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 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_ 71