FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/h264idct_template.c	Lines:	191	191	100.0 %
Date:	2021-01-21 21:11:50	Branches:	70	70	100.0 %


/*
 * H.264 IDCT
 * Copyright (c) 2004-2011 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * H.264 IDCT.
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

#include "bit_depth_template.c"
#include "libavutil/common.h"
#include "h264dec.h"
#include "h264idct.h"

void FUNCC(ff_h264_idct_add)(uint8_t *_dst, int16_t *_block, int stride)
{
    int i;
    pixel *dst = (pixel*)_dst;
    dctcoef *block = (dctcoef*)_block;
    stride >>= sizeof(pixel)-1;

    block[0] += 1 << 5;

    for(i=0; i<4; i++){
        const SUINT z0=  block[i + 4*0]     +  (unsigned)block[i + 4*2];
        const SUINT z1=  block[i + 4*0]     -  (unsigned)block[i + 4*2];
        const SUINT z2= (block[i + 4*1]>>1) -  (unsigned)block[i + 4*3];
        const SUINT z3=  block[i + 4*1]     + (unsigned)(block[i + 4*3]>>1);

        block[i + 4*0]= z0 + z3;
        block[i + 4*1]= z1 + z2;
        block[i + 4*2]= z1 - z2;
        block[i + 4*3]= z0 - z3;
    }

    for(i=0; i<4; i++){
        const SUINT z0=  block[0 + 4*i]     +  (SUINT)block[2 + 4*i];
        const SUINT z1=  block[0 + 4*i]     -  (SUINT)block[2 + 4*i];
        const SUINT z2= (block[1 + 4*i]>>1) -  (SUINT)block[3 + 4*i];
        const SUINT z3=  block[1 + 4*i]     + (SUINT)(block[3 + 4*i]>>1);

        dst[i + 0*stride]= av_clip_pixel(dst[i + 0*stride] + ((int)(z0 + z3) >> 6));
        dst[i + 1*stride]= av_clip_pixel(dst[i + 1*stride] + ((int)(z1 + z2) >> 6));
        dst[i + 2*stride]= av_clip_pixel(dst[i + 2*stride] + ((int)(z1 - z2) >> 6));
        dst[i + 3*stride]= av_clip_pixel(dst[i + 3*stride] + ((int)(z0 - z3) >> 6));
    }

    memset(block, 0, 16 * sizeof(dctcoef));
}

void FUNCC(ff_h264_idct8_add)(uint8_t *_dst, int16_t *_block, int stride){
    int i;
    pixel *dst = (pixel*)_dst;
    dctcoef *block = (dctcoef*)_block;
    stride >>= sizeof(pixel)-1;

    block[0] += 32;

    for( i = 0; i < 8; i++ )
    {
        const unsigned int a0 =  block[i+0*8] + (unsigned)block[i+4*8];
        const unsigned int a2 =  block[i+0*8] - (unsigned)block[i+4*8];
        const unsigned int a4 = (block[i+2*8]>>1) - (unsigned)block[i+6*8];
        const unsigned int a6 = (block[i+6*8]>>1) + (unsigned)block[i+2*8];

        const unsigned int b0 = a0 + a6;
        const unsigned int b2 = a2 + a4;
        const unsigned int b4 = a2 - a4;
        const unsigned int b6 = a0 - a6;

        const int a1 = -block[i+3*8] + (unsigned)block[i+5*8] - block[i+7*8] - (block[i+7*8]>>1);
        const int a3 =  block[i+1*8] + (unsigned)block[i+7*8] - block[i+3*8] - (block[i+3*8]>>1);
        const int a5 = -block[i+1*8] + (unsigned)block[i+7*8] + block[i+5*8] + (block[i+5*8]>>1);
        const int a7 =  block[i+3*8] + (unsigned)block[i+5*8] + block[i+1*8] + (block[i+1*8]>>1);

        const int b1 = (a7>>2) + (unsigned)a1;
        const int b3 =  (unsigned)a3 + (a5>>2);
        const int b5 = (a3>>2) - (unsigned)a5;
        const int b7 =  (unsigned)a7 - (a1>>2);

