simplify TSoundLoader interface

[d2df-sdl.git] / src / engine / e_soundfile_xmp.pas

diff --git a/src/engine/e_soundfile_xmp.pas b/src/engine/e_soundfile_xmp.pas
index afbadf3ad8d73dc63b0ba3b018acedca6bfce3cf..3d2ef087b957a08a1fcd69e22c17ef48b5569ea3 100644 (file)
--- a/src/engine/e_soundfile_xmp.pas
+++ b/src/engine/e_soundfile_xmp.pas
@@ -2,8 +2,7 @@
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
+ * the Free Software Foundation, version 3 of the License ONLY.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -25,15 +24,17 @@ type
 
   TXMPLoader = class (TSoundLoader)
   public
-    function Load(Data: Pointer; Len: LongWord; SStreaming: Boolean): Boolean; override; overload;
-    function Load(FName: string; SStreaming: Boolean): Boolean; override; overload;
-    function SetPosition(Pos: LongWord): Boolean; override;
+    function Load(Data: Pointer; Len: LongWord; Loop: Boolean): Boolean; override; overload;
+    function Load(FName: string; Loop: Boolean): Boolean; override; overload;
+    function Finished(): Boolean; override;
+    function Restart(): Boolean; override;
     function FillBuffer(Buf: Pointer; Len: LongWord): LongWord; override;
-    function GetAll(var OutPtr: Pointer): LongWord; override;
     procedure Free(); override;
   private
     FXMP: xmp_context;
     FLoaded: Boolean;
+    FLooping: Boolean;
+    FFinished: Boolean;
   end;
 
   TXMPLoaderFactory = class (TSoundLoaderFactory)
@@ -45,7 +46,7 @@ type
 
 implementation
 
-uses sysutils, utils, e_sound, e_log;
+uses sysutils, utils, math, e_sound, e_log;
 
 (* TXMPLoaderFactory *)
 
@@ -86,9 +87,10 @@ end;
 
 (* TXMPLoader *)
 
-function TXMPLoader.Load(Data: Pointer; Len: LongWord; SStreaming: Boolean): Boolean;
+function TXMPLoader.Load(Data: Pointer; Len: LongWord; Loop: Boolean): Boolean;
 var
   Err: LongInt;
+  Interp: LongInt;
 begin
   Result := False;
 
@@ -104,12 +106,18 @@ begin
     if xmp_start_player(FXMP, 48000, 0) <> 0 then
       raise Exception.Create('xmp_start_player failed');
 
+    if e_MusicLerp then Interp := XMP_INTERP_LINEAR
+    else Interp := XMP_INTERP_NEAREST;
+    xmp_set_player(FXMP, XMP_PLAYER_INTERP, Interp);
+
     FFormat.SampleRate := 48000;
     FFormat.SampleBits := 16;
     FFormat.Channels := 2;
 
     FStreaming := True; // modules are always streaming
     FLoaded := True;
+    FLooping := Loop;
+    FFinished := False;
     Result := True;
   except
     on E: Exception do
@@ -122,9 +130,10 @@ begin
   end;
 end;
 
-function TXMPLoader.Load(FName: string; SStreaming: Boolean): Boolean;
+function TXMPLoader.Load(FName: string; Loop: Boolean): Boolean;
 var
   Err: LongInt;
+  Interp: LongInt;
 begin
   Result := False;
 
@@ -140,12 +149,18 @@ begin
     if xmp_start_player(FXMP, 48000, 0) <> 0 then
       raise Exception.Create('xmp_start_player failed');
 
+    if e_MusicLerp then Interp := XMP_INTERP_LINEAR
+    else Interp := XMP_INTERP_NEAREST;
+    xmp_set_player(FXMP, XMP_PLAYER_INTERP, Interp);
+
     FFormat.SampleRate := 48000;
     FFormat.SampleBits := 16;
     FFormat.Channels := 2;
 
     FStreaming := True; // modules are always streaming
+    FLooping := Loop;
     FLoaded := True;
+    FFinished := False;
     Result := True;
   except
     on E: Exception do
@@ -158,30 +173,33 @@ begin
   end;
 end;
 
-function TXMPLoader.SetPosition(Pos: LongWord): Boolean;
+function TXMPLoader.Finished(): Boolean;
+begin
+  Result := FFinished;
+end;
+
+function TXMPLoader.Restart(): Boolean;
 begin
   Result := False;
   if FXMP = nil then Exit;
-  Result := xmp_set_position(FXMP, Pos) = 0;
+  Result := True;
+  FFinished := False;
+  xmp_restart_module(FXMP);
 end;
 
 function TXMPLoader.FillBuffer(Buf: Pointer; Len: LongWord): LongWord;
 var
-  LoopN: LongInt;
+  Ret: LongInt;
 begin
   Result := 0;
   if FXMP = nil then Exit;
-  if FLooping then
-    LoopN := 0
-  else
-    LoopN := 1;
-  if xmp_play_buffer(FXMP, Buf, Len, LoopN) = 0 then
-    Result := Len;
-end;
 
-function TXMPLoader.GetAll(var OutPtr: Pointer): LongWord;
-begin
-  Result := 0; // modules are always streaming, so this don't make sense
+  Ret := xmp_play_buffer(FXMP, Buf, Len, IfThen(FLooping, 0, 1));
+
+  if Ret = 0 then
+    Result := Len
+  else if (Ret = -XMP_END) and not FLooping then
+    FFinished := True;
 end;
 
 procedure TXMPLoader.Free();
@@ -197,6 +215,8 @@ begin
     FXMP := nil;
   end;
   FLoaded := False;
+  FLooping := False;
+  FFinished := False;
 end;
 
 initialization