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 2.1 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 static pa_bool_t playback = TRUE;
  43
  44 static void stream_write_cb(pa_stream *p, size_t nbytes, void *userdata) {
  45     /* Just some silence */
  46     pa_assert_se(pa_stream_write(p, pa_xmalloc0(nbytes), nbytes, pa_xfree, 0, PA_SEEK_RELATIVE) == 0);
  47 }
  48
  49 static void stream_read_cb(pa_stream *p, size_t nbytes, void *userdata) {
  50     /* We don't care, just drop the data */
  51
  52     while (pa_stream_readable_size(p) > 0) {
  53         const void *d;
  54         size_t b;
  55
  56         pa_assert_se(pa_stream_peek(p, &d, &b) == 0);
  57         pa_assert_se(pa_stream_drop(p) == 0);
  58     }
  59 }
  60
  61 /* This is called whenever the context status changes */
  62 static void context_state_callback(pa_context *c, void *userdata) {
  63     assert(c);
  64
  65     switch (pa_context_get_state(c)) {
  66         case PA_CONTEXT_CONNECTING:
  67         case PA_CONTEXT_AUTHORIZING:
  68         case PA_CONTEXT_SETTING_NAME:
  69             break;
  70
  71         case PA_CONTEXT_READY: {
  72
  73             static const pa_sample_spec ss = {
  74                 .format = PA_SAMPLE_S16LE,
  75                 .rate = 44100,
  76                 .channels = 2
  77             };
  78
  79             fprintf(stderr, "Connection established.\n");
  80
  81             stream = pa_stream_new(c, "interpol-test", &ss, NULL);
  82             assert(stream);
  83
  84             if (playback) {
  85                 pa_assert_se(pa_stream_connect_playback(stream, NULL, NULL, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL) == 0);
  86                 pa_stream_set_write_callback(stream, stream_write_cb, NULL);
  87             } else {
  88                 pa_assert_se(pa_stream_connect_record(stream, NULL, NULL, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE) == 0);
  89                 pa_stream_set_read_callback(stream, stream_read_cb, NULL);
  90             }
  91
  92             break;
  93         }
  94
  95         case PA_CONTEXT_TERMINATED:
  96             break;
  97
  98         case PA_CONTEXT_FAILED:
  99         default:
 100             fprintf(stderr, "Context error: %s\n", pa_strerror(pa_context_errno(c)));
 101             abort();
 102     }
 103 }
 104
 105 int main(int argc, char *argv[]) {
 106     pa_threaded_mainloop* m = NULL;
 107     int k, r;
 108     struct timeval start, last_info = { 0, 0 };
 109     pa_usec_t old_t = 0, old_rtc = 0;
 110     pa_bool_t corked = FALSE;
 111
 112     playback = argc <= 1 || !pa_streq(argv[1], "-r");
 113
 114     /* Set up a new main loop */
 115     m = pa_threaded_mainloop_new();
 116     assert(m);
 117
 118     mainloop_api = pa_threaded_mainloop_get_api(m);
 119
 120     context = pa_context_new(mainloop_api, argv[0]);
 121     assert(context);
 122
 123     pa_context_set_state_callback(context, context_state_callback, NULL);
 124
 125     r = pa_context_connect(context, NULL, 0, NULL);
 126     assert(r >= 0);
 127
 128     pa_gettimeofday(&start);
 129
 130     r = pa_threaded_mainloop_start(m);
 131     assert(r >= 0);
 132
 133     for (k = 0; k < 20000; k++) {
 134         pa_bool_t success = FALSE, changed = FALSE;
 135         pa_usec_t t, rtc;
 136         struct timeval now, tv;
 137         pa_bool_t playing = FALSE;
 138
 139         pa_threaded_mainloop_lock(m);
 140
 141         if (stream) {
 142             const pa_timing_info *info;
 143
 144             if (pa_stream_get_time(stream, &t) >= 0)
 145                 success = TRUE;
 146
 147             if ((info = pa_stream_get_timing_info(stream))) {
 148                 if (memcmp(&last_info, &info->timestamp, sizeof(struct timeval))) {
 149                     changed = TRUE;
 150                     last_info = info->timestamp;
 151                 }
 152                 if (info->playing)
 153                     playing = TRUE;
 154             }
 155         }
 156
 157         pa_threaded_mainloop_unlock(m);
 158
 159         pa_gettimeofday(&now);
 160
 161         if (success) {
 162             pa_bool_t cork_now;
 163
 164             rtc = pa_timeval_diff(&now, &start);
 165             printf("%i\t%llu\t%llu\t%llu\t%llu\t%lli\t%u\t%u\n", k,
 166                    (unsigned long long) rtc,
 167                    (unsigned long long) t,
 168                    (unsigned long long) (rtc-old_rtc),
 169                    (unsigned long long) (t-old_t),
 170                    (signed long long) rtc - (signed long long) t,
 171                    changed,
 172                    playing);
 173
 174             fflush(stdout);
 175             old_t = t;
 176             old_rtc = rtc;
 177
 178             cork_now = (rtc / (2*PA_USEC_PER_SEC)) % 2 == 1;
 179
 180             if (corked != cork_now) {
 181                 pa_threaded_mainloop_lock(m);
 182                 pa_operation_unref(pa_stream_cork(stream, cork_now, NULL, NULL));
 183                 pa_threaded_mainloop_unlock(m);
 184
 185                 pa_log(cork_now ? "Corking" : "Uncorking");
 186
 187                 corked = cork_now;
 188             }
 189         }
 190
 191         /* Spin loop, ugly but normal usleep() is just too badly grained */
 192
 193         tv = now;
 194         while (pa_timeval_diff(pa_gettimeofday(&now), &tv) < 1000)
 195             pa_thread_yield();
 196     }
 197
 198     if (m)
 199         pa_threaded_mainloop_stop(m);
 200
 201     if (stream) {
 202         pa_stream_disconnect(stream);
 203         pa_stream_unref(stream);
 204     }
 205
 206     if (context) {
 207         pa_context_disconnect(context);
 208         pa_context_unref(context);
 209     }
 210
 211     if (m)
 212         pa_threaded_mainloop_free(m);
 213
 214     return 0;
 215 }