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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include "./av1_rtcd.h"
#include "av1/common/enums.h"
#include "av1/common/av1_txfm.h"
#include "av1/common/av1_inv_txfm1d.h"
#include "av1/common/av1_inv_txfm1d_cfg.h"
static INLINE TxfmFunc inv_txfm_type_to_func(TXFM_TYPE txfm_type) {
switch (txfm_type) {
case TXFM_TYPE_DCT4: return av1_idct4_new;
case TXFM_TYPE_DCT8: return av1_idct8_new;
case TXFM_TYPE_DCT16: return av1_idct16_new;
case TXFM_TYPE_DCT32: return av1_idct32_new;
case TXFM_TYPE_ADST4: return av1_iadst4_new;
case TXFM_TYPE_ADST8: return av1_iadst8_new;
case TXFM_TYPE_ADST16: return av1_iadst16_new;
case TXFM_TYPE_ADST32: return av1_iadst32_new;
#if CONFIG_EXT_TX
case TXFM_TYPE_IDENTITY4: return av1_iidentity4_c;
case TXFM_TYPE_IDENTITY8: return av1_iidentity8_c;
case TXFM_TYPE_IDENTITY16: return av1_iidentity16_c;
case TXFM_TYPE_IDENTITY32: return av1_iidentity32_c;
#endif // CONFIG_EXT_TX
default: assert(0); return NULL;
}
}
static const TXFM_1D_CFG *inv_txfm_col_cfg_ls[TX_TYPES_1D][TX_SIZES] = {
// DCT
{
#if CONFIG_CHROMA_2X2
NULL,
#endif
&inv_txfm_1d_col_cfg_dct_4, &inv_txfm_1d_col_cfg_dct_8,
&inv_txfm_1d_col_cfg_dct_16, &inv_txfm_1d_col_cfg_dct_32 },
// ADST
{
#if CONFIG_CHROMA_2X2
NULL,
#endif
&inv_txfm_1d_col_cfg_adst_4, &inv_txfm_1d_col_cfg_adst_8,
&inv_txfm_1d_col_cfg_adst_16, &inv_txfm_1d_col_cfg_adst_32 },
#if CONFIG_EXT_TX
// FLIPADST
{
#if CONFIG_CHROMA_2X2
NULL,
#endif
&inv_txfm_1d_col_cfg_adst_4, &inv_txfm_1d_col_cfg_adst_8,
&inv_txfm_1d_col_cfg_adst_16, &inv_txfm_1d_col_cfg_adst_32 },
// IDENTITY
{
#if CONFIG_CHROMA_2X2
NULL,
#endif
&inv_txfm_1d_cfg_identity_4, &inv_txfm_1d_cfg_identity_8,
&inv_txfm_1d_cfg_identity_16, &inv_txfm_1d_cfg_identity_32 },
#endif // CONFIG_EXT_TX
};
static const TXFM_1D_CFG *inv_txfm_row_cfg_ls[TX_TYPES_1D][TX_SIZES] = {
// DCT
{
#if CONFIG_CHROMA_2X2
NULL,
#endif
&inv_txfm_1d_row_cfg_dct_4, &inv_txfm_1d_row_cfg_dct_8,
&inv_txfm_1d_row_cfg_dct_16, &inv_txfm_1d_row_cfg_dct_32 },
// ADST
{
#if CONFIG_CHROMA_2X2
NULL,
#endif
&inv_txfm_1d_row_cfg_adst_4, &inv_txfm_1d_row_cfg_adst_8,
&inv_txfm_1d_row_cfg_adst_16, &inv_txfm_1d_row_cfg_adst_32 },
#if CONFIG_EXT_TX
// FLIPADST
{
#if CONFIG_CHROMA_2X2
NULL,
#endif
&inv_txfm_1d_row_cfg_adst_4, &inv_txfm_1d_row_cfg_adst_8,
&inv_txfm_1d_row_cfg_adst_16, &inv_txfm_1d_row_cfg_adst_32 },
// IDENTITY
{
#if CONFIG_CHROMA_2X2
NULL,
#endif
&inv_txfm_1d_cfg_identity_4, &inv_txfm_1d_cfg_identity_8,
&inv_txfm_1d_cfg_identity_16, &inv_txfm_1d_cfg_identity_32 },
#endif // CONFIG_EXT_TX
};
TXFM_2D_FLIP_CFG av1_get_inv_txfm_cfg(int tx_type, int tx_size) {
TXFM_2D_FLIP_CFG cfg;
set_flip_cfg(tx_type, &cfg);
int tx_type_col = vtx_tab[tx_type];
int tx_type_row = htx_tab[tx_type];
// TODO(sarahparker) this is currently only implemented for
// square transforms
cfg.col_cfg = inv_txfm_col_cfg_ls[tx_type_col][tx_size];
cfg.row_cfg = inv_txfm_row_cfg_ls[tx_type_row][tx_size];
return cfg;
}
TXFM_2D_FLIP_CFG av1_get_inv_txfm_64x64_cfg(int tx_type) {
TXFM_2D_FLIP_CFG cfg = { 0, 0, NULL, NULL };
switch (tx_type) {
case DCT_DCT:
cfg.col_cfg = &inv_txfm_1d_col_cfg_dct_64;
cfg.row_cfg = &inv_txfm_1d_row_cfg_dct_64;
set_flip_cfg(tx_type, &cfg);
break;
default: assert(0);
}
return cfg;
}
static INLINE void inv_txfm2d_add_c(const int32_t *input, int16_t *output,
int stride, TXFM_2D_FLIP_CFG *cfg,
int32_t *txfm_buf) {
// TODO(sarahparker) must correct for rectangular transforms in follow up
const int txfm_size = cfg->row_cfg->txfm_size;
const int8_t *shift = cfg->row_cfg->shift;
