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WaveOutAPI.pas
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{
This is part of Vortex Tracker II project
(c)2000-2009 S.V.Bulba
Author: Sergey Bulba, vorobey@mail.khstu.ru
Support page: http://bulba.untergrund.net/
Version 2.0 and later
(c)2017-2019 Ivan Pirog, ivan.pirog@gmail.com
}
unit WaveOutAPI;
interface
uses Windows, Messages, Dialogs, MMSystem, SysUtils, Forms, trfuncs, Classes,
ExportWav, ayumi;
type
//Digital sound data buffer
TWaveOutBuffer = packed array of byte;
TWaveHeader = record
idRiff: array [0..3] of AnsiChar;
RiffLen: longint;
idWave: array [0..3] of AnsiChar;
idFmt: array [0..3] of AnsiChar;
InfoLen: longint;
WaveType: smallint;
Ch: smallint;
Freq: longint;
BytesPerSec: longint;
align: smallint;
Bits: smallint;
idData: array [0..3] of char;
DataLen: longint;
end;
const
NumberOfBuffersDef = 3;
BufLen_msDef = 100; //726;
WODevice: DWORD = WAVE_MAPPER;
var
NumberOfBuffers, BufferLength, BuffLen, BufLen_ms: integer;
NOfTicks: Cardinal;
IsPlaying: boolean = False;
Reseted: boolean = False;
Interrupt_Freq, NumberOfChannels, SampleRate, SampleBit: integer;
PlayingGrid: array of record
M1, M2: Integer;
end;
PlayGridLen: Cardinal;
MkVisPos: Cardinal;
ResetMutex: THandle;
HWO: HWAVEOUT;
waveOutBuffers: array of record
Buf: TWaveOutBuffer;
WH: WAVEHDR;
end;
LineReady: boolean;
ExportStarted, ExportFinished: Boolean;
ExportLoops: Integer;
procedure InitForAllTypes(All: boolean);
procedure StartWOThread;
procedure WOThreadFinalization;
procedure StopPlaying;
procedure WOCheck(Res: MMRESULT);
procedure ResetAYChipEmulation(chip: integer);
function WOThreadActive: boolean;
procedure ResetPlaying;
procedure UnresetPlaying;
procedure CreateWaveHeader(Length, SampleRate: Integer;
BitsPerSample, Channels: Smallint; var WaveHeader: TWaveHeader);
procedure CreateWaveAyumi(FileName: string);
implementation
uses AY, Childwin, Main, ExportWavOpts;
var
WOEventH: THANDLE;
WOThreadID: DWORD;
WOThreadH: THANDLE = 0;
WOCS: RTL_CRITICAL_SECTION;
TSEventH: THANDLE;
TSThreadID: DWORD;
TSThreadH: THANDLE;
AudioProblem: Boolean;
type
EMultiMediaError = class(Exception);
procedure WOCheck(Res: MMRESULT);
var
ErrMsg: array[0..255] of Char;
begin
if Res <> 0 then
begin
EnterCriticalSection(WOCS);
waveOutGetErrorText(Res, ErrMsg, SizeOf(ErrMsg));
LeaveCriticalSection(WOCS);
raise EMultiMediaError.Create(ErrMsg)
end
end;
function TSThreadFunc(a: pointer): dword; stdcall;
var
CurVisPos, k: DWORD;
MMTIME1: MMTime;
PW1Changed, PW2Changed: Boolean;
begin
while WaitForSingleObject(TSEventH, 0) <> WAIT_OBJECT_0 do
begin
if Reseted then begin
Sleep(2);
Continue;
end;
if IsPlaying and WOThreadActive and (PlayMode in [PMPlayModule, PMPlayPattern]) then begin
