Aegisub/aegisub/libmedia/audio/convert.h

// Copyright (c) 2008, Rodrigo Braz Monteiro
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
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//     this list of conditions and the following disclaimer.
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// Aegisub Project http://www.aegisub.org/
//
// $Id$

/// @file audio_provider_convert.h
/// @see audio_provider_convert.cpp
/// @ingroup audio_input
///

#include "libmedia/audio.h"

#ifndef AGI_PRE
#include <tr1/memory>
#endif

namespace media {

/// DOCME
/// @class ConvertAudioProvider
/// @brief DOCME
///
/// DOCME
class ConvertAudioProvider : public AudioProvider {
	/// DOCME
	int sampleMult;

	/// DOCME
	std::tr1::shared_ptr<AudioProvider> source;
	void Make16Bit(const char *src, short *dst, int64_t count) const;
	template<class SampleConverter>
	void ChangeSampleRate(const short *src, short *dst, int64_t count, const SampleConverter &converter) const;

public:
	ConvertAudioProvider(AudioProvider *source);

	/// By its nature, the ConvertAudioProvider always delivers machine endian.
	/// That's one of the points of it!
	bool AreSamplesNativeEndian() const { return true; }

	void GetAudio(void *buf, int64_t start, int64_t count) const;

	std::string GetFilename() const { return source->GetFilename(); }
};

AudioProvider *CreateConvertAudioProvider(AudioProvider *source_provider);

} // namespace