// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <algorithm>
#include <stdio.h>
#include <gtest/gtest.h>
#include <map>

extern "C" {
#include "audio_thread.h"
#include "cras_iodev.h"
#include "cras_iodev_list.h"
#include "cras_observer_ops.h"
#include "cras_ramp.h"
#include "cras_rstream.h"
#include "cras_system_state.h"
#include "cras_tm.h"
#include "stream_list.h"
#include "utlist.h"
}

namespace {

struct cras_server_state server_state_stub;
struct cras_server_state *server_state_update_begin_return;

/* Data for stubs. */
static struct cras_observer_ops *observer_ops;
static int add_stream_called;
static int rm_stream_called;
static unsigned int set_node_attr_called;
static cras_iodev *audio_thread_remove_streams_active_dev;
static cras_iodev *audio_thread_set_active_dev_val;
static int audio_thread_set_active_dev_called;
static cras_iodev *audio_thread_add_open_dev_dev;
static int audio_thread_add_open_dev_called;
static int audio_thread_rm_open_dev_called;
static int audio_thread_is_dev_open_ret;
static struct audio_thread thread;
static struct cras_iodev loopback_input;
static int cras_iodev_close_called;
static struct cras_iodev *cras_iodev_close_dev;
static struct cras_iodev dummy_hotword_iodev;
static struct cras_iodev dummy_empty_iodev[2];
static stream_callback *stream_add_cb;
static stream_callback *stream_rm_cb;
static struct cras_rstream *stream_list_get_ret;
static int server_stream_create_called;
static int server_stream_destroy_called;
static int audio_thread_drain_stream_return;
static int audio_thread_drain_stream_called;
static int cras_tm_create_timer_called;
static int cras_tm_cancel_timer_called;
static void (*cras_tm_timer_cb)(struct cras_timer *t, void *data);
static void *cras_tm_timer_cb_data;
static struct timespec clock_gettime_retspec;
static struct cras_iodev *device_enabled_dev;
static int device_enabled_count;
static struct cras_iodev *device_disabled_dev;
static int device_disabled_count;
static void *device_enabled_cb_data;
static void *device_disabled_cb_data;
static struct cras_rstream *audio_thread_add_stream_stream;
static struct cras_iodev *audio_thread_add_stream_dev;
static struct cras_iodev *audio_thread_disconnect_stream_dev;
static int audio_thread_add_stream_called;
static unsigned update_active_node_called;
static struct cras_iodev *update_active_node_iodev_val[5];
static unsigned update_active_node_node_idx_val[5];
static unsigned update_active_node_dev_enabled_val[5];
static size_t cras_observer_add_called;
static size_t cras_observer_remove_called;
static size_t cras_observer_notify_nodes_called;
static size_t cras_observer_notify_active_node_called;
static size_t cras_observer_notify_output_node_volume_called;
static size_t cras_observer_notify_node_left_right_swapped_called;
static size_t cras_observer_notify_input_node_gain_called;
static int cras_iodev_open_called;
static int cras_iodev_open_ret[8];
static int set_mute_called;
static std::vector<struct cras_iodev*> set_mute_dev_vector;
static struct cras_iodev *audio_thread_dev_start_ramp_dev;
static int audio_thread_dev_start_ramp_called;
static enum CRAS_IODEV_RAMP_REQUEST audio_thread_dev_start_ramp_req ;
static std::map<const struct cras_iodev*, enum CRAS_IODEV_STATE> cras_iodev_state_ret;
static std::map<const struct cras_iodev*, int> cras_iodev_has_pinned_stream_ret;
static struct cras_rstream *audio_thread_disconnect_stream_stream;
static int audio_thread_disconnect_stream_called;
static int cras_iodev_is_zero_volume_ret;

void dummy_update_active_node(struct cras_iodev *iodev,
                              unsigned node_idx,
                              unsigned dev_enabled) {
}

int device_in_vector(std::vector<struct cras_iodev*> v, struct cras_iodev *dev)
{
  return std::find(v.begin(), v.end(), dev) != v.end();
}

class IoDevTestSuite : public testing::Test {
  protected:
    virtual void SetUp() {
      cras_iodev_list_reset();

      cras_iodev_close_called = 0;
      stream_list_get_ret = 0;
      server_stream_create_called = 0;
      server_stream_destroy_called = 0;
      audio_thread_drain_stream_return = 0;
      audio_thread_drain_stream_called = 0;
      cras_tm_create_timer_called = 0;
      cras_tm_cancel_timer_called = 0;

      audio_thread_disconnect_stream_called = 0;
      audio_thread_disconnect_stream_stream = NULL;
      audio_thread_is_dev_open_ret = 0;
      cras_iodev_has_pinned_stream_ret.clear();

      sample_rates_[0] = 44100;
      sample_rates_[1] = 48000;
      sample_rates_[2] = 0;

      channel_counts_[0] = 2;
      channel_counts_[1] = 0;

      memset(&d1_, 0, sizeof(d1_));
      memset(&d2_, 0, sizeof(d2_));
      memset(&d3_, 0, sizeof(d3_));

      memset(&node1, 0, sizeof(node1));
      memset(&node2, 0, sizeof(node2));
      memset(&node3, 0, sizeof(node3));

      d1_.set_volume = NULL;
      d1_.set_capture_gain = NULL;
      d1_.set_capture_mute = NULL;
      d1_.update_supported_formats = NULL;
      d1_.update_active_node = update_active_node;
      d1_.format = NULL;
      d1_.direction = CRAS_STREAM_OUTPUT;
      d1_.info.idx = -999;
      d1_.nodes = &node1;
      d1_.active_node = &node1;
      strcpy(d1_.info.name, "d1");
      d1_.supported_rates = sample_rates_;
      d1_.supported_channel_counts = channel_counts_;
      d2_.set_volume = NULL;
      d2_.set_capture_gain = NULL;
      d2_.set_capture_mute = NULL;
      d2_.update_supported_formats = NULL;
      d2_.update_active_node = update_active_node;
      d2_.format = NULL;
      d2_.direction = CRAS_STREAM_OUTPUT;
      d2_.info.idx = -999;
      d2_.nodes = &node2;
      d2_.active_node = &node2;
      strcpy(d2_.info.name, "d2");
      d2_.supported_rates = sample_rates_;
      d2_.supported_channel_counts = channel_counts_;
      d3_.set_volume = NULL;
      d3_.set_capture_gain = NULL;
      d3_.set_capture_mute = NULL;
      d3_.update_supported_formats = NULL;
      d3_.update_active_node = update_active_node;
      d3_.format = NULL;
      d3_.direction = CRAS_STREAM_OUTPUT;
      d3_.info.idx = -999;
      d3_.nodes = &node3;
      d3_.active_node = &node3;
      strcpy(d3_.info.name, "d3");
      d3_.supported_rates = sample_rates_;
      d3_.supported_channel_counts = channel_counts_;

      loopback_input.set_volume = NULL;
      loopback_input.set_capture_gain = NULL;
      loopback_input.set_capture_mute = NULL;
      loopback_input.update_supported_formats = NULL;
      loopback_input.update_active_node = update_active_node;
      loopback_input.format = NULL;
      loopback_input.direction = CRAS_STREAM_INPUT;
      loopback_input.info.idx = -999;
      loopback_input.nodes = &node3;
      loopback_input.active_node = &node3;
      strcpy(loopback_input.info.name, "loopback_input");
      loopback_input.supported_rates = sample_rates_;
      loopback_input.supported_channel_counts = channel_counts_;

      server_state_update_begin_return = &server_state_stub;

      /* Reset stub data. */
      add_stream_called = 0;
      rm_stream_called = 0;
      set_node_attr_called = 0;
      audio_thread_rm_open_dev_called = 0;
      audio_thread_add_open_dev_called = 0;
      audio_thread_set_active_dev_called = 0;
      audio_thread_add_stream_called = 0;
      update_active_node_called = 0;
      cras_observer_add_called = 0;
      cras_observer_remove_called = 0;
      cras_observer_notify_nodes_called = 0;
      cras_observer_notify_active_node_called = 0;
      cras_observer_notify_output_node_volume_called = 0;
      cras_observer_notify_node_left_right_swapped_called = 0;
      cras_observer_notify_input_node_gain_called = 0;
      cras_iodev_open_called = 0;
      memset(cras_iodev_open_ret, 0, sizeof(cras_iodev_open_ret));
      set_mute_called = 0;
      set_mute_dev_vector.clear();
      audio_thread_dev_start_ramp_dev = NULL;
      audio_thread_dev_start_ramp_called = 0;
      audio_thread_dev_start_ramp_req =
          CRAS_IODEV_RAMP_REQUEST_UP_START_PLAYBACK;
      cras_iodev_is_zero_volume_ret = 0;

      dummy_empty_iodev[0].state = CRAS_IODEV_STATE_CLOSE;
      dummy_empty_iodev[1].state = CRAS_IODEV_STATE_CLOSE;
    }

    virtual void TearDown() {
      cras_iodev_list_reset();
    }

    static void set_volume_1(struct cras_iodev* iodev) {
      set_volume_1_called_++;
    }

    static void set_capture_gain_1(struct cras_iodev* iodev) {
      set_capture_gain_1_called_++;
    }

    static void set_capture_mute_1(struct cras_iodev* iodev) {
      set_capture_mute_1_called_++;
    }

    static void update_active_node(struct cras_iodev *iodev,
                                   unsigned node_idx,
                                   unsigned dev_enabled) {
      int i = update_active_node_called++ % 5;
      update_active_node_iodev_val[i] = iodev;
      update_active_node_node_idx_val[i] = node_idx;
      update_active_node_dev_enabled_val[i] = dev_enabled;
    }

    struct cras_iodev d1_;
    struct cras_iodev d2_;
    struct cras_iodev d3_;
    size_t sample_rates_[3];
    size_t channel_counts_[2];
    static int set_volume_1_called_;
    static int set_capture_gain_1_called_;
    static int set_capture_mute_1_called_;
    struct cras_ionode node1, node2, node3;
};

int IoDevTestSuite::set_volume_1_called_;
int IoDevTestSuite::set_capture_gain_1_called_;
int IoDevTestSuite::set_capture_mute_1_called_;

