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/*
* Copyright 2019 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 "pc/video_rtp_receiver.h"
#include <cstdint>
#include <functional>
#include <memory>
#include <string>
#include <vector>
#include "api/make_ref_counted.h"
#include "api/media_stream_interface.h"
#include "api/scoped_refptr.h"
#include "api/task_queue/task_queue_base.h"
#include "api/video/recordable_encoded_frame.h"
#include "api/video/test/mock_recordable_encoded_frame.h"
#include "api/video/video_sink_interface.h"
#include "media/base/fake_media_engine.h"
#include "media/base/media_channel.h"
#include "rtc_base/task_queue_for_test.h"
#include "rtc_base/thread.h"
#include "test/gmock.h"
#include "test/gtest.h"
using ::testing::_;
using ::testing::AnyNumber;
using ::testing::InSequence;
using ::testing::Mock;
using ::testing::NiceMock;
using ::testing::SaveArg;
using ::testing::StrictMock;
namespace webrtc {
namespace {
class VideoRtpReceiverTest : public testing::Test {
protected:
class MockVideoMediaSendChannel : public FakeVideoMediaSendChannel {
public:
MockVideoMediaSendChannel(const VideoOptions& options,
TaskQueueBase* network_thread = Thread::Current())
: FakeVideoMediaSendChannel(options, network_thread) {}
MOCK_METHOD(void,
GenerateSendKeyFrame,
(uint32_t, const std::vector<std::string>&),
(override));
};
class MockVideoMediaReceiveChannel : public FakeVideoMediaReceiveChannel {
public:
MockVideoMediaReceiveChannel(
const VideoOptions& options,
TaskQueueBase* network_thread = Thread::Current())
: FakeVideoMediaReceiveChannel(options, network_thread) {}
MOCK_METHOD(void,
SetRecordableEncodedFrameCallback,
(uint32_t, std::function<void(const RecordableEncodedFrame&)>),
(override));
MOCK_METHOD(void,
ClearRecordableEncodedFrameCallback,
(uint32_t),
(override));
MOCK_METHOD(void, RequestRecvKeyFrame, (uint32_t), (override));
};
class MockVideoSink : public VideoSinkInterface<RecordableEncodedFrame> {
public:
MOCK_METHOD(void, OnFrame, (const RecordableEncodedFrame&), (override));
};
VideoRtpReceiverTest()
: worker_thread_(Thread::Create()),
channel_(VideoOptions()),
receiver_(make_ref_counted<VideoRtpReceiver>(
worker_thread_.get(),
std::string("receiver"),
std::vector<std::string>({"stream"}))) {
worker_thread_->Start();
SetMediaChannel(&channel_);
}
~VideoRtpReceiverTest() override {
// Clear expectations that tests may have set up before calling
// SetMediaChannel(nullptr).
Mock::VerifyAndClearExpectations(&channel_);
receiver_->Stop();
SetMediaChannel(nullptr);
}
void SetMediaChannel(MediaReceiveChannelInterface* media_channel) {
SendTask(worker_thread_.get(),
[&]() { receiver_->SetMediaChannel(media_channel); });
}
VideoTrackSourceInterface* Source() {
return receiver_->streams()[0]->FindVideoTrack("receiver")->GetSource();
}
AutoThread main_thread_;
std::unique_ptr<Thread> worker_thread_;
NiceMock<MockVideoMediaReceiveChannel> channel_;
scoped_refptr<VideoRtpReceiver> receiver_;
};
TEST_F(VideoRtpReceiverTest, SupportsEncodedOutput) {
EXPECT_TRUE(Source()->SupportsEncodedOutput());
}
TEST_F(VideoRtpReceiverTest, GeneratesKeyFrame) {
EXPECT_CALL(channel_, RequestRecvKeyFrame(0));
Source()->GenerateKeyFrame();
}
TEST_F(VideoRtpReceiverTest,
GenerateKeyFrameOnChannelSwitchUnlessGenerateKeyframeCalled) {
// A channel switch without previous call to GenerateKeyFrame shouldn't
// cause a call to happen on the new channel.
