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#include "camera.h"
#include "common/io.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#if FF_HAVE_LINUX_VIDEODEV2
#include <linux/videodev2.h>
#elif __has_include(<sys/videoio.h>) // OpenBSD
#include <sys/videoio.h>
#define FF_HAVE_LINUX_VIDEODEV2 1
#endif
const char* ffDetectCamera(FFlist* result) {
#if FF_HAVE_LINUX_VIDEODEV2
char path[] = "/dev/videoN";
for (uint32_t i = 0; i <= 9; ++i) {
path[ARRAY_SIZE(path) - 2] = (char) (i + '0');
FF_AUTO_CLOSE_FD int fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd < 0) {
if (errno == ENOENT) {
break;
}
if (errno == ENXIO) {
continue;
}
return "Failed to open /dev/videoN";
}
struct v4l2_capability cap = {};
if (ioctl(fd, VIDIOC_QUERYCAP, &cap) < 0 || !(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
continue;
}
struct v4l2_format fmt = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE };
if (ioctl(fd, VIDIOC_G_FMT, &fmt) < 0) {
continue;
}
FFCameraResult* camera = FF_LIST_ADD(FFCameraResult, *result);
ffStrbufInitS(&camera->name, (const char*) cap.card);
ffStrbufInit(&camera->vendor);
ffStrbufInitS(&camera->id, (const char*) cap.bus_info);
switch (fmt.fmt.pix.colorspace) {
case V4L2_COLORSPACE_SMPTE170M:
ffStrbufInitStatic(&camera->colorspace, "SMPTE 170M");
break;
case V4L2_COLORSPACE_SMPTE240M:
ffStrbufInitStatic(&camera->colorspace, "SMPTE 240M");
break;
case V4L2_COLORSPACE_BT878:
ffStrbufInitStatic(&camera->colorspace, "BT.878");
break;
case V4L2_COLORSPACE_470_SYSTEM_M:
ffStrbufInitStatic(&camera->colorspace, "NTSC");
break;
case V4L2_COLORSPACE_470_SYSTEM_BG:
ffStrbufInitStatic(&camera->colorspace, "EBU 3213");
break;
case V4L2_COLORSPACE_JPEG:
ffStrbufInitStatic(&camera->colorspace, "JPEG");
break;
case V4L2_COLORSPACE_REC709:
case V4L2_COLORSPACE_SRGB:
ffStrbufInitStatic(&camera->colorspace, "sRGB");
break;
case 9 /* V4L2_COLORSPACE_OPRGB */:
ffStrbufInitStatic(&camera->colorspace, "Adobe RGB");
break;
case 10 /* V4L2_COLORSPACE_BT2020 */:
ffStrbufInitStatic(&camera->colorspace, "BT.2020");
break;
case 11 /* V4L2_COLORSPACE_RAW */:
ffStrbufInitStatic(&camera->colorspace, "RAW");
break;
case 12 /* V4L2_COLORSPACE_DCI_P3 */:
ffStrbufInitStatic(&camera->colorspace, "DCI-P3");
break;
default:
ffStrbufInit(&camera->colorspace);
break;
}
camera->width = fmt.fmt.pix.width;
camera->height = fmt.fmt.pix.height;
}
return NULL;
#else
FF_UNUSED(result);
return "Fastfetch was compiled without <linux/videodev2.h>";
#endif
}
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