        block[i+0*8] = b0 + b7;
        block[i+7*8] = b0 - b7;
        block[i+1*8] = b2 + b5;
        block[i+6*8] = b2 - b5;
        block[i+2*8] = b4 + b3;
        block[i+5*8] = b4 - b3;
        block[i+3*8] = b6 + b1;
        block[i+4*8] = b6 - b1;
    }
    for( i = 0; i < 8; i++ )
    {
        const unsigned a0 =  block[0+i*8] + (unsigned)block[4+i*8];
        const unsigned a2 =  block[0+i*8] - (unsigned)block[4+i*8];
        const unsigned a4 = (block[2+i*8]>>1) - (unsigned)block[6+i*8];
        const unsigned a6 = (block[6+i*8]>>1) + (unsigned)block[2+i*8];

        const unsigned b0 = a0 + a6;
        const unsigned b2 = a2 + a4;
        const unsigned b4 = a2 - a4;
        const unsigned b6 = a0 - a6;

        const int a1 = -(unsigned)block[3+i*8] + block[5+i*8] - block[7+i*8] - (block[7+i*8]>>1);
        const int a3 =  (unsigned)block[1+i*8] + block[7+i*8] - block[3+i*8] - (block[3+i*8]>>1);
        const int a5 = -(unsigned)block[1+i*8] + block[7+i*8] + block[5+i*8] + (block[5+i*8]>>1);
        const int a7 =  (unsigned)block[3+i*8] + block[5+i*8] + block[1+i*8] + (block[1+i*8]>>1);

        const unsigned b1 = (a7>>2) + (unsigned)a1;
        const unsigned b3 =  (unsigned)a3 + (a5>>2);
        const unsigned b5 = (a3>>2) - (unsigned)a5;
        const unsigned b7 =  (unsigned)a7 - (a1>>2);

        dst[i + 0*stride] = av_clip_pixel( dst[i + 0*stride] + ((int)(b0 + b7) >> 6) );
        dst[i + 1*stride] = av_clip_pixel( dst[i + 1*stride] + ((int)(b2 + b5) >> 6) );
        dst[i + 2*stride] = av_clip_pixel( dst[i + 2*stride] + ((int)(b4 + b3) >> 6) );
        dst[i + 3*stride] = av_clip_pixel( dst[i + 3*stride] + ((int)(b6 + b1) >> 6) );
        dst[i + 4*stride] = av_clip_pixel( dst[i + 4*stride] + ((int)(b6 - b1) >> 6) );
        dst[i + 5*stride] = av_clip_pixel( dst[i + 5*stride] + ((int)(b4 - b3) >> 6) );
        dst[i + 6*stride] = av_clip_pixel( dst[i + 6*stride] + ((int)(b2 - b5) >> 6) );
        dst[i + 7*stride] = av_clip_pixel( dst[i + 7*stride] + ((int)(b0 - b7) >> 6) );
    }

    memset(block, 0, 64 * sizeof(dctcoef));
}

// assumes all AC coefs are 0
void FUNCC(ff_h264_idct_dc_add)(uint8_t *_dst, int16_t *_block, int stride){
    int i, j;
    pixel *dst = (pixel*)_dst;
    dctcoef *block = (dctcoef*)_block;
    int dc = (block[0] + 32) >> 6;
    stride /= sizeof(pixel);
    block[0] = 0;
    for( j = 0; j < 4; j++ )
    {
        for( i = 0; i < 4; i++ )
            dst[i] = av_clip_pixel( dst[i] + dc );
        dst += stride;
    }
}

void FUNCC(ff_h264_idct8_dc_add)(uint8_t *_dst, int16_t *_block, int stride){
    int i, j;
    pixel *dst = (pixel*)_dst;
    dctcoef *block = (dctcoef*)_block;
    int dc = (block[0] + 32) >> 6;
    block[0] = 0;
    stride /= sizeof(pixel);
    for( j = 0; j < 8; j++ )
    {
        for( i = 0; i < 8; i++ )
            dst[i] = av_clip_pixel( dst[i] + dc );
        dst += stride;
    }
}

