test_device_changed_callback.cpp

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/*

 * Copyright © 2018 Mozilla Foundation

 * This program is made available under an ISC-style license.  See the

 * accompanying file LICENSE for details.

*/

/* libcubeb api/function test. Check behaviors of registering device changed

 * callbacks for the streams. */

#include "gtest/gtest.h"

#if !defined(_XOPEN_SOURCE)

#define _XOPEN_SOURCE 600

#endif

#include "cubeb/cubeb.h"

#include <memory>

#include <stdio.h>

// #define ENABLE_NORMAL_LOG

// #define ENABLE_VERBOSE_LOG

#include "common.h"

#define SAMPLE_FREQUENCY 48000

#define STREAM_FORMAT CUBEB_SAMPLE_FLOAT32LE

#define INPUT_CHANNELS 1

#define INPUT_LAYOUT CUBEB_LAYOUT_MONO

#define OUTPUT_CHANNELS 2

#define OUTPUT_LAYOUT CUBEB_LAYOUT_STEREO

long

data_callback(cubeb_stream * stream, void * user, const void * inputbuffer,

              void * outputbuffer, long nframes)

  return 0;

void

state_callback(cubeb_stream * stream, void * user, cubeb_state state)

void

device_changed_callback(void * user)

  fprintf(stderr, "device changed callback\n");

  ASSERT_TRUE(false) << "Error: device changed callback"

                        " called without changing devices";

void

test_registering_null_callback_twice(cubeb_stream * stream)

  int r = cubeb_stream_register_device_changed_callback(stream, nullptr);

  if (r == CUBEB_ERROR_NOT_SUPPORTED) {

    return;

  ASSERT_EQ(r, CUBEB_OK) << "Error registering null device changed callback";

  r = cubeb_stream_register_device_changed_callback(stream, nullptr);

  ASSERT_EQ(r, CUBEB_OK)

      << "Error registering null device changed callback again";

void

test_registering_and_unregistering_callback(cubeb_stream * stream)

  int r = cubeb_stream_register_device_changed_callback(

      stream, device_changed_callback);

  if (r == CUBEB_ERROR_NOT_SUPPORTED) {

    return;

  ASSERT_EQ(r, CUBEB_OK) << "Error registering device changed callback";

  r = cubeb_stream_register_device_changed_callback(stream, nullptr);

  ASSERT_EQ(r, CUBEB_OK) << "Error unregistering device changed callback";

TEST(cubeb, device_changed_callbacks)

  cubeb * ctx;

  cubeb_stream * stream;

  cubeb_stream_params input_params;

  cubeb_stream_params output_params;

  int r = CUBEB_OK;

  uint32_t latency_frames = 0;

  r = common_init(&ctx, "Cubeb duplex example with device change");

  ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";

  if (!can_run_audio_input_test(ctx)) {

    return;

  std::unique_ptr<cubeb, decltype(&cubeb_destroy)> cleanup_cubeb_at_exit(

      ctx, cubeb_destroy);

  /* typical user-case: mono input, stereo output, low latency. */

  input_params.format = STREAM_FORMAT;

  input_params.rate = SAMPLE_FREQUENCY;

  input_params.channels = INPUT_CHANNELS;

  input_params.layout = INPUT_LAYOUT;

  input_params.prefs = CUBEB_STREAM_PREF_NONE;

  output_params.format = STREAM_FORMAT;

  output_params.rate = SAMPLE_FREQUENCY;

  output_params.channels = OUTPUT_CHANNELS;

  output_params.layout = OUTPUT_LAYOUT;

  output_params.prefs = CUBEB_STREAM_PREF_NONE;

  r = cubeb_get_min_latency(ctx, &output_params, &latency_frames);

  ASSERT_EQ(r, CUBEB_OK) << "Could not get minimal latency";

  r = cubeb_stream_init(ctx, &stream, "Cubeb duplex", NULL, &input_params, NULL,

                        &output_params, latency_frames, data_callback,

                        state_callback, nullptr);

  ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";

  test_registering_null_callback_twice(stream);

  test_registering_and_unregistering_callback(stream);

  cubeb_stream_destroy(stream);

#undef SAMPLE_FREQUENCY

#undef STREAM_FORMAT

#undef INPUT_CHANNELS

#undef INPUT_LAYOUT

#undef OUTPUT_CHANNELS

#undef OUTPUT_LAYOUT