From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Fri, 19 Nov 2010 12:23:03 +0000 (+0000)
Subject: optimize prologic inversion, it was really showing up in profiles
X-Git-Tag: xonotic-v0.1.0preview~56^2~8
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=96c898c4a8f6d5033b1e2e9990817dcba4ee48f1;p=xonotic%2Fdarkplaces.git

optimize prologic inversion, it was really showing up in profiles


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10610 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/snd_mix.c b/snd_mix.c
index 74a13671..9094ce6c 100644
--- a/snd_mix.c
+++ b/snd_mix.c
@@ -257,12 +257,21 @@ static qboolean SND_PaintChannel (channel_t *ch, portable_sampleframe_t *paint,
 						samples += 2;
 					}
 				}
+				else if (vol[0] + vol[1] > 0 && ch->prologic_invert == -1)
+				{
+					for (i = 0;i < count;i++)
+					{
+						paint[i].sample[0] += (samples[0] * vol[0]) >> 8;
+						paint[i].sample[1] -= (samples[1] * vol[1]) >> 8;
+						samples += 2;
+					}
+				}
 				else if (vol[0] + vol[1] > 0)
 				{
 					for (i = 0;i < count;i++)
 					{
 						paint[i].sample[0] += (samples[0] * vol[0]) >> 8;
-						paint[i].sample[1] += (samples[1] * vol[1] * ch->prologic_invert) >> 8;
+						paint[i].sample[1] += (samples[1] * vol[1]) >> 8;
 						samples += 2;
 					}
 				}
@@ -308,12 +317,21 @@ static qboolean SND_PaintChannel (channel_t *ch, portable_sampleframe_t *paint,
 						samples += 1;
 					}
 				}
+				else if (vol[0] + vol[1] > 0 && ch->prologic_invert == -1)
+				{
+					for (i = 0;i < count;i++)
+					{
+						paint[i].sample[0] += (samples[0] * vol[0]) >> 8;
+						paint[i].sample[1] -= (samples[0] * vol[1]) >> 8;
+						samples += 1;
+					}
+				}
 				else if (vol[0] + vol[1] > 0)
 				{
 					for (i = 0;i < count;i++)
 					{
 						paint[i].sample[0] += (samples[0] * vol[0]) >> 8;
-						paint[i].sample[1] += (samples[0] * vol[1] * ch->prologic_invert) >> 8;
+						paint[i].sample[1] += (samples[0] * vol[1]) >> 8;
 						samples += 1;
 					}
 				}
@@ -367,12 +385,21 @@ static qboolean SND_PaintChannel (channel_t *ch, portable_sampleframe_t *paint,
 						samples += 2;
 					}
 				}
+				else if (vol[0] + vol[1] > 0 && ch->prologic_invert == -1)
+				{
+					for (i = 0;i < count;i++)
+					{
+						paint[i].sample[0] += (samples[0] * vol[0]) >> 16;
+						paint[i].sample[1] -= (samples[1] * vol[1]) >> 16;
+						samples += 2;
+					}
+				}
 				else if (vol[0] + vol[1] > 0)
 				{
 					for (i = 0;i < count;i++)
 					{
 						paint[i].sample[0] += (samples[0] * vol[0]) >> 16;
-						paint[i].sample[1] += (samples[1] * vol[1] * ch->prologic_invert) >> 16;
+						paint[i].sample[1] += (samples[1] * vol[1]) >> 16;
 						samples += 2;
 					}
 				}
@@ -418,12 +445,21 @@ static qboolean SND_PaintChannel (channel_t *ch, portable_sampleframe_t *paint,
 						samples += 1;
 					}
 				}
+				else if (vol[0] + vol[1] > 0 && ch->prologic_invert == -1)
+				{
+					for (i = 0;i < count;i++)
+					{
+						paint[i].sample[0] += (samples[0] * vol[0]) >> 16;
+						paint[i].sample[1] -= (samples[0] * vol[1]) >> 16;
+						samples += 1;
+					}
+				}
 				else if (vol[0] + vol[1] > 0)
 				{
 					for (i = 0;i < count;i++)
 					{
 						paint[i].sample[0] += (samples[0] * vol[0]) >> 16;
-						paint[i].sample[1] += (samples[0] * vol[1] * ch->prologic_invert) >> 16;
+						paint[i].sample[1] += (samples[0] * vol[1]) >> 16;
 						samples += 1;
 					}
 				}