143 lines
3.8 KiB
C++
143 lines
3.8 KiB
C++
/*
|
|
* AudioReadTarget.h
|
|
* -----------------
|
|
* Purpose: Callback class implementations for audio data read via CSoundFile::Read.
|
|
* Notes : (currently none)
|
|
* Authors: OpenMPT Devs
|
|
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "openmpt/all/BuildSettings.hpp"
|
|
|
|
#include "Sndfile.h"
|
|
#include "mpt/audio/span.hpp"
|
|
#include "openmpt/soundbase/SampleFormat.hpp"
|
|
#include "openmpt/soundbase/CopyMix.hpp"
|
|
#include "openmpt/soundbase/Dither.hpp"
|
|
#include "MixerLoops.h"
|
|
#include "Mixer.h"
|
|
#include "../common/Dither.h"
|
|
|
|
#include <type_traits>
|
|
|
|
|
|
OPENMPT_NAMESPACE_BEGIN
|
|
|
|
|
|
template <typename Taudio_span, typename TDithers = DithersOpenMPT>
|
|
class AudioTargetBuffer
|
|
: public IAudioTarget
|
|
{
|
|
private:
|
|
std::size_t countRendered;
|
|
TDithers &dithers;
|
|
protected:
|
|
Taudio_span outputBuffer;
|
|
public:
|
|
AudioTargetBuffer(Taudio_span buf, TDithers &dithers_)
|
|
: countRendered(0)
|
|
, dithers(dithers_)
|
|
, outputBuffer(buf)
|
|
{
|
|
return;
|
|
}
|
|
std::size_t GetRenderedCount() const { return countRendered; }
|
|
public:
|
|
void Process(mpt::audio_span_interleaved<MixSampleInt> buffer) override
|
|
{
|
|
std::visit(
|
|
[&](auto &ditherInstance)
|
|
{
|
|
ConvertBufferMixInternalFixedToBuffer<MixSampleIntTraits::mix_fractional_bits, false>(mpt::make_audio_span_with_offset(outputBuffer, countRendered), buffer, ditherInstance, buffer.size_channels(), buffer.size_frames());
|
|
},
|
|
dithers.Variant()
|
|
);
|
|
countRendered += buffer.size_frames();
|
|
}
|
|
void Process(mpt::audio_span_interleaved<MixSampleFloat> buffer) override
|
|
{
|
|
std::visit(
|
|
[&](auto &ditherInstance)
|
|
{
|
|
ConvertBufferMixInternalToBuffer<false>(mpt::make_audio_span_with_offset(outputBuffer, countRendered), buffer, ditherInstance, buffer.size_channels(), buffer.size_frames());
|
|
},
|
|
dithers.Variant()
|
|
);
|
|
countRendered += buffer.size_frames();
|
|
}
|
|
};
|
|
|
|
|
|
template <typename Taudio_span, typename TDithers = DithersOpenMPT>
|
|
class AudioTargetBufferWithGain
|
|
: public AudioTargetBuffer<Taudio_span>
|
|
{
|
|
private:
|
|
using Tbase = AudioTargetBuffer<Taudio_span>;
|
|
private:
|
|
const float gainFactor;
|
|
public:
|
|
AudioTargetBufferWithGain(Taudio_span buf, TDithers &dithers, float gainFactor_)
|
|
: Tbase(buf, dithers)
|
|
, gainFactor(gainFactor_)
|
|
{
|
|
return;
|
|
}
|
|
public:
|
|
void Process(mpt::audio_span_interleaved<MixSampleInt> buffer) override
|
|
{
|
|
const std::size_t countRendered_ = Tbase::GetRenderedCount();
|
|
if constexpr(!std::is_floating_point<typename Taudio_span::sample_type>::value)
|
|
{
|
|
int32 gainFactor16_16 = mpt::saturate_round<int32>(gainFactor * (1 << 16));
|
|
if(gainFactor16_16 != (1<<16))
|
|
{
|
|
// only apply gain when != +/- 0dB
|
|
// no clipping prevention is done here
|
|
for(std::size_t frame = 0; frame < buffer.size_frames(); ++frame)
|
|
{
|
|
for(std::size_t channel = 0; channel < buffer.size_channels(); ++channel)
|
|
{
|
|
buffer(channel, frame) = Util::muldiv(buffer(channel, frame), gainFactor16_16, 1 << 16);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Tbase::Process(buffer);
|
|
if constexpr(std::is_floating_point<typename Taudio_span::sample_type>::value)
|
|
{
|
|
if(gainFactor != 1.0f)
|
|
{
|
|
// only apply gain when != +/- 0dB
|
|
for(std::size_t frame = 0; frame < buffer.size_frames(); ++frame)
|
|
{
|
|
for(std::size_t channel = 0; channel < buffer.size_channels(); ++channel)
|
|
{
|
|
Tbase::outputBuffer(channel, countRendered_ + frame) *= gainFactor;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
void Process(mpt::audio_span_interleaved<MixSampleFloat> buffer) override
|
|
{
|
|
if(gainFactor != 1.0f)
|
|
{
|
|
// only apply gain when != +/- 0dB
|
|
for(std::size_t frame = 0; frame < buffer.size_frames(); ++frame)
|
|
{
|
|
for(std::size_t channel = 0; channel < buffer.size_channels(); ++channel)
|
|
{
|
|
buffer(channel, frame) *= gainFactor;
|
|
}
|
|
}
|
|
}
|
|
Tbase::Process(buffer);
|
|
}
|
|
};
|
|
|
|
|
|
OPENMPT_NAMESPACE_END
|