Return parsed sample frequency of ADTS header

media/formats/mpeg/adts_header_parser.h

Index: media/formats/mpeg/adts_header_parser.h
diff --git a/media/formats/mpeg/adts_header_parser.h b/media/formats/mpeg/adts_header_parser.h
index e613015458767b0f80ad78b7eae56bd3f21c4235..c15a779a043ccd025616ca56d947752d5f2a5cc6 100644
--- a/media/formats/mpeg/adts_header_parser.h
+++ b/media/formats/mpeg/adts_header_parser.h
@@ -5,6 +5,7 @@
 #ifndef MEDIA_FORMATS_MPEG_ADTS_HEADER_PARSER_H_
 #define MEDIA_FORMATS_MPEG_ADTS_HEADER_PARSER_H_
 
+#include <stddef.h>
 #include <stdint.h>
 
 #include "media/base/media_export.h"
@@ -16,10 +17,12 @@ class AudioDecoderConfig;
 // Parses ADTS header |adts_header| (4 bytes) and extracts the information into
 // |config| structure if the parsing succeeds. Returns true if the parsing
 // succeeds or false otherwise. The |is_sbr| flag stands for Spectral Band
-// Replication.
+// Replication. |orig_sample_rate| will return the sample frequency before
+// doubling in SBR.
 MEDIA_EXPORT bool ParseAdtsHeader(const uint8_t* adts_header,
                                   bool is_sbr,
-                                  AudioDecoderConfig* config);
+                                  AudioDecoderConfig* config,
+                                  size_t* orig_sample_rate);
 
 }  // namespace media