The Tor Browser: dom/camera/GonkCameraHwMgr.cpp@97036ab72558 (annotated)

dom/camera/GonkCameraHwMgr.cpp@97036ab72558 (annotated)

dom/camera/GonkCameraHwMgr.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /*
  * Copyright (C) 2012-2014 Mozilla Foundation
  *
  * 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.
  */
 #include "GonkCameraHwMgr.h"
 #include "TestGonkCameraHardware.h"
 #include <binder/IPCThreadState.h>
 #include <sys/system_properties.h>
 #include "base/basictypes.h"
 #include "nsDebug.h"
 #include "mozilla/layers/TextureClient.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/RefPtr.h"
 #include "GonkCameraControl.h"
 #include "GonkNativeWindow.h"
 #include "CameraCommon.h"
 using namespace mozilla;
 using namespace mozilla::layers;
 using namespace android;
 GonkCameraHardware::GonkCameraHardware(mozilla::nsGonkCameraControl* aTarget, uint32_t aCameraId, const sp<Camera>& aCamera)
   : mCameraId(aCameraId)
   , mClosing(false)
   , mNumFrames(0)
   , mCamera(aCamera)
   , mTarget(aTarget)
   , mSensorOrientation(0)
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p (aTarget=%p)\n", __func__, __LINE__, (void*)this, (void*)aTarget);
 }
 void
 GonkCameraHardware::OnNewFrame()
 {
   if (mClosing) {
     return;
   }
   RefPtr<TextureClient> buffer = mNativeWindow->getCurrentBuffer();
   if (!buffer) {
     DOM_CAMERA_LOGW("received null frame");
     return;
   }
   OnNewPreviewFrame(mTarget, buffer);
 }
 // Android data callback
 void
 GonkCameraHardware::postData(int32_t aMsgType, const sp<IMemory>& aDataPtr, camera_frame_metadata_t* metadata)
 {
   if (mClosing) {
     return;
   }
   switch (aMsgType) {
     case CAMERA_MSG_PREVIEW_FRAME:
       // Do nothing
       break;
     case CAMERA_MSG_COMPRESSED_IMAGE:
       if (aDataPtr != nullptr) {
         OnTakePictureComplete(mTarget, static_cast<uint8_t*>(aDataPtr->pointer()), aDataPtr->size());
       } else {
         OnTakePictureError(mTarget);
       }
       break;
     case CAMERA_MSG_PREVIEW_METADATA:
       OnFacesDetected(mTarget, metadata);
       break;
     default:
       DOM_CAMERA_LOGE("Unhandled data callback event %d\n", aMsgType);
       break;
   }
 }
 // Android notify callback
 void
 GonkCameraHardware::notify(int32_t aMsgType, int32_t ext1, int32_t ext2)
 {
   if (mClosing) {
     return;
   }
   switch (aMsgType) {
     case CAMERA_MSG_FOCUS:
       OnAutoFocusComplete(mTarget, !!ext1);
       break;
 #if ANDROID_VERSION >= 16
     case CAMERA_MSG_FOCUS_MOVE:
       OnAutoFocusMoving(mTarget, !!ext1);
       break;
 #endif
     case CAMERA_MSG_SHUTTER:
       OnShutter(mTarget);
       break;
     case CAMERA_MSG_ERROR:
       OnError(mTarget, CameraControlListener::kErrorServiceFailed, ext1, ext2);
       break;
     default:
       DOM_CAMERA_LOGE("Unhandled notify callback event %d\n", aMsgType);
       break;
   }
 }
 void
 GonkCameraHardware::postDataTimestamp(nsecs_t aTimestamp, int32_t aMsgType, const sp<IMemory>& aDataPtr)
 {
   DOM_CAMERA_LOGI("%s",__func__);
   if (mClosing) {
     return;
   }
   if (mListener.get()) {
     DOM_CAMERA_LOGI("Listener registered, posting recording frame!");
     mListener->postDataTimestamp(aTimestamp, aMsgType, aDataPtr);
   } else {
     DOM_CAMERA_LOGW("No listener was set. Drop a recording frame.");
     mCamera->releaseRecordingFrame(aDataPtr);
   }
 }
 nsresult
 GonkCameraHardware::Init()
 {
   DOM_CAMERA_LOGT("%s: this=%p\n", __func__, (void* )this);
