blob: 23b1791ef98d0b2a68b912ee31acd9669a8fb94f [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 "third_party/libyuv/include/libyuv/convert.h"
#include "third_party/libyuv/include/libyuv/scale.h"
#include "rtc_base/checks.h"
#include "sdk/android/generated_video_jni/jni/NV12Buffer_jni.h"
namespace webrtc {
namespace jni {
static void JNI_NV12Buffer_CropAndScale(JNIEnv* jni,
const JavaParamRef<jclass>&,
jint crop_x,
jint crop_y,
jint crop_width,
jint crop_height,
jint scale_width,
jint scale_height,
const JavaParamRef<jobject>& j_src,
jint src_width,
jint src_height,
jint src_stride,
jint src_slice_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_stride;
const int src_stride_uv = src_stride;
const int crop_chroma_x = crop_x / 2;
const int crop_chroma_y = crop_y / 2;
const int crop_chroma_width = (crop_width + 1) / 2;
const int crop_chroma_height = (crop_height + 1) / 2;
const int tmp_stride_u = crop_chroma_width;
const int tmp_stride_v = crop_chroma_width;
const int tmp_size = crop_chroma_height * (tmp_stride_u + tmp_stride_v);
uint8_t const* src_y =
static_cast<uint8_t const*>(jni->GetDirectBufferAddress(j_src.obj()));
uint8_t const* src_uv = src_y + src_slice_height * src_stride_y;
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()));
// 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;
std::vector<uint8_t> tmp_buffer(tmp_size);
uint8_t* tmp_u = tmp_buffer.data();
uint8_t* tmp_v = tmp_u + crop_chroma_height * tmp_stride_u;
libyuv::SplitUVPlane(src_uv, src_stride_uv, tmp_u, tmp_stride_u, tmp_v,
tmp_stride_v, crop_chroma_width, crop_chroma_height);
libyuv::I420Scale(src_y, src_stride_y, tmp_u, tmp_stride_u, tmp_v,
tmp_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);
}
} // namespace jni
} // namespace webrtc