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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"
//#define LOG_NDEBUG 0
#include <stdio.h>
#include <sys/types.h>
#include <pthread.h>
#include <binder/AppOpsManager.h>
#include <binder/IPCThreadState.h>
#include <binder/IServiceManager.h>
#include <binder/MemoryBase.h>
#include <binder/MemoryHeapBase.h>
#include <cutils/atomic.h>
#include <cutils/properties.h>
#include <gui/Surface.h>
#include <hardware/hardware.h>
#include <media/AudioSystem.h>
#include <media/mediaplayer.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <utils/String16.h>
#include "CameraService.h"
#include "api1/CameraClient.h"
#include "api1/Camera2Client.h"
#include "api_pro/ProCamera2Client.h"
#include "api2/CameraDeviceClient.h"
#include "CameraDeviceFactory.h"
namespace android {
// ----------------------------------------------------------------------------
// Logging support -- this is for debugging only
// Use "adb shell dumpsys media.camera -v 1" to change it.
volatile int32_t gLogLevel = 0;
#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__);
#define LOG2(...) ALOGD_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();
}
extern "C" {
static void camera_device_status_change(
const struct camera_module_callbacks* callbacks,
int camera_id,
int new_status) {
sp<CameraService> cs = const_cast<CameraService*>(
static_cast<const CameraService*>(callbacks));
cs->onDeviceStatusChanged(
camera_id,
new_status);
}
} // extern "C"
// ----------------------------------------------------------------------------
// 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), mModule(0)
{
ALOGI("CameraService started (pid=%d)", getpid());
gCameraService = this;
for (size_t i = 0; i < MAX_CAMERAS; ++i) {
mStatusList[i] = ICameraServiceListener::STATUS_PRESENT;
}
this->camera_device_status_change = android::camera_device_status_change;
}
void CameraService::onFirstRef()
{
LOG1("CameraService::onFirstRef");
BnCameraService::onFirstRef();
if (hw_get_module(CAMERA_HARDWARE_MODULE_ID,
(const hw_module_t **)&mModule) < 0) {
ALOGE("Could not load camera HAL module");
mNumberOfCameras = 0;
}
else {
ALOGI("Loaded \"%s\" camera module", mModule->common.name);
mNumberOfCameras = mModule->get_number_of_cameras();
if (mNumberOfCameras > MAX_CAMERAS) {
ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).",
mNumberOfCameras, MAX_CAMERAS);
mNumberOfCameras = MAX_CAMERAS;
}
for (int i = 0; i < mNumberOfCameras; i++) {
setCameraFree(i);
}
if (mModule->common.module_api_version >=
CAMERA_MODULE_API_VERSION_2_1) {
mModule->set_callbacks(this);
}
CameraDeviceFactory::registerService(this);
}
}
CameraService::~CameraService() {
for (int i = 0; i < mNumberOfCameras; i++) {
if (mBusy[i]) {
ALOGE("camera %d is still in use in destructor!", i);
}
}
gCameraService = NULL;
}
void CameraService::onDeviceStatusChanged(int cameraId,
int newStatus)
{
ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__,
cameraId, newStatus);
if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId);
return;
}
if ((int)getStatus(cameraId) == newStatus) {
ALOGE("%s: State transition to the same status 0x%x not allowed",
__FUNCTION__, (uint32_t)newStatus);
return;
}
/* don't do this in updateStatus
since it is also called from connect and we could get into a deadlock */
if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) {
Vector<sp<BasicClient> > clientsToDisconnect;
{
Mutex::Autolock al(mServiceLock);
/* Find all clients that we need to disconnect */
sp<BasicClient> client = mClient[cameraId].promote();
if (client.get() != NULL) {
clientsToDisconnect.push_back(client);
}
int i = cameraId;
