av1/common/av1_inv_txfm2d.c - aom - Git at Google

 /*
  * 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 "config/aom_dsp_rtcd.h"
 #include "config/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"

 void av1_highbd_iwht4x4_16_add_c(const tran_low_t *input, uint8_t *dest8,
                                  int stride, int bd) {
   /* 4-point reversible, orthonormal inverse Walsh-Hadamard in 3.5 adds,
      0.5 shifts per pixel. */
   int i;
   tran_low_t output[16];
   tran_low_t a1, b1, c1, d1, e1;
   const tran_low_t *ip = input;
   tran_low_t *op = output;
   uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);

   for (i = 0; i < 4; i++) {
     a1 = ip[0] >> UNIT_QUANT_SHIFT;
     c1 = ip[1] >> UNIT_QUANT_SHIFT;
     d1 = ip[2] >> UNIT_QUANT_SHIFT;
     b1 = ip[3] >> UNIT_QUANT_SHIFT;
     a1 += c1;
     d1 -= b1;
     e1 = (a1 - d1) >> 1;
     b1 = e1 - b1;
     c1 = e1 - c1;
     a1 -= b1;
     d1 += c1;

     op[0] = a1;
     op[1] = b1;
     op[2] = c1;
     op[3] = d1;
     ip += 4;
     op += 4;
   }

   ip = output;
   for (i = 0; i < 4; i++) {
     a1 = ip[4 * 0];
     c1 = ip[4 * 1];
     d1 = ip[4 * 2];
     b1 = ip[4 * 3];
     a1 += c1;
     d1 -= b1;
     e1 = (a1 - d1) >> 1;
     b1 = e1 - b1;
     c1 = e1 - c1;
     a1 -= b1;
     d1 += c1;

     range_check_value(a1, bd + 1);
     range_check_value(b1, bd + 1);
     range_check_value(c1, bd + 1);
     range_check_value(d1, bd + 1);

     dest[stride * 0] = highbd_clip_pixel_add(dest[stride * 0], a1, bd);
     dest[stride * 1] = highbd_clip_pixel_add(dest[stride * 1], b1, bd);
     dest[stride * 2] = highbd_clip_pixel_add(dest[stride * 2], c1, bd);
     dest[stride * 3] = highbd_clip_pixel_add(dest[stride * 3], d1, bd);

     ip++;
     dest++;
   }
 }

 void av1_highbd_iwht4x4_1_add_c(const tran_low_t *in, uint8_t *dest8,
                                 int dest_stride, int bd) {
   int i;
   tran_low_t a1, e1;
   tran_low_t tmp[4];
   const tran_low_t *ip = in;
   tran_low_t *op = tmp;
   uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
   (void)bd;

   a1 = ip[0] >> UNIT_QUANT_SHIFT;
   e1 = a1 >> 1;
   a1 -= e1;
   op[0] = a1;
   op[1] = op[2] = op[3] = e1;

   ip = tmp;
   for (i = 0; i < 4; i++) {
     e1 = ip[0] >> 1;
     a1 = ip[0] - e1;
     dest[dest_stride * 0] =
         highbd_clip_pixel_add(dest[dest_stride * 0], a1, bd);
     dest[dest_stride * 1] =
         highbd_clip_pixel_add(dest[dest_stride * 1], e1, bd);
     dest[dest_stride * 2] =
         highbd_clip_pixel_add(dest[dest_stride * 2], e1, bd);
     dest[dest_stride * 3] =
         highbd_clip_pixel_add(dest[dest_stride * 3], e1, bd);
     ip++;
     dest++;
   }
 }

 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_DCT64: return av1_idct64_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_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;
     default: assert(0); return NULL;
   }
 }

 static const int8_t inv_shift_4x4[2] = { 0, -4 };
 static const int8_t inv_shift_8x8[2] = { -1, -4 };
 static const int8_t inv_shift_16x16[2] = { -2, -4 };
 static const int8_t inv_shift_32x32[2] = { -2, -4 };
 static const int8_t inv_shift_64x64[2] = { -2, -4 };
 static const int8_t inv_shift_4x8[2] = { 0, -4 };
 static const int8_t inv_shift_8x4[2] = { 0, -4 };
 static const int8_t inv_shift_8x16[2] = { -1, -4 };
 static const int8_t inv_shift_16x8[2] = { -1, -4 };
 static const int8_t inv_shift_16x32[2] = { -1, -4 };
 static const int8_t inv_shift_32x16[2] = { -1, -4 };
 static const int8_t inv_shift_32x64[2] = { -1, -4 };
 static const int8_t inv_shift_64x32[2] = { -1, -4 };
 static const int8_t inv_shift_4x16[2] = { -1, -4 };
 static const int8_t inv_shift_16x4[2] = { -1, -4 };
 static const int8_t inv_shift_8x32[2] = { -2, -4 };
 static const int8_t inv_shift_32x8[2] = { -2, -4 };
 static const int8_t inv_shift_16x64[2] = { -2, -4 };
 static const int8_t inv_shift_64x16[2] = { -2, -4 };

 const int8_t *inv_txfm_shift_ls[TX_SIZES_ALL] = {
   inv_shift_4x4,   inv_shift_8x8,   inv_shift_16x16, inv_shift_32x32,
   inv_shift_64x64, inv_shift_4x8,   inv_shift_8x4,   inv_shift_8x16,
   inv_shift_16x8,  inv_shift_16x32, inv_shift_32x16, inv_shift_32x64,
   inv_shift_64x32, inv_shift_4x16,  inv_shift_16x4,  inv_shift_8x32,
   inv_shift_32x8,  inv_shift_16x64, inv_shift_64x16,
 };