void FUNCC(ff_h264_idct_add16)(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){
    int i;
    for(i=0; i<16; i++){
        int nnz = nnzc[ scan8[i] ];
        if(nnz){
            if(nnz==1 && ((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
            else                                  FUNCC(ff_h264_idct_add   )(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
        }
    }
}

void FUNCC(ff_h264_idct_add16intra)(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){
    int i;
    for(i=0; i<16; i++){
        if(nnzc[ scan8[i] ])             FUNCC(ff_h264_idct_add   )(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
        else if(((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
    }
}

void FUNCC(ff_h264_idct8_add4)(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){
    int i;
    for(i=0; i<16; i+=4){
        int nnz = nnzc[ scan8[i] ];
        if(nnz){
            if(nnz==1 && ((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct8_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
            else                                  FUNCC(ff_h264_idct8_add   )(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
        }
    }
}

void FUNCC(ff_h264_idct_add8)(uint8_t **dest, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){
    int i, j;
    for(j=1; j<3; j++){
        for(i=j*16; i<j*16+4; i++){
            if(nnzc[ scan8[i] ])
                FUNCC(ff_h264_idct_add   )(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride);
            else if(((dctcoef*)block)[i*16])
                FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride);
        }
    }
}

void FUNCC(ff_h264_idct_add8_422)(uint8_t **dest, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){
    int i, j;

    for(j=1; j<3; j++){
        for(i=j*16; i<j*16+4; i++){
            if(nnzc[ scan8[i] ])
                FUNCC(ff_h264_idct_add   )(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride);
            else if(((dctcoef*)block)[i*16])
                FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride);
        }
    }

    for(j=1; j<3; j++){
        for(i=j*16+4; i<j*16+8; i++){
            if(nnzc[ scan8[i+4] ])
                FUNCC(ff_h264_idct_add   )(dest[j-1] + block_offset[i+4], block + i*16*sizeof(pixel), stride);
            else if(((dctcoef*)block)[i*16])
                FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i+4], block + i*16*sizeof(pixel), stride);
        }
    }
}

/**
 * IDCT transforms the 16 dc values and dequantizes them.
 * @param qmul quantization parameter
 */
void FUNCC(ff_h264_luma_dc_dequant_idct)(int16_t *_output, int16_t *_input, int qmul){
#define stride 16
    int i;
    int temp[16];
    static const uint8_t x_offset[4]={0, 2*stride, 8*stride, 10*stride};
    dctcoef *input = (dctcoef*)_input;
    dctcoef *output = (dctcoef*)_output;

    for(i=0; i<4; i++){
        const int z0= input[4*i+0] + input[4*i+1];
        const int z1= input[4*i+0] - input[4*i+1];
        const int z2= input[4*i+2] - input[4*i+3];
        const int z3= input[4*i+2] + input[4*i+3];

        temp[4*i+0]= z0+z3;
        temp[4*i+1]= z0-z3;
        temp[4*i+2]= z1-z2;
        temp[4*i+3]= z1+z2;
    }

    for(i=0; i<4; i++){
        const int offset= x_offset[i];
        const SUINT z0= temp[4*0+i] + temp[4*2+i];
        const SUINT z1= temp[4*0+i] - temp[4*2+i];
        const SUINT z2= temp[4*1+i] - temp[4*3+i];
        const SUINT z3= temp[4*1+i] + temp[4*3+i];

        output[stride* 0+offset]= (int)((z0 + z3)*qmul + 128 ) >> 8;
        output[stride* 1+offset]= (int)((z1 + z2)*qmul + 128 ) >> 8;
        output[stride* 4+offset]= (int)((z1 - z2)*qmul + 128 ) >> 8;
        output[stride* 5+offset]= (int)((z0 - z3)*qmul + 128 ) >> 8;
    }
#undef stride
}

