thetauvc.c

/*
  Copyright 2020 K. Takeo. All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  1. Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the following
  disclaimer in the documentation and/or other materials provided
  with the distribution.
  3. Neither the name of the author nor other contributors may be
  used to endorse or promote products derived from this software
  without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGE.

 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "libuvc/libuvc.h"
#include "thetauvc.h"

#define USBVID_RICOH 0x05ca
#define USBPID_THETAV_UVC 0x2712
#define USBPID_THETAZ1_UVC 0x2715
#define USBPID_THETAX_UVC 0x2717


struct thetauvc_mode {
	unsigned int mode;
	unsigned int width;
	unsigned int height;
	unsigned int fps;
};

typedef struct thetauvc_mode thetauvc_mode_t;

static thetauvc_mode_t stream_mode[] = {
	{
		.mode = THETAUVC_MODE_UHD_2997,
		.width = 3840,
		.height = 1920,
		.fps = 29
	},
	{
		.mode = THETAUVC_MODE_FHD_2997,
		.width = 1920,
		.height = 960,
		.fps = 29
	},
	{
		.mode = THETAUVC_MODE_NUM,
		.width = 0,
		.height = 0,
		.fps = 0
	}
};
		

uvc_error_t
thetauvc_find_devices(uvc_context_t *ctx, uvc_device_t ***devs)
{
	uvc_device_t **devlist, **ret;
	uvc_device_t *dev;
	uvc_error_t res;

	int idx, devcnt;
	
	res = uvc_find_devices(ctx, &devlist, USBVID_RICOH, 0, NULL);
	if (res != UVC_SUCCESS) {
		return res;
	}

	ret = (uvc_device_t **)malloc(sizeof(uvc_device_t *));
	if (ret == NULL) {
		uvc_free_device_list(devlist, 1);
		return UVC_ERROR_NO_MEM;
	}
	*ret = NULL;

	for (idx = 0, devcnt = 0; (dev = devlist[idx]) != NULL; idx++) {
		uvc_device_descriptor_t *desc;

		if (uvc_get_device_descriptor(dev, &desc) != UVC_SUCCESS)
			continue;

		if (desc->idProduct == USBPID_THETAV_UVC
			|| desc->idProduct == USBPID_THETAZ1_UVC
			|| desc->idProduct == USBPID_THETAX_UVC) {
			void *tmp_ptr;

			devcnt++;

			tmp_ptr = realloc(ret, (devcnt+1) * sizeof(uvc_device_t *));
			if (tmp_ptr == NULL) {
				uvc_free_device_list(devlist, 1);
				uvc_free_device_descriptor(desc);
				free(ret);
				return UVC_ERROR_NO_MEM;
			}

			ret = tmp_ptr;
			ret[devcnt-1] = dev;
			ret[devcnt] = NULL;
		}
		uvc_free_device_descriptor(desc);
	}

	for (idx=0; idx < devcnt; idx++)
		uvc_ref_device(ret[idx]);
		
	uvc_free_device_list(devlist, 1);

	if (devcnt) {
		*devs = ret;
		return UVC_SUCCESS;
	} else {
		free(ret);
		return UVC_ERROR_NO_DEVICE;
	}

}	

uvc_error_t
thetauvc_print_devices(uvc_context_t *ctx, FILE *fp)
{
	uvc_device_t **devlist;
	uvc_error_t res;
	FILE *outfp;
	int idx;

	outfp = (fp == NULL) ? stdout : fp;
	res = thetauvc_find_devices(ctx, &devlist);
	if (res != UVC_SUCCESS) {
		uvc_perror(res,"");
		return res;
	}

	fprintf(outfp, "No : %-18s : %-10s\n", "Product", "Serial");
	for (idx = 0; devlist[idx] != NULL; idx++) {
		uvc_device_descriptor_t *desc;

		if (uvc_get_device_descriptor(devlist[idx], &desc) != UVC_SUCCESS)
			continue;

		fprintf(outfp, "%2d : %-18s : %-10s\n", idx, desc->product,
			desc->serialNumber);
		uvc_free_device_descriptor(desc);
	}

	uvc_free_device_list(devlist, 1);

	return UVC_SUCCESS;
}


uvc_error_t
thetauvc_find_device(uvc_context_t *ctx, uvc_device_t **devh, unsigned int index)
{
	uvc_device_t **devlist;
	uvc_error_t res;
	unsigned int idx;

	res = thetauvc_find_devices(ctx, &devlist);
	if (res != UVC_SUCCESS)
		return res;

	for (idx = 0; idx <= index; idx++) {
		if (devlist[idx] == NULL) {
			uvc_free_device_list(devlist, 1);
			return UVC_ERROR_NO_DEVICE;
		}
	}

	uvc_ref_device(devlist[index]);
	*devh = devlist[index];
	uvc_free_device_list(devlist, 1);
	
	return UVC_SUCCESS;
}

uvc_error_t
thetauvc_find_device_by_serial(uvc_context_t *ctx, uvc_device_t **devh,
	const char *serial)
{
	uvc_device_t **devlist, *dev;
	uvc_error_t res;
	unsigned int idx;
	int found;

	res = thetauvc_find_devices(ctx, &devlist);
	if (res != UVC_SUCCESS)
		return res;

	found = 0;
	if (serial == NULL) {
		dev = devlist[0];
		found = 1;
	} else {
		uvc_device_descriptor_t *desc;

		idx = 0;
		do {
			dev = devlist[idx++];
			if (dev == NULL) {
				res = UVC_ERROR_NO_DEVICE;
				break;
			}

			if (uvc_get_device_descriptor(dev, &desc) != UVC_SUCCESS)
				continue;

			if (desc->serialNumber && !strcmp(desc->serialNumber, serial))
				found=1;

			uvc_free_device_descriptor(desc);

		} while (found != 1);
	}

	if (dev != NULL) {
		uvc_ref_device(dev);
		*devh = dev;
	}

	uvc_free_device_list(devlist, 1);
	return res;
}

uvc_error_t
thetauvc_get_stream_ctrl_format_size(uvc_device_handle_t *devh,
	       	unsigned int mode, uvc_stream_ctrl_t *ctrl)
{
	uvc_error_t res;
	thetauvc_mode_t *m;
	
	if (!(mode < THETAUVC_MODE_NUM))
		return UVC_ERROR_INVALID_MODE;

	m = &stream_mode[mode];

	res = uvc_get_stream_ctrl_format_size(devh, ctrl,
			UVC_FRAME_FORMAT_H264, m->width, m->height, m->fps);

	return res;
}


uvc_error_t
thetauvc_run_streaming(uvc_device_t *dev, uvc_device_handle_t **devh,
	unsigned int mode, uvc_frame_callback_t *cb, void *pdata)
{
	uvc_error_t res;
	uvc_stream_ctrl_t ctrl;

	res = uvc_open(dev, devh);
	if (res != UVC_SUCCESS)
		return res;
	thetauvc_get_stream_ctrl_format_size(*devh, mode, &ctrl);	
	if (res != UVC_SUCCESS)
		printf("error");

	res = uvc_start_streaming(*devh, &ctrl, cb, pdata, 0);

	uvc_close(*devh);

	return UVC_SUCCESS;
}