Added new VideoFrameBuffer methods Data[YUV]() etc.

Eliminate most uses of the old methods.

To continue on this path, once we agree the new methods make sense,
the next step is to rename cricket::VideoFrame::GetVideoFrameBuffer
--> video_frame_buffer, to match the name in webrtc::VideoFrame (if we
think that name is ok?). And then start updating all code to access
planes via the VideoFrameBuffer, and delete corresponding methods in
both cricket::VideoFrame and webrtc::VideoFrame.

BUG=webrtc:5682

Review URL: https://codereview.webrtc.org/1878623002

Cr-Original-Commit-Position: refs/heads/master@{#12407}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 06176e49e276d290209676c832f17d34329d9ecd
diff --git a/common_video/i420_buffer_pool.cc b/common_video/i420_buffer_pool.cc
index d00ab78..c382e93 100644
--- a/common_video/i420_buffer_pool.cc
+++ b/common_video/i420_buffer_pool.cc
@@ -26,19 +26,28 @@
 
   int width() const override { return buffer_->width(); }
   int height() const override { return buffer_->height(); }
-  const uint8_t* data(webrtc::PlaneType type) const override {
-    return buffer_->data(type);
-  }
+  const uint8_t* DataY() const override { return buffer_->DataY(); }
+  const uint8_t* DataU() const override { return buffer_->DataU(); }
+  const uint8_t* DataV() const override { return buffer_->DataV(); }
+
   bool IsMutable() { return HasOneRef(); }
-  uint8_t* MutableData(webrtc::PlaneType type) override {
-    // Make the HasOneRef() check here instead of in |buffer_|, because the pool
-    // also has a reference to |buffer_|.
+  // Make the IsMutable() check here instead of in |buffer_|, because the pool
+  // also has a reference to |buffer_|.
+  uint8_t* MutableDataY() override {
     RTC_DCHECK(IsMutable());
-    return const_cast<uint8_t*>(buffer_->data(type));
+    return const_cast<uint8_t*>(buffer_->DataY());
   }
-  int stride(webrtc::PlaneType type) const override {
-    return buffer_->stride(type);
+  uint8_t* MutableDataU() override {
+    RTC_DCHECK(IsMutable());
+    return const_cast<uint8_t*>(buffer_->DataU());
   }
+  uint8_t* MutableDataV() override {
+    RTC_DCHECK(IsMutable());
+    return const_cast<uint8_t*>(buffer_->DataV());
+  }
+  int StrideY() const override { return buffer_->StrideY(); }
+  int StrideU() const override { return buffer_->StrideU(); }
+  int StrideV() const override { return buffer_->StrideV(); }
   void* native_handle() const override { return nullptr; }
 
   rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override {
diff --git a/common_video/i420_buffer_pool_unittest.cc b/common_video/i420_buffer_pool_unittest.cc
index 273b72d..2110066 100644
--- a/common_video/i420_buffer_pool_unittest.cc
+++ b/common_video/i420_buffer_pool_unittest.cc
@@ -21,16 +21,16 @@
   EXPECT_EQ(16, buffer->width());
   EXPECT_EQ(16, buffer->height());
   // Extract non-refcounted pointers for testing.
-  const uint8_t* y_ptr = buffer->data(kYPlane);
-  const uint8_t* u_ptr = buffer->data(kUPlane);
-  const uint8_t* v_ptr = buffer->data(kVPlane);
+  const uint8_t* y_ptr = buffer->DataY();
+  const uint8_t* u_ptr = buffer->DataU();
+  const uint8_t* v_ptr = buffer->DataV();
   // Release buffer so that it is returned to the pool.
   buffer = nullptr;
   // Check that the memory is resued.
   buffer = pool.CreateBuffer(16, 16);
-  EXPECT_EQ(y_ptr, buffer->data(kYPlane));
-  EXPECT_EQ(u_ptr, buffer->data(kUPlane));
-  EXPECT_EQ(v_ptr, buffer->data(kVPlane));
+  EXPECT_EQ(y_ptr, buffer->DataY());
+  EXPECT_EQ(u_ptr, buffer->DataU());
+  EXPECT_EQ(v_ptr, buffer->DataV());
   EXPECT_EQ(16, buffer->width());
   EXPECT_EQ(16, buffer->height());
 }
@@ -39,16 +39,16 @@
   I420BufferPool pool;
   rtc::scoped_refptr<VideoFrameBuffer> buffer = pool.CreateBuffer(16, 16);
   // Extract non-refcounted pointers for testing.
-  const uint8_t* u_ptr = buffer->data(kUPlane);
-  const uint8_t* v_ptr = buffer->data(kVPlane);
+  const uint8_t* u_ptr = buffer->DataU();
+  const uint8_t* v_ptr = buffer->DataV();
   // Release buffer so that it is returned to the pool.
   buffer = nullptr;
   // Check that the pool doesn't try to reuse buffers of incorrect size.
   buffer = pool.CreateBuffer(32, 16);
   EXPECT_EQ(32, buffer->width());
   EXPECT_EQ(16, buffer->height());
-  EXPECT_NE(u_ptr, buffer->data(kUPlane));
-  EXPECT_NE(v_ptr, buffer->data(kVPlane));
+  EXPECT_NE(u_ptr, buffer->DataU());
+  EXPECT_NE(v_ptr, buffer->DataV());
 }
 
