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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 */
/** */
/** Video Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_video.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_video_transfer_request_callback PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function receives a completion call back on an isoch transfer */
/* request. */
/* */
/* INPUT */
/* */
/* transfer_request Pointer to transfer request */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* (ux_host_class_video_transfer_completion_function) */
/* Transfer request completion */
/* */
/* CALLED BY */
/* */
/* Video Class */
/* */
/**************************************************************************/
VOID _ux_host_class_video_transfer_request_callback(UX_TRANSFER *transfer_request)
{
UX_HOST_CLASS_VIDEO *video;
UX_ENDPOINT *endpoint;
ULONG transfer_index;
/* Get the pointer to the video instance. */
video = (UX_HOST_CLASS_VIDEO *) transfer_request -> ux_transfer_request_class_instance;
/* Do a sanity check on the transfer request, if NULL something is wrong. */
if (video == UX_NULL)
return;
/* Check endpoint status. */
endpoint = video -> ux_host_class_video_isochronous_endpoint;
if (endpoint -> ux_endpoint_transfer_request.ux_transfer_request_completion_code != UX_TRANSFER_STATUS_PENDING)
return;
/* The caller's transfer request needs to be updated. */
transfer_index = video -> ux_host_class_video_transfer_request_end_index;
transfer_index++;
if (transfer_index == UX_HOST_CLASS_VIDEO_TRANSFER_REQUEST_COUNT)
transfer_index = 0;
/* Update the transfer index. */
video -> ux_host_class_video_transfer_request_end_index = transfer_index;
/* Call the completion routine. */
if (video -> ux_host_class_video_transfer_completion_function)
video -> ux_host_class_video_transfer_completion_function(transfer_request);
/* Return to caller. */
return;
}
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