gecko-dev/dom/camera/CameraControlImpl.cpp

763 lines
20 KiB
C++

/* 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/. */
#include "CameraControlImpl.h"
#include "base/basictypes.h"
#include "mozilla/Assertions.h"
#include "mozilla/unused.h"
#include "nsPrintfCString.h"
#include "nsIWeakReferenceUtils.h"
#include "CameraRecorderProfiles.h"
#include "CameraCommon.h"
#include "nsGlobalWindow.h"
#include "DeviceStorageFileDescriptor.h"
#include "CameraControlListener.h"
using namespace mozilla;
nsWeakPtr CameraControlImpl::sCameraThread;
CameraControlImpl::CameraControlImpl(uint32_t aCameraId)
: mListenerLock(PR_NewRWLock(PR_RWLOCK_RANK_NONE, "CameraControlImpl.Listeners.Lock"))
, mCameraId(aCameraId)
, mPreviewState(CameraControlListener::kPreviewStopped)
, mHardwareState(CameraControlListener::kHardwareClosed)
{
DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
// reuse the same camera thread to conserve resources
nsCOMPtr<nsIThread> ct = do_QueryReferent(sCameraThread);
if (ct) {
mCameraThread = ct.forget();
} else {
nsresult rv = NS_NewNamedThread("CameraThread", getter_AddRefs(mCameraThread));
if (NS_FAILED(rv)) {
MOZ_CRASH("Failed to create new Camera Thread");
}
// keep a weak reference to the new thread
sCameraThread = do_GetWeakReference(mCameraThread);
}
// Care must be taken with the mListenerLock read-write lock to prevent
// deadlocks. Currently this is handled by ensuring that any attempts to
// acquire the lock for writing (as in Add/RemoveListener()) happen in a
// runnable dispatched to the Camera Thread--even if the method is being
// called from that thread. This ensures that if a registered listener
// (which is invoked with a read-lock) tries to call Add/RemoveListener(),
// the lock-for-writing attempt won't happen until the listener has
// completed.
//
// Multiple parallel listeners being invoked are not a problem because
// the read-write lock allows multiple simultaneous read-locks.
if (!mListenerLock) {
MOZ_CRASH("Out of memory getting new PRRWLock");
}
}
CameraControlImpl::~CameraControlImpl()
{
MOZ_ASSERT(mListenerLock, "mListenerLock missing in ~CameraControlImpl()");
if (mListenerLock) {
PR_DestroyRWLock(mListenerLock);
mListenerLock = nullptr;
}
}
already_AddRefed<RecorderProfileManager>
CameraControlImpl::GetRecorderProfileManager()
{
return GetRecorderProfileManagerImpl();
}
void
CameraControlImpl::Shutdown()
{
DOM_CAMERA_LOGT("%s:%d\n", __func__, __LINE__);
}
void
CameraControlImpl::OnHardwareStateChange(CameraControlListener::HardwareState aNewState)
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread. On Gonk, it may be called from the camera's
// local binder thread, should the mediaserver process die.
RwLockAutoEnterRead lock(mListenerLock);
if (aNewState == mHardwareState) {
DOM_CAMERA_LOGI("OnHardwareStateChange: state did not change from %d\n", mHardwareState);
return;
}
#ifdef PR_LOGGING
const char* state[] = { "open", "closed", "failed" };
MOZ_ASSERT(aNewState >= 0);
if (static_cast<unsigned int>(aNewState) < sizeof(state) / sizeof(state[0])) {
DOM_CAMERA_LOGI("New hardware state is '%s'\n", state[aNewState]);
} else {
DOM_CAMERA_LOGE("OnHardwareStateChange: got invalid HardwareState value %d\n", aNewState);
}
#endif
mHardwareState = aNewState;
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnHardwareStateChange(mHardwareState);
}
}
void
CameraControlImpl::OnConfigurationChange()
{
MOZ_ASSERT(NS_GetCurrentThread() == mCameraThread);
RwLockAutoEnterRead lock(mListenerLock);
DOM_CAMERA_LOGI("OnConfigurationChange : %d listeners\n", mListeners.Length());
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnConfigurationChange(mCurrentConfiguration);
}
}
void
CameraControlImpl::OnAutoFocusComplete(bool aAutoFocusSucceeded)
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread. On Gonk, it is called from the camera
// library's auto focus thread.
