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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.
*/
/**
* This class simulates a hardware JPEG compressor. It receives image buffers
* in RGBA_8888 format, processes them in a worker thread, and then pushes them
* out to their destination stream.
*/
#ifndef HW_EMULATOR_CAMERA2_JPEG_H
#define HW_EMULATOR_CAMERA2_JPEG_H
#include "utils/Thread.h"
#include "utils/Mutex.h"
#include "utils/Timers.h"
#include "Base.h"
#include <stdio.h>
extern "C" {
#include <jpeglib.h>
}
namespace android {
class EmulatedFakeCamera2;
class JpegCompressor: private Thread, public virtual RefBase {
public:
JpegCompressor(EmulatedFakeCamera2 *parent);
~JpegCompressor();
// Start compressing COMPRESSED format buffers; JpegCompressor takes
// ownership of the Buffers vector.
status_t start(Buffers *buffers,
nsecs_t captureTime);
status_t cancel();
bool isBusy();
bool isStreamInUse(uint32_t id);
bool waitForDone(nsecs_t timeout);
// TODO: Measure this
static const size_t kMaxJpegSize = 300000;
private:
Mutex mBusyMutex;
bool mIsBusy;
Condition mDone;
Mutex mMutex;
EmulatedFakeCamera2 *mParent;
Buffers *mBuffers;
nsecs_t mCaptureTime;
StreamBuffer mJpegBuffer, mAuxBuffer;
bool mFoundJpeg, mFoundAux;
jpeg_compress_struct mCInfo;
struct JpegError : public jpeg_error_mgr {
JpegCompressor *parent;
};
j_common_ptr mJpegErrorInfo;
struct JpegDestination : public jpeg_destination_mgr {
JpegCompressor *parent;
};
static void jpegErrorHandler(j_common_ptr cinfo);
static void jpegInitDestination(j_compress_ptr cinfo);
static boolean jpegEmptyOutputBuffer(j_compress_ptr cinfo);
static void jpegTermDestination(j_compress_ptr cinfo);
bool checkError(const char *msg);
void cleanUp();
/**
* Inherited Thread virtual overrides
*/
private:
virtual status_t readyToRun();
virtual bool threadLoop();
};
} // namespace android
#endif