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unit RenderToWave;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls, EditBtn,
ExtCtrls, Spin, ComCtrls, Arrow, constants, process;
type
{ EInvalidOrder }
EInvalidOrder = class(Exception);
{ TfrmRenderToWave }
TfrmRenderToWave = class(TForm)
ComboBox1: TComboBox;
ExportChannelsCheckBox: TCheckBox;
Label2: TLabel;
Label3: TLabel;
Panel1: TPanel;
PlayEntireSongRadioButton: TRadioButton;
FromPositionRadioButton: TRadioButton;
RenderButton: TButton;
CancelButton: TButton;
FileNameEdit1: TFileNameEdit;
Label1: TLabel;
PlayEntireSongSpinEdit: TSpinEdit;
FromPositionLowerSpinEdit: TSpinEdit;
FromPositionUpperSpinEdit: TSpinEdit;
procedure CancelButtonClick(Sender: TObject);
procedure RenderButtonClick(Sender: TObject);
procedure FileNameEdit1Change(Sender: TObject);
procedure FormShow(Sender: TObject);
private
SeenPatterns: array of Integer;
StartOfSong, CurrentPattern: Integer;
Rendering: Boolean;
CancelRequested: Boolean;
function FilenameToFormatIndex: Integer;
function GetFFMPEGFormat: String;
function CreateFFMPEGProcess(const DestFilename: String): TProcess;
procedure UpdateUI;
procedure ExportWaveToFile(Filename: String);
procedure RenderEntireSong(Times: Integer);
procedure RenderFromPosition(FromPos, ToPos: Integer);
procedure OrderCheckCallback;
public
end;
var
frmRenderToWave: TfrmRenderToWave;
implementation
uses sound, machine, mainloop, vars, symparser;
{$R *.lfm}
procedure TfrmRenderToWave.RenderButtonClick(Sender: TObject);
begin
Rendering := True;
CancelRequested := False;
UpdateUI;
try
ExportWaveToFile(FileNameEdit1.FileName);
except
on E: Exception do begin
MessageDlg('Error!', 'Couldn''t write ' + FileNameEdit1.FileName + '!' + LineEnding +
LineEnding + E.Message, mtError, [mbOk], '');
end;
end;
Rendering := False;
CancelRequested := False;
UpdateUI;
end;
procedure TfrmRenderToWave.CancelButtonClick(Sender: TObject);
begin
CancelRequested := True;
UpdateUI;
end;
procedure TfrmRenderToWave.FileNameEdit1Change(Sender: TObject);
begin
ComboBox1.ItemIndex := FilenameToFormatIndex;
UpdateUI;
end;
procedure TfrmRenderToWave.FormShow(Sender: TObject);
begin
FileNameEdit1.FileName:='';
PlayEntireSongRadioButton.Checked:=True;
PlayEntireSongSpinEdit.Value:=1;
FromPositionLowerSpinEdit.Value:=0;
FromPositionUpperSpinEdit.Value:=0;
end;
function TfrmRenderToWave.FilenameToFormatIndex: Integer;
begin
case LowerCase(ExtractFileExt(FileNameEdit1.FileName)) of
'.wav': Result := 0;
'.mp3': Result := 1;
'.flac': Result := 2;
else Result := 0;
end;
end;
function TfrmRenderToWave.GetFFMPEGFormat: String;
begin
case ComboBox1.ItemIndex of
0: Result := 'wav';
1: Result := 'mp3';
2: Result := 'flac';
else Result := 'wav';
end;
end;
procedure TfrmRenderToWave.UpdateUI;
begin
RenderButton.Enabled := (FileNameEdit1.FileName <> '') and not Rendering;
CancelButton.Enabled := Rendering and not CancelRequested;
end;
procedure DrainAndWaitForProcesses(const Procs: array of TProcess);
var
AllDone: Boolean;
I, Avail: Integer;
Discard: array[0..4095] of Byte;
begin
repeat
AllDone := True;
for I := Low(Procs) to High(Procs) do begin
if Procs[I] = nil then Continue;
if Procs[I].Output <> nil then begin
Avail := Procs[I].Output.NumBytesAvailable;
while Avail > 0 do begin
if Avail > SizeOf(Discard) then Avail := SizeOf(Discard);
Procs[I].Output.Read(Discard, Avail);
Avail := Procs[I].Output.NumBytesAvailable;
end;
end;
if Procs[I].Stderr <> nil then begin
Avail := Procs[I].Stderr.NumBytesAvailable;
while Avail > 0 do begin
if Avail > SizeOf(Discard) then Avail := SizeOf(Discard);
Procs[I].Stderr.Read(Discard, Avail);
Avail := Procs[I].Stderr.NumBytesAvailable;
end;
end;
if Procs[I].Running then AllDone := False;
end;
if not AllDone then begin
Application.ProcessMessages;
Sleep(100);
end;
until AllDone;
end;
function TfrmRenderToWave.CreateFFMPEGProcess(const DestFilename: String): TProcess;
begin
Result := TProcess.Create(nil);
Result.Executable := 'ffmpeg';
with Result.Parameters do begin