RwLockAutoEnterRead lock(mListenerLock);
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnAutoFocusComplete(aAutoFocusSucceeded);
}
}
void
CameraControlImpl::OnAutoFocusMoving(bool aIsMoving)
{
RwLockAutoEnterRead lock(mListenerLock);
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnAutoFocusMoving(aIsMoving);
}
}
void
CameraControlImpl::OnFacesDetected(const nsTArray<Face>& aFaces)
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread. On Gonk, it is called from the camera
// library's face detection thread.
RwLockAutoEnterRead lock(mListenerLock);
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnFacesDetected(aFaces);
}
}
void
CameraControlImpl::OnTakePictureComplete(uint8_t* aData, uint32_t aLength, const nsAString& aMimeType)
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread. On Gonk, it is called from the camera
// library's snapshot thread.
RwLockAutoEnterRead lock(mListenerLock);
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnTakePictureComplete(aData, aLength, aMimeType);
}
}
void
CameraControlImpl::OnShutter()
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread. On Gonk, it is called from the camera driver's
// preview thread.
RwLockAutoEnterRead lock(mListenerLock);
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnShutter();
}
}
void
CameraControlImpl::OnClosed()
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread.
RwLockAutoEnterRead lock(mListenerLock);
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnHardwareStateChange(CameraControlListener::kHardwareClosed);
}
}
void
CameraControlImpl::OnRecorderStateChange(CameraControlListener::RecorderState aState,
int32_t aStatus, int32_t aTrackNumber)
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread. On Gonk, it is called from the media encoder
// thread.
RwLockAutoEnterRead lock(mListenerLock);
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnRecorderStateChange(aState, aStatus, aTrackNumber);
}
}
void
CameraControlImpl::OnPreviewStateChange(CameraControlListener::PreviewState aNewState)
{
// This callback runs on the Main Thread and the Camera Thread, and
// may run on the local binder thread, should the mediaserver
// process die.
RwLockAutoEnterRead lock(mListenerLock);
if (aNewState == mPreviewState) {
DOM_CAMERA_LOGI("OnPreviewStateChange: state did not change from %d\n", mPreviewState);
return;
}
#ifdef PR_LOGGING
const char* state[] = { "stopped", "paused", "started" };
MOZ_ASSERT(aNewState >= 0);
if (static_cast<unsigned int>(aNewState) < sizeof(state) / sizeof(state[0])) {
DOM_CAMERA_LOGI("New preview state is '%s'\n", state[aNewState]);
} else {
DOM_CAMERA_LOGE("OnPreviewStateChange: got unknown PreviewState value %d\n", aNewState);
}
#endif
mPreviewState = aNewState;
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnPreviewStateChange(mPreviewState);
}
}
bool
CameraControlImpl::OnNewPreviewFrame(layers::Image* aImage, uint32_t aWidth, uint32_t aHeight)
{
// This function runs on neither the Main Thread nor the Camera Thread.
// On Gonk, it is called from the camera driver's preview thread.
RwLockAutoEnterRead lock(mListenerLock);
DOM_CAMERA_LOGI("OnNewPreviewFrame: we have %d preview frame listener(s)\n",
mListeners.Length());
bool consumed = false;
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
consumed = l->OnNewPreviewFrame(aImage, aWidth, aHeight) || consumed;
}
return consumed;
}
void
CameraControlImpl::OnUserError(CameraControlListener::UserContext aContext,
nsresult aError)
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread.
