| /* |
| ** |
| ** 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_TAG "CameraService" |
| |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <pthread.h> |
| |
| #include <binder/IPCThreadState.h> |
| #include <binder/IServiceManager.h> |
| #include <binder/MemoryBase.h> |
| #include <binder/MemoryHeapBase.h> |
| #include <cutils/atomic.h> |
| #include <hardware/hardware.h> |
| #include <media/AudioSystem.h> |
| #include <media/mediaplayer.h> |
| #include <surfaceflinger/ISurface.h> |
| #include <ui/Overlay.h> |
| #include <utils/Errors.h> |
| #include <utils/Log.h> |
| #include <utils/String16.h> |
| |
| #include "CameraService.h" |
| |
| namespace android { |
| |
| // ---------------------------------------------------------------------------- |
| // Logging support -- this is for debugging only |
| // Use "adb shell dumpsys media.camera -v 1" to change it. |
| static volatile int32_t gLogLevel = 0; |
| |
| #define LOG1(...) LOGD_IF(gLogLevel >= 1, __VA_ARGS__); |
| #define LOG2(...) LOGD_IF(gLogLevel >= 2, __VA_ARGS__); |
| |
| static void setLogLevel(int level) { |
| android_atomic_write(level, &gLogLevel); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| static int getCallingPid() { |
| return IPCThreadState::self()->getCallingPid(); |
| } |
| |
| static int getCallingUid() { |
| return IPCThreadState::self()->getCallingUid(); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| // This is ugly and only safe if we never re-create the CameraService, but |
| // should be ok for now. |
| static CameraService *gCameraService; |
| |
| CameraService::CameraService() |
| :mSoundRef(0) |
| { |
| LOGI("CameraService started (pid=%d)", getpid()); |
| |
| mNumberOfCameras = HAL_getNumberOfCameras(); |
| if (mNumberOfCameras > MAX_CAMERAS) { |
| LOGE("Number of cameras(%d) > MAX_CAMERAS(%d).", |
| mNumberOfCameras, MAX_CAMERAS); |
| mNumberOfCameras = MAX_CAMERAS; |
| } |
| |
| for (int i = 0; i < mNumberOfCameras; i++) { |
| setCameraFree(i); |
| } |
| |
| gCameraService = this; |
| } |
| |
| CameraService::~CameraService() { |
| for (int i = 0; i < mNumberOfCameras; i++) { |
| if (mBusy[i]) { |
| LOGE("camera %d is still in use in destructor!", i); |
| } |
| } |
| |
| gCameraService = NULL; |
| } |
| |
| int32_t CameraService::getNumberOfCameras() { |
| return mNumberOfCameras; |
| } |
| |
| status_t CameraService::getCameraInfo(int cameraId, |
| struct CameraInfo* cameraInfo) { |
| if (cameraId < 0 || cameraId >= mNumberOfCameras) { |
| return BAD_VALUE; |
| } |
| |
| HAL_getCameraInfo(cameraId, cameraInfo); |
| return OK; |
| } |
| |
| sp<ICamera> CameraService::connect( |
| const sp<ICameraClient>& cameraClient, int cameraId) { |
| int callingPid = getCallingPid(); |
| LOG1("CameraService::connect E (pid %d, id %d)", callingPid, cameraId); |
| |
| sp<Client> client; |
| if (cameraId < 0 || cameraId >= mNumberOfCameras) { |
| LOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).", |
| callingPid, cameraId); |
| return NULL; |
| } |
| |
| Mutex::Autolock lock(mServiceLock); |
| if (mClient[cameraId] != 0) { |
| client = mClient[cameraId].promote(); |
| if (client != 0) { |
| if (cameraClient->asBinder() == client->getCameraClient()->asBinder()) { |
| LOG1("CameraService::connect X (pid %d) (the same client)", |
| callingPid); |
| return client; |
| } else { |
| LOGW("CameraService::connect X (pid %d) rejected (existing client).", |
| callingPid); |
| return NULL; |
| } |
| } |
| mClient[cameraId].clear(); |
| } |
| |
| if (mBusy[cameraId]) { |
| LOGW("CameraService::connect X (pid %d) rejected" |
| " (camera %d is still busy).", callingPid, cameraId); |
| return NULL; |
| } |
| |
| sp<CameraHardwareInterface> hardware = HAL_openCameraHardware(cameraId); |
| if (hardware == NULL) { |
| LOGE("Fail to open camera hardware (id=%d)", cameraId); |
| return NULL; |
| } |
| client = new Client(this, cameraClient, hardware, cameraId, callingPid); |
| mClient[cameraId] = client; |
| LOG1("CameraService::connect X"); |
| return client; |
| } |
| |
| void CameraService::removeClient(const sp<ICameraClient>& cameraClient) { |
| int callingPid = getCallingPid(); |
| LOG1("CameraService::removeClient E (pid %d)", callingPid); |
| |
| for (int i = 0; i < mNumberOfCameras; i++) { |
| // Declare this before the lock to make absolutely sure the |
| // destructor won't be called with the lock held. |
| sp<Client> client; |
| |
| Mutex::Autolock lock(mServiceLock); |
| |
| // This happens when we have already disconnected (or this is |
| // just another unused camera). |
| if (mClient[i] == 0) continue; |
| |
| // Promote mClient. It can fail if we are called from this path: |
| // Client::~Client() -> disconnect() -> removeClient(). |
