code.delx.au - pulseaudio/blob - src/tests/extended-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 #define NSTREAMS 4
  38 #define SINE_HZ 440
  39 #define SAMPLE_HZ 8000
  40
  41 static pa_context *context = NULL;
  42 static pa_stream *streams[NSTREAMS];
  43 static pa_mainloop_api *mainloop_api = NULL;
  44
  45 static float data[SAMPLE_HZ]; /* one second space */
  46
  47 static int n_streams_ready = 0;
  48
  49 static const pa_buffer_attr buffer_attr = {
  50     .maxlength = SAMPLE_HZ*sizeof(float)*NSTREAMS, /* exactly space for the entire play time */
  51     .tlength = (uint32_t) -1,
  52     .prebuf = 0, /* Setting prebuf to 0 guarantees us the the streams will run synchronously, no matter what */
  53     .minreq = (uint32_t) -1,
  54     .fragsize = 0
  55 };
  56
  57 static void nop_free_cb(void *p) {}
  58
  59 static void underflow_cb(struct pa_stream *s, void *userdata) {
  60     int i = (int) (long) userdata;
  61
  62     fprintf(stderr, "Stream %i finished\n", i);
  63
  64     if (++n_streams_ready >= 2*NSTREAMS) {
  65         fprintf(stderr, "We're done\n");
  66         mainloop_api->quit(mainloop_api, 0);
  67     }
  68 }
  69
  70 /* This routine is called whenever the stream state changes */
  71 static void stream_state_callback(pa_stream *s, void *userdata) {
  72     assert(s);
  73
  74     switch (pa_stream_get_state(s)) {
  75         case PA_STREAM_UNCONNECTED:
  76         case PA_STREAM_CREATING:
  77         case PA_STREAM_TERMINATED:
  78             break;
  79
  80         case PA_STREAM_READY: {
  81
  82             int r, i = (int) (long) userdata;
  83
  84             fprintf(stderr, "Writing data to stream %i.\n", i);
  85
  86             r = pa_stream_write(s, data, sizeof(data), nop_free_cb, (int64_t) sizeof(data) * (int64_t) i, PA_SEEK_ABSOLUTE);
  87             assert(r == 0);
  88
  89             /* Be notified when this stream is drained */
  90             pa_stream_set_underflow_callback(s, underflow_cb, userdata);
  91
  92             /* All streams have been set up, let's go! */
  93             if (++n_streams_ready >= NSTREAMS) {
  94                 fprintf(stderr, "Uncorking\n");
  95                 pa_operation_unref(pa_stream_cork(s, 0, NULL, NULL));
  96             }
  97
  98             break;
  99         }
 100
 101         default:
 102         case PA_STREAM_FAILED:
 103             fprintf(stderr, "Stream error: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 104             abort();
 105     }
 106 }
 107
 108 /* This is called whenever the context status changes */
 109 static void context_state_callback(pa_context *c, void *userdata) {
 110     assert(c);
 111
 112     switch (pa_context_get_state(c)) {
 113         case PA_CONTEXT_CONNECTING:
 114         case PA_CONTEXT_AUTHORIZING:
 115         case PA_CONTEXT_SETTING_NAME:
 116             break;
 117
 118         case PA_CONTEXT_READY: {
 119
 120             int i;
 121             fprintf(stderr, "Connection established.\n");
 122
 123             for (i = 0; i < NSTREAMS; i++) {
 124                 char name[64];
 125                 pa_format_info *formats[1];
 126
 127                 formats[0] = pa_format_info_new();
 128                 formats[0]->encoding = PA_ENCODING_PCM;
 129                 pa_format_info_set_sample_format(formats[0], PA_SAMPLE_FLOAT32);
 130                 pa_format_info_set_rate(formats[0], SAMPLE_HZ);
 131                 pa_format_info_set_channels(formats[0], 1);
 132
 133                 fprintf(stderr, "Creating stream %i\n", i);
 134
 135                 snprintf(name, sizeof(name), "stream #%i", i);
 136
 137                 streams[i] = pa_stream_new_extended(c, name, formats, 1, NULL);
 138                 assert(streams[i]);
 139                 pa_stream_set_state_callback(streams[i], stream_state_callback, (void*) (long) i);
 140                 pa_stream_connect_playback(streams[i], NULL, &buffer_attr, PA_STREAM_START_CORKED, NULL, i == 0 ? NULL : streams[0]);
 141
 142                 pa_format_info_free(formats[0]);
 143             }
 144
 145             break;
 146         }
 147
 148         case PA_CONTEXT_TERMINATED:
 149             mainloop_api->quit(mainloop_api, 0);
 150             break;
 151
 152         case PA_CONTEXT_FAILED:
 153         default:
 154             fprintf(stderr, "Context error: %s\n", pa_strerror(pa_context_errno(c)));
 155             abort();
 156     }
 157 }
 158
 159 int main(int argc, char *argv[]) {
 160     pa_mainloop* m = NULL;
 161     int i, ret = 0;
 162
 163     for (i = 0; i < SAMPLE_HZ; i++)
 164         data[i] = (float) sin(((double) i/SAMPLE_HZ)*2*M_PI*SINE_HZ)/2;
 165
 166     for (i = 0; i < NSTREAMS; i++)
 167         streams[i] = NULL;
 168
 169     /* Set up a new main loop */
 170     m = pa_mainloop_new();
 171     assert(m);
 172
 173     mainloop_api = pa_mainloop_get_api(m);
 174
 175     context = pa_context_new(mainloop_api, argv[0]);
 176     assert(context);
 177
 178     pa_context_set_state_callback(context, context_state_callback, NULL);
 179
 180     /* Connect the context */
 181     if (pa_context_connect(context, NULL, 0, NULL) < 0) {
 182         fprintf(stderr, "pa_context_connect() failed.\n");
 183         goto quit;
 184     }
 185
 186     if (pa_mainloop_run(m, &ret) < 0)
 187         fprintf(stderr, "pa_mainloop_run() failed.\n");
 188
 189 quit:
 190     pa_context_unref(context);
 191
 192     for (i = 0; i < NSTREAMS; i++)
 193         if (streams[i])
 194             pa_stream_unref(streams[i]);
 195
 196     pa_mainloop_free(m);
 197
 198     return ret;
 199 }