 TEST(TestI420BufferPool, ExclusiveOwner) {
@@ -68,7 +68,7 @@
   EXPECT_EQ(16, buffer->width());
   EXPECT_EQ(16, buffer->height());
   // Try to trigger use-after-free errors by writing to y-plane.
-  memset(buffer->MutableData(kYPlane), 0xA5, 16 * buffer->stride(kYPlane));
+  memset(buffer->MutableDataY(), 0xA5, 16 * buffer->StrideY());
 }
 
 }  // namespace webrtc
diff --git a/common_video/i420_video_frame_unittest.cc b/common_video/i420_video_frame_unittest.cc
index b2f59ea..8368436 100644
--- a/common_video/i420_video_frame_unittest.cc
+++ b/common_video/i420_video_frame_unittest.cc
@@ -258,9 +258,9 @@
 TEST(TestI420FrameBuffer, Copy) {
   rtc::scoped_refptr<I420Buffer> buf1(
       new rtc::RefCountedObject<I420Buffer>(20, 10));
-  memset(buf1->MutableData(kYPlane), 1, 200);
-  memset(buf1->MutableData(kUPlane), 2, 50);
-  memset(buf1->MutableData(kVPlane), 3, 50);
+  memset(buf1->MutableDataY(), 1, 200);
+  memset(buf1->MutableDataU(), 2, 50);
+  memset(buf1->MutableDataV(), 3, 50);
   rtc::scoped_refptr<I420Buffer> buf2 = I420Buffer::Copy(buf1);
   EXPECT_TRUE(test::FrameBufsEqual(buf1, buf2));
 }
diff --git a/common_video/include/video_frame_buffer.h b/common_video/include/video_frame_buffer.h
index e78a1d6..6f082de 100644
--- a/common_video/include/video_frame_buffer.h
+++ b/common_video/include/video_frame_buffer.h
@@ -50,16 +50,36 @@
   virtual int width() const = 0;
   virtual int height() const = 0;
 
+  // TODO(nisse): For the transition, we use default implementations
+  // of the stride and data methods where the new methods calls the
+  // old method, and the old method calls the new methods. Subclasses
+  // must override either the new methods or the old method, to break
+  // infinite recursion. And similarly for the strides. When
+  // applications, in particular Chrome, are updated, delete the old
+  // method and delete the default implementation of the new methods.
+
   // Returns pointer to the pixel data for a given plane. The memory is owned by
   // the VideoFrameBuffer object and must not be freed by the caller.
-  virtual const uint8_t* data(PlaneType type) const = 0;
+  virtual const uint8_t* DataY() const;
+  virtual const uint8_t* DataU() const;
+  virtual const uint8_t* DataV() const;
+  // Deprecated method.
+  // TODO(nisse): Delete after all users are updated.
+  virtual const uint8_t* data(PlaneType type) const;
 