MMTIME1.wType := TIME_SAMPLES;
waveOutGetPosition(HWO, @MMTIME1, sizeof(MMTIME1));
k := MMTIME1.Sample div PlayGridLen;
CurVisPos := MMTIME1.Sample - (PlayGridLen * k);
PW1Changed := (
((PlayingGrid[CurVisPos].M1 shr 17) and $1FF <> PlayingWindow[1].Tracks.ShownFrom) or
((PlayingGrid[CurVisPos].M1 shr 9) and $FF <> PlayingWindow[1].PatNum) or
(PlayingGrid[CurVisPos].M1 and $1FF <> PlayingWindow[1].PositionNumber)
);
if PlayingWindow[2] = nil then
PW2Changed := False
else
PW2Changed := (
((PlayingGrid[CurVisPos].M2 shr 17) and $1FF <> PlayingWindow[2].Tracks.ShownFrom) or
((PlayingGrid[CurVisPos].M2 shr 9) and $FF <> PlayingWindow[2].PatNum) or
(PlayingGrid[CurVisPos].M2 and $1FF <> PlayingWindow[2].PositionNumber)
);
//Main.Logger.Add(IntToStr((PlayingGrid[CurVisPos].M1 shr 17) and $1FF));
if PW1Changed or PW2Changed then
PostMessage(MainForm.Handle, UM_REDRAWTRACKS, PlayingGrid[CurVisPos].M1, PlayingGrid[CurVisPos].M2);
Sleep(2);
end
else
Sleep(20)
end;
Result := STILL_ACTIVE - 1;
end;
procedure StartTrackSlider;
begin
TSEventH := CreateEvent(nil, False, False, nil);
TSThreadH := CreateThread(nil, 0, @TSThreadFunc, nil, 0, TSThreadID);
SetThreadPriority(TSThreadH, HIGH_PRIORITY_CLASS);
end;
procedure SkipRedraw;
var
msg: TMsg;
begin
Sleep(0);
if PlayMode in [PMPlayModule, PMPlayPattern] then
PeekMessage(msg, MainForm.Handle, UM_REDRAWTRACKS, UM_REDRAWTRACKS, PM_REMOVE);
end;
procedure StopTrackSlider;
var
ExCode: DWORD;
begin
SetEvent(TSEventH);
repeat
if not GetExitCodeThread(TSThreadH, ExCode) then break;
if ExCode = STILL_ACTIVE then SkipRedraw;
until ExCode <> STILL_ACTIVE;
CloseHandle(TSThreadH);
CloseHandle(TSEventH);
end;
procedure WaitForWOThreadExit;
var
ExCode: DWORD;
begin
if WOThreadH = 0 then exit;
repeat
if not GetExitCodeThread(WOThreadH, ExCode) then break;
if ExCode = STILL_ACTIVE then Sleep(0);
until ExCode <> STILL_ACTIVE;
CloseHandle(WOThreadH);
WOThreadH := 0
end;
procedure StopPlaying;
var
msg: TMsg;
begin
UnlimiteDelay := False;
IsPlaying := False;
if WOThreadActive then
begin
AudioProblem := False;
ResetPlaying;
UnresetPlaying;
SetEvent(WOEventH);
WaitForWOThreadExit;
while not PeekMessage(msg, MainForm.Handle,
UM_FINALIZEWO, UM_FINALIZEWO, PM_REMOVE) do Sleep(0);
WOThreadFinalization
end
end;
function WOThreadFunc(a: pointer): dword; stdcall;
function AllBuffersDone: boolean;
var
i: integer;
begin
Result := False;
for i := 0 to NumberOfBuffers - 1 do
if waveOutBuffers[i].WH.dwFlags and WHDR_DONE = 0 then exit;
Result := True
end;
var
i, j, SampleSize: integer;
mut: boolean;
begin
SampleSize := (SampleBit div 8) * NumberOfChannels;
mut := False;
try
repeat
WaitForSingleObject(ResetMutex, INFINITE);
mut := True;
if not Real_End_All then
begin
for i := 0 to NumberOfBuffers - 1 do
