shithub: libvpx

ref: d6c5ef4557dea159db81a90082aee48581f3b184
dir: /vp8/common/arm/armv6/idct_blk_v6.c/

/*
 *  Copyright (c) 2010 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 "vpx_config.h"
#include "vp8_rtcd.h"

void vp8_dequant_idct_add_y_block_v6(short *q, short *dq, unsigned char *dst,
                                     int stride, char *eobs) {
  int i;

  for (i = 0; i < 4; ++i) {
    if (eobs[0] > 1)
      vp8_dequant_idct_add_v6(q, dq, dst, stride);
    else if (eobs[0] == 1) {
      vp8_dc_only_idct_add_v6(q[0] * dq[0], dst, stride, dst, stride);
      ((int *)q)[0] = 0;
    }

    if (eobs[1] > 1)
      vp8_dequant_idct_add_v6(q + 16, dq, dst + 4, stride);
    else if (eobs[1] == 1) {
      vp8_dc_only_idct_add_v6(q[16] * dq[0], dst + 4, stride, dst + 4, stride);
      ((int *)(q + 16))[0] = 0;
    }

    if (eobs[2] > 1)
      vp8_dequant_idct_add_v6(q + 32, dq, dst + 8, stride);
    else if (eobs[2] == 1) {
      vp8_dc_only_idct_add_v6(q[32] * dq[0], dst + 8, stride, dst + 8, stride);
      ((int *)(q + 32))[0] = 0;
    }

    if (eobs[3] > 1)
      vp8_dequant_idct_add_v6(q + 48, dq, dst + 12, stride);
    else if (eobs[3] == 1) {
      vp8_dc_only_idct_add_v6(q[48] * dq[0], dst + 12, stride, dst + 12,
                              stride);
      ((int *)(q + 48))[0] = 0;
    }

    q += 64;
    dst += 4 * stride;
    eobs += 4;
  }
}

void vp8_dequant_idct_add_uv_block_v6(short *q, short *dq, unsigned char *dstu,
                                      unsigned char *dstv, int stride,
                                      char *eobs) {
  int i;

  for (i = 0; i < 2; ++i) {
    if (eobs[0] > 1)
      vp8_dequant_idct_add_v6(q, dq, dstu, stride);
    else if (eobs[0] == 1) {
      vp8_dc_only_idct_add_v6(q[0] * dq[0], dstu, stride, dstu, stride);
      ((int *)q)[0] = 0;
    }

    if (eobs[1] > 1)
      vp8_dequant_idct_add_v6(q + 16, dq, dstu + 4, stride);
    else if (eobs[1] == 1) {
      vp8_dc_only_idct_add_v6(q[16] * dq[0], dstu + 4, stride, dstu + 4,
                              stride);
      ((int *)(q + 16))[0] = 0;
    }

    q += 32;
    dstu += 4 * stride;
    eobs += 2;
  }

  for (i = 0; i < 2; ++i) {
    if (eobs[0] > 1)
      vp8_dequant_idct_add_v6(q, dq, dstv, stride);
    else if (eobs[0] == 1) {
      vp8_dc_only_idct_add_v6(q[0] * dq[0], dstv, stride, dstv, stride);
      ((int *)q)[0] = 0;
    }

    if (eobs[1] > 1)
      vp8_dequant_idct_add_v6(q + 16, dq, dstv + 4, stride);
    else if (eobs[1] == 1) {
      vp8_dc_only_idct_add_v6(q[16] * dq[0], dstv + 4, stride, dstv + 4,
                              stride);
      ((int *)(q + 16))[0] = 0;
    }

    q += 32;
    dstv += 4 * stride;
    eobs += 2;
  }
}