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gecko-dev/dom/camera/ICameraControl.h

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef DOM_CAMERA_ICAMERACONTROL_H
#define DOM_CAMERA_ICAMERACONTROL_H
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsAutoPtr.h"
#include "nsISupportsImpl.h"
#include "base/basictypes.h"
struct DeviceStorageFileDescriptor;
class nsIFile;
namespace mozilla {
class CameraControlListener;
// XXXmikeh - In some future patch this should move into the ICameraControl
// class as well, and the names updated to the 'k'-style;
// e.g. kParamPreviewSize, etc.
enum {
// current settings
CAMERA_PARAM_PREVIEWSIZE,
CAMERA_PARAM_PREVIEWFORMAT,
CAMERA_PARAM_PREVIEWFRAMERATE,
CAMERA_PARAM_VIDEOSIZE,
CAMERA_PARAM_PICTURE_SIZE,
CAMERA_PARAM_PICTURE_FILEFORMAT,
CAMERA_PARAM_PICTURE_ROTATION,
CAMERA_PARAM_PICTURE_LOCATION,
CAMERA_PARAM_PICTURE_DATETIME,
CAMERA_PARAM_PICTURE_QUALITY,
CAMERA_PARAM_EFFECT,
CAMERA_PARAM_WHITEBALANCE,
CAMERA_PARAM_SCENEMODE,
CAMERA_PARAM_FLASHMODE,
CAMERA_PARAM_FOCUSMODE,
CAMERA_PARAM_ZOOM,
CAMERA_PARAM_METERINGAREAS,
CAMERA_PARAM_FOCUSAREAS,
CAMERA_PARAM_FOCALLENGTH,
CAMERA_PARAM_FOCUSDISTANCENEAR,
CAMERA_PARAM_FOCUSDISTANCEOPTIMUM,
CAMERA_PARAM_FOCUSDISTANCEFAR,
CAMERA_PARAM_EXPOSURECOMPENSATION,
CAMERA_PARAM_THUMBNAILSIZE,
CAMERA_PARAM_THUMBNAILQUALITY,
CAMERA_PARAM_SENSORANGLE,
CAMERA_PARAM_ISOMODE,
CAMERA_PARAM_LUMINANCE,
CAMERA_PARAM_SCENEMODE_HDR_RETURNNORMALPICTURE,
CAMERA_PARAM_RECORDINGHINT,
CAMERA_PARAM_PREFERRED_PREVIEWSIZE_FOR_VIDEO,
CAMERA_PARAM_METERINGMODE,
// supported features
CAMERA_PARAM_SUPPORTED_PREVIEWSIZES,
CAMERA_PARAM_SUPPORTED_PICTURESIZES,
CAMERA_PARAM_SUPPORTED_VIDEOSIZES,
CAMERA_PARAM_SUPPORTED_PICTUREFORMATS,
CAMERA_PARAM_SUPPORTED_WHITEBALANCES,
CAMERA_PARAM_SUPPORTED_SCENEMODES,
CAMERA_PARAM_SUPPORTED_EFFECTS,
CAMERA_PARAM_SUPPORTED_FLASHMODES,
CAMERA_PARAM_SUPPORTED_FOCUSMODES,
CAMERA_PARAM_SUPPORTED_MAXFOCUSAREAS,
CAMERA_PARAM_SUPPORTED_MAXMETERINGAREAS,
CAMERA_PARAM_SUPPORTED_MINEXPOSURECOMPENSATION,
CAMERA_PARAM_SUPPORTED_MAXEXPOSURECOMPENSATION,
CAMERA_PARAM_SUPPORTED_EXPOSURECOMPENSATIONSTEP,
CAMERA_PARAM_SUPPORTED_ZOOM,
CAMERA_PARAM_SUPPORTED_ZOOMRATIOS,
CAMERA_PARAM_SUPPORTED_MAXDETECTEDFACES,
CAMERA_PARAM_SUPPORTED_JPEG_THUMBNAIL_SIZES,
CAMERA_PARAM_SUPPORTED_ISOMODES,
CAMERA_PARAM_SUPPORTED_METERINGMODES
};
class ICameraControl
{
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ICameraControl)
// Returns the number of cameras supported by the system.
