From c073ba525404f3416c2824c435d3d926a9892f1b Mon Sep 17 00:00:00 2001
From: Igor Murashkin <iam@google.com>
Date: Tue, 26 Feb 2013 14:32:34 -0800
Subject: camera_client: refactor Camera/ProCamera commonalities into
 BasicCamera

Change-Id: Ie10a4094522d49683657665fe94ab0b7ccd280e9
---
 camera/CameraBase.cpp | 237 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 237 insertions(+)
 create mode 100644 camera/CameraBase.cpp

(limited to 'camera/CameraBase.cpp')

diff --git a/camera/CameraBase.cpp b/camera/CameraBase.cpp
new file mode 100644
index 0000000..9b0e6bf
--- /dev/null
+++ b/camera/CameraBase.cpp
@@ -0,0 +1,237 @@
+/*
+**
+** Copyright (C) 2013, The Android Open Source Project
+**
+** 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.
+*/
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "CameraBase"
+#include <utils/Log.h>
+#include <utils/threads.h>
+#include <utils/Mutex.h>
+
+#include <binder/IPCThreadState.h>
+#include <binder/IServiceManager.h>
+#include <binder/IMemory.h>
+
+#include <camera/CameraBase.h>
+#include <camera/ICameraService.h>
+
+// needed to instantiate
+#include <camera/ProCamera.h>
+#include <camera/Camera.h>
+
+#include <system/camera_metadata.h>
+
+namespace android {
+
+namespace {
+    sp<ICameraService>        gCameraService;
+    const int                 kCameraServicePollDelay = 500000; // 0.5s
+    const char*               kCameraServiceName      = "media.camera";
+
+    Mutex                     gLock;
+
+    class DeathNotifier : public IBinder::DeathRecipient
+    {
+    public:
+        DeathNotifier() {
+        }
+
+        virtual void binderDied(const wp<IBinder>& who) {
+            ALOGV("binderDied");
+            Mutex::Autolock _l(gLock);
+            gCameraService.clear();
+            ALOGW("Camera service died!");
+        }
+    };
+
+    sp<DeathNotifier>         gDeathNotifier;
+}; // namespace anonymous
+
+///////////////////////////////////////////////////////////
+// CameraBase definition
+///////////////////////////////////////////////////////////
+
+// establish binder interface to camera service
+template <typename TCam, typename TCamTraits>
+const sp<ICameraService>& CameraBase<TCam, TCamTraits>::getCameraService()
+{
+    Mutex::Autolock _l(gLock);
+    if (gCameraService.get() == 0) {
+        sp<IServiceManager> sm = defaultServiceManager();
+        sp<IBinder> binder;
+        do {
+            binder = sm->getService(String16(kCameraServiceName));
+            if (binder != 0) {
+                break;
+            }
+            ALOGW("CameraService not published, waiting...");
+            usleep(kCameraServicePollDelay);
+        } while(true);
+        if (gDeathNotifier == NULL) {
+            gDeathNotifier = new DeathNotifier();
+        }
+        binder->linkToDeath(gDeathNotifier);
+        gCameraService = interface_cast<ICameraService>(binder);
+    }
+    ALOGE_IF(gCameraService == 0, "no CameraService!?");
+    return gCameraService;
+}
+
+template <typename TCam, typename TCamTraits>
+sp<TCam> CameraBase<TCam, TCamTraits>::connect(int cameraId,
+                                         const String16& clientPackageName,
+                                               int clientUid)
+{
+    ALOGV("%s: connect", __FUNCTION__);
+    sp<TCam> c = new TCam(cameraId);
+    sp<TCamCallbacks> cl = c;
+    const sp<ICameraService>& cs = getCameraService();
+    if (cs != 0) {
+        c->mCamera = cs->connect(cl, cameraId, clientPackageName, clientUid);
+    }
+    if (c->mCamera != 0) {
+        c->mCamera->asBinder()->linkToDeath(c);
+        c->mStatus = NO_ERROR;
+    } else {
+        c.clear();
+    }
+    return c;
+}
+
+template <typename TCam, typename TCamTraits>
+void CameraBase<TCam, TCamTraits>::disconnect()
