/* * Copyright (c) 2012 Mans Rullgard <mans@mansr.com> * * 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 <stdint.h> #include "libavutil/avutil.h" #undef FUNC #undef FSUF #undef sample #undef sample_type #undef OUT #undef S #if SAMPLE_SIZE == 32 # define sample_type int32_t #else # define sample_type int16_t #endif #if PLANAR # define FSUF AV_JOIN(SAMPLE_SIZE, p) # define sample sample_type * # define OUT(n) n # define S(s, c, i) (s[c][i]) #else # define FSUF SAMPLE_SIZE # define sample sample_type # define OUT(n) n[0] # define S(s, c, i) (*s++) #endif #define FUNC(n) AV_JOIN(n ## _, FSUF) static void FUNC(flac_decorrelate_indep_c)(uint8_t **out, int32_t **in, int channels, int len, int shift) { sample *samples = (sample *) OUT(out); int i, j; for (j = 0; j < len; j++) for (i = 0; i < channels; i++) S(samples, i, j) = (int)((unsigned)in[i][j] << shift); } static void FUNC(flac_decorrelate_ls_c)(uint8_t **out, int32_t **in, int channels, int len, int shift) { sample *samples = (sample *) OUT(out); int i; for (i = 0; i < len; i++) { int a = in[0][i]; int b = in[1][i]; S(samples, 0, i) = a << shift; S(samples, 1, i) = (a - b) << shift; } } static void FUNC(flac_decorrelate_rs_c)(uint8_t **out, int32_t **in, int channels, int len, int shift) { sample *samples = (sample *) OUT(out); int i; for (i = 0; i < len; i++) { int a = in[0][i]; int b = in[1][i]; S(samples, 0, i) = (a + b) << shift; S(samples, 1, i) = b << shift; } } static void FUNC(flac_decorrelate_ms_c)(uint8_t **out, int32_t **in, int channels, int len, int shift) { sample *samples = (sample *) OUT(out); int i; for (i = 0; i < len; i++) { int a = in[0][i]; int b = in[1][i]; a -= b >> 1; S(samples, 0, i) = (a + b) << shift; S(samples, 1, i) = a << shift; } }