| client = mClient[i].promote(); |
| |
| if (client == 0) { |
| mClient[i].clear(); |
| continue; |
| } |
| |
| if (cameraClient->asBinder() == client->getCameraClient()->asBinder()) { |
| // Found our camera, clear and leave. |
| LOG1("removeClient: clear camera %d", i); |
| mClient[i].clear(); |
| break; |
| } |
| } |
| |
| LOG1("CameraService::removeClient X (pid %d)", callingPid); |
| } |
| |
| sp<CameraService::Client> CameraService::getClientById(int cameraId) { |
| if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; |
| return mClient[cameraId].promote(); |
| } |
| |
| status_t CameraService::onTransact( |
| uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) { |
| // Permission checks |
| switch (code) { |
| case BnCameraService::CONNECT: |
| const int pid = getCallingPid(); |
| const int self_pid = getpid(); |
| if (pid != self_pid) { |
| // we're called from a different process, do the real check |
| if (!checkCallingPermission( |
| String16("android.permission.CAMERA"))) { |
| const int uid = getCallingUid(); |
| LOGE("Permission Denial: " |
| "can't use the camera pid=%d, uid=%d", pid, uid); |
| return PERMISSION_DENIED; |
| } |
| } |
| break; |
| } |
| |
| return BnCameraService::onTransact(code, data, reply, flags); |
| } |
| |
| // The reason we need this busy bit is a new CameraService::connect() request |
| // may come in while the previous Client's destructor has not been run or is |
| // still running. If the last strong reference of the previous Client is gone |
| // but the destructor has not been finished, we should not allow the new Client |
| // to be created because we need to wait for the previous Client to tear down |
| // the hardware first. |
| void CameraService::setCameraBusy(int cameraId) { |
| android_atomic_write(1, &mBusy[cameraId]); |
| } |
| |
| void CameraService::setCameraFree(int cameraId) { |
| android_atomic_write(0, &mBusy[cameraId]); |
| } |
| |
| // We share the media players for shutter and recording sound for all clients. |
| // A reference count is kept to determine when we will actually release the |
| // media players. |
| |
| static MediaPlayer* newMediaPlayer(const char *file) { |
| MediaPlayer* mp = new MediaPlayer(); |
| if (mp->setDataSource(file, NULL) == NO_ERROR) { |
| mp->setAudioStreamType(AudioSystem::ENFORCED_AUDIBLE); |
| mp->prepare(); |
| } else { |
| LOGE("Failed to load CameraService sounds: %s", file); |
| return NULL; |
| } |
| return mp; |
| } |
| |
| void CameraService::loadSound() { |
| Mutex::Autolock lock(mSoundLock); |
| LOG1("CameraService::loadSound ref=%d", mSoundRef); |
| if (mSoundRef++) return; |
| |
| mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); |
| mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); |
| } |
| |
| void CameraService::releaseSound() { |
| Mutex::Autolock lock(mSoundLock); |
| LOG1("CameraService::releaseSound ref=%d", mSoundRef); |
| if (--mSoundRef) return; |
| |
| for (int i = 0; i < NUM_SOUNDS; i++) { |
| if (mSoundPlayer[i] != 0) { |
| mSoundPlayer[i]->disconnect(); |
| mSoundPlayer[i].clear(); |
| } |
| } |
| } |
| |
| void CameraService::playSound(sound_kind kind) { |
| LOG1("playSound(%d)", kind); |
| Mutex::Autolock lock(mSoundLock); |
| sp<MediaPlayer> player = mSoundPlayer[kind]; |
| if (player != 0) { |
| // do not play the sound if stream volume is 0 |
| // (typically because ringer mode is silent). |
| int index; |
| AudioSystem::getStreamVolumeIndex(AudioSystem::ENFORCED_AUDIBLE, &index); |
| if (index != 0) { |
| player->seekTo(0); |
| player->start(); |
| } |
| } |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| CameraService::Client::Client(const sp<CameraService>& cameraService, |
| const sp<ICameraClient>& cameraClient, |
| const sp<CameraHardwareInterface>& hardware, |
| int cameraId, int clientPid) { |
| int callingPid = getCallingPid(); |
| LOG1("Client::Client E (pid %d)", callingPid); |
| |
| mCameraService = cameraService; |
| mCameraClient = cameraClient; |
| mHardware = hardware; |
| mCameraId = cameraId; |
| mClientPid = clientPid; |
| mUseOverlay = mHardware->useOverlay(); |
| mMsgEnabled = 0; |
| |
| mHardware->setCallbacks(notifyCallback, |
| dataCallback, |
| dataCallbackTimestamp, |
| (void *)cameraId); |
| |
| // Enable zoom, error, and focus messages by default |
| enableMsgType(CAMERA_MSG_ERROR | |
| CAMERA_MSG_ZOOM | |
| CAMERA_MSG_FOCUS); |
| mOverlayW = 0; |
| mOverlayH = 0; |
| |
| // Callback is disabled by default |
| mPreviewCallbackFlag = FRAME_CALLBACK_FLAG_NOOP; |
| mOrientation = 0; |
| cameraService->setCameraBusy(cameraId); |
| cameraService->loadSound(); |
| LOG1("Client::Client X (pid %d)", callingPid); |
| } |
| |
