Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 230 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/av1_fwd_txfm2d.c b/third_party/aom/av1/common/av1_fwd_txfm2d.c
new file mode 100644
index 000000000..d1dba82ca
--- /dev/null
+++ b/third_party/aom/av1/common/av1_fwd_txfm2d.c
@@ -0,0 +1,230 @@
+/*
+ * 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 <assert.h>
+
+#include "./av1_rtcd.h"
+#include "av1/common/enums.h"
+#include "av1/common/av1_fwd_txfm1d.h"
+#include "av1/common/av1_fwd_txfm2d_cfg.h"
+#include "av1/common/av1_txfm.h"
+
+static INLINE TxfmFunc fwd_txfm_type_to_func(TXFM_TYPE txfm_type) {
+  switch (txfm_type) {
+    case TXFM_TYPE_DCT4: return av1_fdct4_new;
+    case TXFM_TYPE_DCT8: return av1_fdct8_new;
+    case TXFM_TYPE_DCT16: return av1_fdct16_new;
+    case TXFM_TYPE_DCT32: return av1_fdct32_new;
+    case TXFM_TYPE_ADST4: return av1_fadst4_new;
+    case TXFM_TYPE_ADST8: return av1_fadst8_new;
+    case TXFM_TYPE_ADST16: return av1_fadst16_new;
+    case TXFM_TYPE_ADST32: return av1_fadst32_new;
+    default: assert(0); return NULL;
+  }
+}
+
+static INLINE void fwd_txfm2d_c(const int16_t *input, int32_t *output,
+                                const int stride, const TXFM_2D_FLIP_CFG *cfg,
+                                int32_t *buf) {
+  int c, r;
+  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 = fwd_txfm_type_to_func(cfg->cfg->txfm_type_col);
+  const TxfmFunc txfm_func_row = fwd_txfm_type_to_func(cfg->cfg->txfm_type_row);
+
+  // use output buffer as temp buffer
+  int32_t *temp_in = output;
+  int32_t *temp_out = output + txfm_size;
+
+  // Columns
+  for (c = 0; c < txfm_size; ++c) {
+    if (cfg->ud_flip == 0) {
+      for (r = 0; r < txfm_size; ++r) temp_in[r] = input[r * stride + c];
+    } else {
+      for (r = 0; r < txfm_size; ++r)
+        // flip upside down
+        temp_in[r] = input[(txfm_size - r - 1) * stride + c];
+    }
+    round_shift_array(temp_in, txfm_size, -shift[0]);
+    txfm_func_col(temp_in, temp_out, cos_bit_col, stage_range_col);
+    round_shift_array(temp_out, txfm_size, -shift[1]);
+    if (cfg->lr_flip == 0) {
+      for (r = 0; r < txfm_size; ++r) buf[r * txfm_size + c] = temp_out[r];
+    } else {
+      for (r = 0; r < txfm_size; ++r)
+        // flip from left to right
+        buf[r * txfm_size + (txfm_size - c - 1)] = temp_out[r];
+    }
+  }
+
+  // Rows
+  for (r = 0; r < txfm_size; ++r) {
+    txfm_func_row(buf + r * txfm_size, output + r * txfm_size, cos_bit_row,
+                  stage_range_row);
+    round_shift_array(output + r * txfm_size, txfm_size, -shift[2]);
+  }
+}
+
+void av1_fwd_txfm2d_4x4_c(const int16_t *input, int32_t *output, int stride,
+                          int tx_type, int bd) {
+  int32_t txfm_buf[4 * 4];
+  TXFM_2D_FLIP_CFG cfg = av1_get_fwd_txfm_cfg(tx_type, TX_4X4);
+  (void)bd;
+  fwd_txfm2d_c(input, output, stride, &cfg, txfm_buf);
+}
+
+void av1_fwd_txfm2d_8x8_c(const int16_t *input, int32_t *output, int stride,
+                          int tx_type, int bd) {
+  int32_t txfm_buf[8 * 8];
+  TXFM_2D_FLIP_CFG cfg = av1_get_fwd_txfm_cfg(tx_type, TX_8X8);
+  (void)bd;
+  fwd_txfm2d_c(input, output, stride, &cfg, txfm_buf);
+}
+
+void av1_fwd_txfm2d_16x16_c(const int16_t *input, int32_t *output, int stride,
+                            int tx_type, int bd) {
+  int32_t txfm_buf[16 * 16];
+  TXFM_2D_FLIP_CFG cfg = av1_get_fwd_txfm_cfg(tx_type, TX_16X16);
+  (void)bd;
+  fwd_txfm2d_c(input, output, stride, &cfg, txfm_buf);
+}
