GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/mpc.c Lines: 34 34 100.0 %
Date: 2020-11-28 20:53:16 Branches: 20 20 100.0 %

Line Branch Exec Source
1
/*
2
 * Musepack decoder core
3
 * Copyright (c) 2006 Konstantin Shishkov
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
 * Musepack decoder core
25
 * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
26
 * divided into 32 subbands.
27
 */
28
29
#include "libavutil/attributes.h"
30
#include "avcodec.h"
31
#include "mpegaudiodsp.h"
32
#include "mpegaudio.h"
33
34
#include "mpc.h"
35
#include "mpcdata.h"
36
37
/**
38
 * Process decoded Musepack data and produce PCM
39
 */
40
912
static void mpc_synth(MPCContext *c, int16_t **out, int channels)
41
{
42
912
    int dither_state = 0;
43
    int i, ch;
44
45
2736
    for(ch = 0;  ch < channels; ch++){
46
67488
        for(i = 0; i < SAMPLES_PER_BAND; i++) {
47
65664
            ff_mpa_synth_filter_fixed(&c->mpadsp,
48
65664
                                c->synth_buf[ch], &(c->synth_buf_offset[ch]),
49
                                ff_mpa_synth_window_fixed, &dither_state,
50
65664
                                out[ch] + 32 * i, 1,
51
65664
                                c->sb_samples[ch][i]);
52
        }
53
    }
54
912
}
55
56
912
void ff_mpc_dequantize_and_synth(MPCContext * c, int maxband, int16_t **out,
57
                                 int channels)
58
{
59
    int i, j, ch;
60
912
    Band *bands = c->bands;
61
    int off;
62
    float mul;
63
64
    /* dequantize */
65
912
    memset(c->sb_samples, 0, sizeof(c->sb_samples));
66
912
    off = 0;
67
21740
    for(i = 0; i <= maxband; i++, off += SAMPLES_PER_BAND){
68
62484
        for(ch = 0; ch < 2; ch++){
69
41656
            if(bands[i].res[ch]){
70
36564
                j = 0;
71
36564
                mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][0] & 0xFF];
72
475332
                for(; j < 12; j++)
73
438768
                    c->sb_samples[ch][j][i] = av_clipf(mul * c->Q[ch][j + off], INT32_MIN, INT32_MAX);
74
36564
                mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][1] & 0xFF];
75
475332
                for(; j < 24; j++)
76
438768
                    c->sb_samples[ch][j][i] = av_clipf(mul * c->Q[ch][j + off], INT32_MIN, INT32_MAX);
77
36564
                mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][2] & 0xFF];
78
475332
                for(; j < 36; j++)
79
438768
                    c->sb_samples[ch][j][i] = av_clipf(mul * c->Q[ch][j + off], INT32_MIN, INT32_MAX);
80
            }
81
        }
82
20828
        if(bands[i].msf){
83
            unsigned t1, t2;
84
453250
            for(j = 0; j < SAMPLES_PER_BAND; j++){
85
441000
                t1 = c->sb_samples[0][j][i];
86
441000
                t2 = c->sb_samples[1][j][i];
87
441000
                c->sb_samples[0][j][i] = t1 + t2;
88
441000
                c->sb_samples[1][j][i] = t1 - t2;
89
            }
90
        }
91
    }
92
93
912
    mpc_synth(c, out, channels);
94
912
}