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Commit c62f9bd1 authored by Dave Sparks's avatar Dave Sparks
Browse files

Pipe all the camera callbacks to Java to facilitate the addition 

of new features. This will make it easy to add things like zoom
callbacks without modifying the entire camera stack.
Bug 1837832.
parent aae628b4

core/java/android/hardware/Camera.java

+17 −13
Original line number Diff line number Diff line
@@ -39,13 +39,16 @@ import android.os.Message; 
public class Camera {

    private static final String TAG = "Camera";

    

    // These match the enum in libs/android_runtime/android_hardware_Camera.cpp

    private static final int SHUTTER_CALLBACK = 0;

    private static final int RAW_PICTURE_CALLBACK = 1;

    private static final int JPEG_PICTURE_CALLBACK = 2;

    private static final int PREVIEW_CALLBACK = 3;

    private static final int AUTOFOCUS_CALLBACK = 4;

    private static final int ERROR_CALLBACK = 5;

    // These match the enums in frameworks/base/include/ui/Camera.h

    private static final int CAMERA_MSG_ERROR = 0;

    private static final int CAMERA_MSG_SHUTTER = 1;

    private static final int CAMERA_MSG_FOCUS = 2;

    private static final int CAMERA_MSG_ZOOM = 3;

    private static final int CAMERA_MSG_PREVIEW_FRAME = 4;

    private static final int CAMERA_MSG_VIDEO_FRAME = 5;

    private static final int CAMERA_MSG_POSTVIEW_FRAME = 6;

    private static final int CAMERA_MSG_RAW_IMAGE = 7;

    private static final int CAMERA_MSG_COMPRESSED_IMAGE = 8;



    private int mNativeContext; // accessed by native methods

    private EventHandler mEventHandler;
@@ -231,22 +234,23 @@ public class Camera { 
        @Override

        public void handleMessage(Message msg) {

            switch(msg.what) {

            case SHUTTER_CALLBACK:

            case CAMERA_MSG_SHUTTER:

                if (mShutterCallback != null) {

                    mShutterCallback.onShutter();

                }

                return;

            case RAW_PICTURE_CALLBACK:



            case CAMERA_MSG_RAW_IMAGE:

                if (mRawImageCallback != null)

                    mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera);

                return;



            case JPEG_PICTURE_CALLBACK:

            case CAMERA_MSG_COMPRESSED_IMAGE:

                if (mJpegCallback != null)

                    mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera);

                return;

            

            case PREVIEW_CALLBACK:

            case CAMERA_MSG_PREVIEW_FRAME:

                if (mPreviewCallback != null) {

                    mPreviewCallback.onPreviewFrame((byte[])msg.obj, mCamera);

                    if (mOneShot) {
@@ -255,12 +259,12 @@ public class Camera { 
                }

                return;



            case AUTOFOCUS_CALLBACK:

            case CAMERA_MSG_FOCUS:

                if (mAutoFocusCallback != null)

                    mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera);

                return;



            case ERROR_CALLBACK:

            case CAMERA_MSG_ERROR :

                Log.e(TAG, "Error " + msg.arg1);

                if (mErrorCallback != null)

                    mErrorCallback.onError(msg.arg1, mCamera);

core/jni/android_hardware_Camera.cpp

+6 −42
Original line number Diff line number Diff line
@@ -125,37 +125,8 @@ void JNICameraContext::notify(int32_t msgType, int32_t ext1, int32_t ext2) 
        return;

    }

    JNIEnv *env = AndroidRuntime::getJNIEnv();



    // parse message

    switch (msgType) {

    case CAMERA_MSG_ERROR:

        LOGV("errorCallback");

        int error;

        switch (ext1) {

            case DEAD_OBJECT:

                error = kCameraErrorMediaServer;

                break;

            default:

                error = kCameraErrorUnknown;

                break;

        }

        env->CallStaticVoidMethod(mCameraJClass, fields.post_event,

                mCameraJObjectWeak, kErrorCallback, error, 0, NULL);

        break;

    case CAMERA_MSG_FOCUS:

        LOGV("autoFocusCallback");

    env->CallStaticVoidMethod(mCameraJClass, fields.post_event,

                mCameraJObjectWeak, kAutoFocusCallback, ext1, 0, NULL);

        break;

    case CAMERA_MSG_SHUTTER:

        LOGV("shutterCallback");

        env->CallStaticVoidMethod(mCameraJClass, fields.post_event,

                mCameraJObjectWeak, kShutterCallback, 0, 0, NULL);

        break;

    default:

        LOGV("notifyCallback(%d, %d, %d)", msgType, ext1, ext2);

        break;

    }

            mCameraJObjectWeak, msgType, ext1, ext2);

}



void JNICameraContext::copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType)
@@ -203,27 +174,20 @@ void JNICameraContext::postData(int32_t msgType, const sp<IMemory>& dataPtr) 


    // return data based on callback type

    switch(msgType) {

    case CAMERA_MSG_PREVIEW_FRAME:

        LOGV("previewCallback");

        copyAndPost(env, dataPtr, kPreviewCallback);

        break;

    case CAMERA_MSG_VIDEO_FRAME:

        LOGV("recordingCallback");

        // should never happen

        break;

    // don't return raw data to Java

    case CAMERA_MSG_RAW_IMAGE:

        LOGV("rawCallback");

        env->CallStaticVoidMethod(mCameraJClass, fields.post_event,

                mCameraJObjectWeak, kRawCallback, 0, 0, NULL);

        break;

    case CAMERA_MSG_COMPRESSED_IMAGE:

        LOGV("jpegCallback");

        copyAndPost(env, dataPtr, kJpegCallback);

                mCameraJObjectWeak, msgType, 0, 0, NULL);

        break;

    default:

        LOGV("dataCallback(%d, %p)", msgType, dataPtr.get());

        copyAndPost(env, dataPtr, msgType);

        break;

    }



}



// connect to camera service

include/ui/Camera.h

+3 −7
Original line number Diff line number Diff line
@@ -63,16 +63,12 @@ namespace android { 
#define FRAME_CALLBACK_FLAG_CAMERA                   0x05

#define FRAME_CALLBACK_FLAG_BARCODE_SCANNER          0x07



// msgType in notifyCallback function

// msgType in notifyCallback and dataCallback functions

enum {

    CAMERA_MSG_ERROR,

    CAMERA_MSG_ERROR = 0,

    CAMERA_MSG_SHUTTER,

    CAMERA_MSG_FOCUS,

    CAMERA_MSG_ZOOM

};



// msgType in dataCallback function

enum {

    CAMERA_MSG_ZOOM,

    CAMERA_MSG_PREVIEW_FRAME,

    CAMERA_MSG_VIDEO_FRAME,

    CAMERA_MSG_POSTVIEW_FRAME,