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-
-
- #ifndef USBaudio_h_
- #define USBaudio_h_
-
- #include "usb_desc.h"
- #ifdef AUDIO_INTERFACE
-
- #define FEATURE_MAX_VOLUME 0xFFF
-
- #ifdef __cplusplus
- extern "C" {
- #endif
- extern uint16_t usb_audio_receive_buffer[];
- extern uint16_t usb_audio_transmit_buffer[];
- extern void usb_audio_receive_callback(unsigned int len);
- extern unsigned int usb_audio_transmit_callback(void);
- int usb_audio_set_feature(void *stp, uint8_t *buf);
- int usb_audio_get_feature(void *stp, uint8_t *data, uint32_t *datalen);
-
- extern uint32_t usb_audio_sync_feedback;
- extern uint8_t usb_audio_receive_setting;
- extern uint8_t usb_audio_transmit_setting;
- #ifdef __cplusplus
- }
-
-
- struct usb_audio_features_struct {
- int change;
- int mute;
- int volume;
- };
-
- #include "AudioStream.h"
-
- class AudioInputUSB : public AudioStream
- {
- public:
- AudioInputUSB(void) : AudioStream(0, NULL) { begin(); }
- virtual void update(void);
- void begin(void);
- friend void usb_audio_receive_callback(unsigned int len);
- friend int usb_audio_set_feature(void *stp, uint8_t *buf);
- friend int usb_audio_get_feature(void *stp, uint8_t *data, uint32_t *datalen);
- static struct usb_audio_features_struct features;
- float volume(void) {
- if (features.mute) return 0.0;
- return (float)(features.volume) * (1.0 / (float)FEATURE_MAX_VOLUME);
- }
- private:
- static bool update_responsibility;
- static audio_block_t *incoming_left;
- static audio_block_t *incoming_right;
- static audio_block_t *ready_left;
- static audio_block_t *ready_right;
- static uint16_t incoming_count;
- static uint8_t receive_flag;
- };
-
- class AudioOutputUSB : public AudioStream
- {
- public:
- AudioOutputUSB(void) : AudioStream(2, inputQueueArray) { begin(); }
- virtual void update(void);
- void begin(void);
- friend unsigned int usb_audio_transmit_callback(void);
- private:
- static bool update_responsibility;
- static audio_block_t *left_1st;
- static audio_block_t *left_2nd;
- static audio_block_t *right_1st;
- static audio_block_t *right_2nd;
- static uint16_t offset_1st;
- audio_block_t *inputQueueArray[2];
- };
-
- #endif
- #endif
- #endif
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