Split UVC gadget into a library and test application

Split the project into a UVC gadget library and a test application. To
avoid rolling out a custom build system, switch to CMake.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 0 insertions, 339 deletions

diff --git a/v4l2.h b/v4l2.h
deleted file mode 100644
index 8d7b3c5..0000000
--- a/v4l2.h
+++ /dev/null
@@ -1,339 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-/*
- * V4L2 Devices
- *
- * Copyright (C) 2018 Laurent Pinchart
- *
- * This file originally comes from the omap3-isp-live project
- * (git://git.ideasonboard.org/omap3-isp-live.git)
- *
- * Copyright (C) 2010-2011 Ideas on board SPRL
- *
- * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
- */
-#ifndef __V4L2_H
-#define __V4L2_H
-
-#include <linux/videodev2.h>
-#include <stdint.h>
-
-#include "list.h"
-#include "video-buffers.h"
-
-struct v4l2_device
-{
-	int fd;
-	char *name;
-
-	enum v4l2_buf_type type;
-	enum v4l2_memory memtype;
-
-	struct list_entry formats;
-	struct v4l2_pix_format format;
-	struct v4l2_rect crop;
-
-	struct video_buffer_set buffers;
-};
-
-/*
- * v4l2_open - Open a V4L2 device
- * @devname: Name (including path) of the device node
- *
- * Open the V4L2 device referenced by @devname for video capture or display in
- * non-blocking mode.
- *
- * If the device can be opened, query its capabilities and enumerates frame
- * formats, sizes and intervals.
- *
- * Return a pointer to a newly allocated v4l2_device structure instance on
- * success and NULL on failure. The returned pointer must be freed with
- * v4l2_close when the device isn't needed anymore.
- */
-struct v4l2_device *v4l2_open(const char *devname);
-
-/*
- * v4l2_close - Close a V4L2 device
- * @dev: Device instance
- *
- * Close the device instance given as argument and free allocated resources.
- * Access to the device instance is forbidden after this function returns.
- */
-void v4l2_close(struct v4l2_device *dev);
-
-/*
- * v4l2_get_format - Retrieve the current pixel format
- * @dev: Device instance
- * @format: Pixel format structure to be filled
- *
- * Query the device to retrieve the current pixel format and frame size and fill
- * the @format structure.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_get_format(struct v4l2_device *dev, struct v4l2_pix_format *format);
-
-/*
- * v4l2_set_format - Set the pixel format
- * @dev: Device instance
- * @format: Pixel format structure to be set
- *
- * Set the pixel format and frame size stored in @format. The device can modify
- * the requested format and size, in which case the @format structure will be
- * updated to reflect the modified settings.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_set_format(struct v4l2_device *dev, struct v4l2_pix_format *format);
-
-/*
- * v4l2_get_crop - Retrieve the current crop rectangle
- * @dev: Device instance
- * @rect: Crop rectangle structure to be filled
- *
- * Query the device to retrieve the current crop rectangle and fill the @rect
- * structure.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_get_crop(struct v4l2_device *dev, struct v4l2_rect *rect);
-
-/*
- * v4l2_set_crop - Set the crop rectangle
- * @dev: Device instance
- * @rect: Crop rectangle structure to be set
- *
- * Set the crop rectangle stored in @rect. The device can modify the requested
- * rectangle, in which case the @rect structure will be updated to reflect the
- * modified settings.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_set_crop(struct v4l2_device *dev, struct v4l2_rect *rect);
-
-/*
- * v4l2_alloc_buffers - Allocate buffers for video frames
- * @dev: Device instance
- * @memtype: Type of buffers
- * @nbufs: Number of buffers to allocate
- *
- * Request the driver to allocate @nbufs buffers. The driver can modify the
- * number of buffers depending on its needs. The number of allocated buffers
- * will be stored in the @dev->buffers.nbufs field.
- *
- * When @memtype is set to V4L2_MEMORY_MMAP the buffers are allocated by the
- * driver. They can then be mapped to userspace by calling v4l2_mmap_buffers().
- * When @memtype is set to V4L2_MEMORY_DMABUF the driver only allocates buffer
- * objects and relies on the application to provide memory storage for video
- * frames.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_alloc_buffers(struct v4l2_device *dev, enum v4l2_memory memtype,
-		       unsigned int nbufs);
-
-/*
- * v4l2_free_buffers - Free buffers
- * @dev: Device instance
- *
- * Free buffers previously allocated by v4l2_alloc_buffers(). If the buffers
- * have been allocated with the V4L2_MEMORY_DMABUF memory type only the buffer
- * objects are freed, and the caller is responsible for freeing the video frames
- * memory if required.
- *
- * When successful this function sets the @dev->buffers.nbufs field to zero.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_free_buffers(struct v4l2_device *dev);
-
-/*
- * v4l2_export_buffers - Export buffers as dmabuf objects
- * @dev: Device instance
- *
- * Export all the buffers previously allocated by v4l2_alloc_buffers() as dmabuf
- * objects. The dmabuf objects handles can be accessed through the dmabuf field
- * of each entry in the @dev::buffers array.
- *
- * The dmabuf objects handles will be automatically closed when the buffers are
- * freed with v4l2_free_buffers().
- *
- * This function can only be called when buffers have been allocated with the
- * memory type set to V4L2_MEMORY_MMAP. If the memory type is different, or if
- * no buffers have been allocated, it will return -EINVAL.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_export_buffers(struct v4l2_device *dev);
-
-/*
- * v4l2_import_buffers - Import buffer backing store as dmabuf objects
- * @dev: Device instance
- * @buffers: Buffers to be imported
- *
- * Import the dmabuf objects from @buffers as backing store for the device
- * buffers previously allocated by v4l2_alloc_buffers().
