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 //#define CORK
  41
  42 static pa_context *context = NULL;
  43 static pa_stream *stream = NULL;
  44 static pa_mainloop_api *mainloop_api = NULL;
  45 static pa_bool_t playback = TRUE;
  46 static pa_usec_t latency = 0;
  47
  48 static void stream_write_cb(pa_stream *p, size_t nbytes, void *userdata) {
  49     /* Just some silence */
  50
  51     for (;;) {
  52         void *data;
  53
  54         pa_assert_se((nbytes = pa_stream_writable_size(p)) != (size_t) -1);
  55
  56         if (nbytes <= 0)
  57             break;
  58
  59         pa_assert_se(pa_stream_begin_write(p, &data, &nbytes) == 0);
  60         pa_memzero(data, nbytes);
  61         pa_assert_se(pa_stream_write(p, data, nbytes, NULL, 0, PA_SEEK_RELATIVE) == 0);
  62     }
  63 }
  64
  65 static void stream_read_cb(pa_stream *p, size_t nbytes, void *userdata) {
  66     /* We don't care about the data, just drop it */
  67
  68     for (;;) {
  69         const void *data;
  70
  71         pa_assert_se((nbytes = pa_stream_readable_size(p)) != (size_t) -1);
  72
  73         if (nbytes <= 0)
  74             break;
  75
  76         pa_assert_se(pa_stream_peek(p, &data, &nbytes) == 0);
  77         pa_assert_se(pa_stream_drop(p) == 0);
  78     }
  79 }
  80
  81 static void stream_latency_cb(pa_stream *p, void *userdata) {
  82 #ifndef INTERPOLATE
  83     pa_operation *o;
  84
  85     o = pa_stream_update_timing_info(p, NULL, NULL);
  86     pa_operation_unref(o);
  87 #endif
  88 }
  89
  90 /* This is called whenever the context status changes */
  91 static void context_state_callback(pa_context *c, void *userdata) {
  92     assert(c);
  93
  94     switch (pa_context_get_state(c)) {
  95         case PA_CONTEXT_CONNECTING:
  96         case PA_CONTEXT_AUTHORIZING:
  97         case PA_CONTEXT_SETTING_NAME:
  98             break;
  99
 100         case PA_CONTEXT_READY: {
 101             pa_stream_flags_t flags = PA_STREAM_AUTO_TIMING_UPDATE;
 102             pa_buffer_attr attr;
 103             static const pa_sample_spec ss = {
 104                 .format = PA_SAMPLE_S16LE,
 105                 .rate = 44100,
 106                 .channels = 2
 107             };
 108
 109             pa_zero(attr);
 110             attr.maxlength = (uint32_t) -1;
 111             attr.tlength = latency > 0 ? (uint32_t) pa_usec_to_bytes(latency, &ss) : (uint32_t) -1;
 112             attr.prebuf = (uint32_t) -1;
 113             attr.minreq = (uint32_t) -1;
 114             attr.fragsize = (uint32_t) -1;
 115
 116 #ifdef INTERPOLATE
 117             flags |= PA_STREAM_INTERPOLATE_TIMING;
 118 #endif
 119
 120             if (latency > 0)
 121                 flags |= PA_STREAM_ADJUST_LATENCY;
 122
 123             fprintf(stderr, "Connection established.\n");
 124
 125             pa_assert_se(stream = pa_stream_new(c, "interpol-test", &ss, NULL));
 126
 127             if (playback) {
 128                 pa_assert_se(pa_stream_connect_playback(stream, NULL, &attr, flags, NULL, NULL) == 0);
 129                 pa_stream_set_write_callback(stream, stream_write_cb, NULL);
 130             } else {
 131                 pa_assert_se(pa_stream_connect_record(stream, NULL, &attr, flags) == 0);
 132                 pa_stream_set_read_callback(stream, stream_read_cb, NULL);
 133             }
 134
 135             pa_stream_set_latency_update_callback(stream, stream_latency_cb, NULL);
 136
 137             break;
 138         }
 139
 140         case PA_CONTEXT_TERMINATED:
 141             break;
 142
 143         case PA_CONTEXT_FAILED:
 144         default:
 145             fprintf(stderr, "Context error: %s\n", pa_strerror(pa_context_errno(c)));
 146             abort();
 147     }
 148 }
 149
 150 int main(int argc, char *argv[]) {
 151     pa_threaded_mainloop* m = NULL;
 152     int k;
