Introduce VideoConfig/AudioConfig class for CMA backend

chromecast/media/cma/base/decoder_config_adapter.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMECAST_MEDIA_CMA_BASE_DECODER_CONFIG_ADAPTER_H_
+#define CHROMECAST_MEDIA_CMA_BASE_DECODER_CONFIG_ADAPTER_H_
+
+namespace media {
+class AudioDecoderConfig;
+class VideoDecoderConfig;
+}  // namespace media
+
+namespace chromecast {
+namespace media {
+
+class AudioConfig;
+class VideoConfig;
+
+class DecoderConfigAdapter {
+ public:
+  // Converts ::media::AudioDecoderConfig to chromecast::media::AudioConfig
+  static AudioConfig ToAudioConfig(const ::media::AudioDecoderConfig& config);
+
+  // Converts ::media::VideoDecoderConfig to chromecast::media::VideoConfig
+  static VideoConfig ToVideoConfig(const ::media::VideoDecoderConfig& config);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_BASE_DECODER_CONFIG_ADAPTER_H_