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 #define INTERPOLATE
  40
  41 static pa_context *context = NULL;
  42 static pa_stream *stream = NULL;
  43 static pa_mainloop_api *mainloop_api = NULL;
  44 static pa_bool_t playback = TRUE;
  45
  46 static void stream_write_cb(pa_stream *p, size_t nbytes, void *userdata) {
  47     /* Just some silence */
  48     pa_assert_se(pa_stream_write(p, pa_xmalloc0(nbytes), nbytes, pa_xfree, 0, PA_SEEK_RELATIVE) == 0);
  49 }
  50
  51 static void stream_read_cb(pa_stream *p, size_t nbytes, void *userdata) {
  52     /* We don't care, just drop the data */
  53
  54     while (pa_stream_readable_size(p) > 0) {
  55         const void *d;
  56         size_t b;
  57
  58         pa_assert_se(pa_stream_peek(p, &d, &b) == 0);
  59         pa_assert_se(pa_stream_drop(p) == 0);
  60     }
  61 }
  62
  63 static void stream_latency_cb(pa_stream *p, void *userdata) {
  64 #ifndef INTERPOLATE
  65     pa_operation *o;
  66
  67     o = pa_stream_update_timing_info(p, NULL, NULL);
  68     pa_operation_unref(o);
  69 #endif
  70 }
  71
  72 /* This is called whenever the context status changes */
  73 static void context_state_callback(pa_context *c, void *userdata) {
  74     assert(c);
  75
  76     switch (pa_context_get_state(c)) {
  77         case PA_CONTEXT_CONNECTING:
  78         case PA_CONTEXT_AUTHORIZING:
  79         case PA_CONTEXT_SETTING_NAME:
  80             break;
  81
  82         case PA_CONTEXT_READY: {
  83             pa_stream_flags_t flags = PA_STREAM_AUTO_TIMING_UPDATE;
  84
  85             static const pa_sample_spec ss = {
  86                 .format = PA_SAMPLE_S16LE,
  87                 .rate = 44100,
  88                 .channels = 2
  89             };
  90
  91 #ifdef INTERPOLATE
  92             flags |= PA_STREAM_INTERPOLATE_TIMING;
  93 #endif
  94
  95             fprintf(stderr, "Connection established.\n");
  96
  97             stream = pa_stream_new(c, "interpol-test", &ss, NULL);
  98             assert(stream);
  99
 100             if (playback) {
 101                 pa_assert_se(pa_stream_connect_playback(stream, NULL, NULL, flags, NULL, NULL) == 0);
 102                 pa_stream_set_write_callback(stream, stream_write_cb, NULL);
 103             } else {
 104                 pa_assert_se(pa_stream_connect_record(stream, NULL, NULL, flags) == 0);
 105                 pa_stream_set_read_callback(stream, stream_read_cb, NULL);
 106             }
 107
 108             pa_stream_set_latency_update_callback(stream, stream_latency_cb, NULL);
 109
 110             break;
 111         }
 112
 113         case PA_CONTEXT_TERMINATED:
 114             break;
 115
 116         case PA_CONTEXT_FAILED:
 117         default:
 118             fprintf(stderr, "Context error: %s\n", pa_strerror(pa_context_errno(c)));
 119             abort();
 120     }
 121 }
 122
 123 int main(int argc, char *argv[]) {
 124     pa_threaded_mainloop* m = NULL;
 125     int k, r;
 126     struct timeval start, last_info = { 0, 0 };
 127     pa_usec_t old_t = 0, old_rtc = 0;
 128     pa_bool_t corked = FALSE;
 129
 130     pa_log_set_level(PA_LOG_DEBUG);
 131
 132     playback = argc <= 1 || !pa_streq(argv[1], "-r");
 133
 134     /* Set up a new main loop */
 135     m = pa_threaded_mainloop_new();
 136     assert(m);
 137
 138     mainloop_api = pa_threaded_mainloop_get_api(m);
 139
 140     context = pa_context_new(mainloop_api, argv[0]);
 141     assert(context);
 142
 143     pa_context_set_state_callback(context, context_state_callback, NULL);
 144
 145     r = pa_context_connect(context, NULL, 0, NULL);
 146     assert(r >= 0);
 147
 148     pa_gettimeofday(&start);
 149
 150     r = pa_threaded_mainloop_start(m);
 151     assert(r >= 0);
 152
 153     for (k = 0; k < 20000; k++) {
 154         pa_bool_t success = FALSE, changed = FALSE;
 155         pa_usec_t t, rtc;
 156         struct timeval now, tv;
 157         pa_bool_t playing = FALSE;
 158
 159         pa_threaded_mainloop_lock(m);
 160
 161         if (stream) {
 162             const pa_timing_info *info;
 163
 164             if (pa_stream_get_time(stream, &t) >= 0)
 165                 success = TRUE;
 166
 167             if ((info = pa_stream_get_timing_info(stream))) {
 168                 if (memcmp(&last_info, &info->timestamp, sizeof(struct timeval))) {
 169                     changed = TRUE;
 170                     last_info = info->timestamp;
 171                 }
 172                 if (info->playing)
 173                     playing = TRUE;
 174             }
 175         }
 176
 177         pa_threaded_mainloop_unlock(m);
 178
 179         pa_gettimeofday(&now);
 180
 181         if (success) {
 182             pa_bool_t cork_now;
 183
 184             rtc = pa_timeval_diff(&now, &start);
 185             printf("%i\t%llu\t%llu\t%llu\t%llu\t%lli\t%u\t%u\n", k,
 186                    (unsigned long long) rtc,
 187                    (unsigned long long) t,
 188                    (unsigned long long) (rtc-old_rtc),
 189                    (unsigned long long) (t-old_t),
 190                    (signed long long) rtc - (signed long long) t,
 191                    changed,
 192                    playing);
 193
 194             fflush(stdout);
 195             old_t = t;
 196             old_rtc = rtc;
 197
 198             cork_now = (rtc / (2*PA_USEC_PER_SEC)) % 2 == 1;
 199
 200             if (corked != cork_now) {
 201                 pa_threaded_mainloop_lock(m);
 202                 pa_operation_unref(pa_stream_cork(stream, cork_now, NULL, NULL));
 203                 pa_threaded_mainloop_unlock(m);
 204
 205                 pa_log(cork_now ? "Corking" : "Uncorking");
 206
 207                 corked = cork_now;
 208             }
 209         }
 210
 211         /* Spin loop, ugly but normal usleep() is just too badly grained */
 212
 213         tv = now;
 214         while (pa_timeval_diff(pa_gettimeofday(&now), &tv) < 1000)
 215             pa_thread_yield();
 216     }
 217
 218     if (m)
 219         pa_threaded_mainloop_stop(m);
 220
 221     if (stream) {
 222         pa_stream_disconnect(stream);
 223         pa_stream_unref(stream);
 224     }
 225
 226     if (context) {
 227         pa_context_disconnect(context);
 228         pa_context_unref(context);
 229     }
 230
 231     if (m)
 232         pa_threaded_mainloop_free(m);
 233
 234     return 0;
 235 }