// Check that Init registers observer client. */
TEST_F(IoDevTestSuite, InitSetup) {
  cras_iodev_list_init();
  EXPECT_EQ(1, cras_observer_add_called);
  cras_iodev_list_deinit();
  EXPECT_EQ(1, cras_observer_remove_called);
}

/* Check that the suspend alert from cras_system will trigger suspend
 * and resume call of all iodevs. */
TEST_F(IoDevTestSuite, SetSuspendResume) {
  struct cras_rstream rstream, rstream2, rstream3;
  struct cras_rstream *stream_list = NULL;
  int rc;

  memset(&rstream, 0, sizeof(rstream));
  memset(&rstream2, 0, sizeof(rstream2));
  memset(&rstream3, 0, sizeof(rstream3));

  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  audio_thread_add_open_dev_called = 0;
  cras_iodev_list_add_active_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 1));
  DL_APPEND(stream_list, &rstream);
  stream_add_cb(&rstream);
  EXPECT_EQ(1, audio_thread_add_stream_called);
  EXPECT_EQ(1, audio_thread_add_open_dev_called);

  DL_APPEND(stream_list, &rstream2);
  stream_add_cb(&rstream2);
  EXPECT_EQ(2, audio_thread_add_stream_called);

  audio_thread_rm_open_dev_called = 0;
  observer_ops->suspend_changed(NULL, 1);
  EXPECT_EQ(1, audio_thread_rm_open_dev_called);

  /* Test disable/enable dev won't cause add_stream to audio_thread. */
  audio_thread_add_stream_called = 0;
  cras_iodev_list_disable_dev(&d1_, false);
  cras_iodev_list_enable_dev(&d1_);
  EXPECT_EQ(0, audio_thread_add_stream_called);

  audio_thread_drain_stream_return = 0;
  DL_DELETE(stream_list, &rstream2);
  stream_rm_cb(&rstream2);
  EXPECT_EQ(1, audio_thread_drain_stream_called);

  /* Test stream_add_cb won't cause add_stream to audio_thread. */
  audio_thread_add_stream_called = 0;
  DL_APPEND(stream_list, &rstream3);
  stream_add_cb(&rstream3);
  EXPECT_EQ(0, audio_thread_add_stream_called);

  audio_thread_add_open_dev_called = 0;
  audio_thread_add_stream_called = 0;
  stream_list_get_ret = stream_list;
  observer_ops->suspend_changed(NULL, 0);
  EXPECT_EQ(1, audio_thread_add_open_dev_called);
  EXPECT_EQ(2, audio_thread_add_stream_called);
  EXPECT_EQ(&rstream3, audio_thread_add_stream_stream);

  cras_iodev_list_deinit();
  EXPECT_EQ(3, cras_observer_notify_active_node_called);
}

TEST_F(IoDevTestSuite, InitDevFailShouldEnableFallback) {
  int rc;
  struct cras_rstream rstream;
  struct cras_rstream *stream_list = NULL;

  memset(&rstream, 0, sizeof(rstream));
  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 0));

  cras_iodev_open_ret[0] = -5;
  cras_iodev_open_ret[1] = 0;

  DL_APPEND(stream_list, &rstream);
  stream_list_get_ret = stream_list;
  stream_add_cb(&rstream);
  /* open dev called twice, one for fallback device. */
  EXPECT_EQ(2, cras_iodev_open_called);
  EXPECT_EQ(1, audio_thread_add_stream_called);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, InitDevWithEchoRef) {
  int rc;
  struct cras_rstream rstream;
  struct cras_rstream *stream_list = NULL;

  memset(&rstream, 0, sizeof(rstream));
  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  d1_.echo_reference_dev = &d2_;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  d2_.direction = CRAS_STREAM_INPUT;
  snprintf(d2_.active_node->name, CRAS_NODE_NAME_BUFFER_SIZE, "echo ref");
  rc = cras_iodev_list_add_input(&d2_);
  ASSERT_EQ(0, rc);

  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 0));
  /* No close call happened, because no stream exists. */
  EXPECT_EQ(0, cras_iodev_close_called);

  cras_iodev_open_ret[1] = 0;

  DL_APPEND(stream_list, &rstream);
  stream_list_get_ret = stream_list;
  stream_add_cb(&rstream);

  EXPECT_EQ(1, cras_iodev_open_called);
  EXPECT_EQ(1, server_stream_create_called);
  EXPECT_EQ(1, audio_thread_add_stream_called);

  DL_DELETE(stream_list, &rstream);
  stream_list_get_ret = stream_list;
  stream_rm_cb(&rstream);

  clock_gettime_retspec.tv_sec = 11;
  clock_gettime_retspec.tv_nsec = 0;
  cras_tm_timer_cb(NULL, NULL);

  EXPECT_EQ(1, cras_iodev_close_called);
  EXPECT_EQ(1, server_stream_destroy_called);

  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, SelectNodeOpenFailShouldScheduleRetry) {
  struct cras_rstream rstream;
  struct cras_rstream *stream_list = NULL;
  int rc;

  memset(&rstream, 0, sizeof(rstream));
  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  d2_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d2_);
  ASSERT_EQ(0, rc);

  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 1));
  DL_APPEND(stream_list, &rstream);
  stream_list_get_ret = stream_list;
  stream_add_cb(&rstream);

  /* Select node triggers: fallback open, d1 close, d2 open, fallback close. */
  cras_iodev_close_called = 0;
  cras_iodev_open_called = 0;
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d2_.info.idx, 1));
  EXPECT_EQ(2, cras_iodev_close_called);
  EXPECT_EQ(2, cras_iodev_open_called);
  EXPECT_EQ(0, cras_tm_create_timer_called);
  EXPECT_EQ(0, cras_tm_cancel_timer_called);

  /* Test that if select to d1 and open d1 fail, fallback doesn't close. */
  cras_iodev_open_called = 0;
  cras_iodev_open_ret[0] = 0;
  cras_iodev_open_ret[1] = -5;
  cras_iodev_open_ret[2] = 0;
  cras_tm_timer_cb = NULL;
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 1));
  EXPECT_EQ(3, cras_iodev_close_called);
  EXPECT_EQ(&d2_, cras_iodev_close_dev);
  EXPECT_EQ(2, cras_iodev_open_called);
  EXPECT_EQ(0, cras_tm_cancel_timer_called);

  /* Assert a timer is scheduled to retry open. */
  EXPECT_NE((void *)NULL, cras_tm_timer_cb);
  EXPECT_EQ(1, cras_tm_create_timer_called);

  audio_thread_add_stream_called = 0;
  cras_tm_timer_cb(NULL, cras_tm_timer_cb_data);
  EXPECT_EQ(3, cras_iodev_open_called);
  EXPECT_EQ(1, audio_thread_add_stream_called);

  /* Retry open success will close fallback dev. */
  EXPECT_EQ(4, cras_iodev_close_called);
  EXPECT_EQ(0, cras_tm_cancel_timer_called);

  /* Select to d2 and fake an open failure. */
  cras_iodev_close_called = 0;
  cras_iodev_open_called = 0;
  cras_iodev_open_ret[0] = 0;
  cras_iodev_open_ret[1] = -5;
  cras_iodev_open_ret[2] = 0;
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d2_.info.idx, 1));
  EXPECT_EQ(1, cras_iodev_close_called);
  EXPECT_EQ(&d1_, cras_iodev_close_dev);
  EXPECT_EQ(2, cras_tm_create_timer_called);
  EXPECT_NE((void *)NULL, cras_tm_timer_cb);

