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/*
* Copyright (C) 2011 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.
*/
/*
* Contains implementation of a class NV21JpegCompressor that encapsulates a
* converter between NV21, and JPEG formats.
*/
#define LOG_NDEBUG 0
#define LOG_TAG "EmulatedCamera_JPEG"
#include <cutils/log.h>
#include <assert.h>
#include <dlfcn.h>
#include "JpegCompressor.h"
namespace android {
void* NV21JpegCompressor::mDl = NULL;
static void* getSymbol(void* dl, const char* signature) {
void* res = dlsym(dl, signature);
assert (res != NULL);
return res;
}
typedef void (*InitFunc)(JpegStub* stub, int* strides);
typedef void (*CleanupFunc)(JpegStub* stub);
typedef int (*CompressFunc)(JpegStub* stub, const void* image,
int width, int height, int quality);
typedef void (*GetCompressedImageFunc)(JpegStub* stub, void* buff);
typedef size_t (*GetCompressedSizeFunc)(JpegStub* stub);
NV21JpegCompressor::NV21JpegCompressor()
{
const char dlName[] = "/system/lib/hw/camera.goldfish.jpeg.so";
if (mDl == NULL) {
mDl = dlopen(dlName, RTLD_NOW);
}
assert(mDl != NULL);
InitFunc f = (InitFunc)getSymbol(mDl, "JpegStub_init");
(*f)(&mStub, mStrides);
}
NV21JpegCompressor::~NV21JpegCompressor()
{
CleanupFunc f = (CleanupFunc)getSymbol(mDl, "JpegStub_cleanup");
(*f)(&mStub);
}
/****************************************************************************
* Public API
***************************************************************************/
status_t NV21JpegCompressor::compressRawImage(const void* image,
int width,
int height,
int quality)
{
mStrides[0] = width;
mStrides[1] = width;
CompressFunc f = (CompressFunc)getSymbol(mDl, "JpegStub_compress");
return (status_t)(*f)(&mStub, image, width, height, quality);
}
size_t NV21JpegCompressor::getCompressedSize()
{
GetCompressedSizeFunc f = (GetCompressedSizeFunc)getSymbol(mDl,
"JpegStub_getCompressedSize");
return (*f)(&mStub);
}
void NV21JpegCompressor::getCompressedImage(void* buff)
{
GetCompressedImageFunc f = (GetCompressedImageFunc)getSymbol(mDl,
"JpegStub_getCompressedImage");
(*f)(&mStub, buff);
}
}; /* namespace android */
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