shithub: libvpx

ref: a0765aa9f34e7f5dfa1ba938dbe9e1399a75bf5e
dir: /vp8/common/mips/mmi/idct_blk_mmi.c/

/*
 *  Copyright (c) 2017 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "./vp8_rtcd.h"
#include "vpx_mem/vpx_mem.h"

void vp8_dequant_idct_add_y_block_mmi(int16_t *q, int16_t *dq, uint8_t *dst,
                                      int stride, char *eobs) {
  int i, j;

  for (i = 0; i < 4; i++) {
    for (j = 0; j < 4; j++) {
      if (*eobs++ > 1) {
        vp8_dequant_idct_add_mmi(q, dq, dst, stride);
      } else {
        vp8_dc_only_idct_add_mmi(q[0] * dq[0], dst, stride, dst, stride);
        memset(q, 0, 2 * sizeof(q[0]));
      }

      q += 16;
      dst += 4;
    }

    dst += 4 * stride - 16;
  }
}

void vp8_dequant_idct_add_uv_block_mmi(int16_t *q, int16_t *dq, uint8_t *dst_u,
                                       uint8_t *dst_v, int stride, char *eobs) {
  int i, j;

  for (i = 0; i < 2; i++) {
    for (j = 0; j < 2; j++) {
      if (*eobs++ > 1) {
        vp8_dequant_idct_add_mmi(q, dq, dst_u, stride);
      } else {
        vp8_dc_only_idct_add_mmi(q[0] * dq[0], dst_u, stride, dst_u, stride);
        memset(q, 0, 2 * sizeof(q[0]));
      }

      q += 16;
      dst_u += 4;
    }

    dst_u += 4 * stride - 8;
  }

  for (i = 0; i < 2; i++) {
    for (j = 0; j < 2; j++) {
      if (*eobs++ > 1) {
        vp8_dequant_idct_add_mmi(q, dq, dst_v, stride);
      } else {
        vp8_dc_only_idct_add_mmi(q[0] * dq[0], dst_v, stride, dst_v, stride);
        memset(q, 0, 2 * sizeof(q[0]));
      }

      q += 16;
      dst_v += 4;
    }

    dst_v += 4 * stride - 8;
  }
}