void FUNCC(ff_h264_chroma422_dc_dequant_idct)(int16_t *_block, int qmul){
    const int stride= 16*2;
    const int xStride= 16;
    int i;
    unsigned temp[8];
    static const uint8_t x_offset[2]={0, 16};
    dctcoef *block = (dctcoef*)_block;

    for(i=0; i<4; i++){
        temp[2*i+0] = block[stride*i + xStride*0] + (unsigned)block[stride*i + xStride*1];
        temp[2*i+1] = block[stride*i + xStride*0] - (unsigned)block[stride*i + xStride*1];
    }

    for(i=0; i<2; i++){
        const int offset= x_offset[i];
        const SUINT z0= temp[2*0+i] + temp[2*2+i];
        const SUINT z1= temp[2*0+i] - temp[2*2+i];
        const SUINT z2= temp[2*1+i] - temp[2*3+i];
        const SUINT z3= temp[2*1+i] + temp[2*3+i];

        block[stride*0+offset]= (int)((z0 + z3)*qmul + 128) >> 8;
        block[stride*1+offset]= (int)((z1 + z2)*qmul + 128) >> 8;
        block[stride*2+offset]= (int)((z1 - z2)*qmul + 128) >> 8;
        block[stride*3+offset]= (int)((z0 - z3)*qmul + 128) >> 8;
    }
}

void FUNCC(ff_h264_chroma_dc_dequant_idct)(int16_t *_block, int qmul){
    const int stride= 16*2;
    const int xStride= 16;
    SUINT a,b,c,d,e;
    dctcoef *block = (dctcoef*)_block;

    a= block[stride*0 + xStride*0];
    b= block[stride*0 + xStride*1];
    c= block[stride*1 + xStride*0];
    d= block[stride*1 + xStride*1];

    e= a-b;
    a= a+b;
    b= c-d;
    c= c+d;

