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camera: Emscripten support!

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This also adds code to deal with waiting for the user to approve camera
access, reworks testcameraminimal to use main callbacks, etc.
This commit is contained in:
Ryan C. Gordon
2023-12-22 01:23:49 -05:00
parent 182f707284
commit 67708f9110
14 changed files with 559 additions and 145 deletions
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7
src/camera/SDL_syscamera.h
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@@ -50,6 +50,9 @@ extern void SDL_CameraDeviceDisconnected(SDL_CameraDevice *device);
// Find an SDL_CameraDevice, selected by a callback. NULL if not found. DOES NOT LOCK THE DEVICE.
extern SDL_CameraDevice *SDL_FindPhysicalCameraDeviceByCallback(SDL_bool (*callback)(SDL_CameraDevice *device, void *userdata), void *userdata);
// Backends should call this when the user has approved/denied access to a camera.
extern void SDL_CameraDevicePermissionOutcome(SDL_CameraDevice *device, SDL_bool approved);
// These functions are the heart of the camera threads. Backends can call them directly if they aren't using the SDL-provided thread.
extern void SDL_CameraThreadSetup(SDL_CameraDevice *device);
extern SDL_bool SDL_CameraThreadIterate(SDL_CameraDevice *device);
@@ -129,6 +132,9 @@ struct SDL_CameraDevice
// Optional properties.
SDL_PropertiesID props;
// -1: user denied permission, 0: waiting for user response, 1: user approved permission.
int permission;
// Data private to this driver, used when device is opened and running.
struct SDL_PrivateCameraData *hidden;
};
@@ -182,5 +188,6 @@ extern CameraBootStrap DUMMYCAMERA_bootstrap;
extern CameraBootStrap V4L2_bootstrap;
extern CameraBootStrap COREMEDIA_bootstrap;
extern CameraBootStrap ANDROIDCAMERA_bootstrap;
extern CameraBootStrap EMSCRIPTENCAMERA_bootstrap;
#endif // SDL_syscamera_h_