RwLockAutoEnterRead lock(mListenerLock);
#ifdef PR_LOGGING
const char* context[] = {
"StartCamera",
"StopCamera",
"AutoFocus",
"StartFaceDetection",
"StopFaceDetection",
"TakePicture",
"StartRecording",
"StopRecording",
"SetConfiguration",
"StartPreview",
"StopPreview",
"SetPictureSize",
"SetThumbnailSize",
"ResumeContinuousFocus",
"Unspecified"
};
if (static_cast<size_t>(aContext) < sizeof(context) / sizeof(context[0])) {
DOM_CAMERA_LOGW("CameraControlImpl::OnUserError : aContext='%s' (%d), aError=0x%x\n",
context[aContext], aContext, aError);
} else {
DOM_CAMERA_LOGE("CameraControlImpl::OnUserError : aContext=%d, aError=0x%x\n",
aContext, aError);
}
#endif
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnUserError(aContext, aError);
}
}
void
CameraControlImpl::OnSystemError(CameraControlListener::SystemContext aContext,
nsresult aError)
{
// This callback can run on threads other than the Main Thread and
// the Camera Thread.
RwLockAutoEnterRead lock(mListenerLock);
#ifdef PR_LOGGING
const char* context[] = {
"Camera Service"
};
if (static_cast<size_t>(aContext) < sizeof(context) / sizeof(context[0])) {
DOM_CAMERA_LOGW("CameraControlImpl::OnSystemError : aContext='%s' (%d), aError=0x%x\n",
context[aContext], aContext, aError);
} else {
DOM_CAMERA_LOGE("CameraControlImpl::OnSystemError : aContext=%d, aError=0x%x\n",
aContext, aError);
}
#endif
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
CameraControlListener* l = mListeners[i];
l->OnSystemError(aContext, aError);
}
}
// Camera control asynchronous message; these are dispatched from
// the Main Thread to the Camera Thread, where they are consumed.
class CameraControlImpl::ControlMessage : public nsRunnable
{
public:
ControlMessage(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: mCameraControl(aCameraControl)
, mContext(aContext)
{ }
virtual nsresult RunImpl() = 0;
NS_IMETHOD
Run() MOZ_OVERRIDE
{
MOZ_ASSERT(mCameraControl);
MOZ_ASSERT(NS_GetCurrentThread() == mCameraControl->mCameraThread);
nsresult rv = RunImpl();
if (NS_FAILED(rv)) {
nsPrintfCString msg("Camera control API(%d) failed with 0x%x", mContext, rv);
NS_WARNING(msg.get());
mCameraControl->OnUserError(mContext, rv);
}
return NS_OK;
}
protected:
virtual ~ControlMessage() { }
nsRefPtr<CameraControlImpl> mCameraControl;
CameraControlListener::UserContext mContext;
};
nsresult
CameraControlImpl::Dispatch(ControlMessage* aMessage)
{
nsresult rv = mCameraThread->Dispatch(aMessage, NS_DISPATCH_NORMAL);
if (NS_SUCCEEDED(rv)) {
return NS_OK;
}
nsPrintfCString msg("Failed to dispatch camera control message (0x%x)", rv);
NS_WARNING(msg.get());
return NS_ERROR_FAILURE;
}
nsresult
CameraControlImpl::Start(const Configuration* aConfig)
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext,
const Configuration* aConfig)
: ControlMessage(aCameraControl, aContext)
, mHaveInitialConfig(false)
{
if (aConfig) {
mConfig = *aConfig;
mHaveInitialConfig = true;
}
}
nsresult
RunImpl() MOZ_OVERRIDE
{
if (mHaveInitialConfig) {
return mCameraControl->StartImpl(&mConfig);
}
return mCameraControl->StartImpl();
}
protected:
bool mHaveInitialConfig;
Configuration mConfig;
};
return Dispatch(new Message(this, CameraControlListener::kInStartCamera, aConfig));
}
nsresult
CameraControlImpl::SetConfiguration(const Configuration& aConfig)
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext,
const Configuration& aConfig)
: ControlMessage(aCameraControl, aContext)
, mConfig(aConfig)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->SetConfigurationImpl(mConfig);
}
protected:
Configuration mConfig;
};
return Dispatch(new Message(this, CameraControlListener::kInSetConfiguration, aConfig));
}
nsresult
CameraControlImpl::AutoFocus()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->AutoFocusImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInAutoFocus));
}
nsresult
CameraControlImpl::StartFaceDetection()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->StartFaceDetectionImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInStartFaceDetection));
}
nsresult
CameraControlImpl::StopFaceDetection()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->StopFaceDetectionImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInStopFaceDetection));