 /* clang-format off */
 const int8_t inv_cos_bit_col[MAX_TXWH_IDX]      // txw_idx
                             [MAX_TXWH_IDX] = {  // txh_idx
     { INV_COS_BIT, INV_COS_BIT, INV_COS_BIT,           0,           0 },
     { INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT,           0 },
     { INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT },
     {           0, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT },
     {           0,           0, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT }
   };

 const int8_t inv_cos_bit_row[MAX_TXWH_IDX]      // txw_idx
                             [MAX_TXWH_IDX] = {  // txh_idx
     { INV_COS_BIT, INV_COS_BIT, INV_COS_BIT,           0,           0 },
     { INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT,           0 },
     { INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT },
     {           0, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT },
     {           0,           0, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT }
   };
 /* clang-format on */

 const int8_t iadst4_range[7] = { 0, 1, 0, 0, 0, 0, 0 };

 void av1_get_inv_txfm_cfg(TX_TYPE tx_type, TX_SIZE tx_size,
                           TXFM_2D_FLIP_CFG *cfg) {
   assert(cfg != NULL);
   cfg->tx_size = tx_size;
   set_flip_cfg(tx_type, cfg);
   av1_zero(cfg->stage_range_col);
   av1_zero(cfg->stage_range_row);
   set_flip_cfg(tx_type, cfg);
   const TX_TYPE_1D tx_type_1d_col = vtx_tab[tx_type];
   const TX_TYPE_1D tx_type_1d_row = htx_tab[tx_type];
   cfg->shift = inv_txfm_shift_ls[tx_size];
   const int txw_idx = get_txw_idx(tx_size);
   const int txh_idx = get_txh_idx(tx_size);
   cfg->cos_bit_col = inv_cos_bit_col[txw_idx][txh_idx];
   cfg->cos_bit_row = inv_cos_bit_row[txw_idx][txh_idx];
   cfg->txfm_type_col = av1_txfm_type_ls[txh_idx][tx_type_1d_col];
   if (cfg->txfm_type_col == TXFM_TYPE_ADST4) {
     memcpy(cfg->stage_range_col, iadst4_range, sizeof(iadst4_range));
   }
   cfg->txfm_type_row = av1_txfm_type_ls[txw_idx][tx_type_1d_row];
   if (cfg->txfm_type_row == TXFM_TYPE_ADST4) {
     memcpy(cfg->stage_range_row, iadst4_range, sizeof(iadst4_range));
   }
   cfg->stage_num_col = av1_txfm_stage_num_list[cfg->txfm_type_col];
   cfg->stage_num_row = av1_txfm_stage_num_list[cfg->txfm_type_row];
 }

 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) {
   const int fwd_shift = inv_start_range[tx_size];
   const int8_t *shift = cfg->shift;
   int8_t opt_range_row, opt_range_col;
   if (bd == 8) {
     opt_range_row = 16;
     opt_range_col = 16;
   } else if (bd == 10) {
     opt_range_row = 18;
     opt_range_col = 16;
   } else {
     assert(bd == 12);
     opt_range_row = 20;
     opt_range_col = 18;
   }
   // i < MAX_TXFM_STAGE_NUM will mute above array bounds warning
   for (int i = 0; i < cfg->stage_num_row && i < MAX_TXFM_STAGE_NUM; ++i) {
     int real_range_row = cfg->stage_range_row[i] + fwd_shift + bd + 1;
     (void)real_range_row;
     if (cfg->txfm_type_row == TXFM_TYPE_ADST4 && i == 1) {
       // the adst4 may use 1 extra bit on top of opt_range_row at stage 1
       // so opt_range_col >= real_range_col will not hold
       stage_range_row[i] = opt_range_row;
     } else {
       assert(opt_range_row >= real_range_row);
       stage_range_row[i] = opt_range_row;
     }
   }
   // i < MAX_TXFM_STAGE_NUM will mute above array bounds warning
   for (int i = 0; i < cfg->stage_num_col && i < MAX_TXFM_STAGE_NUM; ++i) {
     int real_range_col =
         cfg->stage_range_col[i] + fwd_shift + shift[0] + bd + 1;
     (void)real_range_col;
     if (cfg->txfm_type_col == TXFM_TYPE_ADST4 && i == 1) {
       // the adst4 may use 1 extra bit on top of opt_range_row at stage 1
       // so opt_range_col >= real_range_col will not hold
       stage_range_col[i] = opt_range_col;
     } else {
       assert(opt_range_col >= real_range_col);
       stage_range_col[i] = opt_range_col;
     }
   }
 }