- *
- * The dmabuf file handles are duplicated and stored in the dmabuf field of the
- * @dev::buffers array. The handles from the @buffers set can thus be closed
- * independently without impacting usage of the imported dmabuf objects. The
- * duplicated file handles will be automatically closed when the buffers are
- * freed with v4l2_free_buffers().
- *
- * This function can only be called when buffers have been allocated with the
- * memory type set to V4L2_MEMORY_DMABUF. If the memory type is different, if no
- * buffers have been allocated, or if the number of allocated buffers is larger
- * than @buffers->nbufs, it will return -EINVAL.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_import_buffers(struct v4l2_device *dev,
-			const struct video_buffer_set *buffers);
-
-/*
- * v4l2_mmap_buffers - Map buffers to application memory space
- * @dev: Device instance
- *
- * Map all the buffers previously allocated by v4l2_alloc_buffers() to the
- * application memory space. The buffer memory can be accessed through the mem
- * field of each entry in the @dev::buffers array.
- *
- * Buffers will be automatically unmapped when freed with v4l2_free_buffers().
- *
- * This function can only be called when buffers have been allocated with the
- * memory type set to V4L2_MEMORY_MMAP. If the memory type is different, or if
- * no buffers have been allocated, it will return -EINVAL.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_mmap_buffers(struct v4l2_device *dev);
-
-/*
- * v4l2_queue_buffer - Queue a buffer for video capture/output
- * @dev: Device instance
- * @buffer: Buffer to be queued
- *
- * Queue the buffer identified by @buffer for video capture or output, depending
- * on the device type.
- *
- * The caller must initialize the @buffer::index field with the index of the
- * buffer to be queued. The index is zero-based and must be lower than the
- * number of allocated buffers.
- *
- * For V4L2_MEMORY_DMABUF buffers, the caller must initialize the @buffer::dmabuf
- * field with the address of the video frame memory, and the @buffer:length
- * field with its size in bytes. For optimal performances the address and length
- * should be identical between v4l2_queue_buffer() calls for a given buffer
- * index.
- *
- * For video output, the caller must initialize the @buffer::bytesused field
- * with the size of video data. The value should differ from the buffer length
- * for variable-size video formats only.
- *
- * Upon successful return the buffer ownership is transferred to the driver. The
- * caller must not touch video memory for that buffer before calling
- * v4l2_dequeue_buffer(). Attempting to queue an already queued buffer will
- * fail.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_queue_buffer(struct v4l2_device *dev, struct video_buffer *buffer);
-
-/*
- * v4l2_dequeue_buffer - Dequeue the next buffer
- * @dev: Device instance
- * @buffer: Dequeued buffer data to be filled
- *
- * Dequeue the next buffer processed by the driver and fill all fields in
- * @buffer. 
- *
- * This function does not block. If no buffer is ready it will return
- * immediately with -EAGAIN.
- *
- * If an error occured during video capture or display, the @buffer::error field
- * is set to true. Depending on the device the video data can be partly
- * corrupted or complete garbage.
- *
- * Once dequeued the buffer ownership is transferred to the caller. Video memory
- * for that buffer can be safely read from and written to.
- *
- * Return 0 on success or a negative error code on failure. An error that
- * results in @buffer:error being set is not considered as a failure condition
- * for the purpose of the return value.
- */
-int v4l2_dequeue_buffer(struct v4l2_device *dev, struct video_buffer *buffer);
-
-/*
- * v4l2_stream_on - Start video streaming
- * @dev: Device instance
- *
- * Start video capture or output on the device. For video output devices at
- * least one buffer must be queued before starting the stream.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_stream_on(struct v4l2_device *dev);
-
-/*
- * v4l2_stream_off - Stop video streaming
- * @dev: Device instance
- *
- * Stop video capture or output on the device. Upon successful return ownership
- * of all buffers is returned to the caller.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_stream_off(struct v4l2_device *dev);
-
-/*
- * v4l2_get_control - Read the value of a control
- * @dev: Device instance
- * @id: Control ID
- * @value: Control value to be filled
- *
- * Retrieve the current value of control @id and store it in @value.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_get_control(struct v4l2_device *dev, unsigned int id, int32_t *value);
-
-/*
- * v4l2_set_control - Write the value of a control
- * @dev: Device instance
- * @id: Control ID
- * @value: Control value
- *
- * Set control @id to @value. The device is allowed to modify the requested
- * value, in which case @value is updated to the modified value.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_set_control(struct v4l2_device *dev, unsigned int id, int32_t *value);
-
-/*
- * v4l2_get_controls - Read the value of multiple controls
- * @dev: Device instance
- * @count: Number of controls
- * @ctrls: Controls to be read
- *
- * Retrieve the current value of controls identified by @ctrls.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_get_controls(struct v4l2_device *dev, unsigned int count,
-		      struct v4l2_ext_control *ctrls);
-
-/*
- * v4l2_set_controls - Write the value of multiple controls
- * @dev: Device instance
- * @count: Number of controls
- * @ctrls: Controls to be written
- *
- * Set controls identified by @ctrls. The device is allowed to modify the
- * requested values, in which case @ctrls is updated to the modified value.
- *
- * Return 0 on success or a negative error code on failure.
- */
-int v4l2_set_controls(struct v4l2_device *dev, unsigned int count,
-		      struct v4l2_ext_control *ctrls);
-
-#endif