1 /***************************************************************************
2  * Copyright (c) 2024 Microsoft Corporation
3  *
4  * This program and the accompanying materials are made available under the
5  * terms of the MIT License which is available at
6  * https://opensource.org/licenses/MIT.
7  *
8  * SPDX-License-Identifier: MIT
9  **************************************************************************/
10 
11 
12 /**************************************************************************/
13 /**************************************************************************/
14 /**                                                                       */
15 /** USBX Component                                                        */
16 /**                                                                       */
17 /**   Audio Class                                                         */
18 /**                                                                       */
19 /**************************************************************************/
20 /**************************************************************************/
21 
22 
23 /* Include necessary system files.  */
24 
25 #define UX_SOURCE_CODE
26 
27 #include "ux_api.h"
28 #include "ux_host_class_audio.h"
29 #include "ux_host_stack.h"
30 
31 
32 #if defined(UX_HOST_CLASS_AUDIO_FEEDBACK_SUPPORT)
33 /**************************************************************************/
34 /*                                                                        */
35 /*  FUNCTION                                               RELEASE        */
36 /*                                                                        */
37 /*    _ux_host_class_audio_feedback_transfer_completed    PORTABLE C      */
38 /*                                                           6.1.12       */
39 /*  AUTHOR                                                                */
40 /*                                                                        */
41 /*    Chaoqiong Xiao, Microsoft Corporation                               */
42 /*                                                                        */
43 /*  DESCRIPTION                                                           */
44 /*                                                                        */
45 /*    This function receives a completion call back on a isoch transfer   */
46 /*    request.                                                            */
47 /*                                                                        */
48 /*  INPUT                                                                 */
49 /*                                                                        */
50 /*    transfer_request                      Pointer to transfer request   */
51 /*                                                                        */
52 /*  OUTPUT                                                                */
53 /*                                                                        */
54 /*    None                                                                */
55 /*                                                                        */
56 /*  CALLS                                                                 */
57 /*                                                                        */
58 /*                                                                        */
59 /*  CALLED BY                                                             */
60 /*                                                                        */
61 /*    HCD                                                                 */
62 /*                                                                        */
63 /*  RELEASE HISTORY                                                       */
64 /*                                                                        */
65 /*    DATE              NAME                      DESCRIPTION             */
66 /*                                                                        */
67 /*  07-29-2022     Chaoqiong Xiao           Initial Version 6.1.12        */
68 /*                                                                        */
69 /**************************************************************************/
_ux_host_class_audio_feedback_transfer_completed(UX_TRANSFER * transfer_request)70 VOID  _ux_host_class_audio_feedback_transfer_completed(UX_TRANSFER *transfer_request)
71 {
72 UX_HOST_CLASS_AUDIO         *audio;
73 UX_ENDPOINT                 *endpoint;
74 ULONG                       endpoint_dir;
75 
76     /* Check status.  */
77     if (transfer_request -> ux_transfer_request_completion_code != UX_SUCCESS)
78         return;
79 
80     /* Sync with feedback buffer.  */
81     audio = (UX_HOST_CLASS_AUDIO *) transfer_request -> ux_transfer_request_class_instance;
82     endpoint = transfer_request -> ux_transfer_request_endpoint;
83     endpoint_dir = endpoint -> ux_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION;
84     if (endpoint_dir == UX_ENDPOINT_IN)
85     {
86         _ux_utility_memory_copy(audio -> ux_host_class_audio_feedback_buffer,
87                                 transfer_request -> ux_transfer_request_data_pointer,
88                                 sizeof(audio -> ux_host_class_audio_feedback_buffer)); /* Use case of memcpy is verified. */
89     }
90 
91     /* Issue another request again.  */
92     _ux_host_stack_transfer_request(transfer_request);
93 }
94 #endif
95