Aegisub/aegisub/libmedia/audio/convert.h

76 lines
2.6 KiB
C++

// Copyright (c) 2008, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of the Aegisub Group 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT OWNER OR 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.
//
// 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