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/*
* Copyright (C) 2019 Samsung Electronics Co.,LTD.
*
* 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.
*/
#ifndef __HARDWARE_EXYNOS_LIBSCALERFORJPEG_H__
#define __HARDWARE_EXYNOS_LIBSCALERFORJPEG_H__
#include <linux/videodev2.h>
#include <functional>
#include "ThumbnailScaler.h"
class LibScalerForJpeg : public ThumbnailScaler {
public:
LibScalerForJpeg() {}
~LibScalerForJpeg() {}
bool SetSrcImage(unsigned int width, unsigned int height, unsigned int v4l2_format) {
return mSrcImage.set(width, height, v4l2_format);
}
bool SetDstImage(unsigned int width, unsigned int height, unsigned int v4l2_format) {
return mDstImage.set(width, height, v4l2_format);
}
bool RunStream(int srcBuf[SCALER_MAX_PLANES], int srcLen[SCALER_MAX_PLANES], int dstBuf,
size_t dstLen);
bool RunStream(char *srcBuf[SCALER_MAX_PLANES], int srcLen[SCALER_MAX_PLANES], int dstBuf,
size_t dstLen);
bool available() { return mDevice.mFd >= 0; }
private:
struct Device {
int mFd;
Device();
~Device();
bool requestBuffers(unsigned int buftype, unsigned int memtype, unsigned int count);
bool setFormat(unsigned int buftype, unsigned int format, unsigned int width,
unsigned int height, unsigned int planelen[SCALER_MAX_PLANES]);
bool streamOn(unsigned int buftype);
bool streamOff(unsigned int buftype);
bool queueBuffer(unsigned int buftype, std::function<void(v4l2_buffer &)> bufferFiller);
bool queueBuffer(unsigned int buftype, int buf[SCALER_MAX_PLANES],
unsigned int len[SCALER_MAX_PLANES]);
bool queueBuffer(unsigned int buftype, char *buf[SCALER_MAX_PLANES],
unsigned int len[SCALER_MAX_PLANES]);
bool queueBuffer(unsigned int buftype, int buf, unsigned int len[SCALER_MAX_PLANES]);
bool dequeueBuffer(unsigned int buftype, unsigned int memtype);
};
struct Image {
Device &mDevice;
unsigned int width;
unsigned int height;
unsigned int format;
unsigned int memoryType = 0;
const unsigned int bufferType;
unsigned int planeLen[SCALER_MAX_PLANES];
Image(Device &dev, unsigned int w, unsigned int h, unsigned int f, unsigned int buftype)
: mDevice(dev), width(w), height(h), format(f), bufferType(buftype) {}
bool set(unsigned int width, unsigned int height, unsigned int format);
bool begin(unsigned int memtype);
bool cancelBuffer();
template <class tBuf>
bool queueBuffer(tBuf buf) {
return mDevice.queueBuffer(bufferType, buf, planeLen);
}
bool dequeueBuffer() { return mDevice.dequeueBuffer(bufferType, memoryType); }
bool same(unsigned int w, unsigned int h, unsigned int f) {
return width == w && height == h && format == f;
}
};
template <class T>
bool queue(T srcBuf[SCALER_MAX_PLANES], int dstBuf) {
if (!mSrcImage.queueBuffer(srcBuf)) return false;
if (!mDstImage.queueBuffer(dstBuf)) {
mSrcImage.cancelBuffer();
return false;
}
if (!mSrcImage.dequeueBuffer() || !mDstImage.dequeueBuffer()) {
mSrcImage.cancelBuffer();
mDstImage.cancelBuffer();
return false;
}
return true;
}
Device mDevice;
Image mSrcImage{mDevice, 0, 0, V4L2_PIX_FMT_YUYV, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE};
Image mDstImage{mDevice, 0, 0, V4L2_PIX_FMT_YUYV, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE};
};
#endif //__HARDWARE_EXYNOS_LIBSCALERFORJPEG_H__
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