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/*
* Copyright (c) 2012 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/test/TestRedFec.h"
#include <cstddef>
#include <cstdint>
#include <map>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include "absl/strings/match.h"
#include "api/audio/audio_frame.h"
#include "api/audio_codecs/L16/audio_decoder_L16.h"
#include "api/audio_codecs/L16/audio_encoder_L16.h"
#include "api/audio_codecs/audio_decoder_factory_template.h"
#include "api/audio_codecs/audio_encoder.h"
#include "api/audio_codecs/audio_encoder_factory_template.h"
#include "api/audio_codecs/audio_format.h"
#include "api/audio_codecs/g711/audio_decoder_g711.h"
#include "api/audio_codecs/g711/audio_encoder_g711.h"
#include "api/audio_codecs/g722/audio_decoder_g722.h"
#include "api/audio_codecs/g722/audio_encoder_g722.h"
#include "api/audio_codecs/opus/audio_decoder_opus.h"
#include "api/audio_codecs/opus/audio_encoder_opus.h"
#include "api/environment/environment_factory.h"
#include "api/neteq/default_neteq_factory.h"
#include "api/neteq/neteq.h"
#include "common_audio/vad/include/vad.h"
#include "modules/audio_coding/codecs/cng/audio_encoder_cng.h"
#include "modules/audio_coding/codecs/red/audio_encoder_copy_red.h"
#include "modules/audio_coding/include/audio_coding_module.h"
#include "modules/audio_coding/test/Channel.h"
#include "rtc_base/strings/string_builder.h"
#include "test/gtest.h"
#include "test/testsupport/file_utils.h"
namespace webrtc {
TestRedFec::TestRedFec()
: env_(CreateEnvironment(&field_trials_)),
encoder_factory_(CreateAudioEncoderFactory<AudioEncoderG711,
AudioEncoderG722,
AudioEncoderL16,
AudioEncoderOpus>()),
decoder_factory_(CreateAudioDecoderFactory<AudioDecoderG711,
AudioDecoderG722,
AudioDecoderL16,
AudioDecoderOpus>()),
_acmA(AudioCodingModule::Create()),
_neteq(DefaultNetEqFactory().Create(env_,
NetEq::Config(),
decoder_factory_)),
_channelA2B(nullptr),
_testCntr(0) {}
TestRedFec::~TestRedFec() {
if (_channelA2B != nullptr) {
delete _channelA2B;
_channelA2B = nullptr;
}
}
void TestRedFec::Perform() {
const std::string file_name =
test::ResourcePath("audio_coding/testfile32kHz", "pcm");
_inFileA.Open(file_name, 32000, "rb");
// Create and connect the channel
_channelA2B = new Channel;
_acmA->RegisterTransportCallback(_channelA2B);
_channelA2B->RegisterReceiverNetEq(_neteq.get());
RegisterSendCodec(_acmA, {"L16", 8000, 1}, Vad::kVadAggressive, true);
OpenOutFile(_testCntr);
Run();
_outFileB.Close();
// Switch to another 8 kHz codec; RED should remain switched on.
RegisterSendCodec(_acmA, {"PCMU", 8000, 1}, Vad::kVadAggressive, true);
OpenOutFile(_testCntr);
Run();
_outFileB.Close();
// TODO(bugs.webrtc.org/345525069): Either fix/enable or remove G722.
#if defined(__has_feature) && !__has_feature(undefined_behavior_sanitizer)
// Switch to a 16 kHz codec; RED should be switched off.
RegisterSendCodec(_acmA, {"G722", 8000, 1}, Vad::kVadAggressive, false);
OpenOutFile(_testCntr);
RegisterSendCodec(_acmA, {"G722", 8000, 1}, Vad::kVadAggressive, false);
Run();
RegisterSendCodec(_acmA, {"G722", 8000, 1}, Vad::kVadAggressive, false);
Run();
_outFileB.Close();
_channelA2B->SetFECTestWithPacketLoss(true);
// Following tests are under packet losses.
// Switch to a 16 kHz codec; RED should be switched off.
