Head

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/faandct.c	Lines:	68	100	68.0 %
Date:	2020-01-28 04:56:05	Branches:	4	6	66.7 %


/*
 * Floating point AAN DCT
 * this implementation is based upon the IJG integer AAN DCT (see jfdctfst.c)
 *
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 * Copyright (c) 2003 Roman Shaposhnik
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/**
 * @file
 * @brief
 *     Floating point AAN DCT
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

#include "faandct.h"
#include "libavutil/internal.h"
#include "libavutil/libm.h"

typedef float FLOAT;

/* numbers generated by arbitrary precision arithmetic followed by truncation
to 36 fractional digits (enough for a 128-bit IEEE quad, see /usr/include/math.h
for this approach). Unfortunately, long double is not always available correctly,
e.g ppc has issues.
TODO: add L suffixes when ppc and toolchains sort out their stuff.
*/
#define B0 1.000000000000000000000000000000000000
#define B1 0.720959822006947913789091890943021267 // (cos(pi*1/16)sqrt(2))^-1
#define B2 0.765366864730179543456919968060797734 // (cos(pi*2/16)sqrt(2))^-1
#define B3 0.850430094767256448766702844371412325 // (cos(pi*3/16)sqrt(2))^-1
#define B4 1.000000000000000000000000000000000000 // (cos(pi*4/16)sqrt(2))^-1
#define B5 1.272758580572833938461007018281767032 // (cos(pi*5/16)sqrt(2))^-1
#define B6 1.847759065022573512256366378793576574 // (cos(pi*6/16)sqrt(2))^-1
#define B7 3.624509785411551372409941227504289587 // (cos(pi*7/16)sqrt(2))^-1

#define A1 M_SQRT1_2              // cos(pi*4/16)
#define A2 0.54119610014619698435 // cos(pi*6/16)sqrt(2)
#define A5 0.38268343236508977170 // cos(pi*6/16)
#define A4 1.30656296487637652774 // cos(pi*2/16)sqrt(2)

static const FLOAT postscale[64]={
B0*B0, B0*B1, B0*B2, B0*B3, B0*B4, B0*B5, B0*B6, B0*B7,
B1*B0, B1*B1, B1*B2, B1*B3, B1*B4, B1*B5, B1*B6, B1*B7,
B2*B0, B2*B1, B2*B2, B2*B3, B2*B4, B2*B5, B2*B6, B2*B7,
B3*B0, B3*B1, B3*B2, B3*B3, B3*B4, B3*B5, B3*B6, B3*B7,
B4*B0, B4*B1, B4*B2, B4*B3, B4*B4, B4*B5, B4*B6, B4*B7,
B5*B0, B5*B1, B5*B2, B5*B3, B5*B4, B5*B5, B5*B6, B5*B7,
B6*B0, B6*B1, B6*B2, B6*B3, B6*B4, B6*B5, B6*B6, B6*B7,
B7*B0, B7*B1, B7*B2, B7*B3, B7*B4, B7*B5, B7*B6, B7*B7,
};

static av_always_inline void row_fdct(FLOAT temp[64], int16_t *data)
{
    FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
    FLOAT tmp10, tmp11, tmp12, tmp13;
    FLOAT z2, z4, z11, z13;
    int i;

    for (i=0; i<8*8; i+=8) {
        tmp0= data[0 + i] + data[7 + i];
        tmp7= data[0 + i] - data[7 + i];
        tmp1= data[1 + i] + data[6 + i];
        tmp6= data[1 + i] - data[6 + i];
        tmp2= data[2 + i] + data[5 + i];
        tmp5= data[2 + i] - data[5 + i];
        tmp3= data[3 + i] + data[4 + i];
        tmp4= data[3 + i] - data[4 + i];

        tmp10= tmp0 + tmp3;
        tmp13= tmp0 - tmp3;
        tmp11= tmp1 + tmp2;
        tmp12= tmp1 - tmp2;

        temp[0 + i]= tmp10 + tmp11;
        temp[4 + i]= tmp10 - tmp11;

        tmp12 += tmp13;
        tmp12 *= A1;
        temp[2 + i]= tmp13 + tmp12;
        temp[6 + i]= tmp13 - tmp12;

        tmp4 += tmp5;
        tmp5 += tmp6;
        tmp6 += tmp7;

        z2= tmp4*(A2+A5) - tmp6*A5;
        z4= tmp6*(A4-A5) + tmp4*A5;

        tmp5*=A1;

        z11= tmp7 + tmp5;
        z13= tmp7 - tmp5;

        temp[5 + i]= z13 + z2;
        temp[3 + i]= z13 - z2;
        temp[1 + i]= z11 + z4;
        temp[7 + i]= z11 - z4;
    }
}

