FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/atrac.c	Lines:	62	62	100.0 %
Date:	2021-04-18 10:33:33	Branches:	30	30	100.0 %


/*
 * common functions for the ATRAC family of decoders
 *
 * Copyright (c) 2006-2013 Maxim Poliakovski
 * Copyright (c) 2006-2008 Benjamin Larsson
 *
 * 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
 */

#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>

#include "libavutil/thread.h"

#include "avcodec.h"
#include "atrac.h"

float ff_atrac_sf_table[64];
static float qmf_window[48];

static const float qmf_48tap_half[24] = {
   -0.00001461907, -0.00009205479,-0.000056157569,0.00030117269,
    0.0002422519,  -0.00085293897,-0.0005205574,  0.0020340169,
    0.00078333891, -0.0042153862, -0.00075614988, 0.0078402944,
   -0.000061169922,-0.01344162,    0.0024626821,  0.021736089,
   -0.007801671,   -0.034090221,   0.01880949,    0.054326009,
   -0.043596379,   -0.099384367,   0.13207909,    0.46424159
};

static av_cold void atrac_generate_tables(void)
{
    /* Generate scale factors */
    for (int i = 0; i < 64; i++)
        ff_atrac_sf_table[i] = pow(2.0, (i - 15) / 3.0);

    /* Generate the QMF window. */
    for (int i = 0; i < 24; i++) {
        float s = qmf_48tap_half[i] * 2.0;
        qmf_window[i] = qmf_window[47 - i] = s;
    }
}

av_cold void ff_atrac_generate_tables(void)
{
    static AVOnce init_static_once = AV_ONCE_INIT;
    ff_thread_once(&init_static_once, atrac_generate_tables);
}

av_cold void ff_atrac_init_gain_compensation(AtracGCContext *gctx, int id2exp_offset,
                                             int loc_scale)
{
    int i;

    gctx->loc_scale     = loc_scale;
    gctx->loc_size      = 1 << loc_scale;
    gctx->id2exp_offset = id2exp_offset;

    /* Generate gain level table. */
    for (i = 0; i < 16; i++)
        gctx->gain_tab1[i] = powf(2.0, id2exp_offset - i);

    /* Generate gain interpolation table. */
    for (i = -15; i < 16; i++)
        gctx->gain_tab2[i + 15] = powf(2.0, -1.0f / gctx->loc_size * i);
}

void ff_atrac_gain_compensation(AtracGCContext *gctx, float *in, float *prev,
                                AtracGainInfo *gc_now, AtracGainInfo *gc_next,
                                int num_samples, float *out)
{
    float lev, gc_scale, gain_inc;
    int i, pos, lastpos;

    gc_scale = gc_next->num_points ? gctx->gain_tab1[gc_next->lev_code[0]]
                                   : 1.0f;

    if (!gc_now->num_points) {
        for (pos = 0; pos < num_samples; pos++)
            out[pos] = in[pos] * gc_scale + prev[pos];
    } else {
        pos = 0;

        for (i = 0; i < gc_now->num_points; i++) {
            lastpos = gc_now->loc_code[i] << gctx->loc_scale;

            lev = gctx->gain_tab1[gc_now->lev_code[i]];
            gain_inc = gctx->gain_tab2[(i + 1 < gc_now->num_points ? gc_now->lev_code[i + 1]
                                                                   : gctx->id2exp_offset) -
                                       gc_now->lev_code[i] + 15];

            /* apply constant gain level and overlap */
            for (; pos < lastpos; pos++)
                out[pos] = (in[pos] * gc_scale + prev[pos]) * lev;

            /* interpolate between two different gain levels */
            for (; pos < lastpos + gctx->loc_size; pos++) {
                out[pos] = (in[pos] * gc_scale + prev[pos]) * lev;
                lev *= gain_inc;
            }
        }

        for (; pos < num_samples; pos++)
            out[pos] = in[pos] * gc_scale + prev[pos];
    }