+{
+    ALOGV("%s: disconnect", __FUNCTION__);
+    if (mCamera != 0) {
+        mCamera->disconnect();
+        mCamera->asBinder()->unlinkToDeath(this);
+        mCamera = 0;
+    }
+    ALOGV("%s: disconnect (done)", __FUNCTION__);
+}
+
+template <typename TCam, typename TCamTraits>
+CameraBase<TCam, TCamTraits>::CameraBase(int cameraId) :
+    mStatus(UNKNOWN_ERROR),
+    mCameraId(cameraId)
+{
+}
+
+template <typename TCam, typename TCamTraits>
+CameraBase<TCam, TCamTraits>::~CameraBase()
+{
+}
+
+template <typename TCam, typename TCamTraits>
+sp<typename TCamTraits::TCamUser> CameraBase<TCam, TCamTraits>::remote()
+{
+    return mCamera;
+}
+
+template <typename TCam, typename TCamTraits>
+status_t CameraBase<TCam, TCamTraits>::getStatus()
+{
+    return mStatus;
+}
+
+template <typename TCam, typename TCamTraits>
+void CameraBase<TCam, TCamTraits>::binderDied(const wp<IBinder>& who) {
+    ALOGW("mediaserver's remote binder Camera object died");
+    notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_SERVER_DIED, /*ext2*/0);
+}
+
+template <typename TCam, typename TCamTraits>
+void CameraBase<TCam, TCamTraits>::setListener(const sp<TCamListener>& listener)
+{
+    Mutex::Autolock _l(mLock);
+    mListener = listener;
+}
+
+// callback from camera service
+template <typename TCam, typename TCamTraits>
+void CameraBase<TCam, TCamTraits>::notifyCallback(int32_t msgType,
+                                                  int32_t ext1,
+                                                  int32_t ext2)
+{
+    sp<TCamListener> listener;
+    {
+        Mutex::Autolock _l(mLock);
+        listener = mListener;
+    }
+    if (listener != NULL) {
+        listener->notify(msgType, ext1, ext2);
+    }
+}
+
+// callback from camera service when frame or image is ready
+template <typename TCam, typename TCamTraits>
+void CameraBase<TCam, TCamTraits>::dataCallback(int32_t msgType,
+                                                const sp<IMemory>& dataPtr,
+                                                camera_frame_metadata *metadata)
+{
+    sp<TCamListener> listener;
+    {
+        Mutex::Autolock _l(mLock);
+        listener = mListener;
+    }
+    if (listener != NULL) {
+        listener->postData(msgType, dataPtr, metadata);
+    }
+}
+
+// callback from camera service when timestamped frame is ready
+template <typename TCam, typename TCamTraits>
+bool CameraBase<TCam, TCamTraits>::dataCallbackTimestamp(nsecs_t timestamp,
+                                                         int32_t msgType,
+                                                   const sp<IMemory>& dataPtr)
+{
+    sp<TCamListener> listener;
+    {
+        Mutex::Autolock _l(mLock);
+        listener = mListener;
+    }
+    if (listener != NULL) {
+        listener->postDataTimestamp(timestamp, msgType, dataPtr);
+        return true;
+    }
+
+    return false;
+}
+
+template <typename TCam, typename TCamTraits>
+int CameraBase<TCam, TCamTraits>::getNumberOfCameras() {
+    const sp<ICameraService> cs = getCameraService();
+
+    if (!cs.get()) {
+        // as required by the public Java APIs
+        return 0;
+    }
+    return cs->getNumberOfCameras();
+}
+
+// this can be in BaseCamera but it should be an instance method
+template <typename TCam, typename TCamTraits>
+status_t CameraBase<TCam, TCamTraits>::getCameraInfo(int cameraId,
+                               struct CameraInfo* cameraInfo) {
+    const sp<ICameraService>& cs = getCameraService();
+    if (cs == 0) return UNKNOWN_ERROR;
+    return cs->getCameraInfo(cameraId, cameraInfo);
+}
+
+template class CameraBase<ProCamera>;
+template class CameraBase<Camera>;
+
+} // namespace android
-- 
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