    block[stride*0 + xStride*0]= (int)((a+c)*qmul) >> 7;
    block[stride*0 + xStride*1]= (int)((e+b)*qmul) >> 7;
    block[stride*1 + xStride*0]= (int)((a-c)*qmul) >> 7;
    block[stride*1 + xStride*1]= (int)((e-b)*qmul) >> 7;
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* H.264 IDCT
3			* Copyright (c) 2004-2011 Michael Niedermayer <michaelni@gmx.at>
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			/**
23			* @file
24			* H.264 IDCT.
25			* @author Michael Niedermayer <michaelni@gmx.at>
26			*/
27
28			#include "bit_depth_template.c"
29			#include "libavutil/common.h"
30			#include "h264dec.h"
31			#include "h264idct.h"
32
33		102123278	void FUNCC(ff_h264_idct_add)(uint8_t _dst, int16_t _block, int stride)
34			{
35			int i;
36		102123278	pixel dst = (pixel)_dst;
37		102123278	dctcoef block = (dctcoef)_block;
38		102123278	stride >>= sizeof(pixel)-1;
39
40		102123278	block[0] += 1 << 5;
41
42	✓✓	510616390	for(i=0; i<4; i++){
43		408493112	const SUINT z0= block[i + 40] + (unsigned)block[i + 42];
44		408493112	const SUINT z1= block[i + 40] - (unsigned)block[i + 42];
45		408493112	const SUINT z2= (block[i + 41]>>1) - (unsigned)block[i + 43];
46		408493112	const SUINT z3= block[i + 41] + (unsigned)(block[i + 43]>>1);
47
48		408493112	block[i + 4*0]= z0 + z3;
49		408493112	block[i + 4*1]= z1 + z2;
50		408493112	block[i + 4*2]= z1 - z2;
51		408493112	block[i + 4*3]= z0 - z3;
52			}
53
54	✓✓	510616390	for(i=0; i<4; i++){
55		408493112	const SUINT z0= block[0 + 4i] + (SUINT)block[2 + 4i];
56		408493112	const SUINT z1= block[0 + 4i] - (SUINT)block[2 + 4i];
57		408493112	const SUINT z2= (block[1 + 4i]>>1) - (SUINT)block[3 + 4i];
58		408493112	const SUINT z3= block[1 + 4i] + (SUINT)(block[3 + 4i]>>1);
59
60		408493112	dst[i + 0stride]= av_clip_pixel(dst[i + 0stride] + ((int)(z0 + z3) >> 6));
61		408493112	dst[i + 1stride]= av_clip_pixel(dst[i + 1stride] + ((int)(z1 + z2) >> 6));
62		408493112	dst[i + 2stride]= av_clip_pixel(dst[i + 2stride] + ((int)(z1 - z2) >> 6));
63		408493112	dst[i + 3stride]= av_clip_pixel(dst[i + 3stride] + ((int)(z0 - z3) >> 6));
64			}
65
66		102123278	memset(block, 0, 16 * sizeof(dctcoef));
67			}
68
69		13254736	void FUNCC(ff_h264_idct8_add)(uint8_t _dst, int16_t _block, int stride){
70			int i;
71		13254736	pixel dst = (pixel)_dst;
72		13254736	dctcoef block = (dctcoef)_block;
73		13254736	stride >>= sizeof(pixel)-1;
74
75		13254736	block[0] += 32;
76
77	✓✓	119292624	for( i = 0; i < 8; i++ )
78			{
79		106037888	const unsigned int a0 = block[i+08] + (unsigned)block[i+48];
80		106037888	const unsigned int a2 = block[i+08] - (unsigned)block[i+48];
81		106037888	const unsigned int a4 = (block[i+28]>>1) - (unsigned)block[i+68];
82		106037888	const unsigned int a6 = (block[i+68]>>1) + (unsigned)block[i+28];
83
84		106037888	const unsigned int b0 = a0 + a6;
85		106037888	const unsigned int b2 = a2 + a4;
86		106037888	const unsigned int b4 = a2 - a4;
87		106037888	const unsigned int b6 = a0 - a6;
88
89		106037888	const int a1 = -block[i+38] + (unsigned)block[i+58] - block[i+78] - (block[i+78]>>1);
90		106037888	const int a3 = block[i+18] + (unsigned)block[i+78] - block[i+38] - (block[i+38]>>1);
91		106037888	const int a5 = -block[i+18] + (unsigned)block[i+78] + block[i+58] + (block[i+58]>>1);
92		106037888	const int a7 = block[i+38] + (unsigned)block[i+58] + block[i+18] + (block[i+18]>>1);