 static INLINE void inv_txfm2d_add_c(const int32_t *input, uint16_t *output,
                                     int stride, TXFM_2D_FLIP_CFG *cfg,
                                     int32_t *txfm_buf, TX_SIZE tx_size,
                                     int bd) {
   // Note when assigning txfm_size_col, we use the txfm_size from the
   // row configuration and vice versa. This is intentionally done to
   // accurately perform rectangular transforms. When the transform is
   // rectangular, the number of columns will be the same as the
   // txfm_size stored in the row cfg struct. It will make no difference
   // for square transforms.
   const int txfm_size_col = tx_size_wide[cfg->tx_size];
   const int txfm_size_row = tx_size_high[cfg->tx_size];
   // Take the shift from the larger dimension in the rectangular case.
   const int8_t *shift = cfg->shift;
   const int rect_type = get_rect_tx_log_ratio(txfm_size_col, txfm_size_row);
   int8_t stage_range_row[MAX_TXFM_STAGE_NUM];
   int8_t stage_range_col[MAX_TXFM_STAGE_NUM];
   assert(cfg->stage_num_row <= MAX_TXFM_STAGE_NUM);
   assert(cfg->stage_num_col <= MAX_TXFM_STAGE_NUM);
   av1_gen_inv_stage_range(stage_range_col, stage_range_row, cfg, tx_size, bd);

   const int8_t cos_bit_col = cfg->cos_bit_col;
   const int8_t cos_bit_row = cfg->cos_bit_row;
   const TxfmFunc txfm_func_col = inv_txfm_type_to_func(cfg->txfm_type_col);
   const TxfmFunc txfm_func_row = inv_txfm_type_to_func(cfg->txfm_type_row);

   // txfm_buf's length is  txfm_size_row * txfm_size_col + 2 *
   // AOMMAX(txfm_size_row, txfm_size_col)
   // it is used for intermediate data buffering
   const int buf_offset = AOMMAX(txfm_size_row, txfm_size_col);
   int32_t *temp_in = txfm_buf;
   int32_t *temp_out = temp_in + buf_offset;
   int32_t *buf = temp_out + buf_offset;
   int32_t *buf_ptr = buf;
   int c, r;

   // Rows
   for (r = 0; r < txfm_size_row; ++r) {
     if (abs(rect_type) == 1) {
       for (c = 0; c < txfm_size_col; ++c) {
         temp_in[c] = round_shift((int64_t)input[c] * NewInvSqrt2, NewSqrt2Bits);
       }
       clamp_buf(temp_in, txfm_size_col, bd + 8);
       txfm_func_row(temp_in, buf_ptr, cos_bit_row, stage_range_row);
     } else {
       for (c = 0; c < txfm_size_col; ++c) {
         temp_in[c] = input[c];
       }
       clamp_buf(temp_in, txfm_size_col, bd + 8);
       txfm_func_row(temp_in, buf_ptr, cos_bit_row, stage_range_row);
     }
     av1_round_shift_array(buf_ptr, txfm_size_col, -shift[0]);
     input += txfm_size_col;
     buf_ptr += txfm_size_col;
   }

   // Columns
   for (c = 0; c < txfm_size_col; ++c) {
     if (cfg->lr_flip == 0) {
       for (r = 0; r < txfm_size_row; ++r)
         temp_in[r] = buf[r * txfm_size_col + c];
     } else {
       // flip left right
       for (r = 0; r < txfm_size_row; ++r)
         temp_in[r] = buf[r * txfm_size_col + (txfm_size_col - c - 1)];
     }
     clamp_buf(temp_in, txfm_size_row, AOMMAX(bd + 6, 16));
     txfm_func_col(temp_in, temp_out, cos_bit_col, stage_range_col);
     av1_round_shift_array(temp_out, txfm_size_row, -shift[1]);
     if (cfg->ud_flip == 0) {
       for (r = 0; r < txfm_size_row; ++r) {
         output[r * stride + c] =
             highbd_clip_pixel_add(output[r * stride + c], temp_out[r], bd);
       }
     } else {
       // flip upside down
       for (r = 0; r < txfm_size_row; ++r) {
         output[r * stride + c] = highbd_clip_pixel_add(
             output[r * stride + c], temp_out[txfm_size_row - r - 1], bd);
       }
     }
   }
 }

 static INLINE void inv_txfm2d_add_facade(const int32_t *input, uint16_t *output,
                                          int stride, int32_t *txfm_buf,
                                          TX_TYPE tx_type, TX_SIZE tx_size,
                                          int bd) {
   TXFM_2D_FLIP_CFG cfg;
   av1_get_inv_txfm_cfg(tx_type, tx_size, &cfg);
   // Forward shift sum uses larger square size, to be consistent with what
   // av1_gen_inv_stage_range() does for inverse shifts.
   inv_txfm2d_add_c(input, output, stride, &cfg, txfm_buf, tx_size, bd);
 }

 void av1_inv_txfm2d_add_4x8_c(const int32_t *input, uint16_t *output,
                               int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[4 * 8 + 8 + 8]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_4X8, bd);
 }

