Injectable audio encoders: BuiltinAudioEncoderFactory

webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h

Index: webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
diff --git a/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h b/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
index f1f2714ff9ce5d4272f4c3e8292d570c258b341f..649fc54599bfa8d4a845fe596a1d171bd188acb7 100644
--- a/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
+++ b/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
@@ -13,6 +13,7 @@
 
 #include <vector>
 
+#include "webrtc/api/audio_codecs/audio_format.h"
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/scoped_ref_ptr.h"
 #include "webrtc/modules/audio_coding/codecs/audio_encoder.h"
@@ -55,8 +56,13 @@ class AudioEncoderIsacT final : public AudioEncoder {
   explicit AudioEncoderIsacT(
       const CodecInst& codec_inst,
       const rtc::scoped_refptr<LockedIsacBandwidthInfo>& bwinfo);
+  AudioEncoderIsacT(int payload_type, const SdpAudioFormat& format);
   ~AudioEncoderIsacT() override;
 
+  static constexpr const char* GetPayloadName() { return "isac"; }
+  static rtc::Optional<AudioFormatInfo> QueryAudioFormat(
+      const SdpAudioFormat& format);
+
   int SampleRateHz() const override;
   size_t NumChannels() const override;
   size_t Num10MsFramesInNextPacket() const override;