with waveOutBuffers[i] do
begin
if Reseted then break;
if not IsPlaying then break;
if WH.dwFlags and WHDR_DONE <> 0 then
begin
MakeBuffer(WH.lpdata);
if Reseted then break;
if not IsPlaying then break;
if BuffLen = 0 then
begin
if AllBuffersDone then break
end
else
begin
WH.dwBufferLength := BuffLen * SampleSize;
WH.dwFlags := WH.dwFlags and not WHDR_DONE;
EnterCriticalSection(WOCS);
try
WOCheck(waveOutWrite(HWO, @WH, sizeof(WAVEHDR)));
except
// Audio device settings changed
LeaveCriticalSection(WOCS);
IsPlaying := False;
Reseted := False;
ReleaseMutex(ResetMutex);
AudioProblem := True;
WOCheck(waveOutClose(HWO));
Result := 0;
Exit;
end;
LeaveCriticalSection(WOCS);
end
end;
end
end;
if Real_End_All and not Reseted and AllBuffersDone then break;
mut := False;
ReleaseMutex(ResetMutex);
if not IsPlaying then break;
j := WaitForSingleObject(WOEventH, BufLen_ms);
if (j <> WAIT_OBJECT_0) and (j <> WAIT_TIMEOUT) then break
until not IsPlaying
finally
if mut then
ReleaseMutex(ResetMutex);
PostMessage(MainForm.Handle, UM_FINALIZEWO, 0, 0);
Result := STILL_ACTIVE - 1;
UnlimiteDelay := False;
end
end;
procedure StartWOThread;
var
pwfx: pcmwaveformat;
i, bl: integer;
begin
if WOThreadActive then exit;
SetAYFreq(TMDIChild(MainForm.ActiveMDIChild).VTMP.ChipFreq);
SetIntFreq(TMDIChild(MainForm.ActiveMDIChild).VTMP.IntFreq);
ExportStarted := False;
AudioProblem := False;
StartTrackSlider;
with pwfx.wf do
begin
wFormatTag := 1;
nChannels := NumberOfChannels;
nSamplesPerSec := SampleRate;
nBlockAlign := (SampleBit div 8) * NumberOfChannels;
nAvgBytesPerSec := SampleRate * pwfx.wf.nBlockAlign;
end;
pwfx.wBitsPerSample := SampleBit;
try
WOCheck(waveOutOpen(@HWO, WODevice, @pwfx, WOEventH, 0, CALLBACK_EVENT));
except
PostMessage(MainForm.Handle, UM_PLAYINGOFF, 0, 0);
MessageDlg('Can''t play: audio device is busy or not available. Check sound settings.',
mtWarning, [mbOK], 0);
Exit;
end;
WaitForSingleObject(WOEventH, INFINITE);
try
bl := BufferLength * pwfx.wf.nBlockAlign;
for i := 0 to NumberOfBuffers - 1 do
with waveOutBuffers[i] do
begin
SetLength(Buf, bl);
with WH do
begin
lpdata := @Buf[0];
dwBufferLength := bl;
dwFlags := 0;
dwUser := 0;
dwLoops := 0;
end;
WOCheck(waveOutPrepareHeader(HWO, @WH, sizeof(WAVEHDR)));
WH.dwFlags := WH.dwFlags or WHDR_DONE;
end
except
PostMessage(MainForm.Handle, UM_PLAYINGOFF, 0, 0);
MessageDlg('Can''t play: audio device is busy or not available. Check sound settings.',
mtWarning, [mbOK], 0);
//Exit;
WOCheck(waveOutClose(HWO));
Exit;
end;
// Init Ayumi Engine
AyumiChip1 := TAyumi.Create;
AyumiChip1.Configure(Emulating_Chip = YM_Chip, AY_Freq, SampleRate, DCType);
AyumiChip1.SetDCCutoff(DCCutOff);
AyumiChip1.SetPan(0, Panoram[0]/255, False);
AyumiChip1.SetPan(1, Panoram[1]/255, False);