 153     struct timeval start, last_info = { 0, 0 };
 154     pa_usec_t old_t = 0, old_rtc = 0;
 155 #ifdef CORK
 156     pa_bool_t corked = FALSE;
 157 #endif
 158
 159     pa_log_set_level(PA_LOG_DEBUG);
 160
 161     playback = argc <= 1 || !pa_streq(argv[1], "-r");
 162
 163     latency =
 164         (argc >= 2 && !pa_streq(argv[1], "-r")) ? atoi(argv[1]) :
 165         (argc >= 3 ? atoi(argv[2]) : 0);
 166
 167     /* Set up a new main loop */
 168     pa_assert_se(m = pa_threaded_mainloop_new());
 169     pa_assert_se(mainloop_api = pa_threaded_mainloop_get_api(m));
 170     pa_assert_se(context = pa_context_new(mainloop_api, argv[0]));
 171
 172     pa_context_set_state_callback(context, context_state_callback, NULL);
 173
 174     pa_assert_se(pa_context_connect(context, NULL, 0, NULL) >= 0);
 175
 176     pa_gettimeofday(&start);
 177
 178     pa_assert_se(pa_threaded_mainloop_start(m) >= 0);
 179
 180 /* #ifdef CORK */
 181     for (k = 0; k < 20000; k++)
 182 /* #else */
 183 /*     for (k = 0; k < 2000; k++) */
 184 /* #endif */
 185     {
 186         pa_bool_t success = FALSE, changed = FALSE;
 187         pa_usec_t t, rtc, d;
 188         struct timeval now, tv;
 189         pa_bool_t playing = FALSE;
 190
 191         pa_threaded_mainloop_lock(m);
 192
 193         if (stream) {
 194             const pa_timing_info *info;
 195
 196             if (pa_stream_get_time(stream, &t) >= 0 &&
 197                 pa_stream_get_latency(stream, &d, NULL) >= 0)
 198                 success = TRUE;
 199
 200             if ((info = pa_stream_get_timing_info(stream))) {
 201                 if (memcmp(&last_info, &info->timestamp, sizeof(struct timeval))) {
 202                     changed = TRUE;
 203                     last_info = info->timestamp;
 204                 }
 205                 if (info->playing)
 206                     playing = TRUE;
 207             }
 208         }
 209
 210         pa_threaded_mainloop_unlock(m);
 211
 212         pa_gettimeofday(&now);
 213
 214         if (success) {
 215 #ifdef CORK
 216             pa_bool_t cork_now;
 217 #endif
 218             rtc = pa_timeval_diff(&now, &start);
 219             printf("%i\t%llu\t%llu\t%llu\t%llu\t%lli\t%u\t%u\t%llu\t%llu\n", k,
 220                    (unsigned long long) rtc,
 221                    (unsigned long long) t,
 222                    (unsigned long long) (rtc-old_rtc),
 223                    (unsigned long long) (t-old_t),
 224                    (signed long long) rtc - (signed long long) t,
 225                    changed,
 226                    playing,
 227                    (unsigned long long) latency,
 228                    (unsigned long long) d);
 229
 230             fflush(stdout);
 231             old_t = t;
 232             old_rtc = rtc;
 233
 234 #ifdef CORK
 235             cork_now = (rtc / (2*PA_USEC_PER_SEC)) % 2 == 1;
 236
 237             if (corked != cork_now) {
 238                 pa_threaded_mainloop_lock(m);
 239                 pa_operation_unref(pa_stream_cork(stream, cork_now, NULL, NULL));
 240                 pa_threaded_mainloop_unlock(m);
 241
 242                 pa_log(cork_now ? "Corking" : "Uncorking");
 243
 244                 corked = cork_now;
 245             }
 246 #endif
 247         }
 248
 249         /* Spin loop, ugly but normal usleep() is just too badly grained */
 250
 251         tv = now;
 252         while (pa_timeval_diff(pa_gettimeofday(&now), &tv) < 1000)
 253             pa_thread_yield();
 254     }
 255
 256     if (m)
 257         pa_threaded_mainloop_stop(m);
 258
 259     if (stream) {
 260         pa_stream_disconnect(stream);
 261         pa_stream_unref(stream);
 262     }
 263
 264     if (context) {
 265         pa_context_disconnect(context);
 266         pa_context_unref(context);
 267     }
 268
 269     if (m)
 270         pa_threaded_mainloop_free(m);
 271
 272     return 0;
 273 }