668 lines
17 KiB
C++
668 lines
17 KiB
C++
/*
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* Load_imf.cpp
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* ------------
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* Purpose: IMF (Imago Orpheus) module loader
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* Notes : Reverb and Chorus are not supported.
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* Authors: Storlek (Original author - http://schismtracker.org/ - code ported with permission)
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* Johannes Schultz (OpenMPT Port, tweaks)
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#include "stdafx.h"
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#include "Loaders.h"
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OPENMPT_NAMESPACE_BEGIN
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struct IMFChannel
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{
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char name[12]; // Channel name (ASCIIZ-String, max 11 chars)
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uint8 chorus; // Default chorus
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uint8 reverb; // Default reverb
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uint8 panning; // Pan positions 00-FF
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uint8 status; // Channel status: 0 = enabled, 1 = mute, 2 = disabled (ignore effects!)
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};
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MPT_BINARY_STRUCT(IMFChannel, 16)
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struct IMFFileHeader
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{
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enum SongFlags
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{
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linearSlides = 0x01,
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};
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char title[32]; // Songname (ASCIIZ-String, max. 31 chars)
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uint16le ordNum; // Number of orders saved
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uint16le patNum; // Number of patterns saved
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uint16le insNum; // Number of instruments saved
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uint16le flags; // See SongFlags
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uint8le unused1[8];
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uint8le tempo; // Default tempo (Axx, 1...255)
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uint8le bpm; // Default beats per minute (BPM) (Txx, 32...255)
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uint8le master; // Default master volume (Vxx, 0...64)
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uint8le amp; // Amplification factor (mixing volume, 4...127)
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uint8le unused2[8];
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char im10[4]; // 'IM10'
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IMFChannel channels[32]; // Channel settings
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};
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MPT_BINARY_STRUCT(IMFFileHeader, 576)
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struct IMFEnvelope
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{
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enum EnvFlags
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{
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envEnabled = 0x01,
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envSustain = 0x02,
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envLoop = 0x04,
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};
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uint8 points; // Number of envelope points
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uint8 sustain; // Envelope sustain point
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uint8 loopStart; // Envelope loop start point
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uint8 loopEnd; // Envelope loop end point
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uint8 flags; // See EnvFlags
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uint8 unused[3];
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};
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MPT_BINARY_STRUCT(IMFEnvelope, 8)
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struct IMFEnvNode
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{
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uint16le tick;
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uint16le value;
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};
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MPT_BINARY_STRUCT(IMFEnvNode, 4)
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struct IMFInstrument
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{
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enum EnvTypes
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{
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volEnv = 0,
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panEnv = 1,
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filterEnv = 2,
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};
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char name[32]; // Inst. name (ASCIIZ-String, max. 31 chars)
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uint8le map[120]; // Multisample settings
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uint8le unused[8];
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IMFEnvNode nodes[3][16];
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IMFEnvelope env[3];
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uint16le fadeout; // Fadeout rate (0...0FFFH)
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uint16le smpNum; // Number of samples in instrument
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char ii10[4]; // 'II10' (not verified by Orpheus)
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void ConvertEnvelope(InstrumentEnvelope &mptEnv, EnvTypes e) const
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{
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const uint8 shift = (e == volEnv) ? 0 : 2;
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const uint8 mirror = (e == filterEnv) ? 0xFF : 0x00;
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mptEnv.dwFlags.set(ENV_ENABLED, (env[e].flags & 1) != 0);
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mptEnv.dwFlags.set(ENV_SUSTAIN, (env[e].flags & 2) != 0);
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mptEnv.dwFlags.set(ENV_LOOP, (env[e].flags & 4) != 0);
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mptEnv.resize(Clamp(env[e].points, uint8(2), uint8(16)));
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mptEnv.nLoopStart = env[e].loopStart;
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mptEnv.nLoopEnd = env[e].loopEnd;
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mptEnv.nSustainStart = mptEnv.nSustainEnd = env[e].sustain;
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uint16 minTick = 0; // minimum tick value for next node
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for(uint32 n = 0; n < mptEnv.size(); n++)
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{
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mptEnv[n].tick = minTick = std::max(minTick, nodes[e][n].tick.get());
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minTick++;
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uint8 value = static_cast<uint8>(nodes[e][n].value ^ mirror) >> shift;
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mptEnv[n].value = std::min(value, uint8(ENVELOPE_MAX));
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}
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mptEnv.Convert(MOD_TYPE_XM, MOD_TYPE_IT);
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}
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// Convert an IMFInstrument to OpenMPT's internal instrument representation.
