chromium/services/audio/sync_mixing_graph_input.cc

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "services/audio/sync_mixing_graph_input.h"

#include "base/trace_event/trace_event.h"
#include "media/base/audio_pull_fifo.h"
#include "media/base/audio_timestamp_helper.h"

namespace audio {

SyncMixingGraphInput::SyncMixingGraphInput(MixingGraph* graph,
                                           const media::AudioParameters& params)
    : … { … }

SyncMixingGraphInput::~SyncMixingGraphInput() { … }

// Either calls Render() directly to produce the requested input audio, or - in
// the case of a frames per buffer mismatch - pulls audio from the |fifo_| which
// in turn calls Render() as needed.
double SyncMixingGraphInput::ProvideInput(
    media::AudioBus* audio_bus,
    uint32_t frames_delayed,
    const media::AudioGlitchInfo& glitch_info) { … }

const media::AudioParameters& SyncMixingGraphInput::GetParams() const { … }

void SyncMixingGraphInput::SetVolume(double volume) { … }

void SyncMixingGraphInput::Start(
    media::AudioOutputStream::AudioSourceCallback* source_callback) { … }

void SyncMixingGraphInput::Stop() { … }

void SyncMixingGraphInput::Render(int fifo_frame_delay,
                                  media::AudioBus* audio_bus) { … }

}  // namespace audio