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未验证 提交 9ed0e30d 编写于 作者: Z Zhangzi 提交者： Gitee
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update zh-cn/device-dev/driver/driver-peripherals-camera-des.md. 

camera模块开发指南优化
Signed-off-by: NZhangzi <zhangjiaxiang7@huawei.com>
上级 7d0d602e
隐藏空白更改
内联 并排
Showing with 499 addition and 209 deletion
zh-cn/device-dev/driver/driver-peripherals-camera-des.md
浏览文件 @ 9ed0e30d
......@@ -121,7 +121,7 @@ Camera驱动的开发过程主要包含以下步骤：
1. 注册CameraHost
定义Camera的HdfDriverEntry结构体，该结构体中定义了CameraHost初始化的方法。
定义Camera的HdfDriverEntry结构体，该结构体中定义了CameraHost初始化的方法（代码目录drivers/peripheral/camera/interfaces/hdi_ipc/camera_host_driver.cpp）。
```
struct HdfDriverEntry g_cameraHostDriverEntry = {
.moduleVersion = 1,
......@@ -138,23 +138,36 @@ Camera驱动的开发过程主要包含以下步骤：
步骤1中提到的HdfCameraHostDriverBind接口提供了CameraServiceDispatch和CameraHostStubInstance的注册。这两个接口一个是远端调用CameraHost的方法，如OpenCamera()，SetFlashlight()等，另外一个是Camera设备的初始化，在开机时被调用。
```
int HdfCameraHostDriverBind(HdfDeviceObject *deviceObject)
static int HdfCameraHostDriverBind(struct HdfDeviceObject *deviceObject)
{
HDF_LOGI("HdfCameraHostDriverBind enter!");
if (deviceObject == nullptr) {
HDF_LOGE("HdfCameraHostDriverBind: HdfDeviceObject is NULL!");
HDF_LOGI("HdfCameraHostDriverBind enter");
auto *hdfCameraHostHost = new (std::nothrow) HdfCameraHostHost;
if (hdfCameraHostHost == nullptr) {
HDF_LOGE("%{public}s: failed to create create HdfCameraHostHost object", __func__);
return HDF_FAILURE;
}
hdfCameraHostHost->ioService.Dispatch = CameraHostDriverDispatch; //提供远端CameraHost调用方法
hdfCameraHostHost->ioService.Open = NULL;
hdfCameraHostHost->ioService.Release = NULL;
auto serviceImpl = ICameraHost::Get(true);
if (serviceImpl == nullptr) {
HDF_LOGE("%{public}s: failed to get of implement service", __func__);
delete hdfCameraHostHost;
return HDF_FAILURE;
}
HdfCameraService *hdfCameraService = reinterpret_cast<HdfCameraService *>(OsalMemAlloc(sizeof(HdfCameraService)));
if (hdfCameraService == nullptr) {
HDF_LOGE("HdfCameraHostDriverBind OsalMemAlloc HdfCameraService failed!");
hdfCameraHostHost->stub = OHOS::HDI::ObjectCollector::GetInstance().GetOrNewObject(serviceImpl,
ICameraHost::GetDescriptor()); //初始化Camera设备
if (hdfCameraHostHost->stub == nullptr) {
HDF_LOGE("%{public}s: failed to get stub object", __func__);
delete hdfCameraHostHost;
return HDF_FAILURE;
}
hdfCameraService->ioservice.Dispatch = CameraServiceDispatch; // 提供远端CameraHost调用方法
hdfCameraService->ioservice.Open = nullptr;
hdfCameraService->ioservice.Release = nullptr;
hdfCameraService->instance = CameraHostStubInstance(); // 初始化Camera设备
deviceObject->service = &hdfCameraService->ioservice;
deviceObject->service = &hdfCameraHostHost->ioService;
return HDF_SUCCESS;
}
```
......@@ -224,64 +237,98 @@ Camera驱动的开发过程主要包含以下步骤：
CameraHostProxy的OpenCamera()接口通过CMD_CAMERA_HOST_OPEN_CAMERA调用远端CameraHostStubOpenCamera()接口并获取ICameraDevice对象。
```
CamRetCode CameraHostProxy::OpenCamera(const std::string &cameraId, const OHOS::sptr<ICameraDeviceCallback> &callback, OHOS::sptr<ICameraDevice> &pDevice)
int32_t CameraHostProxy::OpenCamera(const std::string& cameraId, const sptr<ICameraDeviceCallback>& callbackObj,
sptr<ICameraDevice>& device)
{
int32_t ret = Remote()->SendRequest(CMD_CAMERA_HOST_REMOTE_OPEN_CAMERA, data, reply, option);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s: SendRequest failed, error code is %{public}d", __func__, ret);
return INVALID_ARGUMENT;
MessageParcel cameraHostData;
MessageParcel cameraHostReply;
MessageOption cameraHostOption(MessageOption::TF_SYNC);
if (!cameraHostData.WriteInterfaceToken(ICameraHost::GetDescriptor())) {
HDF_LOGE("%{public}s: failed to write interface descriptor!", __func__);
return HDF_ERR_INVALID_PARAM;
}
CamRetCode retCode = static_cast<CamRetCode>(reply.ReadInt32());
bool flag = reply.ReadBool();
if (flag) {
sptr<IRemoteObject> remoteCameraDevice = reply.ReadRemoteObject();
if (remoteCameraDevice == nullptr) {
HDF_LOGE("%{public}s: CameraHostProxy remoteCameraDevice is null", __func__);
}
pDevice = OHOS::iface_cast<ICameraDevice>(remoteCameraDevice);
