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

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