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, 395 deletions

diff --git a/uvc.c b/uvc.c
deleted file mode 100644
index 81d1760..0000000
--- a/uvc.c
+++ /dev/null
@@ -1,395 +0,0 @@
-/*
- * UVC protocol handling
- *
- * Copyright (C) 2010 Ideas on board SPRL <laurent.pinchart@ideasonboard.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- */
-
-#include <errno.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/g_uvc.h>
-#include <linux/usb/video.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-
-#include "configfs.h"
-#include "events.h"
-#include "stream.h"
-#include "tools.h"
-#include "uvc.h"
-#include "v4l2.h"
-
-struct uvc_device
-{
-	struct v4l2_device *vdev;
-
-	struct uvc_stream *stream;
-	struct uvc_function_config *fc;
-
-	struct uvc_streaming_control probe;
-	struct uvc_streaming_control commit;
-
-	int control;
-
-	unsigned int fcc;
-	unsigned int width;
-	unsigned int height;
-	unsigned int maxsize;
-};
-
-struct uvc_device *uvc_open(const char *devname, struct uvc_stream *stream)
-{
-	struct uvc_device *dev;
-
-	dev = malloc(sizeof *dev);
-	if (dev == NULL)
-		return NULL;
-
-	memset(dev, 0, sizeof *dev);
-	dev->stream = stream;
-
-	dev->vdev = v4l2_open(devname);
-	if (dev->vdev == NULL) {
-		free(dev);
-		return NULL;
-	}
-
-	return dev;
-}
-
-void uvc_close(struct uvc_device *dev)
-{
-	v4l2_close(dev->vdev);
-	dev->vdev = NULL;
-
-	free(dev);
-}
-
-/* ---------------------------------------------------------------------------
- * Request processing
- */
-
-static void
-uvc_fill_streaming_control(struct uvc_device *dev,
-			   struct uvc_streaming_control *ctrl,
-			   int iformat, int iframe, unsigned int ival)
-{
-	const struct uvc_function_config_format *format;
-	const struct uvc_function_config_frame *frame;
-	unsigned int i;
-
-	/*
-	 * Restrict the iformat, iframe and ival to valid values. Negative
-	 * values for iformat or iframe will result in the maximum valid value
-	 * being selected.
-	 */
-        iformat = clamp((unsigned int)iformat, 1U,
-                        dev->fc->streaming.num_formats);
-	format = &dev->fc->streaming.formats[iformat-1];
-
-	iframe = clamp((unsigned int)iframe, 1U, format->num_frames);
-	frame = &format->frames[iframe-1];
-
-	for (i = 0; i < frame->num_intervals; ++i) {
-		if (ival <= frame->intervals[i]) {
-			ival = frame->intervals[i];
-			break;
-		}
-	}
-
-	if (i == frame->num_intervals)
-		ival = frame->intervals[frame->num_intervals-1];
-
-	memset(ctrl, 0, sizeof *ctrl);
-
-	ctrl->bmHint = 1;
-	ctrl->bFormatIndex = iformat;
-	ctrl->bFrameIndex = iframe ;
-	ctrl->dwFrameInterval = ival;
-
-	switch (format->fcc) {
-	case V4L2_PIX_FMT_YUYV:
-		ctrl->dwMaxVideoFrameSize = frame->width * frame->height * 2;
-		break;
-	case V4L2_PIX_FMT_MJPEG:
-		ctrl->dwMaxVideoFrameSize = dev->maxsize;
-		break;
-	}
-
-	ctrl->dwMaxPayloadTransferSize = dev->fc->streaming.ep.wMaxPacketSize;
-	ctrl->bmFramingInfo = 3;
-	ctrl->bPreferedVersion = 1;
-	ctrl->bMaxVersion = 1;
-}
-
-static void
-uvc_events_process_standard(struct uvc_device *dev,
-			    const struct usb_ctrlrequest *ctrl,
-			    struct uvc_request_data *resp)
-{
-	printf("standard request\n");
-	(void)dev;
-	(void)ctrl;