// HACK: to prevent ffmpeg from writing to stderr, we disable all output
// This is needed because ffmpeg blocks unless you read what it writes
Add('-nostats');
Add('-loglevel');
Add('0');
Add('-sample_rate');
Add(IntToStr(PlaybackFrequency));
Add('-y');
Add('-f');
Add('f32le');
Add('-channels');
Add('2');
Add('-i');
Add('-');
Add('-f');
Add(GetFFMPEGFormat);
Add(DestFilename);
end;
Result.Options := [poUsePipes, poNoConsole];
end;
procedure TfrmRenderToWave.ExportWaveToFile(Filename: String);
const
ChannelSuffixes: array[1..4] of String = ('_pulse1', '_pulse2', '_wave', '_noise');
var
MixProc: TProcess;
ChanProcs: array[1..4] of TProcess;
ChanStreams: array[1..4] of TStream;
ExportChannels: Boolean;
Dir, Base, Ext: String;
I: Integer;
begin
z80_reset;
ResetSound;
enablesound;
FCCallback := nil;
load(ConcatPaths([CacheDir, 'render', 'preview.gb']));
ExportChannels := ExportChannelsCheckBox.Checked;
for I := 1 to 4 do begin
ChanProcs[I] := nil;
ChanStreams[I] := nil;
end;
MixProc := CreateFFMPEGProcess(Filename);
MixProc.Execute;
if ExportChannels then begin
Dir := ExtractFilePath(Filename);
Ext := ExtractFileExt(Filename);
Base := ChangeFileExt(ExtractFileName(Filename), '');
for I := 1 to 4 do begin
ChanProcs[I] := CreateFFMPEGProcess(Dir + Base + ChannelSuffixes[I] + Ext);
ChanProcs[I].Execute;
ChanStreams[I] := ChanProcs[I].Input;
end;
end;
try
if ExportChannels then
BeginWritingChannelsToStreams(MixProc.Input, ChanStreams[1], ChanStreams[2], ChanStreams[3], ChanStreams[4])
else
BeginWritingSoundToStream(MixProc.Input);
if PlayEntireSongRadioButton.Checked then
RenderEntireSong(PlayEntireSongSpinEdit.Value)
else if FromPositionRadioButton.Checked then
RenderFromPosition(FromPositionLowerSpinEdit.Value, FromPositionUpperSpinEdit.Value);
if CancelRequested then Exit;
finally
EndWritingSoundToStream;
MixProc.CloseInput;
for I := 1 to 4 do
if ChanProcs[I] <> nil then ChanProcs[I].CloseInput;
DrainAndWaitForProcesses([MixProc, ChanProcs[1], ChanProcs[2], ChanProcs[3], ChanProcs[4]]);
MixProc.Free;
for I := 1 to 4 do
if ChanProcs[I] <> nil then ChanProcs[I].Free;
Panel1.Caption := 'Ready';
end;
end;
procedure TfrmRenderToWave.RenderEntireSong(Times: Integer);
var
OldFC, OldFD: TCPUCallback;
begin
OldFC := FCCallback;
OldFD := FDCallback;
FCCallback := @OrderCheckCallback;
FDCallback := nil;
SetLength(SeenPatterns, PeekSymbol(SYM_SONG_DESCRIPTOR, 4) div 2);
StartOfSong := -1;
CurrentPattern := -1;
repeat
z80_decode;
if Random(500) = 1 then Application.ProcessMessages;
until ((StartOfSong <> -1) and (SeenPatterns[StartOfSong]-1 = PlayEntireSongSpinEdit.Value)) or CancelRequested;
SetLength(SeenPatterns, 0);
FCCallback := OldFC;
FDCallback := OldFD;
end;
procedure TfrmRenderToWave.RenderFromPosition(FromPos, ToPos: Integer);
var
OldFC, OldFD: TCPUCallback;
StartPattern, TargetPattern: Integer;
SawTargetPattern: Boolean;
begin
OldFC := FCCallback;
OldFD := FDCallback;
FCCallback := @OrderCheckCallback;
FDCallback := nil;
SetLength(SeenPatterns, PeekSymbol(SYM_SONG_DESCRIPTOR, 4) div 2);
StartOfSong := -1;
CurrentPattern := -1;
StartPattern := FromPositionLowerSpinEdit.Value;
TargetPattern := FromPositionUpperSpinEdit.Value;
SawTargetPattern := False;
if StartPattern > High(SeenPatterns) then
raise EInvalidOrder.Create('The specified order doesn''t exist!');
PokeSymbol(SYM_CURRENT_ORDER, 2*StartPattern);
PokeSymbol(SYM_ROW, 0);
repeat
z80_decode;
if CurrentPattern = TargetPattern then
SawTargetPattern := True;
if Random(500) = 1 then Application.ProcessMessages;
until (StartOfSong <> -1) or
(SawTargetPattern and (CurrentPattern <> TargetPattern)) or
CancelRequested;
SetLength(SeenPatterns, 0);
FCCallback := OldFC;
FDCallback := OldFD;
end;
procedure TfrmRenderToWave.OrderCheckCallback;
var
Pat: Integer;
begin
Pat := (PeekSymbol(SYM_CURRENT_ORDER) div 2);
if (SeenPatterns[Pat] <> 0) and (StartOfSong = -1) then
StartOfSong := Pat;
Inc(SeenPatterns[Pat]);
CurrentPattern := Pat;
Panel1.Caption := 'Rendering order '+IntToStr(CurrentPattern+1);
end;
end.
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