if (!cameraHostData.WriteCString(cameraId.c_str())) {
HDF_LOGE("%{public}s: write cameraId failed!", __func__);
return HDF_ERR_INVALID_PARAM;
}
return retCode;
if (!cameraHostData.WriteRemoteObject(OHOS::HDI::ObjectCollector::GetInstance().GetOrNewObject(callbackObj,
ICameraDeviceCallback::GetDescriptor()))) {
HDF_LOGE("%{public}s: write callbackObj failed!", __func__);
return HDF_ERR_INVALID_PARAM;
}
int32_t cameraHostRet = Remote()->SendRequest(CMD_CAMERA_HOST_OPEN_CAMERA, cameraHostData, cameraHostReply, cameraHostOption);
if (cameraHostRet != HDF_SUCCESS) {
HDF_LOGE("%{public}s failed, error code is %{public}d", __func__, cameraHostRet);
return cameraHostRet;
}
device = hdi_facecast<ICameraDevice>(cameraHostReply.ReadRemoteObject());
return cameraHostRet;
}
```
Remote()->SendRequest调用上文提到的CameraHostServiceStubOnRemoteRequest()，根据cmdId进入CameraHostStubOpenCamera()接口，最终调用CameraHostImpl::OpenCamera()，该接口获取了CameraDevice并对硬件进行上电等操作。
```
CamRetCode CameraHostImpl::OpenCamera(const std::string &cameraId, const OHOS::sptr<ICameraDeviceCallback> &callback, OHOS::sptr<ICameraDevice> &device)
int32_t CameraHostImpl::OpenCamera(const std::string& cameraId, const sptr<ICameraDeviceCallback>& callbackObj,
sptr<ICameraDevice>& device)
{
std::shared_ptr<CameraDeviceImpl> cameraDevice = std::static_pointer_cast<CameraDeviceImpl>(itr->second);
CAMERA_LOGD("OpenCamera entry");
DFX_LOCAL_HITRACE_BEGIN;
if (CameraIdInvalid(cameraId) != RC_OK || callbackObj == nullptr) {
CAMERA_LOGW("open camera id is empty or callback is null.");
return INVALID_ARGUMENT;
}
auto itr = cameraDeviceMap_.find(cameraId);
if (itr == cameraDeviceMap_.end()) {
CAMERA_LOGE("camera device not found.");
return INSUFFICIENT_RESOURCES;
}
CAMERA_LOGD("OpenCamera cameraId find success.");
std::shared_ptr<CameraDeviceImpl> cameraDevice = itr->second;
if (cameraDevice == nullptr) {
CAMERA_LOGE("camera device is null.");
return INSUFFICIENT_RESOURCES;
}
CamRetCode ret = cameraDevice->SetCallback(callback);
if (ret != NO_ERROR) {
CAMERA_LOGW("set camera device callback failed.");
return ret;
}
CamRetCode ret = cameraDevice->SetCallback(callbackObj);
CHECK_IF_NOT_EQUAL_RETURN_VALUE(ret, HDI::Camera::V1_0::NO_ERROR, ret);
CameraHostConfig *config = CameraHostConfig::GetInstance();
if (config == nullptr) {
return INVALID_ARGUMENT;
}
CHECK_IF_PTR_NULL_RETURN_VALUE(config, INVALID_ARGUMENT);
std::vector<std::string> phyCameraIds;
RetCode rc = config->GetPhysicCameraIds(cameraId, phyCameraIds);
if (rc != RC_OK) {
CAMERA_LOGE("get physic cameraId failed.");
return DEVICE_ERROR;
}
if (CameraPowerUp(cameraId, phyCameraIds) != RC_OK) { // 对Camera硬件上电
if (CameraPowerUp(cameraId, phyCameraIds) != RC_OK) { //对Camera硬件上电
CAMERA_LOGE("camera powerup failed.");
CameraPowerDown(phyCameraIds);
return DEVICE_ERROR;
}
auto sptrDevice = deviceBackup_.find(cameraId);
if (sptrDevice == deviceBackup_.end()) {
#ifdef CAMERA_BUILT_ON_OHOS_LITE
deviceBackup_[cameraId] = cameraDevice;
#else
deviceBackup_[cameraId] = cameraDevice.get();
#endif
}
device = deviceBackup_[cameraId];
cameraDevice->SetStatus(true);
return NO_ERROR;
CAMERA_LOGD("open camera success.");
DFX_LOCAL_HITRACE_END;
return HDI::Camera::V1_0::NO_ERROR;
}
```
......@@ -290,28 +337,41 @@ Camera驱动的开发过程主要包含以下步骤：
CameraDeviceImpl定义了GetStreamOperator、UpdateSettings、SetResultMode和GetEnabledResult等方法，获取流操作方法如下：
```
CamRetCode CameraDeviceImpl::GetStreamOperator(const OHOS::sptr<IStreamOperatorCallback> &callback,
OHOS::sptr<IStreamOperator> &streamOperator)
int32_t CameraDeviceImpl::GetStreamOperator(const sptr<IStreamOperatorCallback>& callbackObj,
sptr<IStreamOperator>& streamOperator)
{
if (callback == nullptr) {
HDI_DEVICE_PLACE_A_WATCHDOG;
DFX_LOCAL_HITRACE_BEGIN;
if (callbackObj == nullptr) {
CAMERA_LOGW("input callback is null.");
return INVALID_ARGUMENT;
}
spCameraDeviceCallback_ = callback;
spCameraDeciceCallback_ = callbackObj;
if (spStreamOperator_ == nullptr) {
// 这里新建一个spStreamOperator对象传递给调用者，以便对stream进行各种操作。
spStreamOperator_ = new(std::nothrow) StreamOperatorImpl(spCameraDeviceCallback_, shared_from_this());
#ifdef CAMERA_BUILT_ON_OHOS_LITE