AyumiChip1.SetPan(2, Panoram[2]/255, False);
AyumiChip2 := TAyumi.Create;
AyumiChip2.Configure(Emulating_Chip = YM_Chip, AY_Freq, SampleRate, DCType);
AyumiChip2.SetDCCutoff(DCCutOff);
AyumiChip2.SetPan(0, Panoram[0]/255, False);
AyumiChip2.SetPan(1, Panoram[1]/255, False);
AyumiChip2.SetPan(2, Panoram[2]/255, False);
IsPlaying := True;
Reseted := False;
WOThreadH := CreateThread(nil, 0, @WOThreadFunc, nil, 0, WOThreadID);
end;
procedure WOThreadFinalization;
var
i: integer;
begin
WaitForWOThreadExit;
StopTrackSlider;
AyumiChip1.Free;
AyumiChip2.Free;
AyumiChip1 := nil;
AyumiChip2 := nil;
try
WOCheck(waveOutReset(HWO));
for i := 0 to NumberOfBuffers - 1 do
with waveOutBuffers[i] do
begin
while WH.dwFlags and WHDR_DONE = 0 do Sleep(0);
if WH.dwFlags and WHDR_PREPARED <> 0 then
WOCheck(waveOutUnprepareHeader(HWO, @WH, sizeof(WAVEHDR)));
Buf := nil
end;
WOCheck(waveOutClose(HWO));
except
if AudioProblem then
begin
Application.MessageBox('Audio device settings were changed. Check audio options and try again.',
'Vortex Tracker', MB_OK + MB_ICONWARNING + MB_TOPMOST);
end
else
ShowException(ExceptObject, ExceptAddr);
end;
IsPlaying := False;
Reseted := False;
AudioProblem := False;
end;
procedure ResetAYChipEmulation;
begin
with SoundChip[chip] do
begin
FillChar(AYRegisters, 14, 0);
SetEnvelopeRegister(0);
First_Period := False;
Ampl := 0;
SetMixerRegister(0);
SetAmplA(0);
SetAmplB(0);
SetAmplC(0);
IntFlag := False;
Number_Of_Tiks.Re := 0;
Current_Tik := 0;
Envelope_Counter.Re := 0;
Ton_Counter_A.Re := 0;
Ton_Counter_B.Re := 0;
Ton_Counter_C.Re := 0;
Noise_Counter.Re := 0;
Ton_A := 0;
Ton_B := 0;
Ton_C := 0;
Left_Chan := 0; Right_Chan := 0; Tick_Counter := 0;
Tik.Re := Delay_In_Tiks;
Noise.Seed := $FFFF;
Noise.Val := 0;
end;
if (chip = 1) and (AyumiChip1 <> nil) then
AyumiChip1.ResetChip;
if (chip = 2) and (AyumiChip2 <> nil) then
AyumiChip2.ResetChip;
end;
procedure InitForAllTypes(All: boolean);
var
i: integer;
begin
LineReady := False;
MkVisPos := 0;
NOfTicks := 0;
for i := 1 to NumberOfSoundChips do
begin
ResetAYChipEmulation(i);
Real_End[i] := False;
end;
Real_End_All := False;
if (RenderEngine = 0) and IsFilt then
begin
FillChar(Filt_XL[0], (Filt_M + 1) * 4, 0);
FillChar(Filt_XR[0], (Filt_M + 1) * 4, 0);
Filt_I := 0;
end;
for i := NumberOfSoundChips downto 1 do
begin
Module_SetPointer(PlayingWindow[i].VTMP, i);
InitTrackerParameters(All);
end;
end;
function WOThreadActive;
var
ExCode: DWORD;
begin
Result := (WOThreadH <> 0) and
GetExitCodeThread(WOThreadH, ExCode) and
(ExCode = STILL_ACTIVE);
if not Result then
if WOThreadH <> 0 then
begin
CloseHandle(WOThreadH);
WOThreadH := 0
end
end;
procedure ResetPlaying;
var
i: integer;
begin
if Reseted then exit;
Reseted := True;
UnlimiteDelay := False;
AudioProblem := False;