93
94		106037888	const int b1 = (a7>>2) + (unsigned)a1;
95		106037888	const int b3 = (unsigned)a3 + (a5>>2);
96		106037888	const int b5 = (a3>>2) - (unsigned)a5;
97		106037888	const int b7 = (unsigned)a7 - (a1>>2);
98
99		106037888	block[i+0*8] = b0 + b7;
100		106037888	block[i+7*8] = b0 - b7;
101		106037888	block[i+1*8] = b2 + b5;
102		106037888	block[i+6*8] = b2 - b5;
103		106037888	block[i+2*8] = b4 + b3;
104		106037888	block[i+5*8] = b4 - b3;
105		106037888	block[i+3*8] = b6 + b1;
106		106037888	block[i+4*8] = b6 - b1;
107			}
108	✓✓	119292624	for( i = 0; i < 8; i++ )
109			{
110		106037888	const unsigned a0 = block[0+i8] + (unsigned)block[4+i8];
111		106037888	const unsigned a2 = block[0+i8] - (unsigned)block[4+i8];
112		106037888	const unsigned a4 = (block[2+i8]>>1) - (unsigned)block[6+i8];
113		106037888	const unsigned a6 = (block[6+i8]>>1) + (unsigned)block[2+i8];
114
115		106037888	const unsigned b0 = a0 + a6;
116		106037888	const unsigned b2 = a2 + a4;
117		106037888	const unsigned b4 = a2 - a4;
118		106037888	const unsigned b6 = a0 - a6;
119
120		106037888	const int a1 = -(unsigned)block[3+i8] + block[5+i8] - block[7+i8] - (block[7+i8]>>1);
121		106037888	const int a3 = (unsigned)block[1+i8] + block[7+i8] - block[3+i8] - (block[3+i8]>>1);
122		106037888	const int a5 = -(unsigned)block[1+i8] + block[7+i8] + block[5+i8] + (block[5+i8]>>1);
123		106037888	const int a7 = (unsigned)block[3+i8] + block[5+i8] + block[1+i8] + (block[1+i8]>>1);
124
125		106037888	const unsigned b1 = (a7>>2) + (unsigned)a1;
126		106037888	const unsigned b3 = (unsigned)a3 + (a5>>2);
127		106037888	const unsigned b5 = (a3>>2) - (unsigned)a5;
128		106037888	const unsigned b7 = (unsigned)a7 - (a1>>2);
129
130		106037888	dst[i + 0stride] = av_clip_pixel( dst[i + 0stride] + ((int)(b0 + b7) >> 6) );
131		106037888	dst[i + 1stride] = av_clip_pixel( dst[i + 1stride] + ((int)(b2 + b5) >> 6) );
132		106037888	dst[i + 2stride] = av_clip_pixel( dst[i + 2stride] + ((int)(b4 + b3) >> 6) );
133		106037888	dst[i + 3stride] = av_clip_pixel( dst[i + 3stride] + ((int)(b6 + b1) >> 6) );
134		106037888	dst[i + 4stride] = av_clip_pixel( dst[i + 4stride] + ((int)(b6 - b1) >> 6) );
135		106037888	dst[i + 5stride] = av_clip_pixel( dst[i + 5stride] + ((int)(b4 - b3) >> 6) );
136		106037888	dst[i + 6stride] = av_clip_pixel( dst[i + 6stride] + ((int)(b2 - b5) >> 6) );
137		106037888	dst[i + 7stride] = av_clip_pixel( dst[i + 7stride] + ((int)(b0 - b7) >> 6) );
138			}
139
140		13254736	memset(block, 0, 64 * sizeof(dctcoef));
141			}
142
143			// assumes all AC coefs are 0
144		56160488	void FUNCC(ff_h264_idct_dc_add)(uint8_t _dst, int16_t _block, int stride){
145			int i, j;
146		56160488	pixel dst = (pixel)_dst;
147		56160488	dctcoef block = (dctcoef)_block;
148		56160488	int dc = (block[0] + 32) >> 6;
149		56160488	stride /= sizeof(pixel);
150		56160488	block[0] = 0;
151	✓✓	280802440	for( j = 0; j < 4; j++ )
152			{
153	✓✓	1123209760	for( i = 0; i < 4; i++ )
154		898567808	dst[i] = av_clip_pixel( dst[i] + dc );
155		224641952	dst += stride;
156			}
157			}
158
159		1138878	void FUNCC(ff_h264_idct8_dc_add)(uint8_t _dst, int16_t _block, int stride){
160			int i, j;
161		1138878	pixel dst = (pixel)_dst;
162		1138878	dctcoef block = (dctcoef)_block;
