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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 */
/** */
/** Pictbridge Application */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_pictbridge.h"
#include "ux_host_class_pima.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_pictbridge_dpshost_thread PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This is the Pictbridge dpshost thread that receives and execute */
/* notifications from the dpsclient. */
/* */
/* INPUT */
/* */
/* pictbridge Pictbridge instance */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* */
/* CALLED BY */
/* */
/* user application */
/* */
/**************************************************************************/
VOID _ux_pictbridge_dpshost_thread(ULONG parameter)
{
UX_PICTBRIDGE *pictbridge;
UX_PICTBRIDGE_EVENT *pictbridge_event;
ULONG actual_flags;
UINT status;
/* Cast the parameter passed in the thread into the pictbridge pointer. */
UX_THREAD_EXTENSION_PTR_GET(pictbridge, UX_PICTBRIDGE, parameter)
/* Loop forever waiting for changes signaled through the semaphore. */
while (1)
{
/* Wait for the semaphore to be put by the root hub or a regular hub. */
_ux_system_semaphore_get_norc(&pictbridge -> ux_pictbridge_notification_semaphore, UX_WAIT_FOREVER);
/* Check if there is an event. Normally there should be at least one since we got awaken. */
if (pictbridge -> ux_pictbridge_event_array_tail != pictbridge -> ux_pictbridge_event_array_head)
{
/* Get the current event tail. */
pictbridge_event = pictbridge -> ux_pictbridge_event_array_tail;
/* Compute the next entry in the event array. */
if ((pictbridge -> ux_pictbridge_event_array_tail + 1) == pictbridge -> ux_pictbridge_event_array_end)
/* Start at the beginning of the list. */
pictbridge -> ux_pictbridge_event_array_tail = pictbridge -> ux_pictbridge_event_array;
else
/* Point to the next entry in the event array. */
pictbridge -> ux_pictbridge_event_array_tail = pictbridge -> ux_pictbridge_event_array_tail + 1;
/* Analyze the event type. */
switch (pictbridge_event -> ux_pictbridge_event_code)
{
/* The DSC client is informing us that an object is ready. */
case UX_PICTBRIDGE_EC_OBJECT_ADDED :
case UX_PICTBRIDGE_EC_REQUEST_OBJECT_TRANSFER :
/* Check the state machine. */
if (pictbridge -> ux_pictbridge_host_client_state_machine != UX_PICTBRIDGE_STATE_MACHINE_IDLE)
{
/* Set the state machine to Client Request pending. */
pictbridge -> ux_pictbridge_host_client_state_machine |= UX_PICTBRIDGE_STATE_MACHINE_CLIENT_REQUEST_PENDING;
/* Wait for the host pending request to be completed. */
status = _ux_system_event_flags_get(&pictbridge -> ux_pictbridge_event_flags_group,
UX_PICTBRIDGE_EVENT_FLAG_STATE_MACHINE_READY,
UX_AND_CLEAR, &actual_flags, UX_PICTBRIDGE_EVENT_TIMEOUT);
/* Reset the state machine to not Host Request pending. */
pictbridge -> ux_pictbridge_host_client_state_machine &= (UINT)~UX_PICTBRIDGE_STATE_MACHINE_CLIENT_REQUEST_PENDING;
/* Check status. */
if (status != UX_SUCCESS)
break;
/* Status good means flag match, no need to check variable again, mark it unused. */
(void)actual_flags;
}
/* Change the state machine to client request being executed. */
pictbridge -> ux_pictbridge_host_client_state_machine |= UX_PICTBRIDGE_STATE_MACHINE_CLIENT_REQUEST;
/* Obtain the object and execute the XML request script. */
_ux_pictbridge_dpshost_object_get(pictbridge, pictbridge_event -> ux_pictbridge_event_parameter_1);
/* Do we have a pending client event ? */
if (pictbridge -> ux_pictbridge_host_client_state_machine & UX_PICTBRIDGE_STATE_MACHINE_CLIENT_REQUEST_PENDING)
{
/* Yes, so we need to set the event that advertise the completion of the host request. */
status = _ux_system_event_flags_set_rc(&pictbridge -> ux_pictbridge_event_flags_group,
UX_PICTBRIDGE_EVENT_FLAG_STATE_MACHINE_READY,
UX_AND);
/* Check status. */
if (status != UX_SUCCESS)
break;
}
/* Change state machine to idle. */
pictbridge -> ux_pictbridge_host_client_state_machine &= (UINT)~UX_PICTBRIDGE_STATE_MACHINE_CLIENT_REQUEST;
/* Check to see if we had a configureprint service request. */
if (pictbridge -> ux_pictbridge_input_request == UX_PICTBRIDGE_IR_GET_CAPABILITY)
{
/* Parse the tag code that was memorized during the input. */
if (pictbridge -> ux_pictbridge_input_tags & UX_PICTBRIDGE_IR_GC_CROPPINGS)
/* We did have a request, notify the camera of our status. */
_ux_pictbridge_dpshost_input_object_send(pictbridge, UX_PICTBRIDGE_IR_NOTIFY_DEVICE_STATUS);
}
break;
case UX_PICTBRIDGE_EC_START_JOB :
/* We have received an order to print one or more picture. */
_ux_pictbridge_dpshost_startjob(pictbridge);
break;
default :
break;
}
}
}
}
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