//这里创建一个spStreamOperator_ 对象传递给调用者，以便对stream进行各种操作
spStreamOperator_ = std::make_shared<StreamOperator>(spCameraDeciceCallback_, shared_from_this());
#else
spStreamOperator_ = new(std::nothrow) StreamOperator(spCameraDeciceCallback_, shared_from_this());
#endif
if (spStreamOperator_ == nullptr) {
CAMERA_LOGW("create stream operator failed.");
return DEVICE_ERROR;
}
spStreamOperator_->Init();
ismOperator_ = spStreamOperator_;
}
streamOperator = ismOperator_;
spStreamOperator_->SetRequestCallback([this](){
spCameraDeviceCallback_->OnError(REQUEST_TIMEOUT, 0);
#ifndef CAMERA_BUILT_ON_OHOS_LITE
CAMERA_LOGI("CameraDeviceImpl %{public}s: line: %{public}d", __FUNCTION__, __LINE__);
pipelineCore_->GetStreamPipelineCore()->SetCallback(
[this](const std::shared_ptr<CameraMetadata> &metadata) {
OnMetadataChanged(metadata);
});
#endif
DFX_LOCAL_HITRACE_END;
return HDI::Camera::V1_0::NO_ERROR;
}
```
......@@ -328,34 +388,64 @@ Camera驱动的开发过程主要包含以下步骤：
int dataSpace_;
StreamIntent intent_; // StreamIntent 如PREVIEW
bool tunneledMode_;
OHOS::sptr<OHOS::IBufferProducer> bufferQueue_; // 数据流bufferQueue可用streamCustomer->CreateProducer()接口创建
BufferProducerSequenceable bufferQueue_; // 数据流bufferQueue可用streamCustomer->CreateProducer()接口创建
int minFrameDuration_;
EncodeType encodeType_;
};
```
CreateStreams()接口是StreamOperatorImpl类中的方法，该接口的主要作用是创建一个StreamBase对象，通过StreamBase的Init方法初始化CreateBufferPool等操作。
CreateStreams()接口是StreamOperator（StreamOperatorImpl类是StreamOperator的基类）类中的方法，该接口的主要作用是创建一个StreamBase对象，通过StreamBase的Init方法初始化CreateBufferPool等操作。
```
RetCode StreamOperatorImpl::CreateStream(const std::shared_ptr<StreamInfo>& streamInfo)
int32_t StreamOperator::CreateStreams(const std::vector<StreamInfo>& streamInfos)
{
static std::map<StreamIntent, std::string> typeMap = {
{PREVIEW, "PREVIEW"},
{VIDEO, "VIDEO"},
{STILL_CAPTURE, "STILL_CAPTURE"},
{POST_VIEW, "POST_VIEW"}, {ANALYZE, "ANALYZE"},
{CUSTOM, "CUSTOM"}
};
auto itr = typeMap.find(streamInfo->intent_);
if (itr == typeMap.end()) {
CAMERA_LOGE("do not support stream type. [type = %{public}d]", streamInfo->intent_);
return RC_ERROR;
PLACE_A_NOKILL_WATCHDOG(requestTimeoutCB_);
DFX_LOCAL_HITRACE_BEGIN;
for (const auto& it : streamInfos) {
CHECK_IF_NOT_EQUAL_RETURN_VALUE(CheckStreamInfo(it), true, INVALID_ARGUMENT);
CAMERA_LOGI("streamId:%{public}d and format:%{public}d and width:%{public}d and height:%{public}d",
it.streamId_, it.format_, it.width_, it.height_);
if (streamMap_.count(it.streamId_) > 0) {
CAMERA_LOGE("stream [id = %{public}d] has already been created.", it.streamId_);
return INVALID_ARGUMENT;
}
std::shared_ptr<IStream> stream = StreamFactory::Instance().CreateShared( //创建Stream实例
IStream::g_availableStreamType[it.intent_], it.streamId_, it.intent_, pipelineCore_, messenger_);
if (stream == nullptr) {
CAMERA_LOGE("create stream [id = %{public}d] failed.", it.streamId_);
return INSUFFICIENT_RESOURCES;
}
StreamConfiguration scg;
StreamInfoToStreamConfiguration(scg, it);
RetCode rc = stream->ConfigStream(scg);
if (rc != RC_OK) {
CAMERA_LOGE("configure stream %{public}d failed", it.streamId_);
return INVALID_ARGUMENT;
}
if (!scg.tunnelMode && (it.bufferQueue_)->producer_ != nullptr) {
CAMERA_LOGE("stream [id:%{public}d] is not tunnel mode, can't bind a buffer producer", it.streamId_);
return INVALID_ARGUMENT;
}
if ((it.bufferQueue_)->producer_ != nullptr) {
auto tunnel = std::make_shared<StreamTunnel>();
CHECK_IF_PTR_NULL_RETURN_VALUE(tunnel, INSUFFICIENT_RESOURCES);
rc = tunnel->AttachBufferQueue((it.bufferQueue_)->producer_);
CHECK_IF_NOT_EQUAL_RETURN_VALUE(rc, RC_OK, INVALID_ARGUMENT);
if (stream->AttachStreamTunnel(tunnel) != RC_OK) {
CAMERA_LOGE("attach buffer queue to stream [id = %{public}d] failed", it.streamId_);
return INVALID_ARGUMENT;
}
}
{
std::lock_guard<std::mutex> l(streamLock_);
streamMap_[stream->GetStreamId()] = stream;
}
CAMERA_LOGI("create stream success [id:%{public}d] [type:%{public}s]", stream->GetStreamId(),
IStream::g_availableStreamType[it.intent_].c_str());
}
std::shared_ptr<StreamBase> stream = StreamFactory::Instance().CreateShared(itr->second); // 创建StreamBase实例
