Move matrix from VideoFrame to TextureBuffer.

webrtc/sdk/android/src/jni/videoframe_jni.cc

+/*
+ *  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 "libyuv/scale.h"
+
+#include "webrtc/rtc_base/checks.h"
+
+namespace webrtc_jni {
+
+extern "C" JNIEXPORT void JNICALL
+Java_org_webrtc_VideoFrame_nativeCropAndScaleI420(JNIEnv* jni,
+                                                  jclass,
+                                                  jobject j_src_y,
+                                                  jint src_stride_y,
+                                                  jobject j_src_u,
+                                                  jint src_stride_u,
+                                                  jobject j_src_v,
+                                                  jint src_stride_v,
+                                                  jint crop_x,
+                                                  jint crop_y,
+                                                  jint crop_width,
+                                                  jint crop_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,
+                                                  jint scale_width,
+                                                  jint scale_height) {
+  uint8_t const* src_y =
+      static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_y));
+  uint8_t const* src_u =
+      static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_u));
+  uint8_t const* src_v =
+      static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_src_v));
+  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));
+
+  // 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 webrtc_jni