const int8_t *stage_range_col = cfg->col_cfg->stage_range;
const int8_t *stage_range_row = cfg->row_cfg->stage_range;
const int8_t *cos_bit_col = cfg->col_cfg->cos_bit;
const int8_t *cos_bit_row = cfg->row_cfg->cos_bit;
const TxfmFunc txfm_func_col = inv_txfm_type_to_func(cfg->col_cfg->txfm_type);
const TxfmFunc txfm_func_row = inv_txfm_type_to_func(cfg->row_cfg->txfm_type);
// txfm_buf's length is txfm_size * txfm_size + 2 * txfm_size
// it is used for intermediate data buffering
int32_t *temp_in = txfm_buf;
int32_t *temp_out = temp_in + txfm_size;
int32_t *buf = temp_out + txfm_size;
int32_t *buf_ptr = buf;
int c, r;
// Rows
for (r = 0; r < txfm_size; ++r) {
txfm_func_row(input, buf_ptr, cos_bit_row, stage_range_row);
round_shift_array(buf_ptr, txfm_size, -shift[0]);
input += txfm_size;
buf_ptr += txfm_size;
}
// Columns
for (c = 0; c < txfm_size; ++c) {
if (cfg->lr_flip == 0) {
for (r = 0; r < txfm_size; ++r) temp_in[r] = buf[r * txfm_size + c];
} else {
// flip left right
for (r = 0; r < txfm_size; ++r)
temp_in[r] = buf[r * txfm_size + (txfm_size - c - 1)];
}
txfm_func_col(temp_in, temp_out, cos_bit_col, stage_range_col);
round_shift_array(temp_out, txfm_size, -shift[1]);
if (cfg->ud_flip == 0) {
for (r = 0; r < txfm_size; ++r) output[r * stride + c] += temp_out[r];
} else {
// flip upside down
for (r = 0; r < txfm_size; ++r)
output[r * stride + c] += temp_out[txfm_size - r - 1];
}
}
}
static INLINE void inv_txfm2d_add_facade(const int32_t *input, uint16_t *output,
int stride, int32_t *txfm_buf,
int tx_type, int tx_size, int bd) {
// output contains the prediction signal which is always positive and smaller
// than (1 << bd) - 1
// since bd < 16-1, therefore we can treat the uint16_t* output buffer as an
// int16_t*
TXFM_2D_FLIP_CFG cfg = av1_get_inv_txfm_cfg(tx_type, tx_size);
inv_txfm2d_add_c(input, (int16_t *)output, stride, &cfg, txfm_buf);
// TODO(sarahparker) just using the cfg_row->txfm_size for now because
// we are assumint this is only used for square transforms. This will
// be adjusted in a follow up
clamp_block((int16_t *)output, cfg.row_cfg->txfm_size, stride, 0,
(1 << bd) - 1);
}
void av1_inv_txfm2d_add_4x4_c(const int32_t *input, uint16_t *output,
int stride, int tx_type, int bd) {
int txfm_buf[4 * 4 + 4 + 4];
inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_4X4, bd);
}
void av1_inv_txfm2d_add_8x8_c(const int32_t *input, uint16_t *output,
int stride, int tx_type, int bd) {
int txfm_buf[8 * 8 + 8 + 8];
inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_8X8, bd);
}
void av1_inv_txfm2d_add_16x16_c(const int32_t *input, uint16_t *output,
int stride, int tx_type, int bd) {
int txfm_buf[16 * 16 + 16 + 16];
inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_16X16, bd);
}
void av1_inv_txfm2d_add_32x32_c(const int32_t *input, uint16_t *output,
int stride, int tx_type, int bd) {
int txfm_buf[32 * 32 + 32 + 32];
inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_32X32, bd);
}
void av1_inv_txfm2d_add_64x64_c(const int32_t *input, uint16_t *output,
int stride, int tx_type, int bd) {
int txfm_buf[64 * 64 + 64 + 64];
// output contains the prediction signal which is always positive and smaller
// than (1 << bd) - 1
// since bd < 16-1, therefore we can treat the uint16_t* output buffer as an
// int16_t*
TXFM_2D_FLIP_CFG cfg = av1_get_inv_txfm_64x64_cfg(tx_type);
inv_txfm2d_add_c(input, (int16_t *)output, stride, &cfg, txfm_buf);
clamp_block((int16_t *)output, 64, stride, 0, (1 << bd) - 1);
}
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