New interface (AudioDecoderFactory), with an implementation

webrtc/modules/audio_coding/codecs/audio_format.cc

+/*
+ *  Copyright (c) 2016 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.
+ */
+
+#include "webrtc/modules/audio_coding/codecs/audio_format.h"
+
+namespace webrtc {
+
+SdpAudioFormat::SdpAudioFormat() = default;
+SdpAudioFormat::SdpAudioFormat(const SdpAudioFormat&) = default;
+SdpAudioFormat::SdpAudioFormat(SdpAudioFormat&&) = default;
+
+SdpAudioFormat::SdpAudioFormat(const char* name,
+                               int clockrate_hz,
+                               int num_channels)
+    : name(name), clockrate_hz(clockrate_hz), num_channels(num_channels) {}
+
+SdpAudioFormat::~SdpAudioFormat() = default;
+SdpAudioFormat& SdpAudioFormat::operator=(const SdpAudioFormat&) = default;
+SdpAudioFormat& SdpAudioFormat::operator=(SdpAudioFormat&&) = default;
+
+void swap(SdpAudioFormat& a, SdpAudioFormat& b) {
+  using std::swap;
+  swap(a.name, b.name);
+  swap(a.clockrate_hz, b.clockrate_hz);
+  swap(a.num_channels, b.num_channels);
+  swap(a.parameters, b.parameters);
+}
+
+std::ostream& operator<<(std::ostream& os, const SdpAudioFormat& saf) {
+  os << "{name: " << saf.name;
+  os << ", clockrate_hz: " << saf.clockrate_hz;
+  os << ", num_channels: " << saf.num_channels;
+  os << ", parameters: {";
+  const char* sep = "";
+  for (const auto& kv : saf.parameters) {
+    os << sep << kv.first << ": " << kv.second;
+    sep = ", ";
+  }
+  os << "}}";
+  return os;
+}
+
+}  // namespace webrtc