Mypal/media/libcubeb/tests/test_devices.cpp

/*
 * Copyright © 2015 Haakon Sporsheim <haakon.sporsheim@telenordigital.com>
 *
 * This program is made available under an ISC-style license.  See the
 * accompanying file LICENSE for details.
 */

/* libcubeb enumerate device test/example.
 * Prints out a list of devices enumerated. */
#ifdef NDEBUG
#undef NDEBUG
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "cubeb/cubeb.h"


static void
print_device_info(cubeb_device_info * info, FILE * f)
{
  char devfmts[64] = "";
  const char * devtype, * devstate, * devdeffmt;

  switch (info->type) {
    case CUBEB_DEVICE_TYPE_INPUT:
      devtype = "input";
      break;
    case CUBEB_DEVICE_TYPE_OUTPUT:
      devtype = "output";
      break;
    case CUBEB_DEVICE_TYPE_UNKNOWN:
    default:
      devtype = "unknown?";
      break;
  };

  switch (info->state) {
    case CUBEB_DEVICE_STATE_DISABLED:
      devstate = "disabled";
      break;
    case CUBEB_DEVICE_STATE_UNPLUGGED:
      devstate = "unplugged";
      break;
    case CUBEB_DEVICE_STATE_ENABLED:
      devstate = "enabled";
      break;
    default:
      devstate = "unknown?";
      break;
  };

  switch (info->default_format) {
    case CUBEB_DEVICE_FMT_S16LE:
      devdeffmt = "S16LE";
      break;
    case CUBEB_DEVICE_FMT_S16BE:
      devdeffmt = "S16BE";
      break;
    case CUBEB_DEVICE_FMT_F32LE:
      devdeffmt = "F32LE";
      break;
    case CUBEB_DEVICE_FMT_F32BE:
      devdeffmt = "F32BE";
      break;
    default:
      devdeffmt = "unknown?";
      break;
  };

  if (info->format & CUBEB_DEVICE_FMT_S16LE)
    strcat(devfmts, " S16LE");
  if (info->format & CUBEB_DEVICE_FMT_S16BE)
    strcat(devfmts, " S16BE");
  if (info->format & CUBEB_DEVICE_FMT_F32LE)
    strcat(devfmts, " F32LE");
  if (info->format & CUBEB_DEVICE_FMT_F32BE)
    strcat(devfmts, " F32BE");

  fprintf(f,
      "dev: \"%s\"%s\n"
      "\tName:    \"%s\"\n"
      "\tGroup:   \"%s\"\n"
      "\tVendor:  \"%s\"\n"
      "\tType:    %s\n"
      "\tState:   %s\n"
      "\tCh:      %u\n"
      "\tFormat:  %s (0x%x) (default: %s)\n"
      "\tRate:    %u - %u (default: %u)\n"
      "\tLatency: lo %ums, hi %ums\n",
      info->device_id, info->preferred ? " (PREFERRED)" : "",
      info->friendly_name, info->group_id, info->vendor_name,
      devtype, devstate, info->max_channels,
      (devfmts[0] == ' ') ? &devfmts[1] : devfmts,
      (unsigned int)info->format, devdeffmt,
      info->min_rate, info->max_rate, info->default_rate,
      info->latency_lo_ms, info->latency_hi_ms);
}

static void
print_device_collection(cubeb_device_collection * collection, FILE * f)
{
  uint32_t i;

  for (i = 0; i < collection->count; i++)
    print_device_info(collection->device[i], f);
}

static int
run_enumerate_devices(void)
{
  int r = CUBEB_OK;
  cubeb * ctx = NULL;
  cubeb_device_collection * collection = NULL;

  r = cubeb_init(&ctx, "Cubeb audio test");
  if (r != CUBEB_OK) {
    fprintf(stderr, "Error initializing cubeb library\n");
    return r;
  }

  fprintf(stdout, "Enumerating input devices for backend %s\n",
      cubeb_get_backend_id(ctx));

  r = cubeb_enumerate_devices(ctx, CUBEB_DEVICE_TYPE_INPUT, &collection);
  if (r != CUBEB_OK) {
    fprintf(stderr, "Error enumerating devices %d\n", r);
    goto cleanup;
  }

  fprintf(stdout, "Found %u input devices\n", collection->count);
  print_device_collection(collection, stdout);
  cubeb_device_collection_destroy(collection);

  fprintf(stdout, "Enumerating output devices for backend %s\n",
          cubeb_get_backend_id(ctx));

  r = cubeb_enumerate_devices(ctx, CUBEB_DEVICE_TYPE_OUTPUT, &collection);
  if (r != CUBEB_OK) {
    fprintf(stderr, "Error enumerating devices %d\n", r);
    goto cleanup;
  }

  fprintf(stdout, "Found %u output devices\n", collection->count);
  print_device_collection(collection, stdout);
  cubeb_device_collection_destroy(collection);

cleanup:
  cubeb_destroy(ctx);
  return r;
}

int main(int argc, char *argv[])
{
  int ret;

  ret = run_enumerate_devices();

  return ret;
}