163		1138878	int dc = (block[0] + 32) >> 6;
164		1138878	block[0] = 0;
165		1138878	stride /= sizeof(pixel);
166	✓✓	10249902	for( j = 0; j < 8; j++ )
167			{
168	✓✓	81999216	for( i = 0; i < 8; i++ )
169		72888192	dst[i] = av_clip_pixel( dst[i] + dc );
170		9111024	dst += stride;
171			}
172			}
173
174		8724060	void FUNCC(ff_h264_idct_add16)(uint8_t dst, const int block_offset, int16_t block, int stride, const uint8_t nnzc[158]){
175			int i;
176	✓✓	148309020	for(i=0; i<16; i++){
177		139584960	int nnz = nnzc[ scan8[i] ];
178	✓✓	139584960	if(nnz){
179	✓✓✓✓	52827334	if(nnz==1 && ((dctcoef)block)[i16]) FUNCC(ff_h264_idct_dc_add)(dst + block_offset[i], block + i16sizeof(pixel), stride);
180		43924208	else FUNCC(ff_h264_idct_add )(dst + block_offset[i], block + i16sizeof(pixel), stride);
181			}
182			}
183			}
184
185		1688410	void FUNCC(ff_h264_idct_add16intra)(uint8_t dst, const int block_offset, int16_t block, int stride, const uint8_t nnzc[158]){
186			int i;
187	✓✓	28702970	for(i=0; i<16; i++){
188	✓✓	27014560	if(nnzc[ scan8[i] ]) FUNCC(ff_h264_idct_add )(dst + block_offset[i], block + i16sizeof(pixel), stride);
189	✓✓	19682114	else if(((dctcoef)block)[i16]) FUNCC(ff_h264_idct_dc_add)(dst + block_offset[i], block + i16sizeof(pixel), stride);
190			}
191			}
192
193		1662312	void FUNCC(ff_h264_idct8_add4)(uint8_t dst, const int block_offset, int16_t block, int stride, const uint8_t nnzc[158]){
194			int i;
195	✓✓	8311560	for(i=0; i<16; i+=4){
196		6649248	int nnz = nnzc[ scan8[i] ];
197	✓✓	6649248	if(nnz){
198	✓✓✓✓	4307960	if(nnz==1 && ((dctcoef)block)[i16]) FUNCC(ff_h264_idct8_dc_add)(dst + block_offset[i], block + i16sizeof(pixel), stride);
199		3648706	else FUNCC(ff_h264_idct8_add )(dst + block_offset[i], block + i16sizeof(pixel), stride);
200			}
201			}
202			}
203
204		8316326	void FUNCC(ff_h264_idct_add8)(uint8_t *dest, const int block_offset, int16_t block, int stride, const uint8_t nnzc[158]){
205			int i, j;
206	✓✓	24948978	for(j=1; j<3; j++){
207	✓✓	83163260	for(i=j16; i<j16+4; i++){
208	✓✓	66530608	if(nnzc[ scan8[i] ])
209		15887052	FUNCC(ff_h264_idct_add )(dest[j-1] + block_offset[i], block + i16sizeof(pixel), stride);
210	✓✓	50643556	else if(((dctcoef)block)[i16])
211		24322174	FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i], block + i16sizeof(pixel), stride);
212			}
213			}
214			}
215
216		1350636	void FUNCC(ff_h264_idct_add8_422)(uint8_t *dest, const int block_offset, int16_t block, int stride, const uint8_t nnzc[158]){
217			int i, j;
218
219	✓✓	4051908	for(j=1; j<3; j++){
220	✓✓	13506360	for(i=j16; i<j16+4; i++){
221	✓✓	10805088	if(nnzc[ scan8[i] ])
222		3641714	FUNCC(ff_h264_idct_add )(dest[j-1] + block_offset[i], block + i16sizeof(pixel), stride);
223	✓✓	7163374	else if(((dctcoef)block)[i16])
224		4581790	FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i], block + i16sizeof(pixel), stride);
225			}
226			}
227
228	✓✓	4051908	for(j=1; j<3; j++){
229	✓✓	13506360	for(i=j16+4; i<j16+8; i++){
230	✓✓	10805088	if(nnzc[ scan8[i+4] ])
231		3691780	FUNCC(ff_h264_idct_add )(dest[j-1] + block_offset[i+4], block + i16sizeof(pixel), stride);
232	✓✓	7113308	else if(((dctcoef)block)[i16])
233		4646866	FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i+4], block + i16sizeof(pixel), stride);
234			}
235			}
236			}
237
238			/**
239			* IDCT transforms the 16 dc values and dequantizes them.
