winamp/Src/external_dependencies/openmpt-trunk/soundlib/pattern.h

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2024-09-24 12:54:57 +00:00
/*
* Pattern.h
* ---------
* Purpose: Module Pattern header class
* 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 <vector>
#include "modcommand.h"
#include "Snd_defs.h"
OPENMPT_NAMESPACE_BEGIN
class CPatternContainer;
class CSoundFile;
class EffectWriter;
typedef ModCommand* PatternRow;
class CPattern
{
friend class CPatternContainer;
public:
CPattern& operator= (const CPattern &pat);
bool operator== (const CPattern &other) const;
bool operator!= (const CPattern &other) const { return !(*this == other); }
public:
ModCommand* GetpModCommand(const ROWINDEX r, const CHANNELINDEX c) { return &m_ModCommands[r * GetNumChannels() + c]; }
const ModCommand* GetpModCommand(const ROWINDEX r, const CHANNELINDEX c) const { return &m_ModCommands[r * GetNumChannels() + c]; }
ROWINDEX GetNumRows() const { return m_Rows; }
ROWINDEX GetRowsPerBeat() const { return m_RowsPerBeat; } // pattern-specific rows per beat
ROWINDEX GetRowsPerMeasure() const { return m_RowsPerMeasure; } // pattern-specific rows per measure
bool GetOverrideSignature() const { return (m_RowsPerBeat + m_RowsPerMeasure > 0); } // override song time signature?
// Returns true if pattern data can be accessed at given row, false otherwise.
bool IsValidRow(const ROWINDEX row) const { return (row < GetNumRows()); }
// Returns true if any pattern data is present.
bool IsValid() const { return !m_ModCommands.empty(); }
// Return PatternRow object which has operator[] defined so that ModCommand
// at (iRow, iChn) can be accessed with GetRow(iRow)[iChn].
PatternRow GetRow(const ROWINDEX row) { return GetpModCommand(row, 0); }
PatternRow GetRow(const ROWINDEX row) const { return const_cast<ModCommand *>(GetpModCommand(row, 0)); }
CHANNELINDEX GetNumChannels() const;
// Add or remove rows from the pattern.
bool Resize(const ROWINDEX newRowCount, bool enforceFormatLimits = true, bool resizeAtEnd = true);
// Check if there is any note data on a given row.
bool IsEmptyRow(ROWINDEX row) const;
// Allocate new pattern memory and replace old pattern data.
bool AllocatePattern(ROWINDEX rows);
// Deallocate pattern data.
void Deallocate();
// Removes all modcommands from the pattern.
void ClearCommands();
// Returns associated soundfile.
CSoundFile& GetSoundFile();
const CSoundFile& GetSoundFile() const;
const std::vector<ModCommand> &GetData() const { return m_ModCommands; }
void SetData(std::vector<ModCommand> &&data) { MPT_ASSERT(data.size() == GetNumRows() * GetNumChannels()); m_ModCommands = std::move(data); }
// Set pattern signature (rows per beat, rows per measure). Returns true on success.
bool SetSignature(const ROWINDEX rowsPerBeat, const ROWINDEX rowsPerMeasure);
void RemoveSignature() { m_RowsPerBeat = m_RowsPerMeasure = 0; }
bool HasTempoSwing() const { return !m_tempoSwing.empty(); }
const TempoSwing& GetTempoSwing() const { return m_tempoSwing; }
void SetTempoSwing(const TempoSwing &swing) { m_tempoSwing = swing; m_tempoSwing.Normalize(); }
void RemoveTempoSwing() { m_tempoSwing.clear(); }
// Pattern name functions - bool functions return true on success.
