| /* |
| * Copyright 2017 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include <jni.h> |
| |
| #include "libyuv/scale.h" |
| |
| #include "webrtc/rtc_base/checks.h" |
| |
| namespace webrtc { |
| namespace jni { |
| |
| extern "C" JNIEXPORT void JNICALL |
| Java_org_webrtc_VideoFrame_nativeCropAndScaleI420(JNIEnv* jni, |
| jclass, |
| jobject j_src_y, |
| jint src_stride_y, |
| jobject j_src_u, |
| jint src_stride_u, |
| jobject j_src_v, |
| jint src_stride_v, |
| jint crop_x, |
| jint crop_y, |
| jint crop_width, |
| jint crop_height, |
| jobject j_dst_y, |
| jint dst_stride_y, |
| jobject j_dst_u, |
| jint dst_stride_u, |
| jobject j_dst_v, |
| jint dst_stride_v, |
| jint scale_width, |
| jint scale_height) { |
| uint8_t const* src_y = |
| static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_y)); |
| uint8_t const* src_u = |
| static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_u)); |
| uint8_t const* src_v = |
| static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_v)); |
| uint8_t* dst_y = static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_y)); |
| uint8_t* dst_u = static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_u)); |
| uint8_t* dst_v = static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_v)); |
| |
| // Perform cropping using pointer arithmetic. |
| src_y += crop_x + crop_y * src_stride_y; |
| src_u += crop_x / 2 + crop_y / 2 * src_stride_u; |
| src_v += crop_x / 2 + crop_y / 2 * src_stride_v; |
| |
| bool ret = libyuv::I420Scale( |
| src_y, src_stride_y, src_u, src_stride_u, src_v, src_stride_v, crop_width, |
| crop_height, dst_y, dst_stride_y, dst_u, dst_stride_u, dst_v, |
| dst_stride_v, scale_width, scale_height, libyuv::kFilterBox); |
| RTC_DCHECK_EQ(ret, 0) << "I420Scale failed"; |
| } |
| |
| } // namespace jni |
| } // namespace webrtc |
