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 #include <pulse/pulseaudio.h>
  37 #include <pulse/mainloop.h>
  38
  39 #include <pulsecore/thread.h>
  40
  41 static pa_context *context = NULL;
  42 static pa_stream *stream = NULL;
  43 static pa_mainloop_api *mainloop_api = NULL;
  44
  45 static void stream_write_cb(pa_stream *p, size_t length, void *userdata) {
  46
  47     /* Just some silence */
  48     pa_stream_write(p, pa_xmalloc0(length), length, pa_xfree, 0, PA_SEEK_RELATIVE);
  49 }
  50
  51 /* This is called whenever the context status changes */
  52 static void context_state_callback(pa_context *c, void *userdata) {
  53     assert(c);
  54
  55     switch (pa_context_get_state(c)) {
  56         case PA_CONTEXT_CONNECTING:
  57         case PA_CONTEXT_AUTHORIZING:
  58         case PA_CONTEXT_SETTING_NAME:
  59             break;
  60
  61         case PA_CONTEXT_READY: {
  62
  63             static const pa_sample_spec ss = {
  64                 .format = PA_SAMPLE_S16LE,
  65                 .rate = 44100,
  66                 .channels = 1
  67             };
  68
  69             fprintf(stderr, "Connection established.\n");
  70
  71             stream = pa_stream_new(c, "interpol-test", &ss, NULL);
  72             assert(stream);
  73
  74             pa_stream_connect_playback(stream, NULL, NULL, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL);
  75             pa_stream_set_write_callback(stream, stream_write_cb, NULL);
  76
  77             break;
  78         }
  79
  80         case PA_CONTEXT_TERMINATED:
  81             break;
  82
  83         case PA_CONTEXT_FAILED:
  84         default:
  85             fprintf(stderr, "Context error: %s\n", pa_strerror(pa_context_errno(c)));
  86             abort();
  87     }
  88 }
  89
  90 int main(int argc, char *argv[]) {
  91     pa_threaded_mainloop* m = NULL;
  92     int k, r;
  93     struct timeval start, last_info = { 0, 0 };
  94     pa_usec_t old_t = 0, old_rtc = 0;
  95
  96     /* Set up a new main loop */
  97     m = pa_threaded_mainloop_new();
  98     assert(m);
  99
 100     mainloop_api = pa_threaded_mainloop_get_api(m);
 101
 102     context = pa_context_new(mainloop_api, argv[0]);
 103     assert(context);
 104
 105     pa_context_set_state_callback(context, context_state_callback, NULL);
 106
 107     r = pa_context_connect(context, NULL, 0, NULL);
 108     assert(r >= 0);
 109
 110     pa_gettimeofday(&start);
 111
 112     pa_threaded_mainloop_start(m);
 113
 114     for (k = 0; k < 5000; k++) {
 115         int success = 0, changed = 0;
 116         pa_usec_t t, rtc;
 117         struct timeval now, tv;
 118
 119         pa_threaded_mainloop_lock(m);
 120
 121         if (stream) {
 122             const pa_timing_info *info;
 123
 124             if (pa_stream_get_time(stream, &t) >= 0)
 125                 success = 1;
 126
 127             if ((info = pa_stream_get_timing_info(stream)))
 128                 if (last_info.tv_usec != info->timestamp.tv_usec || last_info.tv_sec != info->timestamp.tv_sec) {
 129                     changed = 1;
 130                     last_info = info->timestamp;
 131                 }
 132         }
 133
 134         pa_threaded_mainloop_unlock(m);
 135
 136         if (success) {
 137             pa_gettimeofday(&now);
 138
 139             rtc = pa_timeval_diff(&now, &start);
 140             printf("%i\t%llu\t%llu\t%llu\t%llu\t%u\n", k, rtc, t, rtc-old_rtc, t-old_t, changed);
 141             old_t = t;
 142             old_rtc = rtc;
 143         }
 144
 145         /* Spin loop, ugly but normal usleep() is just too badly grained */
 146
 147         tv = now;
 148         while (pa_timeval_diff(pa_gettimeofday(&now), &tv) < 1000)
 149             pa_thread_yield();
 150     }
 151
 152     if (m)
 153         pa_threaded_mainloop_stop(m);
 154
 155     if (stream) {
 156         pa_stream_disconnect(stream);
 157         pa_stream_unref(stream);
 158     }
 159
 160     if (context) {
 161         pa_context_disconnect(context);
 162         pa_context_unref(context);
 163     }
 164
 165     if (m)
 166         pa_threaded_mainloop_free(m);
 167
 168     return 0;
 169 }