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new-session-manager
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Assists music production by grouping standalone programs into sessions. Community version of "Non Session Manager".
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new-session-manager/nonlib/dsp.h

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  1. 

  2. /*******************************************************************************/

  3. /* Copyright (C) 2008 Jonathan Moore Liles                                     */

  4. /*                                                                             */

  5. /* This program is free software; you can redistribute it and/or modify it     */

  6. /* under the terms of the GNU General Public License as published by the       */

  7. /* Free Software Foundation; either version 2 of the License, or (at your      */

  8. /* option) any later version.                                                  */

  9. /*                                                                             */

  10. /* This program is distributed in the hope that it will be useful, but WITHOUT */

  11. /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or       */

  12. /* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for   */

  13. /* more details.                                                               */

  14. /*                                                                             */

  15. /* You should have received a copy of the GNU General Public License along     */

  16. /* with This program; see the file COPYING.  If not,write to the Free Software */

  17. /* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

  18. /*******************************************************************************/

  19. 

  20. #pragma once

  21. 

  22. #include "JACK/Client.H"

  23. #include <math.h>

  24. 

  25. 

  26. sample_t *buffer_alloc ( nframes_t size );

  27. void buffer_apply_gain ( sample_t *buf, nframes_t nframes, float g );

  28. void buffer_apply_gain_unaligned ( sample_t *buf, nframes_t nframes, float g );

  29. void buffer_apply_gain_buffer ( sample_t *buf, const sample_t *gainbuf, nframes_t nframes );

  30. void buffer_copy_and_apply_gain_buffer ( sample_t *dst, const sample_t *src, const sample_t *gainbuf, nframes_t nframes );

  31. void buffer_mix ( sample_t *dst, const sample_t *src, nframes_t nframes );

  32. void buffer_mix_with_gain ( sample_t *dst, const sample_t *src, nframes_t nframes, float g );

  33. void buffer_interleave_one_channel ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes );

  34. void buffer_interleave_one_channel_and_mix ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes );

  35. void buffer_deinterleave_one_channel ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes );

  36. void buffer_interleaved_mix ( sample_t *__restrict__ dst, const sample_t * __restrict__ src, int dst_channel, int src_channel, int dst_channels, int src_channels, nframes_t nframes );

  37. void buffer_interleaved_copy ( sample_t *__restrict__ dst, const sample_t * __restrict__ src, int dst_channel, int src_channel, int dst_channels, int src_channels, nframes_t nframes );

  38. void buffer_fill_with_silence ( sample_t *buf, nframes_t nframes );

  39. bool buffer_is_digital_black ( const sample_t *buf, nframes_t nframes );

  40. float buffer_get_peak ( const sample_t *buf, nframes_t nframes );

  41. void buffer_copy ( sample_t *dst, const sample_t *src, nframes_t nframes );

  42. void buffer_copy_and_apply_gain ( sample_t *dst, const sample_t *src, nframes_t nframes, float gain );

  43. 

  44. class Value_Smoothing_Filter

  45. {

  46.     float w, g1, g2;

  47.     

  48.     float _cutoff;

  49. 

  50. public:

  51. 

  52.     Value_Smoothing_Filter ( )

  53.     {

  54.         g1 = g2 = 0;

  55.         _cutoff = 10.0f;

  56.     }

  57. 

  58.     void cutoff ( float v ) { _cutoff = v; }

  59. 

  60.     void sample_rate ( nframes_t v );

  61.     

  62.     inline bool target_reached ( float gt ) const { return gt == g2; }

  63.  

  64.     bool apply ( sample_t *dst, nframes_t nframes, float target );

  65. 

  66. };

  67. 

  68. static inline float interpolate_cubic ( const float fr, const float inm1, const float in, const float inp1, const float inp2)

  69. {

  70.     return in + 0.5f * fr * (inp1 - inm1 +

  71.                              fr * (4.0f * inp1 + 2.0f * inm1 - 5.0f * in - inp2 +

  72.                                    fr * (3.0f * (in - inp1) - inm1 + inp2)));

  73. }

  74. 

  75. // from SWH plugins.

  76. // Convert a value in dB's to a coefficent

  77. #define DB_CO(g) ((g) > -90.0f ? powf(10.0f, (g) * 0.05f) : 0.0f)

  78. #define CO_DB(v) (20.0f * log10f(v))

  79. 

  80. #define DEG2RAD       0.01745329251f

  81. #define ONEOVERSQRT2  0.70710678118f