* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_FFT_H
#define AVCODEC_FFT_H
+#ifndef FFT_FLOAT
+#define FFT_FLOAT 1
+#endif
+
#include <stdint.h>
#include "config.h"
#include "libavutil/mem.h"
+
+#if 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 /* FFT_FLOAT */
+
+typedef struct FFTDComplex {
+ FFTDouble re, im;
+} FFTDComplex;
+
/* FFT computation */
+enum fft_permutation_type {
+ FF_FFT_PERM_DEFAULT,
+ FF_FFT_PERM_SWAP_LSBS,
+ FF_FFT_PERM_AVX,
+};
+
+enum mdct_permutation_type {
+ FF_MDCT_PERM_NONE,
+ FF_MDCT_PERM_INTERLEAVE,
+};
+
struct FFTContext {
int nbits;
int inverse;
uint16_t *revtab;
- FFTComplex *exptab;
- FFTComplex *exptab1; /* only used by SSE code */
FFTComplex *tmp_buf;
int mdct_size; /* size of MDCT (i.e. number of input data * 2) */
int mdct_bits; /* n = 2^nbits */
/* pre/post rotation tables */
FFTSample *tcos;
FFTSample *tsin;
+ /**
+ * Do the permutation needed BEFORE calling fft_calc().
+ */
void (*fft_permute)(struct FFTContext *s, FFTComplex *z);
+ /**
+ * Do a complex FFT with the parameters defined in ff_fft_init(). The
+ * input data must be permuted before. No 1.0/sqrt(n) normalization is done.
+ */
void (*fft_calc)(struct FFTContext *s, FFTComplex *z);
void (*imdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input);
void (*imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input);
void (*mdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input);
- int split_radix;
- int permutation;
-#define FF_MDCT_PERM_NONE 0
-#define FF_MDCT_PERM_INTERLEAVE 1
+ void (*mdct_calcw)(struct FFTContext *s, FFTDouble *output, const FFTSample *input);
+ enum fft_permutation_type fft_permutation;
+ enum mdct_permutation_type mdct_permutation;
};
#if CONFIG_HARDCODED_TABLES
#define COSTABLE_CONST const
-#define SINTABLE_CONST const
-#define SINETABLE_CONST const
#else
#define COSTABLE_CONST
-#define SINTABLE_CONST
-#define SINETABLE_CONST
#endif
#define COSTABLE(size) \
- COSTABLE_CONST DECLARE_ALIGNED(16, FFTSample, ff_cos_##size)[size/2]
-#define SINTABLE(size) \
- SINTABLE_CONST DECLARE_ALIGNED(16, FFTSample, ff_sin_##size)[size/2]
-#define SINETABLE(size) \
- SINETABLE_CONST DECLARE_ALIGNED(16, float, ff_sine_##size)[size]
+ COSTABLE_CONST DECLARE_ALIGNED(32, FFTSample, FFT_NAME(ff_cos_##size))[size/2]
+
extern COSTABLE(16);
extern COSTABLE(32);
extern COSTABLE(64);
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]
- * \param index index in ff_cos_tabs array of the table to initialize
+ * @param index index in ff_cos_tabs array of the table to initialize
*/
void ff_init_ff_cos_tabs(int index);
-extern SINTABLE(16);
-extern SINTABLE(32);
-extern SINTABLE(64);
-extern SINTABLE(128);
-extern SINTABLE(256);
-extern SINTABLE(512);
-extern SINTABLE(1024);
-extern SINTABLE(2048);
-extern SINTABLE(4096);
-extern SINTABLE(8192);
-extern SINTABLE(16384);
-extern SINTABLE(32768);
-extern SINTABLE(65536);
+#define ff_fft_init FFT_NAME(ff_fft_init)
+#define ff_fft_end FFT_NAME(ff_fft_end)
/**
* Set up a complex FFT.
* @param inverse if 0 perform the forward transform, if 1 perform the inverse
*/
int ff_fft_init(FFTContext *s, int nbits, int inverse);
-void ff_fft_permute_c(FFTContext *s, FFTComplex *z);
-void ff_fft_calc_c(FFTContext *s, FFTComplex *z);
-void ff_fft_init_altivec(FFTContext *s);
-void ff_fft_init_mmx(FFTContext *s);
+void ff_fft_init_aarch64(FFTContext *s);
+void ff_fft_init_x86(FFTContext *s);
void ff_fft_init_arm(FFTContext *s);
+void ff_fft_init_ppc(FFTContext *s);
-/**
- * Do the permutation needed BEFORE calling ff_fft_calc().