   CameraInfo info;
   int rv = Camera::getCameraInfo(mCameraId, &info);
   if (rv != 0) {
     DOM_CAMERA_LOGE("%s: failed to get CameraInfo mCameraId %d\n", __func__, mCameraId);
     return NS_ERROR_FAILURE;
    }
   mRawSensorOrientation = info.orientation;
   mSensorOrientation = mRawSensorOrientation;
   /**
    * Non-V4L2-based camera driver adds extra offset onto picture orientation
    * set by gecko, so we have to adjust it back.
    */
   char propname[PROP_NAME_MAX];
   char prop[PROP_VALUE_MAX];
   int offset = 0;
   snprintf(propname, sizeof(propname), "ro.moz.cam.%d.sensor_offset", mCameraId);
   if (__system_property_get(propname, prop) > 0) {
     offset = clamped(atoi(prop), 0, 270);
     mSensorOrientation += offset;
     mSensorOrientation %= 360;
   }
   DOM_CAMERA_LOGI("Sensor orientation: base=%d, offset=%d, final=%d\n", info.orientation, offset, mSensorOrientation);
   // Disable shutter sound in android CameraService because gaia camera app will play it
   mCamera->sendCommand(CAMERA_CMD_ENABLE_SHUTTER_SOUND, 0, 0);
   mNativeWindow = new GonkNativeWindow();
   mNativeWindow->setNewFrameCallback(this);
   mCamera->setListener(this);
 #if defined(MOZ_WIDGET_GONK)
 #if ANDROID_VERSION >= 19
   mCamera->setPreviewTarget(mNativeWindow->getBufferQueue());
 #elif (ANDROID_VERSION == 17) || (ANDROID_VERSION == 18)
   mCamera->setPreviewTexture(mNativeWindow->getBufferQueue());
 #else
   mCamera->setPreviewTexture(mNativeWindow);
 #endif
 #if ANDROID_VERSION >= 16
   rv = mCamera->sendCommand(CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG, 1, 0);
   if (rv != OK) {
     NS_WARNING("Failed to send command CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG");
   }
 #endif
 #endif
   return NS_OK;
 }
 sp<GonkCameraHardware>
 GonkCameraHardware::Connect(mozilla::nsGonkCameraControl* aTarget, uint32_t aCameraId)
 {
 #if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 18
   sp<Camera> camera = Camera::connect(aCameraId, /* clientPackageName */String16("gonk.camera"), Camera::USE_CALLING_UID);
 #else
   sp<Camera> camera = Camera::connect(aCameraId);
 #endif
   if (camera.get() == nullptr) {
     return nullptr;
   }
   const nsAdoptingCString& test =
     mozilla::Preferences::GetCString("camera.control.test.enabled");
   sp<GonkCameraHardware> cameraHardware;
   if (test.EqualsASCII("hardware")) {
     NS_WARNING("Using test Gonk hardware layer");
     cameraHardware = new TestGonkCameraHardware(aTarget, aCameraId, camera);
   } else {
     cameraHardware = new GonkCameraHardware(aTarget, aCameraId, camera);
   }
   nsresult rv = cameraHardware->Init();
   if (NS_FAILED(rv)) {
     DOM_CAMERA_LOGE("Failed to initialize camera hardware (0x%X)\n", rv);
     return nullptr;
   }
   return cameraHardware;
 }
 void
 GonkCameraHardware::Close()
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, (void*)this);
   mClosing = true;
   mCamera->stopPreview();
   mCamera->disconnect();
   if (mNativeWindow.get()) {
     mNativeWindow->abandon();
   }
   mCamera.clear();
   mNativeWindow.clear();
   // Ensure that ICamera's destructor is actually executed
   IPCThreadState::self()->flushCommands();
 }
 GonkCameraHardware::~GonkCameraHardware()
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, (void*)this);
   mCamera.clear();
   mNativeWindow.clear();
   if (mClosing) {
     return;
   }
   /**
    * Trigger the OnClosed event; the upper layers can't do anything
