Ability for demuxer clients to get to FFmpeg's AVStream object exposed as an ...

media/filters/ffmpeg_common.h

 // Copyright (c) 2009 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_FILTERS_FFMPEG_COMMON_H_
+#define MEDIA_FILTERS_FFMPEG_COMMON_H_
+
 // Used for FFmpeg error codes.
 #include <cerrno>
 
 #include "base/compiler_specific.h"
 
 // Include FFmpeg header files.
 extern "C" {
 // Temporarily disable possible loss of data warning.
 // TODO(scherkus): fix and upstream the compiler warnings.
 MSVC_PUSH_DISABLE_WARNING(4244);
 #include "third_party/ffmpeg/include/libavcodec/avcodec.h"
 #include "third_party/ffmpeg/include/libavformat/avformat.h"
 MSVC_POP_WARNING();
 }  // extern "C"
 
 namespace media {
 
 // MediaFormat key identifying the CodecID.
 extern const char kFFmpegCodecID[];
 
 // FFmpeg MIME types.
 namespace mime_type {
 
 extern const char kFFmpegAudio[];
 extern const char kFFmpegVideo[];
 
 }  // namespace mime_type
 
+namespace interface_id {
+
+extern const char kFFmpegDemuxerStream[];
+
+}  // namespace interface_id
+
+
 }  // namespace media
+
+#endif  // MEDIA_FILTERS_FFMPEG_COMMON_H_