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  1. /* Audio Library for Teensy 3.X
  2. * Copyright (c) 2015, Hedde Bosman
  3. *
  4. * Permission is hereby granted, free of charge, to any person obtaining a copy
  5. * of this software and associated documentation files (the "Software"), to deal
  6. * in the Software without restriction, including without limitation the rights
  7. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  8. * copies of the Software, and to permit persons to whom the Software is
  9. * furnished to do so, subject to the following conditions:
  10. *
  11. * The above copyright notice and this permission notice shall be included in
  12. * all copies or substantial portions of the Software.
  13. *
  14. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  20. * THE SOFTWARE.
  21. */
  22. #ifndef effect_midside_decode_h_
  23. #define effect_midside_decode_h_
  24. #include "Arduino.h"
  25. #include "AudioStream.h"
  26. #include "utility/dspinst.h"
  27. /**
  28. * This object performs the decoding of mid/side signals into a stereo signal.
  29. * That is, left = (mid+side), right = (mid-side)
  30. * After encoding and processing, this object decodes the mid/side components
  31. * back into enjoyable stereo audio.
  32. * Caution: processed mid/side signals may cause digital saturation (clipping).
  33. ***************************************************************/
  34. class AudioEffectMidSide : public AudioStream
  35. {
  36. public:
  37. AudioEffectMidSide(void): AudioStream(2,inputQueueArray), encoding(true) { }
  38. void encode() { encoding = true; }
  39. void decode() { encoding = false; }
  40. virtual void update(void);
  41. private:
  42. bool encoding;
  43. audio_block_t *inputQueueArray[2];
  44. };
  45. #endif