blob: b5f78e8a0d10f3c4e93e90276a68ee488f34ff73 [file] [log] [blame]
/*
**
** Copyright (C) 2008, 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 "Camera"
#include <utils/Log.h>
#include <utils/threads.h>
#include <binder/IServiceManager.h>
#include <binder/IMemory.h>
#include <camera/Camera.h>
#include <camera/ICameraService.h>
#include <surfaceflinger/Surface.h>
namespace android {
// client singleton for camera service binder interface
Mutex Camera::mLock;
sp<ICameraService> Camera::mCameraService;
sp<Camera::DeathNotifier> Camera::mDeathNotifier;
// establish binder interface to camera service
const sp<ICameraService>& Camera::getCameraService()
{
Mutex::Autolock _l(mLock);
if (mCameraService.get() == 0) {
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> binder;
do {
binder = sm->getService(String16("media.camera"));
if (binder != 0)
break;
LOGW("CameraService not published, waiting...");
usleep(500000); // 0.5 s
} while(true);
if (mDeathNotifier == NULL) {
mDeathNotifier = new DeathNotifier();
}
binder->linkToDeath(mDeathNotifier);
mCameraService = interface_cast<ICameraService>(binder);
}
LOGE_IF(mCameraService==0, "no CameraService!?");
return mCameraService;
}
// ---------------------------------------------------------------------------
Camera::Camera()
{
init();
}
// construct a camera client from an existing camera remote
sp<Camera> Camera::create(const sp<ICamera>& camera)
{
LOGV("create");
if (camera == 0) {
LOGE("camera remote is a NULL pointer");
return 0;
}
sp<Camera> c = new Camera();
if (camera->connect(c) == NO_ERROR) {
c->mStatus = NO_ERROR;
c->mCamera = camera;
camera->asBinder()->linkToDeath(c);
}
return c;
}
void Camera::init()
{
mStatus = UNKNOWN_ERROR;
}
Camera::~Camera()
{
// We don't need to call disconnect() here because if the CameraService
// thinks we are the owner of the hardware, it will hold a (strong)
// reference to us, and we can't possibly be here. We also don't want to
// call disconnect() here if we are in the same process as mediaserver,
// because we may be invoked by CameraService::Client::connect() and will
// deadlock if we call any method of ICamera here.
}
int32_t Camera::getNumberOfCameras()
{
const sp<ICameraService>& cs = getCameraService();
if (cs == 0) return 0;
return cs->getNumberOfCameras();
}
status_t Camera::getCameraInfo(int cameraId,
struct CameraInfo* cameraInfo) {
const sp<ICameraService>& cs = getCameraService();
if (cs == 0) return UNKNOWN_ERROR;
return cs->getCameraInfo(cameraId, cameraInfo);
}
sp<Camera> Camera::connect(int cameraId)
{
LOGV("connect");
sp<Camera> c = new Camera();
const sp<ICameraService>& cs = getCameraService();
if (cs != 0) {
c->mCamera = cs->connect(c, cameraId);
}
if (c->mCamera != 0) {
c->mCamera->asBinder()->linkToDeath(c);
c->mStatus = NO_ERROR;
} else {
c.clear();
}
return c;
}
void Camera::disconnect()
{
LOGV("disconnect");
if (mCamera != 0) {
mCamera->disconnect();
mCamera->asBinder()->unlinkToDeath(this);
mCamera = 0;
}
}
status_t Camera::reconnect()
{
LOGV("reconnect");
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->connect(this);
}
sp<ICamera> Camera::remote()
{
return mCamera;
}
status_t Camera::lock()
{
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->lock();
}
status_t Camera::unlock()
{
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->unlock();
}
// pass the buffered Surface to the camera service
status_t Camera::setPreviewDisplay(const sp<Surface>& surface)
{
LOGV("setPreviewDisplay(%p)", surface.get());
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
if (surface != 0) {
return c->setPreviewDisplay(surface);
} else {
LOGD("app passed NULL surface");
return c->setPreviewDisplay(0);
}
}
// start preview mode
status_t Camera::startPreview()
{
LOGV("startPreview");
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->startPreview();
}
// start recording mode, must call setPreviewDisplay first
status_t Camera::startRecording()
{
LOGV("startRecording");
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->startRecording();
}
// stop preview mode
void Camera::stopPreview()
{
LOGV("stopPreview");
sp <ICamera> c = mCamera;
if (c == 0) return;
c->stopPreview();
}
// stop recording mode
void Camera::stopRecording()
{
LOGV("stopRecording");
sp <ICamera> c = mCamera;
if (c == 0) return;
c->stopRecording();
}
// release a recording frame
void Camera::releaseRecordingFrame(const sp<IMemory>& mem)
{
LOGV("releaseRecordingFrame");
sp <ICamera> c = mCamera;
if (c == 0) return;
c->releaseRecordingFrame(mem);
}
// get preview state
bool Camera::previewEnabled()
{
LOGV("previewEnabled");
sp <ICamera> c = mCamera;
if (c == 0) return false;
return c->previewEnabled();
}
// get recording state
bool Camera::recordingEnabled()
{
LOGV("recordingEnabled");
sp <ICamera> c = mCamera;
if (c == 0) return false;
return c->recordingEnabled();
}
status_t Camera::autoFocus()
{
LOGV("autoFocus");
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->autoFocus();
}
status_t Camera::cancelAutoFocus()
{
LOGV("cancelAutoFocus");
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->cancelAutoFocus();
}
// take a picture
status_t Camera::takePicture()
{
LOGV("takePicture");
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->takePicture();
}
// set preview/capture parameters - key/value pairs
status_t Camera::setParameters(const String8& params)
{
LOGV("setParameters");
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->setParameters(params);
}
// get preview/capture parameters - key/value pairs
String8 Camera::getParameters() const
{
LOGV("getParameters");
String8 params;
sp <ICamera> c = mCamera;
if (c != 0) params = mCamera->getParameters();
return params;
}
// send command to camera driver
status_t Camera::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
{
LOGV("sendCommand");
sp <ICamera> c = mCamera;
if (c == 0) return NO_INIT;
return c->sendCommand(cmd, arg1, arg2);
}
void Camera::setListener(const sp<CameraListener>& listener)
{
Mutex::Autolock _l(mLock);
mListener = listener;
}
void Camera::setPreviewCallbackFlags(int flag)
{
LOGV("setPreviewCallbackFlags");
sp <ICamera> c = mCamera;
if (c == 0) return;
mCamera->setPreviewCallbackFlag(flag);
}
// callback from camera service
void Camera::notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2)
{
sp<CameraListener> 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
void Camera::dataCallback(int32_t msgType, const sp<IMemory>& dataPtr)
{
sp<CameraListener> listener;
{
Mutex::Autolock _l(mLock);
listener = mListener;
}
if (listener != NULL) {
listener->postData(msgType, dataPtr);
}
}
// callback from camera service when timestamped frame is ready
void Camera::dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr)
{
sp<CameraListener> listener;
{
Mutex::Autolock _l(mLock);
listener = mListener;
}
if (listener != NULL) {
listener->postDataTimestamp(timestamp, msgType, dataPtr);
}
}
void Camera::binderDied(const wp<IBinder>& who) {
LOGW("ICamera died");
notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_SERVER_DIED, 0);
}
void Camera::DeathNotifier::binderDied(const wp<IBinder>& who) {
LOGV("binderDied");
Mutex::Autolock _l(Camera::mLock);
Camera::mCameraService.clear();
LOGW("Camera server died!");
}
}; // namespace android