Better locking on jitter buffer stats printing

// FREEBIE

jni/redphone/CallAudioManager.h

@@ -15,7 +15,7 @@ class CallAudioManager {
 
 private:
   volatile int       running;
-  int                finished;
+  volatile int       finished;
   SLObjectItf        engineObject;
   SLEngineItf        engineEngine;
   AudioCodec         audioCodec;

jni/redphone/WebRtcJitterBuffer.cpp

@@ -1,4 +1,5 @@
 #include "WebRtcJitterBuffer.h"
+#include <time.h>
 
 #define TAG "WebRtcJitterBuffer"
 
@@ -14,7 +15,9 @@ int WebRtcJitterBuffer::init() {
   webrtc::NetEq::Config config;
   config.sample_rate_hz = 8000;
 
+  pthread_mutex_lock(&lock);
   neteq = webrtc::NetEq::Create(config);
+  pthread_mutex_unlock(&lock);
 
   if (neteq == NULL) {
     __android_log_print(ANDROID_LOG_WARN, TAG, "Failed to construct NetEq!");
@@ -26,8 +29,7 @@ int WebRtcJitterBuffer::init() {
     return -1;
   }
 
-  pthread_t thread;
-  pthread_create(&thread, NULL, &WebRtcJitterBuffer::collectStats, this);
+  pthread_create(&stats, NULL, &WebRtcJitterBuffer::collectStats, this);
 
   return 0;
 }
@@ -65,13 +67,21 @@ int WebRtcJitterBuffer::getAudio(short *rawData, int maxRawData) {
 }
 
 void WebRtcJitterBuffer::stop() {
+  pthread_mutex_lock(&lock);
   running = 0;
+  pthread_cond_signal(&condition);
+  pthread_mutex_unlock(&lock);
+
+  pthread_join(stats, NULL);
 }
 
 void WebRtcJitterBuffer::collectStats() {
   while (running) {
     webrtc::NetEqNetworkStatistics stats;
+
+    pthread_mutex_lock(&lock);
     neteq->NetworkStatistics(&stats);
+    pthread_mutex_unlock(&lock);
 
     __android_log_print(ANDROID_LOG_WARN, "WebRtcJitterBuffer",
                         "Jitter Stats:\n{\n" \
@@ -96,7 +106,22 @@ void WebRtcJitterBuffer::collectStats() {
                         stats.accelerate_rate,
                         stats.clockdrift_ppm,
                         stats.added_zero_samples);
-    sleep(30);
+
+    struct timespec timeToWait;
+    struct timeval  now;
+    gettimeofday(&now, NULL);
+
+    timeToWait.tv_sec  = now.tv_sec;
+    timeToWait.tv_nsec = now.tv_usec * 1000;
+    timeToWait.tv_sec += 30;
+
+    pthread_mutex_lock(&lock);
+
+    if (running) {
+      pthread_cond_timedwait(&condition, &lock, &timeToWait);
+    }
+
+    pthread_mutex_unlock(&lock);
   }
 }
 

jni/redphone/WebRtcJitterBuffer.h

@@ -18,6 +18,10 @@ private:
   webrtc::NetEq *neteq;
   WebRtcCodec webRtcCodec;
 
+  pthread_t stats;
+  pthread_mutex_t lock;
+  pthread_cond_t condition;
+
 public:
   WebRtcJitterBuffer(AudioCodec &codec);
   ~WebRtcJitterBuffer();