-  // Non-const data access is disallowed by default. You need to make sure you
-  // have exclusive access and a writable buffer before calling this function.
+  // Non-const data access is allowed only if HasOneRef() is true.
+  virtual uint8_t* MutableDataY();
+  virtual uint8_t* MutableDataU();
+  virtual uint8_t* MutableDataV();
+  // Deprecated method. TODO(nisse): Delete after all users are updated.
   virtual uint8_t* MutableData(PlaneType type);
 
   // Returns the number of bytes between successive rows for a given plane.
-  virtual int stride(PlaneType type) const = 0;
+  virtual int StrideY() const;
+  virtual int StrideU() const;
+  virtual int StrideV() const;
+  // Deprecated method. TODO(nisse): Delete after all users are updated.
+  virtual int stride(PlaneType type) const;
 
   // Return the handle of the underlying video frame. This is used when the
   // frame is backed by a texture.
@@ -82,12 +102,19 @@
 
   int width() const override;
   int height() const override;
-  const uint8_t* data(PlaneType type) const override;
-  // Non-const data access is only allowed if HasOneRef() is true to protect
+  const uint8_t* DataY() const override;
+  const uint8_t* DataU() const override;
+  const uint8_t* DataV() const override;
+  // Non-const data access is only allowed if IsMutable() is true, to protect
   // against unexpected overwrites.
   bool IsMutable() override;
-  uint8_t* MutableData(PlaneType type) override;
-  int stride(PlaneType type) const override;
+  uint8_t* MutableDataY() override;
+  uint8_t* MutableDataU() override;
+  uint8_t* MutableDataV() override;
+  int StrideY() const override;
+  int StrideU() const override;
+  int StrideV() const override;
+
   void* native_handle() const override;
   rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
 
@@ -117,8 +144,13 @@
 
   int width() const override;
   int height() const override;
-  const uint8_t* data(PlaneType type) const override;
-  int stride(PlaneType type) const override;
+  const uint8_t* DataY() const override;
+  const uint8_t* DataU() const override;
+  const uint8_t* DataV() const override;
+  int StrideY() const override;
+  int StrideU() const override;
+  int StrideV() const override;
+
   void* native_handle() const override;
   bool IsMutable() override;
 
@@ -144,9 +176,13 @@
 
   bool IsMutable() override;
 
-  const uint8_t* data(PlaneType type) const override;
+  const uint8_t* DataY() const override;
+  const uint8_t* DataU() const override;
+  const uint8_t* DataV() const override;
+  int StrideY() const override;
+  int StrideU() const override;
+  int StrideV() const override;
 
-  int stride(PlaneType type) const override;
   void* native_handle() const override;
 
   rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
diff --git a/common_video/video_frame_buffer.cc b/common_video/video_frame_buffer.cc
index 6ce806e..700dcaf 100644
--- a/common_video/video_frame_buffer.cc
+++ b/common_video/video_frame_buffer.cc
@@ -27,10 +27,80 @@
 
 }  // namespace
 
-uint8_t* VideoFrameBuffer::MutableData(PlaneType type) {
+const uint8_t* VideoFrameBuffer::data(PlaneType type) const {
+  switch (type) {
+    case kYPlane:
+      return DataY();
+    case kUPlane:
+      return DataU();
+    case kVPlane:
+      return DataV();
+    default:
+      RTC_NOTREACHED();
+      return nullptr;
+  }
+}
+
+const uint8_t* VideoFrameBuffer::DataY() const {
+  return data(kYPlane);
+}
+const uint8_t* VideoFrameBuffer::DataU() const {
+  return data(kUPlane);
+}
+const uint8_t* VideoFrameBuffer::DataV() const {
+  return data(kVPlane);
+}
+
+int VideoFrameBuffer::stride(PlaneType type) const {
+  switch (type) {
+    case kYPlane:
+      return StrideY();
+    case kUPlane:
+      return StrideU();
+    case kVPlane:
+      return StrideV();
+    default:
+      RTC_NOTREACHED();
+      return 0;
+  }
+}
+
+int VideoFrameBuffer::StrideY() const {
+  return stride(kYPlane);
+}
+int VideoFrameBuffer::StrideU() const {
+  return stride(kUPlane);
+}
+int VideoFrameBuffer::StrideV() const {
+  return stride(kVPlane);
+}
+
+uint8_t* VideoFrameBuffer::MutableDataY() {
   RTC_NOTREACHED();
   return nullptr;
 }
+uint8_t* VideoFrameBuffer::MutableDataU() {
+  RTC_NOTREACHED();
+  return nullptr;
+}
+uint8_t* VideoFrameBuffer::MutableDataV() {
+  RTC_NOTREACHED();
+  return nullptr;
+}
+
+uint8_t* VideoFrameBuffer::MutableData(PlaneType type) {
+  switch (type) {
+    case kYPlane:
+      return MutableDataY();
+    case kUPlane:
+      return MutableDataU();
+    case kVPlane:
+      return MutableDataV();
+    default:
+      RTC_NOTREACHED();
+      return nullptr;
+  }
+}
 