| static void *unregister_surface(void *arg) { |
| ISurface *surface = (ISurface *)arg; |
| surface->unregisterBuffers(); |
| IPCThreadState::self()->flushCommands(); |
| return NULL; |
| } |
| |
| // tear down the client |
| CameraService::Client::~Client() { |
| int callingPid = getCallingPid(); |
| LOG1("Client::~Client E (pid %d, this %p)", callingPid, this); |
| |
| if (mSurface != 0 && !mUseOverlay) { |
| pthread_t thr; |
| // We unregister the buffers in a different thread because binder does |
| // not let us make sychronous transactions in a binder destructor (that |
| // is, upon our reaching a refcount of zero.) |
| pthread_create(&thr, |
| NULL, // attr |
| unregister_surface, |
| mSurface.get()); |
| pthread_join(thr, NULL); |
| } |
| |
| // set mClientPid to let disconnet() tear down the hardware |
| mClientPid = callingPid; |
| disconnect(); |
| mCameraService->releaseSound(); |
| LOG1("Client::~Client X (pid %d, this %p)", callingPid, this); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| status_t CameraService::Client::checkPid() const { |
| int callingPid = getCallingPid(); |
| if (callingPid == mClientPid) return NO_ERROR; |
| |
| LOGW("attempt to use a locked camera from a different process" |
| " (old pid %d, new pid %d)", mClientPid, callingPid); |
| return EBUSY; |
| } |
| |
| status_t CameraService::Client::checkPidAndHardware() const { |
| status_t result = checkPid(); |
| if (result != NO_ERROR) return result; |
| if (mHardware == 0) { |
| LOGE("attempt to use a camera after disconnect() (pid %d)", getCallingPid()); |
| return INVALID_OPERATION; |
| } |
| return NO_ERROR; |
| } |
| |
| status_t CameraService::Client::lock() { |
| int callingPid = getCallingPid(); |
| LOG1("lock (pid %d)", callingPid); |
| Mutex::Autolock lock(mLock); |
| |
| // lock camera to this client if the the camera is unlocked |
| if (mClientPid == 0) { |
| mClientPid = callingPid; |
| return NO_ERROR; |
| } |
| |
| // returns NO_ERROR if the client already owns the camera, EBUSY otherwise |
| return checkPid(); |
| } |
| |
| status_t CameraService::Client::unlock() { |
| int callingPid = getCallingPid(); |
| LOG1("unlock (pid %d)", callingPid); |
| Mutex::Autolock lock(mLock); |
| |
| // allow anyone to use camera (after they lock the camera) |
| status_t result = checkPid(); |
| if (result == NO_ERROR) { |
| mClientPid = 0; |
| LOG1("clear mCameraClient (pid %d)", callingPid); |
| // we need to remove the reference to ICameraClient so that when the app |
| // goes away, the reference count goes to 0. |
| mCameraClient.clear(); |
| } |
| return result; |
| } |
| |
| // connect a new client to the camera |
| status_t CameraService::Client::connect(const sp<ICameraClient>& client) { |
| int callingPid = getCallingPid(); |
| LOG1("connect E (pid %d)", callingPid); |
| Mutex::Autolock lock(mLock); |
| |
| if (mClientPid != 0 && checkPid() != NO_ERROR) { |
| LOGW("Tried to connect to a locked camera (old pid %d, new pid %d)", |
| mClientPid, callingPid); |
| return EBUSY; |
| } |
| |
| if (mCameraClient != 0 && (client->asBinder() == mCameraClient->asBinder())) { |
| LOG1("Connect to the same client"); |
| return NO_ERROR; |
| } |
| |
| mPreviewCallbackFlag = FRAME_CALLBACK_FLAG_NOOP; |
| mClientPid = callingPid; |
| mCameraClient = client; |
| |
| LOG1("connect X (pid %d)", callingPid); |
| return NO_ERROR; |
| } |
| |
| 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 overlay resources. |
| if (mUseOverlay) { |
| mOverlayRef = 0; |
| } |
| mHardware.clear(); |
| |
| mCameraService->removeClient(mCameraClient); |
| mCameraService->setCameraFree(mCameraId); |
| |
| LOG1("disconnect X (pid %d)", callingPid); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| // set the ISurface that the preview will use |
| status_t CameraService::Client::setPreviewDisplay(const sp<ISurface>& surface) { |
| LOG1("setPreviewDisplay(%p) (pid %d)", surface.get(), getCallingPid()); |
| Mutex::Autolock lock(mLock); |
| status_t result = checkPidAndHardware(); |
| if (result != NO_ERROR) return result; |
| |
| result = NO_ERROR; |
| |
| // return if no change in surface. |
| // asBinder() is safe on NULL (returns NULL) |
| if (surface->asBinder() == mSurface->asBinder()) { |
| return result; |
| } |
| |
| if (mSurface != 0) { |
| LOG1("clearing old preview surface %p", mSurface.get()); |
| if (mUseOverlay) { |
| // Force the destruction of any previous overlay |
| sp<Overlay> dummy; |
| mHardware->setOverlay(dummy); |
| } else { |
| mSurface->unregisterBuffers(); |
| } |
| } |
| mSurface = surface; |
| mOverlayRef = 0; |
| // If preview has been already started, set overlay or register preview |
| // buffers now. |
