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Diffstat (limited to 'third_party/aom/av1/common/av1_inv_txfm2d.c')
-rw-r--r--third_party/aom/av1/common/av1_inv_txfm2d.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/av1_inv_txfm2d.c b/third_party/aom/av1/common/av1_inv_txfm2d.c
new file mode 100644
index 000000000..d56c7d11f
--- /dev/null
+++ b/third_party/aom/av1/common/av1_inv_txfm2d.c
@@ -0,0 +1,256 @@
+/*
+ * 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_txfm2d_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;
+ default: assert(0); return NULL;
+ }
+}
+
+const TXFM_2D_CFG *inv_txfm_cfg_ls[TX_TYPES][TX_SIZES] = {
+ // DCT_DCT
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_dct_dct_4, &inv_txfm_2d_cfg_dct_dct_8,
+ &inv_txfm_2d_cfg_dct_dct_16, &inv_txfm_2d_cfg_dct_dct_32 },
+ // ADST_DCT
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_dct_4, &inv_txfm_2d_cfg_adst_dct_8,
+ &inv_txfm_2d_cfg_adst_dct_16, &inv_txfm_2d_cfg_adst_dct_32 },
+ // DCT_ADST
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_dct_adst_4, &inv_txfm_2d_cfg_dct_adst_8,
+ &inv_txfm_2d_cfg_dct_adst_16, &inv_txfm_2d_cfg_dct_adst_32 },
+ // ADST_ADST
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_32 },
+#if CONFIG_EXT_TX
+ // FLIPADST_DCT
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_dct_4, &inv_txfm_2d_cfg_adst_dct_8,
+ &inv_txfm_2d_cfg_adst_dct_16, &inv_txfm_2d_cfg_adst_dct_32 },
+ // DCT_FLIPADST
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_dct_adst_4, &inv_txfm_2d_cfg_dct_adst_8,
+ &inv_txfm_2d_cfg_dct_adst_16, &inv_txfm_2d_cfg_dct_adst_32 },
+ // FLIPADST_FLIPADST
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_32 },
+ // ADST_FLIPADST
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_32 },
+ // FLIPADST_ADST
+ {
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_32 },
+ { // IDTX
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_32 },
+ { // V_DCT
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_dct_adst_4, &inv_txfm_2d_cfg_dct_adst_8,
+ &inv_txfm_2d_cfg_dct_adst_16, &inv_txfm_2d_cfg_dct_adst_32 },
+ { // H_DCT
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_dct_4, &inv_txfm_2d_cfg_adst_dct_8,
+ &inv_txfm_2d_cfg_adst_dct_16, &inv_txfm_2d_cfg_adst_dct_32 },
+ { // V_ADST
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_32 },
+ { // H_ADST
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_32 },
+ { // V_FLIP_ADST
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_32 },
+ { // H_FLIP_ADST
+#if CONFIG_CB4X4
+ NULL,
+#endif
+ &inv_txfm_2d_cfg_adst_adst_4, &inv_txfm_2d_cfg_adst_adst_8,
+ &inv_txfm_2d_cfg_adst_adst_16, &inv_txfm_2d_cfg_adst_adst_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);
+ cfg.cfg = inv_txfm_cfg_ls[tx_type][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 };
+ switch (tx_type) {
+ case DCT_DCT:
+ cfg.cfg = &inv_txfm_2d_cfg_dct_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) {
+ const int txfm_size = cfg->cfg->txfm_size;
+ const int8_t *shift = cfg->cfg->shift;
+ const int8_t *stage_range_col = cfg->cfg->stage_range_col;
+ const int8_t *stage_range_row = cfg->cfg->stage_range_row;
+ const int8_t *cos_bit_col = cfg->cfg->cos_bit_col;
+ const int8_t *cos_bit_row = cfg->cfg->cos_bit_row;
+ const TxfmFunc txfm_func_col = inv_txfm_type_to_func(cfg->cfg->txfm_type_col);
+ const TxfmFunc txfm_func_row = inv_txfm_type_to_func(cfg->cfg->txfm_type_row);
+
+ // 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);
+ clamp_block((int16_t *)output, cfg.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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