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android: hal: Add Camera3 HAL

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Add libcamera Android Camera HALv3 implementation.

The initial camera HAL implementation supports the LIMITED hardware
level and uses statically defined metadata and camera characteristics.

Add a build option named 'android' and adjust the build system to
selectively compile the Android camera HAL and link it against the
required Android libraries.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
This commit is contained in:
Jacopo Mondi 2019-05-10 17:40:02 +02:00
parent 6bed34da16
commit 667d8ea8fd
13 changed files with 1559 additions and 1 deletions
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71
src/android/camera_device.h Normal file
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* camera_device.h - libcamera Android Camera Device
*/
#ifndef __ANDROID_CAMERA_DEVICE_H__
#define __ANDROID_CAMERA_DEVICE_H__
#include <memory>
#include <hardware/camera3.h>
#include <libcamera/buffer.h>
#include <libcamera/camera.h>
#include <libcamera/object.h>
#include <libcamera/request.h>
#include <libcamera/stream.h>
#include "message.h"
#define METADATA_ASSERT(_r) \
do { \
if (!(_r)) break; \
LOG(HAL, Error) << "Error: " << __func__ << ":" << __LINE__; \
return nullptr; \
} while(0);
class CameraDevice : public libcamera::Object
{
public:
CameraDevice(unsigned int id, std::shared_ptr<libcamera::Camera> &camera);
~CameraDevice();
void message(libcamera::Message *message);
int open();
void close();
void setCallbacks(const camera3_callback_ops_t *callbacks);
camera_metadata_t *getStaticMetadata();
const camera_metadata_t *constructDefaultRequestSettings(int type);
int configureStreams(camera3_stream_configuration_t *stream_list);
int processCaptureRequest(camera3_capture_request_t *request);
void requestComplete(libcamera::Request *request,
const std::map<libcamera::Stream *, libcamera::Buffer *> &buffers);
private:
struct Camera3RequestDescriptor {
Camera3RequestDescriptor(unsigned int frameNumber,
unsigned int numBuffers);
~Camera3RequestDescriptor();
uint32_t frameNumber;
uint32_t numBuffers;
camera3_stream_buffer_t *buffers;
};
void notifyShutter(uint32_t frameNumber, uint64_t timestamp);
void notifyError(uint32_t frameNumber, camera3_stream_t *stream);
camera_metadata_t *getResultMetadata(int frame_number, int64_t timestamp);
bool running_;
std::shared_ptr<libcamera::Camera> camera_;
std::unique_ptr<libcamera::CameraConfiguration> config_;
camera_metadata_t *staticMetadata_;
camera_metadata_t *requestTemplate_;
const camera3_callback_ops_t *callbacks_;
};
#endif /* __ANDROID_CAMERA_DEVICE_H__ */