split libsurfaceflinger_client and libcamera_client out of libui

1 files changed, 214 insertions, 0 deletions

diff --git a/include/camera/Camera.h b/include/camera/Camera.h
new file mode 100644
index 0000000..ee2b30c
--- /dev/null
+++ b/include/camera/Camera.h
@@ -0,0 +1,214 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * Copyright (C) 2008 HTC Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_HARDWARE_CAMERA_H
+#define ANDROID_HARDWARE_CAMERA_H
+
+#include <utils/Timers.h>
+#include <camera/ICameraClient.h>
+
+namespace android {
+
+class ISurface;
+
+/*
+ * A set of bit masks for specifying how the received preview frames are
+ * handled before the previewCallback() call.
+ *
+ * The least significant 3 bits of an "int" value are used for this purpose:
+ *
+ * ..... 0 0 0
+ *       ^ ^ ^
+ *       | | |---------> determine whether the callback is enabled or not
+ *       | |-----------> determine whether the callback is one-shot or not
+ *       |-------------> determine whether the frame is copied out or not
+ *
+ * WARNING:
+ * When a frame is sent directly without copying, it is the frame receiver's
+ * responsiblity to make sure that the frame data won't get corrupted by
+ * subsequent preview frames filled by the camera. This flag is recommended
+ * only when copying out data brings significant performance price and the
+ * handling/processing of the received frame data is always faster than
+ * the preview frame rate so that data corruption won't occur.
+ *
+ * For instance,
+ * 1. 0x00 disables the callback. In this case, copy out and one shot bits
+ *    are ignored.
+ * 2. 0x01 enables a callback without copying out the received frames. A
+ *    typical use case is the Camcorder application to avoid making costly
+ *    frame copies.
+ * 3. 0x05 is enabling a callback with frame copied out repeatedly. A typical
+ *    use case is the Camera application.
+ * 4. 0x07 is enabling a callback with frame copied out only once. A typical use
+ *    case is the Barcode scanner application.
+ */
+#define FRAME_CALLBACK_FLAG_ENABLE_MASK              0x01
+#define FRAME_CALLBACK_FLAG_ONE_SHOT_MASK            0x02
+#define FRAME_CALLBACK_FLAG_COPY_OUT_MASK            0x04
+
+// Typical use cases
+#define FRAME_CALLBACK_FLAG_NOOP                     0x00
+#define FRAME_CALLBACK_FLAG_CAMCORDER                0x01
+#define FRAME_CALLBACK_FLAG_CAMERA                   0x05
+#define FRAME_CALLBACK_FLAG_BARCODE_SCANNER          0x07
+
+// msgType in notifyCallback and dataCallback functions
+enum {
+    CAMERA_MSG_ERROR            = 0x001,
+    CAMERA_MSG_SHUTTER          = 0x002,
+    CAMERA_MSG_FOCUS            = 0x004,
+    CAMERA_MSG_ZOOM             = 0x008,
+    CAMERA_MSG_PREVIEW_FRAME    = 0x010,
+    CAMERA_MSG_VIDEO_FRAME      = 0x020,
+    CAMERA_MSG_POSTVIEW_FRAME   = 0x040,
+    CAMERA_MSG_RAW_IMAGE        = 0x080,
+    CAMERA_MSG_COMPRESSED_IMAGE = 0x100,
+    CAMERA_MSG_ALL_MSGS         = 0x1FF
+};
+
+// cmdType in sendCommand functions
+enum {
+    CAMERA_CMD_START_SMOOTH_ZOOM     = 1,
+    CAMERA_CMD_STOP_SMOOTH_ZOOM      = 2,
+    CAMERA_CMD_SET_DISPLAY_ORIENTATION = 3,
+};
+
+// camera fatal errors
+enum {
+    CAMERA_ERROR_UKNOWN  = 1,
+    CAMERA_ERROR_SERVER_DIED = 100
+};
+
+class ICameraService;
+class ICamera;
+class Surface;
+class Mutex;
+class String8;
+
+// ref-counted object for callbacks
+class CameraListener: virtual public RefBase
+{
+public:
+    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2) = 0;
+    virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr) = 0;
+    virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) = 0;
+};
+
+class Camera : public BnCameraClient, public IBinder::DeathRecipient
+{
+public:
+            // construct a camera client from an existing remote
+    static  sp<Camera>  create(const sp<ICamera>& camera);
+    static  sp<Camera>  connect();
+                        ~Camera();
+            void        init();
+
+            status_t    reconnect();
+            void        disconnect();
+            status_t    lock();
+            status_t    unlock();
+
+            status_t    getStatus() { return mStatus; }
+
+            // pass the buffered ISurface to the camera service
+            status_t    setPreviewDisplay(const sp<Surface>& surface);
+            status_t    setPreviewDisplay(const sp<ISurface>& surface);
+
+            // start preview mode, must call setPreviewDisplay first
+            status_t    startPreview();
+
+            // stop preview mode
+            void        stopPreview();
+
+            // get preview state
+            bool        previewEnabled();
+
+            // start recording mode, must call setPreviewDisplay first
+            status_t    startRecording();
+
+            // stop recording mode
+            void        stopRecording();
+
+            // get recording state
+            bool        recordingEnabled();
+
+            // release a recording frame
+            void        releaseRecordingFrame(const sp<IMemory>& mem);
+
+            // autoFocus - status returned from callback
+            status_t    autoFocus();
+
+            // cancel auto focus
+            status_t    cancelAutoFocus();
+
+            // take a picture - picture returned from callback
+            status_t    takePicture();
+
+            // set preview/capture parameters - key/value pairs
+            status_t    setParameters(const String8& params);
+
+            // get preview/capture parameters - key/value pairs
+            String8     getParameters() const;
+
+            // send command to camera driver
+            status_t    sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);
+
+            void        setListener(const sp<CameraListener>& listener);
+            void        setPreviewCallbackFlags(int preview_callback_flag);
+
+    // ICameraClient interface
+    virtual void        notifyCallback(int32_t msgType, int32_t ext, int32_t ext2);
+    virtual void        dataCallback(int32_t msgType, const sp<IMemory>& dataPtr);
+    virtual void        dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
+
+    sp<ICamera>         remote();
+
+private:
+                        Camera();
+                        Camera(const Camera&);
+                        Camera& operator=(const Camera);
+                        virtual void binderDied(const wp<IBinder>& who);
+
+            class DeathNotifier: public IBinder::DeathRecipient
+            {
+            public:
+                DeathNotifier() {
+                }
+
+                virtual void binderDied(const wp<IBinder>& who);
+            };
+
+            static sp<DeathNotifier> mDeathNotifier;
+
+            // helper function to obtain camera service handle
+            static const sp<ICameraService>& getCameraService();
+
+            sp<ICamera>         mCamera;
+            status_t            mStatus;
+
+            sp<CameraListener>  mListener;
+
+            friend class DeathNotifier;
+
+            static  Mutex               mLock;
+            static  sp<ICameraService>  mCameraService;
+
+};
+
+}; // namespace android
+
+#endif