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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_AUDIO_IO_CALLBACK_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_AUDIO_IO_CALLBACK_H_
#include "base/time/time.h"
#include "third_party/blink/renderer/platform/audio/audio_callback_metric_reporter.h"
namespace media {
struct AudioGlitchInfo;
}
namespace blink {
class AudioBus;
struct AudioIOPosition {
// Audio stream position in seconds.
double position;
// System timestamp in seconds corresponding to the contained |position|
// value.
double timestamp;
// The audio hardware output latency reported by the infrastructure.
double hardware_output_latency;
};
// Abstract base-class for isochronous audio I/O client.
class AudioIOCallback {
public:
virtual ~AudioIOCallback() = default;
// Called periodically to get the next render quantum of audio into
// |destination_bus|.
virtual void Render(AudioBus* destination_bus,
uint32_t frames_to_process,
const AudioIOPosition& output_position,
const AudioCallbackMetric& metric,
base::TimeDelta playout_delay,
const media::AudioGlitchInfo& glitch_info) = 0;
// Called when an error occurs in the underlying audio stack.
// (e.g. bad hardware parameters, or an error while rendering)
virtual void OnRenderError() = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_AUDIO_IO_CALLBACK_H_
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