Moving WebRtcVoiceMediaChannel::SendSetCodec to AudioSendStream.

webrtc/api/call/audio_send_stream.h

Index: webrtc/api/call/audio_send_stream.h
diff --git a/webrtc/api/call/audio_send_stream.h b/webrtc/api/call/audio_send_stream.h
index b309f7a221c6c07298f0a13133dfbb2389a5b746..c1f06651ac68c7eff29eb7af102d4c80772657e2 100644
--- a/webrtc/api/call/audio_send_stream.h
+++ b/webrtc/api/call/audio_send_stream.h
@@ -94,6 +94,68 @@ class AudioSendStream {
     // Note: This is still an experimental feature and not ready for real usage.
     int min_bitrate_kbps = -1;
     int max_bitrate_kbps = -1;
+
+    int max_send_bitrate_bps = 0;
+
+    struct SendCodecSpec {
+      SendCodecSpec() {
+        webrtc::CodecInst empty_inst = {0};
+        codec_inst = empty_inst;
+        codec_inst.pltype = -1;
+      }
+      bool operator==(const SendCodecSpec& rhs) const {
+        {
+          if (nack_enabled != rhs.nack_enabled) {
+            return false;
+          }
+          if (transport_cc_enabled != rhs.transport_cc_enabled) {
+            return false;
+          }
+          if (enable_codec_fec != rhs.enable_codec_fec) {
+            return false;
+          }
+          if (enable_opus_dtx != rhs.enable_opus_dtx) {
+            return false;
+          }
+          if (opus_max_playback_rate != rhs.opus_max_playback_rate) {
+            return false;
+          }
+          if (red_payload_type != rhs.red_payload_type) {
+            return false;
+          }
+          if (cng_payload_type != rhs.cng_payload_type) {
+            return false;
+          }
+          if (cng_plfreq != rhs.cng_plfreq) {
+            return false;
+          }
+          if (codec_inst != rhs.codec_inst) {
+            return false;
+          }
+          return true;
+        }
+      }
+      bool operator!=(const SendCodecSpec& rhs) const {
+        return !(*this == rhs);
+      }
+
+      bool nack_enabled = false;
+      bool transport_cc_enabled = false;
+      bool enable_codec_fec = false;
+      bool enable_opus_dtx = false;
+      int opus_max_playback_rate = 0;
+      int red_payload_type = -1;
+      int cng_payload_type = -1;
+      int cng_plfreq = -1;
+      webrtc::CodecInst codec_inst;
+    } send_codec_spec;
+
+    struct CodecPref {

[the sun, 2016/10/13 08:51:32]

I think you can do even better by adding to SendCodecSpec:

bool is_multi_rate;
int max_bitrate_bps;

and iterating through the WVoE CodecPrefs list and figure this information out
before pushing the new config. It doesn't look like it will affect the logic
severly.

+      const char* name;
+      int clockrate;
+      bool is_multi_rate;
+      int max_bitrate_bps;
+    } codec_prefs[11];
   };
 
   // Starts stream activity.