Added BitsPerChannel method to video frame class.

media/base/video_frame.cc

 // 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.
 
 #include "media/base/video_frame.h"
 
 #include <algorithm>
 #include <climits>
 
 #include "base/atomic_sequence_num.h"
@@ skipping 777 matching lines @@
   if (metadata()->IsTrue(media::VideoFrameMetadata::END_OF_STREAM))
     return "end of stream";
 
   std::ostringstream s;
   s << ConfigToString(format_, storage_type_, coded_size_, visible_rect_,
                       natural_size_)
     << " timestamp:" << timestamp_.InMicroseconds();
   return s.str();
 }
 
+int VideoFrame::BitsPerChannel(VideoPixelFormat format) {
+  int bits_per_channel = 0;
+  switch (format) {
+    case media::PIXEL_FORMAT_UNKNOWN:
+      NOTREACHED();
+    // Fall through!
+    case media::PIXEL_FORMAT_I420:
+    case media::PIXEL_FORMAT_YV12:
+    case media::PIXEL_FORMAT_YV16:
+    case media::PIXEL_FORMAT_YV12A:
+    case media::PIXEL_FORMAT_YV24:
+    case media::PIXEL_FORMAT_NV12:
+    case media::PIXEL_FORMAT_NV21:
+    case media::PIXEL_FORMAT_UYVY:
+    case media::PIXEL_FORMAT_YUY2:
+    case media::PIXEL_FORMAT_ARGB:
+    case media::PIXEL_FORMAT_XRGB:
+    case media::PIXEL_FORMAT_RGB24:
+    case media::PIXEL_FORMAT_RGB32:
+    case media::PIXEL_FORMAT_MJPEG:
+    case media::PIXEL_FORMAT_MT21:
+    case media::PIXEL_FORMAT_Y8:
+    case media::PIXEL_FORMAT_I422:
+      bits_per_channel = 8;
+      break;
+    case media::PIXEL_FORMAT_YUV420P9:
+    case media::PIXEL_FORMAT_YUV422P9:
+    case media::PIXEL_FORMAT_YUV444P9:
+      bits_per_channel = 9;
+      break;
+    case media::PIXEL_FORMAT_YUV420P10:
+    case media::PIXEL_FORMAT_YUV422P10:
+    case media::PIXEL_FORMAT_YUV444P10:
+      bits_per_channel = 10;
+      break;
+    case media::PIXEL_FORMAT_YUV420P12:
+    case media::PIXEL_FORMAT_YUV422P12:
+    case media::PIXEL_FORMAT_YUV444P12:
+      bits_per_channel = 12;
+      break;
+    case media::PIXEL_FORMAT_Y16:
+      bits_per_channel = 16;
+      break;
+  }
+  return bits_per_channel;
+}
+
 // static
 scoped_refptr<VideoFrame> VideoFrame::WrapExternalStorage(
     VideoPixelFormat format,
     StorageType storage_type,
     const gfx::Size& coded_size,
     const gfx::Rect& visible_rect,
     const gfx::Size& natural_size,
     uint8_t* data,
     size_t data_size,
     base::TimeDelta timestamp,
@@ skipping 344 matching lines @@
   if (zero_initialize_memory)
     memset(data, 0, data_size);
 
   for (size_t plane = 0; plane < NumPlanes(format_); ++plane)
     data_[plane] = data + offset[plane];
 
   AddDestructionObserver(base::Bind(&base::AlignedFree, data));
 }
 
 }  // namespace media