 void av1_inv_txfm2d_add_8x4_c(const int32_t *input, uint16_t *output,
                               int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[8 * 4 + 8 + 8]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_8X4, bd);
 }

 void av1_inv_txfm2d_add_8x16_c(const int32_t *input, uint16_t *output,
                                int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[8 * 16 + 16 + 16]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_8X16, bd);
 }

 void av1_inv_txfm2d_add_16x8_c(const int32_t *input, uint16_t *output,
                                int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[16 * 8 + 16 + 16]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_16X8, bd);
 }

 void av1_inv_txfm2d_add_16x32_c(const int32_t *input, uint16_t *output,
                                 int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[16 * 32 + 32 + 32]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_16X32, bd);
 }

 void av1_inv_txfm2d_add_32x16_c(const int32_t *input, uint16_t *output,
                                 int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[32 * 16 + 32 + 32]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_32X16, bd);
 }

 void av1_inv_txfm2d_add_4x4_c(const int32_t *input, uint16_t *output,
                               int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, 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, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, 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, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, 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, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, 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, TX_TYPE tx_type, int bd) {
   // TODO(urvang): Can the same array be reused, instead of using a new array?
   // Remap 32x32 input into a modified 64x64 by:
   // - Copying over these values in top-left 32x32 locations.
   // - Setting the rest of the locations to 0.
   int32_t mod_input[64 * 64];
   for (int row = 0; row < 32; ++row) {
     memcpy(mod_input + row * 64, input + row * 32, 32 * sizeof(*mod_input));
     memset(mod_input + row * 64 + 32, 0, 32 * sizeof(*mod_input));
   }
   memset(mod_input + 32 * 64, 0, 32 * 64 * sizeof(*mod_input));
   DECLARE_ALIGNED(32, int, txfm_buf[64 * 64 + 64 + 64]);
   inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_64X64,
                         bd);
 }

 void av1_inv_txfm2d_add_64x32_c(const int32_t *input, uint16_t *output,
                                 int stride, TX_TYPE tx_type, int bd) {
   // Remap 32x32 input into a modified 64x32 by:
   // - Copying over these values in top-left 32x32 locations.
   // - Setting the rest of the locations to 0.
   int32_t mod_input[64 * 32];
   for (int row = 0; row < 32; ++row) {
     memcpy(mod_input + row * 64, input + row * 32, 32 * sizeof(*mod_input));
     memset(mod_input + row * 64 + 32, 0, 32 * sizeof(*mod_input));
   }
   DECLARE_ALIGNED(32, int, txfm_buf[64 * 32 + 64 + 64]);
   inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_64X32,
                         bd);
 }

 void av1_inv_txfm2d_add_32x64_c(const int32_t *input, uint16_t *output,
                                 int stride, TX_TYPE tx_type, int bd) {
   // Remap 32x32 input into a modified 32x64 input by:
   // - Copying over these values in top-left 32x32 locations.
   // - Setting the rest of the locations to 0.
   int32_t mod_input[32 * 64];
   memcpy(mod_input, input, 32 * 32 * sizeof(*mod_input));
   memset(mod_input + 32 * 32, 0, 32 * 32 * sizeof(*mod_input));
   DECLARE_ALIGNED(32, int, txfm_buf[64 * 32 + 64 + 64]);
   inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_32X64,
                         bd);
 }

 void av1_inv_txfm2d_add_16x64_c(const int32_t *input, uint16_t *output,
                                 int stride, TX_TYPE tx_type, int bd) {
   // Remap 16x32 input into a modified 16x64 input by:
   // - Copying over these values in top-left 16x32 locations.
   // - Setting the rest of the locations to 0.
   int32_t mod_input[16 * 64];
   memcpy(mod_input, input, 16 * 32 * sizeof(*mod_input));
   memset(mod_input + 16 * 32, 0, 16 * 32 * sizeof(*mod_input));
   DECLARE_ALIGNED(32, int, txfm_buf[16 * 64 + 64 + 64]);
   inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_16X64,
                         bd);
 }

 void av1_inv_txfm2d_add_64x16_c(const int32_t *input, uint16_t *output,
                                 int stride, TX_TYPE tx_type, int bd) {
   // Remap 32x16 input into a modified 64x16 by:
   // - Copying over these values in top-left 32x16 locations.
   // - Setting the rest of the locations to 0.
   int32_t mod_input[64 * 16];
   for (int row = 0; row < 16; ++row) {
     memcpy(mod_input + row * 64, input + row * 32, 32 * sizeof(*mod_input));
     memset(mod_input + row * 64 + 32, 0, 32 * sizeof(*mod_input));
   }
   DECLARE_ALIGNED(32, int, txfm_buf[16 * 64 + 64 + 64]);
   inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_64X16,
                         bd);
 }

 void av1_inv_txfm2d_add_4x16_c(const int32_t *input, uint16_t *output,
                                int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[4 * 16 + 16 + 16]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_4X16, bd);
 }

 void av1_inv_txfm2d_add_16x4_c(const int32_t *input, uint16_t *output,
                                int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[4 * 16 + 16 + 16]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_16X4, bd);
 }

