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