+
+void av1_fwd_txfm2d_32x32_c(const int16_t *input, int32_t *output, int stride,
+                            int tx_type, int bd) {
+  int32_t txfm_buf[32 * 32];
+  TXFM_2D_FLIP_CFG cfg = av1_get_fwd_txfm_cfg(tx_type, TX_32X32);
+  (void)bd;
+  fwd_txfm2d_c(input, output, stride, &cfg, txfm_buf);
+}
+
+void av1_fwd_txfm2d_64x64_c(const int16_t *input, int32_t *output, int stride,
+                            int tx_type, int bd) {
+  int32_t txfm_buf[64 * 64];
+  TXFM_2D_FLIP_CFG cfg = av1_get_fwd_txfm_64x64_cfg(tx_type);
+  (void)bd;
+  fwd_txfm2d_c(input, output, stride, &cfg, txfm_buf);
+}
+
+#if CONFIG_EXT_TX
+static const TXFM_2D_CFG *fwd_txfm_cfg_ls[FLIPADST_ADST + 1][TX_SIZES] = {
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_dct_dct_4, &fwd_txfm_2d_cfg_dct_dct_8,
+      &fwd_txfm_2d_cfg_dct_dct_16, &fwd_txfm_2d_cfg_dct_dct_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_adst_dct_4, &fwd_txfm_2d_cfg_adst_dct_8,
+      &fwd_txfm_2d_cfg_adst_dct_16, &fwd_txfm_2d_cfg_adst_dct_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_dct_adst_4, &fwd_txfm_2d_cfg_dct_adst_8,
+      &fwd_txfm_2d_cfg_dct_adst_16, &fwd_txfm_2d_cfg_dct_adst_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_adst_adst_4, &fwd_txfm_2d_cfg_adst_adst_8,
+      &fwd_txfm_2d_cfg_adst_adst_16, &fwd_txfm_2d_cfg_adst_adst_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_adst_dct_4, &fwd_txfm_2d_cfg_adst_dct_8,
+      &fwd_txfm_2d_cfg_adst_dct_16, &fwd_txfm_2d_cfg_adst_dct_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_dct_adst_4, &fwd_txfm_2d_cfg_dct_adst_8,
+      &fwd_txfm_2d_cfg_dct_adst_16, &fwd_txfm_2d_cfg_dct_adst_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_adst_adst_4, &fwd_txfm_2d_cfg_adst_adst_8,
+      &fwd_txfm_2d_cfg_adst_adst_16, &fwd_txfm_2d_cfg_adst_adst_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_adst_adst_4, &fwd_txfm_2d_cfg_adst_adst_8,
+      &fwd_txfm_2d_cfg_adst_adst_16, &fwd_txfm_2d_cfg_adst_adst_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_adst_adst_4, &fwd_txfm_2d_cfg_adst_adst_8,
+      &fwd_txfm_2d_cfg_adst_adst_16, &fwd_txfm_2d_cfg_adst_adst_32 },
+};
+#else  // CONFIG_EXT_TX
+static const TXFM_2D_CFG *fwd_txfm_cfg_ls[TX_TYPES][TX_SIZES] = {
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_dct_dct_4, &fwd_txfm_2d_cfg_dct_dct_8,
+      &fwd_txfm_2d_cfg_dct_dct_16, &fwd_txfm_2d_cfg_dct_dct_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_adst_dct_4, &fwd_txfm_2d_cfg_adst_dct_8,
+      &fwd_txfm_2d_cfg_adst_dct_16, &fwd_txfm_2d_cfg_adst_dct_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_dct_adst_4, &fwd_txfm_2d_cfg_dct_adst_8,
+      &fwd_txfm_2d_cfg_dct_adst_16, &fwd_txfm_2d_cfg_dct_adst_32 },
+  {
+#if CONFIG_CB4X4
+      NULL,
+#endif
+      &fwd_txfm_2d_cfg_adst_adst_4, &fwd_txfm_2d_cfg_adst_adst_8,
+      &fwd_txfm_2d_cfg_adst_adst_16, &fwd_txfm_2d_cfg_adst_adst_32 },
+};
+#endif  // CONFIG_EXT_TX
+
+TXFM_2D_FLIP_CFG av1_get_fwd_txfm_cfg(int tx_type, int tx_size) {
+  TXFM_2D_FLIP_CFG cfg;
+  set_flip_cfg(tx_type, &cfg);
+  cfg.cfg = fwd_txfm_cfg_ls[tx_type][tx_size];
+  return cfg;
+}
+
+TXFM_2D_FLIP_CFG av1_get_fwd_txfm_64x64_cfg(int tx_type) {
+  TXFM_2D_FLIP_CFG cfg;
+  switch (tx_type) {
+    case DCT_DCT:
+      cfg.cfg = &fwd_txfm_2d_cfg_dct_dct_64;
+      cfg.ud_flip = 0;
+      cfg.lr_flip = 0;
+      break;
+    case ADST_DCT:
+    case DCT_ADST:
+    case ADST_ADST:
+    default:
+      cfg.ud_flip = 0;
+      cfg.lr_flip = 0;
+      assert(0);
+  }
+  return cfg;
+}