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/* SPDX-License-Identifier: BSD-3-Clause */
/* SPDX-FileCopyrightText: OpenMPT Project Developers and Contributors */
#pragma once
#include "openmpt/all/BuildSettings.hpp"
#include "SoundDeviceCallback.hpp"
#include "mpt/audio/span.hpp"
#include "openmpt/base/Types.hpp"
#include "openmpt/soundbase/Dither.hpp"
#include "openmpt/soundbase/CopyMix.hpp"
#include <variant>
#include <cassert>
#include <cstddef>
OPENMPT_NAMESPACE_BEGIN
namespace SoundDevice
{
template <typename Tsample>
class BufferIO
{
private:
mpt::audio_span_interleaved<const Tsample> const m_src;
mpt::audio_span_interleaved<Tsample> const m_dst;
std::size_t m_countFramesReadProcessed;
std::size_t m_countFramesWriteProcessed;
const BufferFormat m_bufferFormat;
public:
inline BufferIO(Tsample *dst, const Tsample *src, std::size_t numFrames, BufferFormat bufferFormat)
: m_src(src, bufferFormat.InputChannels, numFrames)
, m_dst(dst, bufferFormat.Channels, numFrames)
, m_countFramesReadProcessed(0)
, m_countFramesWriteProcessed(0)
, m_bufferFormat(bufferFormat)
{
return;
}
template <typename audio_span_dst>
inline void Read(audio_span_dst dst)
{
assert(m_countFramesReadProcessed + dst.size_frames() <= m_src.size_frames());
ConvertBufferToBufferMixInternal(dst, mpt::make_audio_span_with_offset(m_src, m_countFramesReadProcessed), m_bufferFormat.InputChannels, dst.size_frames());
m_countFramesReadProcessed += dst.size_frames();
}
template <int fractionalBits, typename audio_span_dst>
inline void ReadFixedPoint(audio_span_dst dst)
{
assert(m_countFramesReadProcessed + dst.size_frames() <= m_src.size_frames());
ConvertBufferToBufferMixInternalFixed<fractionalBits>(dst, mpt::make_audio_span_with_offset(m_src, m_countFramesReadProcessed), m_bufferFormat.InputChannels, dst.size_frames());
m_countFramesReadProcessed += dst.size_frames();
}
template <typename audio_span_src, typename TDither>
inline void Write(audio_span_src src, TDither &dither)
{
assert(m_countFramesWriteProcessed + src.size_frames() <= m_dst.size_frames());
if(m_bufferFormat.WantsClippedOutput)
{
ConvertBufferMixInternalToBuffer<true>(mpt::make_audio_span_with_offset(m_dst, m_countFramesWriteProcessed), src, dither, m_bufferFormat.Channels, src.size_frames());
} else
{
ConvertBufferMixInternalToBuffer<false>(mpt::make_audio_span_with_offset(m_dst, m_countFramesWriteProcessed), src, dither, m_bufferFormat.Channels, src.size_frames());
}
m_countFramesWriteProcessed += src.size_frames();
}
template <int fractionalBits, typename audio_span_src, typename TDither>
inline void WriteFixedPoint(audio_span_src src, TDither &dither)
{
assert(m_countFramesWriteProcessed + src.size_frames() <= m_dst.size_frames());
if(m_bufferFormat.WantsClippedOutput)
{
ConvertBufferMixInternalFixedToBuffer<fractionalBits, true>(mpt::make_audio_span_with_offset(m_dst, m_countFramesWriteProcessed), src, dither, m_bufferFormat.Channels, src.size_frames());
} else
{
ConvertBufferMixInternalFixedToBuffer<fractionalBits, false>(mpt::make_audio_span_with_offset(m_dst, m_countFramesWriteProcessed), src, dither, m_bufferFormat.Channels, src.size_frames());
}
m_countFramesWriteProcessed += src.size_frames();
}
inline ~BufferIO()
{
// fill remaining buffer with silence
while(m_countFramesWriteProcessed < m_dst.size_frames())
{
for(std::size_t channel = 0; channel < m_dst.size_channels(); ++channel)
{
m_dst(channel, m_countFramesWriteProcessed) = SC::sample_cast<Tsample>(static_cast<int16>(0));
}
m_countFramesWriteProcessed += 1;
}
}
};
template <typename TDithers>
class CallbackBuffer
{
private:
std::variant<
BufferIO<uint8>,
BufferIO<int8>,
BufferIO<int16>,
BufferIO<int24>,