    * with the hardware layer once they receive this event.
    */
   if (mTarget) {
     OnClosed(mTarget);
   }
 }
 int
 GonkCameraHardware::GetSensorOrientation(uint32_t aType)
 {
   DOM_CAMERA_LOGI("%s\n", __func__);
   switch (aType) {
     case OFFSET_SENSOR_ORIENTATION:
       return mSensorOrientation;
     case RAW_SENSOR_ORIENTATION:
       return mRawSensorOrientation;
     default:
       DOM_CAMERA_LOGE("%s:%d : unknown aType=%d\n", __func__, __LINE__, aType);
       return 0;
   }
 }
 int
 GonkCameraHardware::AutoFocus()
 {
   DOM_CAMERA_LOGI("%s\n", __func__);
   return mCamera->autoFocus();
 }
 int
 GonkCameraHardware::CancelAutoFocus()
 {
   DOM_CAMERA_LOGI("%s\n", __func__);
   return mCamera->cancelAutoFocus();
 }
 int
 GonkCameraHardware::StartFaceDetection()
 {
   DOM_CAMERA_LOGI("%s\n", __func__);
   int rv = INVALID_OPERATION;
 #if ANDROID_VERSION >= 15
   rv = mCamera->sendCommand(CAMERA_CMD_START_FACE_DETECTION, CAMERA_FACE_DETECTION_HW, 0);
 #endif
   if (rv != OK) {
     DOM_CAMERA_LOGE("Start face detection failed with status %d", rv);
   }
   return rv;
 }
 int
 GonkCameraHardware::StopFaceDetection()
 {
   DOM_CAMERA_LOGI("%s\n", __func__);
   int rv = INVALID_OPERATION;
 #if ANDROID_VERSION >= 15
   rv = mCamera->sendCommand(CAMERA_CMD_STOP_FACE_DETECTION, 0, 0);
 #endif
   if (rv != OK) {
     DOM_CAMERA_LOGE("Stop face detection failed with status %d", rv);
   }
   return rv;
 }
 int
 GonkCameraHardware::TakePicture()
 {
   return mCamera->takePicture(CAMERA_MSG_SHUTTER | CAMERA_MSG_COMPRESSED_IMAGE);
 }
 void
 GonkCameraHardware::CancelTakePicture()
 {
   DOM_CAMERA_LOGW("%s: android::Camera do not provide this capability\n", __func__);
 }
 int
 GonkCameraHardware::PushParameters(const GonkCameraParameters& aParams)
 {
   const String8 s = aParams.Flatten();
   return mCamera->setParameters(s);
 }
 int
 GonkCameraHardware::PushParameters(const CameraParameters& aParams)
 {
   String8 s = aParams.flatten();
   return mCamera->setParameters(s);
 }
 nsresult
 GonkCameraHardware::PullParameters(GonkCameraParameters& aParams)
 {
   const String8 s = mCamera->getParameters();
   return aParams.Unflatten(s);
 }
 void
 GonkCameraHardware::PullParameters(CameraParameters& aParams)
 {
   const String8 s = mCamera->getParameters();
   aParams.unflatten(s);
 }
 int
 GonkCameraHardware::StartPreview()
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
   return mCamera->startPreview();
 }
 void
 GonkCameraHardware::StopPreview()
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
   mCamera->stopPreview();
 }
 int
 GonkCameraHardware::StartRecording()
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
   int rv = OK;
   rv = mCamera->startRecording();
   if (rv != OK) {
     DOM_CAMERA_LOGE("mHardware->startRecording() failed with status %d", rv);
   }
   return rv;
 }
 int
 GonkCameraHardware::StopRecording()
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
   mCamera->stopRecording();
   return OK;
 }
 int
 GonkCameraHardware::SetListener(const sp<GonkCameraListener>& aListener)
 {
   mListener = aListener;
   return OK;
 }
 void
 GonkCameraHardware::ReleaseRecordingFrame(const sp<IMemory>& aFrame)
 {
   mCamera->releaseRecordingFrame(aFrame);
 }
 int
 GonkCameraHardware::StoreMetaDataInBuffers(bool aEnabled)
 {
   return mCamera->storeMetaDataInBuffers(aEnabled);
 }

The Tor Browser / annotate

dom/camera/GonkCameraHwMgr.cpp@97036ab72558 (annotated)

dom/camera/GonkCameraHwMgr.cpp