RetCode rc = stream->Init(streamInfo);
return RC_OK;
}
DFX_LOCAL_HITRACE_END;
return HDI::Camera::V1_0::NO_ERROR;
}
```
7. **配置流**
......@@ -363,37 +453,58 @@ Camera驱动的开发过程主要包含以下步骤：
CommitStreams()是配置流的接口，必须在创建流之后调用，其主要作用是初始化Pipeline和创建Pipeline。
```
CamRetCode StreamOperatorImpl::CommitStreams(OperationMode mode, const std::shared_ptr<Camera::CameraMetadata>& modeSetting)
int32_t StreamOperator::CommitStreams(OperationMode mode, const std::vector<uint8_t>& modeSetting)
{
auto cameraDevice = cameraDevice_.lock();
if (cameraDevice == nullptr) {
CAMERA_LOGE("camera device closed.");
return CAMERA_CLOSED;
}
std::shared_ptr<IPipelineCore> PipelineCore =
std::static_pointer_cast<CameraDeviceImpl>(cameraDevice)->GetPipelineCore();
if (PipelineCore == nullptr) {
CAMERA_LOGE("get pipeline core failed.");
return CAMERA_CLOSED;
CAMERA_LOGV("enter");
CHECK_IF_PTR_NULL_RETURN_VALUE(streamPipeline_, DEVICE_ERROR);
PLACE_A_NOKILL_WATCHDOG(requestTimeoutCB_);
if (modeSetting.empty()) {
CAMERA_LOGE("input vector is empty");
return INVALID_ARGUMENT;
}
DFX_LOCAL_HITRACE_BEGIN;
streamPipeCore_ = PipelineCore->GetStreamPipelineCore();
if (streamPipeCore_ == nullptr) {
CAMERA_LOGE("get stream pipeline core failed.");
return DEVICE_ERROR;
std::vector<StreamConfiguration> configs = {};
{
std::lock_guard<std::mutex> l(streamLock_);
std::transform(streamMap_.begin(), streamMap_.end(), std::back_inserter(configs),
[](auto &iter) { return iter.second->GetStreamAttribute(); });
}
RetCode rc = streamPipeCore_->Init(); // 对pipelinecore的初始化
std::shared_ptr<CameraMetadata> setting;
MetadataUtils::ConvertVecToMetadata(modeSetting, setting);
DynamicStreamSwitchMode method = streamPipeline_->CheckStreamsSupported(mode, setting, configs);
if (method == DYNAMIC_STREAM_SWITCH_NOT_SUPPORT) {
return INVALID_ARGUMENT;
}
if (method == DYNAMIC_STREAM_SWITCH_NEED_INNER_RESTART) {
std::lock_guard<std::mutex> l(streamLock_);
for (auto it : streamMap_) {
it.second->StopStream();
}
}
{
std::lock_guard<std::mutex> l(streamLock_);
for (auto it : streamMap_) {
if (it.second->CommitStream() != RC_OK) {
CAMERA_LOGE("commit stream [id = %{public}d] failed.", it.first);
return DEVICE_ERROR;
}
}
}
RetCode rc = streamPipeline_->PreConfig(setting); //设备流配置
if (rc != RC_OK) {
CAMERA_LOGE("stream pipeline core init failed.");
CAMERA_LOGE("prepare mode settings failed");
return DEVICE_ERROR;
}
rc = streamPipeCore_->CreatePipeline(mode); // 创建一个pipeline
rc = streamPipeline_->CreatePipeline(mode); //创建一个pipeline
if (rc != RC_OK) {
CAMERA_LOGE("create pipeline failed.");
return INVALID_ARGUMENT;
}
return NO_ERROR;
DFX_LOCAL_HITRACE_END;
return HDI::Camera::V1_0::NO_ERROR;
}
```
......@@ -403,66 +514,113 @@ Camera驱动的开发过程主要包含以下步骤：
```
using CaptureInfo = struct _CaptureInfo {
std::vector<int> streamIds_; //需要Capture的streamIds
std::shared_ptr<Camera::CameraMetadata> captureSetting_; // 这里填充camera ability 可通过CameraHost 的GetCameraAbility()接口获取
bool enableShutterCallback_;
int[] streamIds_; //需要Capture的streamIds
unsigned char[] captureSetting_; // 这里填充camera ability 可通过CameraHost 的GetCameraAbility()接口获取
bool enableShutterCallback_;
};
```
StreamOperatorImpl中的Capture方法主要调用CreateCapture()接口去捕获数据流：
StreamOperator中的Capture方法主要是捕获数据流：
```
CamRetCode StreamOperatorImpl::Capture(int captureId, const std::shared_ptr<CaptureInfo>& captureInfo, bool isStreaming)
int32_t StreamOperator::Capture(int32_t captureId, const CaptureInfo& info, bool isStreaming)
{
if (!ValidCaptureInfo(captureId, captureInfo)) {
CAMERA_LOGE("capture streamIds is empty. [captureId = %d]", captureId);
return INVALID_ARGUMENT;
}
std::shared_ptr<CameraCapture> cameraCapture = nullptr;
RetCode rc = CreateCapture(captureId, captureInfo, isStreaming, cameraCapture);
if (rc != RC_OK) {
CAMERA_LOGE("create capture is failed.");
return DEVICE_ERROR;
CHECK_IF_EQUAL_RETURN_VALUE(captureId < 0, true, INVALID_ARGUMENT);
PLACE_A_NOKILL_WATCHDOG(requestTimeoutCB_);
DFX_LOCAL_HITRACE_BEGIN;
for (auto id : info.streamIds_) {
std::lock_guard<std::mutex> l(streamLock_);
auto it = streamMap_.find(id);
if (it == streamMap_.end()) {
return INVALID_ARGUMENT;
}
}
