VideoCaptureFormat: add method to print out pixel format as string

media/video/capture/video_capture_types.cc

 // Copyright 2013 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.
 
 #include "media/video/capture/video_capture_types.h"
 
+#include "base/logging.h"
 #include "media/base/limits.h"
 
 namespace media {
 
 VideoCaptureFormat::VideoCaptureFormat()
     : frame_rate(0.0f), pixel_format(PIXEL_FORMAT_UNKNOWN) {}
 
 VideoCaptureFormat::VideoCaptureFormat(const gfx::Size& frame_size,
                                        float frame_rate,
                                        VideoPixelFormat pixel_format)
     : frame_size(frame_size),
       frame_rate(frame_rate),
       pixel_format(pixel_format) {}
 
 bool VideoCaptureFormat::IsValid() const {
   return (frame_size.width() < media::limits::kMaxDimension) &&
          (frame_size.height() < media::limits::kMaxDimension) &&
          (frame_size.GetArea() >= 0) &&
          (frame_size.GetArea() < media::limits::kMaxCanvas) &&
          (frame_rate >= 0.0f) &&
          (frame_rate < media::limits::kMaxFramesPerSecond) &&
          (pixel_format >= PIXEL_FORMAT_UNKNOWN) &&
          (pixel_format < PIXEL_FORMAT_MAX);
 }
 
+std::string VideoCaptureFormat::PixelFormatToString(VideoPixelFormat format) {
+  switch (format) {
+  case PIXEL_FORMAT_UNKNOWN:
+    return "UNKNOWN";
+  case PIXEL_FORMAT_I420:
+    return "I420";
+  case PIXEL_FORMAT_YUY2:
+    return "YUY2";
+  case PIXEL_FORMAT_UYVY:
+    return "UYUY";
+  case PIXEL_FORMAT_RGB24:
+    return "RGB24";
+  case PIXEL_FORMAT_ARGB:
+    return "ARGB";
+  case PIXEL_FORMAT_MJPEG:
+    return "MJPEG";
+  case PIXEL_FORMAT_NV21:
+    return "YV12";
+  case PIXEL_FORMAT_YV12:
+    return "YV12";
+  case PIXEL_FORMAT_TEXTURE:
+    return "TEXTURE";
+  case PIXEL_FORMAT_MAX:
+    break;
+  }
+  NOTREACHED() << "Invalid VideoPixelFormat provided: " << format;
+  return "";
+}
+
 VideoCaptureParams::VideoCaptureParams() : allow_resolution_change(false) {}
 
 }  // namespace media