和你一起终身学习，这里是程序员 Android
经典好文推荐，通过阅读本文，您将收获以下知识点:
一、camera configureStreams 流程
二、Log 分析
一、camera configureStreams 流程
1.1 相机api简述
as we all know Android Camera API的 步骤
（1）、监听和枚举相机设备
get_number_of_cameras、get_camera_characteristic
（2）、打开设备并连接监听器
connect、open
（3）、配置目标使用情形的输出（如static 、capture、video等）
configure_stream
(4）、为目标使用情形创建请求 （5）捕获/重复请求和连拍
process_capture_request
(6) 、接受结果metadata和图片数据
proces_capture_result
(7)、切换使用情形时，返回第三步
1.2 原文阅读
The framework calls camera3_device_t->ops->configure_streams() with a list * of input/output streams to the HAL device.
简单翻译-->
framework调用结构体camera_device方法ops调用结构体camera3_device_ops的configure_streams方法配流，camera3_device_t-> ops-> configure_streams（），并把input stream&output stream 的列表作为参数送到Hal层。
1.3 结构体
hardware/libhardware/include/hardware/camera3.h
camera3_device_ops_t 映射函数指针操作： hardware/libhardware/modules/camera/3_0/Camera.cpp
1.4 代码流程
hardware/interfaces/camera/device/3.2/default/CameraDeviceSession.cpp
Return CameraDeviceSession::configureStreams(
const StreamConfiguration& requestedConfiguration,
ICameraDeviceSession::configureStreams_cb _hidl_cb) {
Status status = initStatus();
HalStreamConfiguration outStreams;
ATRACE_BEGIN("camera3->configure_streams");
status_t ret = mDevice->ops->configure_streams(mDevice, &stream_list);
ATRACE_END();
}
frameworks/av/services/camera/libcameraservice/device3/Camera3Device.cpp
status_t Camera3Device::configureStreamsLocked(int operatingMode,
const CameraMetadata& sessionParams, bool notifyRequestThread) {
//配流开始log
ALOGV("%s: Camera %s: Starting stream configuration", __FUNCTION__, mId.string());
略...
//创建buffer
const camera_metadata_t *sessionBuffer = sessionParams.getAndLock();
res = mInterface->configureStreams(sessionBuffer, &config, bufferSizes);
//这里还有重新配流的代码，省略
// Update device state
const camera_metadata_t *newSessionParams = sessionParams.getAndLock();
省略部分代码
ALOGV("%s: Camera %s: Stream configuration complete", __FUNCTION__, mId.string());
// tear down the deleted streams after configure streams.
mDeletedStreams.clear();
return OK;
}
status_t Camera3Device::HalInterface::configureStreams(const camera_metadata_t *sessionParams,
camera3_stream_configuration *config, const std::vector& bufferSizes) {
ATRACE_NAME("CameraHal::configureStreams");
略...
auto err = mHidlSession_3_4->configureStreams_3_4(
requestedConfiguration3_4, configStream34Cb);
略...
return res;
}
vendor/mediatek/proprietary/hardware/mtkcam3/main/hal/device/3.x/device/CameraDevice3SessionImpl.cpp
//V3_4
Return
ThisNamespace::
configureStreams_3_3(const V3_2::StreamConfiguration& requestedConfiguration, configureStreams_3_3_cb _hidl_cb)
{ 省略部分代码
err = onConfigureStreamsLocked(requestedConfiguration, halStreamConfiguration);
}
vendor/mediatek/proprietary/hardware/mtkcam3/main/hal/device/3.x/device/CameraDevice3SessionImpl.cpp
auto
ThisNamespace::
onConfigureStreamsLocked(
const WrappedStreamConfiguration& requestedConfiguration,
WrappedHalStreamConfiguration& halConfiguration
) -> ::android::status_t
{
IAppStreamManager::ConfigAppStreams appStreams;
auto pAppStreamManager = getSafeAppStreamManager();
err = pAppStreamManager->beginConfigureStreams(requestedConfiguration, halConfiguration, appStreams);
auto pPipelineModel = getSafePipelineModel();
err = pPipelineModel->configure(pParams); //配置pipeline
err = pAppStreamManager->endConfigureStreams(halConfiguration);
}
vendor/mediatek/proprietary/hardware/mtkcam3/main/hal/device/3.x/app/AppStreamMgr.cpp
auto
AppStreamMgr::
beginConfigureStreams(
const V3_5::StreamConfiguration& requestedConfiguration,
