From 56d9418119045d536efa3f552af6e13d9353ada9 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Sun, 1 May 2011 13:59:44 -0700
Subject: Add an HRTF filter for mono sources The data is based on the KEMAR
 HRTF data provided by MIT, which can be found at
 <http://sound.media.mit.edu/resources/KEMAR.html>. The compact measurements
 were used. See hrtf_tables.inc for more information.

The filter is only available for stereo output, using a 44100hz playback rate.
Note also that it currently only applies to mono sounds, and the cf_level and
head_dampen config options are ignored while it is active.
---
 OpenAL32/Include/alMain.h | 1 +
 OpenAL32/alSource.c       | 4 ++++
 2 files changed, 5 insertions(+)

(limited to 'OpenAL32')

diff --git a/OpenAL32/Include/alMain.h b/OpenAL32/Include/alMain.h
index 6c18a387..9cf2b1a4 100644
--- a/OpenAL32/Include/alMain.h
+++ b/OpenAL32/Include/alMain.h
@@ -587,6 +587,7 @@ ALboolean IsValidChannels(ALenum type);
 #define HRTF_BITS        (7)
 #define HRTF_LENGTH      (1<<HRTF_BITS)
 #define HRTF_LENGTH_MASK (HRTF_LENGTH-1)
+void GetHrtfCoeffs(ALfloat azimuth, ALfloat angle, const ALshort **left, const ALshort **right);
 
 void al_print(const char *fname, unsigned int line, const char *fmt, ...)
              PRINTF_STYLE(3,4);
diff --git a/OpenAL32/alSource.c b/OpenAL32/alSource.c
index ed69af34..14beb85f 100644
--- a/OpenAL32/alSource.c
+++ b/OpenAL32/alSource.c
@@ -1348,6 +1348,10 @@ AL_API ALvoid AL_APIENTRY alSourcePlayv(ALsizei n, const ALuint *sources)
             Source->BuffersPlayed = 0;
 
             Source->Buffer = Source->queue->buffer;
+
+            for(j = 0;j < HRTF_LENGTH;j++)
+                Source->HrtfHistory[j] = 0.0f;
+            Source->HrtfOffset = 0;
         }
         else
             Source->state = AL_PLAYING;
-- 
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