| if (mHardware->previewEnabled()) { |
| if (mUseOverlay) { |
| result = setOverlay(); |
| } else if (mSurface != 0) { |
| result = registerPreviewBuffers(); |
| } |
| } |
| |
| return result; |
| } |
| |
| status_t CameraService::Client::registerPreviewBuffers() { |
| int w, h; |
| CameraParameters params(mHardware->getParameters()); |
| params.getPreviewSize(&w, &h); |
| |
| // FIXME: don't use a hardcoded format here. |
| ISurface::BufferHeap buffers(w, h, w, h, |
| HAL_PIXEL_FORMAT_YCrCb_420_SP, |
| mOrientation, |
| 0, |
| mHardware->getPreviewHeap()); |
| |
| status_t result = mSurface->registerBuffers(buffers); |
| if (result != NO_ERROR) { |
| LOGE("registerBuffers failed with status %d", result); |
| } |
| return result; |
| } |
| |
| status_t CameraService::Client::setOverlay() { |
| int w, h; |
| CameraParameters params(mHardware->getParameters()); |
| params.getPreviewSize(&w, &h); |
| |
| if (w != mOverlayW || h != mOverlayH) { |
| // Force the destruction of any previous overlay |
| sp<Overlay> dummy; |
| mHardware->setOverlay(dummy); |
| mOverlayRef = 0; |
| } |
| |
| status_t result = NO_ERROR; |
| if (mSurface == 0) { |
| result = mHardware->setOverlay(NULL); |
| } else { |
| if (mOverlayRef == 0) { |
| // FIXME: |
| // Surfaceflinger may hold onto the previous overlay reference for some |
| // time after we try to destroy it. retry a few times. In the future, we |
| // should make the destroy call block, or possibly specify that we can |
| // wait in the createOverlay call if the previous overlay is in the |
| // process of being destroyed. |
| for (int retry = 0; retry < 50; ++retry) { |
| mOverlayRef = mSurface->createOverlay(w, h, OVERLAY_FORMAT_DEFAULT, |
| mOrientation); |
| if (mOverlayRef != 0) break; |
| LOGW("Overlay create failed - retrying"); |
| usleep(20000); |
| } |
| if (mOverlayRef == 0) { |
| LOGE("Overlay Creation Failed!"); |
| return -EINVAL; |
| } |
| result = mHardware->setOverlay(new Overlay(mOverlayRef)); |
| } |
| } |
| if (result != NO_ERROR) { |
| LOGE("mHardware->setOverlay() failed with status %d\n", result); |
| return result; |
| } |
| |
| mOverlayW = w; |
| mOverlayH = h; |
| |
| return result; |
| } |
| |
| // set the preview callback flag to affect how the received frames from |
| // preview are handled. |
| void CameraService::Client::setPreviewCallbackFlag(int callback_flag) { |
| LOG1("setPreviewCallbackFlag(%d) (pid %d)", callback_flag, getCallingPid()); |
| Mutex::Autolock lock(mLock); |
| if (checkPidAndHardware() != NO_ERROR) return; |
| |
| mPreviewCallbackFlag = callback_flag; |
| |
| // If we don't use overlay, we always need the preview frame for display. |
| // If we do use overlay, we only need the preview frame if the user |
| // wants the data. |
| if (mUseOverlay) { |
| if(mPreviewCallbackFlag & FRAME_CALLBACK_FLAG_ENABLE_MASK) { |
| enableMsgType(CAMERA_MSG_PREVIEW_FRAME); |
| } else { |
| disableMsgType(CAMERA_MSG_PREVIEW_FRAME); |
| } |
| } |
| } |
| |
| // start preview mode |
| status_t CameraService::Client::startPreview() { |
| LOG1("startPreview (pid %d)", getCallingPid()); |
| return startCameraMode(CAMERA_PREVIEW_MODE); |
| } |
| |
| // start recording mode |
| status_t CameraService::Client::startRecording() { |
| LOG1("startRecording (pid %d)", getCallingPid()); |
| return startCameraMode(CAMERA_RECORDING_MODE); |
| } |
| |
| // start preview or recording |
| status_t CameraService::Client::startCameraMode(camera_mode mode) { |
| LOG1("startCameraMode(%d)", mode); |
| Mutex::Autolock lock(mLock); |
| status_t result = checkPidAndHardware(); |
| if (result != NO_ERROR) return result; |
| |
| switch(mode) { |
| case CAMERA_PREVIEW_MODE: |
| if (mSurface == 0) { |
| LOG1("mSurface is not set yet."); |
| // still able to start preview in this case. |
| } |
| return startPreviewMode(); |
| case CAMERA_RECORDING_MODE: |
| if (mSurface == 0) { |
| LOGE("mSurface must be set before startRecordingMode."); |
| return INVALID_OPERATION; |
| } |
| return startRecordingMode(); |
| default: |
| return UNKNOWN_ERROR; |
| } |
| } |
| |
| status_t CameraService::Client::startPreviewMode() { |
| LOG1("startPreviewMode"); |
| status_t result = NO_ERROR; |
| |
| // if preview has been enabled, nothing needs to be done |
| if (mHardware->previewEnabled()) { |
| return NO_ERROR; |
| } |
| |
| if (mUseOverlay) { |
| // If preview display has been set, set overlay now. |
| if (mSurface != 0) { |
| result = setOverlay(); |
| } |
| if (result != NO_ERROR) return result; |
| result = mHardware->startPreview(); |
| } else { |
| enableMsgType(CAMERA_MSG_PREVIEW_FRAME); |
| result = mHardware->startPreview(); |
| if (result != NO_ERROR) return result; |
