6ef14df09b
- add helper function video_find_config_name - add helper function configfs_parse_uvc_videodev With these helper functions it is possible to parse the configfs entry corresponding to the used videodev. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1304>
120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* ConfigFS Gadget device handling
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*
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* Copyright (C) 2018 Kieran Bingham
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*
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* Contact: Kieran Bingham <kieran.bingham@ideasonboard.com>
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*/
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#ifndef __CONFIGFS_H__
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#define __CONFIGFS_H__
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#include <stdint.h>
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/*
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* struct uvc_function_config_endpoint - Endpoint parameters
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* @bInterval: Transfer interval (interrupt and isochronous only)
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* @bMaxBurst: Transfer burst size (super-speed only)
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* @wMaxPacketSize: Maximum packet size (including the multiplier)
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*/
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struct uvc_function_config_endpoint
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{
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unsigned int bInterval;
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unsigned int bMaxBurst;
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unsigned int wMaxPacketSize;
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};
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/*
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* struct uvc_function_config_interface - Interface parameters
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* @bInterfaceNumber: Interface number
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*/
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struct uvc_function_config_interface
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{
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unsigned int bInterfaceNumber;
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};
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/*
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* struct uvc_function_config_control - Control interface parameters
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* @intf: Generic interface parameters
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*/
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struct uvc_function_config_control
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{
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struct uvc_function_config_interface intf;
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};
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/*
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* struct uvc_function_config_frame - Streaming frame parameters
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* @index: Frame index in the UVC descriptors
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* @width: Frame width in pixels
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* @height: Frame height in pixels
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* @num_intervals: Number of entries in the intervals array
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* @intervals: Array of frame intervals
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*/
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struct uvc_function_config_frame
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{
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unsigned int index;
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unsigned int width;
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unsigned int height;
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unsigned int num_intervals;
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unsigned int *intervals;
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unsigned int maxvideofbsize;
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};
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/*
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* struct uvc_function_config_format - Streaming format parameters
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* @index: Format index in the UVC descriptors
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* @guid: Format GUID
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* @fcc: V4L2 pixel format
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* @num_frames: Number of entries in the frames array
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* @frames: Array of frame descriptors
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*/
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struct uvc_function_config_format
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{
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unsigned int index;
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uint8_t guid[16];
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unsigned int fcc;
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unsigned int num_frames;
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struct uvc_function_config_frame *frames;
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};
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/*
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* struct uvc_function_config_streaming - Streaming interface parameters
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* @intf: Generic interface parameters
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* @ep: Endpoint parameters
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* @num_formats: Number of entries in the formats array
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* @formats: Array of format descriptors
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*/
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struct uvc_function_config_streaming
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{
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struct uvc_function_config_interface intf;
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struct uvc_function_config_endpoint ep;
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unsigned int num_formats;
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struct uvc_function_config_format *formats;
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};
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/*
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* struct uvc_function_config - UVC function configuration parameters
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* @video: Full path to the video device node
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* @udc: UDC name
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* @control: Control interface configuration
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* @streaming: Streaming interface configuration
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*/
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struct uvc_function_config
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{
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char *video;
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char *udc;
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struct uvc_function_config_control control;
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struct uvc_function_config_streaming streaming;
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};
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struct uvc_function_config *configfs_parse_uvc_function (const char *function);
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void configfs_free_uvc_function (struct uvc_function_config *fc);
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struct uvc_function_config *configfs_parse_uvc_videodev (int fd,
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const char *video);
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#endif
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