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/*
Copyright 2018 Google Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS-IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "graph/mixer_node.h"
#include <algorithm>
#include "third_party/googletest/googletest/include/gtest/gtest.h"
#include "base/audio_buffer.h"
#include "base/logging.h"
#include "graph/system_settings.h"
#include "node/sink_node.h"
#include "node/source_node.h"
namespace vraudio {
namespace {
// Helper class to detect destruction.
class DeletionDetector {
public:
explicit DeletionDetector(bool* node_deletion_flag)
: node_deletion_flag_(node_deletion_flag) {}
~DeletionDetector() {
if (node_deletion_flag_ != nullptr) {
*node_deletion_flag_ = true;
}
}
private:
bool* node_deletion_flag_;
};
// Wraps |SourceNode| to detect its deletion.
class MySourceNode : public SourceNode, DeletionDetector {
public:
explicit MySourceNode(bool* node_deletion_flag)
: SourceNode(), DeletionDetector(node_deletion_flag) {}
protected:
const AudioBuffer* AudioProcess() final { return nullptr; }
};
// Wraps |MixerNode| to detect its deletion.
class MyAudioMixerNode : public MixerNode, DeletionDetector {
public:
explicit MyAudioMixerNode(bool* node_deletion_flag,
const SystemSettings& system_settings)
: MixerNode(system_settings, kNumMonoChannels),
DeletionDetector(node_deletion_flag) {}
};
// Wraps |SinkNode| to detect its deletion.
class MySinkNode : public SinkNode, DeletionDetector {
public:
explicit MySinkNode(bool* node_deletion_flag)
: SinkNode(), DeletionDetector(node_deletion_flag) {}
};
// Tests that the |MixerNode| keeps connected at the moment all of its sources
// are removed.
TEST(AudioNodesTest, cleanUpOnEmptyInputTest) {
SystemSettings system_settings_(kNumMonoChannels, 128 /* frames_per_buffer */,
48000 /* sample_rate_hz */);
bool source_node_deleted = false;
bool mixer_node_deleted = false;
bool sink_node_deleted = false;
auto sink_node = std::make_shared<MySinkNode>(&sink_node_deleted);
{
// Create a source and mixer node and connect it to sink node.
auto source_node = std::make_shared<MySourceNode>(&source_node_deleted);
auto mixer_node = std::make_shared<MyAudioMixerNode>(&mixer_node_deleted,
system_settings_);
// Connect nodes.
sink_node->Connect(mixer_node);
mixer_node->Connect(source_node);
// End of stream is marked in source node. Do not expect any data anymore.
source_node->MarkEndOfStream();
}
EXPECT_FALSE(source_node_deleted);
EXPECT_FALSE(mixer_node_deleted);
EXPECT_FALSE(sink_node_deleted);
sink_node->CleanUp();
EXPECT_TRUE(source_node_deleted);
EXPECT_FALSE(mixer_node_deleted);
EXPECT_FALSE(sink_node_deleted);
}
} // namespace
} // namespace vraudio
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