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
  32 #include <pulse/pulseaudio.h>
  33 #include <pulse/mainloop.h>
  34
  35 #include <pulsecore/thread.h>
  36
  37 #define INTERPOLATE
  38 //#define CORK
  39
  40 static pa_context *context = NULL;
  41 static pa_stream *stream = NULL;
  42 static pa_mainloop_api *mainloop_api = NULL;
  43 static pa_bool_t playback = TRUE;
  44 static pa_usec_t latency = 0;
  45
  46 static void stream_write_cb(pa_stream *p, size_t nbytes, void *userdata) {
  47     /* Just some silence */
  48
  49     for (;;) {
  50         void *data;
  51
  52         pa_assert_se((nbytes = pa_stream_writable_size(p)) != (size_t) -1);
  53
  54         if (nbytes <= 0)
  55             break;
  56
  57         pa_assert_se(pa_stream_begin_write(p, &data, &nbytes) == 0);
  58         pa_memzero(data, nbytes);
  59         pa_assert_se(pa_stream_write(p, data, nbytes, NULL, 0, PA_SEEK_RELATIVE) == 0);
  60     }
  61 }
  62
  63 static void stream_read_cb(pa_stream *p, size_t nbytes, void *userdata) {
  64     /* We don't care about the data, just drop it */
  65
  66     for (;;) {
  67         const void *data;
  68
  69         pa_assert_se((nbytes = pa_stream_readable_size(p)) != (size_t) -1);
  70
  71         if (nbytes <= 0)
  72             break;
  73
  74         pa_assert_se(pa_stream_peek(p, &data, &nbytes) == 0);
  75         pa_assert_se(pa_stream_drop(p) == 0);
  76     }
  77 }
  78
  79 static void stream_latency_cb(pa_stream *p, void *userdata) {
  80 #ifndef INTERPOLATE
  81     pa_operation *o;
  82
  83     o = pa_stream_update_timing_info(p, NULL, NULL);
  84     pa_operation_unref(o);
  85 #endif
  86 }
  87
  88 /* This is called whenever the context status changes */
  89 static void context_state_callback(pa_context *c, void *userdata) {
  90     assert(c);
  91
  92     switch (pa_context_get_state(c)) {
  93         case PA_CONTEXT_CONNECTING:
  94         case PA_CONTEXT_AUTHORIZING:
  95         case PA_CONTEXT_SETTING_NAME:
  96             break;
  97
  98         case PA_CONTEXT_READY: {
  99             pa_stream_flags_t flags = PA_STREAM_AUTO_TIMING_UPDATE;
 100             pa_buffer_attr attr;
 101             static const pa_sample_spec ss = {
 102                 .format = PA_SAMPLE_S16LE,
 103                 .rate = 44100,
 104                 .channels = 2
 105             };
 106
 107             pa_zero(attr);
 108             attr.maxlength = (uint32_t) -1;
 109             attr.tlength = latency > 0 ? (uint32_t) pa_usec_to_bytes(latency, &ss) : (uint32_t) -1;
 110             attr.prebuf = (uint32_t) -1;
 111             attr.minreq = (uint32_t) -1;
 112             attr.fragsize = (uint32_t) -1;
 113
 114 #ifdef INTERPOLATE
 115             flags |= PA_STREAM_INTERPOLATE_TIMING;
 116 #endif
 117
 118             if (latency > 0)
 119                 flags |= PA_STREAM_ADJUST_LATENCY;
 120
 121             fprintf(stderr, "Connection established.\n");
 122
 123             pa_assert_se(stream = pa_stream_new(c, "interpol-test", &ss, NULL));
 124
 125             if (playback) {
 126                 pa_assert_se(pa_stream_connect_playback(stream, NULL, &attr, flags, NULL, NULL) == 0);
 127                 pa_stream_set_write_callback(stream, stream_write_cb, NULL);
 128             } else {
 129                 pa_assert_se(pa_stream_connect_record(stream, NULL, &attr, flags) == 0);
 130                 pa_stream_set_read_callback(stream, stream_read_cb, NULL);
 131             }
 132
 133             pa_stream_set_latency_update_callback(stream, stream_latency_cb, NULL);
 134
 135             break;
 136         }
 137
 138         case PA_CONTEXT_TERMINATED:
 139             break;
 140
 141         case PA_CONTEXT_FAILED:
 142         default:
 143             fprintf(stderr, "Context error: %s\n", pa_strerror(pa_context_errno(c)));
 144             abort();
 145     }
 146 }
 147
 148 int main(int argc, char *argv[]) {