-	(void)resp;
-}
-
-static void
-uvc_events_process_control(struct uvc_device *dev, uint8_t req, uint8_t cs,
-			   struct uvc_request_data *resp)
-{
-	printf("control request (req %02x cs %02x)\n", req, cs);
-	(void)dev;
-	(void)resp;
-}
-
-static void
-uvc_events_process_streaming(struct uvc_device *dev, uint8_t req, uint8_t cs,
-			     struct uvc_request_data *resp)
-{
-	struct uvc_streaming_control *ctrl;
-
-	printf("streaming request (req %02x cs %02x)\n", req, cs);
-
-	if (cs != UVC_VS_PROBE_CONTROL && cs != UVC_VS_COMMIT_CONTROL)
-		return;
-
-	ctrl = (struct uvc_streaming_control *)&resp->data;
-	resp->length = sizeof *ctrl;
-
-	switch (req) {
-	case UVC_SET_CUR:
-		dev->control = cs;
-		resp->length = 34;
-		break;
-
-	case UVC_GET_CUR:
-		if (cs == UVC_VS_PROBE_CONTROL)
-			memcpy(ctrl, &dev->probe, sizeof *ctrl);
-		else
-			memcpy(ctrl, &dev->commit, sizeof *ctrl);
-		break;
-
-	case UVC_GET_MIN:
-	case UVC_GET_MAX:
-	case UVC_GET_DEF:
-		uvc_fill_streaming_control(dev, ctrl, req == UVC_GET_MAX ? -1 : 1,
-					   req == UVC_GET_MAX ? -1 : 1, 0);
-		break;
-
-	case UVC_GET_RES:
-		memset(ctrl, 0, sizeof *ctrl);
-		break;
-
-	case UVC_GET_LEN:
-		resp->data[0] = 0x00;
-		resp->data[1] = 0x22;
-		resp->length = 2;
-		break;
-
-	case UVC_GET_INFO:
-		resp->data[0] = 0x03;
-		resp->length = 1;
-		break;
-	}
-}
-
-static void
-uvc_events_process_class(struct uvc_device *dev,
-			 const struct usb_ctrlrequest *ctrl,
-			 struct uvc_request_data *resp)
-{
-	unsigned int interface = ctrl->wIndex & 0xff;
-
-	if ((ctrl->bRequestType & USB_RECIP_MASK) != USB_RECIP_INTERFACE)
-		return;
-
-	if (interface == dev->fc->control.intf.bInterfaceNumber)
-		uvc_events_process_control(dev, ctrl->bRequest, ctrl->wValue >> 8, resp);
-	else if (interface == dev->fc->streaming.intf.bInterfaceNumber)
-		uvc_events_process_streaming(dev, ctrl->bRequest, ctrl->wValue >> 8, resp);
-}
-
-static void
-uvc_events_process_setup(struct uvc_device *dev,
-			 const struct usb_ctrlrequest *ctrl,
-			 struct uvc_request_data *resp)
-{
-	dev->control = 0;
-
-	printf("bRequestType %02x bRequest %02x wValue %04x wIndex %04x "
-		"wLength %04x\n", ctrl->bRequestType, ctrl->bRequest,
-		ctrl->wValue, ctrl->wIndex, ctrl->wLength);
-
-	switch (ctrl->bRequestType & USB_TYPE_MASK) {
-	case USB_TYPE_STANDARD:
-		uvc_events_process_standard(dev, ctrl, resp);
-		break;
-
-	case USB_TYPE_CLASS:
-		uvc_events_process_class(dev, ctrl, resp);
-		break;
-
-	default:
-		break;
-	}
-}
-
-static void
-uvc_events_process_data(struct uvc_device *dev,
-			const struct uvc_request_data *data)
-{
-	const struct uvc_streaming_control *ctrl =
-		(const struct uvc_streaming_control *)&data->data;
-	struct uvc_streaming_control *target;
-
-	switch (dev->control) {
-	case UVC_VS_PROBE_CONTROL:
-		printf("setting probe control, length = %d\n", data->length);
-		target = &dev->probe;
-		break;
-
-	case UVC_VS_COMMIT_CONTROL:
-		printf("setting commit control, length = %d\n", data->length);
-		target = &dev->commit;
-		break;
-
-	default:
-		printf("setting unknown control, length = %d\n", data->length);
-		return;
-	}
-
-	uvc_fill_streaming_control(dev, target, ctrl->bFormatIndex,
