Move aom source to a sub-directory under media/libaom

There is no damned reason to treat this differently than any other media lib given its license and there never was.

1 files changed, 232 insertions, 0 deletions

diff --git a/media/libaom/src/av1/common/av1_txfm.h b/media/libaom/src/av1/common/av1_txfm.h
new file mode 100644
index 000000000..59d64ca4a
--- /dev/null
+++ b/media/libaom/src/av1/common/av1_txfm.h
@@ -0,0 +1,232 @@
+/*
+ * 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.
+ */
+
+#ifndef AOM_AV1_COMMON_AV1_TXFM_H_
+#define AOM_AV1_COMMON_AV1_TXFM_H_
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+
+#include "config/aom_config.h"
+
+#include "av1/common/enums.h"
+#include "av1/common/blockd.h"
+#include "aom/aom_integer.h"
+#include "aom_dsp/aom_dsp_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(DO_RANGE_CHECK_CLAMP)
+#define DO_RANGE_CHECK_CLAMP 0
+#endif
+
+extern const int32_t av1_cospi_arr_data[7][64];
+extern const int32_t av1_sinpi_arr_data[7][5];
+
+#define MAX_TXFM_STAGE_NUM 12
+
+static const int cos_bit_min = 10;
+static const int cos_bit_max = 16;
+
+#define NewSqrt2Bits ((int32_t)12)
+// 2^12 * sqrt(2)
+static const int32_t NewSqrt2 = 5793;
+// 2^12 / sqrt(2)
+static const int32_t NewInvSqrt2 = 2896;
+
+static INLINE const int32_t *cospi_arr(int n) {
+  return av1_cospi_arr_data[n - cos_bit_min];
+}
+
+static INLINE const int32_t *sinpi_arr(int n) {
+  return av1_sinpi_arr_data[n - cos_bit_min];
+}
+
+static INLINE int32_t range_check_value(int32_t value, int8_t bit) {
+#if CONFIG_COEFFICIENT_RANGE_CHECKING
+  const int64_t max_value = (1LL << (bit - 1)) - 1;
+  const int64_t min_value = -(1LL << (bit - 1));
+  if (value < min_value || value > max_value) {
+    fprintf(stderr, "coeff out of bit range, value: %d bit %d\n", value, bit);
+    assert(0);
+  }
+#endif  // CONFIG_COEFFICIENT_RANGE_CHECKING
+#if DO_RANGE_CHECK_CLAMP
+  bit = AOMMIN(bit, 31);
+  return clamp(value, -(1 << (bit - 1)), (1 << (bit - 1)) - 1);
+#endif  // DO_RANGE_CHECK_CLAMP
+  (void)bit;
+  return value;
+}
+
+static INLINE int32_t round_shift(int64_t value, int bit) {
+  assert(bit >= 1);
+  return (int32_t)((value + (1ll << (bit - 1))) >> bit);
+}
+
+static INLINE int32_t half_btf(int32_t w0, int32_t in0, int32_t w1, int32_t in1,
+                               int bit) {
+  int64_t result_64 = (int64_t)(w0 * in0) + (int64_t)(w1 * in1);
+  int64_t intermediate = result_64 + (1LL << (bit - 1));
+  // NOTE(david.barker): The value 'result_64' may not necessarily fit
+  // into 32 bits. However, the result of this function is nominally
+  // ROUND_POWER_OF_TWO_64(result_64, bit)
+  // and that is required to fit into stage_range[stage] many bits
+  // (checked by range_check_buf()).
+  //
+  // Here we've unpacked that rounding operation, and it can be shown
+  // that the value of 'intermediate' here *does* fit into 32 bits
+  // for any conformant bitstream.
+  // The upshot is that, if you do all this calculation using
+  // wrapping 32-bit arithmetic instead of (non-wrapping) 64-bit arithmetic,
+  // then you'll still get the correct result.
+  // To provide a check on this logic, we assert that 'intermediate'
+  // would fit into an int32 if range checking is enabled.
+#if CONFIG_COEFFICIENT_RANGE_CHECKING
+  assert(intermediate >= INT32_MIN && intermediate <= INT32_MAX);
+#endif
+  return (int32_t)(intermediate >> bit);
+}
+
+static INLINE uint16_t highbd_clip_pixel_add(uint16_t dest, tran_high_t trans,
+                                             int bd) {
+  return clip_pixel_highbd(dest + (int)trans, bd);
+}
+
