aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/lossless_audiodsp.c
blob: 274ab5a8540adbf8c37d1c74ca6b90988fc9d023 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
/*
 * Monkey's Audio lossless audio decoder
 * Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
 *  based upon libdemac from Dave Chapman.
 *
 * 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 "config.h"
#include "libavutil/attributes.h"
#include "lossless_audiodsp.h"

static int32_t scalarproduct_and_madd_int16_c(int16_t *v1, const int16_t *v2,
                                              const int16_t *v3,
                                              int order, int mul)
{
    unsigned res = 0;

    do {
        res   += *v1 * *v2++;
        *v1++ += mul * *v3++;
        res   += *v1 * *v2++;
        *v1++ += mul * *v3++;
    } while (order-=2);
    return res;
}

static int32_t scalarproduct_and_madd_int32_c(int16_t *v1, const int32_t *v2,
                                              const int16_t *v3,
                                              int order, int mul)
{
    int res = 0;

    do {
        res   += *v1 * (uint32_t)*v2++;
        *v1++ += mul * *v3++;
        res   += *v1 * (uint32_t)*v2++;
        *v1++ += mul * *v3++;
    } while (order-=2);
    return res;
}

av_cold void ff_llauddsp_init(LLAudDSPContext *c)
{
    c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_c;
    c->scalarproduct_and_madd_int32 = scalarproduct_and_madd_int32_c;

    if (ARCH_ARM)
        ff_llauddsp_init_arm(c);
    if (ARCH_PPC)
        ff_llauddsp_init_ppc(c);
    if (ARCH_X86)
        ff_llauddsp_init_x86(c);
}