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xswitch
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libs
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libvpx
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vpx_dsp
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txfm_common.h

txfm_common.h 2.5 KB
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  1. /*
    2. 

  2.  *  Copyright (c) 2015 The WebM project authors. All Rights Reserved.
    3. 

  3.  *
    4. 

  4.  *  Use of this source code is governed by a BSD-style license
    5. 

  5.  *  that can be found in the LICENSE file in the root of the source
    6. 

  6.  *  tree. An additional intellectual property rights grant can be found
    7. 

  7.  *  in the file PATENTS.  All contributing project authors may
    8. 

  8.  *  be found in the AUTHORS file in the root of the source tree.
    9. 

  9.  */
    10. 

  10. 

  11. #ifndef VPX_VPX_DSP_TXFM_COMMON_H_
    12. 

  12. #define VPX_VPX_DSP_TXFM_COMMON_H_
    13. 

  13. 

  14. #include "vpx_dsp/vpx_dsp_common.h"
    15. 

  15. 

  16. // Constants and Macros used by all idct/dct functions
    17. 

  17. #define DCT_CONST_BITS 14
    18. 

  18. #define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1))
    19. 

  19. 

  20. #define UNIT_QUANT_SHIFT 2
    21. 

  21. #define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT)
    22. 

  22. 

  23. // Constants:
    24. 

  24. //  for (int i = 1; i< 32; ++i)
    25. 

  25. //    printf("static const int cospi_%d_64 = %.0f;\n", i,
    26. 

  26. //           round(16384 * cos(i*M_PI/64)));
    27. 

  27. // Note: sin(k*Pi/64) = cos((32-k)*Pi/64)
    28. 

  28. static const tran_coef_t cospi_1_64 = 16364;
    29. 

  29. static const tran_coef_t cospi_2_64 = 16305;
    30. 

  30. static const tran_coef_t cospi_3_64 = 16207;
    31. 

  31. static const tran_coef_t cospi_4_64 = 16069;
    32. 

  32. static const tran_coef_t cospi_5_64 = 15893;
    33. 

  33. static const tran_coef_t cospi_6_64 = 15679;
    34. 

  34. static const tran_coef_t cospi_7_64 = 15426;
    35. 

  35. static const tran_coef_t cospi_8_64 = 15137;
    36. 

  36. static const tran_coef_t cospi_9_64 = 14811;
    37. 

  37. static const tran_coef_t cospi_10_64 = 14449;
    38. 

  38. static const tran_coef_t cospi_11_64 = 14053;
    39. 

  39. static const tran_coef_t cospi_12_64 = 13623;
    40. 

  40. static const tran_coef_t cospi_13_64 = 13160;
    41. 

  41. static const tran_coef_t cospi_14_64 = 12665;
    42. 

  42. static const tran_coef_t cospi_15_64 = 12140;
    43. 

  43. static const tran_coef_t cospi_16_64 = 11585;
    44. 

  44. static const tran_coef_t cospi_17_64 = 11003;
    45. 

  45. static const tran_coef_t cospi_18_64 = 10394;
    46. 

  46. static const tran_coef_t cospi_19_64 = 9760;
    47. 

  47. static const tran_coef_t cospi_20_64 = 9102;
    48. 

  48. static const tran_coef_t cospi_21_64 = 8423;
    49. 

  49. static const tran_coef_t cospi_22_64 = 7723;
    50. 

  50. static const tran_coef_t cospi_23_64 = 7005;
    51. 

  51. static const tran_coef_t cospi_24_64 = 6270;
    52. 

  52. static const tran_coef_t cospi_25_64 = 5520;
    53. 

  53. static const tran_coef_t cospi_26_64 = 4756;
    54. 

  54. static const tran_coef_t cospi_27_64 = 3981;
    55. 

  55. static const tran_coef_t cospi_28_64 = 3196;
    56. 

  56. static const tran_coef_t cospi_29_64 = 2404;
    57. 

  57. static const tran_coef_t cospi_30_64 = 1606;
    58. 

  58. static const tran_coef_t cospi_31_64 = 804;
    59. 

  59. 

  60. //  16384 * sqrt(2) * sin(kPi/9) * 2 / 3
    61. 

  61. static const tran_coef_t sinpi_1_9 = 5283;
    62. 

  62. static const tran_coef_t sinpi_2_9 = 9929;
    63. 

  63. static const tran_coef_t sinpi_3_9 = 13377;
    64. 

  64. static const tran_coef_t sinpi_4_9 = 15212;
    65. 

  65. 

  66. #endif  // VPX_VPX_DSP_TXFM_COMMON_H_
    67.