/* * 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 #include #include #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 */