blob: a98462fa7a1aa92102b6978c53e04a1fff6a38e0 [file] [log] [blame]
/*
* Copyright 2015 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 "sdk/android/generated_video_jni/jni/JavaI420Buffer_jni.h"
#include "third_party/libyuv/include/libyuv/scale.h"
namespace webrtc {
namespace jni {
static void JNI_JavaI420Buffer_CropAndScaleI420(
JNIEnv* jni,
const JavaParamRef<jclass>&,
const JavaParamRef<jobject>& j_src_y,
jint src_stride_y,
const JavaParamRef<jobject>& j_src_u,
jint src_stride_u,
const JavaParamRef<jobject>& j_src_v,
jint src_stride_v,
jint crop_x,
jint crop_y,
jint crop_width,
jint crop_height,
const JavaParamRef<jobject>& j_dst_y,
jint dst_stride_y,
const JavaParamRef<jobject>& j_dst_u,
jint dst_stride_u,
const JavaParamRef<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.obj()));
uint8_t const* src_u =
static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_u.obj()));
uint8_t const* src_v =
static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_v.obj()));
uint8_t* dst_y =
static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_y.obj()));
uint8_t* dst_u =
static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_u.obj()));
uint8_t* dst_v =
static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_v.obj()));
// 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