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/*
* 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:
*
* 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,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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 kSsrc1 = 1001;
static const uint32 kSsrc2 = 1002;
static const uint32 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 kSleepTimeBetweenSwitches = 100;
class CurrentSpeakerMonitorTest : public testing::Test,
public sigslot::has_slots<> {
public:
CurrentSpeakerMonitorTest() {
monitor_ = new CurrentSpeakerMonitor(&source_, NULL);
// 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 current_speaker_;
void OnUpdate(CurrentSpeakerMonitor* monitor, uint32 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);
}
TEST_F(CurrentSpeakerMonitorTest, 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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