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void ConvertToMPT(ModInstrument &mptIns, SAMPLEINDEX firstSample) const
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{
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mptIns.name = mpt::String::ReadBuf(mpt::String::nullTerminated, name);
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if(smpNum)
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{
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for(size_t note = 0; note < std::min(std::size(map), std::size(mptIns.Keyboard) - 12u); note++)
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{
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mptIns.Keyboard[note + 12] = firstSample + map[note];
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}
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}
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mptIns.nFadeOut = fadeout;
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mptIns.midiPWD = 1; // For CMD_FINETUNE
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ConvertEnvelope(mptIns.VolEnv, volEnv);
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ConvertEnvelope(mptIns.PanEnv, panEnv);
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ConvertEnvelope(mptIns.PitchEnv, filterEnv);
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if(mptIns.PitchEnv.dwFlags[ENV_ENABLED])
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mptIns.PitchEnv.dwFlags.set(ENV_FILTER);
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// hack to get === to stop notes
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if(!mptIns.VolEnv.dwFlags[ENV_ENABLED] && !mptIns.nFadeOut)
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mptIns.nFadeOut = 32767;
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}
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};
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MPT_BINARY_STRUCT(IMFInstrument, 384)
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struct IMFSample
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{
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enum SampleFlags
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{
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smpLoop = 0x01,
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smpPingPongLoop = 0x02,
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smp16Bit = 0x04,
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smpPanning = 0x08,
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};
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char filename[13]; // Sample filename (12345678.ABC) */
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uint8le unused1[3];
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uint32le length; // Length (in bytes)
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uint32le loopStart; // Loop start (in bytes)
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uint32le loopEnd; // Loop end (in bytes)
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uint32le c5Speed; // Samplerate
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uint8le volume; // Default volume (0...64)
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uint8le panning; // Default pan (0...255)
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uint8le unused2[14];
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uint8le flags; // Sample flags
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uint8le unused3[5];
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uint16le ems; // Reserved for internal usage
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uint32le dram; // Reserved for internal usage
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char is10[4]; // 'IS10'
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// Convert an IMFSample to OpenMPT's internal sample representation.
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void ConvertToMPT(ModSample &mptSmp) const
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{
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mptSmp.Initialize();
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mptSmp.filename = mpt::String::ReadBuf(mpt::String::nullTerminated, filename);
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mptSmp.nLength = length;
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mptSmp.nLoopStart = loopStart;
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mptSmp.nLoopEnd = loopEnd;
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mptSmp.nC5Speed = c5Speed;
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mptSmp.nVolume = volume * 4;
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mptSmp.nPan = panning;
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if(flags & smpLoop)
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mptSmp.uFlags.set(CHN_LOOP);
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if(flags & smpPingPongLoop)
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mptSmp.uFlags.set(CHN_PINGPONGLOOP);
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if(flags & smp16Bit)
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{
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mptSmp.uFlags.set(CHN_16BIT);
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mptSmp.nLength /= 2;
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mptSmp.nLoopStart /= 2;
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mptSmp.nLoopEnd /= 2;
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}
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if(flags & smpPanning)
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mptSmp.uFlags.set(CHN_PANNING);
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}
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};
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MPT_BINARY_STRUCT(IMFSample, 64)
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static constexpr EffectCommand imfEffects[] =
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{
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CMD_NONE,
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CMD_SPEED, // 0x01 1xx Set Tempo
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CMD_TEMPO, // 0x02 2xx Set BPM
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CMD_TONEPORTAMENTO, // 0x03 3xx Tone Portamento
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CMD_TONEPORTAVOL, // 0x04 4xy Tone Portamento + Volume Slide
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CMD_VIBRATO, // 0x05 5xy Vibrato
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CMD_VIBRATOVOL, // 0x06 6xy Vibrato + Volume Slide
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CMD_FINEVIBRATO, // 0x07 7xy Fine Vibrato
