From 29d109f8efdff9c1a90ca8079f0eea5dc2c38c28 Mon Sep 17 00:00:00 2001
From: xorw <10dmar10@gmail.com>
Date: Wed, 10 May 2017 12:21:56 +0200
Subject: [PATCH] Finished doppler shift support (added listener's velocity
 update)

---
 src/client/cl_entities.c        | 10 ++++++++++
 src/client/sound/header/sound.h |  1 +
 src/client/sound/openal.c       |  7 +++++--
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/client/cl_entities.c b/src/client/cl_entities.c
index dc34e904..69da83e7 100644
--- a/src/client/cl_entities.c
+++ b/src/client/cl_entities.c
@@ -933,3 +933,13 @@ CL_GetEntitySoundVelocity(int ent, vec3_t vel)
 	VectorSubtract(old->current.origin, old->prev.origin, vel);
 }
 
+void
+CL_GetViewVelocity(vec3_t vel)
+{
+	// restore value from 12.3 fixed point
+	const float scale_factor = 1.0f / 8.0f;
+
+	vel[0] = (float)cl.frame.playerstate.pmove.velocity[0] * scale_factor;
+	vel[1] = (float)cl.frame.playerstate.pmove.velocity[1] * scale_factor;
+	vel[2] = (float)cl.frame.playerstate.pmove.velocity[2] * scale_factor;
+}
diff --git a/src/client/sound/header/sound.h b/src/client/sound/header/sound.h
index 9defde89..9ad79b38 100644
--- a/src/client/sound/header/sound.h
+++ b/src/client/sound/header/sound.h
@@ -55,5 +55,6 @@ struct sfx_s *S_FindName(char *name, qboolean create);
    dynamically re-spatialized */
 void CL_GetEntitySoundOrigin(int ent, vec3_t org);
 void CL_GetEntitySoundVelocity(int ent, vec3_t vel);
+void CL_GetViewVelocity(vec3_t vel);
 
 #endif
diff --git a/src/client/sound/openal.c b/src/client/sound/openal.c
index d172b937..93ebf1b4 100644
--- a/src/client/sound/openal.c
+++ b/src/client/sound/openal.c
@@ -607,6 +607,7 @@ AL_Update(void)
 	int i;
 	channel_t *ch;
 	vec_t orientation[6];
+	vec3_t listener_velocity;
 
 	paintedtime = cls.realtime;
 
@@ -617,8 +618,10 @@ AL_Update(void)
 	qalListener3f(AL_POSITION, AL_UnpackVector(listener_origin));
 	qalListenerfv(AL_ORIENTATION, orientation);
 
-	// TODO(xorw): add current listener's velocity update
-	// qalListener3f(AL_VELOCITY, AL_UnpackVector(listener_velocity));
+	CL_GetViewVelocity(listener_velocity);
+	// xorw: sounds funky if not scaled down a lot
+	VectorScale(listener_velocity, 0.05f, listener_velocity);
+	qalListener3f(AL_VELOCITY, AL_UnpackVector(listener_velocity));
 
 	/* update spatialization for dynamic sounds */
 	ch = channels;