V3_4::HalStreamConfiguration& halConfiguration,
ConfigAppStreams& rStreams
) -> int
{
auto err = mConfigHandler->beginConfigureStreams(requestedConfiguration, halConfiguration, rStreams);
}
vendor/mediatek/proprietary/hardware/mtkcam/main/hal/device/3.x/app/AppStreamMgr.ConfigHandler.cpp
简述下这里面干了些啥事
1 .检测stream
2 .设置OperationMode
3.生成MetaStreamInfo，并把前者加到Stream中
auto
ThisNamespace::
beginConfigureStreams(
const V3_5::StreamConfiguration& requestedConfiguration,
V3_4::HalStreamConfiguration& halConfiguration,
ConfigAppStreams& rStreams
) -> int
{
rStreams.vMinFrameDuration.add( //这块为上层下发的流配置格式
pStreamInfo->getStreamId(),
mEntryMinDuration.itemAt(j + 3, Type2Type())
);
rStreams.vStallFrameDuration.add( //这块为上层下发的流配置格式
pStreamInfo->getStreamId(),
mEntryStallDuration.itemAt(j + 3, Type2Type())
);
MY_LOGI("[addFrameDuration] format:%" PRId64 " size:%" PRId64 "x%" PRId64 " min_duration:%" PRId64 ", stall_duration:%" PRId64 ,
mEntryMinDuration.itemAt(j, Type2Type()),
mEntryMinDuration.itemAt(j + 1, Type2Type()),
mEntryMinDuration.itemAt(j + 2, Type2Type()),
mEntryMinDuration.itemAt(j + 3, Type2Type()),
mEntryStallDuration.itemAt(j + 3, Type2Type()));
break;
mFrameHandler->setOperationMode((uint32_t)requestedConfiguration.v3_4.operationMode);
std::string const streamName = "Meta:App:Control";
auto pStreamInfo = createMetaStreamInfo(streamName.c_str(), streamId);
mFrameHandler->addConfigStream(pStreamInfo);
rStreams.vMetaStreams.add(streamId, pStreamInfo);
}
sp pStreamInfo = mFrameHandler->getConfigImageStream(streamId);
mFrameHandler->addConfigStream(pStreamInfo.get(), false/*keepBufferCache*/);
//physical settings
String8 const streamName = String8::format("Meta:App:Physical_%s", ((std::string)srcStream.physicalCameraId).c_str());
StreamId_T const streamId = eSTREAMID_BEGIN_OF_PHYSIC_ID + (int64_t)pcId;
auto pMetaStreamInfo = createMetaStreamInfo(streamName.c_str(), streamId, pcId);
mFrameHandler->addConfigStream(pMetaStreamInfo);
rStreams.vMetaStreams_physical.add(pcId, pMetaStreamInfo);
}
}
}
vendor/mediatek/proprietary/hardware/mtkcam3/main/hal/device/3.x/app/AppStreamMgr.FrameHandler.cpp
这块有一些具体的函数就不继续罗列了
图略
2、log分析
08-26 11:30:38.599694 4145 4164 D mtkcam-dev3: [0-session::onConfigureStreamsLocked] +
08-26 11:30:38.662202 4145 4164 D mtkcam-dev3: [0-session::onConfigureStreamsLocked] -
08-26 11:30:38.602389 4145 4164 D mtkcam-AppStreamMgr: [beginConfigureStreams] StreamConfiguration=
{.v3_4 = {.streams = [3]{
{.v3_2 ={.id = 0, .streamType = OUTPUT, .width = 1920, .height = 1080, .format = IMPLEMENTATION_DEFINED,
.usage = CPU_READ_NEVER | CPU_WRITE_NEVER | GPU_TEXTURE (0x100),
.dataSpace = UNKNOWN | STANDARD_UNSPECIFIED | TRANSFER_UNSPECIFIED | RANGE_UNSPECIFIED (0), .rotation = ROTATION_0}, .physicalCameraId = "", .bufferSize = 0},
{.v3_2 = {.id = 1, .streamType = OUTPUT, .width = 4096, .height = 2304, .format = BLOB,
.usage = CPU_READ_NEVER | CPU_READ_RARELY | CPU_READ_OFTEN | CPU_WRITE_NEVER (0x3),
.dataSpace = UNKNOWN | STANDARD_UNSPECIFIED | STANDARD_BT601_625 | TRANSFER_UNSPECIFIED | TRANSFER_LINEAR | TRANSFER_SRGB | TRANSFER_SMPTE_170M | RANGE_UNSPECIFIED | RANGE_FULL | V0_JFIF (0x8c20000),
.rotation = ROTATION_0}, .physicalCameraId = "", .bufferSize = 14227317},
{.v3_2 = {.id = 2, .streamType = OUTPUT, .width = 176, .height = 144, .format = YCBCR_420_888,
.usage = CPU_READ_NEVER | CPU_READ_RARELY | CPU_READ_OFTEN | CPU_WRITE_NEVER (0x3),
(mva=0x0/sec=0/prot=0/alpha=1:0xff/blend=0002/dim=0/fmt=4868/range=1(20000000)/x=0 y=65 w=1080 h=1 s=1088,66 -> x=0 y=0 w=1080 h=1/layer_type=0 ext_layer=-1 ds=0 fbdc=0) !
