VideoCaptureFormat: add method to print out pixel format as string

media/video/capture/video_capture_types.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_VIDEO_CAPTURE_VIDEO_CAPTURE_TYPES_H_
 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_TYPES_H_
 
 #include <vector>
 
 #include "media/base/media_export.h"
@@ skipping 28 matching lines @@
 // This class is used by the video capture device to specify the format of every
 // frame captured and returned to a client. It is also used to specify a
 // supported capture format by a device.
 class MEDIA_EXPORT VideoCaptureFormat {
  public:
   VideoCaptureFormat();
   VideoCaptureFormat(const gfx::Size& frame_size,
                      float frame_rate,
                      VideoPixelFormat pixel_format);
 
+  static std::string PixelFormatToString(VideoPixelFormat format);
+
   // Checks that all values are in the expected range. All limits are specified
   // in media::Limits.
   bool IsValid() const;
 
   gfx::Size frame_size;
   float frame_rate;
   VideoPixelFormat pixel_format;
 };
 
 typedef std::vector<VideoCaptureFormat> VideoCaptureFormats;
 
 // Parameters for starting video capture.
 // This class is used by the client of a video capture device to specify the
 // format of frames in which the client would like to have captured frames
 // returned.
 class MEDIA_EXPORT VideoCaptureParams {
  public:
   VideoCaptureParams();
 
   // Requests a resolution and format at which the capture will occur.
   VideoCaptureFormat requested_format;
 
   // Allow mid-capture resolution change.
   bool allow_resolution_change;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_TYPES_H_