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 <errno.h>
  26 #include <unistd.h>
  27 #include <assert.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <math.h>
  31
  32 #include <pulse/pulseaudio.h>
  33 #include <pulse/mainloop.h>
  34
  35 #define NSTREAMS 4
  36 #define SINE_HZ 440
  37 #define SAMPLE_HZ 8000
  38
  39 static pa_context *context = NULL;
  40 static pa_stream *streams[NSTREAMS];
  41 static pa_mainloop_api *mainloop_api = NULL;
  42
  43 static float data[SAMPLE_HZ]; /* one second space */
  44
  45 static int n_streams_ready = 0;
  46
  47 static const pa_buffer_attr buffer_attr = {
  48     .maxlength = SAMPLE_HZ*sizeof(float)*NSTREAMS, /* exactly space for the entire play time */
  49     .tlength = (uint32_t) -1,
  50     .prebuf = 0, /* Setting prebuf to 0 guarantees us the streams will run synchronously, no matter what */
  51     .minreq = (uint32_t) -1,
  52     .fragsize = 0
  53 };
  54
  55 static void nop_free_cb(void *p) {}
  56
  57 static void underflow_cb(struct pa_stream *s, void *userdata) {
  58     int i = (int) (long) userdata;
  59
  60     fprintf(stderr, "Stream %i finished\n", i);
  61
  62     if (++n_streams_ready >= 2*NSTREAMS) {
  63         fprintf(stderr, "We're done\n");
  64         mainloop_api->quit(mainloop_api, 0);
  65     }
  66 }
  67
  68 /* This routine is called whenever the stream state changes */
  69 static void stream_state_callback(pa_stream *s, void *userdata) {
  70     assert(s);
  71
  72     switch (pa_stream_get_state(s)) {
  73         case PA_STREAM_UNCONNECTED:
  74         case PA_STREAM_CREATING:
  75         case PA_STREAM_TERMINATED:
  76             break;
  77
  78         case PA_STREAM_READY: {
  79
  80             int r, i = (int) (long) userdata;
  81
  82             fprintf(stderr, "Writing data to stream %i.\n", i);
  83
  84             r = pa_stream_write(s, data, sizeof(data), nop_free_cb, (int64_t) sizeof(data) * (int64_t) i, PA_SEEK_ABSOLUTE);
  85             assert(r == 0);
  86
  87             /* Be notified when this stream is drained */
  88             pa_stream_set_underflow_callback(s, underflow_cb, userdata);
  89
  90             /* All streams have been set up, let's go! */
  91             if (++n_streams_ready >= NSTREAMS) {
  92                 fprintf(stderr, "Uncorking\n");
  93                 pa_operation_unref(pa_stream_cork(s, 0, NULL, NULL));
  94             }
  95
  96             break;
  97         }
  98
  99         default:
 100         case PA_STREAM_FAILED:
 101             fprintf(stderr, "Stream error: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 102             abort();
 103     }
 104 }
 105
 106 /* This is called whenever the context status changes */
 107 static void context_state_callback(pa_context *c, void *userdata) {
 108     assert(c);
 109
 110     switch (pa_context_get_state(c)) {
 111         case PA_CONTEXT_CONNECTING:
 112         case PA_CONTEXT_AUTHORIZING:
 113         case PA_CONTEXT_SETTING_NAME:
 114             break;
 115
 116         case PA_CONTEXT_READY: {
 117
 118             int i;
 119             fprintf(stderr, "Connection established.\n");
 120
 121             for (i = 0; i < NSTREAMS; i++) {
 122                 char name[64];
 123                 pa_format_info *formats[1];
 124
 125                 formats[0] = pa_format_info_new();
 126                 formats[0]->encoding = PA_ENCODING_PCM;
 127                 pa_format_info_set_sample_format(formats[0], PA_SAMPLE_FLOAT32);
 128                 pa_format_info_set_rate(formats[0], SAMPLE_HZ);
 129                 pa_format_info_set_channels(formats[0], 1);
 130
 131                 fprintf(stderr, "Creating stream %i\n", i);
 132
 133                 snprintf(name, sizeof(name), "stream #%i", i);
 134
 135                 streams[i] = pa_stream_new_extended(c, name, formats, 1, NULL);
 136                 assert(streams[i]);
 137                 pa_stream_set_state_callback(streams[i], stream_state_callback, (void*) (long) i);
 138                 pa_stream_connect_playback(streams[i], NULL, &buffer_attr, PA_STREAM_START_CORKED, NULL, i == 0 ? NULL : streams[0]);
 139
 140                 pa_format_info_free(formats[0]);
 141             }
 142
 143             break;
 144         }
 145
 146         case PA_CONTEXT_TERMINATED:
 147             mainloop_api->quit(mainloop_api, 0);
 148             break;
 149
 150         case PA_CONTEXT_FAILED:
 151         default:
 152             fprintf(stderr, "Context error: %s\n", pa_strerror(pa_context_errno(c)));
 153             abort();
 154     }
 155 }
 156
 157 int main(int argc, char *argv[]) {
 158     pa_mainloop* m = NULL;
 159     int i, ret = 1;
 160
 161     for (i = 0; i < SAMPLE_HZ; i++)
 162         data[i] = (float) sin(((double) i/SAMPLE_HZ)*2*M_PI*SINE_HZ)/2;
 163
 164     for (i = 0; i < NSTREAMS; i++)
 165         streams[i] = NULL;
 166
 167     /* Set up a new main loop */
 168     m = pa_mainloop_new();
 169     assert(m);
 170
 171     mainloop_api = pa_mainloop_get_api(m);
 172
 173     context = pa_context_new(mainloop_api, argv[0]);
 174     assert(context);
 175
 176     pa_context_set_state_callback(context, context_state_callback, NULL);
 177
 178     /* Connect the context */
 179     if (pa_context_connect(context, NULL, 0, NULL) < 0) {
 180         fprintf(stderr, "pa_context_connect() failed.\n");
 181         goto quit;
 182     }
 183
 184     if (pa_mainloop_run(m, &ret) < 0)
 185         fprintf(stderr, "pa_mainloop_run() failed.\n");
 186
 187 quit:
 188     pa_context_unref(context);
 189
 190     for (i = 0; i < NSTREAMS; i++)
 191         if (streams[i])
 192             pa_stream_unref(streams[i]);
 193
 194     pa_mainloop_free(m);
 195
 196     return ret;
 197 }