for (size_t j = 0; j < mProClientList[i].size(); ++j) {
sp<ProClient> cl = mProClientList[i][j].promote();
if (cl != NULL) {
clientsToDisconnect.push_back(cl);
}
}
}
/* now disconnect them. don't hold the lock
or we can get into a deadlock */
for (size_t i = 0; i < clientsToDisconnect.size(); ++i) {
sp<BasicClient> client = clientsToDisconnect[i];
client->disconnect();
/**
* The remote app will no longer be able to call methods on the
* client since the client PID will be reset to 0
*/
}
ALOGV("%s: After unplug, disconnected %d clients",
__FUNCTION__, clientsToDisconnect.size());
}
updateStatus(
static_cast<ICameraServiceListener::Status>(newStatus), cameraId);
}
int32_t CameraService::getNumberOfCameras() {
return mNumberOfCameras;
}
status_t CameraService::getCameraInfo(int cameraId,
struct CameraInfo* cameraInfo) {
if (!mModule) {
return -ENODEV;
}
if (cameraId < 0 || cameraId >= mNumberOfCameras) {
return BAD_VALUE;
}
struct camera_info info;
status_t rc = mModule->get_camera_info(cameraId, &info);
cameraInfo->facing = info.facing;
cameraInfo->orientation = info.orientation;
return rc;
}
status_t CameraService::getCameraCharacteristics(int cameraId,
CameraMetadata* cameraInfo) {
if (!cameraInfo) {
ALOGE("%s: cameraInfo is NULL", __FUNCTION__);
return BAD_VALUE;
}
if (!mModule) {
ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__);
return -ENODEV;
}
if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_0) {
// TODO: Remove this check once HAL1 shim is in place.
ALOGE("%s: Only HAL module version V2 or higher supports static metadata", __FUNCTION__);
return BAD_VALUE;
}
if (cameraId < 0 || cameraId >= mNumberOfCameras) {
ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId);
return BAD_VALUE;
}
int facing;
if (getDeviceVersion(cameraId, &facing) == CAMERA_DEVICE_API_VERSION_1_0) {
// TODO: Remove this check once HAL1 shim is in place.
ALOGE("%s: HAL1 doesn't support static metadata yet", __FUNCTION__);
return BAD_VALUE;
}
struct camera_info info;
status_t ret = mModule->get_camera_info(cameraId, &info);
*cameraInfo = info.static_camera_characteristics;
return ret;
}
int CameraService::getDeviceVersion(int cameraId, int* facing) {
struct camera_info info;
if (mModule->get_camera_info(cameraId, &info) != OK) {
return -1;
}
int deviceVersion;
if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_0) {
deviceVersion = info.device_version;
} else {
deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
}
if (facing) {
*facing = info.facing;
}
return deviceVersion;
}
bool CameraService::isValidCameraId(int cameraId) {
int facing;
int deviceVersion = getDeviceVersion(cameraId, &facing);
switch(deviceVersion) {
case CAMERA_DEVICE_API_VERSION_1_0:
case CAMERA_DEVICE_API_VERSION_2_0:
case CAMERA_DEVICE_API_VERSION_2_1:
case CAMERA_DEVICE_API_VERSION_3_0:
return true;
default:
return false;
}
return false;
}
status_t CameraService::validateConnect(int cameraId,
/*inout*/
int& clientUid) const {
int callingPid = getCallingPid();
if (clientUid == USE_CALLING_UID) {
clientUid = getCallingUid();
} else {
// We only trust our own process to forward client UIDs
if (callingPid != getpid()) {
ALOGE("CameraService::connect X (pid %d) rejected (don't trust clientUid)",
callingPid);
return PERMISSION_DENIED;
}
}
if (!mModule) {
ALOGE("Camera HAL module not loaded");
return -ENODEV;
}
if (cameraId < 0 || cameraId >= mNumberOfCameras) {
ALOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).",
callingPid, cameraId);
return -ENODEV;
}
char value[PROPERTY_VALUE_MAX];
property_get("sys.secpolicy.camera.disabled", value, "0");
if (strcmp(value, "1") == 0) {
// Camera is disabled by DevicePolicyManager.
