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utimeslice.pas
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utimeslice.pas
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unit uTimeSlice;
{ A TimeSlice and TimeSlice List parser based on uTimeCode unit.
Copyright (C) 2018 Mohammadreza Bahrami [email protected]
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version with the following modification:
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent modules,and
to copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the terms
and conditions of the license of that module. An independent module is a
module which is not derived from or based on this library. If you modify
this library, you may extend this exception to your version of the library,
but you are not obligated to do so. If you do not wish to do so, delete this
exception statement from your version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
for more details.
You should have received a copy of the GNU Library General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1335, USA.
}
{$mode objfpc}{$H+}{$modeswitch advancedrecords}
interface
uses
Classes, SysUtils, uTimeCode;
const
DefaultTimeSliceSep = '-';
type
{ TBasicTimeSlice }
TBasicTimeSlice = record
StartPos: TTimeCode;
EndPos: TTimeCode;
end;
{ TTimeSliceFormatSettings }
TTimeSliceFormatSettings = record
TimeCodes: TTimeCodeFormatSettings;
SliceSep: String;
end;
{ TTimeSlice }
TTimeSlice = record
private
FInitialized: String;
FValue: TBasicTimeSlice;
FFormatSettings: TTimeSliceFormatSettings;
procedure InitCheck;
function CheckValidity: Boolean;
function GetDuration: TTimeCode;
function GetDelayedTimeSlice: TBasicTimeSlice;
procedure SetDelay(AValue: Double);
function GetValueString: String;
procedure SetValueString(const AValue: String);
function GetDelay: Double;
function GetValueStringEx: String;
procedure SetValueStringEx(AValue: String);
public
procedure Initialize(MillisecondPrecision: Word = DefaultMillisecondPrecision;
MajorSep: Char = DefaultTimeSep;
MinorSep: Char = DefaultMillisecSep;
const SliceSep: String = DefaultTimeSliceSep;
SourceFPS: Double = 25;
HasFrame: Boolean = False;
IsFrame: Boolean = False); overload;
procedure Initialize(const AFormatSettings: TTimeSliceFormatSettings); overload;
procedure Initialize(const TimeCodesFormat: TTimeCodeFormatSettings;
const SliceSep: String); overload;
procedure Reset;
property Valid: Boolean read CheckValidity;
property Delay: Double read GetDelay write SetDelay;
property Value: TBasicTimeSlice read FValue write FValue;
property ValueAsString: String read GetValueString write SetValueString;
property ValueAsStringEx: String read GetValueStringEx write SetValueStringEx;
property ValueWithDelay: TBasicTimeSlice read GetDelayedTimeSlice;
property Duration: TTimeCode read GetDuration;
property TimeSliceFormat: TTimeSliceFormatSettings read FFormatSettings write Initialize;
end;
{ TTimeSliceList }
TTimeSliceList = record
private
FList: array of TTimeSlice;
FSlice: TTimeSlice;
Procedure CheckIndex(AIndex: Integer); inline;
function CheckValidity: Boolean;
function CheckIncremental: Boolean;
procedure SetValueString(AValue: String);
function GetInvertedValue: String;
function GetValueString: String;
function Get(Index: Integer): TTimeSlice;
procedure Put(Index: Integer; AValue: TTimeSlice);
function GetCount: Integer;
procedure SetCount(AValue: Integer);
function GetExtendedValueString: String;
procedure SetExtendedValueString(AValue: String);
public
procedure Initialize(MillisecondPrecision: Word = DefaultMillisecondPrecision;
MajorSep: Char = DefaultTimeSep;
MinorSep: Char = DefaultMillisecSep;
const SliceSep: String = DefaultTimeSliceSep;
SourceFPS: Double = 25;
HasFrame: Boolean = False;
IsFrame: Boolean = False); overload;
procedure Initialize(const AFormatSettings: TTimeSliceFormatSettings); overload;
procedure LoadFromFile(AFile: String);
procedure LoadFromFileEx(AFile: String);
property Valid: Boolean read CheckValidity;
property Incremental: Boolean read CheckIncremental;
property Values[Index: Integer]: TTimeSlice read Get write Put;
property Value: String read GetValueString write SetValueString;
