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linux-v4l2: Add support for virtual camera on non-Linux environments

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This commit is contained in:
Yuri Victorovich
2025-04-22 20:45:55 -07:00
committed by Ryan Foster
parent 99d7d134a7
commit b540c47b8f
1 changed files with 34 additions and 0 deletions
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34
plugins/linux-v4l2/v4l2-output.c
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@@ -31,6 +31,7 @@ static void virtualcam_destroy(void *data)
bfree(data);
}
#if defined(__linux__)
static bool is_flatpak_sandbox(void)
{
static bool flatpak_info_exists = false;
@@ -101,6 +102,32 @@ static int loopback_module_load()
return run_command(
"pkexec modprobe v4l2loopback exclusive_caps=1 card_label='OBS Virtual Camera' && sleep 0.5");
}
#else
bool loopback_module_available()
{
struct v4l2_capability capability;
char new_device[16];
int fd;
int i;
for (i = 0; i != 32; i++) {
snprintf(new_device, 16, "/dev/video%d", i);
fd = open(new_device, O_RDWR);
if (fd < 0)
continue;
if (ioctl(fd, VIDIOC_QUERYCAP, &capability) < 0) {
close(fd);
continue;
}
if (capability.capabilities & V4L2_CAP_VIDEO_OUTPUT) {
close(fd);
return true;
}
close(fd);
}
return false;
}
#endif
static void *virtualcam_create(obs_data_t *settings, obs_output_t *output)
{
@@ -244,10 +271,12 @@ static bool virtualcam_start(void *data)
bool success = false;
int n;
#if defined(__linux__)
if (!loopback_module_loaded()) {
if (loopback_module_load() != 0)
return false;
}
#endif
n = scandir("/dev", &list, scanfilter,
#if defined(__linux__)
@@ -263,6 +292,11 @@ static bool virtualcam_start(void *data)
for (int i = 0; i < n; i++) {
char device[32] = {0};
#if !defined(__linux__)
if (strstr(list[i]->d_name, "video") != list[i]->d_name)
continue;
#endif
// Use the return value of snprintf to prevent truncation warning.
int written = snprintf(device, 32, "/dev/%s", list[i]->d_name);
if (written >= 32)