-				   ctrl->bFrameIndex, ctrl->dwFrameInterval);
-
-	if (dev->control == UVC_VS_COMMIT_CONTROL) {
-		const struct uvc_function_config_format *format;
-		const struct uvc_function_config_frame *frame;
-		struct v4l2_pix_format pixfmt;
-
-		format = &dev->fc->streaming.formats[target->bFormatIndex-1];
-		frame = &format->frames[target->bFrameIndex-1];
-
-		dev->fcc = format->fcc;
-		dev->width = frame->width;
-		dev->height = frame->height;
-
-		memset(&pixfmt, 0, sizeof pixfmt);
-		pixfmt.width = frame->width;
-		pixfmt.height = frame->height;
-		pixfmt.pixelformat = format->fcc;
-		pixfmt.field = V4L2_FIELD_NONE;
-		if (format->fcc == V4L2_PIX_FMT_MJPEG)
-			pixfmt.sizeimage = dev->maxsize * 1.5;
-
-		uvc_stream_set_format(dev->stream, &pixfmt);
-	}
-}
-
-static void uvc_events_process(void *d)
-{
-	struct uvc_device *dev = d;
-	struct v4l2_event v4l2_event;
-	const struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
-	struct uvc_request_data resp;
-	int ret;
-
-	ret = ioctl(dev->vdev->fd, VIDIOC_DQEVENT, &v4l2_event);
-	if (ret < 0) {
-		printf("VIDIOC_DQEVENT failed: %s (%d)\n", strerror(errno),
-			errno);
-		return;
-	}
-
-	memset(&resp, 0, sizeof resp);
-	resp.length = -EL2HLT;
-
-	switch (v4l2_event.type) {
-	case UVC_EVENT_CONNECT:
-	case UVC_EVENT_DISCONNECT:
-		return;
-
-	case UVC_EVENT_SETUP:
-		uvc_events_process_setup(dev, &uvc_event->req, &resp);
-		break;
-
-	case UVC_EVENT_DATA:
-		uvc_events_process_data(dev, &uvc_event->data);
-		return;
-
-	case UVC_EVENT_STREAMON:
-		uvc_stream_enable(dev->stream, 1);
-		return;
-
-	case UVC_EVENT_STREAMOFF:
-		uvc_stream_enable(dev->stream, 0);
-		return;
-	}
-
-	ioctl(dev->vdev->fd, UVCIOC_SEND_RESPONSE, &resp);
-	if (ret < 0) {
-		printf("UVCIOC_S_EVENT failed: %s (%d)\n", strerror(errno),
-			errno);
-		return;
-	}
-}
-
-/* ---------------------------------------------------------------------------
- * Initialization and setup
- */
-
-void uvc_events_init(struct uvc_device *dev, struct events *events)
-{
-	struct v4l2_event_subscription sub;
-
-	/* Default to the minimum values. */
-	uvc_fill_streaming_control(dev, &dev->probe, 1, 1, 0);
-	uvc_fill_streaming_control(dev, &dev->commit, 1, 1, 0);
-
-	memset(&sub, 0, sizeof sub);
-	sub.type = UVC_EVENT_SETUP;
-	ioctl(dev->vdev->fd, VIDIOC_SUBSCRIBE_EVENT, &sub);
-	sub.type = UVC_EVENT_DATA;
-	ioctl(dev->vdev->fd, VIDIOC_SUBSCRIBE_EVENT, &sub);
-	sub.type = UVC_EVENT_STREAMON;
-	ioctl(dev->vdev->fd, VIDIOC_SUBSCRIBE_EVENT, &sub);
-	sub.type = UVC_EVENT_STREAMOFF;
-	ioctl(dev->vdev->fd, VIDIOC_SUBSCRIBE_EVENT, &sub);
-
-	events_watch_fd(events, dev->vdev->fd, EVENT_EXCEPTION,
-			uvc_events_process, dev);
-}
-
-void uvc_set_config(struct uvc_device *dev, struct uvc_function_config *fc)
-{
-	/* FIXME: The maximum size should be specified per format and frame. */
-	dev->maxsize = 0;
-	dev->fc = fc;
-}
-
-int uvc_set_format(struct uvc_device *dev, struct v4l2_pix_format *format)
-{
-	return v4l2_set_format(dev->vdev, format);
-}
-
-struct v4l2_device *uvc_v4l2_device(struct uvc_device *dev)
-{
-	/*
-	 * TODO: The V4L2 device shouldn't be exposed. We should replace this
-	 * with an abstract video sink class when one will be avaiilable.
-	 */
-	return dev->vdev;
-}