/***************************************************************************
 * 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_buffer_add            PORTABLE C      */
/*                                                           6.3.0        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function adds a buffer for video transfer requests.            */
/*                                                                        */
/*    Note check ux_host_class_video_max_payload_get to see minimum       */
/*    recommended buffer size.                                            */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    video                                 Pointer to video class        */
/*    buffer                                Pointer to data buffer        */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_host_stack_class_instance_verify  Verify instance is valid      */
/*    _ux_host_stack_transfer_request       Process transfer request      */
/*    _ux_host_semaphore_get                Get semaphore                 */
/*    _ux_host_semaphore_put                Release semaphore             */
/*    _ux_system_error_handler              Log system error              */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application                                                         */
/*                                                                        */
/**************************************************************************/
UINT  _ux_host_class_video_transfer_buffer_add(UX_HOST_CLASS_VIDEO *video, UCHAR* buffer)
{

UINT            status;
UX_TRANSFER     *transfer_request;
UX_ENDPOINT     *endpoint;
ULONG           transfer_index;
ULONG           packet_size;

    /* Ensure the instance is valid.  */
    if (_ux_host_stack_class_instance_verify(_ux_system_host_class_video_name, (VOID *) video) != UX_SUCCESS)
    {

        /* Error trap. */
        _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_HOST_CLASS_INSTANCE_UNKNOWN);

        /* If trace is enabled, insert this event into the trace buffer.  */
    //    UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_INSTANCE_UNKNOWN, video, 0, 0, UX_TRACE_ERRORS, 0, 0)

        return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
    }

    /* 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(status);

    /* Get endpoint.  */
    endpoint = video -> ux_host_class_video_isochronous_endpoint;

    /* Ensure we have a selected interface that allows isoch transmission.  */
    if ((endpoint == UX_NULL) ||
        (endpoint -> ux_endpoint_descriptor.wMaxPacketSize == 0))
    {

        /* Unprotect thread reentry to this instance.  */
        _ux_host_semaphore_put(&video -> ux_host_class_video_semaphore);

        /* Error trap. */
        _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_HOST_CLASS_VIDEO_WRONG_INTERFACE);

        /* Return error status.  */
        return(UX_HOST_CLASS_VIDEO_WRONG_INTERFACE);
    }

    transfer_index = video->ux_host_class_video_transfer_request_start_index;
    transfer_index ++;
    if (transfer_index == UX_HOST_CLASS_VIDEO_TRANSFER_REQUEST_COUNT)
        transfer_index = 0;
    if (transfer_index == video->ux_host_class_video_transfer_request_end_index)
    {

        /* Unprotect thread reentry to this instance.  */
        _ux_host_semaphore_put(&video -> ux_host_class_video_semaphore);

        /* Return error status.  */
        return(UX_MEMORY_ARRAY_FULL);
    }

    transfer_request = &video->ux_host_class_video_transfer_requests[video->ux_host_class_video_transfer_request_start_index];
    video->ux_host_class_video_transfer_request_start_index = transfer_index;

    /* Select the direction. We do this by taking the endpoint direction.  */
    transfer_request -> ux_transfer_request_type =  endpoint ->
                ux_endpoint_descriptor.bEndpointAddress & UX_REQUEST_DIRECTION;

    /* Calculate packet size.  */
    packet_size = video -> ux_host_class_video_current_max_payload_size;

    /* Fill the transfer request with all the required fields.  */
    transfer_request -> ux_transfer_request_endpoint =             endpoint;
    transfer_request -> ux_transfer_request_data_pointer =         buffer;
    transfer_request -> ux_transfer_request_requested_length =     packet_size;
    transfer_request -> ux_transfer_request_completion_function =  _ux_host_class_video_transfer_request_callback;
    transfer_request -> ux_transfer_request_class_instance =       video;

    /* Add single transfer.  */
    transfer_request -> ux_transfer_request_next_transfer_request = UX_NULL;

    /* Set endpoint to pending state, for callback and abort to check.  */
    endpoint -> ux_endpoint_transfer_request.ux_transfer_request_completion_code = UX_TRANSFER_STATUS_PENDING;

    /* Transfer the transfer request.  */
    status =  _ux_host_stack_transfer_request(transfer_request);

    /* Unprotect thread reentry to this instance.  */
    _ux_host_semaphore_put(&video -> ux_host_class_video_semaphore);

    /* Return completion status.  */
    return(status);
}

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _uxe_host_class_video_transfer_buffer_add           PORTABLE C      */
/*                                                           6.3.0        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Yajun Xia, Microsoft Corporation                                    */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function checks errors in video transfer buffer add function   */
/*    call.                                                               */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    video                                 Pointer to video class        */
/*    buffer                                Pointer to data buffer        */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_host_class_video_transfer_buffer_add                            */
/*                                          video transfer buffer add     */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application                                                         */
/*                                                                        */
/**************************************************************************/
UINT  _uxe_host_class_video_transfer_buffer_add(UX_HOST_CLASS_VIDEO *video, UCHAR* buffer)
{

    /* Sanity checks.  */
    if ((video == UX_NULL) || (buffer == UX_NULL))
        return(UX_INVALID_PARAMETER);

    /* Call actual video transfer buffer add function.  */
    return(_ux_host_class_video_transfer_buffer_add(video, buffer));
}