{
std::unique_lock<std::mutex> lock(captureMutex_);
camerCaptureMap_.insert(std::make_pair(captureId, cameraCapture));
std::lock_guard<std::mutex> l(requestLock_);
auto itr = requestMap_.find(captureId);
if (itr != requestMap_.end()) {
return INVALID_ARGUMENT;
}
}
rc = StartThread();
if (rc != RC_OK) {
CAMERA_LOGE("preview start failed.");
return DEVICE_ERROR;
std::shared_ptr<CameraMetadata> captureSetting;
MetadataUtils::ConvertVecToMetadata(info.captureSetting_, captureSetting);
CaptureSetting setting = captureSetting;
auto request =
std::make_shared<CaptureRequest>(captureId, info.streamIds_.size(), setting,
info.enableShutterCallback_, isStreaming);
for (auto id : info.streamIds_) {
RetCode rc = streamMap_[id]->AddRequest(request);
if (rc != RC_OK) {
return DEVICE_ERROR;
}
}
{
std::lock_guard<std::mutex> l(requestLock_);
requestMap_[captureId] = request;
}
return NO_ERROR;
return HDI::Camera::V1_0::NO_ERROR;
}
```
9. 取消捕获和释放离线流
StreamOperatorImpl类中的CancelCapture()接口的主要作用是根据captureId取消数据流的捕获。
StreamOperator类中的CancelCapture()接口的主要作用是根据captureId取消数据流的捕获。
```
CamRetCode StreamOperatorImpl::CancelCapture(int captureId)
int32_t StreamOperator::CancelCapture(int32_t captureId)
{
auto itr = camerCaptureMap_.find(captureId); // 根据captureId 在Map中查找对应的CameraCapture对象
RetCode rc = itr->second->Cancel(); // 调用CameraCapture中Cancel方法结束数据捕获
std::unique_lock<std::mutex> lock(captureMutex_);
camerCaptureMap_.erase(itr); // 擦除该CameraCapture对象
return NO_ERROR;
CHECK_IF_EQUAL_RETURN_VALUE(captureId < 0, true, INVALID_ARGUMENT);
PLACE_A_NOKILL_WATCHDOG(requestTimeoutCB_);
DFX_LOCAL_HITRACE_BEGIN;
std::lock_guard<std::mutex> l(requestLock_);
auto itr = requestMap_.find(captureId); //根据captureId 在Map中查找对应的CameraCapture对象
if (itr == requestMap_.end()) {
CAMERA_LOGE("can't cancel capture [id = %{public}d], this capture doesn't exist", captureId);
return INVALID_ARGUMENT;
}
RetCode rc = itr->second->Cancel(); //调用CameraCapture中Cancel方法结束数据捕获
if (rc != RC_OK) {
return DEVICE_ERROR;
}
requestMap_.erase(itr); //擦除该CameraCapture对象
DFX_LOCAL_HITRACE_END;
return HDI::Camera::V1_0::NO_ERROR;
}
```
StreamOperatorImpl类中的ReleaseStreams接口的主要作用是释放之前通过CreateStream()和CommitStreams()接口创建的流，并销毁Pipeline。
StreamOperator类中的ReleaseStreams接口的主要作用是释放之前通过CreateStream()和CommitStreams()接口创建的流，并销毁Pipeline。
```
CamRetCode StreamOperatorImpl::ReleaseStreams(const std::vector<int>& streamIds)
int32_t StreamOperator::ReleaseStreams(const std::vector<int32_t>& streamIds)
{
RetCode rc = DestroyStreamPipeline(streamIds); // 销毁该streamIds 的pipeline
rc = DestroyHostStreamMgr(streamIds);
rc = DestroyStreams(streamIds); // 销毁该streamIds 的 Stream
return NO_ERROR;
PLACE_A_NOKILL_WATCHDOG(requestTimeoutCB_);
DFX_LOCAL_HITRACE_BEGIN;
for (auto id : streamIds) {
std::lock_guard<std::mutex> l(streamLock_);
auto it = streamMap_.find(id);
if (it == streamMap_.end()) {
continue;
}
if (it->second->IsRunning()) {
it->second->StopStream();
}
it->second->DumpStatsInfo();
streamMap_.erase(it);
}
for (auto id : streamIds) {
CHECK_IF_EQUAL_RETURN_VALUE(id < 0, true, INVALID_ARGUMENT);
}
DFX_LOCAL_HITRACE_END;
return HDI::Camera::V1_0::NO_ERROR;
}
```
......@@ -508,16 +666,39 @@ Camera驱动的开发过程主要包含以下步骤：
初始化CameraHost函数实现如下，这里调用了HDI接口ICameraHost::Get()去获取demoCameraHost，并对其设置回调函数。
```
RetCode CameraDemo::InitSensors()
RetCode OhosCameraDemo::InitSensors()
{
demoCameraHost_ = ICameraHost::Get(DEMO_SERVICE_NAME);
int rc = 0;
CAMERA_LOGD("demo test: InitSensors enter");
if (demoCameraHost_ != nullptr) {
return RC_OK;
}
#ifdef CAMERA_BUILT_ON_OHOS_LITE
demoCameraHost_ = OHOS::Camera::CameraHost::CreateCameraHost();
#else
constexpr const char *DEMO_SERVICE_NAME = "camera_service";
demoCameraHost_ = ICameraHost::Get(DEMO_SERVICE_NAME, false);
#endif
if (demoCameraHost_ == nullptr) {
CAMERA_LOGE("demo test: ICameraHost::Get error");
return RC_ERROR;
}
hostCallback_ = new CameraHostCallback();
#ifdef CAMERA_BUILT_ON_OHOS_LITE
hostCallback_ = std::make_shared<DemoCameraHostCallback>();
#else
hostCallback_ = new DemoCameraHostCallback();
#endif
rc = demoCameraHost_->SetCallback(hostCallback_);
if (rc != HDI::Camera::V1_0::NO_ERROR) {
