currentspeakermonitor_unittest.cc - Android社区

/*
 * libjingle
 * Copyright 2004 Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 */

#include "talk/session/media/audiomonitor.h"
#include "talk/session/media/currentspeakermonitor.h"
#include "webrtc/base/gunit.h"
#include "webrtc/base/thread.h"

namespace cricket {

static const uint32_t kSsrc1 = 1001;
static const uint32_t kSsrc2 = 1002;
static const uint32_t kMinTimeBetweenSwitches = 10;
// Due to limited system clock resolution, the CurrentSpeakerMonitor may
// actually require more or less time between switches than that specified
// in the call to set_min_time_between_switches.  To be safe, we sleep for
// 90 ms more than the min time between switches before checking for a switch.
// I am assuming system clocks do not have a coarser resolution than 90 ms.
static const uint32_t kSleepTimeBetweenSwitches = 100;

class CurrentSpeakerMonitorTest : public testing::Test,
    public sigslot::has_slots<> {
 public:
  CurrentSpeakerMonitorTest() {
    monitor_ = new CurrentSpeakerMonitor(&source_);
    // Shrink the minimum time betweeen switches to 10 ms so we don't have to
    // slow down our tests.
    monitor_->set_min_time_between_switches(kMinTimeBetweenSwitches);
    monitor_->SignalUpdate.connect(this, &CurrentSpeakerMonitorTest::OnUpdate);
    current_speaker_ = 0;
    num_changes_ = 0;
    monitor_->Start();
  }

~CurrentSpeakerMonitorTest() {
    delete monitor_;
  }

void SignalAudioMonitor(const AudioInfo& info) {
    source_.SignalAudioMonitor(&source_, info);
  }

protected:
  AudioSourceContext source_;
  CurrentSpeakerMonitor* monitor_;
  int num_changes_;
  uint32_t current_speaker_;

void OnUpdate(CurrentSpeakerMonitor* monitor, uint32_t current_speaker) {
    current_speaker_ = current_speaker;
    num_changes_++;
  }
};

static void InitAudioInfo(AudioInfo* info, int input_level, int output_level) {
  info->input_level = input_level;
  info->output_level = output_level;
}

TEST_F(CurrentSpeakerMonitorTest, NoActiveStreams) {
  AudioInfo info;
  InitAudioInfo(&info, 0, 0);
  SignalAudioMonitor(info);

EXPECT_EQ(current_speaker_, 0U);
  EXPECT_EQ(num_changes_, 0);
}

TEST_F(CurrentSpeakerMonitorTest, MultipleActiveStreams) {
  AudioInfo info;
  InitAudioInfo(&info, 0, 0);