WaitForSingleObject(ResetMutex, INFINITE);
EnterCriticalSection(WOCS);
WOCheck(waveOutReset(HWO));
LeaveCriticalSection(WOCS);
MkVisPos := 0;
NOfTicks := 0;
for i := 0 to NumberOfBuffers - 1 do
with waveOutBuffers[i] do
while WH.dwFlags and WHDR_DONE = 0 do Sleep(0)
end;
procedure UnresetPlaying;
begin
if Reseted then
begin
AudioProblem := False;
SetEvent(WOEventH);
Reseted := False;
ReleaseMutex(ResetMutex);
end
end;
procedure CreateWaveHeader(Length, SampleRate: Integer;
BitsPerSample, Channels: Smallint; var WaveHeader: TWaveHeader);
begin
if (SampleRate < 1) or (not BitsPerSample in [8, 16, 24, 32]) or (not Channels in [1, 2])
then raise Exception.Create('Wrong params');
//len := SampleCount * BitsPerSample div 8 * Channeles;
with WaveHeader do begin
idRiff := 'RIFF';
RiffLen := Length + 38;
idWave := 'WAVE';
idFmt := 'fmt ';
InfoLen := 16;
WaveType := 1;
Ch := Channels;
Freq := SampleRate;
BytesPerSec := SampleRate * BitsPerSample div 8 * Channels;
align := Channels * BitsPerSample div 8;
Bits := BitsPerSample;
idData := 'data';
DataLen := Length;
end;
end;
{
procedure CreateWave(FileName: string);
var
WaveHeader: TWaveHeader;
AudioBufferSize, i: Integer;
FileStream, TMPFileStream: TFileStream;
Buf: TWaveOutBuffer;
prevSampleRate, prevBitRate, prevNumChans: Integer;
prevOptForQuality, prevLoopAllowed: Boolean;
prevEmulatingChip: ChTypes;
prevVolume: Integer;
ExportModal: TExport;
Chip1Position, Chip2Position: Integer;
TMPFileName: string;
begin
// Save chip & audio params
prevSampleRate := SampleRate;
prevBitRate := SampleBit;
prevNumChans := NumberOfChannels;
prevEmulatingChip := Emulating_Chip;
//prevOptForQuality := Optimization_For_Quality;
prevLoopAllowed := LoopAllowed;
prevVolume := MainForm.TrackBar1.Position;
MainForm.TrackBar1.Position := 58;
PlayMode := PMPlayModule;
if IsPlaying then
StopPlaying;
// Force set active tab to patterns tab
PlayingWindow[1].PageControl1.ActivePageIndex := 0;
if (PlayingWindow[2] <> nil) then PlayingWindow[2].PageControl1.ActivePageIndex := 0;
MainForm.DisableControlsForExport;
// Set chip & audio params for export
MainForm.SetEmulatingChip(ExportOptions.GetChip);
//Set_Optimization(True);
SetSampleRate(ExportOptions.GetSampleRate);
SetBitRate(16);
SetNChans(2);
InitForAllTypes(True);
// Init pointer, position, delay
for i := 1 to NumberOfSoundChips do
begin
Module_SetPointer(PlayingWindow[i].VTMP, i);
Module_SetDelay(PlayingWindow[i].VTMP.Initial_Delay);
Module_SetCurrentPosition(0);
end;
// Set loop repeats
ExportLoops := ExportOptions.GetRepeats;
LoopAllowed := ExportLoops > 0;
// Show export modal
ExportModal := TExport.Create(MainForm);
ExportModal.ExportProgress.Position := 1;
ExportModal.ExportProgress.Step := 1;
ExportModal.ExportProgress.Min := 0;
