blob: 1fa8d0931dd3323361e303d0c2714ecaf4f36a6d [file] [log] [blame]
// Copyright 2018 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 <string>
#include <vector>
#include "base/macros.h"
#include "chromecast/media/cma/backend/mixer_input.h"
#include "chromecast/public/media/media_pipeline_backend.h"
#include "chromecast/public/volume_control.h"
namespace media {
class AudioBus;
} // namespace media
namespace chromecast {
namespace media {
class DirectAudioSource;
struct MediaPipelineDeviceParams;
class StreamMixer;
// Empty interface so we can use a pointer to DirectMixerSource as the token.
class DirectAudioSourceToken {};
// A simple adapter for DirectAudioSource to map the public API to the
// MixerInput::Source API.
class DirectMixerSource : public MixerInput::Source,
public DirectAudioSourceToken {
using RenderingDelay = MediaPipelineBackend::AudioDecoder::RenderingDelay;
DirectMixerSource(DirectAudioSource* direct_source,
const MediaPipelineDeviceParams& params,
int playout_channel);
// Sets the volume multiplier for this stream. If |multiplier| < 0, sets the
// volume multiplier to 0.
void SetVolumeMultiplier(float multiplier);
// Removes this source from the mixer asynchronously. After this method is
// called, no more calls will be made to delegate methods. The source will
// be removed from the mixer once it has faded out appropriately.
void Remove();
~DirectMixerSource() override;
// MixerInput::Source implementation:
int num_channels() override;
int input_samples_per_second() override;
bool primary() override;
const std::string& device_id() override;
AudioContentType content_type() override;
int desired_read_size() override;
int playout_channel() override;
void InitializeAudioPlayback(int read_size,
RenderingDelay initial_rendering_delay) override;
int FillAudioPlaybackFrames(int num_frames,
RenderingDelay rendering_delay,
::media::AudioBus* buffer) override;
void OnAudioPlaybackError(MixerError error) override;
void FinalizeAudioPlayback() override;
DirectAudioSource* const source_;
const int num_channels_;
const int input_samples_per_second_;
const bool primary_;
const std::string device_id_;
const AudioContentType content_type_;
const int playout_channel_;
StreamMixer* const mixer_;
std::vector<float*> channel_vector_;
} // namespace media
} // namespace chromecast