diff options
Diffstat (limited to 'third_party/aom/aom_dsp/inv_txfm.c')
| -rw-r--r-- | third_party/aom/aom_dsp/inv_txfm.c | 1445 |
1 files changed, 1445 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/inv_txfm.c b/third_party/aom/aom_dsp/inv_txfm.c new file mode 100644 index 000000000..bb995856a --- /dev/null +++ b/third_party/aom/aom_dsp/inv_txfm.c @@ -0,0 +1,1445 @@ +/* + * 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 <math.h> +#include <string.h> + +#include "./aom_dsp_rtcd.h" +#include "aom_dsp/inv_txfm.h" + +void aom_iwht4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int stride) { + /* 4-point reversible, orthonormal inverse Walsh-Hadamard in 3.5 adds, + 0.5 shifts per pixel. */ + int i; + tran_low_t output[16]; + tran_high_t a1, b1, c1, d1, e1; + const tran_low_t *ip = input; + tran_low_t *op = output; + + 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] = WRAPLOW(a1); + op[1] = WRAPLOW(b1); + op[2] = WRAPLOW(c1); + op[3] = WRAPLOW(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; + dest[stride * 0] = clip_pixel_add(dest[stride * 0], WRAPLOW(a1)); + dest[stride * 1] = clip_pixel_add(dest[stride * 1], WRAPLOW(b1)); + dest[stride * 2] = clip_pixel_add(dest[stride * 2], WRAPLOW(c1)); + dest[stride * 3] = clip_pixel_add(dest[stride * 3], WRAPLOW(d1)); + + ip++; + dest++; + } +} + +void aom_iwht4x4_1_add_c(const tran_low_t *in, uint8_t *dest, int dest_stride) { + int i; + tran_high_t a1, e1; + tran_low_t tmp[4]; + const tran_low_t *ip = in; + tran_low_t *op = tmp; + + a1 = ip[0] >> UNIT_QUANT_SHIFT; + e1 = a1 >> 1; + a1 -= e1; + op[0] = WRAPLOW(a1); + op[1] = op[2] = op[3] = WRAPLOW(e1); + + ip = tmp; + for (i = 0; i < 4; i++) { + e1 = ip[0] >> 1; + a1 = ip[0] - e1; + dest[dest_stride * 0] = clip_pixel_add(dest[dest_stride * 0], a1); + dest[dest_stride * 1] = clip_pixel_add(dest[dest_stride * 1], e1); + dest[dest_stride * 2] = clip_pixel_add(dest[dest_stride * 2], e1); + dest[dest_stride * 3] = clip_pixel_add(dest[dest_stride * 3], e1); + ip++; + dest++; + } +} + +void aom_idct4_c(const tran_low_t *input, tran_low_t *output) { + tran_low_t step[4]; + tran_high_t temp1, temp2; + // stage 1 + temp1 = (input[0] + input[2]) * cospi_16_64; + temp2 = (input[0] - input[2]) * cospi_16_64; + step[0] = WRAPLOW(dct_const_round_shift(temp1)); + step[1] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64; + temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64; + step[2] = WRAPLOW(dct_const_round_shift(temp1)); + step[3] = WRAPLOW(dct_const_round_shift(temp2)); + + // stage 2 + output[0] = WRAPLOW(step[0] + step[3]); + output[1] = WRAPLOW(step[1] + step[2]); + output[2] = WRAPLOW(step[1] - step[2]); + output[3] = WRAPLOW(step[0] - step[3]); +} + +void aom_idct4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int stride) { + tran_low_t out[4 * 4]; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[4], temp_out[4]; + + // Rows + for (i = 0; i < 4; ++i) { + aom_idct4_c(input, outptr); + input += 4; + outptr += 4; + } + + // Columns + for (i = 0; i < 4; ++i) { + for (j = 0; j < 4; ++j) temp_in[j] = out[j * 4 + i]; + aom_idct4_c(temp_in, temp_out); + for (j = 0; j < 4; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 4)); + } + } +} + +void aom_idct4x4_1_add_c(const tran_low_t *input, uint8_t *dest, + int dest_stride) { + int i; + tran_high_t a1; + tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64)); + out = WRAPLOW(dct_const_round_shift(out * cospi_16_64)); + a1 = ROUND_POWER_OF_TWO(out, 4); + + if (a1 == 0) return; + + for (i = 0; i < 4; i++) { + dest[0] = clip_pixel_add(dest[0], a1); + dest[1] = clip_pixel_add(dest[1], a1); + dest[2] = clip_pixel_add(dest[2], a1); + dest[3] = clip_pixel_add(dest[3], a1); + dest += dest_stride; + } +} + +void aom_idct8_c(const tran_low_t *input, tran_low_t *output) { + tran_low_t step1[8], step2[8]; + tran_high_t temp1, temp2; + // stage 1 + step1[0] = input[0]; + step1[2] = input[4]; + step1[1] = input[2]; + step1[3] = input[6]; + temp1 = input[1] * cospi_28_64 - input[7] * cospi_4_64; + temp2 = input[1] * cospi_4_64 + input[7] * cospi_28_64; + step1[4] = WRAPLOW(dct_const_round_shift(temp1)); + step1[7] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = input[5] * cospi_12_64 - input[3] * cospi_20_64; + temp2 = input[5] * cospi_20_64 + input[3] * cospi_12_64; + step1[5] = WRAPLOW(dct_const_round_shift(temp1)); + step1[6] = WRAPLOW(dct_const_round_shift(temp2)); + + // stage 2 + temp1 = (step1[0] + step1[2]) * cospi_16_64; + temp2 = (step1[0] - step1[2]) * cospi_16_64; + step2[0] = WRAPLOW(dct_const_round_shift(temp1)); + step2[1] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = step1[1] * cospi_24_64 - step1[3] * cospi_8_64; + temp2 = step1[1] * cospi_8_64 + step1[3] * cospi_24_64; + step2[2] = WRAPLOW(dct_const_round_shift(temp1)); + step2[3] = WRAPLOW(dct_const_round_shift(temp2)); + step2[4] = WRAPLOW(step1[4] + step1[5]); + step2[5] = WRAPLOW(step1[4] - step1[5]); + step2[6] = WRAPLOW(-step1[6] + step1[7]); + step2[7] = WRAPLOW(step1[6] + step1[7]); + + // stage 3 + step1[0] = WRAPLOW(step2[0] + step2[3]); + step1[1] = WRAPLOW(step2[1] + step2[2]); + step1[2] = WRAPLOW(step2[1] - step2[2]); + step1[3] = WRAPLOW(step2[0] - step2[3]); + step1[4] = step2[4]; + temp1 = (step2[6] - step2[5]) * cospi_16_64; + temp2 = (step2[5] + step2[6]) * cospi_16_64; + step1[5] = WRAPLOW(dct_const_round_shift(temp1)); + step1[6] = WRAPLOW(dct_const_round_shift(temp2)); + step1[7] = step2[7]; + + // stage 4 + output[0] = WRAPLOW(step1[0] + step1[7]); + output[1] = WRAPLOW(step1[1] + step1[6]); + output[2] = WRAPLOW(step1[2] + step1[5]); + output[3] = WRAPLOW(step1[3] + step1[4]); + output[4] = WRAPLOW(step1[3] - step1[4]); + output[5] = WRAPLOW(step1[2] - step1[5]); + output[6] = WRAPLOW(step1[1] - step1[6]); + output[7] = WRAPLOW(step1[0] - step1[7]); +} + +void