Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * Header file for hardcoded sine windows
  3.  *
  4.  * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #ifndef AVCODEC_SINEWIN_TABLEGEN_H
  24. #define AVCODEC_SINEWIN_TABLEGEN_H
  25.  
  26. #include <assert.h>
  27. // do not use libavutil/libm.h since this is compiled both
  28. // for the host and the target and config.h is only valid for the target
  29. #include <math.h>
  30. #include "libavcodec/aac_defines.h"
  31. #include "libavutil/attributes.h"
  32. #include "libavutil/common.h"
  33.  
  34. #if !CONFIG_HARDCODED_TABLES
  35. SINETABLE(  32);
  36. SINETABLE(  64);
  37. SINETABLE( 128);
  38. SINETABLE( 256);
  39. SINETABLE( 512);
  40. SINETABLE(1024);
  41. SINETABLE(2048);
  42. SINETABLE(4096);
  43. SINETABLE(8192);
  44. #else
  45. #if USE_FIXED
  46. #include "libavcodec/sinewin_fixed_tables.h"
  47. #else
  48. #include "libavcodec/sinewin_tables.h"
  49. #endif
  50. #endif
  51.  
  52. #if USE_FIXED
  53. #define SIN_FIX(a) (int)floor((a) * 0x80000000 + 0.5)
  54. #else
  55. #define SIN_FIX(a) a
  56. #endif
  57.  
  58. SINETABLE_CONST INTFLOAT * const AAC_RENAME(ff_sine_windows)[] = {
  59.     NULL, NULL, NULL, NULL, NULL, // unused
  60.     AAC_RENAME(ff_sine_32) , AAC_RENAME(ff_sine_64), AAC_RENAME(ff_sine_128),
  61.     AAC_RENAME(ff_sine_256), AAC_RENAME(ff_sine_512), AAC_RENAME(ff_sine_1024),
  62.     AAC_RENAME(ff_sine_2048), AAC_RENAME(ff_sine_4096), AAC_RENAME(ff_sine_8192)
  63. };
  64.  
  65. // Generate a sine window.
  66. av_cold void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n) {
  67.     int i;
  68.     for(i = 0; i < n; i++)
  69.         window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n))));
  70. }
  71.  
  72. av_cold void AAC_RENAME(ff_init_ff_sine_windows)(int index) {
  73.     assert(index >= 0 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows)));
  74. #if !CONFIG_HARDCODED_TABLES
  75.     AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);
  76. #endif
  77. }
  78.  
  79. #endif /* AVCODEC_SINEWIN_TABLEGEN_H */
  80.