void ff_faandct(int16_t *data)
{
    FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
    FLOAT tmp10, tmp11, tmp12, tmp13;
    FLOAT z2, z4, z11, z13;
    FLOAT temp[64];
    int i;

    emms_c();

    row_fdct(temp, data);

    for (i=0; i<8; i++) {
        tmp0= temp[8*0 + i] + temp[8*7 + i];
        tmp7= temp[8*0 + i] - temp[8*7 + i];
        tmp1= temp[8*1 + i] + temp[8*6 + i];
        tmp6= temp[8*1 + i] - temp[8*6 + i];
        tmp2= temp[8*2 + i] + temp[8*5 + i];
        tmp5= temp[8*2 + i] - temp[8*5 + i];
        tmp3= temp[8*3 + i] + temp[8*4 + i];
        tmp4= temp[8*3 + i] - temp[8*4 + i];

        tmp10= tmp0 + tmp3;
        tmp13= tmp0 - tmp3;
        tmp11= tmp1 + tmp2;
        tmp12= tmp1 - tmp2;

        data[8*0 + i]= lrintf(postscale[8*0 + i] * (tmp10 + tmp11));
        data[8*4 + i]= lrintf(postscale[8*4 + i] * (tmp10 - tmp11));

        tmp12 += tmp13;
        tmp12 *= A1;
        data[8*2 + i]= lrintf(postscale[8*2 + i] * (tmp13 + tmp12));
        data[8*6 + i]= lrintf(postscale[8*6 + i] * (tmp13 - tmp12));

        tmp4 += tmp5;
        tmp5 += tmp6;
        tmp6 += tmp7;

        z2= tmp4*(A2+A5) - tmp6*A5;
        z4= tmp6*(A4-A5) + tmp4*A5;

        tmp5*=A1;

        z11= tmp7 + tmp5;
        z13= tmp7 - tmp5;

        data[8*5 + i]= lrintf(postscale[8*5 + i] * (z13 + z2));
        data[8*3 + i]= lrintf(postscale[8*3 + i] * (z13 - z2));
        data[8*1 + i]= lrintf(postscale[8*1 + i] * (z11 + z4));
        data[8*7 + i]= lrintf(postscale[8*7 + i] * (z11 - z4));
    }
}

void ff_faandct248(int16_t *data)
{
    FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
    FLOAT tmp10, tmp11, tmp12, tmp13;
    FLOAT temp[64];
    int i;

    emms_c();

    row_fdct(temp, data);

    for (i=0; i<8; i++) {
        tmp0 = temp[8*0 + i] + temp[8*1 + i];
        tmp1 = temp[8*2 + i] + temp[8*3 + i];
        tmp2 = temp[8*4 + i] + temp[8*5 + i];
        tmp3 = temp[8*6 + i] + temp[8*7 + i];
        tmp4 = temp[8*0 + i] - temp[8*1 + i];
        tmp5 = temp[8*2 + i] - temp[8*3 + i];
        tmp6 = temp[8*4 + i] - temp[8*5 + i];
        tmp7 = temp[8*6 + i] - temp[8*7 + i];

        tmp10 = tmp0 + tmp3;
        tmp11 = tmp1 + tmp2;
        tmp12 = tmp1 - tmp2;
        tmp13 = tmp0 - tmp3;

        data[8*0 + i] = lrintf(postscale[8*0 + i] * (tmp10 + tmp11));
        data[8*4 + i] = lrintf(postscale[8*4 + i] * (tmp10 - tmp11));

        tmp12 += tmp13;
        tmp12 *= A1;
        data[8*2 + i] = lrintf(postscale[8*2 + i] * (tmp13 + tmp12));
        data[8*6 + i] = lrintf(postscale[8*6 + i] * (tmp13 - tmp12));

        tmp10 = tmp4 + tmp7;
        tmp11 = tmp5 + tmp6;
        tmp12 = tmp5 - tmp6;
        tmp13 = tmp4 - tmp7;

        data[8*1 + i] = lrintf(postscale[8*0 + i] * (tmp10 + tmp11));
        data[8*5 + i] = lrintf(postscale[8*4 + i] * (tmp10 - tmp11));

        tmp12 += tmp13;
        tmp12 *= A1;
        data[8*3 + i] = lrintf(postscale[8*2 + i] * (tmp13 + tmp12));
        data[8*7 + i] = lrintf(postscale[8*6 + i] * (tmp13 - tmp12));
    }
}


Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/*
2			* Floating point AAN DCT
3			* this implementation is based upon the IJG integer AAN DCT (see jfdctfst.c)
4			*
5			* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
6			* Copyright (c) 2003 Roman Shaposhnik
7			*
8			* Permission to use, copy, modify, and/or distribute this software for any
9			* purpose with or without fee is hereby granted, provided that the above
10			* copyright notice and this permission notice appear in all copies.
11			*
12			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19			*/
20
21			/**
22			* @file
23			* @brief
24			* Floating point AAN DCT
25			* @author Michael Niedermayer <michaelni@gmx.at>
26			*/
27
28			#include "faandct.h"
29			#include "libavutil/internal.h"
30			#include "libavutil/libm.h"
31
32			typedef float FLOAT;
33
34			/* numbers generated by arbitrary precision arithmetic followed by truncation
35			to 36 fractional digits (enough for a 128-bit IEEE quad, see /usr/include/math.h
36			for this approach). Unfortunately, long double is not always available correctly,
37			e.g ppc has issues.
38			TODO: add L suffixes when ppc and toolchains sort out their stuff.
39			*/
40			#define B0 1.000000000000000000000000000000000000
41			#define B1 0.720959822006947913789091890943021267 // (cos(pi*1/16)sqrt(2))^-1
42			#define B2 0.765366864730179543456919968060797734 // (cos(pi*2/16)sqrt(2))^-1
43			#define B3 0.850430094767256448766702844371412325 // (cos(pi*3/16)sqrt(2))^-1
44			#define B4 1.000000000000000000000000000000000000 // (cos(pi*4/16)sqrt(2))^-1
45			#define B5 1.272758580572833938461007018281767032 // (cos(pi*5/16)sqrt(2))^-1
46			#define B6 1.847759065022573512256366378793576574 // (cos(pi*6/16)sqrt(2))^-1
47			#define B7 3.624509785411551372409941227504289587 // (cos(pi*7/16)sqrt(2))^-1
48
49			#define A1 M_SQRT1_2 // cos(pi*4/16)
50			#define A2 0.54119610014619698435 // cos(pi*6/16)sqrt(2)
51			#define A5 0.38268343236508977170 // cos(pi*6/16)
52			#define A4 1.30656296487637652774 // cos(pi*2/16)sqrt(2)
53
54			static const FLOAT postscale[64]={
55			B0B0, B0B1, B0B2, B0B3, B0B4, B0B5, B0B6, B0B7,
56			B1B0, B1B1, B1B2, B1B3, B1B4, B1B5, B1B6, B1B7,
57			B2B0, B2B1, B2B2, B2B3, B2B4, B2B5, B2B6, B2B7,
58			B3B0, B3B1, B3B2, B3B3, B3B4, B3B5, B3B6, B3B7,
59			B4B0, B4B1, B4B2, B4B3, B4B4, B4B5, B4B6, B4B7,
60			B5B0, B5B1, B5B2, B5B3, B5B4, B5B5, B5B6, B5B7,
61			B6B0, B6B1, B6B2, B6B3, B6B4, B6B5, B6B6, B6B7,
62			B7B0, B7B1, B7B2, B7B3, B7B4, B7B5, B7B6, B7B7,
63			};
64
65		20000	static av_always_inline void row_fdct(FLOAT temp[64], int16_t *data)
66			{
67			FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
68			FLOAT tmp10, tmp11, tmp12, tmp13;
69			FLOAT z2, z4, z11, z13;
70			int i;
71
72	✓✓	180000	for (i=0; i<8*8; i+=8) {
73		160000	tmp0= data[0 + i] + data[7 + i];
74		160000	tmp7= data[0 + i] - data[7 + i];
75		160000	tmp1= data[1 + i] + data[6 + i];
76		160000	tmp6= data[1 + i] - data[6 + i];
77		160000	tmp2= data[2 + i] + data[5 + i];
78		160000	tmp5= data[2 + i] - data[5 + i];
79		160000	tmp3= data[3 + i] + data[4 + i];
80		160000	tmp4= data[3 + i] - data[4 + i];
81
82		160000	tmp10= tmp0 + tmp3;
83		160000	tmp13= tmp0 - tmp3;
84		160000	tmp11= tmp1 + tmp2;
85		160000	tmp12= tmp1 - tmp2;
86
87		160000	temp[0 + i]= tmp10 + tmp11;
88		160000	temp[4 + i]= tmp10 - tmp11;
89
90		160000	tmp12 += tmp13;
91		160000	tmp12 *= A1;
92		160000	temp[2 + i]= tmp13 + tmp12;
93		160000	temp[6 + i]= tmp13 - tmp12;
94
95		160000	tmp4 += tmp5;
96		160000	tmp5 += tmp6;