+typedef void (*TxfmFunc)(const int32_t *input, int32_t *output, int8_t cos_bit,
+                         const int8_t *stage_range);
+
+typedef void (*FwdTxfm2dFunc)(const int16_t *input, int32_t *output, int stride,
+                              TX_TYPE tx_type, int bd);
+
+typedef enum TXFM_TYPE {
+  TXFM_TYPE_DCT4,
+  TXFM_TYPE_DCT8,
+  TXFM_TYPE_DCT16,
+  TXFM_TYPE_DCT32,
+  TXFM_TYPE_DCT64,
+  TXFM_TYPE_ADST4,
+  TXFM_TYPE_ADST8,
+  TXFM_TYPE_ADST16,
+  TXFM_TYPE_IDENTITY4,
+  TXFM_TYPE_IDENTITY8,
+  TXFM_TYPE_IDENTITY16,
+  TXFM_TYPE_IDENTITY32,
+  TXFM_TYPES,
+  TXFM_TYPE_INVALID,
+} TXFM_TYPE;
+
+typedef struct TXFM_2D_FLIP_CFG {
+  TX_SIZE tx_size;
+  int ud_flip;  // flip upside down
+  int lr_flip;  // flip left to right
+  const int8_t *shift;
+  int8_t cos_bit_col;
+  int8_t cos_bit_row;
+  int8_t stage_range_col[MAX_TXFM_STAGE_NUM];
+  int8_t stage_range_row[MAX_TXFM_STAGE_NUM];
+  TXFM_TYPE txfm_type_col;
+  TXFM_TYPE txfm_type_row;
+  int stage_num_col;
+  int stage_num_row;
+} TXFM_2D_FLIP_CFG;
+
+static INLINE void get_flip_cfg(TX_TYPE tx_type, int *ud_flip, int *lr_flip) {
+  switch (tx_type) {
+    case DCT_DCT:
+    case ADST_DCT:
+    case DCT_ADST:
+    case ADST_ADST:
+      *ud_flip = 0;
+      *lr_flip = 0;
+      break;
+    case IDTX:
+    case V_DCT:
+    case H_DCT:
+    case V_ADST:
+    case H_ADST:
+      *ud_flip = 0;
+      *lr_flip = 0;
+      break;
+    case FLIPADST_DCT:
+    case FLIPADST_ADST:
+    case V_FLIPADST:
+      *ud_flip = 1;
+      *lr_flip = 0;
+      break;
+    case DCT_FLIPADST:
+    case ADST_FLIPADST:
+    case H_FLIPADST:
+      *ud_flip = 0;
+      *lr_flip = 1;
+      break;
+    case FLIPADST_FLIPADST:
+      *ud_flip = 1;
+      *lr_flip = 1;
+      break;
+    default:
+      *ud_flip = 0;
+      *lr_flip = 0;
+      assert(0);
+  }
+}
+
+static INLINE void set_flip_cfg(TX_TYPE tx_type, TXFM_2D_FLIP_CFG *cfg) {
+  get_flip_cfg(tx_type, &cfg->ud_flip, &cfg->lr_flip);
+}
+
+// Utility function that returns the log of the ratio of the col and row
+// sizes.
+static INLINE int get_rect_tx_log_ratio(int col, int row) {
+  if (col == row) return 0;
+  if (col > row) {
+    if (col == row * 2) return 1;
+    if (col == row * 4) return 2;
+    assert(0 && "Unsupported transform size");
+  } else {
+    if (row == col * 2) return -1;
+    if (row == col * 4) return -2;
+    assert(0 && "Unsupported transform size");
+  }
+  return 0;  // Invalid
+}
+
+void av1_gen_fwd_stage_range(int8_t *stage_range_col, int8_t *stage_range_row,
+                             const TXFM_2D_FLIP_CFG *cfg, int bd);
+
+void av1_gen_inv_stage_range(int8_t *stage_range_col, int8_t *stage_range_row,
+                             const TXFM_2D_FLIP_CFG *cfg, TX_SIZE tx_size,
+                             int bd);
+
+void av1_get_fwd_txfm_cfg(TX_TYPE tx_type, TX_SIZE tx_size,
+                          TXFM_2D_FLIP_CFG *cfg);
+void av1_get_inv_txfm_cfg(TX_TYPE tx_type, TX_SIZE tx_size,
+                          TXFM_2D_FLIP_CFG *cfg);
+extern const TXFM_TYPE av1_txfm_type_ls[5][TX_TYPES_1D];
+extern const int8_t av1_txfm_stage_num_list[TXFM_TYPES];
+static INLINE int get_txw_idx(TX_SIZE tx_size) {
+  return tx_size_wide_log2[tx_size] - tx_size_wide_log2[0];
+}
+static INLINE int get_txh_idx(TX_SIZE tx_size) {
+  return tx_size_high_log2[tx_size] - tx_size_high_log2[0];
+}
+
+void av1_range_check_buf(int32_t stage, const int32_t *input,
+                         const int32_t *buf, int32_t size, int8_t bit);
+#define MAX_TXWH_IDX 5
+#ifdef __cplusplus
+}
+#endif  // __cplusplus
+
+#endif  // AOM_AV1_COMMON_AV1_TXFM_H_