aom_idct8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int stride) { + tran_low_t out[8 * 8]; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[8], temp_out[8]; + + // First transform rows + for (i = 0; i < 8; ++i) { + aom_idct8_c(input, outptr); + input += 8; + outptr += 8; + } + + // Then transform columns + for (i = 0; i < 8; ++i) { + for (j = 0; j < 8; ++j) temp_in[j] = out[j * 8 + i]; + aom_idct8_c(temp_in, temp_out); + for (j = 0; j < 8; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 5)); + } + } +} + +void aom_idct8x8_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) { + int i, j; + tran_high_t a1; + tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64)); + out = WRAPLOW(dct_const_round_shift(out * cospi_16_64)); + a1 = ROUND_POWER_OF_TWO(out, 5); + if (a1 == 0) return; + for (j = 0; j < 8; ++j) { + for (i = 0; i < 8; ++i) dest[i] = clip_pixel_add(dest[i], a1); + dest += stride; + } +} + +void aom_iadst4_c(const tran_low_t *input, tran_low_t *output) { + tran_high_t s0, s1, s2, s3, s4, s5, s6, s7; + + tran_low_t x0 = input[0]; + tran_low_t x1 = input[1]; + tran_low_t x2 = input[2]; + tran_low_t x3 = input[3]; + + if (!(x0 | x1 | x2 | x3)) { + output[0] = output[1] = output[2] = output[3] = 0; + return; + } + + s0 = sinpi_1_9 * x0; + s1 = sinpi_2_9 * x0; + s2 = sinpi_3_9 * x1; + s3 = sinpi_4_9 * x2; + s4 = sinpi_1_9 * x2; + s5 = sinpi_2_9 * x3; + s6 = sinpi_4_9 * x3; + s7 = WRAPLOW(x0 - x2 + x3); + + s0 = s0 + s3 + s5; + s1 = s1 - s4 - s6; + s3 = s2; + s2 = sinpi_3_9 * s7; + + // 1-D transform scaling factor is sqrt(2). + // The overall dynamic range is 14b (input) + 14b (multiplication scaling) + // + 1b (addition) = 29b. + // Hence the output bit depth is 15b. + output[0] = WRAPLOW(dct_const_round_shift(s0 + s3)); + output[1] = WRAPLOW(dct_const_round_shift(s1 + s3)); + output[2] = WRAPLOW(dct_const_round_shift(s2)); + output[3] = WRAPLOW(dct_const_round_shift(s0 + s1 - s3)); +} + +void aom_iadst8_c(const tran_low_t *input, tran_low_t *output) { + int s0, s1, s2, s3, s4, s5, s6, s7; + + tran_high_t x0 = input[7]; + tran_high_t x1 = input[0]; + tran_high_t x2 = input[5]; + tran_high_t x3 = input[2]; + tran_high_t x4 = input[3]; + tran_high_t x5 = input[4]; + tran_high_t x6 = input[1]; + tran_high_t x7 = input[6]; + + if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7)) { + output[0] = output[1] = output[2] = output[3] = output[4] = output[5] = + output[6] = output[7] = 0; + return; + } + + // stage 1 + s0 = (int)(cospi_2_64 * x0 + cospi_30_64 * x1); + s1 = (int)(cospi_30_64 * x0 - cospi_2_64 * x1); + s2 = (int)(cospi_10_64 * x2 + cospi_22_64 * x3); + s3 = (int)(cospi_22_64 * x2 - cospi_10_64 * x3); + s4 = (int)(cospi_18_64 * x4 + cospi_14_64 * x5); + s5 = (int)(cospi_14_64 * x4 - cospi_18_64 * x5); + s6 = (int)(cospi_26_64 * x6 + cospi_6_64 * x7); + s7 = (int)(cospi_6_64 * x6 - cospi_26_64 * x7); + + x0 = WRAPLOW(dct_const_round_shift(s0 + s4)); + x1 = WRAPLOW(dct_const_round_shift(s1 + s5)); + x2 = WRAPLOW(dct_const_round_shift(s2 + s6)); + x3 = WRAPLOW(dct_const_round_shift(s3 + s7)); + x4 = WRAPLOW(dct_const_round_shift(s0 - s4)); + x5 = WRAPLOW(dct_const_round_shift(s1 - s5)); + x6 = WRAPLOW(dct_const_round_shift(s2 - s6)); + x7 = WRAPLOW(dct_const_round_shift(s3 - s7)); + + // stage 2 + s0 = (int)x0; + s1 = (int)x1; + s2 = (int)x2; + s3 = (int)x3; + s4 = (int)(cospi_8_64 * x4 + cospi_24_64 * x5); + s5 = (int)(cospi_24_64 * x4 - cospi_8_64 * x5); + s6 = (int)(-cospi_24_64 * x6 + cospi_8_64 * x7); + s7 = (int)(cospi_8_64 * x6 + cospi_24_64 * x7); + + x0 = WRAPLOW(s0 + s2); + x1 = WRAPLOW(s1 + s3); + x2 = WRAPLOW(s0 - s2); + x3 = WRAPLOW(s1 - s3); + x4 = WRAPLOW(dct_const_round_shift(s4 + s6)); + x5 = WRAPLOW(dct_const_round_shift(s5 + s7)); + x6 = WRAPLOW(dct_const_round_shift(s4 - s6)); + x7 = WRAPLOW(dct_const_round_shift(s5 - s7)); + + // stage 3 + s2 = (int)(cospi_16_64 * (x2 + x3)); + s3 = (int)(cospi_16_64 * (x2 - x3)); + s6 = (int)(cospi_16_64 * (x6 + x7)); + s7 = (int)(cospi_16_64 * (x6 - x7)); + + x2 = WRAPLOW(dct_const_round_shift(s2)); + x3 = WRAPLOW(dct_const_round_shift(s3)); + x6 = WRAPLOW(dct_const_round_shift(s6)); + x7 = WRAPLOW(dct_const_round_shift(s7)); + + output[0] = WRAPLOW(x0); + output[1] = WRAPLOW(-x4); + output[2] = WRAPLOW(x6); + output[3] = WRAPLOW(-x2); + output[4] = WRAPLOW(x3); + output[5] = WRAPLOW(-x7); + output[6] = WRAPLOW(x5); + output[7] = WRAPLOW(-x1); +} + +void aom_idct8x8_12_add_c(const tran_low_t *input, uint8_t *dest, int stride) { + tran_low_t out[8 * 8] = { 0 }; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[8], temp_out[8]; + + // First transform rows + // only first 4 row has non-zero coefs + for (i = 0; i < 4; ++i) { + aom_idct8_c(input, outptr); + input += 8; + outptr += 8; + } + + // Then transform columns + for (i = 0; i < 8; ++i) { + for (j = 0; j < 8; ++j) temp_in[j] = out[j * 8 + i]; + aom_idct8_c(temp_in, temp_out); + for (j = 0; j < 8; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 5)); + } + } +} + +void aom_idct16_c(const tran_low_t *input, tran_low_t *output) { + tran_low_t step1[16], step2[16]; + tran_high_t temp1, temp2; + + // stage 1 + step1[0] = input[0 / 2]; + step1[1] = input[16 / 2]; + step1[2] = input[8 / 2]; + step1[3] = input[24 / 2]; + step1[4] = input[4 / 2]; + step1[5] = input[20 / 2]; + step1[6] = input[12 / 2]; + step1[7] = input[28 / 2]; + step1[8] = input[2 / 2]; + step1[9] = input[18 / 2]; + step1[10] = input[10 / 2]; + step1[11] = input[26 / 2]; + step1[12] = input[6 / 