blob: 3a9f9b20bb27a1f7d14d5167df38608b1235ac68
| 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 "avcodec.h" |
| 24 | #include "lossless_audiodsp.h" |
| 25 | |
| 26 | static int32_t scalarproduct_and_madd_int16_c(int16_t *v1, const int16_t *v2, |
| 27 | const int16_t *v3, |
| 28 | int order, int mul) |
| 29 | { |
| 30 | int res = 0; |
| 31 | |
| 32 | do { |
| 33 | res += *v1 * *v2++; |
| 34 | *v1++ += mul * *v3++; |
| 35 | res += *v1 * *v2++; |
| 36 | *v1++ += mul * *v3++; |
| 37 | } while (order-=2); |
| 38 | return res; |
| 39 | } |
| 40 | |
| 41 | static int32_t scalarproduct_and_madd_int32_c(int16_t *v1, const int32_t *v2, |
| 42 | const int16_t *v3, |
| 43 | int order, int mul) |
| 44 | { |
| 45 | int res = 0; |
| 46 | |
| 47 | do { |
| 48 | res += *v1 * (uint32_t)*v2++; |
| 49 | *v1++ += mul * *v3++; |
| 50 | res += *v1 * (uint32_t)*v2++; |
| 51 | *v1++ += mul * *v3++; |
| 52 | } while (order-=2); |
| 53 | return res; |
| 54 | } |
| 55 | |
| 56 | av_cold void ff_llauddsp_init(LLAudDSPContext *c) |
| 57 | { |
| 58 | c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_c; |
| 59 | c->scalarproduct_and_madd_int32 = scalarproduct_and_madd_int32_c; |
| 60 | |
| 61 | if (ARCH_ARM) |
| 62 | ff_llauddsp_init_arm(c); |
| 63 | if (ARCH_PPC) |
| 64 | ff_llauddsp_init_ppc(c); |
| 65 | if (ARCH_X86) |
| 66 | ff_llauddsp_init_x86(c); |
| 67 | } |
| 68 |