#include "dsputil.h"
/* cos(2*pi*x/n) for 0<=x<=n/4, followed by its reverse */
-DECLARE_ALIGNED_16(FFTSample, ff_cos_16[8]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_32[16]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_64[32]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_128[64]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_256[128]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_512[256]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_1024[512]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_2048[1024]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_4096[2048]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_8192[4096]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_16384[8192]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_32768[16384]);
-DECLARE_ALIGNED_16(FFTSample, ff_cos_65536[32768]);
-FFTSample * const ff_cos_tabs[] = {
+#if !CONFIG_HARDCODED_TABLES
+COSTABLE(16);
+COSTABLE(32);
+COSTABLE(64);
+COSTABLE(128);
+COSTABLE(256);
+COSTABLE(512);
+COSTABLE(1024);
+COSTABLE(2048);
+COSTABLE(4096);
+COSTABLE(8192);
+COSTABLE(16384);
+COSTABLE(32768);
+COSTABLE(65536);
+#endif
+COSTABLE_CONST FFTSample * const ff_cos_tabs[] = {
+ NULL, NULL, NULL, NULL,
ff_cos_16, ff_cos_32, ff_cos_64, ff_cos_128, ff_cos_256, ff_cos_512, ff_cos_1024,
ff_cos_2048, ff_cos_4096, ff_cos_8192, ff_cos_16384, ff_cos_32768, ff_cos_65536,
};
else return split_radix_permutation(i, m, inverse)*4 - 1;
}
+av_cold void ff_init_ff_cos_tabs(int index)
+{
+#if !CONFIG_HARDCODED_TABLES
+ int i;
+ int m = 1<<index;
+ double freq = 2*M_PI/m;
+ FFTSample *tab = ff_cos_tabs[index];
+ for(i=0; i<=m/4; i++)
+ tab[i] = cos(i*freq);
+ for(i=1; i<m/4; i++)
+ tab[m/2-i] = tab[i];
+#endif
+}
+
av_cold int ff_fft_init(FFTContext *s, int nbits, int inverse)
{
int i, j, m, n;
s->fft_permute = ff_fft_permute_c;
s->fft_calc = ff_fft_calc_c;
+#if CONFIG_MDCT
s->imdct_calc = ff_imdct_calc_c;
s->imdct_half = ff_imdct_half_c;
s->mdct_calc = ff_mdct_calc_c;
+#endif
s->exptab1 = NULL;
s->split_radix = 1;
if (s->split_radix) {
for(j=4; j<=nbits; j++) {
- int m = 1<<j;
- double freq = 2*M_PI/m;
- FFTSample *tab = ff_cos_tabs[j-4];
- for(i=0; i<=m/4; i++)
- tab[i] = cos(i*freq);
- for(i=1; i<m/4; i++)
- tab[m/2-i] = tab[i];
+ ff_init_ff_cos_tabs(j);
}
for(i=0; i<n; i++)
s->revtab[-split_radix_permutation(i, n, s->inverse) & (n-1)] = i;
DECL_FFT(32768,16384,8192)
DECL_FFT(65536,32768,16384)
-static void (*fft_dispatch[])(FFTComplex*) = {
+static void (* const fft_dispatch[])(FFTComplex*) = {
fft4, fft8, fft16, fft32, fft64, fft128, fft256, fft512, fft1024,
fft2048, fft4096, fft8192, fft16384, fft32768, fft65536,
};