/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_HARDWARE_CAMERA_DEVICE_V3_4_EXTCAMUTIL_H
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#define ANDROID_HARDWARE_CAMERA_DEVICE_V3_4_EXTCAMUTIL_H
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#include <android/hardware/graphics/mapper/2.0/IMapper.h>
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#include <inttypes.h>
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#include <mutex>
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#include <unordered_set>
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#include <vector>
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#include "tinyxml2.h" // XML parsing
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#include "utils/LightRefBase.h"
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using android::hardware::graphics::mapper::V2_0::IMapper;
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using android::hardware::graphics::mapper::V2_0::YCbCrLayout;
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namespace android {
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namespace hardware {
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namespace camera {
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namespace external {
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namespace common {
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struct Size {
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uint32_t width;
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uint32_t height;
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bool operator==(const Size& other) const {
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return (width == other.width && height == other.height);
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}
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};
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struct SizeHasher {
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size_t operator()(const Size& sz) const {
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size_t result = 1;
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result = 31 * result + sz.width;
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result = 31 * result + sz.height;
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return result;
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}
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};
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struct ExternalCameraConfig {
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static const char* kDefaultCfgPath;
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static ExternalCameraConfig loadFromCfg(const char* cfgPath = kDefaultCfgPath);
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// List of internal V4L2 video nodes external camera HAL must ignore.
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std::unordered_set<std::string> mInternalDevices;
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// Maximal size of a JPEG buffer, in bytes
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uint32_t maxJpegBufSize;
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// Maximum Size that can sustain 30fps streaming
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Size maxVideoSize;
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// Size of v4l2 buffer queue when streaming <= kMaxVideoSize
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uint32_t numVideoBuffers;
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// Size of v4l2 buffer queue when streaming > kMaxVideoSize
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uint32_t numStillBuffers;
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// Indication that the device connected supports depth output
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bool depthEnabled;
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struct FpsLimitation {
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Size size;
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double fpsUpperBound;
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};
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std::vector<FpsLimitation> fpsLimits;
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std::vector<FpsLimitation> depthFpsLimits;
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// Minimum output stream size
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Size minStreamSize;
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// The value of android.sensor.orientation
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int32_t orientation;
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int32_t jpegOrientation;
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private:
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ExternalCameraConfig();
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static bool updateFpsList(tinyxml2::XMLElement* fpsList, std::vector<FpsLimitation>& fpsLimits);
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};
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} // common
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} // external
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namespace device {
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namespace V3_4 {
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namespace implementation {
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struct SupportedV4L2Format {
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uint32_t width;
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uint32_t height;
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uint32_t fourcc;
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// All supported frame rate for this w/h/fourcc combination
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struct FrameRate {
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uint32_t durationNumerator; // frame duration numerator. Ex: 1
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uint32_t durationDenominator; // frame duration denominator. Ex: 30
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double getDouble() const; // FrameRate in double. Ex: 30.0
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};
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std::vector<FrameRate> frameRates;
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};
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// A class provide access to a dequeued V4L2 frame buffer (mostly in MJPG format)
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// Also contains necessary information to enqueue the buffer back to V4L2 buffer queue
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class V4L2Frame : public virtual VirtualLightRefBase {
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public:
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V4L2Frame(uint32_t w, uint32_t h, uint32_t fourcc, int bufIdx, int fd,
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uint32_t dataSize, uint64_t offset);
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~V4L2Frame() override;
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const uint32_t mWidth;
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const uint32_t mHeight;
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const uint32_t mFourcc;
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const int mBufferIndex; // for later enqueue
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int map(uint8_t** data, size_t* dataSize);
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int unmap();
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private:
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std::mutex mLock;
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const int mFd; // used for mmap but doesn't claim ownership
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const size_t mDataSize;
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const uint64_t mOffset; // used for mmap
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uint8_t* mData = nullptr;
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bool mMapped = false;
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};
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// A RAII class representing a CPU allocated YUV frame used as intermeidate buffers
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// when generating output images.
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class AllocatedFrame : public virtual VirtualLightRefBase {
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public:
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AllocatedFrame(uint32_t w, uint32_t h); // TODO: use Size?
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~AllocatedFrame() override;
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const uint32_t mWidth;
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const uint32_t mHeight;
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const uint32_t mFourcc; // Only support YU12 format for now
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int allocate(YCbCrLayout* out = nullptr);
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int getLayout(YCbCrLayout* out);
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int getCroppedLayout(const IMapper::Rect&, YCbCrLayout* out); // return non-zero for bad input
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private:
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std::mutex mLock;
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std::vector<uint8_t> mData;
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};
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enum CroppingType {
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HORIZONTAL = 0,
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VERTICAL = 1
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};
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// Aspect ratio is defined as width/height here and ExternalCameraDevice
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// will guarantee all supported sizes has width >= height (so aspect ratio >= 1.0)
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#define ASPECT_RATIO(sz) (static_cast<float>((sz).width) / (sz).height)
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const float kMaxAspectRatio = std::numeric_limits<float>::max();
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const float kMinAspectRatio = 1.f;
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bool isAspectRatioClose(float ar1, float ar2);
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} // namespace implementation
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} // namespace V3_4
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} // namespace device
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} // namespace camera
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} // namespace hardware
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} // namespace android
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#endif // ANDROID_HARDWARE_CAMERA_DEVICE_V3_4_EXTCAMUTIL_H
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