repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Copyright (c) 2012 Mans Rullgard <mans@mansr.com> | |
| 3 | * | |
| 4 | * This file is part of FFmpeg. | |
| 5 | * | |
| 6 | * FFmpeg is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2.1 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * FFmpeg is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with FFmpeg; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | ||
| 21 | #include <stdint.h> | |
| 22 | #include "libavutil/avutil.h" | |
| 23 | ||
| 24 | #undef FUNC | |
| 25 | #undef FSUF | |
| 26 | #undef sample | |
| 27 | #undef sample_type | |
| 28 | #undef OUT | |
| 29 | #undef S | |
| 30 | ||
| 31 | #if SAMPLE_SIZE == 32 | |
| 32 | # define sample_type int32_t | |
| 33 | #else | |
| 34 | # define sample_type int16_t | |
| 35 | #endif | |
| 36 | ||
| 37 | #if PLANAR | |
| 38 | # define FSUF AV_JOIN(SAMPLE_SIZE, p) | |
| 39 | # define sample sample_type * | |
| 40 | # define OUT(n) n | |
| 41 | # define S(s, c, i) (s[c][i]) | |
| 42 | #else | |
| 43 | # define FSUF SAMPLE_SIZE | |
| 44 | # define sample sample_type | |
| 45 | # define OUT(n) n[0] | |
| 46 | # define S(s, c, i) (*s++) | |
| 47 | #endif | |
| 48 | ||
| 49 | #define FUNC(n) AV_JOIN(n ## _, FSUF) | |
| 50 | ||
| 51 | static void FUNC(flac_decorrelate_indep_c)(uint8_t **out, int32_t **in, | |
| 52 | int channels, int len, int shift) | |
| 53 | { | |
| 54 | sample *samples = (sample *) OUT(out); | |
| 55 | int i, j; | |
| 56 | ||
| 57 | for (j = 0; j < len; j++) | |
| 58 | for (i = 0; i < channels; i++) | |
| 59 | S(samples, i, j) = in[i][j] << shift; | |
| 60 | } | |
| 61 | ||
| 62 | static void FUNC(flac_decorrelate_ls_c)(uint8_t **out, int32_t **in, | |
| 63 | int channels, int len, int shift) | |
| 64 | { | |
| 65 | sample *samples = (sample *) OUT(out); | |
| 66 | int i; | |
| 67 | ||
| 68 | for (i = 0; i < len; i++) { | |
| 69 | int a = in[0][i]; | |
| 70 | int b = in[1][i]; | |
| 71 | S(samples, 0, i) = a << shift; | |
| 72 | S(samples, 1, i) = (a - b) << shift; | |
| 73 | } | |
| 74 | } | |
| 75 | ||
| 76 | static void FUNC(flac_decorrelate_rs_c)(uint8_t **out, int32_t **in, | |
| 77 | int channels, int len, int shift) | |
| 78 | { | |
| 79 | sample *samples = (sample *) OUT(out); | |
| 80 | int i; | |
| 81 | ||
| 82 | for (i = 0; i < len; i++) { | |
| 83 | int a = in[0][i]; | |
| 84 | int b = in[1][i]; | |
| 85 | S(samples, 0, i) = (a + b) << shift; | |
| 86 | S(samples, 1, i) = b << shift; | |
| 87 | } | |
| 88 | } | |
| 89 | ||
| 90 | static void FUNC(flac_decorrelate_ms_c)(uint8_t **out, int32_t **in, | |
| 91 | int channels, int len, int shift) | |
| 92 | { | |
| 93 | sample *samples = (sample *) OUT(out); | |
| 94 | int i; | |
| 95 | ||
| 96 | for (i = 0; i < len; i++) { | |
| 97 | int a = in[0][i]; | |
| 98 | int b = in[1][i]; | |
| 99 | a -= b >> 1; | |
| 100 | S(samples, 0, i) = (a + b) << shift; | |
| 101 | S(samples, 1, i) = a << shift; | |
| 102 | } | |
| 103 | } |