blob: ad43698648e71782c7a883cd75306f24570e9dae [file] [log] [blame]
* 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 <vector>
#include "common_video/libyuv/include/webrtc_libyuv.h"
#include "rtc_base/checks.h"
#include "sdk/android/generated_video_jni/NV21Buffer_jni.h"
#include "third_party/libyuv/include/libyuv/convert.h"
#include "third_party/libyuv/include/libyuv/scale.h"
namespace webrtc {
namespace jni {
static void JNI_NV21Buffer_CropAndScale(JNIEnv* jni,
jint crop_x,
jint crop_y,
jint crop_width,
jint crop_height,
jint scale_width,
jint scale_height,
const JavaParamRef<jbyteArray>& j_src,
jint src_width,
jint src_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) {
const int src_stride_y = src_width;
const int src_stride_uv = src_width;
const int crop_chroma_x = crop_x / 2;
const int crop_chroma_y = crop_y / 2;
jboolean was_copy;
jbyte* src_bytes = jni->GetByteArrayElements(j_src.obj(), &was_copy);
uint8_t const* src_y = reinterpret_cast<uint8_t const*>(src_bytes);
uint8_t const* src_uv = src_y + src_height * src_stride_y;
uint8_t* dst_y =
uint8_t* dst_u =
uint8_t* dst_v =
// Crop using pointer arithmetic.
src_y += crop_x + crop_y * src_stride_y;
src_uv += 2 * crop_chroma_x + crop_chroma_y * src_stride_uv;
NV12ToI420Scaler scaler;
// U- and V-planes are swapped because this is NV21 not NV12.
scaler.NV12ToI420Scale(src_y, src_stride_y, src_uv, src_stride_uv, crop_width,
crop_height, dst_y, dst_stride_y, dst_v, dst_stride_v,
dst_u, dst_stride_u, scale_width, scale_height);
jni->ReleaseByteArrayElements(j_src.obj(), src_bytes, JNI_ABORT);
} // namespace jni
} // namespace webrtc