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/*
* Copyright (c) 2014 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.
*/
#ifndef MODULES_AUDIO_CODING_NETEQ_TOOLS_NETEQ_QUALITY_TEST_H_
#define MODULES_AUDIO_CODING_NETEQ_TOOLS_NETEQ_QUALITY_TEST_H_
#include <cstddef>
#include <cstdint>
#include <fstream>
#include <memory>
#include <set>
#include "api/audio_codecs/audio_decoder_factory.h"
#include "api/audio_codecs/audio_format.h"
#include "api/audio_codecs/builtin_audio_decoder_factory.h"
#include "api/neteq/neteq.h"
#include "api/rtp_headers.h"
#include "api/scoped_refptr.h"
#include "modules/audio_coding/neteq/tools/audio_sink.h"
#include "modules/audio_coding/neteq/tools/input_audio_file.h"
#include "modules/audio_coding/neteq/tools/rtp_generator.h"
#include "rtc_base/buffer.h"
#include "test/gtest.h"
namespace webrtc {
namespace test {
enum LossModes {
kNoLoss,
kUniformLoss,
kGilbertElliotLoss,
kFixedLoss,
kLastLossMode
};
class LossModel {
public:
virtual ~LossModel() {}
virtual bool Lost(int now_ms) = 0;
};
class NoLoss : public LossModel {
public:
bool Lost(int now_ms) override;
};
class UniformLoss : public LossModel {
public:
UniformLoss(double loss_rate);
bool Lost(int now_ms) override;
void set_loss_rate(double loss_rate) { loss_rate_ = loss_rate; }
private:
double loss_rate_;
};
class GilbertElliotLoss : public LossModel {
public:
GilbertElliotLoss(double prob_trans_11, double prob_trans_01);
~GilbertElliotLoss() override;
bool Lost(int now_ms) override;
private:
// Prob. of losing current packet, when previous packet is lost.
double prob_trans_11_;
// Prob. of losing current packet, when previous packet is not lost.
double prob_trans_01_;
bool lost_last_;
std::unique_ptr<UniformLoss> uniform_loss_model_;
};
struct FixedLossEvent {
int start_ms;
int duration_ms;
FixedLossEvent(int start_ms, int duration_ms)
: start_ms(start_ms), duration_ms(duration_ms) {}
};
struct FixedLossEventCmp {
bool operator()(const FixedLossEvent& l_event,
const FixedLossEvent& r_event) const {
return l_event.start_ms < r_event.start_ms;
}
};
class FixedLossModel : public LossModel {
public:
FixedLossModel(std::set<FixedLossEvent, FixedLossEventCmp> loss_events);
~FixedLossModel() override;
bool Lost(int now_ms) override;
private:
std::set<FixedLossEvent, FixedLossEventCmp> loss_events_;
std::set<FixedLossEvent, FixedLossEventCmp>::iterator loss_events_it_;
};
class NetEqQualityTest : public ::testing::Test {
protected:
NetEqQualityTest(int block_duration_ms,
int in_sampling_khz,
int out_sampling_khz,
const SdpAudioFormat& format,
const scoped_refptr<AudioDecoderFactory>& decoder_factory =
webrtc::CreateBuiltinAudioDecoderFactory());
~NetEqQualityTest() override;
void SetUp() override;
// EncodeBlock(...) does the following:
// 1. encodes a block of audio, saved in `in_data` and has a length of
// `block_size_samples` (samples per channel),
// 2. save the bit stream to `payload` of `max_bytes` bytes in size,
// 3. returns the length of the payload (in bytes),
virtual int EncodeBlock(int16_t* in_data,
size_t block_size_samples,
Buffer* payload,
size_t max_bytes) = 0;
// PacketLost(...) determines weather a packet sent at an indicated time gets
// lost or not.
bool PacketLost();
// DecodeBlock() decodes a block of audio using the payload stored in
// `payload_` with the length of `payload_size_bytes_` (bytes). The decoded
// audio is to be stored in `out_data_`.
int DecodeBlock();
// Transmit() uses `rtp_generator_` to generate a packet and passes it to
// `neteq_`.
int Transmit();
// Runs encoding / transmitting / decoding.
void Simulate();
// Write to log file. Usage Log() << ...
std::ofstream& Log();
SdpAudioFormat audio_format_;
const size_t channels_;
private:
int decoded_time_ms_;
int decodable_time_ms_;
double drift_factor_;
int packet_loss_rate_;
const int block_duration_ms_;
const int in_sampling_khz_;
const int out_sampling_khz_;
// Number of samples per channel in a frame.
const size_t in_size_samples_;
size_t payload_size_bytes_;
size_t max_payload_bytes_;
std::unique_ptr<InputAudioFile> in_file_;
std::unique_ptr<AudioSink> output_;
std::ofstream log_file_;
std::unique_ptr<RtpGenerator> rtp_generator_;
std::unique_ptr<NetEq> neteq_;
std::unique_ptr<LossModel> loss_model_;
std::unique_ptr<int16_t[]> in_data_;
Buffer payload_;
AudioFrame out_frame_;
RTPHeader rtp_header_;
size_t total_payload_size_bytes_;
};
} // namespace test
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_NETEQ_TOOLS_NETEQ_QUALITY_TEST_H_
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