  /* Select to another iodev should cancel the timer. */
  memset(cras_iodev_open_ret, 0, sizeof(cras_iodev_open_ret));
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d2_.info.idx, 1));
  EXPECT_EQ(1, cras_tm_cancel_timer_called);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, InitDevFailShouldScheduleRetry) {
  int rc;
  struct cras_rstream rstream;
  struct cras_rstream *stream_list = NULL;

  memset(&rstream, 0, sizeof(rstream));
  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 0));

  cras_iodev_open_ret[0] = -5;
  cras_iodev_open_ret[1] = 0;
  cras_tm_timer_cb = NULL;
  DL_APPEND(stream_list, &rstream);
  stream_list_get_ret = stream_list;
  stream_add_cb(&rstream);
  /* open dev called twice, one for fallback device. */
  EXPECT_EQ(2, cras_iodev_open_called);
  EXPECT_EQ(1, audio_thread_add_stream_called);

  EXPECT_NE((void *)NULL, cras_tm_timer_cb);
  EXPECT_EQ(1, cras_tm_create_timer_called);

  /* If retry still fail, won't schedule more retry. */
  cras_iodev_open_ret[2] = -5;
  cras_tm_timer_cb(NULL, cras_tm_timer_cb_data);
  EXPECT_EQ(1, cras_tm_create_timer_called);
  EXPECT_EQ(1, audio_thread_add_stream_called);

  cras_tm_timer_cb = NULL;
  cras_iodev_open_ret[3] = -5;
  stream_add_cb(&rstream);
  EXPECT_NE((void *)NULL, cras_tm_timer_cb);
  EXPECT_EQ(2, cras_tm_create_timer_called);

  cras_iodev_list_rm_output(&d1_);
  EXPECT_EQ(1, cras_tm_cancel_timer_called);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, PinnedStreamInitFailShouldScheduleRetry) {
  int rc;
  struct cras_rstream rstream;
  struct cras_rstream *stream_list = NULL;

  memset(&rstream, 0, sizeof(rstream));
  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  rstream.is_pinned = 1;
  rstream.pinned_dev_idx = d1_.info.idx;

  cras_iodev_open_ret[0] = -5;
  cras_iodev_open_ret[1] = 0;
  cras_tm_timer_cb = NULL;
  DL_APPEND(stream_list, &rstream);
  stream_list_get_ret = stream_list;
  stream_add_cb(&rstream);
  /* Init pinned dev fail, not proceed to add stream. */
  EXPECT_EQ(1, cras_iodev_open_called);
  EXPECT_EQ(0, audio_thread_add_stream_called);

  EXPECT_NE((void *)NULL, cras_tm_timer_cb);
  EXPECT_EQ(1, cras_tm_create_timer_called);

  cras_tm_timer_cb(NULL, cras_tm_timer_cb_data);
  EXPECT_EQ(2, cras_iodev_open_called);
  EXPECT_EQ(1, audio_thread_add_stream_called);

  cras_iodev_list_rm_output(&d1_);
  cras_iodev_list_deinit();
}

static void device_enabled_cb(struct cras_iodev *dev, void *cb_data)
{
  device_enabled_dev = dev;
  device_enabled_count++;
  device_enabled_cb_data = cb_data;
}

static void device_disabled_cb(struct cras_iodev *dev, void *cb_data)
{
  device_disabled_dev = dev;
  device_disabled_count++;
  device_disabled_cb_data = cb_data;
}

TEST_F(IoDevTestSuite, SelectNode) {
  struct cras_rstream rstream, rstream2;
  int rc;

  memset(&rstream, 0, sizeof(rstream));
  memset(&rstream2, 0, sizeof(rstream2));

  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  node1.idx = 1;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  d2_.direction = CRAS_STREAM_OUTPUT;
  node2.idx = 2;
  rc = cras_iodev_list_add_output(&d2_);
  ASSERT_EQ(0, rc);

  audio_thread_add_open_dev_called = 0;
  audio_thread_rm_open_dev_called = 0;

  device_enabled_count = 0;
  device_disabled_count = 0;

  EXPECT_EQ(0, cras_iodev_list_set_device_enabled_callback(
      device_enabled_cb, device_disabled_cb, (void *)0xABCD));

  cras_iodev_list_add_active_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 1));

  EXPECT_EQ(1, device_enabled_count);
  EXPECT_EQ(1, cras_observer_notify_active_node_called);
  EXPECT_EQ(&d1_, cras_iodev_list_get_first_enabled_iodev(CRAS_STREAM_OUTPUT));

  // There should be a disable device call for the fallback device.
  // But no close call actually happened, because no stream exists.
  EXPECT_EQ(0, audio_thread_rm_open_dev_called);
  EXPECT_EQ(1, device_disabled_count);
  EXPECT_NE(&d1_, device_disabled_dev);

  DL_APPEND(stream_list_get_ret, &rstream);
  stream_add_cb(&rstream);

  EXPECT_EQ(1, audio_thread_add_stream_called);
  EXPECT_EQ(1, audio_thread_add_open_dev_called);

  DL_APPEND(stream_list_get_ret, &rstream2);
  stream_add_cb(&rstream2);

  EXPECT_EQ(2, audio_thread_add_stream_called);
  EXPECT_EQ(1, audio_thread_add_open_dev_called);

  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d2_.info.idx, 2));

  // Additional enabled devices: fallback device, d2_.
  EXPECT_EQ(3, device_enabled_count);
  // Additional disabled devices: d1_, fallback device.
  EXPECT_EQ(3, device_disabled_count);
  EXPECT_EQ(2, audio_thread_rm_open_dev_called);
  EXPECT_EQ(2, cras_observer_notify_active_node_called);
  EXPECT_EQ(&d2_, cras_iodev_list_get_first_enabled_iodev(CRAS_STREAM_OUTPUT));

  // For each stream, the stream is added for fallback device and d2_.
  EXPECT_EQ(6, audio_thread_add_stream_called);

  EXPECT_EQ(0, cras_iodev_list_set_device_enabled_callback(NULL, NULL, NULL));
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, SelectPreviouslyEnabledNode) {
  struct cras_rstream rstream;
  int rc;

  memset(&rstream, 0, sizeof(rstream));

  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  node1.idx = 1;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  d2_.direction = CRAS_STREAM_OUTPUT;
  node2.idx = 2;
  rc = cras_iodev_list_add_output(&d2_);
  ASSERT_EQ(0, rc);

  audio_thread_add_open_dev_called = 0;
  audio_thread_rm_open_dev_called = 0;
  device_enabled_count = 0;
  device_disabled_count = 0;

  EXPECT_EQ(0, cras_iodev_list_set_device_enabled_callback(
      device_enabled_cb, device_disabled_cb, (void *)0xABCD));

  // Add an active node.
  cras_iodev_list_add_active_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 1));

  EXPECT_EQ(1, device_enabled_count);
  EXPECT_EQ(1, cras_observer_notify_active_node_called);
  EXPECT_EQ(&d1_, cras_iodev_list_get_first_enabled_iodev(CRAS_STREAM_OUTPUT));

  // There should be a disable device call for the fallback device.
  EXPECT_EQ(1, device_disabled_count);
  EXPECT_NE(&d1_, device_disabled_dev);
  EXPECT_NE(&d2_, device_disabled_dev);

  DL_APPEND(stream_list_get_ret, &rstream);
  stream_add_cb(&rstream);

  EXPECT_EQ(1, audio_thread_add_open_dev_called);
  EXPECT_EQ(1, audio_thread_add_stream_called);

  // Add a second active node.
  cras_iodev_list_add_active_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d2_.info.idx, 2));

  EXPECT_EQ(2, device_enabled_count);
  EXPECT_EQ(1, device_disabled_count);
  EXPECT_EQ(2, cras_observer_notify_active_node_called);
  EXPECT_EQ(&d1_, cras_iodev_list_get_first_enabled_iodev(CRAS_STREAM_OUTPUT));

  EXPECT_EQ(2, audio_thread_add_open_dev_called);
  EXPECT_EQ(2, audio_thread_add_stream_called);
  EXPECT_EQ(0, audio_thread_rm_open_dev_called);

  // Select the second added active node - the initially added node should get
  // disabled.
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d2_.info.idx, 2));

  EXPECT_EQ(2, device_enabled_count);
  EXPECT_EQ(2, device_disabled_count);
  EXPECT_EQ(3, cras_observer_notify_active_node_called);

  EXPECT_EQ(&d2_, cras_iodev_list_get_first_enabled_iodev(CRAS_STREAM_OUTPUT));
  EXPECT_EQ(&d1_, device_disabled_dev);

  EXPECT_EQ(2, audio_thread_add_stream_called);
  EXPECT_EQ(2, audio_thread_add_open_dev_called);
  EXPECT_EQ(1, audio_thread_rm_open_dev_called);

  EXPECT_EQ(0, cras_iodev_list_set_device_enabled_callback(NULL, NULL, NULL));
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, UpdateActiveNode) {
  int rc;