CAMERA_LOGE("demo test: demoCameraHost_->SetCallback(hostCallback_) error");
return RC_ERROR;
}
CAMERA_LOGD("demo test: InitSensors exit");
return RC_OK;
}
```
......@@ -525,14 +706,55 @@ Camera驱动的开发过程主要包含以下步骤：
初始化CameraDevice函数实现如下，这里调用了GetCameraIds(cameraIds_)，GetCameraAbility(cameraId, ability_)，OpenCamera(cameraIds_.front(), callback, demoCameraDevice_)等接口实现了demoCameraHost的获取。
```
RetCode CameraDemo::InitCameraDevice()
RetCode OhosCameraDemo::InitCameraDevice()
{
int rc = 0;
CAMERA_LOGD("demo test: InitCameraDevice enter");
if (demoCameraHost_ == nullptr) {
CAMERA_LOGE("demo test: InitCameraDevice demoCameraHost_ == nullptr");
return RC_ERROR;
}
(void)demoCameraHost_->GetCameraIds(cameraIds_);
if (cameraIds_.empty()) {
return RC_ERROR;
}
const std::string cameraId = cameraIds_.front();
demoCameraHost_->GetCameraAbility(cameraId, ability_);
sptr<CameraDeviceCallback> callback = new CameraDeviceCallback();
demoCameraHost_->GetCameraAbility(cameraId, cameraAbility_);
MetadataUtils::ConvertVecToMetadata(cameraAbility_, ability_);
GetFaceDetectMode(ability_);
GetFocalLength(ability_);
GetAvailableFocusModes(ability_);
GetAvailableExposureModes(ability_);
GetExposureCompensationRange(ability_);
GetExposureCompensationSteps(ability_);
GetAvailableMeterModes(ability_);
GetAvailableFlashModes(ability_);
GetMirrorSupported(ability_);
GetStreamBasicConfigurations(ability_);
GetFpsRange(ability_);
GetCameraPosition(ability_);
GetCameraType(ability_);
GetCameraConnectionType(ability_);
GetFaceDetectMaxNum(ability_);
#ifdef CAMERA_BUILT_ON_OHOS_LITE
std::shared_ptr<CameraDeviceCallback> callback = std::make_shared<CameraDeviceCallback>();
#else
sptr<DemoCameraDeviceCallback> callback = new DemoCameraDeviceCallback();
#endif
rc = demoCameraHost_->OpenCamera(cameraIds_.front(), callback, demoCameraDevice_);
if (rc != HDI::Camera::V1_0::NO_ERROR || demoCameraDevice_ == nullptr) {
CAMERA_LOGE("demo test: InitCameraDevice OpenCamera failed");
return RC_ERROR;
}
CAMERA_LOGD("demo test: InitCameraDevice exit");
return RC_OK;
}
```
......@@ -540,76 +762,87 @@ Camera驱动的开发过程主要包含以下步骤：
2. PreviewOn()接口包含配置流、开启预览流和启动Capture动作。该接口执行完成后Camera预览通路已经开始运转并开启了两路流，一路流是preview，另外一路流是capture或者video，两路流中仅对preview流进行capture动作。
```
static RetCode PreviewOn(int mode, const std::shared_ptr<CameraDemo>& mainDemo)
static RetCode PreviewOn(int mode, const std::shared_ptr<OhosCameraDemo>& mainDemo)
{
rc = mainDemo->StartPreviewStream(); // 配置preview流
if (mode == 0) {
rc = mainDemo->StartCaptureStream(); // 配置capture流
} else {
rc = mainDemo->StartVideoStream(); // 配置video流
}
rc = mainDemo->CaptureON(STREAM_ID_PREVIEW, CAPTURE_ID_PREVIEW, CAPTURE_PREVIEW); // 将preview流capture
RetCode rc = RC_OK;
CAMERA_LOGD("main test: PreviewOn enter");
rc = mainDemo->StartPreviewStream(); //配置preview流
if (rc != RC_OK) {
CAMERA_LOGE("main test: PreviewOn StartPreviewStream error");
return RC_ERROR;
}
if (mode == 0) {
rc = mainDemo->StartCaptureStream(); //配置capture流
if (rc != RC_OK) {
CAMERA_LOGE("main test: PreviewOn StartCaptureStream error");
return RC_ERROR;
}
} else {
rc = mainDemo->StartVideoStream(); //配置video流
if (rc != RC_OK) {
CAMERA_LOGE("main test: PreviewOn StartVideoStream error");
return RC_ERROR;
}
}
rc = mainDemo->CaptureON(STREAM_ID_PREVIEW, CAPTURE_ID_PREVIEW, CAPTURE_PREVIEW);
if (rc != RC_OK) {
CAMERA_LOGE("main test: PreviewOn mainDemo->CaptureON() preview error");
return RC_ERROR;
}
CAMERA_LOGD("main test: PreviewOn exit");
return RC_OK;
}
```
StartCaptureStream()、StartVideoStream()和StartPreviewStream()接口都会调用CreateStream()接口，只是传入的参数不同。
```
RetCode CameraDemo::StartVideoStream()
{
RetCode rc = RC_OK;
if (isVideoOn_ == 0) {
isVideoOn_ = 1;
rc = CreateStream(STREAM_ID_VIDEO, streamCustomerVideo_, VIDEO); // 如需启preview或者capture流更改该接口参数即可。
}
return RC_OK;
}
```
CreateStream()方法调用HDI接口去配置和创建流，首先调用HDI接口去获取StreamOperation对象，然后创建一个StreamInfo。调用CreateStreams()和CommitStreams()实际创建流并配置流。
```
RetCode CameraDemo::CreateStreams(const int streamIdSecond, StreamIntent intent)
RetCode OhosCameraDemo::CreateStream(const int streamId, std::shared_ptr<StreamCustomer> &streamCustomer,
