diff --git a/webrtc/api/audio_codecs/audio_format.cc b/webrtc/api/audio_codecs/audio_format.cc
index ea5f183923..de8b1fd8d4 100644
--- a/webrtc/api/audio_codecs/audio_format.cc
+++ b/webrtc/api/audio_codecs/audio_format.cc
@@ -108,4 +108,23 @@ AudioCodecInfo::AudioCodecInfo(int sample_rate_hz,
   RTC_DCHECK_GE(max_bitrate_bps, default_bitrate_bps);
 }
 
+std::ostream& operator<<(std::ostream& os, const AudioCodecInfo& aci) {
+  os << "{sample_rate_hz: " << aci.sample_rate_hz;
+  os << ", num_channels: " << aci.num_channels;
+  os << ", default_bitrate_bps: " << aci.default_bitrate_bps;
+  os << ", min_bitrate_bps: " << aci.min_bitrate_bps;
+  os << ", max_bitrate_bps: " << aci.max_bitrate_bps;
+  os << ", allow_comfort_noise: " << aci.allow_comfort_noise;
+  os << ", supports_network_adaption: " << aci.supports_network_adaption;
+  os << "}";
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const AudioCodecSpec& acs) {
+  os << "{format: " << acs.format;
+  os << ", info: " << acs.info;
+  os << "}";
+  return os;
+}
+
 }  // namespace webrtc
diff --git a/webrtc/api/audio_codecs/audio_format.h b/webrtc/api/audio_codecs/audio_format.h
index d8e33426b6..e8e5774e75 100644
--- a/webrtc/api/audio_codecs/audio_format.h
+++ b/webrtc/api/audio_codecs/audio_format.h
@@ -120,6 +120,8 @@ struct AudioCodecInfo {
                                            // network conditions.
 };
 
+std::ostream& operator<<(std::ostream& os, const AudioCodecInfo& aci);
+
 // AudioCodecSpec ties an audio format to specific information about the codec
 // and its implementation.
 struct AudioCodecSpec {
@@ -133,6 +135,8 @@ struct AudioCodecSpec {
   AudioCodecInfo info;
 };
 
+std::ostream& operator<<(std::ostream& os, const AudioCodecSpec& acs);
+
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_AUDIO_CODECS_AUDIO_FORMAT_H_