1 /*
2 * Monkey's Audio lossless audio decoder
3 * Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
4 * based upon libdemac from Dave Chapman.
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "config.h"
24 #include "libavutil/attributes.h"
25 #include "lossless_audiodsp.h"
26
scalarproduct_and_madd_int16_c(int16_t * v1,const int16_t * v2,const int16_t * v3,int order,int mul)27 static int32_t scalarproduct_and_madd_int16_c(int16_t *v1, const int16_t *v2,
28 const int16_t *v3,
29 int order, int mul)
30 {
31 unsigned res = 0;
32
33 do {
34 res += *v1 * *v2++;
35 *v1++ += mul * *v3++;
36 res += *v1 * *v2++;
37 *v1++ += mul * *v3++;
38 } while (order-=2);
39 return res;
40 }
41
scalarproduct_and_madd_int32_c(int16_t * v1,const int32_t * v2,const int16_t * v3,int order,int mul)42 static int32_t scalarproduct_and_madd_int32_c(int16_t *v1, const int32_t *v2,
43 const int16_t *v3,
44 int order, int mul)
45 {
46 int res = 0;
47
48 do {
49 res += *v1 * (uint32_t)*v2++;
50 *v1++ += mul * *v3++;
51 res += *v1 * (uint32_t)*v2++;
52 *v1++ += mul * *v3++;
53 } while (order-=2);
54 return res;
55 }
56
ff_llauddsp_init(LLAudDSPContext * c)57 av_cold void ff_llauddsp_init(LLAudDSPContext *c)
58 {
59 c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_c;
60 c->scalarproduct_and_madd_int32 = scalarproduct_and_madd_int32_c;
61
62 #if ARCH_ARM
63 ff_llauddsp_init_arm(c);
64 #elif ARCH_PPC
65 ff_llauddsp_init_ppc(c);
66 #elif ARCH_X86
67 ff_llauddsp_init_x86(c);
68 #endif
69 }
70