From e60a68ede522e56b3a52ddad25ab1704b587e9c2 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Sat, 10 Oct 2015 06:20:46 +0200
Subject: midi is now using a thread as well

---
 apps/midi.c | 42 ++++++++++++++++++++++++++++++++++--------
 1 file changed, 34 insertions(+), 8 deletions(-)

(limited to 'apps/midi.c')

diff --git a/apps/midi.c b/apps/midi.c
index 8110475..b923316 100644
--- a/apps/midi.c
+++ b/apps/midi.c
@@ -25,15 +25,16 @@
 #include <stdio.h>
 #include <error.h>
 #include <poll.h>
+#include <assert.h>
 
 #include "midi.h"
 
 
 int midi_init(midi_t* m, const char* device)
 {
-  if(!m)
-    return -1;
+  assert(m != NULL);
 
+  m->stop_ = 0;
   int ret = snd_rawmidi_open(&(m->input_), NULL, device, SND_RAWMIDI_NONBLOCK);
   if(ret < 0) {
     error(0, 0, "MIDI: cannot open port '%s': %s", device, snd_strerror(ret));
@@ -43,10 +44,11 @@ int midi_init(midi_t* m, const char* device)
   return 0;
 }
 
-void midi_run(midi_t* m)
+static void* midi_run(void* p)
 {
-  if(!m)
-    return;
+  assert(p != NULL);
+
+  midi_t* m = (midi_t*)p;
 
   int npfds;
   struct pollfd *pfds;
@@ -62,9 +64,10 @@ void midi_run(midi_t* m)
       error(0, errno, "MIDI: poll failed");
       break;
     }
-    /* if(err == 0) { */
-    /*       // TIMEOUT */
-    /* } */
+    if(err == 0) {
+      if(m->stop_)
+        break;
+    }
 
     unsigned short revents;
     if((err = snd_rawmidi_poll_descriptors_revents(m->input_, pfds, npfds, &revents)) < 0) {
@@ -90,5 +93,28 @@ void midi_run(midi_t* m)
     for (i = 0; i < ret; ++i)
       printf("%02X%c", buf[i], (i >= (ret-1)) ? '\n' : ' ');
   }
+  return NULL;
+}
+
+int midi_start(midi_t* m)
+{
+  assert(m != NULL);
+
+  int ret = pthread_create(&(m->thread_), NULL, midi_run, (void*)m);
+  if(ret)
+    error(0, ret, "faild to create midi thread");
+
+  return ret;
+}
+
+int midi_stop(midi_t* m)
+{
+  assert(m != NULL);
+
+  m->stop_ = 1;
+  int ret = pthread_join(m->thread_, NULL);
+  if(ret)
+    error(0, ret, "faild to join midi thread");
 
+  return ret;
 }
-- 
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