StreamIntent intent)
{
std::vector<std::shared_ptr<StreamInfo>> streamInfos;
std::vector<std::shared_ptr<StreamInfo>>().swap(streamInfos);
GetStreamOpt(); // 获取StreamOperator对象
std::shared_ptr<StreamInfo> previewStreamInfo = std::make_shared<StreamInfo>();
SetStreamInfo(previewStreamInfo, streamCustomerPreview_, STREAM_ID_PREVIEW, PREVIEW); // 填充StreamInfo
if (previewStreamInfo->bufferQueue_ == nullptr) {
CAMERA_LOGE("demo test: CreateStream CreateProducer(); is nullptr\n");
int rc = 0;
CAMERA_LOGD("demo test: CreateStream enter");
GetStreamOpt(); //获取StreamOperator对象
if (streamOperator_ == nullptr) {
CAMERA_LOGE("demo test: CreateStream GetStreamOpt() is nullptr\n");
return RC_ERROR;
}
streamInfos.push_back(previewStreamInfo);
std::shared_ptr<StreamInfo> secondStreamInfo = std::make_shared<StreamInfo>();
if (streamIdSecond == STREAM_ID_CAPTURE) {
SetStreamInfo(secondStreamInfo, streamCustomerCapture_, STREAM_ID_CAPTURE, intent);
} else {
SetStreamInfo(secondStreamInfo, streamCustomerVideo_, STREAM_ID_VIDEO, intent);
}
if (secondStreamInfo->bufferQueue_ == nullptr) {
CAMERA_LOGE("demo test: CreateStreams CreateProducer() secondStreamInfo is nullptr\n");
StreamInfo streamInfo = {0};
SetStreamInfo(streamInfo, streamCustomer, streamId, intent); //填充StreamInfo流
if (streamInfo.bufferQueue_->producer_ == nullptr) {
CAMERA_LOGE("demo test: CreateStream CreateProducer(); is nullptr\n");
return RC_ERROR;
}
streamInfos.push_back(secondStreamInfo);
rc = streamOperator_->CreateStreams(streamInfos); // 创建流
if (rc != Camera::NO_ERROR) {
std::vector<StreamInfo> streamInfos;
streamInfos.push_back(streamInfo);
rc = streamOperator_->CreateStreams(streamInfos); //创建流
if (rc != HDI::Camera::V1_0::NO_ERROR) {
CAMERA_LOGE("demo test: CreateStream CreateStreams error\n");
return RC_ERROR;
}
rc = streamOperator_->CommitStreams(Camera::NORMAL, ability_);
if (rc != Camera::NO_ERROR) {
rc = streamOperator_->CommitStreams(NORMAL, cameraAbility_);
if (rc != HDI::Camera::V1_0::NO_ERROR) {
CAMERA_LOGE("demo test: CreateStream CommitStreams error\n");
std::vector<int> streamIds = {STREAM_ID_PREVIEW, streamIdSecond};
std::vector<int> streamIds;
streamIds.push_back(streamId);
streamOperator_->ReleaseStreams(streamIds);
return RC_ERROR;
}
CAMERA_LOGD("demo test: CreateStream exit");
return RC_OK;
}
```
......@@ -617,26 +850,66 @@ Camera驱动的开发过程主要包含以下步骤：
CaptureON()接口调用streamOperator的Capture()方法获取Ｃamera数据并轮转buffer，拉起一个线程接收相应类型的数据。
```
RetCode CameraDemo::CaptureON(const int streamId, const int captureId, CaptureMode mode)
RetCode OhosCameraDemo::CaptureON(const int streamId,
const int captureId, CaptureMode mode)
{
std::shared_ptr<Camera::CaptureInfo> captureInfo = std::make_shared<Camera::CaptureInfo>(); // 创建并填充CaptureInfo
captureInfo->streamIds_ = {streamId};
captureInfo->captureSetting_ = ability_;
captureInfo->enableShutterCallback_ = false;
int rc = streamOperator_->Capture(captureId, captureInfo, true); // 实际capture开始，buffer轮转开始
CAMERA_LOGI("demo test: CaptureON enter streamId == %{public}d and captureId == %{public}d and mode == %{public}d",
streamId, captureId, mode);
std::lock_guard<std::mutex> l(metaDatalock_);
if (mode == CAPTURE_SNAPSHOT) {
constexpr double latitude = 27.987500; // dummy data: Qomolangma latitde
constexpr double longitude = 86.927500; // dummy data: Qomolangma longituude
constexpr double altitude = 8848.86; // dummy data: Qomolangma altitude
constexpr size_t entryCapacity = 100;
constexpr size_t dataCapacity = 2000;
captureSetting_ = std::make_shared<CameraSetting>(entryCapacity, dataCapacity);
captureQuality_ = OHOS_CAMERA_JPEG_LEVEL_HIGH;
captureOrientation_ = OHOS_CAMERA_JPEG_ROTATION_270;
mirrorSwitch_ = OHOS_CAMERA_MIRROR_ON;
gps_.push_back(latitude);
gps_.push_back(longitude);
gps_.push_back(altitude);
captureSetting_->addEntry(OHOS_JPEG_QUALITY, static_cast<void*>(&captureQuality_),
sizeof(captureQuality_));
captureSetting_->addEntry(OHOS_JPEG_ORIENTATION, static_cast<void*>(&captureOrientation_),
sizeof(captureOrientation_));
captureSetting_->addEntry(OHOS_CONTROL_CAPTURE_MIRROR, static_cast<void*>(&mirrorSwitch_),
