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/*
* 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 "libavutil/attributes.h"
#include "libavutil/mem.h"
#include "avfft.h"
#include "fft.h"
#include "rdft.h"
#include "dct.h"
/* FFT */
FFTContext *av_fft_init(int nbits, int inverse)
{
FFTContext *s = av_mallocz(sizeof(*s));
if (s && ff_fft_init(s, nbits, inverse))
av_freep(&s);
return s;
}
void av_fft_permute(FFTContext *s, FFTComplex *z)
{
s->fft_permute(s, z);
}
void av_fft_calc(FFTContext *s, FFTComplex *z)
{
s->fft_calc(s, z);
}
av_cold void av_fft_end(FFTContext *s)
{
if (s) {
ff_fft_end(s);
av_free(s);
}
}
#if CONFIG_MDCT
FFTContext *av_mdct_init(int nbits, int inverse, double scale)
{
FFTContext *s = av_malloc(sizeof(*s));
if (s && ff_mdct_init(s, nbits, inverse, scale))
av_freep(&s);
return s;
}
void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
{
s->imdct_calc(s, output, input);
}
void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input)
{
s->imdct_half(s, output, input);
}
void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
{
s->mdct_calc(s, output, input);
}
av_cold void av_mdct_end(FFTContext *s)
{
if (s) {
ff_mdct_end(s);
av_free(s);
}
}
#endif /* CONFIG_MDCT */
#if CONFIG_RDFT
RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans)
{
RDFTContext *s = av_malloc(sizeof(*s));
if (s && ff_rdft_init(s, nbits, trans))
av_freep(&s);
return s;
}
void av_rdft_calc(RDFTContext *s, FFTSample *data)
{
s->rdft_calc(s, data);
}
av_cold void av_rdft_end(RDFTContext *s)
{
if (s) {
ff_rdft_end(s);
av_free(s);
}
}
#endif /* CONFIG_RDFT */
#if CONFIG_DCT
DCTContext *av_dct_init(int nbits, enum DCTTransformType inverse)
{
DCTContext *s = av_malloc(sizeof(*s));
if (s && ff_dct_init(s, nbits, inverse))
av_freep(&s);
return s;
}
void av_dct_calc(DCTContext *s, FFTSample *data)
{
s->dct_calc(s, data);
}
av_cold void av_dct_end(DCTContext *s)
{
if (s) {
ff_dct_end(s);
av_free(s);
}
}
#ifdef TEST
int main(int argc, char **argv)
{
int i;
#define LEN 1024
FFTSample *ref = av_malloc_array(LEN, sizeof(*ref));
FFTSample *data = av_malloc_array(LEN, sizeof(*data));
RDFTContext *rdft_context = av_rdft_init(10, DFT_R2C);
RDFTContext *irdft_context = av_rdft_init(10, IDFT_C2R);
if (!ref || !data || !rdft_context || !irdft_context)
return 2;
for (i=0; i<LEN; i++) {
ref[i] = data[i] = i*456 + 123 + i*i;
}
av_rdft_calc(rdft_context, data);
av_rdft_calc(irdft_context, data);
for (i=0; i<LEN; i++) {
if (fabs(ref[i] - data[i]/LEN*2) > 1) {
fprintf(stderr, "Failed at %d (%f %f)\n", i, ref[i], data[i]/LEN*2);
return 1;
}
}
av_rdft_end(rdft_context);
av_rdft_end(irdft_context);
av_free(data);
av_free(ref);
return 0;
}
#endif
#endif /* CONFIG_DCT */
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