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CMD_TREMOLO, // 0x08 8xy Tremolo
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CMD_ARPEGGIO, // 0x09 9xy Arpeggio
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CMD_PANNING8, // 0x0A Axx Set Pan Position
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CMD_PANNINGSLIDE, // 0x0B Bxy Pan Slide
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CMD_VOLUME, // 0x0C Cxx Set Volume
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CMD_VOLUMESLIDE, // 0x0D Dxy Volume Slide
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CMD_VOLUMESLIDE, // 0x0E Exy Fine Volume Slide
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CMD_FINETUNE, // 0x0F Fxx Set Finetune
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CMD_NOTESLIDEUP, // 0x10 Gxy Note Slide Up
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CMD_NOTESLIDEDOWN, // 0x11 Hxy Note Slide Down
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CMD_PORTAMENTOUP, // 0x12 Ixx Slide Up
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CMD_PORTAMENTODOWN, // 0x13 Jxx Slide Down
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CMD_PORTAMENTOUP, // 0x14 Kxx Fine Slide Up
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CMD_PORTAMENTODOWN, // 0x15 Lxx Fine Slide Down
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CMD_MIDI, // 0x16 Mxx Set Filter Cutoff
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CMD_MIDI, // 0x17 Nxy Filter Slide + Resonance
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CMD_OFFSET, // 0x18 Oxx Set Sample Offset
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CMD_NONE, // 0x19 Pxx Set Fine Sample Offset - XXX
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CMD_KEYOFF, // 0x1A Qxx Key Off
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CMD_RETRIG, // 0x1B Rxy Retrig
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CMD_TREMOR, // 0x1C Sxy Tremor
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CMD_POSITIONJUMP, // 0x1D Txx Position Jump
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CMD_PATTERNBREAK, // 0x1E Uxx Pattern Break
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CMD_GLOBALVOLUME, // 0x1F Vxx Set Mastervolume
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CMD_GLOBALVOLSLIDE, // 0x20 Wxy Mastervolume Slide
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CMD_S3MCMDEX, // 0x21 Xxx Extended Effect
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// X1x Set Filter
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// X3x Glissando
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// X5x Vibrato Waveform
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// X8x Tremolo Waveform
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// XAx Pattern Loop
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// XBx Pattern Delay
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// XCx Note Cut
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// XDx Note Delay
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// XEx Ignore Envelope
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// XFx Invert Loop
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CMD_NONE, // 0x22 Yxx Chorus - XXX
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CMD_NONE, // 0x23 Zxx Reverb - XXX
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};
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static void ImportIMFEffect(ModCommand &m)
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{
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uint8 n;
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// fix some of them
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switch(m.command)
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{
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case 0xE: // fine volslide
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// hackaround to get almost-right behavior for fine slides (i think!)
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if(m.param == 0)
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/* nothing */;
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else if(m.param == 0xF0)
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m.param = 0xEF;
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else if(m.param == 0x0F)
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m.param = 0xFE;
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else if(m.param & 0xF0)
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m.param |= 0x0F;
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else
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m.param |= 0xF0;
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break;
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case 0xF: // set finetune
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m.param ^= 0x80;
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break;
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case 0x14: // fine slide up
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case 0x15: // fine slide down
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// this is about as close as we can do...
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if(m.param >> 4)
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m.param = 0xF0 | (m.param >> 4);
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else
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m.param |= 0xE0;
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break;
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case 0x16: // cutoff
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m.param = (0xFF - m.param) / 2u;
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break;
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case 0x17: // cutoff slide + resonance (TODO: cutoff slide is currently not handled)
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m.param = 0x80 | (m.param & 0x0F);
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break;
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case 0x1F: // set global volume
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m.param = mpt::saturate_cast<uint8>(m.param * 2);
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break;
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case 0x21:
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n = 0;
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switch (m.param >> 4)
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{
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case 0:
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/* undefined, but since S0x does nothing in IT anyway, we won't care.