property InvertedValue: String read GetInvertedValue;
property ExtendedValue: String read GetExtendedValueString write SetExtendedValueString;
property Count: Integer read GetCount write SetCount;
end;
function DefaultTimeSliceFormatSettings: TTimeSliceFormatSettings;
implementation
const
SliceStartMarker = 'Start=';
SliceEndMarker = 'End=';
SliceDelayMarker = 'Delay=';
function DefaultTimeSliceFormatSettings: TTimeSliceFormatSettings;
begin
Result.TimeCodes := DefaultTimeCodeFormatSettings;
Result.SliceSep := DefaultTimeSliceSep;
end;
{ TTimeSlice }
procedure TTimeSlice.InitCheck;
begin
if FInitialized <> 'Yes!' then
begin
Initialize(DefaultTimeSliceFormatSettings);
FInitialized := 'Yes!';
end;
end;
procedure TTimeSlice.Initialize(MillisecondPrecision: Word; MajorSep: Char;
MinorSep: Char; const SliceSep: String; SourceFPS: Double; HasFrame: Boolean;
IsFrame: Boolean);
begin
FFormatSettings.TimeCodes.MillisecondPrecision := MillisecondPrecision;
FFormatSettings.TimeCodes.MajorSep := MajorSep;
FFormatSettings.TimeCodes.MinorSep := MinorSep;
FFormatSettings.TimeCodes.SourceFPS := SourceFPS;
FFormatSettings.TimeCodes.HasFrame := HasFrame;
FFormatSettings.TimeCodes.IsFrame := IsFrame;
FValue.StartPos.Initialize(FFormatSettings.TimeCodes);
FValue.EndPos.Initialize(FFormatSettings.TimeCodes);
FFormatSettings.SliceSep := SliceSep;
FInitialized := 'Yes!';
end;
procedure TTimeSlice.Initialize(const AFormatSettings: TTimeSliceFormatSettings
);
begin
FValue.StartPos.Initialize(AFormatSettings.TimeCodes);
FValue.EndPos.Initialize(AFormatSettings.TimeCodes);
FFormatSettings := AFormatSettings;
FInitialized := 'Yes!';
end;
procedure TTimeSlice.Initialize(const TimeCodesFormat: TTimeCodeFormatSettings;
const SliceSep: String); overload;
var
tsf: TTimeSliceFormatSettings;
begin
tsf.TimeCodes := TimeCodesFormat;
tsf.SliceSep := SliceSep;
Initialize(tsf);
end;
procedure TTimeSlice.Reset;
begin
FValue.StartPos.Value.Reset;
FValue.EndPos.Value.Reset;
SetDelay(0);
end;
function TTimeSlice.CheckValidity: Boolean;
begin
Result := FValue.StartPos.ValueAsDouble < FValue.EndPos.ValueAsDouble;
end;
procedure TTimeSlice.SetDelay(AValue: Double);
begin
FValue.StartPos.Delay := AValue;
FValue.EndPos.Delay := AValue;
end;
function TTimeSlice.GetValueString: String;
begin
InitCheck;
Result := FValue.StartPos.ValueAsString + FFormatSettings.SliceSep
+FValue.EndPos.ValueAsString;
end;
procedure TTimeSlice.SetValueString(const AValue: String);
var
i: Integer;
begin
InitCheck;
Reset;
i := AValue.IndexOf(FFormatSettings.SliceSep);
if (i < 1) or (i+FFormatSettings.SliceSep.Length > AValue.Length-2) then Exit;
FValue.StartPos.ValueAsString := AValue.Substring(0, i);
FValue.EndPos.ValueAsString := AValue.Substring(i+FFormatSettings.SliceSep.Length);
end;
function TTimeSlice.GetDelay: Double;
begin
Result := FValue.StartPos.Delay;
end;
function TTimeSlice.GetValueStringEx: String;
begin
InitCheck;
Result := SliceStartMarker + FValue.StartPos.ValueAsString +' '+
SliceEndMarker + FValue.EndPos.ValueAsString +' '+
SliceDelayMarker + GetDelay.ToString;
end;
procedure TTimeSlice.SetValueStringEx(AValue: String);
var
sa: TStringArray;
begin
InitCheck;
Reset;
if (AValue.IndexOf(SliceStartMarker) < 0)
or (AValue.IndexOf(SliceEndMarker) < 0)
or (AValue.IndexOf(SliceDelayMarker) < 0) then
Exit;
sa := AValue.Trim.Split(' ');
if Length(sa) <> 3 then Exit;
FValue.StartPos.ValueAsString := sa[0].Substring(SliceStartMarker.Length);
FValue.EndPos.ValueAsString := sa[1].Substring(SliceEndMarker.Length);
SetDelay(sa[2].Substring(SliceDelayMarker.Length).ToDouble);
end;
function TTimeSlice.GetDuration: TTimeCode;
begin
Result := Default(TTimeCode);
Result.ValueAsDouble := FValue.EndPos.ValueAsDouble - FValue.StartPos.ValueAsDouble;
end;
function TTimeSlice.GetDelayedTimeSlice: TBasicTimeSlice;
begin
Result := Default(TBasicTimeSlice);
with Result do
begin
StartPos.Initialize(FFormatSettings.TimeCodes);
StartPos.Value := FValue.StartPos.ValueWithDelay;
EndPos.Initialize(FFormatSettings.TimeCodes);
EndPos.Value := FValue.EndPos.ValueWithDelay;
end;
end;
{ TTimeSliceList }
procedure TTimeSliceList.Initialize(MillisecondPrecision: Word; MajorSep, MinorSep
