1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_NDEBUG 0 18 #define LOG_TAG "EmulatedCamera_JPEGStub" 19 #include <errno.h> 20 #include <cutils/log.h> 21 #include <YuvToJpegEncoder.h> 22 23 #include "JpegStub.h" 24 25 26 extern "C" void JpegStub_init(JpegStub* stub, int* strides) { 27 stub->mInternalEncoder = (void*) new Yuv420SpToJpegEncoder(strides); 28 stub->mInternalStream = (void*)new SkDynamicMemoryWStream(); 29 } 30 31 extern "C" void JpegStub_cleanup(JpegStub* stub) { 32 delete((Yuv420SpToJpegEncoder*)stub->mInternalEncoder); 33 delete((SkDynamicMemoryWStream*)stub->mInternalStream); 34 } 35 36 extern "C" int JpegStub_compress(JpegStub* stub, const void* image, 37 int width, int height, int quality) 38 { 39 void* pY = const_cast<void*>(image); 40 int offsets[2]; 41 offsets[0] = 0; 42 offsets[1] = width * height; 43 44 Yuv420SpToJpegEncoder* encoder = 45 (Yuv420SpToJpegEncoder*)stub->mInternalEncoder; 46 SkDynamicMemoryWStream* stream = 47 (SkDynamicMemoryWStream*)stub->mInternalStream; 48 if (encoder->encode(stream, pY, width, height, offsets, quality)) { 49 ALOGV("%s: Compressed JPEG: %d[%dx%d] -> %zu bytes", 50 __FUNCTION__, (width * height * 12) / 8, 51 width, height, stream->getOffset()); 52 return 0; 53 } else { 54 ALOGE("%s: JPEG compression failed", __FUNCTION__); 55 return errno ? errno: EINVAL; 56 } 57 } 58 59 extern "C" void JpegStub_getCompressedImage(JpegStub* stub, void* buff) { 60 SkDynamicMemoryWStream* stream = 61 (SkDynamicMemoryWStream*)stub->mInternalStream; 62 stream->copyTo(buff); 63 } 64 65 extern "C" size_t JpegStub_getCompressedSize(JpegStub* stub) { 66 SkDynamicMemoryWStream* stream = 67 (SkDynamicMemoryWStream*)stub->mInternalStream; 68 return stream->getOffset(); 69 } 70