ALOGI("Camera is disabled. connect X (pid %d) rejected", callingPid);
return -EACCES;
}
ICameraServiceListener::Status currentStatus = getStatus(cameraId);
if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) {
ALOGI("Camera is not plugged in,"
" connect X (pid %d) rejected", callingPid);
return -ENODEV;
} else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) {
ALOGI("Camera is enumerating,"
" connect X (pid %d) rejected", callingPid);
return -EBUSY;
}
// Else don't check for STATUS_NOT_AVAILABLE.
// -- It's done implicitly in canConnectUnsafe /w the mBusy array
return OK;
}
bool CameraService::canConnectUnsafe(int cameraId,
const String16& clientPackageName,
const sp<IBinder>& remoteCallback,
sp<BasicClient> &client) {
String8 clientName8(clientPackageName);
int callingPid = getCallingPid();
if (mClient[cameraId] != 0) {
client = mClient[cameraId].promote();
if (client != 0) {
if (remoteCallback == client->getRemote()) {
LOG1("CameraService::connect X (pid %d) (the same client)",
callingPid);
return true;
} else {
// TODOSC: need to support 1 regular client,
// multiple shared clients here
ALOGW("CameraService::connect X (pid %d) rejected"
" (existing client).", callingPid);
return false;
}
}
mClient[cameraId].clear();
}
/*
mBusy is set to false as the last step of the Client destructor,
after which it is guaranteed that the Client destructor has finished (
including any inherited destructors)
We only need this for a Client subclasses since we don't allow
multiple Clents to be opened concurrently, but multiple BasicClient
would be fine
*/
if (mBusy[cameraId]) {
ALOGW("CameraService::connect X (pid %d, \"%s\") rejected"
" (camera %d is still busy).", callingPid,
clientName8.string(), cameraId);
return false;
}
return true;
}
status_t CameraService::connect(
const sp<ICameraClient>& cameraClient,
int cameraId,
const String16& clientPackageName,
int clientUid,
/*out*/
sp<ICamera>& device) {
String8 clientName8(clientPackageName);
int callingPid = getCallingPid();
LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid,
clientName8.string(), cameraId);
status_t status = validateConnect(cameraId, /*inout*/clientUid);
if (status != OK) {
return status;
}
sp<Client> client;
{
Mutex::Autolock lock(mServiceLock);
sp<BasicClient> clientTmp;
if (!canConnectUnsafe(cameraId, clientPackageName,
cameraClient->asBinder(),
/*out*/clientTmp)) {
return -EBUSY;
} else if (client.get() != NULL) {
device = static_cast<Client*>(clientTmp.get());
return OK;
}
int facing = -1;
int deviceVersion = getDeviceVersion(cameraId, &facing);
// If there are other non-exclusive users of the camera,
// this will tear them down before we can reuse the camera
if (isValidCameraId(cameraId)) {
// transition from PRESENT -> NOT_AVAILABLE
updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
cameraId);
}
switch(deviceVersion) {
case CAMERA_DEVICE_API_VERSION_1_0:
client = new CameraClient(this, cameraClient,
clientPackageName, cameraId,
facing, callingPid, clientUid, getpid());
break;
case CAMERA_DEVICE_API_VERSION_2_0:
case CAMERA_DEVICE_API_VERSION_2_1:
case CAMERA_DEVICE_API_VERSION_3_0:
client = new Camera2Client(this, cameraClient,
clientPackageName, cameraId,
facing, callingPid, clientUid, getpid(),
deviceVersion);
break;
case -1:
ALOGE("Invalid camera id %d", cameraId);
return BAD_VALUE;
default:
ALOGE("Unknown camera device HAL version: %d", deviceVersion);
return INVALID_OPERATION;
}
status_t status = connectFinishUnsafe(client, client->getRemote());
if (status != OK) {
// this is probably not recoverable.. maybe the client can try again
// OK: we can only get here if we were originally in PRESENT state
updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
return status;
}
mClient[cameraId] = client;
LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId,
getpid());
}
// important: release the mutex here so the client can call back
// into the service from its destructor (can be at the end of the call)
device = client;
return OK;
}
status_t CameraService::connectFinishUnsafe(const sp<BasicClient>& client,
const sp<IBinder>& remoteCallback) {
status_t status = client->initialize(mModule);
if (status != OK) {
return status;