08-26 11:30:38.602796 4145 4164 W mtkcam-AppStreamMgr: [0-ConfigHandler::checkStream] framework stream dataspace:0x08c20000(V0_JFIF|STANDARD_BT601_625|TRANSFER_SMPTE_170M|RANGE_FULL)
{.v3_2 = {.id = 1, .streamType = OUTPUT, .width = 4096, .height = 2304, .format = BLOB,
.usage = CPU_READ_NEVER | CPU_READ_RARELY | CPU_READ_OFTEN | CPU_WRITE_NEVER (0x3),
.dataSpace = UNKNOWN | STANDARD_UNSPECIFIED | STANDARD_BT601_625 | TRANSFER_UNSPECIFIED | TRANSFER_LINEAR | TRANSFER_SRGB | TRANSFER_SMPTE_170M | RANGE_UNSPECIFIED | RANGE_FULL | V0_JFIF (0x8c20000),
.rotation = ROTATION_0}, .physicalCameraId = "", .bufferSize = 14227317}
08-26 11:30:38.602905 4145 4164 W mtkcam-AppStreamMgr: [0-ConfigHandler::checkStream] framework stream dataspace:0x08c20000(V0_JFIF|STANDARD_BT601_625|TRANSFER_SMPTE_170M|RANGE_FULL)
{.v3_2 = {.id = 2, .streamType = OUTPUT, .width = 176, .height = 144, .format = YCBCR_420_888,
.usage = CPU_READ_NEVER | CPU_READ_RARELY | CPU_READ_OFTEN | CPU_WRITE_NEVER (0x3),
.dataSpace = UNKNOWN | STANDARD_UNSPECIFIED | STANDARD_BT601_625 | TRANSFER_UNSPECIFIED | TRANSFER_LINEAR | TRANSFER_SRGB | TRANSFER_SMPTE_170M | RANGE_UNSPECIFIED | RANGE_FULL | V0_JFIF (0x8c20000),
.rotation = ROTATION_0}, .physicalCameraId = "", .bufferSize = 0}
08-26 11:30:38.603083 4145 4164 I mtkcam-AppStreamMgr: [0-FrameHandler::setOperationMode] operationMode change: 0xffffffff -> 0
08-26 11:30:38.608006 4145 4164 I mtkcam-AppStreamMgr: [0-ConfigHandler::operator()] [addFrameDuration] format:34 size:1920x1080 min_duration:33333333, stall_duration:0
08-26 11:30:38.608019 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::beginConfigureStreams] Stream: id:0 streamType:0 1920x1080 format:0x22 usage:0x100 dataSpace:0x0 rotation:0
08-26 11:30:38.608033 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::createImageStreamInfo] isSecureCameraDevice=0 usageForHal=0x0x20033 usageForHalClient=0x0x3
08-26 11:30:38.608047 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::createImageStreamInfo] grallocRequest.format=33, grallocRequest.usage = 0x20033
08-26 11:30:38.608058 4145 4164 I mtkcam-AppStreamMgr: [0-ConfigHandler::createImageStreamInfo] BLOB with widthInPixels(14227317), heightInPixels(1), bufferSize(14227317)
08-26 11:30:38.609436 4145 4164 I mtkcam-AppStreamMgr: stream id len : 0
08-26 11:30:38.609452 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::createImageStreamInfo] rStream.v_32.usage(0x3)
08-26 11:30:38.609452 4145 4164 D mtkcam-AppStreamMgr: rStream-Info(sid=0x1, format=0x21, usage=0x3, StreamType::OUTPUT=0x0, streamType=0x0)
08-26 11:30:38.609452 4145 4164 D mtkcam-AppStreamMgr: grallocStaticInfo(format=0x21)
08-26 11:30:38.609452 4145 4164 D mtkcam-AppStreamMgr: HalStream-info(producerUsage= 0x20033, consumerUsage= 0, overrideFormat=0x21 )
08-26 11:30:38.609452 4145 4164 D mtkcam-AppStreamMgr: Blob-info(imgFmt=0x2300, allocImgFmt=0x21, allocBufPlanes(size=1, sizeInBytes=14227317, rowStrideInBytes=14227317)
08-26 11:30:38.609452 4145 4164 D mtkcam-AppStreamMgr: Misc-info(usageForAllocator=0x20033, NSCam::BufferUsage::PROT_CAMERA_BIDIRECTIONAL=0x64000) NSCam::BufferUsage::E2E_HDR=0x50030000)