  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  d2_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d2_);
  ASSERT_EQ(0, rc);

  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d2_.info.idx, 1));

  EXPECT_EQ(1, update_active_node_called);
  EXPECT_EQ(&d2_, update_active_node_iodev_val[0]);
  EXPECT_EQ(1, update_active_node_node_idx_val[0]);
  EXPECT_EQ(1, update_active_node_dev_enabled_val[0]);

  /* Fake the active node idx on d2_, and later assert this node is
   * called for update_active_node when d2_ disabled. */
  d2_.active_node->idx = 2;
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 0));

  EXPECT_EQ(3, update_active_node_called);
  EXPECT_EQ(&d2_, update_active_node_iodev_val[1]);
  EXPECT_EQ(&d1_, update_active_node_iodev_val[2]);
  EXPECT_EQ(2, update_active_node_node_idx_val[1]);
  EXPECT_EQ(0, update_active_node_node_idx_val[2]);
  EXPECT_EQ(0, update_active_node_dev_enabled_val[1]);
  EXPECT_EQ(1, update_active_node_dev_enabled_val[2]);
  EXPECT_EQ(2, cras_observer_notify_active_node_called);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, SelectNonExistingNode) {
  int rc;
  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);

  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 0));
  EXPECT_EQ(1, d1_.is_enabled);

  /* Select non-existing node should disable all devices. */
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(2, 1));
  EXPECT_EQ(0, d1_.is_enabled);
  EXPECT_EQ(2, cras_observer_notify_active_node_called);
  cras_iodev_list_deinit();
}

// Devices with the wrong direction should be rejected.
TEST_F(IoDevTestSuite, AddWrongDirection) {
  int rc;

  rc = cras_iodev_list_add_input(&d1_);
  EXPECT_EQ(-EINVAL, rc);
  d1_.direction = CRAS_STREAM_INPUT;
  rc = cras_iodev_list_add_output(&d1_);
  EXPECT_EQ(-EINVAL, rc);
}

// Test adding/removing an iodev to the list.
TEST_F(IoDevTestSuite, AddRemoveOutput) {
  struct cras_iodev_info *dev_info;
  int rc;

  rc = cras_iodev_list_add_output(&d1_);
  EXPECT_EQ(0, rc);
  // Test can't insert same iodev twice.
  rc = cras_iodev_list_add_output(&d1_);
  EXPECT_NE(0, rc);
  // Test insert a second output.
  rc = cras_iodev_list_add_output(&d2_);
  EXPECT_EQ(0, rc);

  // Test that it is removed.
  rc = cras_iodev_list_rm_output(&d1_);
  EXPECT_EQ(0, rc);
  // Test that we can't remove a dev twice.
  rc = cras_iodev_list_rm_output(&d1_);
  EXPECT_NE(0, rc);
  // Should be 1 dev now.
  rc = cras_iodev_list_get_outputs(&dev_info);
  EXPECT_EQ(1, rc);
  free(dev_info);
  // Passing null should return the number of outputs.
  rc = cras_iodev_list_get_outputs(NULL);
  EXPECT_EQ(1, rc);
  // Remove other dev.
  rc = cras_iodev_list_rm_output(&d2_);
  EXPECT_EQ(0, rc);
  // Should be 0 devs now.
  rc = cras_iodev_list_get_outputs(&dev_info);
  EXPECT_EQ(0, rc);
  free(dev_info);
  EXPECT_EQ(0, cras_observer_notify_active_node_called);
}

// Test output_mute_changed callback.
TEST_F(IoDevTestSuite, OutputMuteChangedToMute) {
  cras_iodev_list_init();

  // d1_ and d3_ have ramp while d2_ does not have ramp.
  d1_.ramp = reinterpret_cast<cras_ramp*>(0x123);
  d2_.ramp = NULL;
  d3_.ramp = reinterpret_cast<cras_ramp*>(0x124);

  cras_iodev_list_add_output(&d1_);
  cras_iodev_list_add_output(&d2_);
  cras_iodev_list_add_output(&d3_);

  // d1_ and d2_ are enabled.
  cras_iodev_list_enable_dev(&d1_);
  cras_iodev_list_enable_dev(&d2_);

  // Assume d1 and d2 devices are in normal run.
  cras_iodev_state_ret[&d1_] = CRAS_IODEV_STATE_NORMAL_RUN;
  cras_iodev_state_ret[&d2_] = CRAS_IODEV_STATE_NORMAL_RUN;
  cras_iodev_state_ret[&d3_] = CRAS_IODEV_STATE_CLOSE;

  // Execute the callback.
  observer_ops->output_mute_changed(NULL, 0, 1, 0);

  // d1_ should set mute state through audio_thread_dev_start_ramp.
  EXPECT_EQ(&d1_, audio_thread_dev_start_ramp_dev);
  EXPECT_EQ(1, audio_thread_dev_start_ramp_called);
  EXPECT_EQ(CRAS_IODEV_RAMP_REQUEST_DOWN_MUTE, audio_thread_dev_start_ramp_req);

  // d2_ should set mute state right away.
  // d3_ should set mute state right away without calling ramp
  // because it is not enabled.
  EXPECT_EQ(2, set_mute_called);
  EXPECT_EQ(2, set_mute_dev_vector.size());
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d2_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d3_));

  // Assume d1_ should mute for volume.
  // It should not use ramp.
  cras_iodev_is_zero_volume_ret = 1;

  // Clear stub data of interest.
  audio_thread_dev_start_ramp_dev = NULL;
  audio_thread_dev_start_ramp_called = 0;
  set_mute_called = 0;
  set_mute_dev_vector.clear();

  // Execute the callback.
  observer_ops->output_mute_changed(NULL, 0, 1, 0);

  // Verify three devices all set mute state right away.
  EXPECT_EQ(NULL, audio_thread_dev_start_ramp_dev);
  EXPECT_EQ(0, audio_thread_dev_start_ramp_called);
  EXPECT_EQ(3, set_mute_called);
  EXPECT_EQ(3, set_mute_dev_vector.size());
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d1_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d2_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d3_));

  // Assume d1_ is changed to no_stream run state
  // It should not use ramp.
  cras_iodev_state_ret[&d1_] = CRAS_IODEV_STATE_NO_STREAM_RUN;

  // Clear stub data of interest.
  audio_thread_dev_start_ramp_dev = NULL;
  audio_thread_dev_start_ramp_called = 0;
  set_mute_called = 0;
  set_mute_dev_vector.clear();

  // Execute the callback.
  observer_ops->output_mute_changed(NULL, 0, 1, 0);

  // Verify three devices all set mute state right away.
  EXPECT_EQ(NULL, audio_thread_dev_start_ramp_dev);
  EXPECT_EQ(0, audio_thread_dev_start_ramp_called);
  EXPECT_EQ(3, set_mute_called);
  EXPECT_EQ(3, set_mute_dev_vector.size());
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d1_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d2_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d3_));
  cras_iodev_list_deinit();
}

// Test output_mute_changed callback.
TEST_F(IoDevTestSuite, OutputMuteChangedToUnmute) {
  cras_iodev_list_init();

  // d1_ and d3_ have ramp while d2_ does not have ramp.
  d1_.ramp = reinterpret_cast<cras_ramp*>(0x123);
  d2_.ramp = NULL;
  d3_.ramp = reinterpret_cast<cras_ramp*>(0x124);

  cras_iodev_list_add_output(&d1_);
  cras_iodev_list_add_output(&d2_);
  cras_iodev_list_add_output(&d3_);

  // d1_ and d2_ are enabled.
  cras_iodev_list_enable_dev(&d1_);
  cras_iodev_list_enable_dev(&d2_);

  // Assume d1 and d2 devices are in normal run.
  cras_iodev_state_ret[&d1_] = CRAS_IODEV_STATE_NORMAL_RUN;
  cras_iodev_state_ret[&d2_] = CRAS_IODEV_STATE_NORMAL_RUN;
  cras_iodev_state_ret[&d3_] = CRAS_IODEV_STATE_CLOSE;

  // Execute the callback.
  observer_ops->output_mute_changed(NULL, 0, 0, 0);

  // d1_ should set mute state through audio_thread_dev_start_ramp.
  EXPECT_EQ(&d1_, audio_thread_dev_start_ramp_dev);
  EXPECT_EQ(1, audio_thread_dev_start_ramp_called);
  EXPECT_EQ(CRAS_IODEV_RAMP_REQUEST_UP_UNMUTE,
            audio_thread_dev_start_ramp_req);

  // d2_ should set mute state right away.
  // d3_ should set mute state right away without calling ramp
  // because it is not enabled.
  EXPECT_EQ(2, set_mute_called);
  EXPECT_EQ(2, set_mute_dev_vector.size());
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d2_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d3_));

  // Assume d1_ should mute for volume.
  // It should not use ramp.
  cras_iodev_is_zero_volume_ret = 1;

