示例#1
0
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;
    }
  }
}
示例#2
0
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];
    }
  }
}
示例#3
0
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;
    }
  }
}
示例#4
0
文件: idct.c 项目: jmvalin/aom
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));
    }
  }
}
示例#5
0
文件: idct.c 项目: jmvalin/aom
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));
    }
  }
}
示例#6
0
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]);  }
}
示例#7
0
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]);  }
}