analyze_peakdetect.cpp 2.0KB

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  1. /* Audio Library for Teensy 3.X
  2. * Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
  3. *
  4. * Development of this audio library was funded by PJRC.COM, LLC by sales of
  5. * Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
  6. * open source software by purchasing Teensy or other PJRC products.
  7. *
  8. * Permission is hereby granted, free of charge, to any person obtaining a copy
  9. * of this software and associated documentation files (the "Software"), to deal
  10. * in the Software without restriction, including without limitation the rights
  11. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12. * copies of the Software, and to permit persons to whom the Software is
  13. * furnished to do so, subject to the following conditions:
  14. *
  15. * The above copyright notice, development funding notice, and this permission
  16. * notice shall be included in all copies or substantial portions of the Software.
  17. *
  18. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24. * THE SOFTWARE.
  25. */
  26. #include "analyze_peakdetect.h"
  27. // #define PEAKREPORTVERBS
  28. void AudioPeak::update(void)
  29. {
  30. audio_block_t *block;
  31. const int16_t *p, *end;
  32. block = receiveReadOnly();
  33. if (!block) {
  34. #ifdef PEAKREPORTVERBS
  35. Serial.println("AudioPeak !block");
  36. #endif
  37. return;
  38. }
  39. if (!m_enabled) {
  40. release(block);
  41. return;
  42. }
  43. p = block->data;
  44. end = p + AUDIO_BLOCK_SAMPLES;
  45. do {
  46. int16_t d=*p++;
  47. if(d<min) min=d;
  48. if(d>max) max=d;
  49. } while (p < end);
  50. #ifdef PEAKREPORTVERBS
  51. Serial.println("AudioPeak ran");
  52. #endif
  53. release(block);
  54. }
  55. void AudioPeak::begin(bool noReset)
  56. {
  57. if(!noReset)
  58. {
  59. min=0;
  60. max=0;
  61. }
  62. m_enabled=true;
  63. }
  64. uint16_t AudioPeak::Dpp(void)
  65. {
  66. return max-min;
  67. }