 VideoFrameBuffer::~VideoFrameBuffer() {}
 
@@ -74,43 +144,41 @@
   return height_;
 }
 
-const uint8_t* I420Buffer::data(PlaneType type) const {
-  switch (type) {
-    case kYPlane:
-      return data_.get();
-    case kUPlane:
-      return data_.get() + stride_y_ * height_;
-    case kVPlane:
-      return data_.get() + stride_y_ * height_ +
-             stride_u_ * ((height_ + 1) / 2);
-    default:
-      RTC_NOTREACHED();
-      return nullptr;
-  }
+const uint8_t* I420Buffer::DataY() const {
+  return data_.get();
+}
+const uint8_t* I420Buffer::DataU() const {
+  return data_.get() + stride_y_ * height_;
+}
+const uint8_t* I420Buffer::DataV() const {
+  return data_.get() + stride_y_ * height_ + stride_u_ * ((height_ + 1) / 2);
 }
 
 bool I420Buffer::IsMutable() {
   return HasOneRef();
 }
 
-uint8_t* I420Buffer::MutableData(PlaneType type) {
+uint8_t* I420Buffer::MutableDataY() {
   RTC_DCHECK(IsMutable());
-  return const_cast<uint8_t*>(
-      static_cast<const VideoFrameBuffer*>(this)->data(type));
+  return const_cast<uint8_t*>(DataY());
+}
+uint8_t* I420Buffer::MutableDataU() {
+  RTC_DCHECK(IsMutable());
+  return const_cast<uint8_t*>(DataU());
+}
+uint8_t* I420Buffer::MutableDataV() {
+  RTC_DCHECK(IsMutable());
+  return const_cast<uint8_t*>(DataV());
 }
 
-int I420Buffer::stride(PlaneType type) const {
-  switch (type) {
-    case kYPlane:
-      return stride_y_;
-    case kUPlane:
-      return stride_u_;
-    case kVPlane:
-      return stride_v_;
-    default:
-      RTC_NOTREACHED();
-      return 0;
-  }
+int I420Buffer::StrideY() const {
+  return stride_y_;
+}
+int I420Buffer::StrideU() const {
+  return stride_u_;
+}
+int I420Buffer::StrideV() const {
+  return stride_v_;
 }
 
 void* I420Buffer::native_handle() const {
@@ -128,12 +196,12 @@
   int height = buffer->height();
   rtc::scoped_refptr<I420Buffer> copy =
       new rtc::RefCountedObject<I420Buffer>(width, height);
-  RTC_CHECK(libyuv::I420Copy(buffer->data(kYPlane), buffer->stride(kYPlane),
-                             buffer->data(kUPlane), buffer->stride(kUPlane),
-                             buffer->data(kVPlane), buffer->stride(kVPlane),
-                             copy->MutableData(kYPlane), copy->stride(kYPlane),
-                             copy->MutableData(kUPlane), copy->stride(kUPlane),
-                             copy->MutableData(kVPlane), copy->stride(kVPlane),
+  RTC_CHECK(libyuv::I420Copy(buffer->DataY(), buffer->StrideY(),
+                             buffer->DataU(), buffer->StrideU(),
+                             buffer->DataV(), buffer->StrideV(),
+                             copy->MutableDataY(), copy->StrideY(),
+                             copy->MutableDataU(), copy->StrideU(),
+                             copy->MutableDataV(), copy->StrideV(),
                              width, height) == 0);
 
   return copy;
@@ -160,12 +228,28 @@
   return height_;
 }
 
-const uint8_t* NativeHandleBuffer::data(PlaneType type) const {
+const uint8_t* NativeHandleBuffer::DataY() const {
+  RTC_NOTREACHED();  // Should not be called.
+  return nullptr;
+}
+const uint8_t* NativeHandleBuffer::DataU() const {
+  RTC_NOTREACHED();  // Should not be called.
+  return nullptr;
+}
+const uint8_t* NativeHandleBuffer::DataV() const {
   RTC_NOTREACHED();  // Should not be called.
   return nullptr;
 }
 
