_type == KEY_FRAME;
|
|
YV12_BUFFER_CONFIG *new_fb = &pc->yv12_fb[pc->new_fb_idx];
|
|
|
|
if (!first_partition_size) {
|
|
// showing a frame directly
|
|
*p_data_end = data + 1;
|
|
return 0;
|
|
}
|
|
data += vp9_rb_bytes_read(&rb);
|
|
xd->corrupted = 0;
|
|
new_fb->corrupted = 0;
|
|
|
|
if (!pbi->decoded_key_frame && !keyframe)
|
|
return -1;
|
|
|
|
if (!read_is_valid(data, first_partition_size, data_end))
|
|
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
|
|
"Truncated packet or corrupt header length");
|
|
|
|
xd->mode_info_context = pc->mi;
|
|
xd->prev_mode_info_context = pc->prev_mi;
|
|
xd->frame_type = pc->frame_type;
|
|
xd->mode_info_stride = pc->mode_info_stride;
|
|
|
|
if (vp9_reader_init(&header_bc, data, first_partition_size))
|
|
vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
|
|
"Failed to allocate bool decoder 0");
|
|
|
|
mb_init_dequantizer(pc, &pbi->mb); // MB level dequantizer setup
|
|
|
|
if (!keyframe)
|
|
vp9_setup_interp_filters(xd, pc->mcomp_filter_type, pc);
|
|
|
|
pc->fc = pc->frame_contexts[pc->frame_context_idx];
|
|
|
|
update_frame_context(&pc->fc);
|
|
|
|
setup_txfm_mode(pc, xd->lossless, &header_bc);
|
|
|
|
read_coef_probs(pbi, &header_bc);
|
|
|
|
// Initialize xd pointers. Any reference should do for xd->pre, so use 0.
|
|
setup_pre_planes(xd, &pc->yv12_fb[pc->active_ref_idx[0]], NULL,
|
|
0, 0, NULL, NULL);
|
|
setup_dst_planes(xd, new_fb, 0, 0);
|
|
|
|
// 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->mi_rows * pc->mi_cols), 1));
|
|
|
|
vp9_setup_block_dptrs(xd, pc->subsampling_x, pc->subsampling_y);
|
|
|
|
// clear out the coeff buffer
|
|
for (i = 0; i < MAX_MB_PLANE; ++i)
|
|
vp9_zero(xd->plane[i].qcoeff);
|
|
|
|
set_prev_mi(pc);
|
|
|
|
vp9_decode_mode_mvs_init(pbi, &header_bc);
|
|
|
|
decode_tiles(pbi, data, first_partition_size, &residual_bc);
|
|
|
|
pc->last_width = pc->width;
|
|
pc->last_height = pc->height;
|
|
|
|
new_fb->corrupted = vp9_reader_has_error(&header_bc) | xd->corrupted;
|
|
|
|
if (!pbi->decoded_key_frame) {
|
|
if (keyframe && !new_fb->corrupted)
|
|
pbi->decoded_key_frame = 1;
|
|
else
|
|
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
|
|
"A stream must start with a complete key frame");
|
|
}
|
|
|
|
// Adaptation
|
|
if (!pc->error_resilient_mode && !pc->frame_parallel_decoding_mode) {
|
|
vp9_adapt_coef_probs(pc);
|
|
|
|
if ((!keyframe) && (!pc->intra_only)) {
|
|
vp9_adapt_mode_probs(pc);
|
|
vp9_adapt_mode_context(pc);
|
|
vp9_adapt_mv_probs(pc, xd->allow_high_precision_mv);
|
|
}
|
|
}
|
|
|
|
if (pc->refresh_frame_context)
|
|
pc->frame_contexts[pc->frame_context_idx] = pc->fc;
|
|
|
|
*p_data_end = vp9_reader_find_end(&residual_bc);
|
|
return 0;
|
|
}
|