- */
-static inline void ff_fft_permute(FFTContext *s, FFTComplex *z)
-{
- s->fft_permute(s, z);
-}
-/**
- * Do a complex FFT with the parameters defined in ff_fft_init(). The
- * input data must be permuted before. No 1.0/sqrt(n) normalization is done.
- */
-static inline void ff_fft_calc(FFTContext *s, FFTComplex *z)
-{
- s->fft_calc(s, z);
-}
-void ff_fft_end(FFTContext *s);
-
-/* MDCT computation */
-
-static inline void ff_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
-{
- s->imdct_calc(s, output, input);
-}
-static inline void ff_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input)
-{
- s->imdct_half(s, output, input);
-}
+void ff_fft_fixed_init_arm(FFTContext *s);
-static inline void ff_mdct_calc(FFTContext *s, FFTSample *output,
- const FFTSample *input)
-{
- s->mdct_calc(s, output, input);
-}
-
-/**
- * Maximum window size for ff_kbd_window_init.
- */
-#define FF_KBD_WINDOW_MAX 1024
-
-/**
- * Generate a Kaiser-Bessel Derived Window.
- * @param window pointer to half window
- * @param alpha determines window shape
- * @param n size of half window, max FF_KBD_WINDOW_MAX
- */
-void ff_kbd_window_init(float *window, float alpha, int n);
+void ff_fft_end(FFTContext *s);
-/**
- * Generate a sine window.
- * @param window pointer to half window
- * @param n size of half window
- */
-void ff_sine_window_init(float *window, int n);
-
-/**
- * initialize the specified entry of ff_sine_windows
- */
-void ff_init_ff_sine_windows(int index);
-extern SINETABLE( 32);
-extern SINETABLE( 64);
-extern SINETABLE( 128);
-extern SINETABLE( 256);
-extern SINETABLE( 512);
-extern SINETABLE(1024);
-extern SINETABLE(2048);
-extern SINETABLE(4096);
-extern SINETABLE_CONST float * const ff_sine_windows[13];
+#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);
-/* Real Discrete Fourier Transform */
-
-struct RDFTContext {
- int nbits;
- int inverse;
- int sign_convention;
-
- /* pre/post rotation tables */
- const FFTSample *tcos;
- SINTABLE_CONST FFTSample *tsin;
- FFTContext fft;
- void (*rdft_calc)(struct RDFTContext *s, FFTSample *z);
-};
+void ff_mdct_init_aarch64(FFTContext *s);
+void ff_mdct_init_arm(FFTContext *s);
+void ff_mdct_init_ppc(FFTContext *s);
+void ff_mdct_init_x86(FFTContext *s);
-/**
- * Set up a real FFT.
- * @param nbits log2 of the length of the input array
- * @param trans the type of transform
- */
-int ff_rdft_init(RDFTContext *s, int nbits, enum RDFTransformType trans);
-void ff_rdft_end(RDFTContext *s);
-
-void ff_rdft_init_arm(RDFTContext *s);
-
-static av_always_inline void ff_rdft_calc(RDFTContext *s, FFTSample *data)
-{
- s->rdft_calc(s, data);
-}
-
-/* Discrete Cosine Transform */
-
-struct DCTContext {
- int nbits;
- int inverse;
- RDFTContext rdft;
- const float *costab;
- FFTSample *csc2;
- void (*dct_calc)(struct DCTContext *s, FFTSample *data);
- void (*dct32)(FFTSample *out, const FFTSample *in);
-};
-
-/**
- * Set up DCT.
- * @param nbits size of the input array:
- * (1 << nbits) for DCT-II, DCT-III and DST-I
- * (1 << nbits) + 1 for DCT-I
- *
- * @note the first element of the input of DST-I is ignored
- */
-int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType type);
-void ff_dct_calc(DCTContext *s, FFTSample *data);
-void ff_dct_end (DCTContext *s);
+void ff_mdct_fixed_init_arm(FFTContext *s);
#endif /* AVCODEC_FFT_H */
projects / ffmpeg / blobdiff