240			* @param qmul quantization parameter
241			*/
242		1145372	void FUNCC(ff_h264_luma_dc_dequant_idct)(int16_t _output, int16_t _input, int qmul){
243			#define stride 16
244			int i;
245			int temp[16];
246			static const uint8_t x_offset[4]={0, 2stride, 8stride, 10*stride};
247		1145372	dctcoef input = (dctcoef)_input;
248		1145372	dctcoef output = (dctcoef)_output;
249
250	✓✓	5726860	for(i=0; i<4; i++){
251		4581488	const int z0= input[4i+0] + input[4i+1];
252		4581488	const int z1= input[4i+0] - input[4i+1];
253		4581488	const int z2= input[4i+2] - input[4i+3];
254		4581488	const int z3= input[4i+2] + input[4i+3];
255
256		4581488	temp[4*i+0]= z0+z3;
257		4581488	temp[4*i+1]= z0-z3;
258		4581488	temp[4*i+2]= z1-z2;
259		4581488	temp[4*i+3]= z1+z2;
260			}
261
262	✓✓	5726860	for(i=0; i<4; i++){
263		4581488	const int offset= x_offset[i];
264		4581488	const SUINT z0= temp[40+i] + temp[42+i];
265		4581488	const SUINT z1= temp[40+i] - temp[42+i];
266		4581488	const SUINT z2= temp[41+i] - temp[43+i];
267		4581488	const SUINT z3= temp[41+i] + temp[43+i];
268
269		4581488	output[stride* 0+offset]= (int)((z0 + z3)*qmul + 128 ) >> 8;
270		4581488	output[stride* 1+offset]= (int)((z1 + z2)*qmul + 128 ) >> 8;
271		4581488	output[stride* 4+offset]= (int)((z1 - z2)*qmul + 128 ) >> 8;
272		4581488	output[stride* 5+offset]= (int)((z0 - z3)*qmul + 128 ) >> 8;
273			}
274			#undef stride
275			}
276
277		2252062	void FUNCC(ff_h264_chroma422_dc_dequant_idct)(int16_t *_block, int qmul){
278		2252062	const int stride= 16*2;
279		2252062	const int xStride= 16;
280			int i;
281			unsigned temp[8];
282			static const uint8_t x_offset[2]={0, 16};
283		2252062	dctcoef block = (dctcoef)_block;
284
285	✓✓	11260310	for(i=0; i<4; i++){
286		9008248	temp[2i+0] = block[stridei + xStride0] + (unsigned)block[stridei + xStride*1];
287		9008248	temp[2i+1] = block[stridei + xStride0] - (unsigned)block[stridei + xStride*1];
288			}
289
290	✓✓	6756186	for(i=0; i<2; i++){
291		4504124	const int offset= x_offset[i];
292		4504124	const SUINT z0= temp[20+i] + temp[22+i];
293		4504124	const SUINT z1= temp[20+i] - temp[22+i];
294		4504124	const SUINT z2= temp[21+i] - temp[23+i];
295		4504124	const SUINT z3= temp[21+i] + temp[23+i];
296
297		4504124	block[stride0+offset]= (int)((z0 + z3)qmul + 128) >> 8;
298		4504124	block[stride1+offset]= (int)((z1 + z2)qmul + 128) >> 8;
299		4504124	block[stride2+offset]= (int)((z1 - z2)qmul + 128) >> 8;
300		4504124	block[stride3+offset]= (int)((z0 - z3)qmul + 128) >> 8;
301			}
302			}
303
304		11816584	void FUNCC(ff_h264_chroma_dc_dequant_idct)(int16_t *_block, int qmul){
305		11816584	const int stride= 16*2;
306		11816584	const int xStride= 16;
307			SUINT a,b,c,d,e;
308		11816584	dctcoef block = (dctcoef)_block;
309
310		11816584	a= block[stride0 + xStride0];
311		11816584	b= block[stride0 + xStride1];
312		11816584	c= block[stride1 + xStride0];
313		11816584	d= block[stride1 + xStride1];
314
315		11816584	e= a-b;
316		11816584	a= a+b;
317		11816584	b= c-d;
318		11816584	c= c+d;
319
320		11816584	block[stride0 + xStride0]= (int)((a+c)*qmul) >> 7;
321		11816584	block[stride0 + xStride1]= (int)((e+b)*qmul) >> 7;
322		11816584	block[stride1 + xStride0]= (int)((a-c)*qmul) >> 7;
323		11816584	block[stride1 + xStride1]= (int)((e-b)*qmul) >> 7;
324			}