-int NativeHandleBuffer::stride(PlaneType type) const {
+int NativeHandleBuffer::StrideY() const {
+  RTC_NOTREACHED();  // Should not be called.
+  return 0;
+}
+int NativeHandleBuffer::StrideU() const {
+  RTC_NOTREACHED();  // Should not be called.
+  return 0;
+}
+int NativeHandleBuffer::StrideV() const {
   RTC_NOTREACHED();  // Should not be called.
   return 0;
 }
@@ -211,32 +295,24 @@
   return height_;
 }
 
-const uint8_t* WrappedI420Buffer::data(PlaneType type) const {
-  switch (type) {
-    case kYPlane:
-      return y_plane_;
-    case kUPlane:
-      return u_plane_;
-    case kVPlane:
-      return v_plane_;
-    default:
-      RTC_NOTREACHED();
-      return nullptr;
-  }
+const uint8_t* WrappedI420Buffer::DataY() const {
+  return y_plane_;
+}
+const uint8_t* WrappedI420Buffer::DataU() const {
+  return u_plane_;
+}
+const uint8_t* WrappedI420Buffer::DataV() const {
+  return v_plane_;
 }
 
-int WrappedI420Buffer::stride(PlaneType type) const {
-  switch (type) {
-    case kYPlane:
-      return y_stride_;
-    case kUPlane:
-      return u_stride_;
-    case kVPlane:
-      return v_stride_;
-    default:
-      RTC_NOTREACHED();
-      return 0;
-  }
+int WrappedI420Buffer::StrideY() const {
+  return y_stride_;
+}
+int WrappedI420Buffer::StrideU() const {
+  return u_stride_;
+}
+int WrappedI420Buffer::StrideV() const {
+  return v_stride_;
 }
 
 void* WrappedI420Buffer::native_handle() const {
@@ -265,17 +341,17 @@
   const int offset_x = uv_offset_x * 2;
   const int offset_y = uv_offset_y * 2;
 
-  const uint8_t* y_plane = buffer->data(kYPlane) +
-                           buffer->stride(kYPlane) * offset_y + offset_x;
-  const uint8_t* u_plane = buffer->data(kUPlane) +
-                           buffer->stride(kUPlane) * uv_offset_y + uv_offset_x;
-  const uint8_t* v_plane = buffer->data(kVPlane) +
-                           buffer->stride(kVPlane) * uv_offset_y + uv_offset_x;
+  const uint8_t* y_plane = buffer->DataY() +
+                           buffer->StrideY() * offset_y + offset_x;
+  const uint8_t* u_plane = buffer->DataU() +
+                           buffer->StrideU() * uv_offset_y + uv_offset_x;
+  const uint8_t* v_plane = buffer->DataV() +
+                           buffer->StrideV() * uv_offset_y + uv_offset_x;
   return new rtc::RefCountedObject<WrappedI420Buffer>(
       cropped_width, cropped_height,
-      y_plane, buffer->stride(kYPlane),
-      u_plane, buffer->stride(kUPlane),
-      v_plane, buffer->stride(kVPlane),
+      y_plane, buffer->StrideY(),
+      u_plane, buffer->StrideU(),
+      v_plane, buffer->StrideV(),
       rtc::KeepRefUntilDone(buffer));
 }
 
diff --git a/media/engine/webrtcvideoframe.cc b/media/engine/webrtcvideoframe.cc
index 9983db9..145f265 100644
--- a/media/engine/webrtcvideoframe.cc
+++ b/media/engine/webrtcvideoframe.cc
@@ -80,15 +80,15 @@
 }
 
