merge glitch-free branch back into trunk

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2445 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/tests/rtstutter.c

@@ -0,0 +1,119 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2008 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2 of the
+  License, or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <sched.h>
+#include <inttypes.h>
+#include <string.h>
+#include <pthread.h>
+
+#include <pulse/timeval.h>
+#include <pulse/gccmacro.h>
+
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+
+static int msec_lower, msec_upper;
+
+static void* work(void *p) PA_GCC_NORETURN;
+
+static void* work(void *p) {
+    cpu_set_t mask;
+    struct sched_param param;
+
+    pa_log_notice("CPU%i: Created thread.", PA_PTR_TO_INT(p));
+
+    memset(&param, 0, sizeof(param));
+    param.sched_priority = 12;
+    pa_assert_se(pthread_setschedparam(pthread_self(), SCHED_FIFO, &param) == 0);
+
+    CPU_ZERO(&mask);
+    CPU_SET(PA_PTR_TO_INT(p), &mask);
+    pa_assert_se(pthread_setaffinity_np(pthread_self(), sizeof(mask), &mask) == 0);
+
+    for (;;) {
+        struct timespec now, end;
+        uint64_t nsec;
+
+        pa_log_notice("CPU%i: Sleeping for 1s", PA_PTR_TO_INT(p));
+        sleep(1);
+
+        pa_assert_se(clock_gettime(CLOCK_REALTIME, &end) == 0);
+
+        nsec =
+            (uint64_t) ((((double) rand())*(msec_upper-msec_lower)*PA_NSEC_PER_MSEC)/RAND_MAX) +
+            (uint64_t) (msec_lower*PA_NSEC_PER_MSEC);
+
+        pa_log_notice("CPU%i: Freezing for %ims", PA_PTR_TO_INT(p), (int) (nsec/PA_NSEC_PER_MSEC));
+
+        end.tv_sec += nsec / PA_NSEC_PER_SEC;
+        end.tv_nsec += nsec % PA_NSEC_PER_SEC;
+
+        while (end.tv_nsec > PA_NSEC_PER_SEC) {
+            end.tv_sec++;
+            end.tv_nsec -= PA_NSEC_PER_SEC;
+        }
+
+        do {
+            pa_assert_se(clock_gettime(CLOCK_REALTIME, &now) == 0);
+        } while (now.tv_sec < end.tv_sec ||
+                 (now.tv_sec == end.tv_sec && now.tv_nsec < end.tv_nsec));
+    }
+}
+
+int main(int argc, char*argv[]) {
+    int n;
+
+    srand(time(NULL));
+
+    if (argc >= 3) {
+        msec_lower = atoi(argv[1]);
+        msec_upper = atoi(argv[2]);
+    } else if (argc >= 2) {
+        msec_lower = 0;
+        msec_upper = atoi(argv[1]);
+    } else {
+        msec_lower = 0;
+        msec_upper = 1000;
+    }
+
+    pa_assert(msec_upper > 0);
+    pa_assert(msec_upper >= msec_lower);
+
+    pa_log_notice("Creating random latencies in the range of %ims to  %ims.", msec_lower, msec_upper);
+
+    for (n = 1; n < sysconf(_SC_NPROCESSORS_CONF); n++) {
+        pthread_t t;
+        pa_assert_se(pthread_create(&t, NULL, work, PA_INT_TO_PTR(n)) == 0);
+    }
+
+    work(PA_INT_TO_PTR(0));
+
+    return 0;
+}