 void av1_inv_txfm2d_add_8x32_c(const int32_t *input, uint16_t *output,
                                int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[8 * 32 + 32 + 32]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_8X32, bd);
 }

 void av1_inv_txfm2d_add_32x8_c(const int32_t *input, uint16_t *output,
                                int stride, TX_TYPE tx_type, int bd) {
   DECLARE_ALIGNED(32, int, txfm_buf[8 * 32 + 32 + 32]);
   inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_32X8, bd);
 }
	/*
	* 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 "config/aom_dsp_rtcd.h"
	#include "config/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"

	void av1_highbd_iwht4x4_16_add_c(const tran_low_t input, uint8_t dest8,
	int stride, int bd) {
	/* 4-point reversible, orthonormal inverse Walsh-Hadamard in 3.5 adds,
	0.5 shifts per pixel. */
	int i;
	tran_low_t output[16];
	tran_low_t a1, b1, c1, d1, e1;
	const tran_low_t *ip = input;
	tran_low_t *op = output;
	uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);

	for (i = 0; i < 4; i++) {
	a1 = ip[0] >> UNIT_QUANT_SHIFT;
	c1 = ip[1] >> UNIT_QUANT_SHIFT;
	d1 = ip[2] >> UNIT_QUANT_SHIFT;
	b1 = ip[3] >> UNIT_QUANT_SHIFT;
	a1 += c1;
	d1 -= b1;
	e1 = (a1 - d1) >> 1;
	b1 = e1 - b1;
	c1 = e1 - c1;
	a1 -= b1;
	d1 += c1;

	op[0] = a1;
	op[1] = b1;
	op[2] = c1;
	op[3] = d1;
	ip += 4;
	op += 4;
	}

	ip = output;
	for (i = 0; i < 4; i++) {
	a1 = ip[4 * 0];
	c1 = ip[4 * 1];
	d1 = ip[4 * 2];
	b1 = ip[4 * 3];
	a1 += c1;
	d1 -= b1;
	e1 = (a1 - d1) >> 1;
	b1 = e1 - b1;
	c1 = e1 - c1;
	a1 -= b1;
	d1 += c1;

	range_check_value(a1, bd + 1);
	range_check_value(b1, bd + 1);
	range_check_value(c1, bd + 1);
	range_check_value(d1, bd + 1);

	dest[stride * 0] = highbd_clip_pixel_add(dest[stride * 0], a1, bd);
	dest[stride * 1] = highbd_clip_pixel_add(dest[stride * 1], b1, bd);
	dest[stride * 2] = highbd_clip_pixel_add(dest[stride * 2], c1, bd);
	dest[stride * 3] = highbd_clip_pixel_add(dest[stride * 3], d1, bd);

	ip++;
	dest++;
	}
	}

	void av1_highbd_iwht4x4_1_add_c(const tran_low_t in, uint8_t dest8,
	int dest_stride, int bd) {
	int i;
	tran_low_t a1, e1;
	tran_low_t tmp[4];
	const tran_low_t *ip = in;
	tran_low_t *op = tmp;
	uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
	(void)bd;

	a1 = ip[0] >> UNIT_QUANT_SHIFT;
	e1 = a1 >> 1;
	a1 -= e1;
	op[0] = a1;
	op[1] = op[2] = op[3] = e1;

	ip = tmp;
	for (i = 0; i < 4; i++) {
	e1 = ip[0] >> 1;
	a1 = ip[0] - e1;
	dest[dest_stride * 0] =
	highbd_clip_pixel_add(dest[dest_stride * 0], a1, bd);
	dest[dest_stride * 1] =
	highbd_clip_pixel_add(dest[dest_stride * 1], e1, bd);
	dest[dest_stride * 2] =
	highbd_clip_pixel_add(dest[dest_stride * 2], e1, bd);
	dest[dest_stride * 3] =
	highbd_clip_pixel_add(dest[dest_stride * 3], e1, bd);
	ip++;
	dest++;
	}
	}

	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_DCT64: return av1_idct64_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_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;
	default: assert(0); return NULL;
	}
	}

	static const int8_t inv_shift_4x4[2] = { 0, -4 };
	static const int8_t inv_shift_8x8[2] = { -1, -4 };
	static const int8_t inv_shift_16x16[2] = { -2, -4 };
	static const int8_t inv_shift_32x32[2] = { -2, -4 };
	static const int8_t inv_shift_64x64[2] = { -2, -4 };
	static const int8_t inv_shift_4x8[2] = { 0, -4 };
	static const int8_t inv_shift_8x4[2] = { 0, -4 };
	static const int8_t inv_shift_8x16[2] = { -1, -4 };
	static const int8_t inv_shift_16x8[2] = { -1, -4 };
	static const int8_t inv_shift_16x32[2] = { -1, -4 };
	static const int8_t inv_shift_32x16[2] = { -1, -4 };
	static const int8_t inv_shift_32x64[2] = { -1, -4 };
	static const int8_t inv_shift_64x32[2] = { -1, -4 };
	static const int8_t inv_shift_4x16[2] = { -1, -4 };
	static const int8_t inv_shift_16x4[2] = { -1, -4 };
	static const int8_t inv_shift_8x32[2] = { -2, -4 };
	static const int8_t inv_shift_32x8[2] = { -2, -4 };
	static const int8_t inv_shift_16x64[2] = { -2, -4 };
	static const int8_t inv_shift_64x16[2] = { -2, -4 };

