audio: Avoid accumulation errors in resampler.

icculus · icculus · commit 78f97108f9da · 2022-11-05T10:39:35.000-04:00
Fixes #6391.
diff --git a/src/audio/SDL_audiocvt.c b/src/audio/SDL_audiocvt.c
@@ -247,7 +247,7 @@ SDL_ResampleAudio(const int chans, const int inrate, const int outrate,
             *(dst++) = outsample;
         }
 
-        outtime += outtimeincr;
+        outtime = outtimeincr * i;
     }
 
     return outframes * chans * sizeof (float);

Original file line number	Diff line number	Diff line change
`@@ -247,7 +247,7 @@ SDL_ResampleAudio(const int chans, const int inrate, const int outrate,`
`247`	`247`	`*(dst++) = outsample;`
`248`	`248`	`}`
`249`	`249`
`250`		`- outtime += outtimeincr;`
	`250`	`+ outtime = outtimeincr * i;`
`251`	`251`	`}`
`252`	`252`
`253`	`253`	`return outframes * chans * sizeof (float);`