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/*
* Copyright (c) 2020 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 "modules/audio_coding/audio_network_adaptor/frame_length_controller_v2.h"
#include <algorithm>
#include <memory>
#include "modules/audio_coding/audio_network_adaptor/controller.h"
#include "modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor_config.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
constexpr int kANASupportedFrameLengths[] = {20, 40, 60, 120};
constexpr int kMinPayloadBitrateBps = 16000;
} // namespace
class FrameLengthControllerV2Test : public testing::Test {
protected:
AudioEncoderRuntimeConfig GetDecision() {
AudioEncoderRuntimeConfig config;
controller_->MakeDecision(&config);
return config;
}
void SetOverhead(int overhead_bytes_per_packet) {
overhead_bytes_per_packet_ = overhead_bytes_per_packet;
Controller::NetworkMetrics metrics;
metrics.overhead_bytes_per_packet = overhead_bytes_per_packet;
controller_->UpdateNetworkMetrics(metrics);
}
void SetTargetBitrate(int target_audio_bitrate_bps) {
target_audio_bitrate_bps_ = target_audio_bitrate_bps;
Controller::NetworkMetrics metrics;
metrics.target_audio_bitrate_bps = target_audio_bitrate_bps;
controller_->UpdateNetworkMetrics(metrics);
}
void SetUplinkBandwidth(int uplink_bandwidth_bps) {
Controller::NetworkMetrics metrics;
metrics.uplink_bandwidth_bps = uplink_bandwidth_bps;
controller_->UpdateNetworkMetrics(metrics);
}
void ExpectFrameLengthDecision(int expected_frame_length_ms) {
auto config = GetDecision();
EXPECT_EQ(*config.frame_length_ms, expected_frame_length_ms);
}
std::unique_ptr<FrameLengthControllerV2> controller_ =
std::make_unique<FrameLengthControllerV2>(kANASupportedFrameLengths,
kMinPayloadBitrateBps,
/*use_slow_adaptation=*/false);
absl::optional<int> target_audio_bitrate_bps_;
absl::optional<int> overhead_bytes_per_packet_;
};
// Don't return any decision if we haven't received all required network
// metrics.
TEST_F(FrameLengthControllerV2Test, RequireNetworkMetrics) {
auto config = GetDecision();
EXPECT_FALSE(config.bitrate_bps);
EXPECT_FALSE(config.frame_length_ms);
SetOverhead(30);
config = GetDecision();
EXPECT_FALSE(config.frame_length_ms);
SetTargetBitrate(32000);
config = GetDecision();
EXPECT_FALSE(config.frame_length_ms);
SetUplinkBandwidth(32000);
config = GetDecision();
EXPECT_TRUE(config.frame_length_ms);
}
TEST_F(FrameLengthControllerV2Test, UseFastAdaptation) {
SetOverhead(50);
SetTargetBitrate(50000);
SetUplinkBandwidth(50000);
ExpectFrameLengthDecision(20);
SetTargetBitrate(20000);
ExpectFrameLengthDecision(120);
SetTargetBitrate(30000);
ExpectFrameLengthDecision(40);
SetTargetBitrate(25000);
ExpectFrameLengthDecision(60);
}
TEST_F(FrameLengthControllerV2Test, UseSlowAdaptation) {
controller_ = std::make_unique<FrameLengthControllerV2>(
kANASupportedFrameLengths, kMinPayloadBitrateBps,
/*use_slow_adaptation=*/true);
SetOverhead(50);
SetTargetBitrate(50000);
SetUplinkBandwidth(20000);
ExpectFrameLengthDecision(120);
SetUplinkBandwidth(30000);
ExpectFrameLengthDecision(40);
SetUplinkBandwidth(40000);
ExpectFrameLengthDecision(20);
}
} // namespace webrtc
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