Pass more detailed audio hardware configuration information to the renderer

media/ffmpeg/ffmpeg_common.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_FFMPEG_FFMPEG_COMMON_H_
 #define MEDIA_FFMPEG_FFMPEG_COMMON_H_
 
 // Used for FFmpeg error codes.
 #include <cerrno>
 
@@ skipping 73 matching lines @@
     VideoDecoderConfig* config);
 void VideoDecoderConfigToAVCodecContext(
     const VideoDecoderConfig& config,
     AVCodecContext* codec_context);
 
 // 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);
+// Given the number of channels, return the best layout,
+// or return CHANNEL_LAYOUT_UNSUPPORTED if there is no good match.
+ChannelLayout GuessChannelLayout(int channels);

[DaleCurtis, 2013/03/07 02:41:39]

Needs to be moved to channel_layout

[Chris Rogers, 2013/03/09 01:37:50]

Done.

 
 // 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);
 
 // Converts an FFmpeg video codec ID into its corresponding supported codec id.
 VideoCodec CodecIDToVideoCodec(CodecID codec_id);
 
 // Converts an FFmpeg audio codec ID into its corresponding supported codec id.
 AudioCodec CodecIDToAudioCodec(CodecID codec_id);
 
 }  // namespace media
 
 #endif  // MEDIA_FFMPEG_FFMPEG_COMMON_H_