From edefa0cdd8d0a83aeb6b545b1914a7a2a0bcbd30 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineering.com>
Date: Fri, 22 Nov 2019 10:08:11 -0600
Subject: Detect HR timestamp compatible version of ALSA before using HR
 timestamp functions

---
 configure | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'configure')

diff --git a/configure b/configure
index 1de90e9..9273076 100755
--- a/configure
+++ b/configure
@@ -2186,6 +2186,7 @@ SYSTEM_FEATURES="
 SYSTEM_FUNCS="
     access
     aligned_malloc
+    alsa_hr_ts
     arc4random
     clock_gettime
     closesocket
@@ -6515,8 +6516,15 @@ else
 EOF
 fi
 
-enabled alsa && { check_pkg_config alsa alsa "alsa/asoundlib.h" snd_pcm_htimestamp ||
-                  check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound; }
+if enabled alsa; then
+    check_pkg_config alsa alsa "alsa/asoundlib.h" snd_pcm_htimestamp ||
+    check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
+    if check_type "alsa/asoundlib.h alsa/pcm.h" snd_pcm_tstamp_type_t; then
+        enable alsa_hr_ts
+    else
+        warn "High resolution timestamps not supported by your ALSA version.  Streaming A/V sync may suffer!"
+    fi
+fi
 
 enabled libjack &&
     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
-- 
cgit v1.1