gentoo-overlay/media-video/mpv/files/0.18.1/mpv-0.18.1-fix-stuck-volume-on-pulseaudio.patch

commit d191d76e52a992840ab614f760f1189391a5507d
Author: wm4 <wm4@nowhere>
Date:   Thu Jul 14 18:11:14 2016 +0200

ao_pulse: fix some volume control rounding issues

Volume could get easily "stuck" or making too huge steps when doing
things like "add ao-volume 1".

diff --git a/audio/out/ao_pulse.c b/audio/out/ao_pulse.c
index d553b67..fc0dd0d 100644
--- a/audio/out/ao_pulse.c
+++ b/audio/out/ao_pulse.c
@@ -23,6 +23,7 @@
 #include <stdbool.h>
 #include <string.h>
 #include <stdint.h>
+#include <math.h>
 #include <pthread.h>

 #include <pulse/pulseaudio.h>
@@ -34,8 +35,8 @@
 #include "ao.h"
 #include "internal.h"

-#define VOL_PA2MP(v) ((v) * 100 / PA_VOLUME_NORM)
-#define VOL_MP2PA(v) ((v) * PA_VOLUME_NORM / 100)
+#define VOL_PA2MP(v) ((v) * 100.0 / PA_VOLUME_NORM)
+#define VOL_MP2PA(v) lrint((v) * PA_VOLUME_NORM / 100)

 struct priv {
     // PulseAudio playback stream object