//
// Return values:
// - NS_OK on success;
// - NS_ERROR_FAILURE if the camera count cannot be retrieved.
static nsresult GetNumberOfCameras(int32_t& aDeviceCount);
// Gets the (possibly-meaningful) name of a particular camera.
//
// Return values:
// - NS_OK on success;
// - NS_ERROR_INVALID_ARG if 'aDeviceNum' is not a valid camera number;
// - NS_ERROR_NOT_AVAILABLE if 'aDeviceNum' is valid but the camera name
// could still not be retrieved.
static nsresult GetCameraName(uint32_t aDeviceNum, nsCString& aDeviceName);
// Returns a list of names of all cameras supported by the system.
//
// Return values:
// - NS_OK on success, even if no camera names are returned (in which
// case 'aList' will be empty);
// - NS_ERROR_NOT_AVAILABLE if the list of cameras cannot be retrieved.
static nsresult GetListOfCameras(nsTArray<nsString>& aList);
enum Mode {
kUnspecifiedMode,
kPictureMode,
kVideoMode,
};
struct Size {
uint32_t width;
uint32_t height;
};
struct Region {
int32_t top;
int32_t left;
int32_t bottom;
int32_t right;
uint32_t weight;
};
struct Position {
double latitude;
double longitude;
double altitude;
double timestamp;
};
struct StartRecordingOptions {
uint32_t rotation;
uint64_t maxFileSizeBytes;
uint64_t maxVideoLengthMs;
bool autoEnableLowLightTorch;
};
struct Configuration {
Mode mMode;
Size mPreviewSize;
Size mPictureSize;
nsString mRecorderProfile;
};
struct Point {
int32_t x;
int32_t y;
};
struct Face {
uint32_t id;
uint32_t score;
Region bound;
bool hasLeftEye;
Point leftEye;
bool hasRightEye;
Point rightEye;
bool hasMouth;
Point mouth;
};
class RecorderProfile
{
public:
class Video
{
public:
Video() { }
virtual ~Video() { }
const nsString& GetCodec() const { return mCodec; }
const Size& GetSize() const { return mSize; }
uint32_t GetBitsPerSecond() const { return mBitsPerSecond; }
uint32_t GetFramesPerSecond() const { return mFramesPerSecond; }
protected:
nsString mCodec;
Size mSize;
uint32_t mBitsPerSecond;
uint32_t mFramesPerSecond;
private:
DISALLOW_EVIL_CONSTRUCTORS(Video);
};
class Audio
{
public:
Audio() { }
virtual ~Audio() { }
const nsString& GetCodec() const { return mCodec; }
uint32_t GetChannels() const { return mChannels; }
uint32_t GetBitsPerSecond() const { return mBitsPerSecond; }
uint32_t GetSamplesPerSecond() const { return mSamplesPerSecond; }
protected:
nsString mCodec;
uint32_t mChannels;
uint32_t mBitsPerSecond;
uint32_t mSamplesPerSecond;
private:
DISALLOW_EVIL_CONSTRUCTORS(Audio);
};
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(RecorderProfile)
RecorderProfile()
{ }
const nsString& GetName() const { return mName; }
const nsString& GetContainer() const { return mContainer; }
const nsString& GetMimeType() const { return mMimeType; }
virtual const Video& GetVideo() const = 0;
virtual const Audio& GetAudio() const = 0;
protected:
virtual ~RecorderProfile() { }
nsString mName;
nsString mContainer;
nsString mMimeType;
private:
DISALLOW_EVIL_CONSTRUCTORS(RecorderProfile);
};
static already_AddRefed<ICameraControl> Create(uint32_t aCameraId);
virtual void AddListener(CameraControlListener* aListener) = 0;
virtual void RemoveListener(CameraControlListener* aListener) = 0;
// Camera control methods.
