108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
/* Teensyduino Core Library
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* http://www.pjrc.com/teensy/
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* Copyright (c) 2017 PJRC.COM, LLC.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* 1. The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* 2. If the Software is incorporated into a build system that allows
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* selection among a list of target devices, then similar target
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* devices manufactured by PJRC.COM must be included in the list of
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* target devices and selectable in the same manner.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef USBaudio_h_
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#define USBaudio_h_
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#include "usb_desc.h"
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#ifdef AUDIO_INTERFACE
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#define FEATURE_MAX_VOLUME 0xFFF // volume accepted from 0 to 0xFFF
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern uint16_t usb_audio_receive_buffer[];
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extern uint16_t usb_audio_transmit_buffer[];
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extern void usb_audio_receive_callback(unsigned int len);
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extern unsigned int usb_audio_transmit_callback(void);
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int usb_audio_set_feature(void *stp, uint8_t *buf);
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int usb_audio_get_feature(void *stp, uint8_t *data, uint32_t *datalen);
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extern uint32_t usb_audio_sync_feedback;
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extern uint8_t usb_audio_receive_setting;
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extern uint8_t usb_audio_transmit_setting;
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#ifdef __cplusplus
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}
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// audio features supported
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struct usb_audio_features_struct {
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int change; // set to 1 when any value is changed
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int mute; // 1=mute, 0=unmute
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int volume; // volume from 0 to FEATURE_MAX_VOLUME, maybe should be float from 0.0 to 1.0
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};
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#include "AudioStream.h"
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class AudioInputUSB : public AudioStream
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{
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public:
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AudioInputUSB(void) : AudioStream(0, NULL) { begin(); }
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virtual void update(void);
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void begin(void);
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friend void usb_audio_receive_callback(unsigned int len);
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friend int usb_audio_set_feature(void *stp, uint8_t *buf);
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friend int usb_audio_get_feature(void *stp, uint8_t *data, uint32_t *datalen);
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static struct usb_audio_features_struct features;
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float volume(void) {
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if (features.mute) return 0.0;
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return (float)(features.volume) * (1.0 / (float)FEATURE_MAX_VOLUME);
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}
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private:
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static bool update_responsibility;
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static audio_block_t *incoming_left;
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static audio_block_t *incoming_right;
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static audio_block_t *ready_left;
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static audio_block_t *ready_right;
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static uint16_t incoming_count;
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static uint8_t receive_flag;
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};
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class AudioOutputUSB : public AudioStream
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{
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public:
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AudioOutputUSB(void) : AudioStream(2, inputQueueArray) { begin(); }
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virtual void update(void);
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void begin(void);
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friend unsigned int usb_audio_transmit_callback(void);
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private:
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static bool update_responsibility;
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static audio_block_t *left_1st;
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static audio_block_t *left_2nd;
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static audio_block_t *right_1st;
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static audio_block_t *right_2nd;
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static uint16_t offset_1st;
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audio_block_t *inputQueueArray[2];
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};
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#endif // __cplusplus
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#endif // AUDIO_INTERFACE
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#endif // USBaudio_h_
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