    /* copy the overlapping part into the delay buffer */
    memcpy(prev, &in[num_samples], num_samples * sizeof(float));
}

void ff_atrac_iqmf(float *inlo, float *inhi, unsigned int nIn, float *pOut,
                   float *delayBuf, float *temp)
{
    int   i, j;
    float   *p1, *p3;

    memcpy(temp, delayBuf, 46*sizeof(float));

    p3 = temp + 46;

    /* loop1 */
    for(i=0; i<nIn; i+=2){
        p3[2*i+0] = inlo[i  ] + inhi[i  ];
        p3[2*i+1] = inlo[i  ] - inhi[i  ];
        p3[2*i+2] = inlo[i+1] + inhi[i+1];
        p3[2*i+3] = inlo[i+1] - inhi[i+1];
    }

    /* loop2 */
    p1 = temp;
    for (j = nIn; j != 0; j--) {
        float s1 = 0.0;
        float s2 = 0.0;

        for (i = 0; i < 48; i += 2) {
            s1 += p1[i] * qmf_window[i];
            s2 += p1[i+1] * qmf_window[i+1];
        }

        pOut[0] = s2;
        pOut[1] = s1;

        p1 += 2;
        pOut += 2;
    }

    /* Update the delay buffer. */
    memcpy(delayBuf, temp + nIn*2, 46*sizeof(float));
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* common functions for the ATRAC family of decoders
3			*
4			* Copyright (c) 2006-2013 Maxim Poliakovski
5			* Copyright (c) 2006-2008 Benjamin Larsson
6			*
7			* This file is part of FFmpeg.
8			*
9			* FFmpeg is free software; you can redistribute it and/or
10			* modify it under the terms of the GNU Lesser General Public
11			* License as published by the Free Software Foundation; either
12			* version 2.1 of the License, or (at your option) any later version.
13			*
14			* FFmpeg is distributed in the hope that it will be useful,
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17			* Lesser General Public License for more details.
18			*
19			* You should have received a copy of the GNU Lesser General Public
20			* License along with FFmpeg; if not, write to the Free Software
21			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22			*/
23
24			/**
25			* @file
26			*/
27
28			#include <math.h>
29			#include <stddef.h>
30			#include <stdio.h>
31			#include <string.h>
32
33			#include "libavutil/thread.h"
34
35			#include "avcodec.h"
36			#include "atrac.h"
37
38			float ff_atrac_sf_table[64];
39			static float qmf_window[48];
40
41			static const float qmf_48tap_half[24] = {
42			-0.00001461907, -0.00009205479,-0.000056157569,0.00030117269,
43			0.0002422519, -0.00085293897,-0.0005205574, 0.0020340169,
44			0.00078333891, -0.0042153862, -0.00075614988, 0.0078402944,
45			-0.000061169922,-0.01344162, 0.0024626821, 0.021736089,
46			-0.007801671, -0.034090221, 0.01880949, 0.054326009,
47			-0.043596379, -0.099384367, 0.13207909, 0.46424159
48			};
49
50		7	static av_cold void atrac_generate_tables(void)
51			{
52			/* Generate scale factors */
53	✓✓	455	for (int i = 0; i < 64; i++)
54		448	ff_atrac_sf_table[i] = pow(2.0, (i - 15) / 3.0);
55
56			/* Generate the QMF window. */
57	✓✓	175	for (int i = 0; i < 24; i++) {
58		168	float s = qmf_48tap_half[i] * 2.0;
59		168	qmf_window[i] = qmf_window[47 - i] = s;
60			}
61		7	}
62
63		9	av_cold void ff_atrac_generate_tables(void)
64			{
65			static AVOnce init_static_once = AV_ONCE_INIT;
