1 /**************************************************************************/
2 /*                                                                        */
3 /*       Copyright (c) Microsoft Corporation. All rights reserved.        */
4 /*                                                                        */
5 /*       This software is licensed under the Microsoft Software License   */
6 /*       Terms for Microsoft Azure RTOS. Full text of the license can be  */
7 /*       found in the LICENSE file at https://aka.ms/AzureRTOS_EULA       */
8 /*       and in the root directory of this software.                      */
9 /*                                                                        */
10 /**************************************************************************/
11 
12 /**************************************************************************/
13 /**************************************************************************/
14 /**                                                                       */
15 /** USBX Component                                                        */
16 /**                                                                       */
17 /**   Device Video Class                                                  */
18 /**                                                                       */
19 /**************************************************************************/
20 /**************************************************************************/
21 
22 #define UX_SOURCE_CODE
23 
24 
25 /* Include necessary system files.  */
26 
27 #include "ux_api.h"
28 #include "ux_device_class_video.h"
29 #include "ux_device_stack.h"
30 
31 
32 #if defined(UX_DEVICE_STANDALONE)
33 /**************************************************************************/
34 /*                                                                        */
35 /*  FUNCTION                                               RELEASE        */
36 /*                                                                        */
37 /*    _ux_device_class_video_tasks_run                    PORTABLE C      */
38 /*                                                           6.2.0        */
39 /*  AUTHOR                                                                */
40 /*                                                                        */
41 /*    Chaoqiong Xiao, Microsoft Corporation                               */
42 /*                                                                        */
43 /*  DESCRIPTION                                                           */
44 /*                                                                        */
45 /*    This function is the background task of the video.                  */
46 /*                                                                        */
47 /*    It's for standalone mode.                                           */
48 /*                                                                        */
49 /*  INPUT                                                                 */
50 /*                                                                        */
51 /*    instance                              Pointer to video class        */
52 /*                                                                        */
53 /*  OUTPUT                                                                */
54 /*                                                                        */
55 /*    State machine status                                                */
56 /*    UX_STATE_EXIT                         Device not configured         */
57 /*    UX_STATE_IDLE                         No streaming transfer running */
58 /*    UX_STATE_WAIT                         Streaming transfer running    */
59 /*                                                                        */
60 /*  CALLS                                                                 */
61 /*                                                                        */
62 /*    (ux_device_class_video_stream_task_function)                        */
63 /*                                          Run stream task               */
64 /*                                                                        */
65 /*  CALLED BY                                                             */
66 /*                                                                        */
67 /*    USBX Device Stack                                                   */
68 /*                                                                        */
69 /*  RELEASE HISTORY                                                       */
70 /*                                                                        */
71 /*    DATE              NAME                      DESCRIPTION             */
72 /*                                                                        */
73 /*  10-31-2022     Chaoqiong Xiao           Initial Version 6.2.0         */
74 /*                                                                        */
75 /**************************************************************************/
_ux_device_class_video_tasks_run(VOID * instance)76 UINT _ux_device_class_video_tasks_run(VOID *instance)
77 {
78 UX_SLAVE_DEVICE                 *device;
79 UX_DEVICE_CLASS_VIDEO           *video;
80 UX_DEVICE_CLASS_VIDEO_STREAM    *stream;
81 ULONG                           stream_index;
82 UINT                            status;
83 ULONG                           running_count;
84 
85 
86     /* Get Video instance.  */
87     video = (UX_DEVICE_CLASS_VIDEO *) instance;
88 
89     /* Get the pointer to the device.  */
90     device =  &_ux_system_slave -> ux_system_slave_device;
91 
92     /* Check if the device is configured.  */
93     if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED)
94         return(UX_STATE_EXIT);
95 
96     /* Run video streaming tasks.  */
97     running_count = 0;
98     for (stream_index = 0;
99          stream_index < video -> ux_device_class_video_streams_nb;
100          stream_index ++)
101     {
102         stream = &video -> ux_device_class_video_streams[stream_index];
103         status = stream -> ux_device_class_video_stream_task_function(stream);
104         if (status == UX_STATE_EXIT)
105             return(status);
106         if (status == UX_STATE_WAIT)
107             running_count ++;
108     }
109 
110     /* Return state running.  */
111     return (running_count > 0) ? (UX_STATE_WAIT) : (UX_STATE_IDLE);
112 }
113 #endif
114