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Teensy 4.1 core updated for C++20
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teensy-core-4.1/teensy3/usb_audio.h

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  1. #ifndef USBaudio_h_

  2. #define USBaudio_h_

  3. 

  4. #include "usb_desc.h"

  5. #ifdef AUDIO_INTERFACE

  6. 

  7. #ifdef __cplusplus

  8. extern "C" {

  9. #endif

  10. extern uint16_t usb_audio_receive_buffer[];

  11. extern uint16_t usb_audio_transmit_buffer[];

  12. extern void usb_audio_receive_callback(unsigned int len);

  13. extern unsigned int usb_audio_transmit_callback(void);

  14. extern uint32_t usb_audio_sync_feedback;

  15. extern uint8_t usb_audio_receive_setting;

  16. extern uint8_t usb_audio_transmit_setting;

  17. #ifdef __cplusplus

  18. }

  19. 

  20. #include "AudioStream.h"

  21. 

  22. class AudioInputUSB : public AudioStream

  23. {

  24. public:

  25. 	AudioInputUSB(void) : AudioStream(0, NULL) { begin(); }

  26. 	virtual void update(void);

  27. 	void begin(void);

  28. 	friend void usb_audio_receive_callback(unsigned int len);

  29. private:

  30. 	static bool update_responsibility;

  31. 	static audio_block_t *incoming_left;

  32. 	static audio_block_t *incoming_right;

  33. 	static audio_block_t *ready_left;

  34. 	static audio_block_t *ready_right;

  35. 	static uint16_t incoming_count;

  36. 	static uint8_t receive_flag;

  37. };

  38. 

  39. class AudioOutputUSB : public AudioStream

  40. {

  41. public:

  42. 	AudioOutputUSB(void) : AudioStream(2, inputQueueArray) { begin(); }

  43. 	virtual void update(void);

  44. 	void begin(void);

  45. 	friend unsigned int usb_audio_transmit_callback(void);

  46. private:

  47. 	static bool update_responsibility;

  48. 	static audio_block_t *left_1st;

  49. 	static audio_block_t *left_2nd;

  50. 	static audio_block_t *right_1st;

  51. 	static audio_block_t *right_2nd;

  52. 	static uint16_t offset_1st;

  53. 	audio_block_t *inputQueueArray[2];

  54. };

  55. 

  56. #endif // __cplusplus

  57. #endif // AUDIO_INTERFACE

  58. #endif // USBaudio_h_