}
remoteCallback->linkToDeath(this);
return OK;
}
status_t CameraService::connectPro(
const sp<IProCameraCallbacks>& cameraCb,
int cameraId,
const String16& clientPackageName,
int clientUid,
/*out*/
sp<IProCameraUser>& device)
{
String8 clientName8(clientPackageName);
int callingPid = getCallingPid();
LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid,
clientName8.string(), cameraId);
status_t status = validateConnect(cameraId, /*inout*/clientUid);
if (status != OK) {
return status;
}
sp<ProClient> client;
{
Mutex::Autolock lock(mServiceLock);
{
sp<BasicClient> client;
if (!canConnectUnsafe(cameraId, clientPackageName,
cameraCb->asBinder(),
/*out*/client)) {
return -EBUSY;
}
}
int facing = -1;
int deviceVersion = getDeviceVersion(cameraId, &facing);
switch(deviceVersion) {
case CAMERA_DEVICE_API_VERSION_1_0:
ALOGE("Camera id %d uses HALv1, doesn't support ProCamera",
cameraId);
return -EOPNOTSUPP;
break;
case CAMERA_DEVICE_API_VERSION_2_0:
case CAMERA_DEVICE_API_VERSION_2_1:
case CAMERA_DEVICE_API_VERSION_3_0:
client = new ProCamera2Client(this, cameraCb, String16(),
cameraId, facing, callingPid, USE_CALLING_UID, getpid());
break;
case -1:
ALOGE("Invalid camera id %d", cameraId);
return BAD_VALUE;
default:
ALOGE("Unknown camera device HAL version: %d", deviceVersion);
return INVALID_OPERATION;
}
status_t status = connectFinishUnsafe(client, client->getRemote());
if (status != OK) {
return status;
}
mProClientList[cameraId].push(client);
LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId,
getpid());
}
// important: release the mutex here so the client can call back
// into the service from its destructor (can be at the end of the call)
device = client;
return OK;
}
status_t CameraService::connectDevice(
const sp<ICameraDeviceCallbacks>& cameraCb,
int cameraId,
const String16& clientPackageName,
int clientUid,
/*out*/
sp<ICameraDeviceUser>& device)
{
String8 clientName8(clientPackageName);
int callingPid = getCallingPid();
LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid,
clientName8.string(), cameraId);
status_t status = validateConnect(cameraId, /*inout*/clientUid);
if (status != OK) {
return status;
}
sp<CameraDeviceClient> client;
{
Mutex::Autolock lock(mServiceLock);
{
sp<BasicClient> client;
if (!canConnectUnsafe(cameraId, clientPackageName,
cameraCb->asBinder(),
/*out*/client)) {
return -EBUSY;
}
}
int facing = -1;
int deviceVersion = getDeviceVersion(cameraId, &facing);
// If there are other non-exclusive users of the camera,
// this will tear them down before we can reuse the camera
if (isValidCameraId(cameraId)) {
// transition from PRESENT -> NOT_AVAILABLE
updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE,
cameraId);
}
switch(deviceVersion) {
case CAMERA_DEVICE_API_VERSION_1_0:
ALOGW("Camera using old HAL version: %d", deviceVersion);
return -EOPNOTSUPP;
// TODO: don't allow 2.0 Only allow 2.1 and higher
case CAMERA_DEVICE_API_VERSION_2_0:
case CAMERA_DEVICE_API_VERSION_2_1:
case CAMERA_DEVICE_API_VERSION_3_0:
client = new CameraDeviceClient(this, cameraCb, String16(),
cameraId, facing, callingPid, USE_CALLING_UID, getpid());
break;
case -1:
ALOGE("Invalid camera id %d", cameraId);
return BAD_VALUE;
default:
ALOGE("Unknown camera device HAL version: %d", deviceVersion);
return INVALID_OPERATION;
}
status_t status = connectFinishUnsafe(client, client->getRemote());
if (status != OK) {
// this is probably not recoverable.. maybe the client can try again
// OK: we can only get here if we were originally in PRESENT state
updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId);
return status;
}
LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId,
getpid());
mClient[cameraId] = client;
}
// important: release the mutex here so the client can call back
// into the service from its destructor (can be at the end of the call)
device = client;
return OK;
}
status_t CameraService::addListener(
const sp<ICameraServiceListener>& listener) {
ALOGV("%s: Add listener %p", __FUNCTION__, listener.get());
Mutex::Autolock lock(mServiceLock);
Vector<sp<ICameraServiceListener> >::iterator it, end;
for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