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this is here to allow S00 to pick up the previous value (assuming IMF
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even does that -- I haven't actually tried it) */
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break;
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default: // undefined
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case 0x1: // set filter
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case 0xF: // invert loop
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m.command = CMD_NONE;
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break;
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case 0x3: // glissando
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n = 0x20;
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break;
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case 0x5: // vibrato waveform
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n = 0x30;
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break;
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case 0x8: // tremolo waveform
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n = 0x40;
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break;
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case 0xA: // pattern loop
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n = 0xB0;
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break;
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case 0xB: // pattern delay
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n = 0xE0;
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break;
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case 0xC: // note cut
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case 0xD: // note delay
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// Apparently, Imago Orpheus doesn't cut samples on tick 0.
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if(!m.param)
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m.command = CMD_NONE;
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break;
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case 0xE: // ignore envelope
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switch(m.param & 0x0F)
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{
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// All envelopes
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// Predicament: we can only disable one envelope at a time. Volume is probably most noticeable, so let's go with that.
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case 0: m.param = 0x77; break;
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// Volume
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case 1: m.param = 0x77; break;
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// Panning
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case 2: m.param = 0x79; break;
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// Filter
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case 3: m.param = 0x7B; break;
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}
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break;
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case 0x18: // sample offset
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// O00 doesn't pick up the previous value
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if(!m.param)
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m.command = CMD_NONE;
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break;
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}
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if(n)
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m.param = n | (m.param & 0x0F);
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break;
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}
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m.command = (m.command < std::size(imfEffects)) ? imfEffects[m.command] : CMD_NONE;
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if(m.command == CMD_VOLUME && m.volcmd == VOLCMD_NONE)
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{
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m.volcmd = VOLCMD_VOLUME;
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m.vol = m.param;
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m.command = CMD_NONE;
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m.param = 0;
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}
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}
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static bool ValidateHeader(const IMFFileHeader &fileHeader)
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{
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if(std::memcmp(fileHeader.im10, "IM10", 4)
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|| fileHeader.ordNum > 256
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|| fileHeader.insNum >= MAX_INSTRUMENTS
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|| fileHeader.bpm < 32
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|| fileHeader.master > 64
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|| fileHeader.amp < 4
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|| fileHeader.amp > 127)
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{
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return false;
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}
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bool channelFound = false;
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for(const auto &chn : fileHeader.channels)
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{
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switch(chn.status)
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{
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case 0: // enabled; don't worry about it
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channelFound = true;
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break;
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case 1: // mute
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channelFound = true;
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break;
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case 2: // disabled
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// nothing
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break;
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default: // uhhhh.... freak out
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return false;
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}
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}
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if(!channelFound)
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{
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return false;
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}
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return true;
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}
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static uint64 GetHeaderMinimumAdditionalSize(const IMFFileHeader &fileHeader)
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{
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return 256 + fileHeader.patNum * 4 + fileHeader.insNum * sizeof(IMFInstrument);
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}
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CSoundFile::ProbeResult CSoundFile::ProbeFileHeaderIMF(MemoryFileReader file, const uint64 *pfilesize)
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{
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IMFFileHeader fileHeader;
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if(!file.ReadStruct(fileHeader))
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{
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return ProbeWantMoreData;
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}
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if(!ValidateHeader(fileHeader))
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{
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return ProbeFailure;
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}
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return ProbeAdditionalSize(file, pfilesize, GetHeaderMinimumAdditionalSize(fileHeader));
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}
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bool CSoundFile::ReadIMF(FileReader &file, ModLoadingFlags loadFlags)
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{
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IMFFileHeader fileHeader;
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file.Rewind();
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if(!file.ReadStruct(fileHeader))
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{
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return false;
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}
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if(!ValidateHeader(fileHeader))
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{
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return false;
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}
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if(!file.CanRead(mpt::saturate_cast<FileReader::off_t>(GetHeaderMinimumAdditionalSize(fileHeader))))
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{
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return false;
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}
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if(loadFlags == onlyVerifyHeader)
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{
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return true;
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}
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// Read channel configuration
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std::bitset<32> ignoreChannels; // bit set for each channel that's completely disabled
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uint8 detectedChannels = 0;
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for(uint8 chn = 0; chn < 32; chn++)
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{
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ChnSettings[chn].Reset();
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ChnSettings[chn].nPan = fileHeader.channels[chn].panning * 256 / 255;
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ChnSettings[chn].szName = mpt::String::ReadBuf(mpt::String::nullTerminated, fileHeader.channels[chn].name);
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// TODO: reverb/chorus?