2]; + step1[13] = input[22 / 2]; + step1[14] = input[14 / 2]; + step1[15] = input[30 / 2]; + + // stage 2 + step2[0] = step1[0]; + step2[1] = step1[1]; + step2[2] = step1[2]; + step2[3] = step1[3]; + step2[4] = step1[4]; + step2[5] = step1[5]; + step2[6] = step1[6]; + step2[7] = step1[7]; + + temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64; + temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64; + step2[8] = WRAPLOW(dct_const_round_shift(temp1)); + step2[15] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64; + temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64; + step2[9] = WRAPLOW(dct_const_round_shift(temp1)); + step2[14] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64; + temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64; + step2[10] = WRAPLOW(dct_const_round_shift(temp1)); + step2[13] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64; + temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64; + step2[11] = WRAPLOW(dct_const_round_shift(temp1)); + step2[12] = WRAPLOW(dct_const_round_shift(temp2)); + + // stage 3 + step1[0] = step2[0]; + step1[1] = step2[1]; + step1[2] = step2[2]; + step1[3] = step2[3]; + + temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64; + temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64; + step1[4] = WRAPLOW(dct_const_round_shift(temp1)); + step1[7] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64; + temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64; + step1[5] = WRAPLOW(dct_const_round_shift(temp1)); + step1[6] = WRAPLOW(dct_const_round_shift(temp2)); + + step1[8] = WRAPLOW(step2[8] + step2[9]); + step1[9] = WRAPLOW(step2[8] - step2[9]); + step1[10] = WRAPLOW(-step2[10] + step2[11]); + step1[11] = WRAPLOW(step2[10] + step2[11]); + step1[12] = WRAPLOW(step2[12] + step2[13]); + step1[13] = WRAPLOW(step2[12] - step2[13]); + step1[14] = WRAPLOW(-step2[14] + step2[15]); + step1[15] = WRAPLOW(step2[14] + step2[15]); + + // stage 4 + temp1 = (step1[0] + step1[1]) * cospi_16_64; + temp2 = (step1[0] - step1[1]) * cospi_16_64; + step2[0] = WRAPLOW(dct_const_round_shift(temp1)); + step2[1] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64; + temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64; + step2[2] = WRAPLOW(dct_const_round_shift(temp1)); + step2[3] = WRAPLOW(dct_const_round_shift(temp2)); + step2[4] = WRAPLOW(step1[4] + step1[5]); + step2[5] = WRAPLOW(step1[4] - step1[5]); + step2[6] = WRAPLOW(-step1[6] + step1[7]); + step2[7] = WRAPLOW(step1[6] + step1[7]); + + step2[8] = step1[8]; + step2[15] = step1[15]; + temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64; + temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64; + step2[9] = WRAPLOW(dct_const_round_shift(temp1)); + step2[14] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64; + temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64; + step2[10] = WRAPLOW(dct_const_round_shift(temp1)); + step2[13] = WRAPLOW(dct_const_round_shift(temp2)); + step2[11] = step1[11]; + step2[12] = step1[12]; + + // stage 5 + step1[0] = WRAPLOW(step2[0] + step2[3]); + step1[1] = WRAPLOW(step2[1] + step2[2]); + step1[2] = WRAPLOW(step2[1] - step2[2]); + step1[3] = WRAPLOW(step2[0] - step2[3]); + step1[4] = step2[4]; + temp1 = (step2[6] - step2[5]) * cospi_16_64; + temp2 = (step2[5] + step2[6]) * cospi_16_64; + step1[5] = WRAPLOW(dct_const_round_shift(temp1)); + step1[6] = WRAPLOW(dct_const_round_shift(temp2)); + step1[7] = step2[7]; + + step1[8] = WRAPLOW(step2[8] + step2[11]); + step1[9] = WRAPLOW(step2[9] + step2[10]); + step1[10] = WRAPLOW(step2[9] - step2[10]); + step1[11] = WRAPLOW(step2[8] - step2[11]); + step1[12] = WRAPLOW(-step2[12] + step2[15]); + step1[13] = WRAPLOW(-step2[13] + step2[14]); + step1[14] = WRAPLOW(step2[13] + step2[14]); + step1[15] = WRAPLOW(step2[12] + step2[15]); + + // stage 6 + step2[0] = WRAPLOW(step1[0] + step1[7]); + step2[1] = WRAPLOW(step1[1] + step1[6]); + step2[2] = WRAPLOW(step1[2] + step1[5]); + step2[3] = WRAPLOW(step1[3] + step1[4]); + step2[4] = WRAPLOW(step1[3] - step1[4]); + step2[5] = WRAPLOW(step1[2] - step1[5]); + step2[6] = WRAPLOW(step1[1] - step1[6]); + step2[7] = WRAPLOW(step1[0] - step1[7]); + step2[8] = step1[8]; + step2[9] = step1[9]; + temp1 = (-step1[10] + step1[13]) * cospi_16_64; + temp2 = (step1[10] + step1[13]) * cospi_16_64; + step2[10] = WRAPLOW(dct_const_round_shift(temp1)); + step2[13] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = (-step1[11] + step1[12]) * cospi_16_64; + temp2 = (step1[11] + step1[12]) * cospi_16_64; + step2[11] = WRAPLOW(dct_const_round_shift(temp1)); + step2[12] = WRAPLOW(dct_const_round_shift(temp2)); + step2[14] = step1[14]; + step2[15] = step1[15]; + + // stage 7 + output[0] = WRAPLOW(step2[0] + step2[15]); + output[1] = WRAPLOW(step2[1] + step2[14]); + output[2] = WRAPLOW(step2[2] + step2[13]); + output[3] = WRAPLOW(step2[3] + step2[12]); + output[4] = WRAPLOW(step2[4] + step2[11]); + output[5] = WRAPLOW(step2[5] + step2[10]); + output[6] = WRAPLOW(step2[6] + step2[9]); + output[7] = WRAPLOW(step2[7] + step2[8]); + output[8] = WRAPLOW(step2[7] - step2[8]); + output[9] = WRAPLOW(step2[6] - step2[9]); + output[10] = WRAPLOW(step2[5] - step2[10]); + output[11] = WRAPLOW(step2[4] - step2[11]); + output[12] = WRAPLOW(step2[3] - step2[12]); + output[13] = WRAPLOW(step2[2] - step2[13]); + output[14] = WRAPLOW(step2[1] - step2[14]); + output[15] = WRAPLOW(step2[0] - step2[15]); +} + +void aom_idct16x16_256_add_c(const tran_low_t *input, uint8_t *dest, + int stride) { + tran_low_t out[16 * 16]; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[16], temp_out[16]; + + // First transform rows + for (i = 0; i < 