8f75ea6b5c
Most of the code that actually uses these matrices indexes them as if they were a single contiguous array, and coverity produces reports about the resulting accesses that overflow the static bounds of the first row. This is perfectly legal in C, but converting them to actual [16] arrays should eliminate the report, and removes a good deal of extraneous indexing and address operators from the code. Change-Id: Ibda479e2232b3e51f9edf3b355b8640520fdbf23
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "vpx_ports/config.h"
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#include "dequantize.h"
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#include "predictdc.h"
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#include "idct.h"
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#include "vpx_mem/vpx_mem.h"
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extern void vp8_short_idct4x4llm_c(short *input, short *output, int pitch) ;
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extern void vp8_short_idct4x4llm_1_c(short *input, short *output, int pitch);
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void vp8_dequantize_b_c(BLOCKD *d)
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{
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int i;
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short *DQ = d->dqcoeff;
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short *Q = d->qcoeff;
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short *DQC = d->dequant;
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for (i = 0; i < 16; i++)
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{
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DQ[i] = Q[i] * DQC[i];
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}
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}
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void vp8_dequant_idct_add_c(short *input, short *dq, unsigned char *pred,
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unsigned char *dest, int pitch, int stride)
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{
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short output[16];
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short *diff_ptr = output;
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int r, c;
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int i;
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for (i = 0; i < 16; i++)
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{
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input[i] = dq[i] * input[i];
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}
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// the idct halves ( >> 1) the pitch
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vp8_short_idct4x4llm_c(input, output, 4 << 1);
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vpx_memset(input, 0, 32);
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for (r = 0; r < 4; r++)
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{
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for (c = 0; c < 4; c++)
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{
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int a = diff_ptr[c] + pred[c];
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if (a < 0)
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a = 0;
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if (a > 255)
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a = 255;
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dest[c] = (unsigned char) a;
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}
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dest += stride;
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diff_ptr += 4;
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pred += pitch;
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}
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}
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void vp8_dequant_dc_idct_add_c(short *input, short *dq, unsigned char *pred,
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unsigned char *dest, int pitch, int stride,
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int Dc)
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{
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int i;
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short output[16];
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short *diff_ptr = output;
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int r, c;
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input[0] = (short)Dc;
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for (i = 1; i < 16; i++)
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{
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input[i] = dq[i] * input[i];
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}
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// the idct halves ( >> 1) the pitch
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vp8_short_idct4x4llm_c(input, output, 4 << 1);
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vpx_memset(input, 0, 32);
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for (r = 0; r < 4; r++)
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{
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for (c = 0; c < 4; c++)
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{
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int a = diff_ptr[c] + pred[c];
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if (a < 0)
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a = 0;
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if (a > 255)
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a = 255;
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dest[c] = (unsigned char) a;
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}
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dest += stride;
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diff_ptr += 4;
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pred += pitch;
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}
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}
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