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ux_host_class_video: Save clock frequency during video channel start #123

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ux_host_class_video: Save clock frequency during video channel start #123

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1 change: 1 addition & 0 deletions common/usbx_host_classes/inc/ux_host_class_video.h
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Original file line number Diff line number Diff line change
Expand Up @@ -542,6 +542,7 @@ typedef struct UX_HOST_CLASS_VIDEO_STRUCT
UCHAR *ux_host_class_video_current_frame_address;
ULONG ux_host_class_video_current_frame_interval;
ULONG ux_host_class_video_current_max_payload_size;
ULONG ux_host_class_video_current_clock_frequency;
UX_TRANSFER ux_host_class_video_transfer_requests[UX_HOST_CLASS_VIDEO_TRANSFER_REQUEST_COUNT];
ULONG ux_host_class_video_transfer_request_start_index;
ULONG ux_host_class_video_transfer_request_end_index;
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9 changes: 8 additions & 1 deletion common/usbx_host_classes/src/ux_host_class_video_channel_start.c
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Original file line number Diff line number Diff line change
Expand Up @@ -108,6 +108,7 @@ UX_ENDPOINT *endpoint;
ULONG endpoint_index;
UINT streaming_interface;
UINT max_payload_size;
ULONG clock_frequency;


/* Protect thread reentry to this instance. */
Expand Down Expand Up @@ -202,6 +203,9 @@ UINT max_payload_size;
max_payload_size = video_parameter -> ux_host_class_video_parameter_channel_bandwidth_selection;
}

/* Save clock frequency of the video stream */
clock_frequency = _ux_utility_long_get(control_buffer + UX_HOST_CLASS_VIDEO_PROBE_COMMIT_CLOCK_FREQUENCY);

/* Search for the non zero alternate setting of the video stream. */
status = _ux_host_class_video_alternate_setting_locate(video, max_payload_size, &alternate_setting);

Expand Down Expand Up @@ -257,7 +261,10 @@ UINT max_payload_size;
It's not exceeding endpoint bandwidth since the interface alternate
setting is located by max payload size. */
video -> ux_host_class_video_current_max_payload_size = max_payload_size;


/* Save the clock frequecny */
video -> ux_host_class_video_current_clock_frequency = clock_frequency;

/* Free all used resources. */
_ux_utility_memory_free(control_buffer);

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