66		9	ff_thread_once(&init_static_once, atrac_generate_tables);
67		9	}
68
69		11	av_cold void ff_atrac_init_gain_compensation(AtracGCContext *gctx, int id2exp_offset,
70			int loc_scale)
71			{
72			int i;
73
74		11	gctx->loc_scale = loc_scale;
75		11	gctx->loc_size = 1 << loc_scale;
76		11	gctx->id2exp_offset = id2exp_offset;
77
78			/* Generate gain level table. */
79	✓✓	187	for (i = 0; i < 16; i++)
80		176	gctx->gain_tab1[i] = powf(2.0, id2exp_offset - i);
81
82			/* Generate gain interpolation table. */
83	✓✓	352	for (i = -15; i < 16; i++)
84		341	gctx->gain_tab2[i + 15] = powf(2.0, -1.0f / gctx->loc_size * i);
85		11	}
86
87		26104	void ff_atrac_gain_compensation(AtracGCContext gctx, float in, float *prev,
88			AtracGainInfo gc_now, AtracGainInfo gc_next,
89			int num_samples, float *out)
90			{
91			float lev, gc_scale, gain_inc;
92			int i, pos, lastpos;
93
94		53768	gc_scale = gc_next->num_points ? gctx->gain_tab1[gc_next->lev_code[0]]
95	✓✓	26104	: 1.0f;
96
97	✓✓	26104	if (!gc_now->num_points) {
98	✓✓	3659489	for (pos = 0; pos < num_samples; pos++)
99		3634944	out[pos] = in[pos] * gc_scale + prev[pos];
100			} else {
101		1559	pos = 0;
102
103	✓✓	3564	for (i = 0; i < gc_now->num_points; i++) {
104		2005	lastpos = gc_now->loc_code[i] << gctx->loc_scale;
105
106		2005	lev = gctx->gain_tab1[gc_now->lev_code[i]];
107		4456	gain_inc = gctx->gain_tab2[(i + 1 < gc_now->num_points ? gc_now->lev_code[i + 1]
108	✓✓	2005	: gctx->id2exp_offset) -
109		2005	gc_now->lev_code[i] + 15];
110
111			/* apply constant gain level and overlap */
112	✓✓	123893	for (; pos < lastpos; pos++)
113		121888	out[pos] = (in[pos] * gc_scale + prev[pos]) * lev;
114
115			/* interpolate between two different gain levels */
116	✓✓	13521	for (; pos < lastpos + gctx->loc_size; pos++) {
117		11516	out[pos] = (in[pos] * gc_scale + prev[pos]) * lev;
118		11516	lev *= gain_inc;
119			}
120			}
121
122	✓✓	141819	for (; pos < num_samples; pos++)
123		140260	out[pos] = in[pos] * gc_scale + prev[pos];
124			}
125
126			/* copy the overlapping part into the delay buffer */
127		26104	memcpy(prev, &in[num_samples], num_samples * sizeof(float));
128		26104	}
129
130		8056	void ff_atrac_iqmf(float inlo, float inhi, unsigned int nIn, float *pOut,
131			float delayBuf, float temp)
132			{
133			int i, j;
134			float p1, p3;
135
136		8056	memcpy(temp, delayBuf, 46*sizeof(float));
137
138		8056	p3 = temp + 46;
139
140			/* loop1 */
141	✓✓	1029624	for(i=0; i<nIn; i+=2){
142		1021568	p3[2*i+0] = inlo[i ] + inhi[i ];
143		1021568	p3[2*i+1] = inlo[i ] - inhi[i ];
144		1021568	p3[2*i+2] = inlo[i+1] + inhi[i+1];
145		1021568	p3[2*i+3] = inlo[i+1] - inhi[i+1];
146			}
147
148			/* loop2 */
149		8056	p1 = temp;
150	✓✓	2051192	for (j = nIn; j != 0; j--) {
151		2043136	float s1 = 0.0;
152		2043136	float s2 = 0.0;
153
154	✓✓	51078400	for (i = 0; i < 48; i += 2) {
155		49035264	s1 += p1[i] * qmf_window[i];
156		49035264	s2 += p1[i+1] * qmf_window[i+1];
157			}
158
159		2043136	pOut[0] = s2;
160		2043136	pOut[1] = s1;
161
162		2043136	p1 += 2;
163		2043136	pOut += 2;
164			}
165
166			/* Update the delay buffer. */
167		8056	memcpy(delayBuf, temp + nIn2, 46sizeof(float));
168		8056	}