code.delx.au - pulseaudio/blob - src/tests/interpol-test.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <signal.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <unistd.h>
  30 #include <assert.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <getopt.h>
  34 #include <math.h>
  35
  36 #ifdef HAVE_PTHREAD
  37 #include <pthread.h>
  38 #endif
  39
  40 #include <pulse/pulseaudio.h>
  41 #include <pulse/mainloop.h>
  42
  43 static pa_context *context = NULL;
  44 static pa_stream *stream = NULL;
  45 static pa_mainloop_api *mainloop_api = NULL;
  46
  47 static void stream_write_cb(pa_stream *p, size_t length, void *userdata) {
  48
  49     /* Just some silence */
  50     pa_stream_write(p, pa_xmalloc0(length), length, pa_xfree, 0, PA_SEEK_RELATIVE);
  51 }
  52
  53 /* This is called whenever the context status changes */
  54 static void context_state_callback(pa_context *c, void *userdata) {
  55     assert(c);
  56
  57     switch (pa_context_get_state(c)) {
  58         case PA_CONTEXT_CONNECTING:
  59         case PA_CONTEXT_AUTHORIZING:
  60         case PA_CONTEXT_SETTING_NAME:
  61             break;
  62
  63         case PA_CONTEXT_READY: {
  64
  65             static const pa_sample_spec ss = {
  66                 .format = PA_SAMPLE_S16LE,
  67                 .rate = 44100,
  68                 .channels = 1
  69             };
  70
  71             fprintf(stderr, "Connection established.\n");
  72
  73             stream = pa_stream_new(c, "interpol-test", &ss, NULL);
  74             assert(stream);
  75
  76             pa_stream_connect_playback(stream, NULL, NULL, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL);
  77             pa_stream_set_write_callback(stream, stream_write_cb, NULL);
  78
  79             break;
  80         }
  81
  82         case PA_CONTEXT_TERMINATED:
  83             break;
  84
  85         case PA_CONTEXT_FAILED:
  86         default:
  87             fprintf(stderr, "Context error: %s\n", pa_strerror(pa_context_errno(c)));
  88             abort();
  89     }
  90 }
  91
  92 int main(int argc, char *argv[]) {
  93     pa_threaded_mainloop* m = NULL;
  94     int k, r;
  95     struct timeval start, last_info = { 0, 0 };
  96     pa_usec_t old_t = 0, old_rtc = 0;
  97
  98     /* Set up a new main loop */
  99     m = pa_threaded_mainloop_new();
 100     assert(m);
 101
 102     mainloop_api = pa_threaded_mainloop_get_api(m);
 103
 104     context = pa_context_new(mainloop_api, argv[0]);
 105     assert(context);
 106
 107     pa_context_set_state_callback(context, context_state_callback, NULL);
 108
 109     r = pa_context_connect(context, NULL, 0, NULL);
 110     assert(r >= 0);
 111
 112     pa_gettimeofday(&start);
 113
 114     pa_threaded_mainloop_start(m);
 115
 116     for (k = 0; k < 5000; k++) {
 117         int success = 0, changed = 0;
 118         pa_usec_t t, rtc;
 119         struct timeval now, tv;
 120
 121         pa_threaded_mainloop_lock(m);
 122
 123         if (stream) {
 124             const pa_timing_info *info;
 125
 126             if (pa_stream_get_time(stream, &t) >= 0)
 127                 success = 1;
 128
 129             if ((info = pa_stream_get_timing_info(stream)))
 130                 if (last_info.tv_usec != info->timestamp.tv_usec || last_info.tv_sec != info->timestamp.tv_sec) {
 131                     changed = 1;
 132                     last_info = info->timestamp;
 133                 }
 134         }
 135
 136         pa_threaded_mainloop_unlock(m);
 137
 138         if (success) {
 139             pa_gettimeofday(&now);
 140
 141             rtc = pa_timeval_diff(&now, &start);
 142             printf("%i\t%llu\t%llu\t%llu\t%llu\t%u\n", k, rtc, t, rtc-old_rtc, t-old_t, changed);
 143             old_t = t;
 144             old_rtc = rtc;
 145         }
 146
 147         /* Spin loop, ugly but normal usleep() is just too badly grained */
 148
 149         tv = now;
 150         while (pa_timeval_diff(pa_gettimeofday(&now), &tv) < 1000)
 151 #ifdef HAVE_PTHREAD
 152             pthread_yield();
 153 #elif defined(OS_IS_WIN32)
 154             Sleep(0);
 155 #else
 156             ;
 157 #endif
 158     }
 159
 160     if (m)
 161         pa_threaded_mainloop_stop(m);
 162
 163     if (stream) {
 164         pa_stream_disconnect(stream);
 165         pa_stream_unref(stream);
 166     }
 167
 168     if (context) {
 169         pa_context_disconnect(context);
 170         pa_context_unref(context);
 171     }
 172
 173     if (m)
 174         pa_threaded_mainloop_free(m);
 175
 176     return 0;
 177 }