if ((*it)->asBinder() == listener->asBinder()) {
ALOGW("%s: Tried to add listener %p which was already subscribed",
__FUNCTION__, listener.get());
return ALREADY_EXISTS;
}
}
mListenerList.push_back(listener);
/* Immediately signal current status to this listener only */
{
Mutex::Autolock m(mStatusMutex) ;
int numCams = getNumberOfCameras();
for (int i = 0; i < numCams; ++i) {
listener->onStatusChanged(mStatusList[i], i);
}
}
return OK;
}
status_t CameraService::removeListener(
const sp<ICameraServiceListener>& listener) {
ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get());
Mutex::Autolock lock(mServiceLock);
Vector<sp<ICameraServiceListener> >::iterator it;
for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
if ((*it)->asBinder() == listener->asBinder()) {
mListenerList.erase(it);
return OK;
}
}
ALOGW("%s: Tried to remove a listener %p which was not subscribed",
__FUNCTION__, listener.get());
return BAD_VALUE;
}
void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) {
int callingPid = getCallingPid();
LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid);
// Declare this before the lock to make absolutely sure the
// destructor won't be called with the lock held.
Mutex::Autolock lock(mServiceLock);
int outIndex;
sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex);
if (client != 0) {
// Found our camera, clear and leave.
LOG1("removeClient: clear camera %d", outIndex);
mClient[outIndex].clear();
client->getRemote()->unlinkToDeath(this);
} else {
sp<ProClient> clientPro = findProClientUnsafe(remoteBinder);
if (clientPro != NULL) {
// Found our camera, clear and leave.
LOG1("removeClient: clear pro %p", clientPro.get());
clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this);
}
}
LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid);
}
sp<CameraService::ProClient> CameraService::findProClientUnsafe(
const wp<IBinder>& cameraCallbacksRemote)
{
sp<ProClient> clientPro;
for (int i = 0; i < mNumberOfCameras; ++i) {
Vector<size_t> removeIdx;
for (size_t j = 0; j < mProClientList[i].size(); ++j) {
wp<ProClient> cl = mProClientList[i][j];
sp<ProClient> clStrong = cl.promote();
if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) {
clientPro = clStrong;
break;
} else if (clStrong == NULL) {
// mark to clean up dead ptr
removeIdx.push(j);
}
}
// remove stale ptrs (in reverse so the indices dont change)
for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) {
mProClientList[i].removeAt(removeIdx[j]);
}
}
return clientPro;
}
sp<CameraService::BasicClient> CameraService::findClientUnsafe(
const wp<IBinder>& cameraClient, int& outIndex) {
sp<BasicClient> client;
for (int i = 0; i < mNumberOfCameras; i++) {
// 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() -> removeClientByRemote().
client = mClient[i].promote();
// Clean up stale client entry
if (client == NULL) {
mClient[i].clear();
continue;
}
if (cameraClient == client->getRemote()) {
// Found our camera
outIndex = i;
return client;
}
}
outIndex = -1;
return NULL;
}
CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) {
if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
return mClient[cameraId].unsafe_get();
}
Mutex* CameraService::getClientLockById(int cameraId) {
if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL;
return &mClientLock[cameraId];
}
sp<CameraService::BasicClient> CameraService::getClientByRemote(
const wp<IBinder>& cameraClient) {
// Declare this before the lock to make absolutely sure the
// destructor won't be called with the lock held.
sp<BasicClient> client;
Mutex::Autolock lock(mServiceLock);
int outIndex;
client = findClientUnsafe(cameraClient, outIndex);
return client;
}
status_t CameraService::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
// Permission checks
switch (code) {
case BnCameraService::CONNECT:
case BnCameraService::CONNECT_PRO:
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();
ALOGE("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]);
ALOGV("setCameraBusy cameraId=%d", cameraId);
}
void CameraService::setCameraFree(int cameraId) {
android_atomic_write(0, &mBusy[cameraId]);
ALOGV("setCameraFree cameraId=%d", 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.
