Revert to zero-initializing buffers for FFmpegVideoDecoder

media/base/video_frame.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_VIDEO_FRAME_H_
 #define MEDIA_BASE_VIDEO_FRAME_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 279 matching lines @@
 
   VideoPixelFormat format() const { return format_; }
   StorageType storage_type() const { return storage_type_; }
 
   const gfx::Size& coded_size() const { return coded_size_; }
   const gfx::Rect& visible_rect() const { return visible_rect_; }
   const gfx::Size& natural_size() const { return natural_size_; }
 
   int stride(size_t plane) const;
 
+  // Returns the actual allocation size for a YUV frame that is created by
+  // CreateFrame() method.
+  size_t allocated_size() const { return allocated_size_; }
+
   // Returns the number of bytes per row and number of rows for a given plane.
   //
   // As opposed to stride(), row_bytes() refers to the bytes representing
   // frame data scanlines (coded_size.width() pixels, without stride padding).
   int row_bytes(size_t plane) const;
   int rows(size_t plane) const;
 
   // Returns pointer to the buffer for a given plane, if this is an
   // IsMappable() frame type. The memory is owned by VideoFrame object and must
   // not be freed by the caller.
@@ skipping 127 matching lines @@
 
   // Width and height of the visible portion of the video frame
   // (|visible_rect_.size()|) with aspect ratio taken into account.
   const gfx::Size natural_size_;
 
   // Array of strides for each plane, typically greater or equal to the width
   // of the surface divided by the horizontal sampling period.  Note that
   // strides can be negative.
   int32 strides_[kMaxPlanes];
 
+  // Actual allocation size for a YUV frame with alignments and padding.
+  size_t allocated_size_;

[miu, 2015/08/04 20:16:22]

This isn't needed.  See comments below.

+
   // Array of data pointers to each plane.
   // TODO(mcasas): we don't know on ctor if we own |data_| or not. After
   // refactoring VideoFrame, change to scoped_ptr<uint8, AlignedFreeDeleter>.
   uint8* data_[kMaxPlanes];
 
   // Native texture mailboxes, if this is a IsTexture() frame.
   gpu::MailboxHolder mailbox_holders_[kMaxPlanes];
   ReleaseMailboxCB mailbox_holders_release_cb_;
 
   // Shared memory handle and associated offset inside it, if this frame is
@@ skipping 19 matching lines @@
   uint32 release_sync_point_;
 
   VideoFrameMetadata metadata_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoFrame);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_VIDEO_FRAME_H_