Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}

api/audio_codecs/audio_encoder_factory.h

@@ -0,0 +1,46 @@
+/*
+ *  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_AUDIO_ENCODER_FACTORY_H_
+#define WEBRTC_API_AUDIO_CODECS_AUDIO_ENCODER_FACTORY_H_
+
+#include <memory>
+#include <vector>
+
+#include "webrtc/api/audio_codecs/audio_encoder.h"
+#include "webrtc/api/audio_codecs/audio_format.h"
+#include "webrtc/rtc_base/refcount.h"
+
+namespace webrtc {
+
+// A factory that creates AudioEncoders.
+// NOTE: This class is still under development and may change without notice.
+class AudioEncoderFactory : public rtc::RefCountInterface {
+ public:
+  // Returns a prioritized list of audio codecs, to use for signaling etc.
+  virtual std::vector<AudioCodecSpec> GetSupportedEncoders() = 0;
+
+  // Returns information about how this format would be encoded, provided it's
+  // supported. More format and format variations may be supported than those
+  // returned by GetSupportedEncoders().
+  virtual rtc::Optional<AudioCodecInfo> QueryAudioEncoder(
+      const SdpAudioFormat& format) = 0;
+
+  // Creates an AudioEncoder for the specified format. The encoder will tags its
+  // payloads with the specified payload type.
+  // TODO(ossu): Try to avoid audio encoders having to know their payload type.
+  virtual std::unique_ptr<AudioEncoder> MakeAudioEncoder(
+      int payload_type,
+      const SdpAudioFormat& format) = 0;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_API_AUDIO_CODECS_AUDIO_ENCODER_FACTORY_H_