MediaPlayer* CameraService::newMediaPlayer(const char *file) {
MediaPlayer* mp = new MediaPlayer();
if (mp->setDataSource(file, NULL) == NO_ERROR) {
mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
mp->prepare();
} else {
ALOGE("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) {
player->seekTo(0);
player->start();
}
}
// ----------------------------------------------------------------------------
CameraService::Client::Client(const sp<CameraService>& cameraService,
const sp<ICameraClient>& cameraClient,
const String16& clientPackageName,
int cameraId, int cameraFacing,
int clientPid, uid_t clientUid,
int servicePid) :
CameraService::BasicClient(cameraService, cameraClient->asBinder(),
clientPackageName,
cameraId, cameraFacing,
clientPid, clientUid,
servicePid)
{
int callingPid = getCallingPid();
LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId);
mRemoteCallback = cameraClient;
cameraService->setCameraBusy(cameraId);
cameraService->loadSound();
LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId);
}
// tear down the client
CameraService::Client::~Client() {
ALOGV("~Client");
mDestructionStarted = true;
mCameraService->releaseSound();
// unconditionally disconnect. function is idempotent
Client::disconnect();
}
CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
const sp<IBinder>& remoteCallback,
const String16& clientPackageName,
int cameraId, int cameraFacing,
int clientPid, uid_t clientUid,
int servicePid):
mClientPackageName(clientPackageName)
{
mCameraService = cameraService;
mRemoteBinder = remoteCallback;
mCameraId = cameraId;
mCameraFacing = cameraFacing;
mClientPid = clientPid;
mClientUid = clientUid;
mServicePid = servicePid;
mOpsActive = false;
mDestructionStarted = false;
}
CameraService::BasicClient::~BasicClient() {
ALOGV("~BasicClient");
mDestructionStarted = true;
}
void CameraService::BasicClient::disconnect() {
ALOGV("BasicClient::disconnect");
mCameraService->removeClientByRemote(mRemoteBinder);
// client shouldn't be able to call into us anymore
mClientPid = 0;
}
status_t CameraService::BasicClient::startCameraOps() {
int32_t res;
mOpsCallback = new OpsCallback(this);
{
ALOGV("%s: Start camera ops, package name = %s, client UID = %d",
__FUNCTION__, String8(mClientPackageName).string(), mClientUid);
}
mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA,
mClientPackageName, mOpsCallback);
res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA,
mClientUid, mClientPackageName);
if (res != AppOpsManager::MODE_ALLOWED) {
ALOGI("Camera %d: Access for \"%s\" has been revoked",
mCameraId, String8(mClientPackageName).string());
return PERMISSION_DENIED;
}
mOpsActive = true;
return OK;
}
status_t CameraService::BasicClient::finishCameraOps() {
if (mOpsActive) {
mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid,
mClientPackageName);
mOpsActive = false;
}
mAppOpsManager.stopWatchingMode(mOpsCallback);
mOpsCallback.clear();
return OK;
}
void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) {
String8 name(packageName);
String8 myName(mClientPackageName);
if (op != AppOpsManager::OP_CAMERA) {
ALOGW("Unexpected app ops notification received: %d", op);
return;
}
int32_t res;
res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA,
mClientUid, mClientPackageName);
ALOGV("checkOp returns: %d, %s ", res,
res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" :
res == AppOpsManager::MODE_IGNORED ? "IGNORED" :
res == AppOpsManager::MODE_ERRORED ? "ERRORED" :
"UNKNOWN");
if (res != AppOpsManager::MODE_ALLOWED) {
ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId,
myName.string());
// Reset the client PID to allow server-initiated disconnect,
// and to prevent further calls by client.