RegisterSendCodec(_acmA, {"G722", 8000, 1}, Vad::kVadAggressive, false);
OpenOutFile(_testCntr);
Run();
_outFileB.Close();
#endif
RegisterSendCodec(_acmA, {"opus", 48000, 2}, std::nullopt, false);
// _channelA2B imposes 25% packet loss rate.
EXPECT_EQ(0, _acmA->SetPacketLossRate(25));
_acmA->ModifyEncoder([&](std::unique_ptr<AudioEncoder>* enc) {
EXPECT_EQ(true, (*enc)->SetFec(true));
});
OpenOutFile(_testCntr);
Run();
// Switch to L16 with RED.
RegisterSendCodec(_acmA, {"L16", 8000, 1}, std::nullopt, true);
Run();
// Switch to Opus again.
RegisterSendCodec(_acmA, {"opus", 48000, 2}, std::nullopt, false);
_acmA->ModifyEncoder([&](std::unique_ptr<AudioEncoder>* enc) {
EXPECT_EQ(true, (*enc)->SetFec(false));
});
Run();
_acmA->ModifyEncoder([&](std::unique_ptr<AudioEncoder>* enc) {
EXPECT_EQ(true, (*enc)->SetFec(true));
});
_outFileB.Close();
}
void TestRedFec::RegisterSendCodec(
const std::unique_ptr<AudioCodingModule>& acm,
const SdpAudioFormat& codec_format,
std::optional<Vad::Aggressiveness> vad_mode,
bool use_red) {
constexpr int payload_type = 17, cn_payload_type = 27, red_payload_type = 37;
auto encoder = encoder_factory_->Create(env_, codec_format,
{.payload_type = payload_type});
EXPECT_NE(encoder, nullptr);
std::map<int, SdpAudioFormat> receive_codecs = {{payload_type, codec_format}};
if (!absl::EqualsIgnoreCase(codec_format.name, "opus")) {
if (vad_mode.has_value()) {
AudioEncoderCngConfig config;
config.speech_encoder = std::move(encoder);
config.num_channels = 1;
config.payload_type = cn_payload_type;
config.vad_mode = vad_mode.value();
encoder = CreateComfortNoiseEncoder(std::move(config));
receive_codecs.emplace(std::make_pair(
cn_payload_type, SdpAudioFormat("CN", codec_format.clockrate_hz, 1)));
}
if (use_red) {
AudioEncoderCopyRed::Config config;
config.payload_type = red_payload_type;
config.speech_encoder = std::move(encoder);
encoder = std::make_unique<AudioEncoderCopyRed>(std::move(config),
field_trials_);
receive_codecs.emplace(
std::make_pair(red_payload_type,
SdpAudioFormat("red", codec_format.clockrate_hz, 1)));
}
}
acm->SetEncoder(std::move(encoder));
_neteq->SetCodecs(receive_codecs);
}
void TestRedFec::Run() {
AudioFrame audioFrame;
int32_t outFreqHzB = _outFileB.SamplingFrequency();
// Set test length to 500 ms (50 blocks of 10 ms each).
_inFileA.SetNum10MsBlocksToRead(50);
// Fast-forward 1 second (100 blocks) since the file starts with silence.
_inFileA.FastForward(100);
while (!_inFileA.EndOfFile()) {
EXPECT_GT(_inFileA.Read10MsData(audioFrame), 0);
EXPECT_GE(_acmA->Add10MsData(audioFrame), 0);
bool muted;
EXPECT_EQ(NetEq::kOK, _neteq->GetAudio(&audioFrame, &muted));
EXPECT_TRUE(_resampler_helper.MaybeResample(outFreqHzB, &audioFrame));
ASSERT_FALSE(muted);
_outFileB.Write10MsData(audioFrame.data(), audioFrame.samples_per_channel_);
}
_inFileA.Rewind();
}
void TestRedFec::OpenOutFile(int16_t test_number) {
std::string file_name;
StringBuilder file_stream;
file_stream << test::OutputPath();
file_stream << "TestRedFec_outFile_";
file_stream << test_number << ".pcm";
file_name = file_stream.str();
_outFileB.Open(file_name, 16000, "wb");
}
} // namespace webrtc
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