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/*
* Copyright 2004 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <utility>
#include "pc/currentspeakermonitor.h"
#include "pc/audiomonitor.h"
#include "rtc_base/gunit.h"
#include "rtc_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);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
// No speaker recognized because the initial sample is treated as possibly
// just noise and disregarded.
EXPECT_EQ(current_speaker_, 0U);
EXPECT_EQ(num_changes_, 0);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, kSsrc2);
EXPECT_EQ(num_changes_, 1);
}
// See: https://code.google.com/p/webrtc/issues/detail?id=2409
TEST_F(CurrentSpeakerMonitorTest, DISABLED_RapidSpeakerChange) {
AudioInfo info;
InitAudioInfo(&info, 0, 0);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, 0U);
EXPECT_EQ(num_changes_, 0);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, kSsrc2);
EXPECT_EQ(num_changes_, 1);
info.active_streams.push_back(std::make_pair(kSsrc1, 9));
info.active_streams.push_back(std::make_pair(kSsrc2, 1));
SignalAudioMonitor(info);
// We expect no speaker change because of the rapid change.
EXPECT_EQ(current_speaker_, kSsrc2);
EXPECT_EQ(num_changes_, 1);
}
// Flaky on iOS: webrtc:7057.
#if defined(WEBRTC_IOS)
#define MAYBE_SpeakerChange DISABLED_SpeakerChange
#else
#define MAYBE_SpeakerChange SpeakerChange
#endif
TEST_F(CurrentSpeakerMonitorTest, MAYBE_SpeakerChange) {
AudioInfo info;
InitAudioInfo(&info, 0, 0);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, 0U);
EXPECT_EQ(num_changes_, 0);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, kSsrc2);
EXPECT_EQ(num_changes_, 1);
// Wait so the changes don't come so rapidly.
rtc::Thread::SleepMs(kSleepTimeBetweenSwitches);
info.active_streams.push_back(std::make_pair(kSsrc1, 9));
info.active_streams.push_back(std::make_pair(kSsrc2, 1));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, kSsrc1);
EXPECT_EQ(num_changes_, 2);
}
TEST_F(CurrentSpeakerMonitorTest, InterwordSilence) {
AudioInfo info;
InitAudioInfo(&info, 0, 0);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, 0U);
EXPECT_EQ(num_changes_, 0);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, kSsrc2);
EXPECT_EQ(num_changes_, 1);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 7));
SignalAudioMonitor(info);
EXPECT_EQ(current_speaker_, kSsrc2);
EXPECT_EQ(num_changes_, 1);
// Wait so the changes don't come so rapidly.
rtc::Thread::SleepMs(kSleepTimeBetweenSwitches);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 0));
SignalAudioMonitor(info);
// Current speaker shouldn't have changed because we treat this as an inter-
// word silence.
EXPECT_EQ(current_speaker_, kSsrc2);
EXPECT_EQ(num_changes_, 1);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 0));
SignalAudioMonitor(info);
// Current speaker shouldn't have changed because we treat this as an inter-
// word silence.
EXPECT_EQ(current_speaker_, kSsrc2);
EXPECT_EQ(num_changes_, 1);
info.active_streams.push_back(std::make_pair(kSsrc1, 3));
info.active_streams.push_back(std::make_pair(kSsrc2, 0));
SignalAudioMonitor(info);
// At this point, we should have concluded that SSRC2 stopped speaking.
EXPECT_EQ(current_speaker_, kSsrc1);
EXPECT_EQ(num_changes_, 2);
}
} // namespace cricket
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