bool SetName(const std::string &newName);
bool SetName(const char *newName, size_t maxChars);
template<size_t bufferSize>
bool SetName(const char (&buffer)[bufferSize])
{
return SetName(buffer, bufferSize);
}
std::string GetName() const { return m_PatternName; }
#ifdef MODPLUG_TRACKER
// Double number of rows
bool Expand();
// Halve number of rows
bool Shrink();
#endif // MODPLUG_TRACKER
// Write some kind of effect data to the pattern
bool WriteEffect(EffectWriter &settings);
typedef std::vector<ModCommand>::iterator iterator;
typedef std::vector<ModCommand>::const_iterator const_iterator;
iterator begin() { return m_ModCommands.begin(); }
const_iterator begin() const { return m_ModCommands.begin(); }
const_iterator cbegin() const { return m_ModCommands.cbegin(); }
iterator end() { return m_ModCommands.end(); }
const_iterator end() const { return m_ModCommands.end(); }
const_iterator cend() const { return m_ModCommands.cend(); }
CPattern(CPatternContainer& patCont) : m_rPatternContainer(patCont) {}
CPattern(const CPattern &) = default;
CPattern(CPattern &&) noexcept = default;
protected:
ModCommand& GetModCommand(size_t i) { return m_ModCommands[i]; }
//Returns modcommand from (floor[i/channelCount], i%channelCount)
ModCommand& GetModCommand(ROWINDEX r, CHANNELINDEX c) { return m_ModCommands[r * GetNumChannels() + c]; }
const ModCommand& GetModCommand(ROWINDEX r, CHANNELINDEX c) const { return m_ModCommands[r * GetNumChannels() + c]; }
protected:
std::vector<ModCommand> m_ModCommands;
ROWINDEX m_Rows = 0;
ROWINDEX m_RowsPerBeat = 0; // patterns-specific time signature. if != 0, this is implicitely set.
ROWINDEX m_RowsPerMeasure = 0; // ditto
TempoSwing m_tempoSwing;
std::string m_PatternName;
CPatternContainer& m_rPatternContainer;
};
const char FileIdPattern[] = "mptP";
void ReadModPattern(std::istream& iStrm, CPattern& patc, const size_t nSize = 0);
void WriteModPattern(std::ostream& oStrm, const CPattern& patc);
// Class for conveniently writing an effect to the pattern.
class EffectWriter
{
friend class CPattern;
// Row advance mode
enum RetryMode
{
rmIgnore, // If effect can't be written, abort.
rmTryNextRow, // If effect can't be written, try next row.
rmTryPreviousRow, // If effect can't be written, try previous row.
};
public:
// Constructors with effect commands
EffectWriter(EffectCommand cmd, ModCommand::PARAM param) : m_command(cmd), m_param(param), m_isVolEffect(false) { Init(); }
EffectWriter(VolumeCommand cmd, ModCommand::VOL param) : m_volcmd(cmd), m_vol(param), m_isVolEffect(true) { Init(); }
// Additional constructors:
// Set row in which writing should start
EffectWriter &Row(ROWINDEX row) { m_row = row; return *this; }
// Set channel to which writing should be restricted to
EffectWriter &Channel(CHANNELINDEX chn) { m_channel = chn; return *this; }
// Allow multiple effects of the same kind to be written in the same row.
EffectWriter &AllowMultiple() { m_allowMultiple = true; return *this; }
// Set retry mode.
EffectWriter &RetryNextRow() { m_retryMode = rmTryNextRow; return *this; }
EffectWriter &RetryPreviousRow() { m_retryMode = rmTryPreviousRow; return *this; }
protected:
RetryMode m_retryMode;
ROWINDEX m_row;
CHANNELINDEX m_channel;
union
{
EffectCommand m_command;
VolumeCommand m_volcmd;
};
union
{
ModCommand::PARAM m_param;
ModCommand::VOL m_vol;
};
bool m_retry : 1;
bool m_allowMultiple : 1;
bool m_isVolEffect : 1;
// Common data initialisation
void Init()
{
m_row = 0;
m_channel = CHANNELINDEX_INVALID; // Any channel
m_retryMode = rmIgnore; // If effect couldn't be written, abort.
m_retry = true;
m_allowMultiple = false; // Stop if same type of effect is encountered
}
};
OPENMPT_NAMESPACE_END