  // Clear stub data of interest.
  audio_thread_dev_start_ramp_dev = NULL;
  audio_thread_dev_start_ramp_called = 0;
  set_mute_called = 0;
  set_mute_dev_vector.clear();

  // Execute the callback.
  observer_ops->output_mute_changed(NULL, 0, 1, 0);

  // Verify three devices all set mute state right away.
  EXPECT_EQ(NULL, audio_thread_dev_start_ramp_dev);
  EXPECT_EQ(0, audio_thread_dev_start_ramp_called);
  EXPECT_EQ(3, set_mute_called);
  EXPECT_EQ(3, set_mute_dev_vector.size());
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d1_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d2_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d3_));

  // Assume d1_ is changed to no_stream run state
  // It should not use ramp.
  cras_iodev_state_ret[&d1_] = CRAS_IODEV_STATE_NO_STREAM_RUN;

  // Clear stub data of interest.
  audio_thread_dev_start_ramp_dev = NULL;
  audio_thread_dev_start_ramp_called = 0;
  set_mute_called = 0;
  set_mute_dev_vector.clear();

  // Execute the callback.
  observer_ops->output_mute_changed(NULL, 0, 1, 0);

  // Verify three devices all set mute state right away.
  EXPECT_EQ(NULL, audio_thread_dev_start_ramp_dev);
  EXPECT_EQ(0, audio_thread_dev_start_ramp_called);
  EXPECT_EQ(3, set_mute_called);
  EXPECT_EQ(3, set_mute_dev_vector.size());
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d1_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d2_));
  ASSERT_TRUE(device_in_vector(set_mute_dev_vector, &d3_));
  cras_iodev_list_deinit();
}

// Test enable/disable an iodev.
TEST_F(IoDevTestSuite, EnableDisableDevice) {
  device_enabled_count = 0;
  device_disabled_count = 0;

  EXPECT_EQ(0, cras_iodev_list_add_output(&d1_));

  EXPECT_EQ(0, cras_iodev_list_set_device_enabled_callback(
      device_enabled_cb, device_disabled_cb, (void *)0xABCD));

  // Enable a device.
  cras_iodev_list_enable_dev(&d1_);
  EXPECT_EQ(&d1_, device_enabled_dev);
  EXPECT_EQ((void *)0xABCD, device_enabled_cb_data);
  EXPECT_EQ(1, device_enabled_count);
  EXPECT_EQ(&d1_, cras_iodev_list_get_first_enabled_iodev(CRAS_STREAM_OUTPUT));

  // Disable a device.
  cras_iodev_list_disable_dev(&d1_, false);
  EXPECT_EQ(&d1_, device_disabled_dev);
  EXPECT_EQ(1, device_disabled_count);
  EXPECT_EQ((void *)0xABCD, device_disabled_cb_data);

  EXPECT_EQ(0, cras_iodev_list_set_device_enabled_callback(
      device_enabled_cb, device_disabled_cb, (void *)0xCDEF));
  EXPECT_EQ(2, cras_observer_notify_active_node_called);

  EXPECT_EQ(0, cras_iodev_list_set_device_enabled_callback(NULL, NULL, NULL));
}

// Test adding/removing an input dev to the list.
TEST_F(IoDevTestSuite, AddRemoveInput) {
  struct cras_iodev_info *dev_info;
  int rc, i;
  uint32_t found_mask;

  d1_.direction = CRAS_STREAM_INPUT;
  d2_.direction = CRAS_STREAM_INPUT;

  cras_iodev_list_init();

  // Check no devices exist initially.
  rc = cras_iodev_list_get_inputs(NULL);
  EXPECT_EQ(0, rc);

  rc = cras_iodev_list_add_input(&d1_);
  EXPECT_EQ(0, rc);
  EXPECT_GE(d1_.info.idx, 0);
  // Test can't insert same iodev twice.
  rc = cras_iodev_list_add_input(&d1_);
  EXPECT_NE(0, rc);
  // Test insert a second input.
  rc = cras_iodev_list_add_input(&d2_);
  EXPECT_EQ(0, rc);
  EXPECT_GE(d2_.info.idx, 1);
  // make sure shared state was updated.
  EXPECT_EQ(2, server_state_stub.num_input_devs);
  EXPECT_EQ(d2_.info.idx, server_state_stub.input_devs[0].idx);
  EXPECT_EQ(d1_.info.idx, server_state_stub.input_devs[1].idx);

  // List the outputs.
  rc = cras_iodev_list_get_inputs(&dev_info);
  EXPECT_EQ(2, rc);
  if (rc == 2) {
    found_mask = 0;
    for (i = 0; i < rc; i++) {
      uint32_t idx = dev_info[i].idx;
      EXPECT_EQ(0, (found_mask & (1 << idx)));
      found_mask |= (1 << idx);
    }
  }
  if (rc > 0)
    free(dev_info);

  // Test that it is removed.
  rc = cras_iodev_list_rm_input(&d1_);
  EXPECT_EQ(0, rc);
  // Test that we can't remove a dev twice.
  rc = cras_iodev_list_rm_input(&d1_);
  EXPECT_NE(0, rc);
  // Should be 1 dev now.
  rc = cras_iodev_list_get_inputs(&dev_info);
  EXPECT_EQ(1, rc);
  free(dev_info);
  // Remove other dev.
  rc = cras_iodev_list_rm_input(&d2_);
  EXPECT_EQ(0, rc);
  // Shouldn't be any devices left.
  rc = cras_iodev_list_get_inputs(&dev_info);
  EXPECT_EQ(0, rc);
  free(dev_info);

  cras_iodev_list_deinit();
}

// Test adding/removing an input dev to the list without updating the server
// state.
TEST_F(IoDevTestSuite, AddRemoveInputNoSem) {
  int rc;

  d1_.direction = CRAS_STREAM_INPUT;
  d2_.direction = CRAS_STREAM_INPUT;

  server_state_update_begin_return = NULL;

  rc = cras_iodev_list_add_input(&d1_);
  EXPECT_EQ(0, rc);
  EXPECT_GE(d1_.info.idx, 0);
  rc = cras_iodev_list_add_input(&d2_);
  EXPECT_EQ(0, rc);
  EXPECT_GE(d2_.info.idx, 1);

  EXPECT_EQ(0, cras_iodev_list_rm_input(&d1_));
  EXPECT_EQ(0, cras_iodev_list_rm_input(&d2_));
}

// Test removing the last input.
TEST_F(IoDevTestSuite, RemoveLastInput) {
  struct cras_iodev_info *dev_info;
  int rc;

  d1_.direction = CRAS_STREAM_INPUT;
  d2_.direction = CRAS_STREAM_INPUT;

  cras_iodev_list_init();

  rc = cras_iodev_list_add_input(&d1_);
  EXPECT_EQ(0, rc);
  rc = cras_iodev_list_add_input(&d2_);
  EXPECT_EQ(0, rc);

  // Test that it is removed.
  rc = cras_iodev_list_rm_input(&d1_);
  EXPECT_EQ(0, rc);
  // Add it back.
  rc = cras_iodev_list_add_input(&d1_);
  EXPECT_EQ(0, rc);
  // And again.
  rc = cras_iodev_list_rm_input(&d1_);
  EXPECT_EQ(0, rc);
  // Add it back.
  rc = cras_iodev_list_add_input(&d1_);
  EXPECT_EQ(0, rc);
  // Remove other dev.
  rc = cras_iodev_list_rm_input(&d2_);
  EXPECT_EQ(0, rc);
  // Add it back.
  rc = cras_iodev_list_add_input(&d2_);
  EXPECT_EQ(0, rc);
  // Remove both.
  rc = cras_iodev_list_rm_input(&d2_);
  EXPECT_EQ(0, rc);
  rc = cras_iodev_list_rm_input(&d1_);
  EXPECT_EQ(0, rc);
  // Shouldn't be any devices left.
  rc = cras_iodev_list_get_inputs(&dev_info);
  EXPECT_EQ(0, rc);

  cras_iodev_list_deinit();
}

// Test nodes changed notification is sent.
TEST_F(IoDevTestSuite, NodesChangedNotification) {
  cras_iodev_list_init();
  EXPECT_EQ(1, cras_observer_add_called);

  cras_iodev_list_notify_nodes_changed();
  EXPECT_EQ(1, cras_observer_notify_nodes_called);

  cras_iodev_list_deinit();
  EXPECT_EQ(1, cras_observer_remove_called);
}

// Test callback function for left right swap mode is set and called.
TEST_F(IoDevTestSuite, NodesLeftRightSwappedCallback) {

  struct cras_iodev iodev;
  struct cras_ionode ionode;
  memset(&iodev, 0, sizeof(iodev));
  memset(&ionode, 0, sizeof(ionode));
  ionode.dev = &iodev;
  cras_iodev_list_notify_node_left_right_swapped(&ionode);
  EXPECT_EQ(1, cras_observer_notify_node_left_right_swapped_called);
}

