void vp9_fht8x8_c(const int16_t *input, tran_low_t *output, int stride, int tx_type) { if (tx_type == DCT_DCT) { vpx_fdct8x8_c(input, output, stride); } else { tran_low_t out[64]; int i, j; tran_low_t temp_in[8], temp_out[8]; const transform_2d ht = FHT_8[tx_type]; // Columns for (i = 0; i < 8; ++i) { for (j = 0; j < 8; ++j) temp_in[j] = input[j * stride + i] * 4; ht.cols(temp_in, temp_out); for (j = 0; j < 8; ++j) out[j * 8 + i] = temp_out[j]; } // Rows for (i = 0; i < 8; ++i) { for (j = 0; j < 8; ++j) temp_in[j] = out[j + i * 8]; ht.rows(temp_in, temp_out); for (j = 0; j < 8; ++j) output[j + i * 8] = (temp_out[j] + (temp_out[j] < 0)) >> 1; } } }
void vp9_fht16x16_c(const int16_t *input, tran_low_t *output, int stride, int tx_type) { if (tx_type == DCT_DCT) { vpx_fdct16x16_c(input, output, stride); } else { tran_low_t out[256]; int i, j; tran_low_t temp_in[16], temp_out[16]; const transform_2d ht = FHT_16[tx_type]; // Columns for (i = 0; i < 16; ++i) { for (j = 0; j < 16; ++j) temp_in[j] = input[j * stride + i] * 4; ht.cols(temp_in, temp_out); for (j = 0; j < 16; ++j) out[j * 16 + i] = (temp_out[j] + 1 + (temp_out[j] < 0)) >> 2; } // Rows for (i = 0; i < 16; ++i) { for (j = 0; j < 16; ++j) temp_in[j] = out[j + i * 16]; ht.rows(temp_in, temp_out); for (j = 0; j < 16; ++j) output[j + i * 16] = temp_out[j]; } } }
void vp9_fht4x4_c(const int16_t *input, tran_low_t *output, int stride, int tx_type) { if (tx_type == DCT_DCT) { vpx_fdct4x4_c(input, output, stride); } else { tran_low_t out[4 * 4]; int i, j; tran_low_t temp_in[4], temp_out[4]; const transform_2d ht = FHT_4[tx_type]; // Columns for (i = 0; i < 4; ++i) { for (j = 0; j < 4; ++j) temp_in[j] = input[j * stride + i] * 16; if (i == 0 && temp_in[0]) temp_in[0] += 1; ht.cols(temp_in, temp_out); for (j = 0; j < 4; ++j) out[j * 4 + i] = temp_out[j]; } // Rows for (i = 0; i < 4; ++i) { for (j = 0; j < 4; ++j) temp_in[j] = out[j + i * 4]; ht.rows(temp_in, temp_out); for (j = 0; j < 4; ++j) output[j + i * 4] = (temp_out[j] + 1) >> 2; } } }
void vp10_iht16x16_256_add_c(const tran_low_t *input, uint8_t *dest, int stride, int tx_type) { int i, j; tran_low_t out[16 * 16]; tran_low_t *outptr = out; tran_low_t temp_in[16], temp_out[16]; const transform_2d ht = IHT_16[tx_type]; // Rows for (i = 0; i < 16; ++i) { ht.rows(input, outptr); input += 16; outptr += 16; } // Columns for (i = 0; i < 16; ++i) { for (j = 0; j < 16; ++j) temp_in[j] = out[j * 16 + i]; ht.cols(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 vp10_iht8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int stride, int tx_type) { int i, j; tran_low_t out[8 * 8]; tran_low_t *outptr = out; tran_low_t temp_in[8], temp_out[8]; const transform_2d ht = IHT_8[tx_type]; // inverse transform row vectors for (i = 0; i < 8; ++i) { ht.rows(input, outptr); input += 8; outptr += 8; } // inverse transform column vectors for (i = 0; i < 8; ++i) { for (j = 0; j < 8; ++j) temp_in[j] = out[j * 8 + i]; ht.cols(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 vp9_short_iht16x16_add_c(int16_t *input, uint8_t *dest, int dest_stride, int tx_type) { int i, j; int16_t out[16 * 16]; int16_t *outptr = out; int16_t temp_in[16], temp_out[16]; const transform_2d ht = IHT_16[tx_type]; // Rows for (i = 0; i < 16; ++i) { ht.rows(input, outptr); input += 16; outptr += 16; } // Columns for (i = 0; i < 16; ++i) { for (j = 0; j < 16; ++j) temp_in[j] = out[j * 16 + i]; ht.cols(temp_in, temp_out); for (j = 0; j < 16; ++j) dest[j * dest_stride + i] = clip_pixel(ROUND_POWER_OF_TWO(temp_out[j], 6) + dest[j * dest_stride + i]); } }
void vp9_short_iht8x8_add_c(int16_t *input, uint8_t *dest, int dest_stride, int tx_type) { int i, j; int16_t out[8 * 8]; int16_t *outptr = out; int16_t temp_in[8], temp_out[8]; const transform_2d ht = IHT_8[tx_type]; // inverse transform row vectors for (i = 0; i < 8; ++i) { ht.rows(input, outptr); input += 8; outptr += 8; } // inverse transform column vectors for (i = 0; i < 8; ++i) { for (j = 0; j < 8; ++j) temp_in[j] = out[j * 8 + i]; ht.cols(temp_in, temp_out); for (j = 0; j < 8; ++j) dest[j * dest_stride + i] = clip_pixel(ROUND_POWER_OF_TWO(temp_out[j], 5) + dest[j * dest_stride + i]); } }