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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_deactivate PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when this instance of the video has been */
/* removed from the bus either directly or indirectly. The iso pipes */
/* will be destroyed and the instanced removed. */
/* */
/* INPUT */
/* */
/* command Pointer to command */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_class_instance_destroy Destroy class instance */
/* _ux_host_stack_endpoint_transfer_abort */
/* Abort outstanding transfer */
/* _ux_host_semaphore_get Get semaphore */
/* _ux_host_semaphore_delete Delete semaphore */
/* _ux_utility_memory_free Release memory block */
/* _ux_utility_thread_schedule_other Schedule other threads */
/* */
/* CALLED BY */
/* */
/* Video Class */
/* */
/**************************************************************************/
UINT _ux_host_class_video_deactivate(UX_HOST_CLASS_COMMAND *command)
{
UX_HOST_CLASS_VIDEO *video;
UINT status;
/* Get the instance for this class. */
video= (UX_HOST_CLASS_VIDEO *) command -> ux_host_class_command_instance;
/* The video is being shut down. */
video -> ux_host_class_video_state = UX_HOST_CLASS_INSTANCE_SHUTDOWN;
/* Protect thread reentry to this instance. */
status = _ux_host_semaphore_get(&video -> ux_host_class_video_semaphore, UX_WAIT_FOREVER);
if (status != UX_SUCCESS)
/* Return error. */
return(status);
/* We need to abort transactions on the iso out pipe. */
if (video -> ux_host_class_video_isochronous_endpoint)
_ux_host_stack_endpoint_transfer_abort(video -> ux_host_class_video_isochronous_endpoint);
/* The enumeration thread needs to sleep a while to allow the application or the class that may be using
endpoints to exit properly. */
_ux_host_thread_schedule_other(UX_THREAD_PRIORITY_ENUM);
/* Free descriptor memory. */
if (video -> ux_host_class_video_configuration_descriptor)
_ux_utility_memory_free(video -> ux_host_class_video_configuration_descriptor);
/* Destroy the instance. */
_ux_host_stack_class_instance_destroy(video -> ux_host_class_video_class, (VOID *) video);
/* Destroy the semaphores. */
_ux_host_semaphore_delete(&video -> ux_host_class_video_semaphore);
_ux_host_semaphore_delete(&video -> ux_host_class_video_semaphore_control_request);
/* Before we free the device resources, we need to inform the application
that the device is removed. */
if (_ux_system_host -> ux_system_host_change_function != UX_NULL)
{
/* Inform the application the device is removed. */
_ux_system_host -> ux_system_host_change_function(UX_DEVICE_REMOVAL, video -> ux_host_class_video_class, (VOID *) video);
}
/* If trace is enabled, insert this event into the trace buffer. */
//UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_VIDEO_DEACTIVATE, video, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
//UX_TRACE_OBJECT_UNREGISTER(video);
/* Free the video instance memory. */
_ux_utility_memory_free(video);
/* Return successful completion. */
return(UX_SUCCESS);
}
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