ExportModal.ExportProgress.Max := PlayingWindow[1].VTMP.Positions.Length +
((PlayingWindow[1].VTMP.Positions.Length - PlayingWindow[1].VTMP.Positions.Loop) * ExportLoops);
ExportModal.Show;
// Prepare memory stream and buffer
TMPFileName := FileName+'.tmp';
TMPFileStream := TFileStream.Create(TMPFileName, fmCreate);
AudioBufferSize := BufferLength * (SampleBit div 8) * NumberOfChannels;
SetLength(Buf, AudioBufferSize);
Chip1Position := 0;
Chip2Position := 0;
i := 0;
ExportStarted := True;
ExportFinished := False;
repeat
// Cancel export by Esc or Application Exit
if MainForm.VTExit or (GetAsyncKeyState(VK_ESCAPE) and $8001 <> 0) then
begin
TMPFileStream.Free;
ExportModal.Free;
DeleteFile(TMPFileName);
MainForm.SetEmulatingChip(prevEmulatingChip);
//Set_Optimization(prevOptForQuality);
SetSampleRate(prevSampleRate);
SetBitRate(prevBitRate);
SetNChans(prevNumChans);
LoopAllowed := prevLoopAllowed;
MainForm.TrackBar1.Position := prevVolume;
ExportStarted := False;
if MainForm.VTExit then
Exit;
MainForm.EnableControlsForExport;
PlayingWindow[1].SelectPosition2(0);
if PlayingWindow[2] <> nil then PlayingWindow[2].SelectPosition2(0);
Exit;
end;
// Reset buffer
FillChar(Buf[0], AudioBufferSize, 0);
// Make buffer and save to memory stream
MakeBuffer(@Buf[0]);
// Save buffer
if BuffLen < BufferLength then
TMPFileStream.Write(Buf[0], BuffLen * (SampleBit div 8) * NumberOfChannels)
else
TMPFileStream.Write(Buf[0], AudioBufferSize);
if ExportFinished then
Break;
// Process messages each 3 loops
Inc(i);
if i = 2 then
begin
Application.ProcessMessages;
i := 0;
end;
// Change positions
if Chip1Position <> PlVars[1].CurrentPosition then
begin
Chip1Position := PlVars[1].CurrentPosition;
PlayingWindow[1].SelectPosition2(Chip1Position);
PlayingWindow[1].PageControl1.Repaint;
ExportModal.ExportProgress.Position := ExportModal.ExportProgress.Position + 1;
end;
if (NumberOfSoundChips = 2) and (Chip2Position <> PlVars[2].CurrentPosition) then
begin
Chip2Position := PlVars[2].CurrentPosition;
PlayingWindow[2].SelectPosition2(Chip2Position);
PlayingWindow[2].PageControl1.Repaint;
end;
until False;
ExportModal.Free;
// Save wav
CreateWaveHeader(TMPFileStream.Size, SampleRate, SampleBit, 2, WaveHeader);
FileStream := TFileStream.Create(FileName, fmCreate);
FileStream.Seek(0, soFromBeginning);
FileStream.Write(WaveHeader, SizeOf(WaveHeader));
TMPFileStream.Position := 0;
FileStream.CopyFrom(TMPFileStream, TMPFileStream.Size);
FileStream.Free;
TMPFileStream.Free;
DeleteFile(TMPFileName);
// Restore chip & audio params
MainForm.SetEmulatingChip(prevEmulatingChip);
//Set_Optimization(prevOptForQuality);
SetSampleRate(prevSampleRate);
SetBitRate(prevBitRate);
SetNChans(prevNumChans);
LoopAllowed := prevLoopAllowed;
