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apps/common/device/usb/host/audio.h

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+#ifndef  __AUDIO_H__
+#define  __AUDIO_H__
+
+#include "system/task.h"
+#include "device/device.h"
+#include "usb_bulk_transfer.h"
+#include "usb/host/usb_host.h"
+#include "usb/device/uac_audio.h"
+
+
+#define HEADPHONE_SUPPORTED                0x01
+#define MICROPHONE_SUPPORTED               0x02
+#define HEADSET_SUPPORTED                  0x03
+
+struct audio_streaming_t {
+    u8  bNumEndpoints;
+    u8  bFormatType;		/** FORMAT_TYPE_1 */
+    u8  bNrChannels;		/** physical channels in the stream */
+    u8  bSubframeSize;
+    u8  bBitResolution;
+    u8  bSamFreqType;
+    u32 tSamFreq[8];
+    u8  host_ep; //主机传输端点
+    u8  ep; //从机端点(由描述符中指定)
+    u8  ep_Interval;
+    u16 ep_max_packet_size;
+};
+
+struct audio_device_t {
+    u8 interface_num; //接口号
+    u8 subclass;
+    u8 support;
+    void *parent;
+    struct audio_streaming_t as[8];
+};
+
+int usb_audio_parser(struct usb_host_device *host_dev, u8 interface_num, const u8 *pBuf);
+
+// API
+int usb_audio_play_put_buf(void *ptr, u32 len);
+int usb_audio_record_get_buf(void *ptr, u32 len);
+
+//headphone api
+void set_usb_audio_play_volume(u16 vol);
+void usb_audio_start_play(const usb_dev usb_id, u8 channel, u8 bit_reso, u32 sample_rate); //指定播放数据的声道数,位数,采样率
+void usb_audio_stop_play(const usb_dev usb_id);
+void usb_audio_pause_play(void);
+void usb_audio_resume_play(void);
+
+//microphone api
+void set_usb_audio_record_volume(u16 vol);
+void usb_audio_start_record(const usb_dev usb_id, u8 bit_reso, u32 sample_rate); //指定录制数据的位数,采样率
+void usb_audio_stop_record(const usb_dev usb_id);
+void usb_audio_pause_record(void);
+void usb_audio_resume_record(void);
+#endif