Merged-by: Michael Niedermayer <michaelni@gmx.at>oldabi
Michael Niedermayer
14 years ago
commit
d4a50a2100
44 changed files with 458 additions and 275 deletions
@ -0,0 +1,50 @@ |
|||||||
|
/*
|
||||||
|
* (I)DCT Transforms |
||||||
|
* Copyright (c) 2009 Peter Ross <pross@xvid.org> |
||||||
|
* Copyright (c) 2010 Alex Converse <alex.converse@gmail.com> |
||||||
|
* Copyright (c) 2010 Vitor Sessak |
||||||
|
* |
||||||
|
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA |
||||||
|
*/ |
||||||
|
|
||||||
|
#ifndef AVCODEC_DCT_H |
||||||
|
#define AVCODEC_DCT_H |
||||||
|
|
||||||
|
#include "rdft.h" |
||||||
|
|
||||||
|
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_end (DCTContext *s); |
||||||
|
|
||||||
|
#endif |
||||||
@ -0,0 +1,48 @@ |
|||||||
|
/*
|
||||||
|
* 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 <assert.h> |
||||||
|
#include <libavutil/mathematics.h> |
||||||
|
#include "libavutil/attributes.h" |
||||||
|
#include "kbdwin.h" |
||||||
|
|
||||||
|
#define BESSEL_I0_ITER 50 // default: 50 iterations of Bessel I0 approximation
|
||||||
|
|
||||||
|
av_cold void ff_kbd_window_init(float *window, float alpha, int n) |
||||||
|
{ |
||||||
|
int i, j; |
||||||
|
double sum = 0.0, bessel, tmp; |
||||||
|
double local_window[FF_KBD_WINDOW_MAX]; |
||||||
|
double alpha2 = (alpha * M_PI / n) * (alpha * M_PI / n); |
||||||
|
|
||||||
|
assert(n <= FF_KBD_WINDOW_MAX); |
||||||
|
|
||||||
|
for (i = 0; i < n; i++) { |
||||||
|
tmp = i * (n - i) * alpha2; |
||||||
|
bessel = 1.0; |
||||||
|
for (j = BESSEL_I0_ITER; j > 0; j--) |
||||||
|
bessel = bessel * tmp / (j * j) + 1; |
||||||
|
sum += bessel; |
||||||
|
local_window[i] = sum; |
||||||
|
} |
||||||
|
|
||||||
|
sum++; |
||||||
|
for (i = 0; i < n; i++) |
||||||
|
window[i] = sqrt(local_window[i] / sum); |
||||||
|
} |
||||||
|
|
||||||
@ -0,0 +1,35 @@ |
|||||||
|
/*
|
||||||
|
* 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 |
||||||
|
*/ |
||||||
|
|
||||||
|
#ifndef AVCODEC_KBDWIN_H |
||||||
|
#define AVCODEC_KBDWIN_H |
||||||
|
|
||||||
|
/**
|
||||||
|
* 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); |
||||||
|
|
||||||
|
#endif |
||||||
@ -0,0 +1,74 @@ |
|||||||
|
/*
|
||||||
|
* (I)RDFT transforms |
||||||
|
* Copyright (c) 2009 Alex Converse <alex dot converse at gmail dot com> |
||||||
|
* |
||||||
|
* 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 |
||||||
|
*/ |
||||||
|
|
||||||
|
#ifndef AVCODEC_RDFT_H |
||||||
|
#define AVCODEC_RDFT_H |
||||||
|
|
||||||
|
#include "config.h" |
||||||
|
#include "fft.h" |
||||||
|
|
||||||
|
#if CONFIG_HARDCODED_TABLES |
||||||
|
# define SINTABLE_CONST const |
||||||
|
#else |
||||||
|
# define SINTABLE_CONST |
||||||
|
#endif |
||||||
|
|
||||||
|
#define SINTABLE(size) \ |
||||||
|
SINTABLE_CONST DECLARE_ALIGNED(16, FFTSample, ff_sin_##size)[size/2] |
||||||
|
|
||||||
|
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); |
||||||
|
|
||||||
|
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); |
||||||
|
}; |
||||||
|
|
||||||
|
/**
|
||||||
|
* 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); |
||||||
|
|
||||||
|
|
||||||
|
#endif |
||||||
@ -0,0 +1,20 @@ |
|||||||
|
/*
|
||||||
|
* 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 "sinewin.h" |
||||||
|
#include "sinewin_tablegen.h" |
||||||
@ -0,0 +1,59 @@ |
|||||||
|
/*
|
||||||
|
* Copyright (c) 2008 Robert Swain |
||||||
|
* |
||||||
|
* 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 |
||||||
|
*/ |
||||||
|
|
||||||
|
#ifndef AVCODEC_SINEWIN_H |
||||||
|
#define AVCODEC_SINEWIN_H |
||||||
|
|
||||||
|
#include "config.h" |
||||||
|
#include "libavutil/mem.h" |
||||||
|
|
||||||
|
#if CONFIG_HARDCODED_TABLES |
||||||
|
# define SINETABLE_CONST const |
||||||
|
#else |
||||||
|
# define SINETABLE_CONST |
||||||
|
#endif |
||||||
|
|
||||||
|
#define SINETABLE(size) \ |
||||||
|
SINETABLE_CONST DECLARE_ALIGNED(16, float, ff_sine_##size)[size] |
||||||
|
|
||||||
|
/**
|
||||||
|
* 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]; |
||||||
|
|
||||||
|
#endif |
||||||
Loading…
Reference in new issue