FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/lossless_videodsp.c	Lines:	54	55	98.2 %
Date:	2021-01-21 13:05:02	Branches:	15	16	93.8 %


/*
 * Lossless video DSP utils
 *
 * 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
 */
#include "avcodec.h"
#include "lossless_videodsp.h"
#include "libavcodec/mathops.h"

// 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size
#define pb_7f (~0UL / 255 * 0x7f)
#define pb_80 (~0UL / 255 * 0x80)

static void add_bytes_c(uint8_t *dst, uint8_t *src, ptrdiff_t w)
{
    long i;

    for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) {
        long a = *(long *) (src + i);
        long b = *(long *) (dst + i);
        *(long *) (dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80);
    }
    for (; i < w; i++)
        dst[i + 0] += src[i + 0];
}

static void add_median_pred_c(uint8_t *dst, const uint8_t *src1,
                              const uint8_t *diff, ptrdiff_t w,
                              int *left, int *left_top)
{
    int i;
    uint8_t l, lt;

    l  = *left;
    lt = *left_top;

    for (i = 0; i < w; i++) {
        l      = mid_pred(l, src1[i], (l + src1[i] - lt) & 0xFF) + diff[i];
        lt     = src1[i];
        dst[i] = l;
    }

    *left     = l;
    *left_top = lt;
}

static int add_left_pred_c(uint8_t *dst, const uint8_t *src, ptrdiff_t w,
                           int acc)
{
    int i;

    for (i = 0; i < w - 1; i++) {
        acc   += src[i];
        dst[i] = acc;
        i++;
        acc   += src[i];
        dst[i] = acc;
    }

    for (; i < w; i++) {
        acc   += src[i];
        dst[i] = acc;
    }

    return acc;
}

static int add_left_pred_int16_c(uint16_t *dst, const uint16_t *src, unsigned mask, ptrdiff_t w, unsigned acc){
    int i;

    for(i=0; i<w-1; i++){
        acc+= src[i];
        dst[i]= acc &= mask;
        i++;
        acc+= src[i];
        dst[i]= acc &= mask;
    }

    for(; i<w; i++){
        acc+= src[i];
        dst[i]= acc &= mask;
    }

    return acc;
}

static void add_gradient_pred_c(uint8_t *src, const ptrdiff_t stride, const ptrdiff_t width){
    int A, B, C, i;

    for (i = 0; i < width; i++) {
        A = src[i - stride];
        B = src[i - (stride + 1)];
        C = src[i - 1];
        src[i] = (A - B + C + src[i]) & 0xFF;
    }
}

void ff_llviddsp_init(LLVidDSPContext *c)
{
    c->add_bytes                  = add_bytes_c;
    c->add_median_pred            = add_median_pred_c;
    c->add_left_pred              = add_left_pred_c;

    c->add_left_pred_int16        = add_left_pred_int16_c;
    c->add_gradient_pred          = add_gradient_pred_c;

    if (ARCH_PPC)
        ff_llviddsp_init_ppc(c);
    if (ARCH_X86)
        ff_llviddsp_init_x86(c);
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Lossless video DSP utils
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20			#include "avcodec.h"
21			#include "lossless_videodsp.h"
22			#include "libavcodec/mathops.h"
23
24			// 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size
25			#define pb_7f (~0UL / 255 * 0x7f)
26			#define pb_80 (~0UL / 255 * 0x80)
27
28		29379	static void add_bytes_c(uint8_t dst, uint8_t src, ptrdiff_t w)
29			{
30			long i;
31
32	✓✓	2420131	for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) {
33		2390752	long a = (long ) (src + i);
34		2390752	long b = (long ) (dst + i);
35		2390752	(long ) (dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80);
36			}
37	✗✓	29379	for (; i < w; i++)
38			dst[i + 0] += src[i + 0];
39		29379	}
40
41		47711	static void add_median_pred_c(uint8_t dst, const uint8_t src1,
42			const uint8_t *diff, ptrdiff_t w,
43			int left, int left_top)
44			{
45			int i;
46			uint8_t l, lt;
47
48		47711	l = *left;
49		47711	lt = *left_top;
50
51	✓✓	28817663	for (i = 0; i < w; i++) {
52		28769952	l = mid_pred(l, src1[i], (l + src1[i] - lt) & 0xFF) + diff[i];
53		28769952	lt = src1[i];
54		28769952	dst[i] = l;
55			}
56
57		47711	*left = l;
58		47711	*left_top = lt;
59		47711	}
60
61		363456	static int add_left_pred_c(uint8_t dst, const uint8_t src, ptrdiff_t w,
62			int acc)
63			{
64			int i;
65
66	✓✓	50466544	for (i = 0; i < w - 1; i++) {
67		50103088	acc += src[i];
68		50103088	dst[i] = acc;
69		50103088	i++;
70		50103088	acc += src[i];
71		50103088	dst[i] = acc;
72			}
73
74	✓✓	368972	for (; i < w; i++) {
75		5516	acc += src[i];
76		5516	dst[i] = acc;
77			}
78
79		363456	return acc;
80			}
81
82		359203	static int add_left_pred_int16_c(uint16_t dst, const uint16_t src, unsigned mask, ptrdiff_t w, unsigned acc){
83			int i;
84
85	✓✓	49965687	for(i=0; i<w-1; i++){
86		49606484	acc+= src[i];
87		49606484	dst[i]= acc &= mask;
88		49606484	i++;
89		49606484	acc+= src[i];
90		49606484	dst[i]= acc &= mask;
91			}
92
93	✓✓	364303	for(; i<w; i++){
94		5100	acc+= src[i];
95		5100	dst[i]= acc &= mask;
96			}
97
98		359203	return acc;
99			}
100
101		2697	static void add_gradient_pred_c(uint8_t *src, const ptrdiff_t stride, const ptrdiff_t width){
102			int A, B, C, i;
103
104	✓✓	401985	for (i = 0; i < width; i++) {
105		399288	A = src[i - stride];
106		399288	B = src[i - (stride + 1)];
107		399288	C = src[i - 1];
108		399288	src[i] = (A - B + C + src[i]) & 0xFF;
109			}
110		2697	}
111
112		178	void ff_llviddsp_init(LLVidDSPContext *c)
113			{
114		178	c->add_bytes = add_bytes_c;
115		178	c->add_median_pred = add_median_pred_c;
116		178	c->add_left_pred = add_left_pred_c;
117
118		178	c->add_left_pred_int16 = add_left_pred_int16_c;
119		178	c->add_gradient_pred = add_gradient_pred_c;
120
121			if (ARCH_PPC)
122			ff_llviddsp_init_ppc(c);
123			if (ARCH_X86)
124		178	ff_llviddsp_init_x86(c);
125		178	}