mClientPid = getCallingPid();
notifyError();
disconnect();
}
}
// ----------------------------------------------------------------------------
Mutex* CameraService::Client::getClientLockFromCookie(void* user) {
return gCameraService->getClientLockById((int) user);
}
// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should
// be acquired for this to be safe
CameraService::Client* CameraService::Client::getClientFromCookie(void* user) {
BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int) user);
// OK: only CameraClient calls this, and they already cast anyway.
Client* client = static_cast<Client*>(basicClient);
// 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 == NULL) return NULL;
// destruction already started, so should not be accessed
if (client->mDestructionStarted) return NULL;
return client;
}
void CameraService::Client::notifyError() {
mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
}
// NOTE: function is idempotent
void CameraService::Client::disconnect() {
ALOGV("Client::disconnect");
BasicClient::disconnect();
mCameraService->setCameraFree(mCameraId);
StatusVector rejectSourceStates;
rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT);
rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING);
// Transition to PRESENT if the camera is not in either of above 2 states
mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT,
mCameraId,
&rejectSourceStates);
}
CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client):
mClient(client) {
}
void CameraService::Client::OpsCallback::opChanged(int32_t op,
const String16& packageName) {
sp<BasicClient> client = mClient.promote();
if (client != NULL) {
client->opChanged(op, packageName);
}
}
// ----------------------------------------------------------------------------
// IProCamera
// ----------------------------------------------------------------------------
CameraService::ProClient::ProClient(const sp<CameraService>& cameraService,
const sp<IProCameraCallbacks>& remoteCallback,
const String16& clientPackageName,
int cameraId,
int cameraFacing,
int clientPid,
uid_t clientUid,
int servicePid)
: CameraService::BasicClient(cameraService, remoteCallback->asBinder(),
clientPackageName, cameraId, cameraFacing,
clientPid, clientUid, servicePid)
{
mRemoteCallback = remoteCallback;
}
CameraService::ProClient::~ProClient() {
}
void CameraService::ProClient::notifyError() {
mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
}
// ----------------------------------------------------------------------------
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) {
String8 result;
if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
result.appendFormat("Permission Denial: "
"can't dump CameraService from pid=%d, uid=%d\n",
getCallingPid(),
getCallingUid());
write(fd, result.string(), result.size());
} else {
bool locked = tryLock(mServiceLock);
// failed to lock - CameraService is probably deadlocked
if (!locked) {
result.append("CameraService may be deadlocked\n");
write(fd, result.string(), result.size());
}
bool hasClient = false;
if (!mModule) {
result = String8::format("No camera module available!\n");
write(fd, result.string(), result.size());
return NO_ERROR;
}
result = String8::format("Camera module HAL API version: 0x%x\n",
mModule->common.hal_api_version);
result.appendFormat("Camera module API version: 0x%x\n",
mModule->common.module_api_version);
result.appendFormat("Camera module name: %s\n",
mModule->common.name);
result.appendFormat("Camera module author: %s\n",
mModule->common.author);
result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras);
write(fd, result.string(), result.size());
for (int i = 0; i < mNumberOfCameras; i++) {
result = String8::format("Camera %d static information:\n", i);
camera_info info;
status_t rc = mModule->get_camera_info(i, &info);
if (rc != OK) {
result.appendFormat(" Error reading static information!\n");
write(fd, result.string(), result.size());
} else {
result.appendFormat(" Facing: %s\n",
info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT");
result.appendFormat(" Orientation: %d\n", info.orientation);
int deviceVersion;
if (mModule->common.module_api_version <
CAMERA_MODULE_API_VERSION_2_0) {