	const int8_t *inv_txfm_shift_ls[TX_SIZES_ALL] = {
	inv_shift_4x4, inv_shift_8x8, inv_shift_16x16, inv_shift_32x32,
	inv_shift_64x64, inv_shift_4x8, inv_shift_8x4, inv_shift_8x16,
	inv_shift_16x8, inv_shift_16x32, inv_shift_32x16, inv_shift_32x64,
	inv_shift_64x32, inv_shift_4x16, inv_shift_16x4, inv_shift_8x32,
	inv_shift_32x8, inv_shift_16x64, inv_shift_64x16,
	};

	/* clang-format off */
	const int8_t inv_cos_bit_col[MAX_TXWH_IDX] // txw_idx
	[MAX_TXWH_IDX] = { // txh_idx
	{ INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, 0, 0 },
	{ INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, 0 },
	{ INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT },
	{ 0, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT },
	{ 0, 0, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT }
	};

	const int8_t inv_cos_bit_row[MAX_TXWH_IDX] // txw_idx
	[MAX_TXWH_IDX] = { // txh_idx
	{ INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, 0, 0 },
	{ INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, 0 },
	{ INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT },
	{ 0, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT },
	{ 0, 0, INV_COS_BIT, INV_COS_BIT, INV_COS_BIT }
	};
	/* clang-format on */

	const int8_t iadst4_range[7] = { 0, 1, 0, 0, 0, 0, 0 };

	void av1_get_inv_txfm_cfg(TX_TYPE tx_type, TX_SIZE tx_size,
	TXFM_2D_FLIP_CFG *cfg) {
	assert(cfg != NULL);
	cfg->tx_size = tx_size;
	set_flip_cfg(tx_type, cfg);
	av1_zero(cfg->stage_range_col);
	av1_zero(cfg->stage_range_row);
	set_flip_cfg(tx_type, cfg);
	const TX_TYPE_1D tx_type_1d_col = vtx_tab[tx_type];
	const TX_TYPE_1D tx_type_1d_row = htx_tab[tx_type];
	cfg->shift = inv_txfm_shift_ls[tx_size];
	const int txw_idx = get_txw_idx(tx_size);
	const int txh_idx = get_txh_idx(tx_size);
	cfg->cos_bit_col = inv_cos_bit_col[txw_idx][txh_idx];
	cfg->cos_bit_row = inv_cos_bit_row[txw_idx][txh_idx];
	cfg->txfm_type_col = av1_txfm_type_ls[txh_idx][tx_type_1d_col];
	if (cfg->txfm_type_col == TXFM_TYPE_ADST4) {
	memcpy(cfg->stage_range_col, iadst4_range, sizeof(iadst4_range));
	}
	cfg->txfm_type_row = av1_txfm_type_ls[txw_idx][tx_type_1d_row];
	if (cfg->txfm_type_row == TXFM_TYPE_ADST4) {
	memcpy(cfg->stage_range_row, iadst4_range, sizeof(iadst4_range));
	}
	cfg->stage_num_col = av1_txfm_stage_num_list[cfg->txfm_type_col];
	cfg->stage_num_row = av1_txfm_stage_num_list[cfg->txfm_type_row];
	}

	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) {
	const int fwd_shift = inv_start_range[tx_size];
	const int8_t *shift = cfg->shift;
	int8_t opt_range_row, opt_range_col;
	if (bd == 8) {
	opt_range_row = 16;
	opt_range_col = 16;
	} else if (bd == 10) {
	opt_range_row = 18;
	opt_range_col = 16;
	} else {
	assert(bd == 12);
	opt_range_row = 20;
	opt_range_col = 18;
	}
	// i < MAX_TXFM_STAGE_NUM will mute above array bounds warning
	for (int i = 0; i < cfg->stage_num_row && i < MAX_TXFM_STAGE_NUM; ++i) {
	int real_range_row = cfg->stage_range_row[i] + fwd_shift + bd + 1;
	(void)real_range_row;
	if (cfg->txfm_type_row == TXFM_TYPE_ADST4 && i == 1) {
	// the adst4 may use 1 extra bit on top of opt_range_row at stage 1
	// so opt_range_col >= real_range_col will not hold
	stage_range_row[i] = opt_range_row;
	} else {
	assert(opt_range_row >= real_range_row);
	stage_range_row[i] = opt_range_row;
	}
	}
	// i < MAX_TXFM_STAGE_NUM will mute above array bounds warning
	for (int i = 0; i < cfg->stage_num_col && i < MAX_TXFM_STAGE_NUM; ++i) {
	int real_range_col =
	cfg->stage_range_col[i] + fwd_shift + shift[0] + bd + 1;
	(void)real_range_col;
	if (cfg->txfm_type_col == TXFM_TYPE_ADST4 && i == 1) {
	// the adst4 may use 1 extra bit on top of opt_range_row at stage 1
	// so opt_range_col >= real_range_col will not hold
	stage_range_col[i] = opt_range_col;
	} else {
	assert(opt_range_col >= real_range_col);
	stage_range_col[i] = opt_range_col;
	}
	}
	}