MainForm.TrackBar1.Position := prevVolume;
// Restore controls
MainForm.EnableControlsForExport;
// Set childs positions
PlayingWindow[1].SelectPosition2(0);
if PlayingWindow[2] <> nil then PlayingWindow[2].SelectPosition2(0);
ExportStarted := False;
end;
}
procedure CreateWaveAyumi(FileName: string);
type
T24Bit = record
b1, b2, b3: Byte
end;
const
AudioBufferSize = 4096;
var
WaveHeader: TWaveHeader;
i, BitRate, NumChannels, PrevChanAlloc: Integer;
FileStream, TMPFileStream: TFileStream;
isrCounter, isrStep: Double;
ExportModal: TExport;
RealBufferSize: Integer;
FromPosition, ToPosition, CurPosition: Integer;
PrevLoopAllowed: Boolean;
PlayAll: Boolean;
LeadWindow: TMDIChild;
PrevPosNum1, PrevPosNum2, PrevPatNum1, PrevPatNum2: Integer;
TMPFileName: string;
ayumi1, ayumi2: TAyumi;
AudioBuff8Stereo: array of array[0..1] of Byte;
AudioBuff16Stereo: array of array[0..1] of Word;
AudioBuff24Stereo: array of array[0..1] of T24Bit;
AudioBuff32Stereo: array of array[0..1] of Integer;
AudioBuff8Mono: array of Byte;
AudioBuff16Mono: array of Word;
AudioBuff24Mono: array of T24Bit;
AudioBuff32Mono: array of Integer;
procedure SetAyumiParams(ayumi: TAyumi; Chip: Byte);
var
j: Byte;
r: array[0..13] of byte;
begin
if ayumi = nil then Exit;
for j := 0 to 13 do
r[j] := SoundChip[Chip].AYRegisters.Index[j];
ayumi.SetTone(0, (r[1] shl 8) or r[0]);
ayumi.SetTone(1, (r[3] shl 8) or r[2]);
ayumi.SetTone(2, (r[5] shl 8) or r[4]);
ayumi.SetNoise(r[6]);
ayumi.SetMixer(0, r[7] and 1, (r[7] shr 3) and 1, r[8] shr 4);
ayumi.SetMixer(1, (r[7] shr 1) and 1, (r[7] shr 4) and 1, (r[9] shr 4) and 1);
ayumi.SetMixer(2, (r[7] shr 2) and 1, (r[7] shr 5) and 1, (r[10] shr 4) and 1);
ayumi.SetVolume(0, r[8] and $0f);
ayumi.SetVolume(1, r[9] and $0f);
ayumi.SetVolume(2, r[10] and $0f);
ayumi.SetEnvelope((r[12] shl 8) or r[11]);
if (r[13] <> 255) then
ayumi.setEnvelopeShape(r[13]);
SoundChip[Chip].AYRegisters.Index[13] := 255;
end;
procedure ChangePositions(PlayWindow: TMDIChild);
begin
if PlayWindow <> LeadWindow then begin
if LeadWindow.PositionNumber > PlayWindow.VTMP.Positions.Length - 1 then
Module_SetCurrentPosition(PlayWindow.VTMP.Positions.Length - 1)
else
Module_SetCurrentPosition(LeadWindow.PositionNumber);
Exit;
end;
if PlVars[CurChip].CurrentPosition = ToPosition then begin
if PlayAll then
Module_SetCurrentPosition(PlayWindow.VTMP.Positions.Loop)
else
Module_SetCurrentPosition(FromPosition);
if ExportLoops > 0 then
Dec(ExportLoops)
else
ExportFinished := True;
end
else
Module_SetCurrentPosition(PlVars[CurChip].CurrentPosition+1);
LeadWindow.PositionNumber := PlVars[CurChip].CurrentPosition;
end;
procedure FillBuffer;
var
i, j: Integer;
Left, Right: Double;
const
MaxPeak = 1.6;
MinPeak = -1.6;
begin
RealBufferSize := 0;