16; ++i) { + aom_idct16_c(input, outptr); + input += 16; + outptr += 16; + } + + // Then transform columns + for (i = 0; i < 16; ++i) { + for (j = 0; j < 16; ++j) temp_in[j] = out[j * 16 + i]; + aom_idct16_c(temp_in, temp_out); + for (j = 0; j < 16; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 6)); + } + } +} + +void aom_iadst16_c(const tran_low_t *input, tran_low_t *output) { + tran_high_t s0, s1, s2, s3, s4, s5, s6, s7, s8; + tran_high_t s9, s10, s11, s12, s13, s14, s15; + + tran_high_t x0 = input[15]; + tran_high_t x1 = input[0]; + tran_high_t x2 = input[13]; + tran_high_t x3 = input[2]; + tran_high_t x4 = input[11]; + tran_high_t x5 = input[4]; + tran_high_t x6 = input[9]; + tran_high_t x7 = input[6]; + tran_high_t x8 = input[7]; + tran_high_t x9 = input[8]; + tran_high_t x10 = input[5]; + tran_high_t x11 = input[10]; + tran_high_t x12 = input[3]; + tran_high_t x13 = input[12]; + tran_high_t x14 = input[1]; + tran_high_t x15 = input[14]; + + if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | x10 | x11 | x12 | + x13 | x14 | x15)) { + output[0] = output[1] = output[2] = output[3] = output[4] = output[5] = + output[6] = output[7] = output[8] = output[9] = output[10] = + output[11] = output[12] = output[13] = output[14] = output[15] = 0; + return; + } + + // stage 1 + s0 = x0 * cospi_1_64 + x1 * cospi_31_64; + s1 = x0 * cospi_31_64 - x1 * cospi_1_64; + s2 = x2 * cospi_5_64 + x3 * cospi_27_64; + s3 = x2 * cospi_27_64 - x3 * cospi_5_64; + s4 = x4 * cospi_9_64 + x5 * cospi_23_64; + s5 = x4 * cospi_23_64 - x5 * cospi_9_64; + s6 = x6 * cospi_13_64 + x7 * cospi_19_64; + s7 = x6 * cospi_19_64 - x7 * cospi_13_64; + s8 = x8 * cospi_17_64 + x9 * cospi_15_64; + s9 = x8 * cospi_15_64 - x9 * cospi_17_64; + s10 = x10 * cospi_21_64 + x11 * cospi_11_64; + s11 = x10 * cospi_11_64 - x11 * cospi_21_64; + s12 = x12 * cospi_25_64 + x13 * cospi_7_64; + s13 = x12 * cospi_7_64 - x13 * cospi_25_64; + s14 = x14 * cospi_29_64 + x15 * cospi_3_64; + s15 = x14 * cospi_3_64 - x15 * cospi_29_64; + + x0 = WRAPLOW(dct_const_round_shift(s0 + s8)); + x1 = WRAPLOW(dct_const_round_shift(s1 + s9)); + x2 = WRAPLOW(dct_const_round_shift(s2 + s10)); + x3 = WRAPLOW(dct_const_round_shift(s3 + s11)); + x4 = WRAPLOW(dct_const_round_shift(s4 + s12)); + x5 = WRAPLOW(dct_const_round_shift(s5 + s13)); + x6 = WRAPLOW(dct_const_round_shift(s6 + s14)); + x7 = WRAPLOW(dct_const_round_shift(s7 + s15)); + x8 = WRAPLOW(dct_const_round_shift(s0 - s8)); + x9 = WRAPLOW(dct_const_round_shift(s1 - s9)); + x10 = WRAPLOW(dct_const_round_shift(s2 - s10)); + x11 = WRAPLOW(dct_const_round_shift(s3 - s11)); + x12 = WRAPLOW(dct_const_round_shift(s4 - s12)); + x13 = WRAPLOW(dct_const_round_shift(s5 - s13)); + x14 = WRAPLOW(dct_const_round_shift(s6 - s14)); + x15 = WRAPLOW(dct_const_round_shift(s7 - s15)); + + // stage 2 + s0 = x0; + s1 = x1; + s2 = x2; + s3 = x3; + s4 = x4; + s5 = x5; + s6 = x6; + s7 = x7; + s8 = x8 * cospi_4_64 + x9 * cospi_28_64; + s9 = x8 * cospi_28_64 - x9 * cospi_4_64; + s10 = x10 * cospi_20_64 + x11 * cospi_12_64; + s11 = x10 * cospi_12_64 - x11 * cospi_20_64; + s12 = -x12 * cospi_28_64 + x13 * cospi_4_64; + s13 = x12 * cospi_4_64 + x13 * cospi_28_64; + s14 = -x14 * cospi_12_64 + x15 * cospi_20_64; + s15 = x14 * cospi_20_64 + x15 * cospi_12_64; + + x0 = WRAPLOW(s0 + s4); + x1 = WRAPLOW(s1 + s5); + x2 = WRAPLOW(s2 + s6); + x3 = WRAPLOW(s3 + s7); + x4 = WRAPLOW(s0 - s4); + x5 = WRAPLOW(s1 - s5); + x6 = WRAPLOW(s2 - s6); + x7 = WRAPLOW(s3 - s7); + x8 = WRAPLOW(dct_const_round_shift(s8 + s12)); + x9 = WRAPLOW(dct_const_round_shift(s9 + s13)); + x10 = WRAPLOW(dct_const_round_shift(s10 + s14)); + x11 = WRAPLOW(dct_const_round_shift(s11 + s15)); + x12 = WRAPLOW(dct_const_round_shift(s8 - s12)); + x13 = WRAPLOW(dct_const_round_shift(s9 - s13)); + x14 = WRAPLOW(dct_const_round_shift(s10 - s14)); + x15 = WRAPLOW(dct_const_round_shift(s11 - s15)); + + // stage 3 + s0 = x0; + s1 = x1; + s2 = x2; + s3 = x3; + s4 = x4 * cospi_8_64 + x5 * cospi_24_64; + s5 = x4 * cospi_24_64 - x5 * cospi_8_64; + s6 = -x6 * cospi_24_64 + x7 * cospi_8_64; + s7 = x6 * cospi_8_64 + x7 * cospi_24_64; + s8 = x8; + s9 = x9; + s10 = x10; + s11 = x11; + s12 = x12 * cospi_8_64 + x13 * cospi_24_64; + s13 = x12 * cospi_24_64 - x13 * cospi_8_64; + s14 = -x14 * cospi_24_64 + x15 * cospi_8_64; + s15 = x14 * cospi_8_64 + x15 * cospi_24_64; + + x0 = WRAPLOW(s0 + s2); + x1 = WRAPLOW(s1 + s3); + x2 = WRAPLOW(s0 - s2); + x3 = WRAPLOW(s1 - s3); + x4 = WRAPLOW(dct_const_round_shift(s4 + s6)); + x5 = WRAPLOW(dct_const_round_shift(s5 + s7)); + x6 = WRAPLOW(dct_const_round_shift(s4 - s6)); + x7 = WRAPLOW(dct_const_round_shift(s5 - s7)); + x8 = WRAPLOW(s8 + s10); + x9 = WRAPLOW(s9 + s11); + x10 = WRAPLOW(s8 - s10); + x11 = WRAPLOW(s9 - s11); + x12 = WRAPLOW(dct_const_round_shift(s12 + s14)); + x13 = WRAPLOW(dct_const_round_shift(s13 + s15)); + x14 = WRAPLOW(dct_const_round_shift(s12 - s14)); + x15 = WRAPLOW(dct_const_round_shift(s13 - s15)); + + // stage 4 + s2 = (-cospi_16_64) * (x2 + x3); + s3 = cospi_16_64 * (x2 - x3); + s6 = cospi_16_64 * (x6 + x7); + s7 = cospi_16_64 * (-x6 + x7); + s10 = cospi_16_64 * (x10 + x11); + s11 = cospi_16_64 * (-x10 + x11); + s14 = (-cospi_16_64) * (x14 + x15); + s15 = cospi_16_64 * (x14 - x15); + + x2 = WRAPLOW(dct_const_round_shift(s2)); + x3 = WRAPLOW(dct_const_round_shift(s3)); + x6 = WRAPLOW(dct_const_round_shift(s6)); + x7 = WRAPLOW(dct_const_round_shift(s7)); + x10 = WRAPLOW(dct_const_round_shift(s10)); + x11 = WRAPLOW(dct_const_round_shift(s11)); + x14 = WRAPLOW(dct_const_round_shift(s14)); + x15 = WRAPLOW(dct_const_round_shift(s15)); + + output[0] = WRAPLOW(x0); + output[1] = WRAPLOW(-x8); + output[2] = WRAPLOW(x12); + output[3] = WRAPLOW(-x4); + output[4] = WRAPLOW(x6); + output[5] = WRAPLOW(x14); + output[6] = WRAPLOW(x10); + output[7] = WRAPLOW(x2); + output[8] = WRAPLOW(x3); + output[9] = WRAPLOW(x11); + output[10] = WRAPLOW(x15); + output[11] = WRAPLOW(x7); + output[12] = WRAPLOW(x5); + output[13] = WRAPLOW(-x13); + output[14] = WRAPLOW(x9); + output[15] = WRAPLOW(-x1); +} + +void aom_idct16x16_38_add_c(const tran_low_t *input, uint8_t *dest, + int stride) { + int i, j; + tran_low_t out[16 * 16] = { 0 }; + tran_low_t *outptr = out; + tran_low_t temp_in[16], temp_out[16]; + + // First transform rows. Since all non-zero dct coefficients are in + // upper-left 8x8 area, we only need to calculate first 8 rows here. + for (i = 0; i < 8; ++i) { + aom_idct16_c(input, outptr); + input += 16; + outptr += 16; + } + + // Then transform columns + for (i = 0; i < 16; ++i) { + for (j = 0; j < 16; ++j) temp_in[j] = out[j * 16 + i]; + aom_idct16_c(temp_in, temp_out); + for (j = 0; j < 16; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 6)); + } + } +} + +void aom_idct16x16_10_add_c(const tran_low_t *input, uint8_t *dest, + int stride) { + tran_low_t out[16 * 16] = { 0 }; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[16], temp_out[16]; + + // First transform rows. Since all non-zero dct coefficients are in + // upper-left 4x4 area, we only need to calculate first 4 rows here. + for (i = 0; i < 4; ++i) { + aom_idct16_c(input, outptr); + input += 16; + outptr += 16; + } + + // Then transform columns + for (i = 0; i < 16; ++i) { + for (j = 0; j < 16; ++j) temp_in[j] = out[j * 16 + i]; + aom_idct16_c(temp_in, temp_out); + for (j = 0; j < 16; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 6)); + } + } +} + +void aom_idct16x16_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) { + int i, j; + tran_high_t a1; + tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64)); + out = WRAPLOW(dct_const_round_shift(out * cospi_16_64)); + a1 = ROUND_POWER_OF_TWO(out, 6); + if (a1 == 0) return; + for (j = 0; j < 16; ++j) { + for (i = 0; i < 16; ++i) dest[i] = clip_pixel_add(dest[i], a1); + dest += stride; + } +} + +void aom_idct32_c(const tran_low_t *input, tran_low_t *output) { + tran_low_t step1[32], step2[32]; + tran_high_t temp1, temp2; + + // stage 1 + step1[0] = input[0]; + step1[1] = input[16]; + step1[2] = input[8]; + step1[3] = input[24]; + step1[4] = input[4]; + step1[5] = input[20]; + step1[6] = input[12]; + step1[7] = input[28]; + step1[8] = input[2]; + step1[9] = input[18]; + step1[10] = input[10]; + step1[11] = input[26]; + step1[12] = input[6]; + step1[13] = input[22]; + step1[14] = input[14]; + step1[15] = input[30]; + + temp1 = input[1] * cospi_31_64 - input[31] * cospi_1_64; + temp2 = input[1] * cospi_1_64 + input[31] * cospi_31_64; + step1[16] = WRAPLOW(dct_const_round_shift(temp1)); + step1[31] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = input[17] * cospi_15_64 - input[15] * cospi_17_64; + temp2 = input[17] * cospi_17_64 + input[15] * cospi_15_64; + step1[17] = WRAPLOW(dct_const_round_shift(temp1)); + step1[30] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = input[9] * cospi_23_64 - input[23] * cospi_9_64; + temp2 = input[9] * cospi_9_64 + input[23] * cospi_23_64; + step1[18] = WRAPLOW(dct_const_round_shift(temp1)); + step1[29] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = input[25] * cospi_7_64 - input[7] * cospi_25_64; + temp2 = input[25] * cospi_25_64 + input[7] * cospi_7_64; + step1[19] = WRAPLOW(dct_const_round_shift(temp1)); + step1[28] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = input[5] * cospi_27_64 - input[27] * cospi_5_64; + temp2 = input[5] * cospi_5_64 + input[27] * cospi_27_64; + step1[20] = WRAPLOW(dct_const_round_shift(temp1)); + step1[27] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = input[21] * cospi_11_64 - input[11] * cospi_21_64; + temp2 = input[21] * cospi_21_64 + input[11] * cospi_11_64; + step1[21] = WRAPLOW(dct_const_round_shift(temp1)); + step1[26] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = input[13] * cospi_19_64 - input[19] * cospi_13_64; + temp2 = input[13] * cospi_13_64 + input[19] * cospi_19_64; + step1[22] = WRAPLOW(dct_const_round_shift(temp1)); + step1[25] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = input[29] * cospi_3_64 - input[3] * cospi_29_64; + temp2 = input[29] * cospi_29_64 + input[3] * cospi_3_64; + step1[23] = WRAPLOW(dct_const_round_shift(temp1)); + step1[24] = WRAPLOW(dct_const_round_shift(temp2)); + + // stage 2 + step2[0] = step1[0]; + step2[1] = step1[1]; + step2[2] = step1[2]; + step2[3] = step1[3]; + step2[4] = step1[4]; + step2[5] = step1[5]; + step2[6] = step1[6]; + step2[7] = step1[7]; + + temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64; + temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64; + step2[8] = WRAPLOW(dct_const_round_shift(temp1)); + step2[15] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64; + temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64; + step2[9] = WRAPLOW(dct_const_round_shift(temp1)); + step2[14] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64; + temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64; + step2[10] = WRAPLOW(dct_const_round_shift(temp1)); + step2[13] = WRAPLOW(dct_const_round_shift(temp2)); + + temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64; + temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64; + step2[11] = WRAPLOW(dct_const_round_shift(temp1)); + step2[12] = WRAPLOW(dct_const_round_shift(temp2)); + + step2[16] = WRAPLOW(step1[16] + step1[17]); + step2[17] = WRAPLOW(step1[16] - step1[17]); + step2[18] = WRAPLOW(-step1[18] + step1[19]); + step2[19] = WRAPLOW(step1[18] + step1[19]); + step2[20] = WRAPLOW(step1[20] + step1[21]); + step2[21] = WRAPLOW(step1[20] - step1[21]); + step2[22] = WRAPLOW(-step1[22] + step1[23]); + step2[23] = WRAPLOW(step1[22] + step1[23]); + step2[24] = WRAPLOW(step1[24] + step1[25]); + step2[25] = WRAPLOW(step1[24] - step1[25]); + step2[26] = WRAPLOW(-step1[26] + step1[27]); + step2[27] = WRAPLOW(step1[26] + step1[27]); + step2[28] = WRAPLOW(step1[28] + step1[29]); + step2[29] = WRAPLOW(step1[28] - step1[29]); + step2[30] = WRAPLOW(-step1[30] + step1[31]); + step2[31] = WRAPLOW(step1[30] + step1[31]); + + // stage 