// Test callback function for volume and gain are set and called.
TEST_F(IoDevTestSuite, VolumeGainCallback) {

  struct cras_iodev iodev;
  struct cras_ionode ionode;
  memset(&iodev, 0, sizeof(iodev));
  memset(&ionode, 0, sizeof(ionode));
  ionode.dev = &iodev;
  cras_iodev_list_notify_node_volume(&ionode);
  cras_iodev_list_notify_node_capture_gain(&ionode);
  EXPECT_EQ(1, cras_observer_notify_output_node_volume_called);
  EXPECT_EQ(1, cras_observer_notify_input_node_gain_called);
}

TEST_F(IoDevTestSuite, IodevListSetNodeAttr) {
  int rc;

  cras_iodev_list_init();

  // The list is empty now.
  rc = cras_iodev_list_set_node_attr(cras_make_node_id(0, 0),
                                     IONODE_ATTR_PLUGGED, 1);
  EXPECT_LE(rc, 0);
  EXPECT_EQ(0, set_node_attr_called);

  // Add two device, each with one node.
  d1_.direction = CRAS_STREAM_INPUT;
  EXPECT_EQ(0, cras_iodev_list_add_input(&d1_));
  node1.idx = 1;
  EXPECT_EQ(0, cras_iodev_list_add_output(&d2_));
  node2.idx = 2;

  // Mismatch id
  rc = cras_iodev_list_set_node_attr(cras_make_node_id(d2_.info.idx, 1),
                                     IONODE_ATTR_PLUGGED, 1);
  EXPECT_LT(rc, 0);
  EXPECT_EQ(0, set_node_attr_called);

  // Mismatch id
  rc = cras_iodev_list_set_node_attr(cras_make_node_id(d1_.info.idx, 2),
                                     IONODE_ATTR_PLUGGED, 1);
  EXPECT_LT(rc, 0);
  EXPECT_EQ(0, set_node_attr_called);

  // Correct device id and node id
  rc = cras_iodev_list_set_node_attr(cras_make_node_id(d1_.info.idx, 1),
                                     IONODE_ATTR_PLUGGED, 1);
  EXPECT_EQ(rc, 0);
  EXPECT_EQ(1, set_node_attr_called);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, AddActiveNode) {
  int rc;
  struct cras_rstream rstream;

  memset(&rstream, 0, sizeof(rstream));

  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  d2_.direction = CRAS_STREAM_OUTPUT;
  d3_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);
  rc = cras_iodev_list_add_output(&d2_);
  ASSERT_EQ(0, rc);
  rc = cras_iodev_list_add_output(&d3_);
  ASSERT_EQ(0, rc);

  audio_thread_add_open_dev_called = 0;
  cras_iodev_list_add_active_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d3_.info.idx, 1));
  ASSERT_EQ(audio_thread_add_open_dev_called, 0);
  ASSERT_EQ(audio_thread_rm_open_dev_called, 0);

  // If a stream is added, the device should be opened.
  stream_add_cb(&rstream);
  ASSERT_EQ(audio_thread_add_open_dev_called, 1);
  audio_thread_rm_open_dev_called = 0;
  audio_thread_drain_stream_return = 10;
  stream_rm_cb(&rstream);
  ASSERT_EQ(audio_thread_drain_stream_called, 1);
  ASSERT_EQ(audio_thread_rm_open_dev_called, 0);
  audio_thread_drain_stream_return = 0;
  clock_gettime_retspec.tv_sec = 15;
  clock_gettime_retspec.tv_nsec = 45;
  stream_rm_cb(&rstream);
  ASSERT_EQ(audio_thread_drain_stream_called, 2);
  ASSERT_EQ(0, audio_thread_rm_open_dev_called);
  // Stream should remain open for a while before being closed.
  // Test it is closed after 30 seconds.
  clock_gettime_retspec.tv_sec += 30;
  cras_tm_timer_cb(NULL, NULL);
  ASSERT_EQ(1, audio_thread_rm_open_dev_called);

  audio_thread_rm_open_dev_called = 0;
  cras_iodev_list_rm_output(&d3_);
  ASSERT_EQ(audio_thread_rm_open_dev_called, 0);

  /* Assert active devices was set to default one, when selected device
   * removed. */
  cras_iodev_list_rm_output(&d1_);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, DrainTimerCancel) {
  int rc;
  struct cras_rstream rstream;

  memset(&rstream, 0, sizeof(rstream));

  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  rc = cras_iodev_list_add_output(&d1_);
  EXPECT_EQ(0, rc);

  audio_thread_add_open_dev_called = 0;
  cras_iodev_list_add_active_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 1));
  EXPECT_EQ(0, audio_thread_add_open_dev_called);
  EXPECT_EQ(0, audio_thread_rm_open_dev_called);

  // If a stream is added, the device should be opened.
  stream_add_cb(&rstream);
  EXPECT_EQ(1, audio_thread_add_open_dev_called);

  audio_thread_rm_open_dev_called = 0;
  audio_thread_drain_stream_return = 0;
  clock_gettime_retspec.tv_sec = 15;
  clock_gettime_retspec.tv_nsec = 45;
  stream_rm_cb(&rstream);
  EXPECT_EQ(1, audio_thread_drain_stream_called);
  EXPECT_EQ(0, audio_thread_rm_open_dev_called);

  // Add stream again, make sure device isn't closed after timeout.
  audio_thread_add_open_dev_called = 0;
  stream_add_cb(&rstream);
  EXPECT_EQ(0, audio_thread_add_open_dev_called);

  clock_gettime_retspec.tv_sec += 30;
  cras_tm_timer_cb(NULL, NULL);
  EXPECT_EQ(0, audio_thread_rm_open_dev_called);

  // Remove stream, and check the device is eventually closed.
  audio_thread_rm_open_dev_called = 0;
  audio_thread_drain_stream_called = 0;
  stream_rm_cb(&rstream);
  EXPECT_EQ(1, audio_thread_drain_stream_called);
  EXPECT_EQ(0, audio_thread_rm_open_dev_called);

  clock_gettime_retspec.tv_sec += 30;
  cras_tm_timer_cb(NULL, NULL);
  EXPECT_EQ(1, audio_thread_rm_open_dev_called);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, RemoveThenSelectActiveNode) {
  int rc;
  cras_node_id_t id;
  cras_iodev_list_init();

  d1_.direction = CRAS_STREAM_OUTPUT;
  d2_.direction = CRAS_STREAM_OUTPUT;

  /* d1_ will be the default_output */
  rc = cras_iodev_list_add_output(&d1_);
  ASSERT_EQ(0, rc);
  rc = cras_iodev_list_add_output(&d2_);
  ASSERT_EQ(0, rc);

  /* Test the scenario that the selected active output removed
   * from active dev list, should be able to select back again. */
  id = cras_make_node_id(d2_.info.idx, 1);

  cras_iodev_list_rm_active_node(CRAS_STREAM_OUTPUT, id);
  ASSERT_EQ(audio_thread_rm_open_dev_called, 0);

  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, AddRemovePinnedStream) {
  struct cras_rstream rstream;

  cras_iodev_list_init();

  // Add 2 output devices.
  d1_.direction = CRAS_STREAM_OUTPUT;
  d1_.info.idx = 1;
  EXPECT_EQ(0, cras_iodev_list_add_output(&d1_));
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d1_.info.idx, 0));
  EXPECT_EQ(1, update_active_node_called);
  EXPECT_EQ(&d1_, update_active_node_iodev_val[0]);

  d2_.direction = CRAS_STREAM_OUTPUT;
  d2_.info.idx = 2;
  EXPECT_EQ(0, cras_iodev_list_add_output(&d2_));

  // Setup pinned stream.
  memset(&rstream, 0, sizeof(rstream));
  rstream.is_pinned = 1;
  rstream.pinned_dev_idx = d1_.info.idx;

  // Add pinned stream to d1.
  EXPECT_EQ(0, stream_add_cb(&rstream));
  EXPECT_EQ(1, audio_thread_add_stream_called);
  EXPECT_EQ(&d1_, audio_thread_add_stream_dev);
  EXPECT_EQ(&rstream, audio_thread_add_stream_stream);
  EXPECT_EQ(2, update_active_node_called);
  // Init d1_ because of pinned stream
  EXPECT_EQ(&d1_, update_active_node_iodev_val[1]);

  // Select d2, check pinned stream is not added to d2.
  cras_iodev_list_select_node(CRAS_STREAM_OUTPUT,
      cras_make_node_id(d2_.info.idx, 0));
  EXPECT_EQ(1, audio_thread_add_stream_called);
  EXPECT_EQ(4, update_active_node_called);
  // Unselect d1_ and select to d2_
  EXPECT_EQ(&d1_, update_active_node_iodev_val[2]);
  EXPECT_EQ(&d2_, update_active_node_iodev_val[3]);