//
// Return values:
// - NS_OK on success (if the method requires an asynchronous process,
// this value indicates that the process has begun successfully);
// - NS_ERROR_INVALID_ARG if one or more arguments is invalid;
// - NS_ERROR_FAILURE if an asynchronous method could not be dispatched.
virtual nsresult Start(const Configuration* aInitialConfig = nullptr) = 0;
virtual nsresult Stop() = 0;
virtual nsresult SetConfiguration(const Configuration& aConfig) = 0;
virtual nsresult StartPreview() = 0;
virtual nsresult StopPreview() = 0;
virtual nsresult AutoFocus() = 0;
virtual nsresult TakePicture() = 0;
virtual nsresult StartRecording(DeviceStorageFileDescriptor* aFileDescriptor,
const StartRecordingOptions* aOptions = nullptr) = 0;
virtual nsresult StopRecording() = 0;
virtual nsresult StartFaceDetection() = 0;
virtual nsresult StopFaceDetection() = 0;
virtual nsresult ResumeContinuousFocus() = 0;
// Camera parameter getters and setters. 'aKey' must be one of the
// CAMERA_PARAM_* values enumerated above.
//
// Return values:
// - NS_OK on success;
// - NS_ERROR_INVALID_ARG if 'aValue' contains an invalid value;
// - NS_ERROR_NOT_IMPLEMENTED if 'aKey' is invalid;
// - NS_ERROR_NOT_AVAILABLE if the getter fails to retrieve a valid value,
// or if a setter fails because it requires one or more values that
// could not be retrieved;
// - NS_ERROR_FAILURE on unexpected internal failures.
virtual nsresult Set(uint32_t aKey, const nsAString& aValue) = 0;
virtual nsresult Get(uint32_t aKey, nsAString& aValue) = 0;
virtual nsresult Set(uint32_t aKey, double aValue) = 0;
virtual nsresult Get(uint32_t aKey, double& aValue) = 0;
virtual nsresult Set(uint32_t aKey, int32_t aValue) = 0;
virtual nsresult Get(uint32_t aKey, int32_t& aValue) = 0;
virtual nsresult Set(uint32_t aKey, int64_t aValue) = 0;
virtual nsresult Get(uint32_t aKey, int64_t& aValue) = 0;
virtual nsresult Set(uint32_t aKey, bool aValue) = 0;
virtual nsresult Get(uint32_t aKey, bool& aValue) = 0;
virtual nsresult Set(uint32_t aKey, const Size& aValue) = 0;
virtual nsresult Get(uint32_t aKey, Size& aValue) = 0;
virtual nsresult Set(uint32_t aKey, const nsTArray<Region>& aRegions) = 0;
virtual nsresult Get(uint32_t aKey, nsTArray<Region>& aRegions) = 0;
virtual nsresult SetLocation(const Position& aLocation) = 0;
virtual nsresult Get(uint32_t aKey, nsTArray<Size>& aSizes) = 0;
virtual nsresult Get(uint32_t aKey, nsTArray<nsString>& aValues) = 0;
virtual nsresult Get(uint32_t aKey, nsTArray<double>& aValues) = 0;
virtual nsresult GetRecorderProfiles(nsTArray<nsString>& aProfiles) = 0;
virtual RecorderProfile* GetProfileInfo(const nsAString& aProfile) = 0;
protected:
virtual ~ICameraControl() { }
friend class ICameraControlParameterSetAutoEnter;
virtual void BeginBatchParameterSet() = 0;
virtual void EndBatchParameterSet() = 0;
};
// Helper class to make it easy to update a batch of camera parameters;
// the parameters are applied atomically when this object goes out of
// scope.
class ICameraControlParameterSetAutoEnter
{
public:
explicit ICameraControlParameterSetAutoEnter(ICameraControl* aCameraControl)
: mCameraControl(aCameraControl)
{
mCameraControl->BeginBatchParameterSet();
}
virtual ~ICameraControlParameterSetAutoEnter()
{
mCameraControl->EndBatchParameterSet();
}
protected:
nsRefPtr<ICameraControl> mCameraControl;
};
} // namespace mozilla
#endif // DOM_CAMERA_ICAMERACONTROL_H
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