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switch(fileHeader.channels[chn].status)
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{
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case 0: // enabled; don't worry about it
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detectedChannels = chn + 1;
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break;
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case 1: // mute
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ChnSettings[chn].dwFlags = CHN_MUTE;
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detectedChannels = chn + 1;
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break;
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case 2: // disabled
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ChnSettings[chn].dwFlags = CHN_MUTE;
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ignoreChannels[chn] = true;
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break;
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default: // uhhhh.... freak out
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return false;
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}
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}
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InitializeGlobals(MOD_TYPE_IMF);
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m_nChannels = detectedChannels;
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m_modFormat.formatName = U_("Imago Orpheus");
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m_modFormat.type = U_("imf");
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m_modFormat.charset = mpt::Charset::CP437;
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//From mikmod: work around an Orpheus bug
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if(fileHeader.channels[0].status == 0)
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{
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CHANNELINDEX chn;
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for(chn = 1; chn < 16; chn++)
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if(fileHeader.channels[chn].status != 1)
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break;
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if(chn == 16)
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for(chn = 1; chn < 16; chn++)
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ChnSettings[chn].dwFlags.reset(CHN_MUTE);
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}
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// Song Name
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m_songName = mpt::String::ReadBuf(mpt::String::nullTerminated, fileHeader.title);
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m_SongFlags.set(SONG_LINEARSLIDES, fileHeader.flags & IMFFileHeader::linearSlides);
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m_nDefaultSpeed = fileHeader.tempo;
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m_nDefaultTempo.Set(fileHeader.bpm);
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m_nDefaultGlobalVolume = fileHeader.master * 4u;
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m_nSamplePreAmp = fileHeader.amp;
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m_nInstruments = fileHeader.insNum;
|
|
m_nSamples = 0; // Will be incremented later
|
|
|
|
uint8 orders[256];
|
|
file.ReadArray(orders);
|
|
ReadOrderFromArray(Order(), orders, fileHeader.ordNum, uint16_max, 0xFF);
|
|
|
|
// Read patterns
|
|
if(loadFlags & loadPatternData)
|
|
Patterns.ResizeArray(fileHeader.patNum);
|
|
for(PATTERNINDEX pat = 0; pat < fileHeader.patNum; pat++)
|
|
{
|
|
const uint16 length = file.ReadUint16LE(), numRows = file.ReadUint16LE();
|
|