  // Remove pinned stream from d1, check d1 is closed after stream removed.
  EXPECT_EQ(0, stream_rm_cb(&rstream));
  EXPECT_EQ(1, cras_iodev_close_called);
  EXPECT_EQ(&d1_, cras_iodev_close_dev);
  EXPECT_EQ(5, update_active_node_called);
  // close pinned device
  EXPECT_EQ(&d1_, update_active_node_iodev_val[4]);

  // Assume dev is already opened, add pin stream should not trigger another
  // update_active_node call, but will trigger audio_thread_add_stream.
  audio_thread_is_dev_open_ret = 1;
  EXPECT_EQ(0, stream_add_cb(&rstream));
  EXPECT_EQ(5, update_active_node_called);
  EXPECT_EQ(2, audio_thread_add_stream_called);

  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, SuspendResumePinnedStream) {
  struct cras_rstream rstream;

  cras_iodev_list_init();

  // Add 2 output devices.
  d1_.direction = CRAS_STREAM_OUTPUT;
  EXPECT_EQ(0, cras_iodev_list_add_output(&d1_));
  d2_.direction = CRAS_STREAM_OUTPUT;
  EXPECT_EQ(0, cras_iodev_list_add_output(&d2_));

  // Setup pinned stream.
  memset(&rstream, 0, sizeof(rstream));
  rstream.is_pinned = 1;
  rstream.pinned_dev_idx = d1_.info.idx;

  // Add pinned stream to d1.
  EXPECT_EQ(0, stream_add_cb(&rstream));
  EXPECT_EQ(1, audio_thread_add_stream_called);
  EXPECT_EQ(&d1_, audio_thread_add_stream_dev);
  EXPECT_EQ(&rstream, audio_thread_add_stream_stream);

  DL_APPEND(stream_list_get_ret, &rstream);

  // Test for suspend

  // Device state enters no_stream after stream is disconnected.
  d1_.state = CRAS_IODEV_STATE_NO_STREAM_RUN;
  // Device has no pinned stream now. But this pinned stream remains in stream_list.
  cras_iodev_has_pinned_stream_ret[&d1_] = 0;

  // Suspend
  observer_ops->suspend_changed(NULL, 1);

  // Verify that stream is disconnected and d1 is closed.
  EXPECT_EQ(1, audio_thread_disconnect_stream_called);
  EXPECT_EQ(&rstream, audio_thread_disconnect_stream_stream);
  EXPECT_EQ(1, cras_iodev_close_called);
  EXPECT_EQ(&d1_, cras_iodev_close_dev);

  // Test for resume
  cras_iodev_open_called = 0;
  audio_thread_add_stream_called = 0;
  audio_thread_add_stream_stream = NULL;
  d1_.state = CRAS_IODEV_STATE_CLOSE;

  // Resume
  observer_ops->suspend_changed(NULL, 0);

  // Verify that device is opened and stream is attached to the device.
  EXPECT_EQ(1, cras_iodev_open_called);
  EXPECT_EQ(1, audio_thread_add_stream_called);
  EXPECT_EQ(&rstream, audio_thread_add_stream_stream);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, HotwordStreamsAddedThenSuspendResume) {
  struct cras_rstream rstream;
  struct cras_rstream *stream_list = NULL;
  cras_iodev_list_init();

  node1.type = CRAS_NODE_TYPE_HOTWORD;
  d1_.direction = CRAS_STREAM_INPUT;
  EXPECT_EQ(0, cras_iodev_list_add_input(&d1_));

  memset(&rstream, 0, sizeof(rstream));
  rstream.is_pinned = 1;
  rstream.pinned_dev_idx = d1_.info.idx;
  rstream.flags = HOTWORD_STREAM;

  /* Add a hotword stream. */
  EXPECT_EQ(0, stream_add_cb(&rstream));
  EXPECT_EQ(1, audio_thread_add_stream_called);
  EXPECT_EQ(&d1_, audio_thread_add_stream_dev);
  EXPECT_EQ(&rstream, audio_thread_add_stream_stream);

  DL_APPEND(stream_list, &rstream);
  stream_list_get_ret = stream_list;

  /* Suspend hotword streams, verify the existing stream disconnects
   * from the hotword device and connects to the empty iodev. */
  EXPECT_EQ(0, cras_iodev_list_suspend_hotword_streams());
  EXPECT_EQ(1, audio_thread_disconnect_stream_called);
  EXPECT_EQ(&rstream, audio_thread_disconnect_stream_stream);
  EXPECT_EQ(&d1_, audio_thread_disconnect_stream_dev);
  EXPECT_EQ(2, audio_thread_add_stream_called);
  EXPECT_EQ(&rstream, audio_thread_add_stream_stream);
  EXPECT_EQ(&dummy_hotword_iodev, audio_thread_add_stream_dev);

  /* Resume hotword streams, verify the stream disconnects from
   * the empty iodev and connects back to the real hotword iodev. */
  EXPECT_EQ(0, cras_iodev_list_resume_hotword_stream());
  EXPECT_EQ(2, audio_thread_disconnect_stream_called);
  EXPECT_EQ(&rstream, audio_thread_disconnect_stream_stream);
  EXPECT_EQ(&dummy_hotword_iodev, audio_thread_disconnect_stream_dev);
  EXPECT_EQ(3, audio_thread_add_stream_called);
  EXPECT_EQ(&rstream, audio_thread_add_stream_stream);
  EXPECT_EQ(&d1_, audio_thread_add_stream_dev);
  cras_iodev_list_deinit();
}

TEST_F(IoDevTestSuite, HotwordStreamsAddedAfterSuspend) {
  struct cras_rstream rstream;
  struct cras_rstream *stream_list = NULL;
  cras_iodev_list_init();

  node1.type = CRAS_NODE_TYPE_HOTWORD;
  d1_.direction = CRAS_STREAM_INPUT;
  EXPECT_EQ(0, cras_iodev_list_add_input(&d1_));

  memset(&rstream, 0, sizeof(rstream));
  rstream.is_pinned = 1;
  rstream.pinned_dev_idx = d1_.info.idx;
  rstream.flags = HOTWORD_STREAM;

  /* Suspends hotword streams before a stream connected. */
  EXPECT_EQ(0, cras_iodev_list_suspend_hotword_streams());
  EXPECT_EQ(0, audio_thread_disconnect_stream_called);
  EXPECT_EQ(0, audio_thread_add_stream_called);

  DL_APPEND(stream_list, &rstream);
  stream_list_get_ret = stream_list;

  /* Hotword stream connected, verify it is added to the empty iodev. */
  EXPECT_EQ(0, stream_add_cb(&rstream));
  EXPECT_EQ(1, audio_thread_add_stream_called);
  EXPECT_EQ(&dummy_hotword_iodev, audio_thread_add_stream_dev);
  EXPECT_EQ(&rstream, audio_thread_add_stream_stream);

  /* Resume hotword streams, now the existing hotword stream should disconnect
   * from the empty iodev and connect to the real hotword iodev. */
  EXPECT_EQ(0, cras_iodev_list_resume_hotword_stream());
  EXPECT_EQ(1, audio_thread_disconnect_stream_called);
  EXPECT_EQ(&rstream, audio_thread_disconnect_stream_stream);
  EXPECT_EQ(&dummy_hotword_iodev, audio_thread_disconnect_stream_dev);
  EXPECT_EQ(2, audio_thread_add_stream_called);
  EXPECT_EQ(&rstream, audio_thread_add_stream_stream);
  EXPECT_EQ(&d1_, audio_thread_add_stream_dev);
  cras_iodev_list_deinit();
}

}  //  namespace

int main(int argc, char **argv) {
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}

extern "C" {

// Stubs

struct cras_server_state *cras_system_state_update_begin() {
  return server_state_update_begin_return;
}

void cras_system_state_update_complete() {
}

struct audio_thread *audio_thread_create() {
  return &thread;
}

int audio_thread_start(struct audio_thread *thread) {
  return 0;
}

void audio_thread_destroy(struct audio_thread *thread) {
}

int audio_thread_set_active_dev(struct audio_thread *thread,
                                 struct cras_iodev *dev) {
  audio_thread_set_active_dev_called++;
  audio_thread_set_active_dev_val = dev;
  return 0;
}

void audio_thread_remove_streams(struct audio_thread *thread,
				 enum CRAS_STREAM_DIRECTION dir) {
  audio_thread_remove_streams_active_dev = audio_thread_set_active_dev_val;
}

int audio_thread_add_open_dev(struct audio_thread *thread,
				 struct cras_iodev *dev)
{
  audio_thread_add_open_dev_dev = dev;
  audio_thread_add_open_dev_called++;
  return 0;
}

int audio_thread_rm_open_dev(struct audio_thread *thread,
                               struct cras_iodev *dev)
{
  audio_thread_rm_open_dev_called++;
  return 0;
}

int audio_thread_is_dev_open(struct audio_thread *thread,
			     struct cras_iodev *dev)
{
  return audio_thread_is_dev_open_ret;
}

