winamp/Src/external_dependencies/openmpt-trunk/tracklib/SampleEdit.h

/*
 * SampleEdit.h
 * ------------
 * Purpose: Basic sample editing code (resizing, adding silence, normalizing, ...).
 * 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 "FadeLaws.h"
#include "../soundlib/Snd_defs.h"

OPENMPT_NAMESPACE_BEGIN

class CSoundFile;
struct ModSample;
struct ModChannel;

namespace SampleEdit
{

enum ResetFlag
{
	SmpResetCompo,
	SmpResetInit,
	SmpResetVibrato,
};

// Get a reference to all cue and loop points of the sample
std::vector<std::reference_wrapper<SmpLength>> GetCuesAndLoops(ModSample &smp);


// Insert silence to given location.
// Note: Is currently implemented only for inserting silence to the beginning and to the end of the sample.
// Return: Length of the new sample.
SmpLength InsertSilence(ModSample &smp, const SmpLength silenceLength, const SmpLength startFrom, CSoundFile &sndFile);

// Remove part of a sample [selStart, selEnd[.
// Note: Removed memory is not freed.
// Return: Length of the new sample.
SmpLength RemoveRange(ModSample &smp, SmpLength selStart, SmpLength selEnd, CSoundFile &sndFile);

// Change sample size.
// Note: If resized sample is bigger, silence will be added to the sample's tail.
// Return: Length of the new sample.
SmpLength ResizeSample(ModSample &smp, const SmpLength newLength, CSoundFile &sndFile);

// Resets samples.
void ResetSamples(CSoundFile &sndFile, ResetFlag resetflag, SAMPLEINDEX minSample = SAMPLEINDEX_INVALID, SAMPLEINDEX maxSample = SAMPLEINDEX_INVALID);

// Remove DC offset and normalize.
// Return: If DC offset was removed, returns original offset value, zero otherwise.
double RemoveDCOffset(ModSample &smp, SmpLength start, SmpLength end, CSoundFile &sndFile);

// Amplify / fade  sample data
bool AmplifySample(ModSample &smp, SmpLength start, SmpLength end, double amplifyStart, double amplifyEnd, bool isFadeIn, Fade::Law fadeLaw, CSoundFile &sndFile);

// Reverse sample data
bool ReverseSample(ModSample &smp, SmpLength start, SmpLength end, CSoundFile &sndFile);

// Virtually unsign sample data
bool UnsignSample(ModSample &smp, SmpLength start, SmpLength end, CSoundFile &sndFile);

// Invert sample data (flip by 180 degrees)
bool InvertSample(ModSample &smp, SmpLength start, SmpLength end, CSoundFile &sndFile);

// Crossfade sample data to create smooth loops
bool XFadeSample(ModSample &smp, SmpLength fadeLength, int fadeLaw, bool afterloopFade, bool useSustainLoop, CSoundFile &sndFile);

// Silence parts of the sample data
bool SilenceSample(ModSample &smp, SmpLength start, SmpLength end, CSoundFile &sndFile);

// Modify stereo separation of the sample data. separation is in range [-200, 200]
bool StereoSepSample(ModSample &smp, SmpLength start, SmpLength end, double separation, CSoundFile &sndFile);

// Convert 16-bit sample to 8-bit
bool ConvertTo8Bit(ModSample &smp, CSoundFile &sndFile);

// Convert 8-bit sample to 16-bit
bool ConvertTo16Bit(ModSample &smp, CSoundFile &sndFile);

// Convert ping-pong loops to regular loops
bool ConvertPingPongLoop(ModSample &smp, CSoundFile &sndFile, bool sustainLoop);

} // namespace SampleEdit

OPENMPT_NAMESPACE_END