summaryrefslogtreecommitdiff
path: root/moticam.c
blob: 15e2ac2195904e0d11cdaca726bff382263cb732 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
/* Moticam 3+ viewer.
 *
 * Copyright (C) 2019 Nicolas Schodet
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Contact :
 *        Web: http://ni.fr.eu.org/
 *      Email: <nico at ni.fr.eu.org>
 */
#define _GNU_SOURCE
#include <assert.h>
#include <libusb.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <error.h>
#include <getopt.h>
#include <time.h>
#include <string.h>
#include <stdbool.h>

#define ID_VENDOR 0x232f
#define ID_PRODUCT 0x0100

struct options {
    int width;
    int height;
    double exposure;
    double gain;
    int count;
    const char *out;
};

void
usage(int status, const char *msg)
{
    if (msg)
	error(0, 0, "%s", msg);
    fprintf(status == EXIT_SUCCESS ? stdout : stderr,
	    "usage: %s [options] [FILE]\n"
	    "\n"
	    "Moticam 3+ viewer.\n"
	    "\n"
	    "positional arguments:\n"
	    "  FILE               output file (default: out)\n"
	    "\n"
	    "optional arguments:\n"
	    "  -h, --help         show this help message and exit\n"
	    "  -w, --width VALUE  image width (512, 1024 or 2048,"
	    " default: 1024)\n"
	    "  -e, --exposure MS  exposure value (1 to 5000,"
	    " default: 100)\n"
	    "  -g, --gain VALUE   gain value (0.33 to 42.66,"
	    " default: 1)\n"
	    "  -n, --count N      number of image to take (default: 30)\n"
	    , program_invocation_name);
    exit(status);
}

void
parse_options(int argc, char **argv, struct options *options)
{
    options->width = 1024;
    options->height = 768;
    options->exposure = 100.0;
    options->gain = 1.0;
    options->count = 30;
    options->out = NULL;
    char *tail;
    while (1) {
	static struct option long_options[] = {
	    { "help", no_argument, 0, 'h' },
	    { "width", required_argument, 0, 'w' },
	    { "exposure", required_argument, 0, 'e' },
	    { "gain", required_argument, 0, 'g' },
	    { "count", required_argument, 0, 'n' },
	    { NULL },
	};
	int option_index = 0;
	int c = getopt_long(argc, argv, "hw:e:g:n:", long_options,
		&option_index);
	if (c == -1)
	    break;
	switch (c) {
	case 'h':
	    usage(EXIT_SUCCESS, NULL);
	    break;
	case 'w':
	    if (strcmp(optarg, "512") == 0) {
		options->width = 512;
		options->height = 384;
	    } else if (strcmp(optarg, "1024") == 0) {
		options->width = 1024;
		options->height = 768;
	    } else if (strcmp(optarg, "2048") == 0) {
		options->width = 2048;
		options->height = 1536;
	    } else
		usage(EXIT_FAILURE, "bad width value");
	    break;
	case 'e':
	    errno = 0;
	    options->exposure = strtod(optarg, &tail);
	    if (*tail != '\0' || errno || options->exposure < 1
		    || options->exposure > 5000)
		usage(EXIT_FAILURE, "bad exposure value");
	    break;
	case 'g':
	    errno = 0;
	    options->gain = strtod(optarg, &tail);
	    if (*tail != '\0' || errno || options->gain <= 0.0
		    || options->gain >= 43.0)
		usage(EXIT_FAILURE, "bad gain value");
	    break;
	case 'n':
	    errno = 0;
	    options->count = strtoul(optarg, &tail, 10);
	    if (*tail != '\0' || errno)
		usage(EXIT_FAILURE, "bad count value");
	    break;
	case '?':
	    usage(EXIT_FAILURE, NULL);
	    break;
	default:
	    abort();
	}
    }
    if (optind < argc)
	options->out = argv[optind++];
    if (optind < argc)
	usage(EXIT_FAILURE, "too many arguments");
    if (!options->out)
	options->out = "out";
}

libusb_device_handle *
device_open()
{
    libusb_device **list;
    libusb_device *found = NULL;
    int nfound = 0;
    ssize_t cnt = libusb_get_device_list(NULL, &list);
    ssize_t i = 0;
    if (cnt < 0)
	error(EXIT_FAILURE, 0, "can not list devices: %s",
		libusb_strerror(cnt));
    for (i = 0; i < cnt; i++) {
	libusb_device *device = list[i];
	struct libusb_device_descriptor desc;
	int r = libusb_get_device_descriptor(device, &desc);
	if (r)
	    error(EXIT_FAILURE, 0, "can not get device descriptor: %s",
		    libusb_strerror(r));
	if (desc.idVendor == ID_VENDOR && desc.idProduct == ID_PRODUCT) {
	    found = device;
	    nfound++;
	    break;
	}
    }
    if (nfound > 1)
	error(EXIT_FAILURE, 0,
		"more than one matching device, not supported");
    libusb_device_handle *handle = NULL;
    if (found) {
	int r = libusb_open(found, &handle);
	if (r)
	    error(EXIT_FAILURE, 0, "can not open device: %s",
		    libusb_strerror(r));
    }
    libusb_free_device_list(list, 1);
    return handle;
}

void
device_control_vendor(libusb_device_handle *handle, uint16_t wValue,
	const uint8_t *data, int data_cnt)
{
    int r = libusb_control_transfer(handle, LIBUSB_REQUEST_TYPE_VENDOR, 240,
	    wValue, 0, (uint8_t *) data, data_cnt, 0);
    if (r < 0)
	error(EXIT_FAILURE, 0, "can not send vendor: %s", libusb_strerror(r));
}

