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/* |
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* Header file for hardcoded sine windows |
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* |
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* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_SINEWIN_TABLEGEN_H |
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#define AVCODEC_SINEWIN_TABLEGEN_H |
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#include <assert.h> |
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// do not use libavutil/libm.h since this is compiled both |
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// for the host and the target and config.h is only valid for the target |
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#include <math.h> |
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#include "libavutil/attributes.h" |
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#include "libavutil/common.h" |
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#if !CONFIG_HARDCODED_TABLES |
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#ifndef BUILD_TABLES |
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#include "libavutil/thread.h" |
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#endif |
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SINETABLE( 32); |
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SINETABLE( 64); |
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SINETABLE( 128); |
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SINETABLE( 256); |
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SINETABLE( 512); |
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SINETABLE(1024); |
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SINETABLE(2048); |
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SINETABLE(4096); |
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SINETABLE(8192); |
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#else |
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#include "libavcodec/sinewin_tables.h" |
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#endif |
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SINETABLE_CONST float *const ff_sine_windows[] = { |
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NULL, NULL, NULL, NULL, NULL, // unused |
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ff_sine_32, ff_sine_64, ff_sine_128, |
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ff_sine_256, ff_sine_512, ff_sine_1024, |
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ff_sine_2048, ff_sine_4096, ff_sine_8192, |
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}; |
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// Generate a sine window. |
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av_cold void ff_sine_window_init(float *window, int n) |
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{ |
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int i; |
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2/2
✓ Branch 0 taken 552616 times.
✓ Branch 1 taken 884 times.
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for(i = 0; i < n; i++) |
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window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n))); |
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} |
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#if !CONFIG_HARDCODED_TABLES && !defined(BUILD_TABLES) |
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#define INIT_FF_SINE_WINDOW_INIT_FUNC(index) \ |
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static void init_ff_sine_window_ ## index(void) \ |
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{ \ |
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ff_sine_window_init(ff_sine_windows[index], 1 << index);\ |
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} |
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INIT_FF_SINE_WINDOW_INIT_FUNC(5) |
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INIT_FF_SINE_WINDOW_INIT_FUNC(6) |
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INIT_FF_SINE_WINDOW_INIT_FUNC(7) |
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INIT_FF_SINE_WINDOW_INIT_FUNC(8) |
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INIT_FF_SINE_WINDOW_INIT_FUNC(9) |
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INIT_FF_SINE_WINDOW_INIT_FUNC(10) |
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INIT_FF_SINE_WINDOW_INIT_FUNC(11) |
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INIT_FF_SINE_WINDOW_INIT_FUNC(12) |
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INIT_FF_SINE_WINDOW_INIT_FUNC(13) |
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static void (*const sine_window_init_func_array[])(void) = { |
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init_ff_sine_window_5, |
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init_ff_sine_window_6, |
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init_ff_sine_window_7, |
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init_ff_sine_window_8, |
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init_ff_sine_window_9, |
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init_ff_sine_window_10, |
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init_ff_sine_window_11, |
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init_ff_sine_window_12, |
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init_ff_sine_window_13, |
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}; |
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static AVOnce init_sine_window_once[9] = { |
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AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, |
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AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT |
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}; |
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#endif |
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av_cold void ff_init_ff_sine_windows(int index) |
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{ |
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assert(index >= 5 && index < FF_ARRAY_ELEMS(ff_sine_windows)); |
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#if !CONFIG_HARDCODED_TABLES |
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#ifdef BUILD_TABLES |
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ff_sine_window_init(ff_sine_windows[index], 1 << index); |
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#else |
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ff_thread_once(&init_sine_window_once[index - 5], sine_window_init_func_array[index - 5]); |
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#endif |
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#endif |
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} |
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#endif /* AVCODEC_SINEWIN_TABLEGEN_H */ |
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