| /* |
| * Copyright (C) 2014 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. |
| */ |
| |
| #include <jni.h> |
| #include <math.h> |
| #include <android/bitmap.h> |
| |
| #include "jpegutil.h" |
| |
| /** |
| * @param env the JNI environment |
| * @param yBuf the buffer containing the Y component of the image |
| * @param yPStride the stride between adjacent pixels in the same row in yBuf |
| * @param yRStride the stride between adjacent rows in yBuf |
| * @param cbBuf the buffer containing the Cb component of the image |
| * @param cbPStride the stride between adjacent pixels in the same row in cbBuf |
| * @param cbRStride the stride between adjacent rows in cbBuf |
| * @param crBuf the buffer containing the Cr component of the image |
| * @param crPStride the stride between adjacent pixels in the same row in crBuf |
| * @param crRStride the stride between adjacent rows in crBuf |
| */ |
| extern "C" JNIEXPORT jint JNICALL |
| Java_com_android_camera_util_JpegUtilNative_compressJpegFromYUV420pNative( |
| JNIEnv* env, jclass clazz, jint width, jint height, jobject yBuf, |
| jint yPStride, jint yRStride, jobject cbBuf, jint cbPStride, |
| jint cbRStride, jobject crBuf, jint crPStride, jint crRStride, |
| jobject outBuf, jint outBufCapacity, jint quality) { |
| jbyte* y = (jbyte*)env->GetDirectBufferAddress(yBuf); |
| jbyte* cb = (jbyte*)env->GetDirectBufferAddress(cbBuf); |
| jbyte* cr = (jbyte*)env->GetDirectBufferAddress(crBuf); |
| jbyte* out = (jbyte*)env->GetDirectBufferAddress(outBuf); |
| |
| jpegutil::Plane yP(width, height, width, height, (unsigned char*)y, yPStride, |
| yRStride); |
| jpegutil::Plane cbP(width, height, width / 2, height / 2, (unsigned char*)cb, |
| cbPStride, cbRStride); |
| jpegutil::Plane crP(width, height, width / 2, height / 2, (unsigned char*)cr, |
| crPStride, crRStride); |
| |
| auto flush = [](size_t numBytes) { |
| // do nothing |
| }; |
| |
| return jpegutil::compress(yP, cbP, crP, (unsigned char*)out, outBufCapacity, |
| flush, quality); |
| } |