Fix support for yuv_422 pixel format.

media/ffmpeg/ffmpeg_common.h

 // Copyright (c) 2011 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_FFMPEG_FFMPEG_COMMON_H_
 #define MEDIA_FFMPEG_FFMPEG_COMMON_H_
 
 // Used for FFmpeg error codes.
 #include <cerrno>
 
@@ skipping 64 matching lines @@
 
 VideoCodec CodecIDToVideoCodec(CodecID codec_id);
 CodecID VideoCodecToCodecID(VideoCodec video_codec);
 
 // Converts FFmpeg's channel layout to chrome's ChannelLayout.  |channels| can
 // be used when FFmpeg's channel layout is not informative in order to make a
 // good guess about the plausible channel layout based on number of channels.
 ChannelLayout ChannelLayoutToChromeChannelLayout(int64_t layout,
                                                  int channels);
 
+// Converts FFmpeg's pixel formats to its corresponding supported video format.
+VideoFrame::Format PixelFormatToVideoFormat(PixelFormat pixel_format);
+
+// Converts video formats to its corresponding FFmpeg's pixel formats.
+PixelFormat VideoFormatToPixelFormat(VideoFrame::Format video_format);
+
 // Calculates duration of one frame in the |stream| based on its frame rate.
 base::TimeDelta GetFrameDuration(AVStream* stream);
 
 // Get the timestamp of the next seek point after |timestamp|.
 // Returns true if a valid seek point was found after |timestamp| and
 // |seek_time| was set. Returns false if a seek point could not be
 // found or the parameters are invalid.
 MEDIA_EXPORT bool GetSeekTimeAfter(AVStream* stream,
                                    const base::TimeDelta& timestamp,
                                    base::TimeDelta* seek_time);
@@ skipping 23 matching lines @@
 int GetNaturalHeight(AVStream* stream);
 int GetNaturalWidth(AVStream* stream);
 
 // Closes & destroys all AVStreams in the context and then closes &
 // destroys the AVFormatContext.
 void DestroyAVFormatContext(AVFormatContext* format_context);
 
 }  // namespace media
 
 #endif  // MEDIA_FFMPEG_FFMPEG_COMMON_H_