: Char; const SliceSep: String; SourceFPS: Double; HasFrame, IsFrame: Boolean);
begin
FSlice.Initialize(MillisecondPrecision, MajorSep, MinorSep, SliceSep,
SourceFPS, HasFrame, IsFrame);
end;
procedure TTimeSliceList.Initialize(
const AFormatSettings: TTimeSliceFormatSettings);
begin
FSlice.Initialize(AFormatSettings);
end;
procedure TTimeSliceList.CheckIndex(AIndex: Integer);
begin
if (AIndex < Low(FList)) or (AIndex > High(FList)) then
raise EListError.Create('Out of bounds index');
end;
function TTimeSliceList.CheckValidity: Boolean;
var
i: Integer;
begin
Result := False;
if Length(FList) = 0 then Exit;
for i := 0 to High(FList) do
if not FList[i].Valid then Exit;
Result := True;
end;
function TTimeSliceList.CheckIncremental: Boolean;
var
i: Integer;
begin
Result := False;
if not CheckValidity then Exit;
for i := 0 to High(FList)-1 do
if FList[i].Value.EndPos.ValueAsDouble
> FList[i+1].Value.StartPos.ValueAsDouble then Exit;
Result := True;
end;
function TTimeSliceList.Get(Index: Integer): TTimeSlice;
begin
CheckIndex(Index);
Result := FList[Index];
end;
procedure TTimeSliceList.Put(Index: Integer; AValue: TTimeSlice);
begin
CheckIndex(Index);
FSlice.Value.StartPos.Value := AValue.Value.StartPos.Value;
FSlice.Value.EndPos.Value := AValue.Value.EndPos.Value;
FList[Index] := FSlice;
end;
function TTimeSliceList.GetCount: Integer;
begin
if not CheckIncremental then Exit(0);
Result := Length(FList);
end;
procedure TTimeSliceList.SetCount(AValue: Integer);
begin
if AValue < 0 then
AValue := 0;
SetLength(FList, AValue);
end;
procedure TTimeSliceList.LoadFromFile(AFile: String);
var
sl: TStringList;
begin
sl := TStringList.Create;
try
sl.LoadFromFile(AFile);
SetValueString(sl.Text.Trim);
finally
sl.Free;
end;
end;
procedure TTimeSliceList.LoadFromFileEx(AFile: String);
var
sl: TStringList;
begin
sl := TStringList.Create;
try
sl.LoadFromFile(AFile);
SetExtendedValueString(sl.Text.Trim);
finally
sl.Free;
end;
end;
function TTimeSliceList.GetValueString: String;
var
sl: TStringList;
i: Integer;
begin
Result := EmptyStr;
if not CheckValidity then Exit;
sl := TStringList.Create;
sl.Capacity := Length(FList);
try
for i := 0 to High(FList) do
sl.Add(FList[i].ValueAsString);
Result := sl.Text;
finally
sl.Free;
end;
end;
procedure TTimeSliceList.SetValueString(AValue: String);
var
sl: TStringList;
i: Integer;
begin
FList := nil;
if AValue = EmptyStr then Exit;
sl := TStringList.Create;
try
sl.Text := AValue;
if sl.Count = 0 then Exit;
SetLength(FList, sl.Count);
for i := 0 to sl.Count-1 do
begin
FSLice.ValueAsString := sl[i];
FList[i] := FSLice;
end;
finally
sl.Free;
end;
end;
function TTimeSliceList.GetInvertedValue: String;
//input: 00:00:01:00-00:00:02:00
//output: 00:00:00:00-00:00:01:00, 00:00:02:00-59:59:59:999
var
sl: TStringList;
i: Integer;
begin
Result := EmptyStr;
if not CheckIncremental then Exit;
sl := TStringList.Create;
sl.Capacity := Length(FList)*2;
try
if FList[0].Value.StartPos.ValueAsDouble > 0 then
begin
FSlice.Value.StartPos.ValueAsDouble := 0;
FSlice.Value.EndPos.Value := FList[0].Value.StartPos.Value;
sl.Add(FSlice.ValueAsString);
end;
for i := 0 to High(FList) do
begin
FSlice.Value.StartPos.Value := FList[i].Value.EndPos.Value;
if i = High(FList) then
FSlice.Value.EndPos.Value := TConstantTimeCodes.Max.Value
else
FSlice.Value.EndPos.Value := FList[i+1].Value.StartPos.Value;
sl.Add(FSlice.ValueAsString);
end;
Result := sl.Text;
finally
sl.Free;
end;
end;
function TTimeSliceList.GetExtendedValueString: String;
var
sl: TStringList;
i: Integer;
begin
Result := EmptyStr;
if not CheckValidity then Exit;
sl := TStringList.Create;
sl.Capacity := Length(FList);
try
for i := 0 to High(FList) do
sl.Add(FList[i].ValueAsStringEx);
Result := sl.Text;
finally
sl.Free;
end;
end;
procedure TTimeSliceList.SetExtendedValueString(AValue: String);
var
sl: TStringList;
i: Integer;
begin
FList := nil;
if AValue = EmptyStr then Exit;
sl := TStringList.Create;
try
sl.Text := AValue;
if sl.Count = 0 then Exit;
SetLength(FList, sl.Count);
for i := 0 to sl.Count-1 do
begin
FSLice.ValueAsStringEx := sl[i];
FList[i] := FSLice;
end;
finally
sl.Free;
end;
end;
end.