3 + step1[0] = step2[0]; + step1[1] = step2[1]; + step1[2] = step2[2]; + step1[3] = step2[3]; + + temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64; + temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64; + step1[4] = WRAPLOW(dct_const_round_shift(temp1)); + step1[7] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64; + temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64; + step1[5] = WRAPLOW(dct_const_round_shift(temp1)); + step1[6] = WRAPLOW(dct_const_round_shift(temp2)); + + step1[8] = WRAPLOW(step2[8] + step2[9]); + step1[9] = WRAPLOW(step2[8] - step2[9]); + step1[10] = WRAPLOW(-step2[10] + step2[11]); + step1[11] = WRAPLOW(step2[10] + step2[11]); + step1[12] = WRAPLOW(step2[12] + step2[13]); + step1[13] = WRAPLOW(step2[12] - step2[13]); + step1[14] = WRAPLOW(-step2[14] + step2[15]); + step1[15] = WRAPLOW(step2[14] + step2[15]); + + step1[16] = step2[16]; + step1[31] = step2[31]; + temp1 = -step2[17] * cospi_4_64 + step2[30] * cospi_28_64; + temp2 = step2[17] * cospi_28_64 + step2[30] * cospi_4_64; + step1[17] = WRAPLOW(dct_const_round_shift(temp1)); + step1[30] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = -step2[18] * cospi_28_64 - step2[29] * cospi_4_64; + temp2 = -step2[18] * cospi_4_64 + step2[29] * cospi_28_64; + step1[18] = WRAPLOW(dct_const_round_shift(temp1)); + step1[29] = WRAPLOW(dct_const_round_shift(temp2)); + step1[19] = step2[19]; + step1[20] = step2[20]; + temp1 = -step2[21] * cospi_20_64 + step2[26] * cospi_12_64; + temp2 = step2[21] * cospi_12_64 + step2[26] * cospi_20_64; + step1[21] = WRAPLOW(dct_const_round_shift(temp1)); + step1[26] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = -step2[22] * cospi_12_64 - step2[25] * cospi_20_64; + temp2 = -step2[22] * cospi_20_64 + step2[25] * cospi_12_64; + step1[22] = WRAPLOW(dct_const_round_shift(temp1)); + step1[25] = WRAPLOW(dct_const_round_shift(temp2)); + step1[23] = step2[23]; + step1[24] = step2[24]; + step1[27] = step2[27]; + step1[28] = step2[28]; + + // stage 4 + temp1 = (step1[0] + step1[1]) * cospi_16_64; + temp2 = (step1[0] - step1[1]) * cospi_16_64; + step2[0] = WRAPLOW(dct_const_round_shift(temp1)); + step2[1] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64; + temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64; + step2[2] = WRAPLOW(dct_const_round_shift(temp1)); + step2[3] = WRAPLOW(dct_const_round_shift(temp2)); + step2[4] = WRAPLOW(step1[4] + step1[5]); + step2[5] = WRAPLOW(step1[4] - step1[5]); + step2[6] = WRAPLOW(-step1[6] + step1[7]); + step2[7] = WRAPLOW(step1[6] + step1[7]); + + step2[8] = step1[8]; + step2[15] = step1[15]; + temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64; + temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64; + step2[9] = WRAPLOW(dct_const_round_shift(temp1)); + step2[14] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64; + temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64; + step2[10] = WRAPLOW(dct_const_round_shift(temp1)); + step2[13] = WRAPLOW(dct_const_round_shift(temp2)); + step2[11] = step1[11]; + step2[12] = step1[12]; + + step2[16] = WRAPLOW(step1[16] + step1[19]); + step2[17] = WRAPLOW(step1[17] + step1[18]); + step2[18] = WRAPLOW(step1[17] - step1[18]); + step2[19] = WRAPLOW(step1[16] - step1[19]); + step2[20] = WRAPLOW(-step1[20] + step1[23]); + step2[21] = WRAPLOW(-step1[21] + step1[22]); + step2[22] = WRAPLOW(step1[21] + step1[22]); + step2[23] = WRAPLOW(step1[20] + step1[23]); + + step2[24] = WRAPLOW(step1[24] + step1[27]); + step2[25] = WRAPLOW(step1[25] + step1[26]); + step2[26] = WRAPLOW(step1[25] - step1[26]); + step2[27] = WRAPLOW(step1[24] - step1[27]); + step2[28] = WRAPLOW(-step1[28] + step1[31]); + step2[29] = WRAPLOW(-step1[29] + step1[30]); + step2[30] = WRAPLOW(step1[29] + step1[30]); + step2[31] = WRAPLOW(step1[28] + step1[31]); + + // stage 5 + step1[0] = WRAPLOW(step2[0] + step2[3]); + step1[1] = WRAPLOW(step2[1] + step2[2]); + step1[2] = WRAPLOW(step2[1] - step2[2]); + step1[3] = WRAPLOW(step2[0] - step2[3]); + step1[4] = step2[4]; + temp1 = (step2[6] - step2[5]) * cospi_16_64; + temp2 = (step2[5] + step2[6]) * cospi_16_64; + step1[5] = WRAPLOW(dct_const_round_shift(temp1)); + step1[6] = WRAPLOW(dct_const_round_shift(temp2)); + step1[7] = step2[7]; + + step1[8] = WRAPLOW(step2[8] + step2[11]); + step1[9] = WRAPLOW(step2[9] + step2[10]); + step1[10] = WRAPLOW(step2[9] - step2[10]); + step1[11] = WRAPLOW(step2[8] - step2[11]); + step1[12] = WRAPLOW(-step2[12] + step2[15]); + step1[13] = WRAPLOW(-step2[13] + step2[14]); + step1[14] = WRAPLOW(step2[13] + step2[14]); + step1[15] = WRAPLOW(step2[12] + step2[15]); + + step1[16] = step2[16]; + step1[17] = step2[17]; + temp1 = -step2[18] * cospi_8_64 + step2[29] * cospi_24_64; + temp2 = step2[18] * cospi_24_64 + step2[29] * cospi_8_64; + step1[18] = WRAPLOW(dct_const_round_shift(temp1)); + step1[29] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = -step2[19] * cospi_8_64 + step2[28] * cospi_24_64; + temp2 = step2[19] * cospi_24_64 + step2[28] * cospi_8_64; + step1[19] = WRAPLOW(dct_const_round_shift(temp1)); + step1[28] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = -step2[20] * cospi_24_64 - step2[27] * cospi_8_64; + temp2 = -step2[20] * cospi_8_64 + step2[27] * cospi_24_64; + step1[20] = WRAPLOW(dct_const_round_shift(temp1)); + step1[27] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = -step2[21] * cospi_24_64 - step2[26] * cospi_8_64; + temp2 = -step2[21] * cospi_8_64 + step2[26] * cospi_24_64; + step1[21] = WRAPLOW(dct_const_round_shift(temp1)); + step1[26] = WRAPLOW(dct_const_round_shift(temp2)); + step1[22] = step2[22]; + step1[23] = step2[23]; + step1[24] = step2[24]; + step1[25] = step2[25]; + step1[30] = step2[30]; + step1[31] = step2[31]; + + // stage 6 + step2[0] = WRAPLOW(step1[0] + step1[7]); + step2[1] = WRAPLOW(step1[1] + step1[6]); + step2[2] = WRAPLOW(step1[2] + step1[5]); + step2[3] = WRAPLOW(step1[3] + step1[4]); + step2[4] = WRAPLOW(step1[3] - step1[4]); + step2[5] = WRAPLOW(step1[2] - step1[5]); + step2[6] = WRAPLOW(step1[1] - step1[6]); + step2[7] = WRAPLOW(step1[0] - step1[7]); + step2[8] = step1[8]; + step2[9] = step1[9]; + temp1 = (-step1[10] + step1[13]) * cospi_16_64; + temp2 = (step1[10] + step1[13]) * cospi_16_64; + step2[10] = WRAPLOW(dct_const_round_shift(temp1)); + step2[13] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = (-step1[11] + step1[12]) * cospi_16_64; + temp2 = (step1[11] + step1[12]) * cospi_16_64; + step2[11] = WRAPLOW(dct_const_round_shift(temp1)); + step2[12] = WRAPLOW(dct_const_round_shift(temp2)); + step2[14] = step1[14]; + step2[15] = step1[15]; + + step2[16] = WRAPLOW(step1[16] + step1[23]); + step2[17] = WRAPLOW(step1[17] + step1[22]); + step2[18] = WRAPLOW(step1[18] + step1[21]); + step2[19] = WRAPLOW(step1[19] + step1[20]); + step2[20] = WRAPLOW(step1[19] - step1[20]); + step2[21] = WRAPLOW(step1[18] - step1[21]); + step2[22] = WRAPLOW(step1[17] - step1[22]); + step2[23] = WRAPLOW(step1[16] - step1[23]); + + step2[24] = WRAPLOW(-step1[24] + step1[31]); + step2[25] = WRAPLOW(-step1[25] + step1[30]); + step2[26] = WRAPLOW(-step1[26] + step1[29]); + step2[27] = WRAPLOW(-step1[27] + step1[28]); + step2[28] = WRAPLOW(step1[27] + step1[28]); + step2[29] = WRAPLOW(step1[26] + step1[29]); + step2[30] = WRAPLOW(step1[25] + step1[30]); + step2[31] = WRAPLOW(step1[24] + step1[31]); + + // stage 7 + step1[0] = WRAPLOW(step2[0] + step2[15]); + step1[1] = WRAPLOW(step2[1] + step2[14]); + step1[2] = WRAPLOW(step2[2] + step2[13]); + step1[3] = WRAPLOW(step2[3] + step2[12]); + step1[4] = WRAPLOW(step2[4] + step2[11]); + step1[5] = WRAPLOW(step2[5] + step2[10]); + step1[6] = WRAPLOW(step2[6] + step2[9]); + step1[7] = WRAPLOW(step2[7] + step2[8]); + step1[8] = WRAPLOW(step2[7] - step2[8]); + step1[9] = WRAPLOW(step2[6] - step2[9]); + step1[10] = WRAPLOW(step2[5] - step2[10]); + step1[11] = WRAPLOW(step2[4] - step2[11]); + step1[12] = WRAPLOW(step2[3] - step2[12]); + step1[13] = WRAPLOW(step2[2] - step2[13]); + step1[14] = WRAPLOW(step2[1] - step2[14]); + step1[15] = WRAPLOW(step2[0] - step2[15]); + + step1[16] = step2[16]; + step1[17] = step2[17]; + step1[18] = step2[18]; + step1[19] = step2[19]; + temp1 = (-step2[20] + step2[27]) * cospi_16_64; + temp2 = (step2[20] + step2[27]) * cospi_16_64; + step1[20] = WRAPLOW(dct_const_round_shift(temp1)); + step1[27] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = (-step2[21] + step2[26]) * cospi_16_64; + temp2 = (step2[21] + step2[26]) * cospi_16_64; + step1[21] = WRAPLOW(dct_const_round_shift(temp1)); + step1[26] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = (-step2[22] + step2[25]) * cospi_16_64; + temp2 = (step2[22] + step2[25]) * cospi_16_64; + step1[22] = WRAPLOW(dct_const_round_shift(temp1)); + step1[25] = WRAPLOW(dct_const_round_shift(temp2)); + temp1 = (-step2[23] + step2[24]) * cospi_16_64; + temp2 = (step2[23] + step2[24]) * cospi_16_64; + step1[23] = WRAPLOW(dct_const_round_shift(temp1)); + step1[24] = WRAPLOW(dct_const_round_shift(temp2)); + step1[28] = step2[28]; + step1[29] = step2[29]; + step1[30] = step2[30]; + step1[31] = step2[31]; + + // final stage + output[0] = WRAPLOW(step1[0] + step1[31]); + output[1] = WRAPLOW(step1[1] + step1[30]); + output[2] = WRAPLOW(step1[2] + step1[29]); + output[3] = WRAPLOW(step1[3] + step1[28]); + output[4] = WRAPLOW(step1[4] + step1[27]); + output[5] = WRAPLOW(step1[5] + step1[26]); + output[6] = WRAPLOW(step1[6] + step1[25]); + output[7] = WRAPLOW(step1[7] + step1[24]); + output[8] = WRAPLOW(step1[8] + step1[23]); + output[9] = WRAPLOW(step1[9] + step1[22]); + output[10] = WRAPLOW(step1[10] + step1[21]); + output[11] = WRAPLOW(step1[11] + step1[20]); + output[12] = WRAPLOW(step1[12] + step1[19]); + output[13] = WRAPLOW(step1[13] + step1[18]); + output[14] = WRAPLOW(step1[14] + step1[17]); + output[15] = WRAPLOW(step1[15] + step1[16]); + output[16] = WRAPLOW(step1[15] - step1[16]); + output[17] = WRAPLOW(step1[14] - step1[17]); + output[18] = WRAPLOW(step1[13] - step1[18]); + output[19] = WRAPLOW(step1[12] - step1[19]); + output[20] = WRAPLOW(step1[11] - step1[20]); + output[21] = WRAPLOW(step1[10] - step1[21]); + output[22] = WRAPLOW(step1[9] - step1[22]); + output[23] = WRAPLOW(step1[8] - step1[23]); + output[24] = WRAPLOW(step1[7] - step1[24]); + output[25] = WRAPLOW(step1[6] - step1[25]); + output[26] = WRAPLOW(step1[5] - step1[26]); + output[27] = WRAPLOW(step1[4] - step1[27]); + output[28] = WRAPLOW(step1[3] - step1[28]); + output[29] = WRAPLOW(step1[2] - step1[29]); + output[30] = WRAPLOW(step1[1] - step1[30]); + output[31] = WRAPLOW(step1[0] - step1[31]); +} + +void aom_idct32x32_1024_add_c(const tran_low_t *input, uint8_t *dest, + int stride) { + tran_low_t out[32 * 