| // If preview display has been set, register preview buffers now. |
| if (mSurface != 0) { |
| // Unregister here because the surface may be previously registered |
| // with the raw (snapshot) heap. |
| mSurface->unregisterBuffers(); |
| result = registerPreviewBuffers(); |
| } |
| } |
| return result; |
| } |
| |
| status_t CameraService::Client::startRecordingMode() { |
| LOG1("startRecordingMode"); |
| status_t result = NO_ERROR; |
| |
| // if recording has been enabled, nothing needs to be done |
| if (mHardware->recordingEnabled()) { |
| return NO_ERROR; |
| } |
| |
| // if preview has not been started, start preview first |
| if (!mHardware->previewEnabled()) { |
| result = startPreviewMode(); |
| if (result != NO_ERROR) { |
| return result; |
| } |
| } |
| |
| // start recording mode |
| enableMsgType(CAMERA_MSG_VIDEO_FRAME); |
| mCameraService->playSound(SOUND_RECORDING); |
| result = mHardware->startRecording(); |
| if (result != NO_ERROR) { |
| LOGE("mHardware->startRecording() failed with status %d", result); |
| } |
| return result; |
| } |
| |
| // stop preview mode |
| void CameraService::Client::stopPreview() { |
| LOG1("stopPreview (pid %d)", getCallingPid()); |
| Mutex::Autolock lock(mLock); |
| if (checkPidAndHardware() != NO_ERROR) return; |
| |
| disableMsgType(CAMERA_MSG_PREVIEW_FRAME); |
| mHardware->stopPreview(); |
| |
| if (mSurface != 0 && !mUseOverlay) { |
| mSurface->unregisterBuffers(); |
| } |
| |
| mPreviewBuffer.clear(); |
| } |
| |
| // stop recording mode |
| void CameraService::Client::stopRecording() { |
| LOG1("stopRecording (pid %d)", getCallingPid()); |
| Mutex::Autolock lock(mLock); |
| if (checkPidAndHardware() != NO_ERROR) return; |
| |
| mCameraService->playSound(SOUND_RECORDING); |
| disableMsgType(CAMERA_MSG_VIDEO_FRAME); |
| mHardware->stopRecording(); |
| |
| mPreviewBuffer.clear(); |
| } |
| |
| // release a recording frame |
| void CameraService::Client::releaseRecordingFrame(const sp<IMemory>& mem) { |
| Mutex::Autolock lock(mLock); |
| if (checkPidAndHardware() != NO_ERROR) return; |
| mHardware->releaseRecordingFrame(mem); |
| } |
| |
| bool CameraService::Client::previewEnabled() { |
| LOG1("previewEnabled (pid %d)", getCallingPid()); |
| |
| Mutex::Autolock lock(mLock); |
| if (checkPidAndHardware() != NO_ERROR) return false; |
| return mHardware->previewEnabled(); |
| } |
| |
| bool CameraService::Client::recordingEnabled() { |
| LOG1("recordingEnabled (pid %d)", getCallingPid()); |
| |
| Mutex::Autolock lock(mLock); |
| if (checkPidAndHardware() != NO_ERROR) return false; |
| return mHardware->recordingEnabled(); |
| } |
| |
| status_t CameraService::Client::autoFocus() { |
| LOG1("autoFocus (pid %d)", getCallingPid()); |
| |
| Mutex::Autolock lock(mLock); |
| status_t result = checkPidAndHardware(); |
| if (result != NO_ERROR) return result; |
| |
| return mHardware->autoFocus(); |
| } |
| |
| status_t CameraService::Client::cancelAutoFocus() { |
| LOG1("cancelAutoFocus (pid %d)", getCallingPid()); |
| |
| Mutex::Autolock lock(mLock); |
| status_t result = checkPidAndHardware(); |
| if (result != NO_ERROR) return result; |
| |
| return mHardware->cancelAutoFocus(); |
| } |
| |
| // take a picture - image is returned in callback |
| status_t CameraService::Client::takePicture() { |
| LOG1("takePicture (pid %d)", getCallingPid()); |
| |
| Mutex::Autolock lock(mLock); |
| status_t result = checkPidAndHardware(); |
| if (result != NO_ERROR) return result; |
| |
| enableMsgType(CAMERA_MSG_SHUTTER | |
| CAMERA_MSG_POSTVIEW_FRAME | |
| CAMERA_MSG_RAW_IMAGE | |
| CAMERA_MSG_COMPRESSED_IMAGE); |
| |
| return mHardware->takePicture(); |
| } |
| |
| // set preview/capture parameters - key/value pairs |
| status_t CameraService::Client::setParameters(const String8& params) { |
| LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); |
| |
| Mutex::Autolock lock(mLock); |
| status_t result = checkPidAndHardware(); |
| if (result != NO_ERROR) return result; |
| |
| CameraParameters p(params); |
| return mHardware->setParameters(p); |
| } |
| |
| // get preview/capture parameters - key/value pairs |
| String8 CameraService::Client::getParameters() const { |
| Mutex::Autolock lock(mLock); |
| if (checkPidAndHardware() != NO_ERROR) return String8(); |
| |
| String8 params(mHardware->getParameters().flatten()); |
| LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); |
| return params; |
| } |
| |
| status_t CameraService::Client::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { |
| LOG1("sendCommand (pid %d)", getCallingPid()); |
| Mutex::Autolock lock(mLock); |
| status_t result = checkPidAndHardware(); |
| if (result != NO_ERROR) return result; |
| |
| if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { |
| // The orientation cannot be set during preview. |
| if (mHardware->previewEnabled()) { |
| return INVALID_OPERATION; |
| } |
| switch (arg1) { |
| case 0: |
| mOrientation = ISurface::BufferHeap::ROT_0; |
| break; |
| case 90: |
| mOrientation = ISurface::BufferHeap::ROT_90; |
| break; |
| case 180: |
| mOrientation = ISurface::BufferHeap::ROT_180; |
| break; |
| case 270: |
| mOrientation = ISurface::BufferHeap::ROT_270; |
| break; |
| default: |
| return BAD_VALUE; |
| } |
| return OK; |
| } |
| |
| return mHardware->sendCommand(cmd, arg1, arg2); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| void CameraService::Client::enableMsgType(int32_t msgType) { |
| android_atomic_or(msgType, &mMsgEnabled); |
| mHardware->enableMsgType(msgType); |
| } |
| |
| void CameraService::Client::disableMsgType(int32_t msgType) { |
| android_atomic_and(~msgType, &mMsgEnabled); |
| mHardware->disableMsgType(msgType); |
| } |
| |
| #define CHECK_MESSAGE_INTERVAL 10 // 10ms |
| bool CameraService::Client::lockIfMessageWanted(int32_t msgType) { |
| int sleepCount = 0; |
| while (mMsgEnabled & msgType) { |
| if (mLock.tryLock() == NO_ERROR) { |
| if (sleepCount > 0) { |
| LOG1("lockIfMessageWanted(%d): waited for %d ms", |
| msgType, sleepCount * CHECK_MESSAGE_INTERVAL); |
| } |
| return true; |
| } |
| if (sleepCount++ == 0) { |
| LOG1("lockIfMessageWanted(%d): enter sleep", msgType); |
| } |
| usleep(CHECK_MESSAGE_INTERVAL * 1000); |
| } |
| LOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); |
| return false; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| // Converts from a raw pointer to the client to a strong pointer during a |
| // hardware callback. This requires the callbacks only happen when the client |
| // is still alive. |
| sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) { |
| sp<Client> client = gCameraService->getClientById((int) user); |
| |
| // This could happen if the Client is in the process of shutting down (the |
| // last strong reference is gone, but the destructor hasn't finished |
| // stopping the hardware). |
| if (client == 0) return NULL; |
| |
| // The checks below are not necessary and are for debugging only. |
| if (client->mCameraService.get() != gCameraService) { |
| LOGE("mismatch service!"); |
| return NULL; |
| } |
| |
| if (client->mHardware == 0) { |
| LOGE("mHardware == 0: callback after disconnect()?"); |
| return NULL; |
| } |
| |
| return client; |
| } |
| |
| // Callback messages can be dispatched to internal handlers or pass to our |
| // client's callback functions, depending on the message type. |
| // |
| // notifyCallback: |
| // CAMERA_MSG_SHUTTER handleShutter |
| // (others) c->notifyCallback |
| // dataCallback: |
| // CAMERA_MSG_PREVIEW_FRAME handlePreviewData |
| // CAMERA_MSG_POSTVIEW_FRAME handlePostview |
| // CAMERA_MSG_RAW_IMAGE handleRawPicture |
| // CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture |
| // (others) c->dataCallback |
| // dataCallbackTimestamp |
| // (others) c->dataCallbackTimestamp |
| // |
| // NOTE: the *Callback functions grab mLock of the client before passing |
| // control to handle* functions. So the handle* functions must release the |
| // lock before calling the ICameraClient's callbacks, so those callbacks can |
| // invoke methods in the Client class again (For example, the preview frame |
| // callback may want to releaseRecordingFrame). The handle* functions must |
| // release the lock after all accesses to member variables, so it must be |
| // handled very carefully. |
| |
| void CameraService::Client::notifyCallback(int32_t msgType, int32_t ext1, |
| int32_t ext2, void* user) { |
| LOG2("notifyCallback(%d)", msgType); |
| |
| sp<Client> client = getClientFromCookie(user); |
| if (client == 0) return; |
| if (!client->lockIfMessageWanted(msgType)) return; |
| |
| switch (msgType) { |
| case CAMERA_MSG_SHUTTER: |
| // ext1 is the dimension of the yuv picture. |
| client->handleShutter((image_rect_type *)ext1); |
| break; |
| default: |
| client->handleGenericNotify(msgType, ext1, ext2); |
| break; |
| } |
| } |
| |
| void CameraService::Client::dataCallback(int32_t msgType, |
| const sp<IMemory>& dataPtr, void* user) { |
| LOG2("dataCallback(%d)", msgType); |
| |
| sp<Client> client = getClientFromCookie(user); |
| if (client == 0) return; |
| if (!client->lockIfMessageWanted(msgType)) return; |
| |
| if (dataPtr == 0) { |
| LOGE("Null data returned in data callback"); |
| client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); |
| return; |
| } |
| |
| switch (msgType) { |
| case CAMERA_MSG_PREVIEW_FRAME: |
| client->handlePreviewData(dataPtr); |
| break; |
