Fix and optimize input buffer filling in HardwareVideoEncoder.

Previously input buffers would be filled incorrectly for sparsely
packed buffers where stride is not equal to the plane width.

Bug: webrtc:8478
Change-Id: I080fa3c354a27982bb996be8c1e41b103384e4bc
Reviewed-on: https://webrtc-review.googlesource.com/17321
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20550}

sdk/android/src/jni/yuvhelper.cc

@@ -0,0 +1,84 @@
+/*
+ *  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 "sdk/android/src/jni/jni_helpers.h"
+#include "third_party/libyuv/include/libyuv/convert.h"
+
+namespace webrtc {
+namespace jni {
+
+JNI_FUNCTION_DECLARATION(void,
+                         YuvHelper_I420Copy,
+                         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,
+                         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 width,
+                         jint height) {
+  const uint8_t* src_y =
+      static_cast<const uint8_t*>(jni->GetDirectBufferAddress(j_src_y));
+  const uint8_t* src_u =
+      static_cast<const uint8_t*>(jni->GetDirectBufferAddress(j_src_u));
+  const uint8_t* src_v =
+      static_cast<const 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));
+
+  libyuv::I420Copy(src_y, src_stride_y, src_u, src_stride_u, src_v,
+                   src_stride_v, dst_y, dst_stride_y, dst_u, dst_stride_u,
+                   dst_v, dst_stride_v, width, height);
+}
+
+JNI_FUNCTION_DECLARATION(void,
+                         YuvHelper_I420ToNV12,
+                         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,
+                         jobject j_dst_y,
+                         jint dst_stride_y,
+                         jobject j_dst_uv,
+                         jint dst_stride_uv,
+                         jint width,
+                         jint height) {
+  const uint8_t* src_y =
+      static_cast<const uint8_t*>(jni->GetDirectBufferAddress(j_src_y));
+  const uint8_t* src_u =
+      static_cast<const uint8_t*>(jni->GetDirectBufferAddress(j_src_u));
+  const uint8_t* src_v =
+      static_cast<const uint8_t*>(jni->GetDirectBufferAddress(j_src_v));
+  uint8_t* dst_y = static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_y));
+  uint8_t* dst_uv =
+      static_cast<uint8_t*>(jni->GetDirectBufferAddress(j_dst_uv));
+
+  libyuv::I420ToNV12(src_y, src_stride_y, src_u, src_stride_u, src_v,
+                     src_stride_v, dst_y, dst_stride_y, dst_uv, dst_stride_uv,
+                     width, height);
+}
+
+}  // namespace jni
+}  // namespace webrtc