Add config change support to 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 "base/callback.h"
 #include "base/md5.h"
 #include "media/base/buffers.h"
@@ skipping 28 matching lines @@
 
   // Creates a new frame in system memory with given parameters. Buffers for
   // the frame are allocated but not initialized.
   static scoped_refptr<VideoFrame> CreateFrame(
       Format format,
       size_t width,
       size_t height,
       base::TimeDelta timestamp,
       base::TimeDelta duration);
 
+  static scoped_refptr<VideoFrame> CreateFrame(
+      Format format,
+      size_t width,
+      size_t height,
+      size_t natural_width,

[Ami GONE FROM CHROMIUM, 2012/07/13 00:59:05]

You need serious commentary about how the "natural_" prefix modifies the meaning
of the parameter.

+      size_t natural_height,
+      base::TimeDelta timestamp,
+      base::TimeDelta duration);
+
   // Call prior to CreateFrame to ensure validity of frame configuration. Called
   // automatically by VideoDecoderConfig::IsValidConfig().
   // TODO(scherkus): VideoDecoderConfig shouldn't call this method
   static bool IsValidConfig(
       Format format,
       size_t width,
       size_t height);
 
   // Wraps a native texture of the given parameters with a VideoFrame.  When the
   // frame is destroyed |no_longer_needed.Run()| will be called.
   static scoped_refptr<VideoFrame> WrapNativeTexture(
       uint32 texture_id,
       uint32 texture_target,
       size_t width,
       size_t height,
+      size_t natural_width,
+      size_t natural_height,
       base::TimeDelta timestamp,
       base::TimeDelta duration,
       const base::Closure& no_longer_needed);
 
   // Creates a frame with format equals to VideoFrame::EMPTY, width, height
   // timestamp and duration are all 0.
   static scoped_refptr<VideoFrame> CreateEmptyFrame();
 
   // Allocates YV12 frame based on |width| and |height|, and sets its data to
   // the YUV equivalent of RGB(0,0,0).
   static scoped_refptr<VideoFrame> CreateBlackFrame(int width, int height);
 
   Format format() const { return format_; }
 
   size_t width() const { return width_; }
 
   size_t height() const { return height_; }
 
+  size_t natural_width() const { return natural_width_; }
+
+  size_t natural_height() const { return natural_height_; }
+
   int stride(size_t plane) const;
 
   // 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
   // visible pixels.
   int row_bytes(size_t plane) const;
   int rows(size_t plane) const;
 
   // Returns pointer to the buffer for a given plane. The memory is owned by
@@ skipping 27 matching lines @@
   // Used to keep a running hash of seen frames.  Expects an initialized MD5
   // context.  Calls MD5Update with the context and the contents of the frame.
   void HashFrameForTesting(base::MD5Context* context);
 
  private:
   friend class base::RefCountedThreadSafe<VideoFrame>;
   // Clients must use the static CreateFrame() method to create a new frame.
   VideoFrame(Format format,
              size_t video_width,
              size_t video_height,
+             size_t natural_width,
+             size_t natural_height,
              base::TimeDelta timestamp,
              base::TimeDelta duration);
   virtual ~VideoFrame();
 
   // Used internally by CreateFrame().
   void AllocateRGB(size_t bytes_per_pixel);
   void AllocateYUV();
 
   // Used to DCHECK() plane parameters.
   bool IsValidPlane(size_t plane) const;
 
   // Frame format.
   Format format_;
 
   // Width and height of surface.
   size_t width_;
   size_t height_;
 
+  // Aspect corrected width and height.
+  size_t natural_width_;
+  size_t natural_height_;
+
   // 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];
 
   // Array of data pointers to each plane.
   uint8* data_[kMaxPlanes];
 
   // Native texture ID, if this is a NATIVE_TEXTURE frame.
   uint32 texture_id_;
   uint32 texture_target_;
   base::Closure texture_no_longer_needed_;
 
   base::TimeDelta timestamp_;
   base::TimeDelta duration_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoFrame);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_VIDEO_FRAME_H_