	static INLINE void inv_txfm2d_add_c(const int32_t input, uint16_t output,
	int stride, TXFM_2D_FLIP_CFG *cfg,
	int32_t *txfm_buf, TX_SIZE tx_size,
	int bd) {
	// Note when assigning txfm_size_col, we use the txfm_size from the
	// row configuration and vice versa. This is intentionally done to
	// accurately perform rectangular transforms. When the transform is
	// rectangular, the number of columns will be the same as the
	// txfm_size stored in the row cfg struct. It will make no difference
	// for square transforms.
	const int txfm_size_col = tx_size_wide[cfg->tx_size];
	const int txfm_size_row = tx_size_high[cfg->tx_size];
	// Take the shift from the larger dimension in the rectangular case.
	const int8_t *shift = cfg->shift;
	const int rect_type = get_rect_tx_log_ratio(txfm_size_col, txfm_size_row);
	int8_t stage_range_row[MAX_TXFM_STAGE_NUM];
	int8_t stage_range_col[MAX_TXFM_STAGE_NUM];
	assert(cfg->stage_num_row <= MAX_TXFM_STAGE_NUM);
	assert(cfg->stage_num_col <= MAX_TXFM_STAGE_NUM);
	av1_gen_inv_stage_range(stage_range_col, stage_range_row, cfg, tx_size, bd);

	const int8_t cos_bit_col = cfg->cos_bit_col;
	const int8_t cos_bit_row = cfg->cos_bit_row;
	const TxfmFunc txfm_func_col = inv_txfm_type_to_func(cfg->txfm_type_col);
	const TxfmFunc txfm_func_row = inv_txfm_type_to_func(cfg->txfm_type_row);

	// txfm_buf's length is txfm_size_row * txfm_size_col + 2 *
	// AOMMAX(txfm_size_row, txfm_size_col)
	// it is used for intermediate data buffering
	const int buf_offset = AOMMAX(txfm_size_row, txfm_size_col);
	int32_t *temp_in = txfm_buf;
	int32_t *temp_out = temp_in + buf_offset;
	int32_t *buf = temp_out + buf_offset;
	int32_t *buf_ptr = buf;
	int c, r;

	// Rows
	for (r = 0; r < txfm_size_row; ++r) {
	if (abs(rect_type) == 1) {
	for (c = 0; c < txfm_size_col; ++c) {
	temp_in[c] = round_shift((int64_t)input[c] * NewInvSqrt2, NewSqrt2Bits);
	}
	clamp_buf(temp_in, txfm_size_col, bd + 8);
	txfm_func_row(temp_in, buf_ptr, cos_bit_row, stage_range_row);
	} else {
	for (c = 0; c < txfm_size_col; ++c) {
	temp_in[c] = input[c];
	}
	clamp_buf(temp_in, txfm_size_col, bd + 8);
	txfm_func_row(temp_in, buf_ptr, cos_bit_row, stage_range_row);
	}
	av1_round_shift_array(buf_ptr, txfm_size_col, -shift[0]);
	input += txfm_size_col;
	buf_ptr += txfm_size_col;
	}

	// Columns
	for (c = 0; c < txfm_size_col; ++c) {
	if (cfg->lr_flip == 0) {
	for (r = 0; r < txfm_size_row; ++r)
	temp_in[r] = buf[r * txfm_size_col + c];
	} else {
	// flip left right
	for (r = 0; r < txfm_size_row; ++r)
	temp_in[r] = buf[r * txfm_size_col + (txfm_size_col - c - 1)];
	}
	clamp_buf(temp_in, txfm_size_row, AOMMAX(bd + 6, 16));
	txfm_func_col(temp_in, temp_out, cos_bit_col, stage_range_col);
	av1_round_shift_array(temp_out, txfm_size_row, -shift[1]);
	if (cfg->ud_flip == 0) {
	for (r = 0; r < txfm_size_row; ++r) {
	output[r * stride + c] =
	highbd_clip_pixel_add(output[r * stride + c], temp_out[r], bd);
	}
	} else {
	// flip upside down
	for (r = 0; r < txfm_size_row; ++r) {
	output[r * stride + c] = highbd_clip_pixel_add(
	output[r * stride + c], temp_out[txfm_size_row - r - 1], bd);
	}
	}
	}
	}

	static INLINE void inv_txfm2d_add_facade(const int32_t input, uint16_t output,
	int stride, int32_t *txfm_buf,
	TX_TYPE tx_type, TX_SIZE tx_size,
	int bd) {
	TXFM_2D_FLIP_CFG cfg;
	av1_get_inv_txfm_cfg(tx_type, tx_size, &cfg);
	// Forward shift sum uses larger square size, to be consistent with what
	// av1_gen_inv_stage_range() does for inverse shifts.
	inv_txfm2d_add_c(input, output, stride, &cfg, txfm_buf, tx_size, bd);
	}

