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-rw-r--r--services/camera/libcameraservice/CameraService.cpp1295
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diff --git a/services/camera/libcameraservice/CameraService.cpp b/services/camera/libcameraservice/CameraService.cpp
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+++ b/services/camera/libcameraservice/CameraService.cpp
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+/*
+**
+** 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;
+ }
+ CameraInfo info;
+ HAL_getCameraInfo(cameraId, &info);
+ client = new Client(this, cameraClient, hardware, cameraId, info.facing,
+ 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 cameraFacing, int clientPid) {
+ int callingPid = getCallingPid();
+ LOG1("Client::Client E (pid %d)", callingPid);
+
+ mCameraService = cameraService;
+ mCameraClient = cameraClient;
+ mHardware = hardware;
+ mCameraId = cameraId;
+ mCameraFacing = cameraFacing;
+ 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 = getOrientation(0, mCameraFacing == CAMERA_FACING_FRONT);
+ mOrientationChanged = false;
+ 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);
+ mOverlayRef = 0;
+ } 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 || mOrientationChanged) {
+ // Force the destruction of any previous overlay
+ sp<Overlay> dummy;
+ mHardware->setOverlay(dummy);
+ mOverlayRef = 0;
+ mOrientationChanged = false;
+ }
+
+ 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());
+ int orientation;
+ 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;
+ }
+ // Mirror the preview if the camera is front-facing.
+ orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT);
+ if (orientation == -1) return BAD_VALUE;
+
+ if (mOrientation != orientation) {
+ mOrientation = orientation;
+ if (mOverlayRef != 0) mOrientationChanged = true;
+ }
+ 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);
+}
+
+int CameraService::Client::getOrientation(int degrees, bool mirror) {
+ if (!mirror) {
+ if (degrees == 0) return 0;
+ else if (degrees == 90) return HAL_TRANSFORM_ROT_90;
+ else if (degrees == 180) return HAL_TRANSFORM_ROT_180;
+ else if (degrees == 270) return HAL_TRANSFORM_ROT_270;
+ } else { // Do mirror (horizontal flip)
+ if (degrees == 0) { // FLIP_H and ROT_0
+ return HAL_TRANSFORM_FLIP_H;
+ } else if (degrees == 90) { // FLIP_H and ROT_90
+ return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90;
+ } else if (degrees == 180) { // FLIP_H and ROT_180
+ return HAL_TRANSFORM_FLIP_V;
+ } else if (degrees == 270) { // FLIP_H and ROT_270
+ return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90;
+ }
+ }
+ LOGE("Invalid setDisplayOrientation degrees=%d", degrees);
+ return -1;
+}
+
+
+// ----------------------------------------------------------------------------
+
+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