| case CAMERA_MSG_POSTVIEW_FRAME: |
| client->handlePostview(dataPtr); |
| break; |
| case CAMERA_MSG_RAW_IMAGE: |
| client->handleRawPicture(dataPtr); |
| break; |
| case CAMERA_MSG_COMPRESSED_IMAGE: |
| client->handleCompressedPicture(dataPtr); |
| break; |
| default: |
| client->handleGenericData(msgType, dataPtr); |
| break; |
| } |
| } |
| |
| void CameraService::Client::dataCallbackTimestamp(nsecs_t timestamp, |
| int32_t msgType, const sp<IMemory>& dataPtr, void* user) { |
| LOG2("dataCallbackTimestamp(%d)", msgType); |
| |
| sp<Client> client = getClientFromCookie(user); |
| if (client == 0) return; |
| if (!client->lockIfMessageWanted(msgType)) return; |
| |
| if (dataPtr == 0) { |
| LOGE("Null data returned in data with timestamp callback"); |
| client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); |
| return; |
| } |
| |
| client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); |
| } |
| |
| // snapshot taken callback |
| // "size" is the width and height of yuv picture for registerBuffer. |
| // If it is NULL, use the picture size from parameters. |
| void CameraService::Client::handleShutter(image_rect_type *size) { |
| mCameraService->playSound(SOUND_SHUTTER); |
| |
| // Screen goes black after the buffer is unregistered. |
| if (mSurface != 0 && !mUseOverlay) { |
| mSurface->unregisterBuffers(); |
| } |
| |
| sp<ICameraClient> c = mCameraClient; |
| if (c != 0) { |
| mLock.unlock(); |
| c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); |
| if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; |
| } |
| disableMsgType(CAMERA_MSG_SHUTTER); |
| |
| // It takes some time before yuvPicture callback to be called. |
| // Register the buffer for raw image here to reduce latency. |
| if (mSurface != 0 && !mUseOverlay) { |
| int w, h; |
| CameraParameters params(mHardware->getParameters()); |
| if (size == NULL) { |
| params.getPictureSize(&w, &h); |
| } else { |
| w = size->width; |
| h = size->height; |
| w &= ~1; |
| h &= ~1; |
| LOG1("Snapshot image width=%d, height=%d", w, h); |
| } |
| // FIXME: don't use hardcoded format constants here |
| ISurface::BufferHeap buffers(w, h, w, h, |
| HAL_PIXEL_FORMAT_YCrCb_420_SP, mOrientation, 0, |
| mHardware->getRawHeap()); |
| |
| mSurface->registerBuffers(buffers); |
| IPCThreadState::self()->flushCommands(); |
| } |
| |
| mLock.unlock(); |
| } |
| |
| // preview callback - frame buffer update |
| void CameraService::Client::handlePreviewData(const sp<IMemory>& mem) { |
| ssize_t offset; |
| size_t size; |
| sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); |
| |
| if (!mUseOverlay) { |
| if (mSurface != 0) { |
| mSurface->postBuffer(offset); |
| } |
| } |
| |
| // local copy of the callback flags |
| int flags = mPreviewCallbackFlag; |
| |
| // is callback enabled? |
| if (!(flags & FRAME_CALLBACK_FLAG_ENABLE_MASK)) { |
| // If the enable bit is off, the copy-out and one-shot bits are ignored |
| LOG2("frame callback is disabled"); |
| mLock.unlock(); |
| return; |
| } |
| |
| // hold a strong pointer to the client |
| sp<ICameraClient> c = mCameraClient; |
| |
| // clear callback flags if no client or one-shot mode |
| if (c == 0 || (mPreviewCallbackFlag & FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { |
| LOG2("Disable preview callback"); |
| mPreviewCallbackFlag &= ~(FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | |
| FRAME_CALLBACK_FLAG_COPY_OUT_MASK | |
| FRAME_CALLBACK_FLAG_ENABLE_MASK); |
| if (mUseOverlay) { |
| disableMsgType(CAMERA_MSG_PREVIEW_FRAME); |
| } |
| } |
| |
| if (c != 0) { |
| // Is the received frame copied out or not? |
| if (flags & FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { |
| LOG2("frame is copied"); |
| copyFrameAndPostCopiedFrame(c, heap, offset, size); |
| } else { |
| LOG2("frame is forwarded"); |
| mLock.unlock(); |
| c->dataCallback(CAMERA_MSG_PREVIEW_FRAME, mem); |
| } |
| } else { |
| mLock.unlock(); |
| } |
| } |
| |
| // picture callback - postview image ready |
| void CameraService::Client::handlePostview(const sp<IMemory>& mem) { |
| disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); |
| |
| sp<ICameraClient> c = mCameraClient; |
| mLock.unlock(); |
| if (c != 0) { |
| c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem); |
| } |
| } |
| |
| // picture callback - raw image ready |
| void CameraService::Client::handleRawPicture(const sp<IMemory>& mem) { |
| disableMsgType(CAMERA_MSG_RAW_IMAGE); |
| |
| ssize_t offset; |
| size_t size; |
| sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); |
| |
| // Put the YUV version of the snapshot in the preview display. |
| if (mSurface != 0 && !mUseOverlay) { |
| mSurface->postBuffer(offset); |
| } |
| |
