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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Device Audio Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_audio.h"
#include "ux_device_stack.h"
#if defined(UX_DEVICE_STANDALONE)
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_audio_tasks_run PORTABLE C */
/* 6.2.0 */
/* AUTHOR */
/* */
/* Yajun Xia, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the background task of the audio. */
/* */
/* It's for standalone mode. */
/* */
/* INPUT */
/* */
/* instance Pointer to audio class */
/* */
/* OUTPUT */
/* */
/* State machine status */
/* UX_STATE_EXIT Device not configured */
/* UX_STATE_IDLE No streaming transfer running */
/* UX_STATE_WAIT Streaming transfer running */
/* */
/* CALLS */
/* */
/* (ux_device_class_audio_stream_task_function) */
/* Run stream task */
/* (ux_device_class_audio_stream_feedback_task_function) */
/* Run stream feedback task */
/* */
/* CALLED BY */
/* */
/* USBX Device Stack */
/* */
/**************************************************************************/
UINT _ux_device_class_audio_tasks_run(VOID *instance)
{
UX_SLAVE_DEVICE *device;
UX_DEVICE_CLASS_AUDIO *audio;
UX_DEVICE_CLASS_AUDIO_STREAM *stream;
ULONG stream_index;
UINT status;
#if defined(UX_DEVICE_CLASS_AUDIO_INTERRUPT_SUPPORT)
ULONG interrupt_running_count = 0;
#endif
ULONG stream_running_count = 0;
#if defined(UX_DEVICE_CLASS_AUDIO_FEEDBACK_SUPPORT)
ULONG feedback_running_count = 0;
#endif
/* Get audio instance. */
audio = (UX_DEVICE_CLASS_AUDIO *) instance;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Check if the device is configured. */
if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED)
return(UX_STATE_EXIT);
#if defined(UX_DEVICE_CLASS_AUDIO_INTERRUPT_SUPPORT)
/* Run audio status tasks. */
status = _ux_device_class_audio_interrupt_task_function(audio);
if (status == UX_STATE_EXIT)
return(status);
if (status == UX_STATE_WAIT)
interrupt_running_count++;
#endif
for (stream_index = 0;
stream_index < audio -> ux_device_class_audio_streams_nb;
stream_index ++)
{
stream = &audio -> ux_device_class_audio_streams[stream_index];
status = stream -> ux_device_class_audio_stream_task_function(stream);
if (status == UX_STATE_EXIT)
return(status);
if (status == UX_STATE_WAIT)
stream_running_count ++;
#if defined(UX_DEVICE_CLASS_AUDIO_FEEDBACK_SUPPORT)
if (stream -> ux_device_class_audio_stream_feedback_task_function != UX_NULL)
{
status = stream -> ux_device_class_audio_stream_feedback_task_function(stream);
if (status == UX_STATE_EXIT)
return(status);
if (status == UX_STATE_WAIT)
feedback_running_count ++;
}
#endif
}
if ((stream_running_count > 0)
#if defined(UX_DEVICE_CLASS_AUDIO_INTERRUPT_SUPPORT)
|| (interrupt_running_count > 0)
#endif
#if defined(UX_DEVICE_CLASS_AUDIO_FEEDBACK_SUPPORT)
|| (feedback_running_count > 0)
#endif
)
{
return UX_STATE_WAIT;
}
else
{
return UX_STATE_IDLE;
}
}
#endif
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