BufferIO<int32>,
BufferIO<float>,
BufferIO<double>>
m_BufferIO;
TDithers &m_Dithers;
std::size_t m_NumFrames;
public:
template <typename Tsample>
explicit inline CallbackBuffer(Tsample *dst, const Tsample *src, std::size_t numFrames, TDithers &dithers, BufferFormat bufferFormat)
: m_BufferIO(BufferIO<Tsample>{dst, src, numFrames, bufferFormat})
, m_Dithers(dithers)
, m_NumFrames(numFrames)
{
return;
}
inline std::size_t GetNumFrames() const
{
return m_NumFrames;
}
template <typename audio_span_dst>
inline void Read(audio_span_dst dst)
{
std::visit(
[&](auto &bufferIO)
{
bufferIO.Read(dst);
},
m_BufferIO);
}
template <int fractionalBits, typename audio_span_dst>
inline void ReadFixedPoint(audio_span_dst dst)
{
std::visit(
[&](auto &bufferIO)
{
bufferIO.template ReadFixedPoint<fractionalBits>(dst);
},
m_BufferIO);
}
template <typename audio_span_src>
inline void Write(audio_span_src src)
{
std::visit(
[&](auto &bufferIO)
{
std::visit(
[&](auto &ditherInstance)
{
bufferIO.Write(src, ditherInstance);
},
m_Dithers.Variant());
},
m_BufferIO);
}
template <int fractionalBits, typename audio_span_src>
inline void WriteFixedPoint(audio_span_src src)
{
std::visit(
[&](auto &bufferIO)
{
std::visit(
[&](auto &ditherInstance)
{
bufferIO.template WriteFixedPoint<fractionalBits>(src, ditherInstance);
},
m_Dithers.Variant());
},
m_BufferIO);
}
};
template <typename TDithers>
class CallbackBufferHandler
: public ICallback
{
private:
TDithers m_Dithers;
protected:
template <typename Trd>
explicit CallbackBufferHandler(Trd &rd)
: m_Dithers(rd)
{
return;
}
protected:
inline TDithers &Dithers()
{
return m_Dithers;
}
private:
template <typename Tsample>
inline void SoundCallbackLockedProcessImpl(BufferFormat bufferFormat, std::size_t numFrames, Tsample *buffer, const Tsample *inputBuffer)
{
CallbackBuffer<TDithers> callbackBuffer{buffer, inputBuffer, numFrames, m_Dithers, bufferFormat};
SoundCallbackLockedCallback(callbackBuffer);
}
public:
inline void SoundCallbackLockedProcess(BufferFormat bufferFormat, std::size_t numFrames, uint8 *buffer, const uint8 *inputBuffer) final
{
SoundCallbackLockedProcessImpl(bufferFormat, numFrames, buffer, inputBuffer);
}
inline void SoundCallbackLockedProcess(BufferFormat bufferFormat, std::size_t numFrames, int8 *buffer, const int8 *inputBuffer) final
{
SoundCallbackLockedProcessImpl(bufferFormat, numFrames, buffer, inputBuffer);
}
inline void SoundCallbackLockedProcess(BufferFormat bufferFormat, std::size_t numFrames, int16 *buffer, const int16 *inputBuffer) final
{
SoundCallbackLockedProcessImpl(bufferFormat, numFrames, buffer, inputBuffer);
}
inline void SoundCallbackLockedProcess(BufferFormat bufferFormat, std::size_t numFrames, int24 *buffer, const int24 *inputBuffer) final
{
SoundCallbackLockedProcessImpl(bufferFormat, numFrames, buffer, inputBuffer);
}
inline void SoundCallbackLockedProcess(BufferFormat bufferFormat, std::size_t numFrames, int32 *buffer, const int32 *inputBuffer) final
{
SoundCallbackLockedProcessImpl(bufferFormat, numFrames, buffer, inputBuffer);
}
inline void SoundCallbackLockedProcess(BufferFormat bufferFormat, std::size_t numFrames, float *buffer, const float *inputBuffer) final
{
SoundCallbackLockedProcessImpl(bufferFormat, numFrames, buffer, inputBuffer);
}
inline void SoundCallbackLockedProcess(BufferFormat bufferFormat, std::size_t numFrames, double *buffer, const double *inputBuffer) final
{
SoundCallbackLockedProcessImpl(bufferFormat, numFrames, buffer, inputBuffer);
}
virtual void SoundCallbackLockedCallback(CallbackBuffer<TDithers> &buffer) = 0;
};
} // namespace SoundDevice
OPENMPT_NAMESPACE_END
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