MockVideoMediaReceiveChannel channel2{VideoOptions()};
EXPECT_CALL(channel_, RequestRecvKeyFrame).Times(0);
EXPECT_CALL(channel2, RequestRecvKeyFrame).Times(0);
SetMediaChannel(&channel2);
Mock::VerifyAndClearExpectations(&channel2);
// Generate a key frame. When we switch channel next time, we will have to
// re-generate it as we don't know if it was eventually received
EXPECT_CALL(channel2, RequestRecvKeyFrame).Times(1);
Source()->GenerateKeyFrame();
MockVideoMediaReceiveChannel channel3{VideoOptions()};
EXPECT_CALL(channel3, RequestRecvKeyFrame);
SetMediaChannel(&channel3);
// Switching to a new channel should now not cause calls to GenerateKeyFrame.
StrictMock<MockVideoMediaReceiveChannel> channel4{VideoOptions()};
SetMediaChannel(&channel4);
// We must call SetMediaChannel(nullptr) here since the mock media channels
// live on the stack and `receiver_` still has a pointer to those objects.
SetMediaChannel(nullptr);
}
TEST_F(VideoRtpReceiverTest, EnablesEncodedOutput) {
EXPECT_CALL(channel_, SetRecordableEncodedFrameCallback(/*ssrc=*/0, _));
EXPECT_CALL(channel_, ClearRecordableEncodedFrameCallback).Times(0);
MockVideoSink sink;
Source()->AddEncodedSink(&sink);
}
TEST_F(VideoRtpReceiverTest, DisablesEncodedOutput) {
EXPECT_CALL(channel_, ClearRecordableEncodedFrameCallback(/*ssrc=*/0));
MockVideoSink sink;
Source()->AddEncodedSink(&sink);
Source()->RemoveEncodedSink(&sink);
}
TEST_F(VideoRtpReceiverTest, DisablesEnablesEncodedOutputOnChannelSwitch) {
InSequence s;
EXPECT_CALL(channel_, SetRecordableEncodedFrameCallback);
EXPECT_CALL(channel_, ClearRecordableEncodedFrameCallback);
MockVideoSink sink;
Source()->AddEncodedSink(&sink);
MockVideoMediaReceiveChannel channel2{VideoOptions()};
EXPECT_CALL(channel2, SetRecordableEncodedFrameCallback);
SetMediaChannel(&channel2);
Mock::VerifyAndClearExpectations(&channel2);
// When clearing encoded frame buffer function, we need channel switches
// to NOT set the callback again.
EXPECT_CALL(channel2, ClearRecordableEncodedFrameCallback);
Source()->RemoveEncodedSink(&sink);
StrictMock<MockVideoMediaReceiveChannel> channel3{VideoOptions()};
SetMediaChannel(&channel3);
// We must call SetMediaChannel(nullptr) here since the mock media channels
// live on the stack and `receiver_` still has a pointer to those objects.
SetMediaChannel(nullptr);
}
TEST_F(VideoRtpReceiverTest, BroadcastsEncodedFramesWhenEnabled) {
std::function<void(const RecordableEncodedFrame&)> broadcast;
EXPECT_CALL(channel_, SetRecordableEncodedFrameCallback(_, _))
.WillRepeatedly(SaveArg<1>(&broadcast));
MockVideoSink sink;
Source()->AddEncodedSink(&sink);
// Make sure SetEncodedFrameBufferFunction completes.
Mock::VerifyAndClearExpectations(&channel_);
// Pass two frames on different contexts.
EXPECT_CALL(sink, OnFrame).Times(2);
MockRecordableEncodedFrame frame;
broadcast(frame);
SendTask(worker_thread_.get(), [&] { broadcast(frame); });
}
TEST_F(VideoRtpReceiverTest, EnablesEncodedOutputOnChannelRestart) {
InSequence s;
MockVideoSink sink;
Source()->AddEncodedSink(&sink);
EXPECT_CALL(channel_, SetRecordableEncodedFrameCallback(4711, _));
receiver_->SetupMediaChannel(4711);
EXPECT_CALL(channel_, ClearRecordableEncodedFrameCallback(4711));
EXPECT_CALL(channel_, SetRecordableEncodedFrameCallback(0, _));
receiver_->SetupUnsignaledMediaChannel();
}
} // namespace
} // namespace webrtc
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