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| author | Mans Rullgard <mans@mansr.com> | 2011-03-26 15:20:30 +0000 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-03-31 12:01:27 +0100 |
| commit | 7087ce08c84dd20404ba258096530cc547d25c15 (patch) | |
| tree | f4e9433089df1f8849d43c9a5f3c27d533a6b212 /libavcodec/fft.h | |
| parent | 2f97b12eaf8ada30b3884604d66dbdf51e727b67 (diff) | |
| download | ffmpeg-7087ce08c84dd20404ba258096530cc547d25c15.tar.gz | |
Fixed-point FFT and MDCT
Diffstat (limited to 'libavcodec/fft.h')
| -rw-r--r-- | libavcodec/fft.h | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/libavcodec/fft.h b/libavcodec/fft.h index 36be9962ad..2f13e5fdb3 100644 --- a/libavcodec/fft.h +++ b/libavcodec/fft.h @@ -22,11 +22,37 @@ #ifndef AVCODEC_FFT_H #define AVCODEC_FFT_H +#ifndef CONFIG_FFT_FLOAT +#define CONFIG_FFT_FLOAT 1 +#endif + #include <stdint.h> #include "config.h" #include "libavutil/mem.h" + +#if CONFIG_FFT_FLOAT + #include "avfft.h" +#define FFT_NAME(x) x + +typedef float FFTDouble; + +#else + +#define FFT_NAME(x) x ## _fixed + +typedef int16_t FFTSample; +typedef int FFTDouble; + +typedef struct FFTComplex { + int16_t re, im; +} FFTComplex; + +typedef struct FFTContext FFTContext; + +#endif /* CONFIG_FFT_FLOAT */ + /* FFT computation */ struct FFTContext { @@ -66,7 +92,7 @@ struct FFTContext { #endif #define COSTABLE(size) \ - COSTABLE_CONST DECLARE_ALIGNED(16, FFTSample, ff_cos_##size)[size/2] + COSTABLE_CONST DECLARE_ALIGNED(16, FFTSample, FFT_NAME(ff_cos_##size))[size/2] extern COSTABLE(16); extern COSTABLE(32); @@ -81,7 +107,9 @@ extern COSTABLE(8192); extern COSTABLE(16384); extern COSTABLE(32768); extern COSTABLE(65536); -extern COSTABLE_CONST FFTSample* const ff_cos_tabs[17]; +extern COSTABLE_CONST FFTSample* const FFT_NAME(ff_cos_tabs)[17]; + +#define ff_init_ff_cos_tabs FFT_NAME(ff_init_ff_cos_tabs) /** * Initialize the cosine table in ff_cos_tabs[index] @@ -89,6 +117,9 @@ extern COSTABLE_CONST FFTSample* const ff_cos_tabs[17]; */ void ff_init_ff_cos_tabs(int index); +#define ff_fft_init FFT_NAME(ff_fft_init) +#define ff_fft_end FFT_NAME(ff_fft_end) + /** * Set up a complex FFT. * @param nbits log2 of the length of the input array @@ -102,10 +133,10 @@ void ff_fft_init_arm(FFTContext *s); void ff_fft_end(FFTContext *s); +#define ff_mdct_init FFT_NAME(ff_mdct_init) +#define ff_mdct_end FFT_NAME(ff_mdct_end) + int ff_mdct_init(FFTContext *s, int nbits, int inverse, double scale); -void ff_imdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input); -void ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input); -void ff_mdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input); void ff_mdct_end(FFTContext *s); #endif /* AVCODEC_FFT_H */ |