status_t CameraClient::setPreviewWindow(const sp<IBinder>& binder,
const sp<ANativeWindow>& window) {
Mutex::Autolock lock(mLock);
status_t result = checkPidAndHardware();
if (result != NO_ERROR) return result;
// return if no change in surface.
if (binder == mSurface) {
return NO_ERROR;
}
if (window != 0) {
result = native_window_api_connect(window.get(), NATIVE_WINDOW_API_CAMERA);
if (result != NO_ERROR) {
ALOGE("native_window_api_connect failed: %s (%d)", strerror(-result),
result);
return result;
}
}
// If preview has been already started, register preview buffers now.
if (mHardware->previewEnabled()) {
if (window != 0) {
native_window_set_scaling_mode(window.get(),
NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW);
native_window_set_buffers_transform(window.get(), mOrientation);
result = mHardware->setPreviewWindow(window);
}
#ifdef QCOM_HARDWARE
#ifndef NO_UPDATE_PREVIEW
} else {
if (window != 0) {
native_window_set_buffers_transform(window.get(), mOrientation);
}
result = mHardware->setPreviewWindow(window);
#endif
#endif
}
if (result == NO_ERROR) {
// Everything has succeeded. Disconnect the old window and remember the
// new window.
disconnectWindow(mPreviewWindow);
mSurface = binder;
mPreviewWindow = window;
} else {
// Something went wrong after we connected to the new window, so
// disconnect here.
disconnectWindow(window);
}
return result;
}
void CameraClient::disconnect() {
int callingPid = getCallingPid();
LOG1("disconnect E (pid %d)", callingPid);
Mutex::Autolock lock(mLock);
// Allow both client and the media server to disconnect at all times
if (callingPid != mClientPid && callingPid != mServicePid) {
ALOGW("different client - don't disconnect");
return;
}
if (mClientPid <= 0) {
LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid);
return;
}
// Make sure disconnect() is done once and once only, whether it is called
// from the user directly, or called by the destructor.
if (mHardware == 0) return;
LOG1("hardware teardown");
// Before destroying mHardware, we must make sure it's in the
// idle state.
// Turn off all messages.
disableMsgType(CAMERA_MSG_ALL_MSGS);
mHardware->stopPreview();
mHardware->cancelPicture();
// Release the hardware resources.
mHardware->release();
// Release the held ANativeWindow resources.
if (mPreviewWindow != 0) {
#ifdef QCOM_HARDWARE
#ifndef NO_UPDATE_PREVIEW
mHardware->setPreviewWindow(0);
#endif
#endif
disconnectWindow(mPreviewWindow);
mPreviewWindow = 0;
#ifndef QCOM_HARDWARE
mHardware->setPreviewWindow(mPreviewWindow);
#endif
}
mHardware.clear();
CameraService::Client::disconnect();
LOG1("disconnect X (pid %d)", callingPid);
}
void CameraService::Client::disconnect() {
int callingPid = getCallingPid();
LOG1("disconnect E (pid %d)", callingPid);
Mutex::Autolock lock(mLock);
if (checkPid() != NO_ERROR) {
LOGW("different client - don't disconnect");
return;
}
if (mClientPid <= 0) {
LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid);
return;
}
// Make sure disconnect() is done once and once only, whether it is called
// from the user directly, or called by the destructor.
if (mHardware == 0) return;
LOG1("hardware teardown");
// Before destroying mHardware, we must make sure it's in the
// idle state.
// Turn off all messages.
disableMsgType(CAMERA_MSG_ALL_MSGS);
mHardware->stopPreview();
mHardware->cancelPicture();
// Release the hardware resources.
mHardware->release();
// Release the held ANativeWindow resources.
if (mPreviewWindow != 0) {
disconnectWindow(mPreviewWindow);
mPreviewWindow = 0;
mHardware->setPreviewWindow(mPreviewWindow);
}
mHardware.clear();
mCameraService->removeClient(mCameraClient);
mCameraService->setCameraFree(mCameraId);
LOG1("disconnect X (pid %d)", callingPid);
}