1 /*
2 * Copyright 2015 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "sdk/android/generated_video_jni/JavaI420Buffer_jni.h"
12 #include "third_party/libyuv/include/libyuv/scale.h"
13
14 namespace webrtc {
15 namespace jni {
16
JNI_JavaI420Buffer_CropAndScaleI420(JNIEnv * jni,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)17 static void JNI_JavaI420Buffer_CropAndScaleI420(
18 JNIEnv* jni,
19 const JavaParamRef<jobject>& j_src_y,
20 jint src_stride_y,
21 const JavaParamRef<jobject>& j_src_u,
22 jint src_stride_u,
23 const JavaParamRef<jobject>& j_src_v,
24 jint src_stride_v,
25 jint crop_x,
26 jint crop_y,
27 jint crop_width,
28 jint crop_height,
29 const JavaParamRef<jobject>& j_dst_y,
30 jint dst_stride_y,
31 const JavaParamRef<jobject>& j_dst_u,
32 jint dst_stride_u,
33 const JavaParamRef<jobject>& j_dst_v,
34 jint dst_stride_v,
35 jint scale_width,
36 jint scale_height) {
37 uint8_t const* src_y =
38 static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_y.obj()));
39 uint8_t const* src_u =
40 static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_u.obj()));
41 uint8_t const* src_v =
42 static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_v.obj()));
43 uint8_t* dst_y =
44 static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_y.obj()));
45 uint8_t* dst_u =
46 static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_u.obj()));
47 uint8_t* dst_v =
48 static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_v.obj()));
49
50 // Perform cropping using pointer arithmetic.
51 src_y += crop_x + crop_y * src_stride_y;
52 src_u += crop_x / 2 + crop_y / 2 * src_stride_u;
53 src_v += crop_x / 2 + crop_y / 2 * src_stride_v;
54
55 bool ret = libyuv::I420Scale(
56 src_y, src_stride_y, src_u, src_stride_u, src_v, src_stride_v, crop_width,
57 crop_height, dst_y, dst_stride_y, dst_u, dst_stride_u, dst_v,
58 dst_stride_v, scale_width, scale_height, libyuv::kFilterBox);
59 RTC_DCHECK_EQ(ret, 0) << "I420Scale failed";
60 }
61
62 } // namespace jni
63 } // namespace webrtc
64