}
nsresult
CameraControlImpl::TakePicture()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->TakePictureImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInTakePicture));
}
nsresult
CameraControlImpl::StartRecording(DeviceStorageFileDescriptor* aFileDescriptor,
const StartRecordingOptions* aOptions)
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext,
const StartRecordingOptions* aOptions,
DeviceStorageFileDescriptor* aFileDescriptor)
: ControlMessage(aCameraControl, aContext)
, mOptionsPassed(false)
, mFileDescriptor(aFileDescriptor)
{
if (aOptions) {
mOptions = *aOptions;
mOptionsPassed = true;
}
}
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->StartRecordingImpl(mFileDescriptor,
mOptionsPassed ? &mOptions : nullptr);
}
protected:
StartRecordingOptions mOptions;
bool mOptionsPassed;
nsRefPtr<DeviceStorageFileDescriptor> mFileDescriptor;
};
if (!aFileDescriptor) {
return NS_ERROR_INVALID_ARG;
}
return Dispatch(new Message(this, CameraControlListener::kInStartRecording,
aOptions, aFileDescriptor));
}
nsresult
CameraControlImpl::StopRecording()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->StopRecordingImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInStopRecording));
}
nsresult
CameraControlImpl::StartPreview()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->StartPreviewImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInStartPreview));
}
nsresult
CameraControlImpl::StopPreview()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->StopPreviewImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInStopPreview));
}
nsresult
CameraControlImpl::ResumeContinuousFocus()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->ResumeContinuousFocusImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInResumeContinuousFocus));
}
nsresult
CameraControlImpl::Stop()
{
class Message : public ControlMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener::UserContext aContext)
: ControlMessage(aCameraControl, aContext)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
return mCameraControl->StopImpl();
}
};
return Dispatch(new Message(this, CameraControlListener::kInStopCamera));
}
class CameraControlImpl::ListenerMessage : public CameraControlImpl::ControlMessage
{
public:
ListenerMessage(CameraControlImpl* aCameraControl,
CameraControlListener* aListener)
: ControlMessage(aCameraControl, CameraControlListener::kInUnspecified)
, mListener(aListener)
{ }
protected:
nsRefPtr<CameraControlListener> mListener;
};
void
CameraControlImpl::AddListenerImpl(already_AddRefed<CameraControlListener> aListener)
{
RwLockAutoEnterWrite lock(mListenerLock);
CameraControlListener* l = *mListeners.AppendElement() = aListener;
DOM_CAMERA_LOGI("Added camera control listener %p\n", l);
// Update the newly-added listener's state
l->OnConfigurationChange(mCurrentConfiguration);
l->OnHardwareStateChange(mHardwareState);
l->OnPreviewStateChange(mPreviewState);
}
void
CameraControlImpl::AddListener(CameraControlListener* aListener)
{
class Message : public ListenerMessage
{
public:
Message(CameraControlImpl* aCameraControl,
CameraControlListener* aListener)
: ListenerMessage(aCameraControl, aListener)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
mCameraControl->AddListenerImpl(mListener.forget());
return NS_OK;
}
};
if (aListener) {
Dispatch(new Message(this, aListener));
}
}
void
CameraControlImpl::RemoveListenerImpl(CameraControlListener* aListener)
{
RwLockAutoEnterWrite lock(mListenerLock);
nsRefPtr<CameraControlListener> l(aListener);
mListeners.RemoveElement(l);
DOM_CAMERA_LOGI("Removed camera control listener %p\n", l.get());
// XXXmikeh - do we want to notify the listener that it has been removed?
}
void
CameraControlImpl::RemoveListener(CameraControlListener* aListener)
{
class Message : public ListenerMessage
{
public:
Message(CameraControlImpl* aCameraControl, CameraControlListener* aListener)
: ListenerMessage(aCameraControl, aListener)
{ }
nsresult
RunImpl() MOZ_OVERRIDE
{
mCameraControl->RemoveListenerImpl(mListener);
return NS_OK;
}
};
if (aListener) {
Dispatch(new Message(this, aListener));
}
}