vp8/common/invtrans.h

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 #ifndef VP8_COMMON_INVTRANS_H_
  13 #define VP8_COMMON_INVTRANS_H_
  14
  15 #include "./vpx_config.h"
  16 #include "vp8_rtcd.h"
  17 #include "blockd.h"
  18 #include "onyxc_int.h"
  19
  20 #if CONFIG_MULTITHREAD
  21 #include "vpx_mem/vpx_mem.h"
  22 #endif
  23
  24 #ifdef __cplusplus
  25 extern "C" {
  26 #endif
  27
  28 static void eob_adjust(char *eobs, short *diff)
  29 {
  30     /* eob adjust.... the idct can only skip if both the dc and eob are zero */
  31     int js;
  32     for(js = 0; js < 16; js++)
  33     {
  34         if((eobs[js] == 0) && (diff[0] != 0))
  35             eobs[js]++;
  36         diff+=16;
  37     }
  38 }
  39
  40 static INLINE void vp8_inverse_transform_mby(MACROBLOCKD *xd)
  41 {
  42     short *DQC = xd->dequant_y1;
  43
  44     if (xd->mode_info_context->mbmi.mode != SPLITMV)
  45     {
  46         /* do 2nd order transform on the dc block */
  47         if (xd->eobs[24] > 1)
  48         {
  49             vp8_short_inv_walsh4x4
  50                 (&xd->block[24].dqcoeff[0], xd->qcoeff);
  51         }
  52         else
  53         {
  54             vp8_short_inv_walsh4x4_1
  55                 (&xd->block[24].dqcoeff[0], xd->qcoeff);
  56         }
  57         eob_adjust(xd->eobs, xd->qcoeff);
  58
  59         DQC = xd->dequant_y1_dc;
  60     }
  61     vp8_dequant_idct_add_y_block
  62                     (xd->qcoeff, DQC,
  63                      xd->dst.y_buffer,
  64                      xd->dst.y_stride, xd->eobs);
  65 }
  66 #ifdef __cplusplus
  67 }  // extern "C"
  68 #endif
  69
  70 #endif  // VP8_COMMON_INVTRANS_H_