[Chromecast] Add new volume control API to CastMediaShlib

chromecast/media/cma/backend/audio_decoder_wrapper.cc

-// Copyright 2016 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.
-
-#include "chromecast/media/cma/backend/audio_decoder_wrapper.h"
-
-#include "base/logging.h"
-
-namespace chromecast {
-namespace media {
-
-AudioDecoderWrapper::AudioDecoderWrapper(
-    MediaPipelineBackend::AudioDecoder* audio_decoder)
-    : audio_decoder_(audio_decoder),
-      stream_type_volume_(1.0),
-      stream_volume_(1.0) {
-  DCHECK(audio_decoder_);
-}
-
-AudioDecoderWrapper::~AudioDecoderWrapper() {
-}
-
-void AudioDecoderWrapper::SetDelegate(Delegate* delegate) {
-  audio_decoder_->SetDelegate(delegate);
-}
-
-MediaPipelineBackend::BufferStatus AudioDecoderWrapper::PushBuffer(
-    CastDecoderBuffer* buffer) {
-  return audio_decoder_->PushBuffer(buffer);
-}
-
-void AudioDecoderWrapper::GetStatistics(Statistics* statistics) {
-  audio_decoder_->GetStatistics(statistics);
-}
-
-bool AudioDecoderWrapper::SetConfig(const AudioConfig& config) {
-  return audio_decoder_->SetConfig(config);
-}
-
-bool AudioDecoderWrapper::SetVolume(float multiplier) {
-  stream_volume_ = multiplier;
-  return audio_decoder_->SetVolume(stream_volume_ * stream_type_volume_);
-}
-
-AudioDecoderWrapper::RenderingDelay AudioDecoderWrapper::GetRenderingDelay() {
-  return audio_decoder_->GetRenderingDelay();
-}
-
-bool AudioDecoderWrapper::SetStreamTypeVolume(float stream_type_volume) {
-  stream_type_volume_ = stream_type_volume;
-  return audio_decoder_->SetVolume(stream_volume_ * stream_type_volume_);
-}
-
-}  // namespace media
-}  // namespace chromecast