1 files changed, 15 insertions, 0 deletions
diff --git a/modules/rtp_rtcp/source/rtp_header_extensions.h b/modules/rtp_rtcp/source/rtp_header_extensions.h
index f6e7a579ab..b47824afdb 100644
--- a/modules/rtp_rtcp/source/rtp_header_extensions.h
+++ b/modules/rtp_rtcp/source/rtp_header_extensions.h
@@ -14,6 +14,7 @@
 #include <stdint.h>
 
 #include <string>
+#include <vector>
 
 #include "api/array_view.h"
 #include "api/rtp_headers.h"
@@ -77,6 +78,20 @@ class AudioLevel {
                     uint8_t audio_level);
 };
 
+class CsrcAudioLevel {
+ public:
+  static constexpr RTPExtensionType kId = kRtpExtensionCsrcAudioLevel;
+  static constexpr uint8_t kMaxValueSizeBytes = 15;
+  static constexpr const char kUri[] =
+      "urn:ietf:params:rtp-hdrext:csrc-audio-level";
+
+  static bool Parse(rtc::ArrayView<const uint8_t> data,
+                    std::vector<uint8_t>* csrc_audio_levels);
+  static size_t ValueSize(rtc::ArrayView<const uint8_t> csrc_audio_levels);
+  static bool Write(rtc::ArrayView<uint8_t> data,
+                    rtc::ArrayView<const uint8_t> csrc_audio_levels);
+};
+
 class TransmissionOffset {
  public:
   using value_type = int32_t;