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2d598535aa
Currently FecController knows about network conditions, these information can be used to control RTX settings in-call. Change-Id: I8f84164aeac48ea13b7f1cf82fd7424431f98ada Bug: webrtc:15167 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/304800 Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Per Kjellander <perkj@webrtc.org> Commit-Queue: Ying Wang <yinwa@webrtc.org> Cr-Commit-Position: refs/heads/main@{#40192}
115 lines
4.1 KiB
C++
115 lines
4.1 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "api/fec_controller.h"
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#include <stdint.h>
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#include <vector>
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#include "modules/include/module_fec_types.h"
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#include "modules/video_coding/fec_controller_default.h"
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#include "system_wrappers/include/clock.h"
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#include "test/gtest.h"
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namespace webrtc {
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static const int kCodecBitrateBps = 100000;
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class ProtectionBitrateCalculatorTest : public ::testing::Test {
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protected:
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enum {
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kSampleRate = 90000 // RTP timestamps per second.
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};
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class ProtectionCallback : public VCMProtectionCallback {
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public:
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int ProtectionRequest(const FecProtectionParams* delta_params,
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const FecProtectionParams* key_params,
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uint32_t* sent_video_rate_bps,
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uint32_t* sent_nack_rate_bps,
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uint32_t* sent_fec_rate_bps) override {
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*sent_video_rate_bps = kCodecBitrateBps;
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*sent_nack_rate_bps = nack_rate_bps_;
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*sent_fec_rate_bps = fec_rate_bps_;
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return 0;
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}
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void SetRetransmissionMode(int retransmission_mode) {}
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uint32_t fec_rate_bps_ = 0;
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uint32_t nack_rate_bps_ = 0;
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};
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// Note: simulated clock starts at 1 seconds, since parts of webrtc use 0 as
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// a special case (e.g. frame rate in media optimization).
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ProtectionBitrateCalculatorTest()
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: clock_(1000), fec_controller_(&clock_, &protection_callback_) {}
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SimulatedClock clock_;
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ProtectionCallback protection_callback_;
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FecControllerDefault fec_controller_;
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};
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TEST_F(ProtectionBitrateCalculatorTest, ProtectsUsingFecBitrate) {
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static const uint32_t kMaxBitrateBps = 130000;
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fec_controller_.SetProtectionMethod(true /*enable_fec*/,
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false /* enable_nack */);
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fec_controller_.SetEncodingData(640, 480, 1, 1000);
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// Using 10% of codec bitrate for FEC.
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protection_callback_.fec_rate_bps_ = kCodecBitrateBps / 10;
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uint32_t target_bitrate = fec_controller_.UpdateFecRates(
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kMaxBitrateBps, 30, 0, std::vector<bool>(1, false), 0);
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EXPECT_GT(target_bitrate, 0u);
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EXPECT_GT(kMaxBitrateBps, target_bitrate);
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// Using as much for codec bitrate as fec rate, new target rate should share
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// both equally, but only be half of max (since that ceiling should be hit).
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protection_callback_.fec_rate_bps_ = kCodecBitrateBps;
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target_bitrate = fec_controller_.UpdateFecRates(
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kMaxBitrateBps, 30, 128, std::vector<bool>(1, false), 100);
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EXPECT_EQ(kMaxBitrateBps / 2, target_bitrate);
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}
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TEST_F(ProtectionBitrateCalculatorTest, ProtectsUsingNackBitrate) {
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static const uint32_t kMaxBitrateBps = 130000;
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fec_controller_.SetProtectionMethod(false /*enable_fec*/,
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true /* enable_nack */);
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fec_controller_.SetEncodingData(640, 480, 1, 1000);
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uint32_t target_bitrate = fec_controller_.UpdateFecRates(
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kMaxBitrateBps, 30, 0, std::vector<bool>(1, false), 0);
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EXPECT_EQ(kMaxBitrateBps, target_bitrate);
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// Using as much for codec bitrate as nack rate, new target rate should share
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// both equally, but only be half of max (since that ceiling should be hit).
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protection_callback_.nack_rate_bps_ = kMaxBitrateBps;
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target_bitrate = fec_controller_.UpdateFecRates(
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kMaxBitrateBps, 30, 128, std::vector<bool>(1, false), 100);
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EXPECT_EQ(kMaxBitrateBps / 2, target_bitrate);
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}
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TEST_F(ProtectionBitrateCalculatorTest, NoProtection) {
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static const uint32_t kMaxBitrateBps = 130000;
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fec_controller_.SetProtectionMethod(false /*enable_fec*/,
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false /* enable_nack */);
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fec_controller_.SetEncodingData(640, 480, 1, 1000);
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uint32_t target_bitrate = fec_controller_.UpdateFecRates(
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kMaxBitrateBps, 30, 128, std::vector<bool>(1, false), 100);
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EXPECT_EQ(kMaxBitrateBps, target_bitrate);
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}
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} // namespace webrtc
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