/*

 * Header file for hardcoded sine windows

 *

 * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>

 *

 * 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_TABLEGEN_H

#define AVCODEC_SINEWIN_TABLEGEN_H

#include <assert.h>

// do not use libavutil/libm.h since this is compiled both

// for the host and the target and config.h is only valid for the target

#include <math.h>

#include "libavutil/attributes.h"

#include "libavutil/common.h"

#if !CONFIG_HARDCODED_TABLES

#ifndef BUILD_TABLES

#include "libavutil/thread.h"

#endif

SINETABLE(  32);

SINETABLE(  64);

SINETABLE( 128);

SINETABLE( 256);

SINETABLE( 512);

SINETABLE(1024);

SINETABLE(2048);

SINETABLE(4096);

SINETABLE(8192);

#else

#include "libavcodec/sinewin_tables.h"

#endif

SINETABLE_CONST float *const ff_sine_windows[] = {

    NULL, NULL, NULL, NULL, NULL, // unused

    ff_sine_32,   ff_sine_64,   ff_sine_128,

    ff_sine_256,  ff_sine_512,  ff_sine_1024,

    ff_sine_2048, ff_sine_4096, ff_sine_8192,

};

// Generate a sine window.

av_cold void ff_sine_window_init(float *window, int n)

{

    int i;

    for(i = 0; i < n; i++)

        window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n)));

}

#if !CONFIG_HARDCODED_TABLES && !defined(BUILD_TABLES)

#define INIT_FF_SINE_WINDOW_INIT_FUNC(index)        \

static void init_ff_sine_window_ ## index(void)     \

{                                                   \

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

}

sinewin.c:init_ff_sine_window_5

Line

Count

Source

68

3

static void init_ff_sine_window_ ## index(void)     \

69

3

{                                                   \

70

3

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

3

}

sinewin.c:init_ff_sine_window_6

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68

7

static void init_ff_sine_window_ ## index(void)     \

69

7

{                                                   \

70

7

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

7

}

sinewin.c:init_ff_sine_window_7

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68

10

static void init_ff_sine_window_ ## index(void)     \

69

10

{                                                   \

70

10

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

10

}

sinewin.c:init_ff_sine_window_8

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68

7

static void init_ff_sine_window_ ## index(void)     \

69

7

{                                                   \

70

7

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

7

}

sinewin.c:init_ff_sine_window_9

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68

9

static void init_ff_sine_window_ ## index(void)     \

69

9

{                                                   \

70

9

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

9

}

sinewin.c:init_ff_sine_window_10

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68

9

static void init_ff_sine_window_ ## index(void)     \

69

9

{                                                   \

70

9

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

9

}

sinewin.c:init_ff_sine_window_11

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Source

68

7

static void init_ff_sine_window_ ## index(void)     \

69

7

{                                                   \

70

7

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

7

}

sinewin.c:init_ff_sine_window_12

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68

3

static void init_ff_sine_window_ ## index(void)     \

69

3

{                                                   \

70

3

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

3

}

sinewin.c:init_ff_sine_window_13

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68

3

static void init_ff_sine_window_ ## index(void)     \

69

3

{                                                   \

70

3

    ff_sine_window_init(ff_sine_windows[index], 1 << index);\

71

3

}

INIT_FF_SINE_WINDOW_INIT_FUNC(5)

INIT_FF_SINE_WINDOW_INIT_FUNC(6)

INIT_FF_SINE_WINDOW_INIT_FUNC(7)

INIT_FF_SINE_WINDOW_INIT_FUNC(8)

INIT_FF_SINE_WINDOW_INIT_FUNC(9)

INIT_FF_SINE_WINDOW_INIT_FUNC(10)

INIT_FF_SINE_WINDOW_INIT_FUNC(11)

INIT_FF_SINE_WINDOW_INIT_FUNC(12)

INIT_FF_SINE_WINDOW_INIT_FUNC(13)

static void (*const sine_window_init_func_array[])(void) = {

    init_ff_sine_window_5,

    init_ff_sine_window_6,

    init_ff_sine_window_7,

    init_ff_sine_window_8,

    init_ff_sine_window_9,

    init_ff_sine_window_10,

    init_ff_sine_window_11,

    init_ff_sine_window_12,

    init_ff_sine_window_13,

};

static AVOnce init_sine_window_once[9] = {

    AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT,

    AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT

};

#endif

av_cold void ff_init_ff_sine_windows(int index)

{

    assert(index >= 5 && index < FF_ARRAY_ELEMS(ff_sine_windows));

#if !CONFIG_HARDCODED_TABLES

#ifdef BUILD_TABLES

    ff_sine_window_init(ff_sine_windows[index], 1 << index);

#else

    ff_thread_once(&init_sine_window_once[index - 5], sine_window_init_func_array[index - 5]);

#endif

#endif

}

#endif /* AVCODEC_SINEWIN_TABLEGEN_H */