| /* |
| * 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); |
| } |
| |
| /** |
| * Copies the Image.Plane specified by planeBuf, pStride, and rStride to the |
| * Bitmap. |
| * |
| * @param env the JNI environment |
| * @param clazz the java class |
| * @param width the width of the output image |
| * @param height the height of the output image |
| * @param planeBuf the native ByteBuffer containing the image plane data |
| * @param pStride the stride between adjacent pixels in the same row of planeBuf |
| * @param rStride the stride between adjacent rows in planeBuf |
| * @param rot90 the multiple of 90 degrees to rotate, one of {0, 1, 2, 3}. |
| */ |
| extern "C" JNIEXPORT void JNICALL |
| Java_com_android_camera_util_JpegUtilNative_copyImagePlaneToBitmap( |
| JNIEnv* env, jclass clazz, jint width, jint height, jobject planeBuf, |
| jint pStride, jint rStride, jobject outBitmap, jint rot90) { |
| jbyte* src = (jbyte*)env->GetDirectBufferAddress(planeBuf); |
| |
| char* dst = 0; |
| AndroidBitmap_lockPixels(env, outBitmap, (void**) &dst); |
| |
| if (rot90 == 0) { |
| // No rotation |
| for (int y = 0; y < height; y++) { |
| char* srcPtr = reinterpret_cast<char*>(&src[y * rStride]); |
| char* dstPtr = &dst[y * width]; |
| for (int x = 0; x < width; x++) { |
| *dstPtr = *srcPtr; |
| srcPtr += pStride; |
| dstPtr++; |
| } |
| } |
| } else if (rot90 == 1) { |
| // 90-degree rotation |
| for (int y = 0; y < height; y++) { |
| for (int x = 0; x < width; x++) { |
| int srcX = height - 1 - y; |
| int srcY = x; |
| dst[y * width + x] = src[srcX * pStride + rStride * srcY]; |
| } |
| } |
| } else if (rot90 == 2) { |
| // 180-degree rotation |
| for (int y = 0; y < height; y++) { |
| for (int x = 0; x < width; x++) { |
| int srcX = width - 1 - x; |
| int srcY = height - 1 - y; |
| dst[y * width + x] = src[srcX * pStride + rStride * srcY]; |
| } |
| } |
| } else if (rot90 == 3) { |
| // 270-degree rotation |
| for (int y = 0; y < height; y++) { |
| for (int x = 0; x < width; x++) { |
| int srcX = y; |
| int srcY = width - 1 - x; |
| dst[y * width + x] = src[srcX * pStride + rStride * srcY]; |
| } |
| } |
| } |
| |
| AndroidBitmap_unlockPixels(env, outBitmap); |
| } |