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##

# 3.3.4.43 USB_HOST_AUDIO_V1_StreamWrite Function

## C

    USB_HOST_AUDIO_V1_RESULT USB_HOST_AUDIO_V1_StreamWrite(
        USB_HOST_AUDIO_V1_STREAM_HANDLE streamHandle,
        USB_HOST_AUDIO_V1_STREAM_TRANSFER_HANDLE * transferHandle,
        void * source,
        size_t length
    );

## Summary

This function schedules an audio stream write request for the specified audio stream. A USB_HOST_AUDIO_V1_STREAM_EVENT_WRITE_COMPLETE event is generated when this request is completed. USB_HOST_AUDIO_V1_STREAM_EVENT_WRITE_COMPLETE_DATA returns the status and request handle of the request.

## Precondition

The audio stream should have been opened and enabled. The direction of the audio stream should be USB_HOST_AUDIO_V1_DIRECTION_OUT.

## Parameters

Parameters | Description
streamHandle | Handle to the Audio v1.0 stream
transferHandle | Handle to the stream write transfer request
source | Pointer to the buffer containing data to be written to the device
length | Amount of data to write (in bytes)

## Returns

- USB_HOST_AUDIO_V1_RESULT_SUCCESS - The operation was successful
- USB_HOST_AUDIO_V1_RESULT_HANDLE_INVALID - The specified audio stream does not exist
- USB_HOST_AUDIO_V1_RESULT_FAILURE - An unknown failure occurred

## Remarks

None.