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camera: Added SDL_GetCameraDevicePosition.

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Otherwise, as a property, you have to open each camera device to figure out
which ones are which.
This commit is contained in:
Ryan C. Gordon
2024-02-19 14:19:57 -05:00
parent b1ed49772c
commit 70b89ab70d
8 changed files with 75 additions and 49 deletions
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25
src/camera/SDL_camera.c
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@@ -398,9 +398,8 @@ static int SDLCALL CameraSpecCmp(const void *vpa, const void *vpb)
return 0; // apparently, they're equal.
}
// The camera backends call this when a new device is plugged in.
SDL_CameraDevice *SDL_AddCameraDevice(const char *name, int num_specs, const SDL_CameraSpec *specs, void *handle)
SDL_CameraDevice *SDL_AddCameraDevice(const char *name, SDL_CameraPosition position, int num_specs, const SDL_CameraSpec *specs, void *handle)
{
SDL_assert(name != NULL);
SDL_assert(num_specs >= 0);
@@ -425,6 +424,8 @@ SDL_CameraDevice *SDL_AddCameraDevice(const char *name, int num_specs, const SDL
return NULL;
}
device->position = position;
device->lock = SDL_CreateMutex();
if (!device->lock) {
SDL_free(device->name);
@@ -457,7 +458,13 @@ SDL_CameraDevice *SDL_AddCameraDevice(const char *name, int num_specs, const SDL
}
#if DEBUG_CAMERA
SDL_Log("CAMERA: Adding device ('%s') with %d spec%s%s", name, num_specs, (num_specs == 1) ? "" : "s", (num_specs == 0) ? "" : ":");
const char *posstr = "unknown position";
if (position == SDL_CAMERA_POSITION_FRONT_FACING) {
posstr = "front-facing";
} else if (position == SDL_CAMERA_POSITION_BACK_FACING) {
posstr = "back-facing";
}
SDL_Log("CAMERA: Adding device '%s' (%s) with %d spec%s%s", name, posstr, num_specs, (num_specs == 1) ? "" : "s", (num_specs == 0) ? "" : ":");
for (int i = 0; i < num_specs; i++) {
const SDL_CameraSpec *spec = &device->all_specs[i];
SDL_Log("CAMERA: - fmt=%s, w=%d, h=%d, numerator=%d, denominator=%d", SDL_GetPixelFormatName(spec->format), spec->width, spec->height, spec->interval_numerator, spec->interval_denominator);
@@ -658,6 +665,18 @@ char *SDL_GetCameraDeviceName(SDL_CameraDeviceID instance_id)
return retval;
}
SDL_CameraPosition SDL_GetCameraDevicePosition(SDL_CameraDeviceID instance_id)
{
SDL_CameraPosition retval = SDL_CAMERA_POSITION_UNKNOWN;
SDL_CameraDevice *device = ObtainPhysicalCameraDevice(instance_id);
if (device) {
retval = device->position;
ReleaseCameraDevice(device);
}
return retval;
}
SDL_CameraDeviceID *SDL_GetCameraDevices(int *count)
{
int dummy_count;