int audio_thread_add_stream(struct audio_thread *thread,
                            struct cras_rstream *stream,
                            struct cras_iodev **devs,
                            unsigned int num_devs)
{
  audio_thread_add_stream_called++;
  audio_thread_add_stream_stream = stream;
  audio_thread_add_stream_dev = (num_devs ? devs[0] : NULL);
  return 0;
}

int audio_thread_disconnect_stream(struct audio_thread *thread,
                                   struct cras_rstream *stream,
                                   struct cras_iodev *iodev)
{
  audio_thread_disconnect_stream_called++;
  audio_thread_disconnect_stream_stream = stream;
  audio_thread_disconnect_stream_dev = iodev;
  return 0;
}

int audio_thread_drain_stream(struct audio_thread *thread,
                              struct cras_rstream *stream)
{
	audio_thread_drain_stream_called++;
	return audio_thread_drain_stream_return;
}

void set_node_volume(struct cras_ionode *node, int value)
{
  struct cras_iodev *dev = node->dev;
  unsigned int volume;

  if (dev->direction != CRAS_STREAM_OUTPUT)
    return;

  volume = (unsigned int)std::min(value, 100);
  node->volume = volume;
  if (dev->set_volume)
    dev->set_volume(dev);

  cras_iodev_list_notify_node_volume(node);
}

int cras_iodev_set_node_attr(struct cras_ionode *ionode,
                             enum ionode_attr attr, int value)
{
  set_node_attr_called++;

  switch (attr) {
  case IONODE_ATTR_PLUGGED:
    // plug_node(ionode, value);
    break;
  case IONODE_ATTR_VOLUME:
    set_node_volume(ionode, value);
    break;
  case IONODE_ATTR_CAPTURE_GAIN:
    // set_node_capture_gain(ionode, value);
    break;
  default:
    return -EINVAL;
  }

  return 0;
}

struct cras_iodev *empty_iodev_create(enum CRAS_STREAM_DIRECTION direction,
                                      enum CRAS_NODE_TYPE node_type) {
  struct cras_iodev *dev;
  if (node_type == CRAS_NODE_TYPE_HOTWORD) {
    dev = &dummy_hotword_iodev;
  } else {
    dev = &dummy_empty_iodev[direction];
  }
  dev->direction = direction;
  dev->update_active_node = dummy_update_active_node;
  if (dev->active_node == NULL) {
    struct cras_ionode *node = (struct cras_ionode *)calloc(1, sizeof(*node));
    node->type = node_type;
    dev->active_node = node;
  }
  return dev;
}

void empty_iodev_destroy(struct cras_iodev *iodev) {
  if (iodev->active_node) {
    free(iodev->active_node);
    iodev->active_node = NULL;
  }
}

struct cras_iodev *test_iodev_create(enum CRAS_STREAM_DIRECTION direction,
                                     enum TEST_IODEV_TYPE type) {
  return NULL;
}

void test_iodev_command(struct cras_iodev *iodev,
                        enum CRAS_TEST_IODEV_CMD command,
                        unsigned int data_len,
                        const uint8_t *data) {
}

struct cras_iodev *loopback_iodev_create(enum CRAS_LOOPBACK_TYPE type) {
  return &loopback_input;
}

void loopback_iodev_destroy(struct cras_iodev *iodev) {
}

int cras_iodev_open(struct cras_iodev *iodev, unsigned int cb_level,
                    const struct cras_audio_format *fmt)
{
  if (cras_iodev_open_ret[cras_iodev_open_called] == 0)
    iodev->state = CRAS_IODEV_STATE_OPEN;
  return cras_iodev_open_ret[cras_iodev_open_called++];
}

int cras_iodev_close(struct cras_iodev *iodev) {
  iodev->state = CRAS_IODEV_STATE_CLOSE;
  cras_iodev_close_called++;
  cras_iodev_close_dev = iodev;
  return 0;
}

int cras_iodev_set_format(struct cras_iodev *iodev,
                          const struct cras_audio_format *fmt) {
  return 0;
}

int cras_iodev_set_mute(struct cras_iodev* iodev) {
  set_mute_called++;
  set_mute_dev_vector.push_back(iodev);
  return 0;
}

int cras_iodev_is_zero_volume(const struct cras_iodev *iodev)
{
  return cras_iodev_is_zero_volume_ret;
}

enum CRAS_IODEV_STATE cras_iodev_state(const struct cras_iodev *iodev)
{
	return cras_iodev_state_ret[iodev];
}

int cras_iodev_has_pinned_stream(const struct cras_iodev *dev)
{
  return cras_iodev_has_pinned_stream_ret[dev];
}

struct stream_list *stream_list_create(stream_callback *add_cb,
                                       stream_callback *rm_cb,
                                       stream_create_func *create_cb,
                                       stream_destroy_func *destroy_cb,
				       struct cras_tm *timer_manager) {
  stream_add_cb = add_cb;
  stream_rm_cb = rm_cb;
  return reinterpret_cast<stream_list *>(0xf00);
}

void stream_list_destroy(struct stream_list *list) {
}

struct cras_rstream *stream_list_get(struct stream_list *list) {
  return stream_list_get_ret;
}
void server_stream_create(struct stream_list *stream_list,
			  unsigned int dev_idx)
{
  server_stream_create_called++;
}
void server_stream_destroy(struct stream_list *stream_list,
			   unsigned int dev_idx)
{
  server_stream_destroy_called++;
}

int cras_rstream_create(struct cras_rstream_config *config,
                        struct cras_rstream **stream_out) {
  return 0;
}

void cras_rstream_destroy(struct cras_rstream *rstream) {
}

struct cras_tm *cras_system_state_get_tm() {
  return NULL;
}

struct cras_timer *cras_tm_create_timer(
                struct cras_tm *tm,
                unsigned int ms,
                void (*cb)(struct cras_timer *t, void *data),
                void *cb_data) {
  cras_tm_timer_cb = cb;
  cras_tm_timer_cb_data = cb_data;
  cras_tm_create_timer_called++;
  return reinterpret_cast<struct cras_timer *>(0x404);
}

void cras_tm_cancel_timer(struct cras_tm *tm, struct cras_timer *t) {
  cras_tm_cancel_timer_called++;
}

void cras_fmt_conv_destroy(struct cras_fmt_conv *conv)
{
}

struct cras_fmt_conv *cras_channel_remix_conv_create(
    unsigned int num_channels, const float *coefficient)
{
  return NULL;
}

void cras_channel_remix_convert(struct cras_fmt_conv *conv,
    uint8_t *in_buf, size_t frames)
{
}

struct cras_observer_client *cras_observer_add(
      const struct cras_observer_ops *ops,
      void *context)
{
  observer_ops = (struct cras_observer_ops *)calloc(1, sizeof(*ops));
  memcpy(observer_ops, ops, sizeof(*ops));
  cras_observer_add_called++;
  return reinterpret_cast<struct cras_observer_client *>(0x55);
}

void cras_observer_remove(struct cras_observer_client *client)
{
  if (observer_ops)
    free(observer_ops);
  cras_observer_remove_called++;
}

void cras_observer_notify_nodes(void) {
  cras_observer_notify_nodes_called++;
}

void cras_observer_notify_active_node(enum CRAS_STREAM_DIRECTION direction,
				      cras_node_id_t node_id)
{
  cras_observer_notify_active_node_called++;
}

void cras_observer_notify_output_node_volume(cras_node_id_t node_id,
					     int32_t volume)
{
  cras_observer_notify_output_node_volume_called++;
}

void cras_observer_notify_node_left_right_swapped(cras_node_id_t node_id,
						  int swapped)
{
  cras_observer_notify_node_left_right_swapped_called++;
}

void cras_observer_notify_input_node_gain(cras_node_id_t node_id,
					  int32_t gain)
{
  cras_observer_notify_input_node_gain_called++;
}

int audio_thread_dev_start_ramp(struct audio_thread *thread,
                                struct cras_iodev *dev,
                                enum CRAS_IODEV_RAMP_REQUEST request)
{
  audio_thread_dev_start_ramp_called++;
  audio_thread_dev_start_ramp_dev = dev;
  audio_thread_dev_start_ramp_req = request;
  return 0;
}

#ifdef HAVE_WEBRTC_APM
struct cras_apm *cras_apm_list_add(struct cras_apm_list *list,
				   void *dev_ptr,
				   const struct cras_audio_format *fmt)
{
  return NULL;
}
void cras_apm_list_remove(struct cras_apm_list *list, void *dev_ptr)
{
}
int cras_apm_list_init(const char *device_config_dir)
{
  return 0;
}
#endif

//  From librt.
int clock_gettime(clockid_t clk_id, struct timespec *tp) {
  tp->tv_sec = clock_gettime_retspec.tv_sec;
  tp->tv_nsec = clock_gettime_retspec.tv_nsec;
  return 0;
}

}  // extern "C"