From 3519df26d0efde3cc01855f19717ca3cd4b8061f Mon Sep 17 00:00:00 2001
From: ProjectRevoTPP <projectrevotpp@hotmail.com>
Date: Sat, 14 Sep 2024 20:26:45 -0400
Subject: [PATCH] n_synstartvoiceparam

---
 linker_scripts/us/symbol_addrs_code.txt |  2 +-
 src/50A00.c                             |  2 -
 src/libnaudio/n_synstartvoiceparam.c    | 66 +++++++++++++++++++++++++
 yamls/us/rom.yaml                       |  1 +
 4 files changed, 68 insertions(+), 3 deletions(-)
 create mode 100644 src/libnaudio/n_synstartvoiceparam.c

diff --git a/linker_scripts/us/symbol_addrs_code.txt b/linker_scripts/us/symbol_addrs_code.txt
index 97453ef..879801d 100644
--- a/linker_scripts/us/symbol_addrs_code.txt
+++ b/linker_scripts/us/symbol_addrs_code.txt
@@ -1467,7 +1467,7 @@ n_alSynDelete = 0x8004FD90; // type:func
 n_alSynAllocFX = 0x8004FDA0; // type:func
 func_8004FE00 = 0x8004FE00; // type:func
 func_8004FF20 = 0x8004FF20; // type:func
-func_8004FF40 = 0x8004FF40; // type:func
+n_alSynStartVoiceParams = 0x8004FF40; // type:func
 func_80050020 = 0x80050020; // type:func
 n_alFxPull = 0x800500C0; // type:func
 n_alFxParamHdl = 0x800503A0; // type:func
diff --git a/src/50A00.c b/src/50A00.c
index bd41793..b39d96a 100644
--- a/src/50A00.c
+++ b/src/50A00.c
@@ -3,5 +3,3 @@
 #pragma GLOBAL_ASM("asm/us/nonmatchings/50A00/func_8004FE00.s")
 
 #pragma GLOBAL_ASM("asm/us/nonmatchings/50A00/func_8004FF20.s")
-
-#pragma GLOBAL_ASM("asm/us/nonmatchings/50A00/func_8004FF40.s")
diff --git a/src/libnaudio/n_synstartvoiceparam.c b/src/libnaudio/n_synstartvoiceparam.c
new file mode 100644
index 0000000..679bea3
--- /dev/null
+++ b/src/libnaudio/n_synstartvoiceparam.c
@@ -0,0 +1,66 @@
+/*====================================================================
+ *
+ * Copyright 1993, Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
+ * Inc.; the contents of this file may not be disclosed to third
+ * parties, copied or duplicated in any form, in whole or in part,
+ * without the prior written permission of Silicon Graphics, Inc.
+ *
+ * RESTRICTED RIGHTS LEGEND:
+ * Use, duplication or disclosure by the Government is subject to
+ * restrictions as set forth in subdivision (c)(1)(ii) of the Rights
+ * in Technical Data and Computer Software clause at DFARS
+ * 252.227-7013, and/or in similar or successor clauses in the FAR,
+ * DOD or NASA FAR Supplement. Unpublished - rights reserved under the
+ * Copyright Laws of the United States.
+ *====================================================================*/
+#include "n_synthInternals.h"
+#include <ultraerror.h>
+#include <os_internal.h>
+
+void n_alSynStartVoiceParams(N_ALVoice *v, ALWaveTable *w, f32 pitch,
+			     s16 vol, ALPan pan, u8 fxmix, ALMicroTime t)
+{
+    ALStartParamAlt  *update;
+
+    if (v->pvoice) {
+        /*
+         * get new update struct from the free list
+         */
+        update = (ALStartParamAlt *)__n_allocParam();
+        ALFailIf(update == 0, ERR_ALSYN_NO_UPDATE);
+
+	if (fxmix > 127)
+            fxmix = 127;
+        
+        /*
+         * set offset and fxmix data
+         */
+#ifdef SAMPLE_ROUND
+	update->delta  = SAMPLE184( n_syn->paramSamples + v->pvoice->offset);
+#else
+        update->delta  = n_syn->paramSamples + v->pvoice->offset;
+#endif
+        update->next   = 0;
+        update->type   = AL_FILTER_START_VOICE_ALT;
+
+        update->unity  = v->unityPitch;
+        update->pan    = pan;
+        update->volume = vol;
+        update->fxMix  = fxmix;
+        update->pitch  = pitch;
+#ifdef SAMPLE_ROUND
+	update->samples = SAMPLE184( _n_timeToSamples(t) );
+#else
+        update->samples = _n_timeToSamples(t);
+#endif
+        update->wave    = w;
+        
+	n_alEnvmixerParam(v->pvoice, AL_FILTER_ADD_UPDATE, update);        
+    }
+    
+}
+
+
diff --git a/yamls/us/rom.yaml b/yamls/us/rom.yaml
index c9fde85..d8bda82 100644
--- a/yamls/us/rom.yaml
+++ b/yamls/us/rom.yaml
@@ -114,6 +114,7 @@
     - [0x50990, c, libnaudio/n_syndelete]
     - [0x509A0, c, libnaudio/n_synallocfx]
     - [0x50A00, c]
+    - [0x50B40, c, libnaudio/n_synstartvoiceparam]
     - [0x50C20, c]
     - [0x50CC0, c, libnaudio/n_reverb]
     - [0x51740, c]