Index: webrtc/sdk/android/src/jni/nv12buffer_jni.cc |
diff --git a/webrtc/sdk/android/src/jni/nv12buffer_jni.cc b/webrtc/sdk/android/src/jni/nv12buffer_jni.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e0aab9b8a3e9734166916e8060dfc1ee667e88d2 |
--- /dev/null |
+++ b/webrtc/sdk/android/src/jni/nv12buffer_jni.cc |
@@ -0,0 +1,76 @@ |
+/* |
+ * 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 "webrtc/rtc_base/checks.h" |
+ |
+namespace webrtc_jni { |
+ |
+extern "C" JNIEXPORT void JNICALL |
+Java_org_webrtc_NV12Buffer_nativeCropAndScale(JNIEnv* jni, |
+ jclass, |
+ jint crop_x, |
+ jint crop_y, |
+ jint crop_width, |
+ jint crop_height, |
+ jint scale_width, |
+ jint scale_height, |
+ jobject j_src, |
+ jint src_width, |
+ jint src_height, |
+ jint src_stride, |
+ jint src_slice_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) { |
+ 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)); |
+ 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)); |
+ 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)); |
+ |
+ // Crop using pointer arithmetic. |
+ src_y += crop_x + crop_y * src_stride_y; |
+ src_uv += 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 webrtc_jni |