You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
115 lines
4.1 KiB
115 lines
4.1 KiB
/*
|
|
* Copyright (c) 2016 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 "api/fec_controller.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <vector>
|
|
|
|
#include "modules/include/module_fec_types.h"
|
|
#include "modules/video_coding/fec_controller_default.h"
|
|
#include "system_wrappers/include/clock.h"
|
|
#include "test/gtest.h"
|
|
|
|
namespace webrtc {
|
|
|
|
static const int kCodecBitrateBps = 100000;
|
|
|
|
class ProtectionBitrateCalculatorTest : public ::testing::Test {
|
|
protected:
|
|
enum {
|
|
kSampleRate = 90000 // RTP timestamps per second.
|
|
};
|
|
|
|
class ProtectionCallback : public VCMProtectionCallback {
|
|
public:
|
|
int ProtectionRequest(const FecProtectionParams* delta_params,
|
|
const FecProtectionParams* key_params,
|
|
uint32_t* sent_video_rate_bps,
|
|
uint32_t* sent_nack_rate_bps,
|
|
uint32_t* sent_fec_rate_bps) override {
|
|
*sent_video_rate_bps = kCodecBitrateBps;
|
|
*sent_nack_rate_bps = nack_rate_bps_;
|
|
*sent_fec_rate_bps = fec_rate_bps_;
|
|
return 0;
|
|
}
|
|
|
|
uint32_t fec_rate_bps_ = 0;
|
|
uint32_t nack_rate_bps_ = 0;
|
|
};
|
|
|
|
// Note: simulated clock starts at 1 seconds, since parts of webrtc use 0 as
|
|
// a special case (e.g. frame rate in media optimization).
|
|
ProtectionBitrateCalculatorTest()
|
|
: clock_(1000), fec_controller_(&clock_, &protection_callback_) {}
|
|
|
|
SimulatedClock clock_;
|
|
ProtectionCallback protection_callback_;
|
|
FecControllerDefault fec_controller_;
|
|
};
|
|
|
|
TEST_F(ProtectionBitrateCalculatorTest, ProtectsUsingFecBitrate) {
|
|
static const uint32_t kMaxBitrateBps = 130000;
|
|
|
|
fec_controller_.SetProtectionMethod(true /*enable_fec*/,
|
|
false /* enable_nack */);
|
|
fec_controller_.SetEncodingData(640, 480, 1, 1000);
|
|
|
|
// Using 10% of codec bitrate for FEC.
|
|
protection_callback_.fec_rate_bps_ = kCodecBitrateBps / 10;
|
|
uint32_t target_bitrate = fec_controller_.UpdateFecRates(
|
|
kMaxBitrateBps, 30, 0, std::vector<bool>(1, false), 0);
|
|
|
|
EXPECT_GT(target_bitrate, 0u);
|
|
EXPECT_GT(kMaxBitrateBps, target_bitrate);
|
|
|
|
// Using as much for codec bitrate as fec rate, new target rate should share
|
|
// both equally, but only be half of max (since that ceiling should be hit).
|
|
protection_callback_.fec_rate_bps_ = kCodecBitrateBps;
|
|
target_bitrate = fec_controller_.UpdateFecRates(
|
|
kMaxBitrateBps, 30, 128, std::vector<bool>(1, false), 100);
|
|
EXPECT_EQ(kMaxBitrateBps / 2, target_bitrate);
|
|
}
|
|
|
|
TEST_F(ProtectionBitrateCalculatorTest, ProtectsUsingNackBitrate) {
|
|
static const uint32_t kMaxBitrateBps = 130000;
|
|
|
|
fec_controller_.SetProtectionMethod(false /*enable_fec*/,
|
|
true /* enable_nack */);
|
|
fec_controller_.SetEncodingData(640, 480, 1, 1000);
|
|
|
|
uint32_t target_bitrate = fec_controller_.UpdateFecRates(
|
|
kMaxBitrateBps, 30, 0, std::vector<bool>(1, false), 0);
|
|
|
|
EXPECT_EQ(kMaxBitrateBps, target_bitrate);
|
|
|
|
// Using as much for codec bitrate as nack rate, new target rate should share
|
|
// both equally, but only be half of max (since that ceiling should be hit).
|
|
protection_callback_.nack_rate_bps_ = kMaxBitrateBps;
|
|
target_bitrate = fec_controller_.UpdateFecRates(
|
|
kMaxBitrateBps, 30, 128, std::vector<bool>(1, false), 100);
|
|
EXPECT_EQ(kMaxBitrateBps / 2, target_bitrate);
|
|
}
|
|
|
|
TEST_F(ProtectionBitrateCalculatorTest, NoProtection) {
|
|
static const uint32_t kMaxBitrateBps = 130000;
|
|
|
|
fec_controller_.SetProtectionMethod(false /*enable_fec*/,
|
|
false /* enable_nack */);
|
|
fec_controller_.SetEncodingData(640, 480, 1, 1000);
|
|
|
|
uint32_t target_bitrate = fec_controller_.UpdateFecRates(
|
|
kMaxBitrateBps, 30, 128, std::vector<bool>(1, false), 100);
|
|
EXPECT_EQ(kMaxBitrateBps, target_bitrate);
|
|
}
|
|
|
|
} // namespace webrtc
|