From 8e877c1f9ff8d20037299a93dbf8489d2bc9eb98 Mon Sep 17 00:00:00 2001
From: Joerg Mueller <nexyon@gmail.com>
Date: Sun, 22 Nov 2009 12:10:45 +0000
Subject: Added a first version of the Sound F-Curve Modifier, not really
 usable yet, but you can play around with it.

---
 source/blender/blenkernel/intern/fmodifier.c | 88 ++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)

(limited to 'source/blender/blenkernel/intern/fmodifier.c')

diff --git a/source/blender/blenkernel/intern/fmodifier.c b/source/blender/blenkernel/intern/fmodifier.c
index 5daa2ed1924..fba15075bdb 100644
--- a/source/blender/blenkernel/intern/fmodifier.c
+++ b/source/blender/blenkernel/intern/fmodifier.c
@@ -53,6 +53,8 @@
 #include "RNA_access.h"
 #include "RNA_types.h"
 
+#include "AUD_C-API.h"
+
 #ifndef DISABLE_PYTHON
 #include "BPY_extern.h" /* for BPY_pydriver_eval() */
 #endif
@@ -871,6 +873,91 @@ static FModifierTypeInfo FMI_LIMITS = {
 	fcm_limits_evaluate /* evaluate */
 };
 
+/* Sound F-Curve Modifier  --------------------------- */
+
+static void fcm_sound_new_data (void *mdata)
+{
+	FMod_Sound *data= (FMod_Sound *)mdata;
+
+	/* defaults */
+	data->strength= 1.0f;
+	data->delay = 0.0f;
+	data->modification = FCM_SOUND_MODIF_REPLACE;
+	data->sound = NULL;
+}
+
+static void fcm_sound_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime)
+{
+	FMod_Sound *data= (FMod_Sound *)fcm->data;
+	float amplitude;
+
+	AUD_Device* device;
+	SoundHandle* handle;
+	AUD_Sound* limiter;
+	AUD_SoundInfo info;
+
+//	evaltime = FRA2TIME(evaltime);
+	evaltime -= data->delay;
+
+	if(evaltime < 0.0f || data->sound == NULL || data->sound->cache == NULL)
+		return;
+
+	info = AUD_getInfo(data->sound->cache);
+	info.specs.channels = 1;
+	info.specs.format = AUD_FORMAT_FLOAT32;
+	device = AUD_openReadDevice(info.specs);
+	limiter = AUD_limitSound(data->sound->cache, evaltime, evaltime + 1);
+	AUD_playDevice(device, limiter);
+	AUD_unload(limiter);
+	AUD_readDevice(device, &amplitude, 1);
+	AUD_closeReadDevice(device);
+
+	/* combine the amplitude with existing motion data */
+	switch (data->modification) {
+		case FCM_SOUND_MODIF_ADD:
+			*cvalue= *cvalue + amplitude * data->strength;
+			break;
+		case FCM_SOUND_MODIF_SUBTRACT:
+			*cvalue= *cvalue - amplitude * data->strength;
+			break;
+		case FCM_SOUND_MODIF_MULTIPLY:
+			*cvalue= *cvalue * amplitude * data->strength;
+			break;
+		case FCM_SOUND_MODIF_REPLACE:
+		default:
+			*cvalue= *cvalue + amplitude * data->strength;
+			break;
+	}
+}
+
+static float fcm_sound_time (FCurve *fcu, FModifier *fcm, float cvalue, float evaltime)
+{
+	FMod_Sound *data= (FMod_Sound *)fcm->data;
+
+	/* check for the time delay */
+//	evaltime = FRA2TIME(evaltime);
+	if(evaltime < data->delay)
+		return data->delay;
+
+	/* modifier doesn't change time */
+	return evaltime;
+}
+
+static FModifierTypeInfo FMI_SOUND = {
+	FMODIFIER_TYPE_SOUND, /* type */
+	sizeof(FMod_Sound), /* size */
+	FMI_TYPE_REPLACE_VALUES, /* action type */
+	0, /* requirements */
+	"Sound", /* name */
+	"FMod_Sound", /* struct name */
+	NULL, /* free data */
+	NULL, /* copy data */
+	fcm_sound_new_data, /* new data */
+	NULL, /* verify */
+	fcm_sound_time, /* evaluate time */
+	fcm_sound_evaluate /* evaluate */
+};
+
 /* F-Curve Modifier API --------------------------- */
 /* All of the F-Curve Modifier api functions use FModifierTypeInfo structs to carry out
  * and operations that involve F-Curve modifier specific code.
@@ -892,6 +979,7 @@ static void fmods_init_typeinfo ()
 	fmodifiersTypeInfo[6]=  NULL/*&FMI_FILTER*/;			/* Filter F-Curve Modifier */  // XXX unimplemented
 	fmodifiersTypeInfo[7]=  &FMI_PYTHON;			/* Custom Python F-Curve Modifier */
 	fmodifiersTypeInfo[8]= 	&FMI_LIMITS;			/* Limits F-Curve Modifier */
+	fmodifiersTypeInfo[9]= 	&FMI_SOUND;				/* Sound F-Curve Modifier */
 }
 
 /* This function should be used for getting the appropriate type-info when only
-- 
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