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/*
* Copyright (C) 2017 Apple 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.
*/
#pragma once
#include <variant>
typedef struct AudioStreamBasicDescription AudioStreamBasicDescription;
namespace WebCore {
struct PlatformDescription {
enum {
None,
CAAudioStreamBasicType,
GStreamerAudioStreamDescription,
} type { None };
std::variant<std::nullptr_t, const AudioStreamBasicDescription*> description;
};
class AudioStreamDescription {
public:
virtual ~AudioStreamDescription() = default;
virtual const PlatformDescription& platformDescription() const = 0;
enum PCMFormat {
None,
Uint8,
Int16,
Int24,
Int32,
Float32,
Float64
};
virtual PCMFormat format() const = 0;
virtual double sampleRate() const = 0;
virtual bool isPCM() const { return format() != None; }
virtual bool isInterleaved() const = 0;
virtual bool isSignedInteger() const = 0;
virtual bool isFloat() const = 0;
virtual bool isNativeEndian() const = 0;
virtual uint32_t numberOfInterleavedChannels() const = 0;
virtual uint32_t numberOfChannelStreams() const = 0;
virtual uint32_t numberOfChannels() const = 0;
virtual uint32_t sampleWordSize() const = 0;
};
}
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