 149     pa_threaded_mainloop* m = NULL;
 150     int k;
 151     struct timeval start, last_info = { 0, 0 };
 152     pa_usec_t old_t = 0, old_rtc = 0;
 153 #ifdef CORK
 154     pa_bool_t corked = FALSE;
 155 #endif
 156
 157     pa_log_set_level(PA_LOG_DEBUG);
 158
 159     playback = argc <= 1 || !pa_streq(argv[1], "-r");
 160
 161     latency =
 162         (argc >= 2 && !pa_streq(argv[1], "-r")) ? atoi(argv[1]) :
 163         (argc >= 3 ? atoi(argv[2]) : 0);
 164
 165     /* Set up a new main loop */
 166     pa_assert_se(m = pa_threaded_mainloop_new());
 167     pa_assert_se(mainloop_api = pa_threaded_mainloop_get_api(m));
 168     pa_assert_se(context = pa_context_new(mainloop_api, argv[0]));
 169
 170     pa_context_set_state_callback(context, context_state_callback, NULL);
 171
 172     pa_assert_se(pa_context_connect(context, NULL, 0, NULL) >= 0);
 173
 174     pa_gettimeofday(&start);
 175
 176     pa_assert_se(pa_threaded_mainloop_start(m) >= 0);
 177
 178 /* #ifdef CORK */
 179     for (k = 0; k < 20000; k++)
 180 /* #else */
 181 /*     for (k = 0; k < 2000; k++) */
 182 /* #endif */
 183     {
 184         pa_bool_t success = FALSE, changed = FALSE;
 185         pa_usec_t t, rtc, d;
 186         struct timeval now, tv;
 187         pa_bool_t playing = FALSE;
 188
 189         pa_threaded_mainloop_lock(m);
 190
 191         if (stream) {
 192             const pa_timing_info *info;
 193
 194             if (pa_stream_get_time(stream, &t) >= 0 &&
 195                 pa_stream_get_latency(stream, &d, NULL) >= 0)
 196                 success = TRUE;
 197
 198             if ((info = pa_stream_get_timing_info(stream))) {
 199                 if (memcmp(&last_info, &info->timestamp, sizeof(struct timeval))) {
 200                     changed = TRUE;
 201                     last_info = info->timestamp;
 202                 }
 203                 if (info->playing)
 204                     playing = TRUE;
 205             }
 206         }
 207
 208         pa_threaded_mainloop_unlock(m);
 209
 210         pa_gettimeofday(&now);
 211
 212         if (success) {
 213 #ifdef CORK
 214             pa_bool_t cork_now;
 215 #endif
 216             rtc = pa_timeval_diff(&now, &start);
 217             printf("%i\t%llu\t%llu\t%llu\t%llu\t%lli\t%u\t%u\t%llu\t%llu\n", k,
 218                    (unsigned long long) rtc,
 219                    (unsigned long long) t,
 220                    (unsigned long long) (rtc-old_rtc),
 221                    (unsigned long long) (t-old_t),
 222                    (signed long long) rtc - (signed long long) t,
 223                    changed,
 224                    playing,
 225                    (unsigned long long) latency,
 226                    (unsigned long long) d);
 227
 228             fflush(stdout);
 229             old_t = t;
 230             old_rtc = rtc;
 231
 232 #ifdef CORK
 233             cork_now = (rtc / (2*PA_USEC_PER_SEC)) % 2 == 1;
 234
 235             if (corked != cork_now) {
 236                 pa_threaded_mainloop_lock(m);
 237                 pa_operation_unref(pa_stream_cork(stream, cork_now, NULL, NULL));
 238                 pa_threaded_mainloop_unlock(m);
 239
 240                 pa_log(cork_now ? "Corking" : "Uncorking");
 241
 242                 corked = cork_now;
 243             }
 244 #endif
 245         }
 246
 247         /* Spin loop, ugly but normal usleep() is just too badly grained */
 248
 249         tv = now;
 250         while (pa_timeval_diff(pa_gettimeofday(&now), &tv) < 1000)
 251             pa_thread_yield();
 252     }
 253
 254     if (m)
 255         pa_threaded_mainloop_stop(m);
 256
 257     if (stream) {
 258         pa_stream_disconnect(stream);
 259         pa_stream_unref(stream);
 260     }
 261
 262     if (context) {
 263         pa_context_disconnect(context);
 264         pa_context_unref(context);
 265     }
 266
 267     if (m)
 268         pa_threaded_mainloop_free(m);
 269
 270     return 0;
 271 }