 const uint8_t* WebRtcVideoFrame::GetYPlane() const {
-  return video_frame_buffer_ ? video_frame_buffer_->data(kYPlane) : nullptr;
+  return video_frame_buffer_ ? video_frame_buffer_->DataY() : nullptr;
 }
 
 const uint8_t* WebRtcVideoFrame::GetUPlane() const {
-  return video_frame_buffer_ ? video_frame_buffer_->data(kUPlane) : nullptr;
+  return video_frame_buffer_ ? video_frame_buffer_->DataU() : nullptr;
 }
 
 const uint8_t* WebRtcVideoFrame::GetVPlane() const {
-  return video_frame_buffer_ ? video_frame_buffer_->data(kVPlane) : nullptr;
+  return video_frame_buffer_ ? video_frame_buffer_->DataV() : nullptr;
 }
 
 uint8_t* WebRtcVideoFrame::GetYPlane() {
@@ -107,15 +107,15 @@
 }
 
 int32_t WebRtcVideoFrame::GetYPitch() const {
-  return video_frame_buffer_ ? video_frame_buffer_->stride(kYPlane) : 0;
+  return video_frame_buffer_ ? video_frame_buffer_->StrideY() : 0;
 }
 
 int32_t WebRtcVideoFrame::GetUPitch() const {
-  return video_frame_buffer_ ? video_frame_buffer_->stride(kUPlane) : 0;
+  return video_frame_buffer_ ? video_frame_buffer_->StrideU() : 0;
 }
 
 int32_t WebRtcVideoFrame::GetVPitch() const {
-  return video_frame_buffer_ ? video_frame_buffer_->stride(kVPlane) : 0;
+  return video_frame_buffer_ ? video_frame_buffer_->StrideV() : 0;
 }
 
 bool WebRtcVideoFrame::IsExclusive() const {
diff --git a/test/fake_texture_frame.h b/test/fake_texture_frame.h
index 9575fae..15b70d8 100644
--- a/test/fake_texture_frame.h
+++ b/test/fake_texture_frame.h
@@ -42,9 +42,9 @@
         new rtc::RefCountedObject<I420Buffer>(width_, height_));
     int half_height = (height_ + 1) / 2;
     int half_width = (width_ + 1) / 2;
-    memset(buffer->MutableData(kYPlane), 0, height_ * width_);
-    memset(buffer->MutableData(kUPlane), 0, half_height * half_width);
-    memset(buffer->MutableData(kVPlane), 0, half_height * half_width);
+    memset(buffer->MutableDataY(), 0, height_ * width_);
+    memset(buffer->MutableDataU(), 0, half_height * half_width);
+    memset(buffer->MutableDataV(), 0, half_height * half_width);
     return buffer;
   }
 };
diff --git a/test/frame_utils.cc b/test/frame_utils.cc
index 21daa44..0fad3ad 100644
--- a/test/frame_utils.cc
+++ b/test/frame_utils.cc
@@ -61,14 +61,14 @@
   }
   const int half_width = (f1->width() + 1) / 2;
   const int half_height = (f1->height() + 1) / 2;
-  return EqualPlane(f1->data(webrtc::kYPlane), f2->data(webrtc::kYPlane),
-                    f1->stride(webrtc::kYPlane), f2->stride(webrtc::kYPlane),
+  return EqualPlane(f1->DataY(), f2->DataY(),
+                    f1->StrideY(), f2->StrideY(),
                     f1->width(), f1->height()) &&
-         EqualPlane(f1->data(webrtc::kUPlane), f2->data(webrtc::kUPlane),
-                    f1->stride(webrtc::kUPlane), f2->stride(webrtc::kUPlane),
+         EqualPlane(f1->DataU(), f2->DataU(),
+                    f1->StrideU(), f2->StrideU(),
                     half_width, half_height) &&
-         EqualPlane(f1->data(webrtc::kVPlane), f2->data(webrtc::kVPlane),
-                    f1->stride(webrtc::kVPlane), f2->stride(webrtc::kVPlane),
+         EqualPlane(f1->DataV(), f2->DataV(),
+                    f1->StrideV(), f2->StrideV(),
                     half_width, half_height);
 }