void
device_control_vendor_w(libusb_device_handle *handle, uint16_t wValue,
	const uint16_t data0)
{
    uint8_t data[] = { (uint8_t) (data0 >> 8), (uint8_t) data0 };
    device_control_vendor(handle, wValue, data, sizeof(data));
}

void
device_reset(libusb_device_handle *handle)
{
    device_control_vendor_w(handle, 0xba00, 0x0000);
    device_control_vendor_w(handle, 0xba00, 0x0001);
}

void
device_set_gain(libusb_device_handle *handle, double gain)
{
    double gmin, gmax;
    int xmin, xmax;
    bool up = false;
    if (gain <= 1.34) {
	gmin = 0.33;
	gmax = 1.33;
	xmin = 0x08;
	xmax = 0x20;
    } else if (gain <= 2.68) {
	gmin = 1.42;
	gmax = 2.67;
	xmin = 0x51;
	xmax = 0x60;
    } else {
	gmin = 3;
	gmax = 42.67;
	xmin = 0x1;
	xmax = 0x78;
	up = true;
    }
    int x = (gain - gmin) / (gmax - gmin) * (xmax - xmin) + xmin;
    if (x < xmin)
	x = xmin;
    else if (x > xmax)
	x = xmax;
    if (up)
	x = (x << 8) | 0x60;
    device_control_vendor_w(handle, 0xba2d, x);
    device_control_vendor_w(handle, 0xba2b, x);
    device_control_vendor_w(handle, 0xba2e, x);
    device_control_vendor_w(handle, 0xba2c, x);
}

void
device_set_exposure(libusb_device_handle *handle, double exposure)
{
    int exposure_w = exposure * 12.82;
    if (exposure_w < 0x000c)
	exposure_w = 0x000c;
    else if (exposure_w > 0xffff)
	exposure_w = 0xffff;
    device_control_vendor_w(handle, 0xba09, exposure_w);
}

void
device_set_resolution(libusb_device_handle *handle, int width, int height)
{
    static const uint8_t control_init[] = {
	0x00, 0x14, 0x00, 0x20, 0x05, 0xff, 0x07, 0xff };
    device_control_vendor(handle, 0xba01, control_init,
	    sizeof(control_init));
    static const uint8_t control_512x384[] = { 0x00, 0x03, 0x00, 0x03 };
    static const uint8_t control_1024x768[] = { 0x00, 0x11, 0x00, 0x11 };
    static const uint8_t control_2048x1536[] = { 0x00, 0x00, 0x00, 0x00 };
    switch (width)
    {
    case 512:
	assert(height == 384);
	device_control_vendor(handle, 0xba22, control_512x384,
		sizeof(control_512x384));
	break;
    case 1024:
	assert(height == 768);
	device_control_vendor(handle, 0xba22, control_1024x768,
		sizeof(control_1024x768));
	break;
    case 2048:
	assert(height == 1536);
	device_control_vendor(handle, 0xba22, control_2048x1536,
		sizeof(control_2048x1536));
	break;
    default:
	assert(0);
    }
}

void
delay_us(int us)
{
    struct timespec delay, remaining;
    delay.tv_sec = us / 1000000;
    delay.tv_nsec = us % 1000000 * 1000;
    while (nanosleep(&delay, &remaining) == -1) {
	if (errno == EINTR)
	    delay = remaining;
	else
	    error(EXIT_FAILURE, errno, "can not sleep");
    }
}

void
device_init(libusb_device_handle *handle, struct options *options)
{
    device_reset(handle);
    device_set_gain(handle, options->gain);
    device_set_exposure(handle, 30.0);
    device_set_resolution(handle, options->width, options->height);
    device_set_exposure(handle, options->exposure);
    delay_us(100000);
}

void
device_uninit(libusb_device_handle *handle)
{
    device_set_exposure(handle, 0.0);
    device_set_exposure(handle, 0.0);
    device_set_exposure(handle, 0.0);
}

void
run(libusb_device_handle *handle, struct options *options)
{
    int image_size = options->width * options->height;
    int frame_size = 16384;
    // Request an extra frame to read the zero length packet.
    uint8_t data[(image_size + frame_size) / frame_size * frame_size];
    FILE *out = fopen(options->out, "wb");
    if (!out)
	error(EXIT_FAILURE, errno, "can not open output file `%s'",
		options->out);
    for (int i = 0; i < options->count;) {
	int transfered = 0;
	int r = libusb_bulk_transfer(handle, 0x83, data, sizeof(data),
		&transfered, 0);
	if (r)
	    error(EXIT_FAILURE, 0, "can not read data: %s",
		    libusb_strerror(r));
	if (transfered != image_size)
	    fprintf(stderr, "bad image size (%d), drop\n", transfered);
	else {
	    fprintf(stderr, "write %d (%d)\n", i, transfered);
	    r = fwrite(data, transfered, 1, out);
	    if (r < 0)
		error(EXIT_FAILURE, errno, "can not write");
	    i++;
	}
    }
    fclose(out);
}

int
main(int argc, char **argv)
{
    struct options options;
    parse_options(argc, argv, &options);
    libusb_context *usb;
    int r = libusb_init(&usb);
    if (r)
	error(EXIT_FAILURE, 0, "unable to initialize libusb: %s",
		libusb_strerror(r));
    libusb_device_handle *handle = device_open();
    if (!handle)
	error(EXIT_FAILURE, 0, "unable to find device");
    device_init(handle, &options);
    run(handle, &options);
    device_uninit(handle);
    libusb_close(handle);
    libusb_exit(usb);
    return EXIT_SUCCESS;
}