sizeof(mirrorSwitch_));
captureSetting_->addEntry(OHOS_JPEG_GPS_COORDINATES, gps_.data(), gps_.size());
}
std::vector<uint8_t> setting;
MetadataUtils::ConvertMetadataToVec(captureSetting_, setting);
captureInfo_.streamIds_ = {streamId};
if (mode == CAPTURE_SNAPSHOT) {
captureInfo_.captureSetting_ = setting;
} else {
captureInfo_.captureSetting_ = cameraAbility_;
}
captureInfo_.enableShutterCallback_ = false;
int rc = streamOperator_->Capture(captureId, captureInfo_, true); //实际capture开始，buffer轮转开始
if (rc != HDI::Camera::V1_0::NO_ERROR) {
CAMERA_LOGE("demo test: CaptureStart Capture error\n");
streamOperator_->ReleaseStreams(captureInfo_.streamIds_);
return RC_ERROR;
}
if (mode == CAPTURE_PREVIEW) {
streamCustomerPreview_->ReceiveFrameOn(nullptr); // 创建预览线程接收递上来的buffer
streamCustomerPreview_->ReceiveFrameOn(nullptr); //创建预览线程接收传递上来的buffer
} else if (mode == CAPTURE_SNAPSHOT) {
streamCustomerCapture_->ReceiveFrameOn([this](void* addr, const uint32_t size) { // 创建capture线程通过StoreImage回调接收递上来的buffer
streamCustomerCapture_->ReceiveFrameOn([this](void* addr, const uint32_t size) { //创建capture线程通过StoreImage回调接收传递上来的buffer
StoreImage(addr, size);
});
} else if (mode == CAPTURE_VIDEO) {
OpenVideoFile();
streamCustomerVideo_->ReceiveFrameOn([this](void* addr, const uint32_t size) {// 创建Video线程通过StoreVideo回调接收递上来的buffer
streamCustomerVideo_->ReceiveFrameOn([this](void* addr, const uint32_t size) { //创建video线程通过StoreImage回调接收传递上来的buffer
StoreVideo(addr, size);
});
}
CAMERA_LOGD("demo test: CaptureON exit");
return RC_OK;
}
```
......@@ -644,53 +917,55 @@ Camera驱动的开发过程主要包含以下步骤：
3. ManuList()函数从控制台通过fgets()接口获取字符，不同字符所对应demo支持的功能不同，并打印出该demo所支持功能的菜单。
```
static void ManuList(const std::shared_ptr<CameraDemo>& mainDemo,
static void ManuList(const std::shared_ptr<OhosCameraDemo>& mainDemo,
const int argc, char** argv)
{
int idx, c;
int awb = 1;
constexpr char shortOptions[] = "h:cwvaqof:";
c = getopt_long(argc, argv, shortOptions, longOptions, &idx);
while(1) {
bool isAwb = true;
const char *shortOptions = "h:cwvaeqof:";
c = getopt_long(argc, argv, shortOptions, LONG_OPTIONS, &idx);
while (1) {
switch (c) {
case 'h':
c = PutMenuAndGetChr(); // 打印菜单
c = PutMenuAndGetChr(); //打印菜单
break;
case 'f':
FlashLightTest(mainDemo); // 手电筒功能测试
case 'f':
FlashLightTest(mainDemo); //手电筒功能测试
c = PutMenuAndGetChr();
break;
case 'o':
OfflineTest(mainDemo); // Offline功能测试
OfflineTest(mainDemo); //Offline功能测试
c = PutMenuAndGetChr();
break;
case 'c':
CaptureTest(mainDemo); // Capture功能测试
CaptureTest(mainDemo); Capture功能测试
c = PutMenuAndGetChr();
break;
case 'w': // AWB功能测试
if (awb) {
case 'w': //AWB功能测试
if (isAwb) {
mainDemo->SetAwbMode(OHOS_CAMERA_AWB_MODE_INCANDESCENT);
} else {
mainDemo->SetAwbMode(OHOS_CAMERA_AWB_MODE_OFF);
}
awb = !awb;
isAwb = !isAwb;
c = PutMenuAndGetChr();
break;
case 'a': // AE功能测试
case 'a': //AE功能测试
mainDemo->SetAeExpo();
c = PutMenuAndGetChr();
break;
case 'v': // Video功能测试
case 'e': //Metadata测试
mainDemo->SetMetadata();
c = PutMenuAndGetChr();
break;
case 'v': //VIDEO功能测试
VideoTest(mainDemo);
c = PutMenuAndGetChr();
break;
case 'q': // 退出demo
case 'q': //退出demo
PreviewOff(mainDemo);
mainDemo->QuitDemo();
exit(EXIT_SUCCESS);
return;
default:
CAMERA_LOGE("main test: command error please retry input command");
c = PutMenuAndGetChr();
......@@ -732,8 +1007,23 @@ Camera驱动的开发过程主要包含以下步骤：
"-w | --set WB Set white balance Cloudy\n"
"-v | --video capture Video of 10s\n"
"-a | --Set AE Set Auto exposure\n"
"-e | --Set Metadeta Set Metadata\n"
"-f | --Set Flashlight Set flashlight ON 5s OFF\n"
"-q | --quit stop preview and quit this app\n");
```
4、编译用例
在drivers/peripheral/camera/hal/BUILD.gn文件中的deps中添加"init:ohos_camera_demo",示例代码如下：
```
deps = [
"buffer_manager:camera_buffer_manager",
"device_manager:camera_device_manager",
"hdi_impl:camera_host_service_1.0",
"pipeline_core:camera_pipeline_core",
"utils:camera_utils",
"init:ohos_camera_demo",
]
```
执行全量编译命令./build.sh --product-name rk3568 --ccache，生成可执行二进制文件ohos_camera_demo，路径为：out/rk3568/packages/phone/vendor/bin/。将可执行文件ohos_camera_demo导入板子，修改权限直接运行即可。
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