| sp<ICameraClient> c = mCameraClient; |
| mLock.unlock(); |
| if (c != 0) { |
| c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem); |
| } |
| } |
| |
| // picture callback - compressed picture ready |
| void CameraService::Client::handleCompressedPicture(const sp<IMemory>& mem) { |
| disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); |
| |
| sp<ICameraClient> c = mCameraClient; |
| mLock.unlock(); |
| if (c != 0) { |
| c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem); |
| } |
| } |
| |
| |
| void CameraService::Client::handleGenericNotify(int32_t msgType, |
| int32_t ext1, int32_t ext2) { |
| sp<ICameraClient> c = mCameraClient; |
| mLock.unlock(); |
| if (c != 0) { |
| c->notifyCallback(msgType, ext1, ext2); |
| } |
| } |
| |
| void CameraService::Client::handleGenericData(int32_t msgType, |
| const sp<IMemory>& dataPtr) { |
| sp<ICameraClient> c = mCameraClient; |
| mLock.unlock(); |
| if (c != 0) { |
| c->dataCallback(msgType, dataPtr); |
| } |
| } |
| |
| void CameraService::Client::handleGenericDataTimestamp(nsecs_t timestamp, |
| int32_t msgType, const sp<IMemory>& dataPtr) { |
| sp<ICameraClient> c = mCameraClient; |
| mLock.unlock(); |
| if (c != 0) { |
| c->dataCallbackTimestamp(timestamp, msgType, dataPtr); |
| } |
| } |
| |
| void CameraService::Client::copyFrameAndPostCopiedFrame( |
| const sp<ICameraClient>& client, const sp<IMemoryHeap>& heap, |
| size_t offset, size_t size) { |
| LOG2("copyFrameAndPostCopiedFrame"); |
| // It is necessary to copy out of pmem before sending this to |
| // the callback. For efficiency, reuse the same MemoryHeapBase |
| // provided it's big enough. Don't allocate the memory or |
| // perform the copy if there's no callback. |
| // hold the preview lock while we grab a reference to the preview buffer |
| sp<MemoryHeapBase> previewBuffer; |
| |
| if (mPreviewBuffer == 0) { |
| mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); |
| } else if (size > mPreviewBuffer->virtualSize()) { |
| mPreviewBuffer.clear(); |
| mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); |
| } |
| if (mPreviewBuffer == 0) { |
| LOGE("failed to allocate space for preview buffer"); |
| mLock.unlock(); |
| return; |
| } |
| previewBuffer = mPreviewBuffer; |
| |
| memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); |
| |
| sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); |
| if (frame == 0) { |
| LOGE("failed to allocate space for frame callback"); |
| mLock.unlock(); |
| return; |
| } |
| |
| mLock.unlock(); |
| client->dataCallback(CAMERA_MSG_PREVIEW_FRAME, frame); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| static const int kDumpLockRetries = 50; |
| static const int kDumpLockSleep = 60000; |
| |
| static bool tryLock(Mutex& mutex) |
| { |
| bool locked = false; |
| for (int i = 0; i < kDumpLockRetries; ++i) { |
| if (mutex.tryLock() == NO_ERROR) { |
| locked = true; |
| break; |
| } |
| usleep(kDumpLockSleep); |
| } |
| return locked; |
| } |
| |
| status_t CameraService::dump(int fd, const Vector<String16>& args) { |
| static const char* kDeadlockedString = "CameraService may be deadlocked\n"; |
| |
| const size_t SIZE = 256; |
| char buffer[SIZE]; |
| String8 result; |
| if (checkCallingPermission(String16("android.permission.DUMP")) == false) { |
| snprintf(buffer, SIZE, "Permission Denial: " |
| "can't dump CameraService from pid=%d, uid=%d\n", |
| getCallingPid(), |
| getCallingUid()); |
| result.append(buffer); |
| write(fd, result.string(), result.size()); |
| } else { |
| bool locked = tryLock(mServiceLock); |
| // failed to lock - CameraService is probably deadlocked |
| if (!locked) { |
| String8 result(kDeadlockedString); |
| write(fd, result.string(), result.size()); |
| } |
| |
| bool hasClient = false; |
| for (int i = 0; i < mNumberOfCameras; i++) { |
| sp<Client> client = mClient[i].promote(); |
| if (client == 0) continue; |
| hasClient = true; |
| sprintf(buffer, "Client[%d] (%p) PID: %d\n", |
| i, |
| client->getCameraClient()->asBinder().get(), |
| client->mClientPid); |
| result.append(buffer); |
| write(fd, result.string(), result.size()); |
| client->mHardware->dump(fd, args); |
| } |
| if (!hasClient) { |
| result.append("No camera client yet.\n"); |
| write(fd, result.string(), result.size()); |
| } |
| |
| if (locked) mServiceLock.unlock(); |
| |
| // change logging level |
| int n = args.size(); |
| for (int i = 0; i + 1 < n; i++) { |
| if (args[i] == String16("-v")) { |
| String8 levelStr(args[i+1]); |
| int level = atoi(levelStr.string()); |
| sprintf(buffer, "Set Log Level to %d", level); |
| result.append(buffer); |
| setLogLevel(level); |
| } |
| } |
| } |
| return NO_ERROR; |
| } |
| |
| }; // namespace android |