deviceVersion = CAMERA_DEVICE_API_VERSION_1_0;
} else {
deviceVersion = info.device_version;
}
result.appendFormat(" Device version: 0x%x\n", deviceVersion);
if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) {
result.appendFormat(" Device static metadata:\n");
write(fd, result.string(), result.size());
dump_indented_camera_metadata(info.static_camera_characteristics,
fd, 2, 4);
} else {
write(fd, result.string(), result.size());
}
}
sp<BasicClient> client = mClient[i].promote();
if (client == 0) {
result = String8::format(" Device is closed, no client instance\n");
write(fd, result.string(), result.size());
continue;
}
hasClient = true;
result = String8::format(" Device is open. Client instance dump:\n");
write(fd, result.string(), result.size());
client->dump(fd, args);
}
if (!hasClient) {
result = String8::format("\nNo active camera clients 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++) {
String16 verboseOption("-v");
if (args[i] == verboseOption) {
String8 levelStr(args[i+1]);
int level = atoi(levelStr.string());
result = String8::format("\nSetting log level to %d.\n", level);
setLogLevel(level);
write(fd, result.string(), result.size());
}
}
}
return NO_ERROR;
}
/*virtual*/void CameraService::binderDied(
const wp<IBinder> &who) {
/**
* While tempting to promote the wp<IBinder> into a sp,
* it's actually not supported by the binder driver
*/
ALOGV("java clients' binder died");
sp<BasicClient> cameraClient = getClientByRemote(who);
if (cameraClient == 0) {
ALOGV("java clients' binder death already cleaned up (normal case)");
return;
}
ALOGW("Disconnecting camera client %p since the binder for it "
"died (this pid %d)", cameraClient.get(), getCallingPid());
cameraClient->disconnect();
}
void CameraService::updateStatus(ICameraServiceListener::Status status,
int32_t cameraId,
const StatusVector *rejectSourceStates) {
// do not lock mServiceLock here or can get into a deadlock from
// connect() -> ProClient::disconnect -> updateStatus
Mutex::Autolock lock(mStatusMutex);
ICameraServiceListener::Status oldStatus = mStatusList[cameraId];
mStatusList[cameraId] = status;
if (oldStatus != status) {
ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x",
__FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status);
if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT &&
(status != ICameraServiceListener::STATUS_PRESENT &&
status != ICameraServiceListener::STATUS_ENUMERATING)) {
ALOGW("%s: From NOT_PRESENT can only transition into PRESENT"
" or ENUMERATING", __FUNCTION__);
mStatusList[cameraId] = oldStatus;
return;
}
if (rejectSourceStates != NULL) {
const StatusVector &rejectList = *rejectSourceStates;
StatusVector::const_iterator it = rejectList.begin();
/**
* Sometimes we want to conditionally do a transition.
* For example if a client disconnects, we want to go to PRESENT
* only if we weren't already in NOT_PRESENT or ENUMERATING.
*/
for (; it != rejectList.end(); ++it) {
if (oldStatus == *it) {
ALOGV("%s: Rejecting status transition for Camera ID %d, "
" since the source state was was in one of the bad "
" states.", __FUNCTION__, cameraId);
mStatusList[cameraId] = oldStatus;
return;
}
}
}
/**
* ProClients lose their exclusive lock.
* - Done before the CameraClient can initialize the HAL device,
* since we want to be able to close it before they get to initialize
*/
if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) {
Vector<wp<ProClient> > proClients(mProClientList[cameraId]);
Vector<wp<ProClient> >::const_iterator it;
for (it = proClients.begin(); it != proClients.end(); ++it) {
sp<ProClient> proCl = it->promote();
if (proCl.get() != NULL) {
proCl->onExclusiveLockStolen();
}
}
}
Vector<sp<ICameraServiceListener> >::const_iterator it;
for (it = mListenerList.begin(); it != mListenerList.end(); ++it) {
(*it)->onStatusChanged(status, cameraId);
}
}
}
ICameraServiceListener::Status CameraService::getStatus(int cameraId) const {
if (cameraId < 0 || cameraId >= MAX_CAMERAS) {
ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId);
return ICameraServiceListener::STATUS_UNKNOWN;
}
Mutex::Autolock al(mStatusMutex);
return mStatusList[cameraId];
}
}; // namespace android
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