Expose ILBC codec in webrtc/api/audio_codecs/

webrtc/api/audio_codecs/ilbc/audio_encoder_ilbc.h

Index: webrtc/api/audio_codecs/ilbc/audio_encoder_ilbc.h
diff --git a/webrtc/api/audio_codecs/ilbc/audio_encoder_ilbc.h b/webrtc/api/audio_codecs/ilbc/audio_encoder_ilbc.h
new file mode 100644
index 0000000000000000000000000000000000000000..42010354a3841881b5a49c9e8230b37e7d7a4a83
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+++ b/webrtc/api/audio_codecs/ilbc/audio_encoder_ilbc.h
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+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_
+#define WEBRTC_API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_
+
+#include <memory>
+#include <vector>
+
+#include "webrtc/api/audio_codecs/audio_encoder.h"
+#include "webrtc/api/audio_codecs/audio_format.h"
+#include "webrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_config.h"
+#include "webrtc/base/optional.h"
+
+namespace webrtc {
+
+// ILBC encoder API for use as a template parameter to
+// CreateAudioEncoderFactory<...>().
+//
+// NOTE: This struct is still under development and may change without notice.
+struct AudioEncoderIlbc {
+  static rtc::Optional<AudioEncoderIlbcConfig> SdpToConfig(
+      const SdpAudioFormat& audio_format);
+  static void AppendSupportedEncoders(std::vector<AudioCodecSpec>* specs);
+  static AudioCodecInfo QueryAudioEncoder(const AudioEncoderIlbcConfig& config);
+  static std::unique_ptr<AudioEncoder> MakeAudioEncoder(
+      const AudioEncoderIlbcConfig& config,
+      int payload_type);
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_