FileReader patternChunk = file.ReadChunk(length - 4);
|
|
|
|
if(!(loadFlags & loadPatternData) || !Patterns.Insert(pat, numRows))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
ModCommand dummy;
|
|
ROWINDEX row = 0;
|
|
while(row < numRows)
|
|
{
|
|
uint8 mask = patternChunk.ReadUint8();
|
|
if(mask == 0)
|
|
{
|
|
row++;
|
|
continue;
|
|
}
|
|
|
|
uint8 channel = mask & 0x1F;
|
|
ModCommand &m = (channel < GetNumChannels()) ? *Patterns[pat].GetpModCommand(row, channel) : dummy;
|
|
|
|
if(mask & 0x20)
|
|
{
|
|
// Read note/instrument
|
|
const auto [note, instr] = patternChunk.ReadArray<uint8, 2>();
|
|
m.note = note;
|
|
m.instr = instr;
|
|
|
|
if(m.note == 160)
|
|
{
|
|
m.note = NOTE_KEYOFF;
|
|
} else if(m.note == 255)
|
|
{
|
|
m.note = NOTE_NONE;
|
|
} else
|
|
{
|
|
m.note = (m.note >> 4) * 12 + (m.note & 0x0F) + 12 + 1;
|
|
if(!m.IsNoteOrEmpty())
|
|
{
|
|
m.note = NOTE_NONE;
|
|
}
|
|
}
|
|
}
|
|
if((mask & 0xC0) == 0xC0)
|
|
{
|
|
// Read both effects and figure out what to do with them
|
|
const auto [e1c, e1d, e2c, e2d] = patternChunk.ReadArray<uint8, 4>(); // Command 1, Data 1, Command 2, Data 2
|
|
|
|
if(e1c == 0x0C)
|
|
{
|
|
m.vol = std::min(e1d, uint8(0x40));
|
|
m.volcmd = VOLCMD_VOLUME;
|
|
m.command = e2c;
|
|
m.param = e2d;
|
|
} else if(e2c == 0x0C)
|
|
{
|
|
m.vol = std::min(e2d, uint8(0x40));
|
|
m.volcmd = VOLCMD_VOLUME;
|
|
m.command = e1c;
|
|
m.param = e1d;
|
|
} else if(e1c == 0x0A)
|
|
{
|
|
m.vol = e1d * 64 / 255;
|
|
m.volcmd = VOLCMD_PANNING;
|
|
m.command = e2c;
|
|
m.param = e2d;
|
|
} else if(e2c == 0x0A)
|
|
{
|
|
m.vol = e2d * 64 / 255;
|
|
m.volcmd = VOLCMD_PANNING;
|
|
m.command = e1c;
|
|
m.param = e1d;
|
|
} else
|
|
{
|
|
/* check if one of the effects is a 'global' effect
|
|
-- if so, put it in some unused channel instead.
|
|
otherwise pick the most important effect. */
|
|
m.command = e2c;
|
|
m.param = e2d;
|
|
}
|
|
} else if(mask & 0xC0)
|
|
{
|
|
// There's one effect, just stick it in the effect column
|
|
const auto [command, param] = patternChunk.ReadArray<uint8, 2>();
|
|
m.command = command;
|
|
m.param = param;
|
|
}
|
|
if(m.command)
|
|
ImportIMFEffect(m);
|
|
if(ignoreChannels[channel] && m.IsGlobalCommand())
|
|
m.command = CMD_NONE;
|
|
}
|
|
}
|
|
|
|
SAMPLEINDEX firstSample = 1; // first sample index of the current instrument
|
|
|
|
// read instruments
|
|
for(INSTRUMENTINDEX ins = 0; ins < GetNumInstruments(); ins++)
|
|
{
|
|
ModInstrument *instr = AllocateInstrument(ins + 1);
|
|
IMFInstrument instrumentHeader;
|
|
if(!file.ReadStruct(instrumentHeader) || instr == nullptr)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// Orpheus does not check this!
|
|
//if(memcmp(instrumentHeader.ii10, "II10", 4) != 0)
|
|
// return false;
|
|
instrumentHeader.ConvertToMPT(*instr, firstSample);
|
|
|
|
// Read this instrument's samples
|
|
for(SAMPLEINDEX smp = 0; smp < instrumentHeader.smpNum; smp++)
|
|
{
|
|
IMFSample sampleHeader;
|
|
file.ReadStruct(sampleHeader);
|
|
|
|
const SAMPLEINDEX smpID = firstSample + smp;
|
|
if(memcmp(sampleHeader.is10, "IS10", 4) || smpID >= MAX_SAMPLES)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
m_nSamples = smpID;
|
|
ModSample &sample = Samples[smpID];
|
|
|
|
sampleHeader.ConvertToMPT(sample);
|
|
m_szNames[smpID] = sample.filename;
|
|
|
|
if(sampleHeader.length)
|
|
{
|
|
FileReader sampleChunk = file.ReadChunk(sampleHeader.length);
|
|
if(loadFlags & loadSampleData)
|
|
{
|
|
SampleIO(
|
|
sample.uFlags[CHN_16BIT] ? SampleIO::_16bit : SampleIO::_8bit,
|
|
SampleIO::mono,
|
|
SampleIO::littleEndian,
|
|
SampleIO::signedPCM)
|
|
.ReadSample(sample, sampleChunk);
|
|
}
|
|
}
|
|
}
|
|
firstSample += instrumentHeader.smpNum;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
OPENMPT_NAMESPACE_END
|