	void av1_inv_txfm2d_add_4x8_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[4 * 8 + 8 + 8]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_4X8, bd);
	}

	void av1_inv_txfm2d_add_8x4_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[8 * 4 + 8 + 8]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_8X4, bd);
	}

	void av1_inv_txfm2d_add_8x16_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[8 * 16 + 16 + 16]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_8X16, bd);
	}

	void av1_inv_txfm2d_add_16x8_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[16 * 8 + 16 + 16]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_16X8, bd);
	}

	void av1_inv_txfm2d_add_16x32_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[16 * 32 + 32 + 32]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_16X32, bd);
	}

	void av1_inv_txfm2d_add_32x16_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[32 * 16 + 32 + 32]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_32X16, bd);
	}

	void av1_inv_txfm2d_add_4x4_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, 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, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, 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, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, 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, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, 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, TX_TYPE tx_type, int bd) {
	// TODO(urvang): Can the same array be reused, instead of using a new array?
	// Remap 32x32 input into a modified 64x64 by:
	// - Copying over these values in top-left 32x32 locations.
	// - Setting the rest of the locations to 0.
	int32_t mod_input[64 * 64];
	for (int row = 0; row < 32; ++row) {
	memcpy(mod_input + row * 64, input + row * 32, 32 * sizeof(*mod_input));
	memset(mod_input + row * 64 + 32, 0, 32 * sizeof(*mod_input));
	}
	memset(mod_input + 32 * 64, 0, 32 * 64 * sizeof(*mod_input));
	DECLARE_ALIGNED(32, int, txfm_buf[64 * 64 + 64 + 64]);
	inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_64X64,
	bd);
	}

	void av1_inv_txfm2d_add_64x32_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	// Remap 32x32 input into a modified 64x32 by:
	// - Copying over these values in top-left 32x32 locations.
	// - Setting the rest of the locations to 0.
	int32_t mod_input[64 * 32];
	for (int row = 0; row < 32; ++row) {
	memcpy(mod_input + row * 64, input + row * 32, 32 * sizeof(*mod_input));
	memset(mod_input + row * 64 + 32, 0, 32 * sizeof(*mod_input));
	}
	DECLARE_ALIGNED(32, int, txfm_buf[64 * 32 + 64 + 64]);
	inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_64X32,
	bd);
	}

	void av1_inv_txfm2d_add_32x64_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	// Remap 32x32 input into a modified 32x64 input by:
	// - Copying over these values in top-left 32x32 locations.
	// - Setting the rest of the locations to 0.
	int32_t mod_input[32 * 64];
	memcpy(mod_input, input, 32 * 32 * sizeof(*mod_input));
	memset(mod_input + 32 * 32, 0, 32 * 32 * sizeof(*mod_input));
	DECLARE_ALIGNED(32, int, txfm_buf[64 * 32 + 64 + 64]);
	inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_32X64,
	bd);
	}

	void av1_inv_txfm2d_add_16x64_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	// Remap 16x32 input into a modified 16x64 input by:
	// - Copying over these values in top-left 16x32 locations.
	// - Setting the rest of the locations to 0.
	int32_t mod_input[16 * 64];
	memcpy(mod_input, input, 16 * 32 * sizeof(*mod_input));
	memset(mod_input + 16 * 32, 0, 16 * 32 * sizeof(*mod_input));
	DECLARE_ALIGNED(32, int, txfm_buf[16 * 64 + 64 + 64]);
	inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_16X64,
	bd);
	}

	void av1_inv_txfm2d_add_64x16_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	// Remap 32x16 input into a modified 64x16 by:
	// - Copying over these values in top-left 32x16 locations.
	// - Setting the rest of the locations to 0.
	int32_t mod_input[64 * 16];
	for (int row = 0; row < 16; ++row) {
	memcpy(mod_input + row * 64, input + row * 32, 32 * sizeof(*mod_input));
	memset(mod_input + row * 64 + 32, 0, 32 * sizeof(*mod_input));
	}
	DECLARE_ALIGNED(32, int, txfm_buf[16 * 64 + 64 + 64]);
	inv_txfm2d_add_facade(mod_input, output, stride, txfm_buf, tx_type, TX_64X16,
	bd);
	}

	void av1_inv_txfm2d_add_4x16_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[4 * 16 + 16 + 16]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_4X16, bd);
	}

	void av1_inv_txfm2d_add_16x4_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[4 * 16 + 16 + 16]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_16X4, bd);
	}

	void av1_inv_txfm2d_add_8x32_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[8 * 32 + 32 + 32]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_8X32, bd);
	}

	void av1_inv_txfm2d_add_32x8_c(const int32_t input, uint16_t output,
	int stride, TX_TYPE tx_type, int bd) {
	DECLARE_ALIGNED(32, int, txfm_buf[8 * 32 + 32 + 32]);
	inv_txfm2d_add_facade(input, output, stride, txfm_buf, tx_type, TX_32X8, bd);
	}