for i := 0 to AudioBufferSize-1 do begin
isrCounter := isrCounter + isrStep;
if isrCounter >= 1 then begin
isrCounter := isrCounter - 1;
Module_SetPointer(PlayingWindow[1].VTMP, 1);
if Pattern_PlayCurrentLine = 2 then begin
ChangePositions(PlayingWindow[1]);
if not ExportFinished then
Pattern_PlayCurrentLine;
end;
SetAyumiParams(ayumi1, 1);
if ayumi2 <> nil then begin
Module_SetPointer(PlayingWindow[2].VTMP, 2);
if Pattern_PlayCurrentLine = 2 then begin
ChangePositions(PlayingWindow[2]);
if not ExportFinished then
Pattern_PlayCurrentLine;
end;
SetAyumiParams(ayumi2, 2);
end;
end;
ayumi1.Process;
ayumi1.RemoveDC;
if ayumi2 <> nil then begin
ayumi2.Process;
ayumi2.RemoveDC;
end;
Left := ayumi1.left;
Right := ayumi1.right;
if ayumi2 <> nil then begin
Left := Left + ayumi2.left;
Right := Right + ayumi2.right;
end;
if Left > MaxPeak then Left := MaxPeak;
if Left < MinPeak then Left := MinPeak;
if Right > MaxPeak then Right := MaxPeak;
if Right < MinPeak then Right := MinPeak;
case NumChannels of
// MONO
1: case BitRate of
16: begin
AudioBuff16Mono[i] := Round(((Left + Right) / 2) * $4FFF);
end;
24: begin
j := Round(((Left + Right) / 2) * $4FFFFF);
AudioBuff24Mono[i].b1 := j and $FF;
AudioBuff24Mono[i].b2 := j shr 8;
AudioBuff24Mono[i].b3 := j shr 16;
end;
32: begin
AudioBuff32Mono[i] := Round(((Left + Right) / 2) * $4FFFFFFF);
end;
end;
// STEREO
2: case BitRate of
16: begin
AudioBuff16Stereo[i][0] := Round(Left * $4FFF);
AudioBuff16Stereo[i][1] := Round(Right * $4FFF);
end;
24: begin
j := Round(Left * $4FFFFF);
AudioBuff24Stereo[i][0].b1 := j and $FF;
AudioBuff24Stereo[i][0].b2 := j shr 8;
AudioBuff24Stereo[i][0].b3 := j shr 16;
j := Round(Right * $4FFFFF);
AudioBuff24Stereo[i][1].b1 := j and $FF;
AudioBuff24Stereo[i][1].b2 := j shr 8;
AudioBuff24Stereo[i][1].b3 := j shr 16;
end;
32: begin
AudioBuff32Stereo[i][0] := Round(Left * $4FFFFFFF);
AudioBuff32Stereo[i][1] := Round(Right * $4FFFFFFF);
end;
end;
end;
RealBufferSize := i;
if ExportFinished then Break;
end;
end;
procedure RestorePositionAndPattern(Child: TMDIChild; PosNum, PatNum: Integer);
begin
Child.PositionNumber := PosNum;
Child.PatNum := PatNum;
Child.Tracks.HideMyCaret;
Child.Tracks.RedrawTracks(0);
Child.Tracks.ShowMyCaret;
end;
begin
MainForm.DisableControlsForExport;
PrevPatNum2 := 0;
PrevPosNum2 := 0;
isrCounter := 1;
isrStep := (PlayingWindow[1].VTMP.IntFreq / 1000) / ExportOptions.GetSampleRate;
CurPosition := 0;
BitRate := ExportOptions.GetBitRate;
NumChannels := ExportOptions.GetNumChannels;
PlayAll := not ExportOptions.ExportSelected.Checked;
PrevChanAlloc := ChanAllocIndex;
PrevLoopAllowed := LoopAllowed;
// If mono, then set ABC
if ChanAllocIndex = 0 then
MainForm.SetChannelsAllocation(1);
if IsPlaying then StopPlaying;
PlayMode := PMPlayModule;