08-26 11:30:38.609452 4145 4164 D mtkcam-AppStreamMgr: creationInfo(secureInfo=0x0)
08-26 11:30:38.609494 4145 4164 I mtkcam-AppStreamMgr: [0-ConfigHandler::operator()] [addFrameDuration] format:33 size:4096x2304 min_duration:66666666, stall_duration:33333333
08-26 11:30:38.609508 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::beginConfigureStreams] Stream: id:1 streamType:0 4096x2304 format:0x21 usage:0x3 dataSpace:0x8c20000 rotation:0
08-26 11:30:38.609524 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::createImageStreamInfo] isSecureCameraDevice=0 usageForHal=0x0x20033 usageForHalClient=0x0x3
08-26 11:30:38.609539 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::createImageStreamInfo] grallocRequest.format=35, grallocRequest.usage = 0x20033
08-26 11:30:38.610509 4145 4164 I mtkcam-AppStreamMgr: [0-ConfigHandler::operator()] [addFrameDuration] format:35 size:176x144 min_duration:33333333, stall_duration:0
08-26 11:30:38.610527 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::beginConfigureStreams] Stream: id:2 streamType:0 176x144 format:0x23 usage:0x3 dataSpace:0x8c20000 rotation:0
08-26 11:30:38.610540 4145 4164 D mtkcam-AppStreamMgr: [0-ConfigHandler::beginConfigureStreams] operationmode 0 videoWidth is 4096 videoWidth1 is 1920
08-26 11:30:38.610608 4145 4164 D mtkcam-dev3: [0-session::onConfigureStreamsLocked] pParams.vPhysicCameras(0)
08-26 11:30:38.610618 4145 4164 D mtkcam-dev3: [0-session::onConfigureStreamsLocked] pImageStreamBufferProvider 0x0
08-26 11:30:38.662202 4145 4164 D mtkcam-dev3: [0-session::onConfigureStreamsLocked] -
08-26 11:30:38.662271 4145 4164 I mtkcam-dev3: [0-session::tryRunCommandLocked] Run command onConfigureStreamsLocked -
这块是设置上层下发的流的格式。
2.1 config stage log
2.1.1 PipelineModelSessionFactory log
log具体含义，看《MTK_camera_pipeline_framework.pdf》
02-04 11:25:35.639 921 921 D mtkcam-PipelineModelSession-Factory: [convertToUserConfiguration] APP set init frame : 1, if not be zero, force it to be 4
02-04 11:25:35.641 921 921 I mtkcam-PipelineModelSession-Factory: [convertToUserConfiguration] force 3rd flow
02-04 11:25:35.641 921 921 I mtkcam-PipelineModelSession-Factory: [convertToUserConfiguration] dual cam device(s:0,path:1) forceFeatureMode(1) pack jpeg(0) physical(0) s(16) c(1)
02-04 11:25:33.979 921 11876 D mtkcam-PipelineModelSession-Factory: [parseAppStreamInfo] ispTuningDataEnable(0) StreamId(0) ConsumerUsage(2304) size(1440,1080) yuv_isp_tuning_data_size(1280,720) raw_isp_tuning_data_size(2560,1920)
02-04 11:25:33.979 921 11876 D mtkcam-PipelineModelSession-Factory: [parseAppStreamInfo] ispTuningDataEnable(0) StreamId(0x2) ConsumerUsage(3) size(1440,1080) yuv_isp_tuning_data_size(1280,720) raw_isp_tuning_data_size(2560,1920)
02-04 11:25:35.643 921 921 I mtkcam-PipelineModelSession-Factory: [decidePipelineModelSession] Vsdof
StreamId： pStreamInfo->getStreamId()
size(1440,1080) ：StreamSize
yuv_isp_tuning_data_size(1280,720) :Tuning data size
raw_isp_tuning_data_size(2560,1920) :Tuning data size
Vsdof : PipelineModelSession类型为 Zoom
原文链接：https://blog.csdn.net/weixin_38328785/article/details/108581219
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