97		160000	tmp6 += tmp7;
98
99		160000	z2= tmp4(A2+A5) - tmp6A5;
100		160000	z4= tmp6(A4-A5) + tmp4A5;
101
102		160000	tmp5*=A1;
103
104		160000	z11= tmp7 + tmp5;
105		160000	z13= tmp7 - tmp5;
106
107		160000	temp[5 + i]= z13 + z2;
108		160000	temp[3 + i]= z13 - z2;
109		160000	temp[1 + i]= z11 + z4;
110		160000	temp[7 + i]= z11 - z4;
111			}
112		20000	}
113
114		20000	void ff_faandct(int16_t *data)
115			{
116			FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
117			FLOAT tmp10, tmp11, tmp12, tmp13;
118			FLOAT z2, z4, z11, z13;
119			FLOAT temp[64];
120			int i;
121
122		20000	emms_c();
123
124		20000	row_fdct(temp, data);
125
126	✓✓	180000	for (i=0; i<8; i++) {
127		160000	tmp0= temp[80 + i] + temp[87 + i];
128		160000	tmp7= temp[80 + i] - temp[87 + i];
129		160000	tmp1= temp[81 + i] + temp[86 + i];
130		160000	tmp6= temp[81 + i] - temp[86 + i];
131		160000	tmp2= temp[82 + i] + temp[85 + i];
132		160000	tmp5= temp[82 + i] - temp[85 + i];
133		160000	tmp3= temp[83 + i] + temp[84 + i];
134		160000	tmp4= temp[83 + i] - temp[84 + i];
135
136		160000	tmp10= tmp0 + tmp3;
137		160000	tmp13= tmp0 - tmp3;
138		160000	tmp11= tmp1 + tmp2;
139		160000	tmp12= tmp1 - tmp2;
140
141		160000	data[80 + i]= lrintf(postscale[80 + i] * (tmp10 + tmp11));
142		160000	data[84 + i]= lrintf(postscale[84 + i] * (tmp10 - tmp11));
143
144		160000	tmp12 += tmp13;
145		160000	tmp12 *= A1;
146		160000	data[82 + i]= lrintf(postscale[82 + i] * (tmp13 + tmp12));
147		160000	data[86 + i]= lrintf(postscale[86 + i] * (tmp13 - tmp12));
148
149		160000	tmp4 += tmp5;
150		160000	tmp5 += tmp6;
151		160000	tmp6 += tmp7;
152
153		160000	z2= tmp4(A2+A5) - tmp6A5;
154		160000	z4= tmp6(A4-A5) + tmp4A5;
155
156		160000	tmp5*=A1;
157
158		160000	z11= tmp7 + tmp5;
159		160000	z13= tmp7 - tmp5;
160
161		160000	data[85 + i]= lrintf(postscale[85 + i] * (z13 + z2));
162		160000	data[83 + i]= lrintf(postscale[83 + i] * (z13 - z2));
163		160000	data[81 + i]= lrintf(postscale[81 + i] * (z11 + z4));
164		160000	data[87 + i]= lrintf(postscale[87 + i] * (z11 - z4));
165			}
166		20000	}
167
168			void ff_faandct248(int16_t *data)
169			{
170			FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
171			FLOAT tmp10, tmp11, tmp12, tmp13;
172			FLOAT temp[64];
173			int i;
174
175			emms_c();
176
177			row_fdct(temp, data);
178
179			for (i=0; i<8; i++) {
180			tmp0 = temp[80 + i] + temp[81 + i];
181			tmp1 = temp[82 + i] + temp[83 + i];
182			tmp2 = temp[84 + i] + temp[85 + i];
183			tmp3 = temp[86 + i] + temp[87 + i];
184			tmp4 = temp[80 + i] - temp[81 + i];
185			tmp5 = temp[82 + i] - temp[83 + i];
186			tmp6 = temp[84 + i] - temp[85 + i];
187			tmp7 = temp[86 + i] - temp[87 + i];
188
189			tmp10 = tmp0 + tmp3;
190			tmp11 = tmp1 + tmp2;
191			tmp12 = tmp1 - tmp2;
192			tmp13 = tmp0 - tmp3;
193
194			data[80 + i] = lrintf(postscale[80 + i] * (tmp10 + tmp11));
195			data[84 + i] = lrintf(postscale[84 + i] * (tmp10 - tmp11));
196
197			tmp12 += tmp13;
198			tmp12 *= A1;
199			data[82 + i] = lrintf(postscale[82 + i] * (tmp13 + tmp12));
200			data[86 + i] = lrintf(postscale[86 + i] * (tmp13 - tmp12));
201
202			tmp10 = tmp4 + tmp7;
203			tmp11 = tmp5 + tmp6;
204			tmp12 = tmp5 - tmp6;
205			tmp13 = tmp4 - tmp7;
206
207			data[81 + i] = lrintf(postscale[80 + i] * (tmp10 + tmp11));
208			data[85 + i] = lrintf(postscale[84 + i] * (tmp10 - tmp11));
209
210			tmp12 += tmp13;
211			tmp12 *= A1;
212			data[83 + i] = lrintf(postscale[82 + i] * (tmp13 + tmp12));
213			data[87 + i] = lrintf(postscale[86 + i] * (tmp13 - tmp12));
214			}
215			}