32]; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[32], temp_out[32]; + + // Rows + for (i = 0; i < 32; ++i) { + int16_t zero_coeff[16]; + for (j = 0; j < 16; ++j) zero_coeff[j] = input[2 * j] | input[2 * j + 1]; + for (j = 0; j < 8; ++j) + zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1]; + for (j = 0; j < 4; ++j) + zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1]; + for (j = 0; j < 2; ++j) + zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1]; + + if (zero_coeff[0] | zero_coeff[1]) + aom_idct32_c(input, outptr); + else + memset(outptr, 0, sizeof(tran_low_t) * 32); + input += 32; + outptr += 32; + } + + // Columns + for (i = 0; i < 32; ++i) { + for (j = 0; j < 32; ++j) temp_in[j] = out[j * 32 + i]; + aom_idct32_c(temp_in, temp_out); + for (j = 0; j < 32; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 6)); + } + } +} + +void aom_idct32x32_135_add_c(const tran_low_t *input, uint8_t *dest, + int stride) { + tran_low_t out[32 * 32] = { 0 }; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[32], temp_out[32]; + + // Rows + // only upper-left 16x16 has non-zero coeff + for (i = 0; i < 16; ++i) { + aom_idct32_c(input, outptr); + input += 32; + outptr += 32; + } + + // Columns + for (i = 0; i < 32; ++i) { + for (j = 0; j < 32; ++j) temp_in[j] = out[j * 32 + i]; + aom_idct32_c(temp_in, temp_out); + for (j = 0; j < 32; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 6)); + } + } +} + +void aom_idct32x32_34_add_c(const tran_low_t *input, uint8_t *dest, + int stride) { + tran_low_t out[32 * 32] = { 0 }; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[32], temp_out[32]; + + // Rows + // only upper-left 8x8 has non-zero coeff + for (i = 0; i < 8; ++i) { + aom_idct32_c(input, outptr); + input += 32; + outptr += 32; + } + + // Columns + for (i = 0; i < 32; ++i) { + for (j = 0; j < 32; ++j) temp_in[j] = out[j * 32 + i]; + aom_idct32_c(temp_in, temp_out); + for (j = 0; j < 32; ++j) { + dest[j * stride + i] = clip_pixel_add(dest[j * stride + i], + ROUND_POWER_OF_TWO(temp_out[j], 6)); + } + } +} + +void aom_idct32x32_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) { + int i, j; + tran_high_t a1; + + tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64)); + out = WRAPLOW(dct_const_round_shift(out * cospi_16_64)); + a1 = ROUND_POWER_OF_TWO(out, 6); + if (a1 == 0) return; + + for (j = 0; j < 32; ++j) { + for (i = 0; i < 32; ++i) dest[i] = clip_pixel_add(dest[i], a1); + dest += stride; + } +} + +#if CONFIG_HIGHBITDEPTH +void aom_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_high_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] = HIGHBD_WRAPLOW(a1, bd); + op[1] = HIGHBD_WRAPLOW(b1, bd); + op[2] = HIGHBD_WRAPLOW(c1, bd); + op[3] = HIGHBD_WRAPLOW(d1, bd); + 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; + dest[stride * 0] = + highbd_clip_pixel_add(dest[stride * 0], HIGHBD_WRAPLOW(a1, bd), bd); + dest[stride * 1] = + highbd_clip_pixel_add(dest[stride * 1], HIGHBD_WRAPLOW(b1, bd), bd); + dest[stride * 2] = + highbd_clip_pixel_add(dest[stride * 2], HIGHBD_WRAPLOW(c1, bd), bd); + dest[stride * 3] = + highbd_clip_pixel_add(dest[stride * 3], HIGHBD_WRAPLOW(d1, bd), bd); + + ip++; + dest++; + } +} + +void aom_highbd_iwht4x4_1_add_c(const tran_low_t *in, uint8_t *dest8, + int dest_stride, int bd) { + int i; + tran_high_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] = HIGHBD_WRAPLOW(a1, bd); + op[1] = op[2] = op[3] = HIGHBD_WRAPLOW(e1, bd); + + 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++; + } +} + +void aom_highbd_idct4_c(const tran_low_t *input, tran_low_t *output, int bd) { + tran_low_t step[4]; + tran_high_t temp1, temp2; + (void)bd; + // stage 1 + temp1 = (input[0] + input[2]) * cospi_16_64; + temp2 = (input[0] - input[2]) * cospi_16_64; + step[0] = HIGHBD_WRAPLOW(dct_const_round_shift(temp1), bd); + step[1] = HIGHBD_WRAPLOW(dct_const_round_shift(temp2), bd); + temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64; + temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64; + step[2] = HIGHBD_WRAPLOW(dct_const_round_shift(temp1), bd); + step[3] = HIGHBD_WRAPLOW(dct_const_round_shift(temp2), bd); + + // stage 2 + output[0] = HIGHBD_WRAPLOW(step[0] + step[3], bd); + output[1] = HIGHBD_WRAPLOW(step[1] + step[2], bd); + output[2] = HIGHBD_WRAPLOW(step[1] - step[2], bd); + output[3] = HIGHBD_WRAPLOW(step[0] - step[3], bd); +} + +void aom_highbd_idct4x4_16_add_c(const tran_low_t *input, uint8_t *dest8, + int stride, int bd) { + tran_low_t out[4 * 4]; + tran_low_t *outptr = out; + int i, j; + tran_low_t temp_in[4], temp_out[4]; + uint16_t *dest = CONVERT_TO_SHORTPTR(dest8); + + // Rows + for (i = 0; i < 4; ++i) { + aom_highbd_idct4_c(input, outptr, bd); + input += 4; + outptr += 4; + } + + // Columns + for (i = 0; i < 4; ++i) { + for (j = 0; j < 4; ++j) temp_in[j] = out[j * 4 + i]; + aom_highbd_idct4_c(temp_in, temp_out, bd); + for (j = 0; j < 4; ++j) { + dest[j * stride + i] = highbd_clip_pixel_add( + dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 4), bd); + } + } +} + +void aom_highbd_idct4x4_1_add_c(const tran_low_t *input, uint8_t *dest8, + int dest_stride, int bd) { + int i; + tran_high_t a1; + tran_low_t out = + HIGHBD_WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), bd); + uint16_t *dest = CONVERT_TO_SHORTPTR(dest8); + + out = HIGHBD_WRAPLOW(dct_const_round_shift(out * cospi_16_64), bd); + a1 = ROUND_POWER_OF_TWO(out, 4); + + for (i = 0; i < 4; i++) { + dest[0] = highbd_clip_pixel_add(dest[0], a1, bd); + dest[1] = highbd_clip_pixel_add(dest[1], a1, bd); + dest[2] = highbd_clip_pixel_add(dest[2], a1, bd); + dest[3] = highbd_clip_pixel_add(dest[3], a1, bd); + dest += dest_stride; + } +} + +#endif // CONFIG_HIGHBITDEPTH |