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libavcodec: Implementation of AAC_fixed_decoder (LC-module) [2/4]

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Add fixed point implementation of functions for generating tables

Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Jovan Zelincevic
2015-06-30 11:53:04 +02:00
committed by Michael Niedermayer
parent f497a9e84e
commit 08be74ac81
16 changed files with 680 additions and 35 deletions
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31
libavcodec/sinewin_tablegen.h
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@@ -41,26 +41,41 @@ SINETABLE(2048);
SINETABLE(4096);
SINETABLE(8192);
#else
#if USE_FIXED
#include "libavcodec/sinewin_fixed_tables.h"
#else
#include "libavcodec/sinewin_tables.h"
#endif
#endif
SINETABLE_CONST float * const ff_sine_windows[] = {
#if USE_FIXED
#define SINEWIN_SUFFIX(a) a ## _fixed
#define INTFLOAT int
#define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
#else
#define SINEWIN_SUFFIX(a) a
#define INTFLOAT float
#define SIN_FIX(a) a
#endif
SINETABLE_CONST INTFLOAT * const SINEWIN_SUFFIX(ff_sine_windows)[] = {
NULL, NULL, NULL, NULL, NULL, // unused
ff_sine_32 , ff_sine_64 ,
ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096, ff_sine_8192
SINEWIN_SUFFIX(ff_sine_32) , SINEWIN_SUFFIX(ff_sine_64), SINEWIN_SUFFIX(ff_sine_128),
SINEWIN_SUFFIX(ff_sine_256), SINEWIN_SUFFIX(ff_sine_512), SINEWIN_SUFFIX(ff_sine_1024),
SINEWIN_SUFFIX(ff_sine_2048), SINEWIN_SUFFIX(ff_sine_4096), SINEWIN_SUFFIX(ff_sine_8192)
};
// Generate a sine window.
av_cold void ff_sine_window_init(float *window, int n) {
av_cold void SINEWIN_SUFFIX(ff_sine_window_init)(INTFLOAT *window, int n) {
int i;
for(i = 0; i < n; i++)
window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n)));
window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n))));
}
av_cold void ff_init_ff_sine_windows(int index) {
assert(index >= 0 && index < FF_ARRAY_ELEMS(ff_sine_windows));
av_cold void SINEWIN_SUFFIX(ff_init_ff_sine_windows)(int index) {
assert(index >= 0 && index < FF_ARRAY_ELEMS(SINEWIN_SUFFIX(ff_sine_windows)));
#if !CONFIG_HARDCODED_TABLES
ff_sine_window_init(ff_sine_windows[index], 1 << index);
SINEWIN_SUFFIX(ff_sine_window_init)(SINEWIN_SUFFIX(ff_sine_windows)[index], 1 << index);
#endif
}