From f619f8167646632d6eab10f529638eebbdda6af6 Mon Sep 17 00:00:00 2001
From: Nils Wallménius <nils@rockbox.org>
Date: Mon, 8 Oct 2007 19:28:41 +0000
Subject: Change loop structure for sample synthesizing. Gives a nice speedup
 on both coldfire and arm targets.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15036 a1c6a512-1295-4272-9138-f99709370657
---
 apps/plugins/midi/synth.h | 55 +----------------------------------------------
 1 file changed, 1 insertion(+), 54 deletions(-)

(limited to 'apps/plugins/midi/synth.h')

diff --git a/apps/plugins/midi/synth.h b/apps/plugins/midi/synth.h
index e04f9f4bd5..5f9edf89e5 100644
--- a/apps/plugins/midi/synth.h
+++ b/apps/plugins/midi/synth.h
@@ -17,61 +17,8 @@
  *
  ****************************************************************************/
 int initSynth(struct MIDIfile * mf, char * filename, char * drumConfig);
-int synthVoice(struct SynthObject * so);
 void setPoint(struct SynthObject * so, int pt);
-
-static inline void synthSample(int * mixL, int * mixR)
-{
-    int i;
-    register int dL=0;
-    register int dR=0;
-    register int sample = 0;
-    register struct SynthObject *voicept=voices;
-
-    for(i=MAX_VOICES/2; i > 0; i--)
-    {
-        if(voicept->isUsed==1)
-        {
-            sample = synthVoice(voicept);
-            dL += sample;
-            sample *= chPan[voicept->ch];
-            dR += sample;
-        }
-        voicept++;
-        if(voicept->isUsed==1)
-        {
-            sample = synthVoice(voicept);
-            dL += sample;
-            sample *= chPan[voicept->ch];
-            dR += sample;
-        }
-        voicept++;
-    }
-
-/* if MAX_VOICES is not even we do this to get the last voice */
-#if MAX_VOICES%2
-    if (MAX_VOICES%2)
-    {
-        if(voicept->isUsed==1)
-        {
-            sample = synthVoice(voicept);
-            dL += sample;
-            sample *= chPan[voicept->ch];
-            dR += sample;
-        }
-    }
-#endif
-
-    dL = (dL << 7) - dR;
-
-    *mixL=dL >> 7;
-    *mixR=dR >> 7;
-
-    /* TODO: Automatic Gain Control, anyone? */
-    /* Or, should this be implemented on the DSP's output volume instead? */
-
-    return;  /* No more ghetto lowpass filter. Linear interpolation works well. */
-}
+void synthSamples(int32_t *buf_ptr, unsigned int num_samples);
 
 static inline struct Event * getEvent(struct Track * tr, int evNum)
 {
-- 
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