blob: 084f5fc2f0d6d569278ef3a92490bfd62ce9753a
| 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 |