al: fix build with sdl 1.2

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

diff --git a/src/engine/e_soundfile_wav.pas b/src/engine/e_soundfile_wav.pas
index fe9a8a26f9c10ded420e82f183cee4c6167f3c77..153cad427f4f1b58c94f60977644c9dedeb882ec 100644 (file)
--- a/src/engine/e_soundfile_wav.pas
+++ b/src/engine/e_soundfile_wav.pas
@@ -24,15 +24,17 @@ type
 
   TWAVLoader = 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
     FData: Pointer;
     FDataLen: LongWord;
+    FDataPos: LongWord;
+    FLooping: Boolean;
   end;
 
   TWAVLoaderFactory = class (TSoundLoaderFactory)
@@ -46,7 +48,7 @@ implementation
 
 uses
   {$IFDEF USE_SDL}
-    SDL,
+    SDL, cmem,
   {$ELSE}
     SDL2,
   {$ENDIF}
@@ -87,8 +89,10 @@ begin
     AUDIO_U8,     AUDIO_S8    : tformat := AUDIO_U8; (* yes, unsigned *)
     AUDIO_U16LSB, AUDIO_U16MSB: tformat := AUDIO_S16SYS; (* and yes, signed *)
     AUDIO_S16LSB, AUDIO_S16MSB: tformat := AUDIO_S16SYS;
+    {$IFDEF USE_SDL2}
     AUDIO_S32LSB, AUDIO_S32MSB: tformat := AUDIO_S16SYS; (* 32bit not supported in al core *)
     AUDIO_F32LSB, AUDIO_F32MSB: tformat := AUDIO_S16SYS; (* float not supported in al core *)
+    {$ENDIF}
   else result := false (* unsupported format *)
   end;
   if (result = true) and (format <> tformat) then
@@ -96,7 +100,11 @@ begin
     Result := False;
     if SDL_BuildAudioCVT(@cvt, format, chan, rate, tformat, chan, rate) <> -1 then
     begin
-      buf := SDL_realloc(buf, len * cvt.len_mult);
+      {$IFDEF USE_SDL2}
+        buf := SDL_realloc(buf, len * cvt.len_mult);
+      {$ELSE}
+        buf := realloc(buf, len * cvt.len_mult);
+      {$ENDIF}
       cvt.len := len;
       cvt.buf := buf;
       result := SDL_ConvertAudio(@cvt) = 0;
@@ -131,7 +139,7 @@ begin
           FFormat.SampleBits := Spec.format and $FF;
         {$ENDIF}
         FFormat.Channels := Spec.channels;
-        FStreaming := False; // never stream wavs
+        FDataPos := 0;
         FDataLen := Len;
         FData := Buf;
       end
@@ -143,7 +151,7 @@ begin
   end
 end;
 
-function TWAVLoader.Load(Data: Pointer; Len: LongWord; SStreaming: Boolean): Boolean;
+function TWAVLoader.Load(Data: Pointer; Len: LongWord; Loop: Boolean): Boolean;
   var
     RW: PSDL_RWops;
 begin
@@ -152,9 +160,11 @@ begin
   if Result = False then
     e_LogWriteln('Could not load WAV: ' + SDL_GetError());
   SDL_RWclose(RW);
+  FStreaming := False;
+  FLooping := Loop;
 end;
 
-function TWAVLoader.Load(FName: string; SStreaming: Boolean): Boolean;
+function TWAVLoader.Load(FName: string; Loop: Boolean): Boolean;
   var
     RW: PSDL_RWops;
 begin
@@ -171,36 +181,50 @@ begin
     Result := False
   end;
   SDL_RWclose(RW);
+  FStreaming := False;
+  FLooping := Loop;
 end;
 
-function TWAVLoader.SetPosition(Pos: LongWord): Boolean;
+function TWAVLoader.Finished(): Boolean;
 begin
-  Result := False; // makes no sense when not streaming
+  Result := FDataPos >= FDataLen;
 end;
 
-function TWAVLoader.FillBuffer(Buf: Pointer; Len: LongWord): LongWord;
+function TWAVLoader.Restart(): Boolean;
 begin
-  if FDataLen < Len then
-    Len := FDataLen;
-  if FData <> nil then
-  begin
-    Move(FData^, Buf^, Len);
-    Result := Len;
-  end
-  else
-    Result := 0;
+  Result := True;
+  FDataPos := 0;
 end;
 
-function TWAVLoader.GetAll(var OutPtr: Pointer): LongWord;
+function TWAVLoader.FillBuffer(Buf: Pointer; Len: LongWord): LongWord;
+var
+  OutPos: LongWord;
+  Tx: LongWord;
 begin
-  OutPtr := FData;
-  Result := FDataLen;
+  OutPos := 0;
+  Result := 0;
+
+  while (FDataPos < FDataLen) and (OutPos < Len) do
+  begin
+    Tx := nmin(FDataLen - FDataPos, Len - OutPos);
+    Move((FData + FDataPos)^, (Buf + OutPos)^, Tx);
+
+    FDataPos := FDataPos + Tx;
+    OutPos := OutPos + Tx;
+    Result := Result + Tx;
+
+    if (FDataPos >= FDataLen) and FLooping then
+      FDataPos := 0;
+  end;
 end;
 
 procedure TWAVLoader.Free();
 begin
   if FData <> nil then
     SDL_FreeWAV(FData); // SDL allocates inside the DLL, so we need this
+  FDataPos := 0;
+  FData := nil;
+  FDataLen := 0;
 end;
 
 initialization