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/*
* Copyright 2017 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 "rtc_base/bitrateallocationstrategy.h"
#include "rtc_base/gunit.h"
namespace rtc {
std::vector<const rtc::BitrateAllocationStrategy::TrackConfig*>
MakeTrackConfigPtrsVector(
const std::vector<BitrateAllocationStrategy::TrackConfig>& track_configs) {
std::vector<const rtc::BitrateAllocationStrategy::TrackConfig*>
track_config_ptrs(track_configs.size());
int i = 0;
for (const auto& c : track_configs) {
track_config_ptrs[i++] = &c;
}
return track_config_ptrs;
}
TEST(BitrateAllocationStrategyTest, SetAllBitratesToMinimum) {
const std::string audio_track_id = "audio_track";
constexpr uint32_t min_audio_bitrate = 6000;
constexpr uint32_t max_audio_bitrate = 64000;
const std::string video_track_id = "video_track";
constexpr uint32_t min_video_bitrate = 30000;
constexpr uint32_t max_video_bitrate = 300000;
constexpr uint32_t min_other_bitrate = 3000;
constexpr uint32_t max_other_bitrate = 30000;
std::vector<BitrateAllocationStrategy::TrackConfig> track_configs = {
BitrateAllocationStrategy::TrackConfig(
min_audio_bitrate, max_audio_bitrate, false, audio_track_id),
BitrateAllocationStrategy::TrackConfig(
min_video_bitrate, max_video_bitrate, false, video_track_id),
BitrateAllocationStrategy::TrackConfig(min_other_bitrate,
max_other_bitrate, false, "")};
std::vector<const rtc::BitrateAllocationStrategy::TrackConfig*>
track_config_ptrs = MakeTrackConfigPtrsVector(track_configs);
std::vector<uint32_t> allocations =
BitrateAllocationStrategy::SetAllBitratesToMinimum(track_config_ptrs);
EXPECT_EQ(min_audio_bitrate, allocations[0]);
EXPECT_EQ(min_video_bitrate, allocations[1]);
EXPECT_EQ(min_other_bitrate, allocations[2]);
}
TEST(BitrateAllocationStrategyTest, DistributeBitratesEvenly) {
const std::string audio_track_id = "audio_track";
constexpr uint32_t min_audio_bitrate = 16000;
constexpr uint32_t max_audio_bitrate = 64000;
const std::string video_track_id = "video_track";
constexpr uint32_t min_video_bitrate = 30000;
constexpr uint32_t max_video_bitrate = 300000;
constexpr uint32_t min_other_bitrate = 3000;
constexpr uint32_t max_other_bitrate = 30000;
constexpr uint32_t available_bitrate = 52000;
constexpr uint32_t even_bitrate_increase =
(available_bitrate - min_audio_bitrate - min_video_bitrate -
min_other_bitrate) /
3;
std::vector<BitrateAllocationStrategy::TrackConfig> track_configs = {
BitrateAllocationStrategy::TrackConfig(
min_audio_bitrate, max_audio_bitrate, false, audio_track_id),
BitrateAllocationStrategy::TrackConfig(
min_video_bitrate, max_video_bitrate, false, video_track_id),
BitrateAllocationStrategy::TrackConfig(min_other_bitrate,
max_other_bitrate, false, "")};
std::vector<const rtc::BitrateAllocationStrategy::TrackConfig*>
track_config_ptrs = MakeTrackConfigPtrsVector(track_configs);
std::vector<uint32_t> allocations =
BitrateAllocationStrategy::DistributeBitratesEvenly(track_config_ptrs,
available_bitrate);
EXPECT_EQ(min_audio_bitrate + even_bitrate_increase, allocations[0]);
EXPECT_EQ(min_video_bitrate + even_bitrate_increase, allocations[1]);
EXPECT_EQ(min_other_bitrate + even_bitrate_increase, allocations[2]);
}
std::vector<uint32_t> RunAudioPriorityAllocation(
uint32_t sufficient_audio_bitrate,
std::string audio_track_id,
uint32_t min_audio_bitrate,
uint32_t max_audio_bitrate,
std::string video_track_id,
uint32_t min_video_bitrate,
uint32_t max_video_bitrate,
uint32_t min_other_bitrate,
uint32_t max_other_bitrate,
uint32_t available_bitrate) {
AudioPriorityBitrateAllocationStrategy allocation_strategy(
audio_track_id, sufficient_audio_bitrate);
std::vector<BitrateAllocationStrategy::TrackConfig> track_configs = {
BitrateAllocationStrategy::TrackConfig(
min_audio_bitrate, max_audio_bitrate, false, audio_track_id),
BitrateAllocationStrategy::TrackConfig(
min_video_bitrate, max_video_bitrate, false, video_track_id),
BitrateAllocationStrategy::TrackConfig(min_other_bitrate,
max_other_bitrate, false, "")};
std::vector<const rtc::BitrateAllocationStrategy::TrackConfig*>
track_config_ptrs = MakeTrackConfigPtrsVector(track_configs);
return allocation_strategy.AllocateBitrates(available_bitrate,
track_config_ptrs);
}
// Test that when the available bitrate is less than the sum of the minimum
// bitrates, the minimum bitrate is allocated for each track.
TEST(AudioPriorityBitrateAllocationStrategyTest, MinAllocateBitrate) {
constexpr uint32_t sufficient_audio_bitrate = 16000;
const std::string audio_track_id = "audio_track";
constexpr uint32_t min_audio_bitrate = 6000;
constexpr uint32_t max_audio_bitrate = 64000;
const std::string video_track_id = "video_track";
constexpr uint32_t min_video_bitrate = 30000;
constexpr uint32_t max_video_bitrate = 300000;
constexpr uint32_t min_other_bitrate = 3000;
constexpr uint32_t max_other_bitrate = 30000;
constexpr uint32_t available_bitrate = 10000;
std::vector<uint32_t> allocations = RunAudioPriorityAllocation(
sufficient_audio_bitrate, audio_track_id, min_audio_bitrate,
max_audio_bitrate, video_track_id, min_video_bitrate, max_video_bitrate,
min_other_bitrate, max_other_bitrate, available_bitrate);
EXPECT_EQ(min_audio_bitrate, allocations[0]);
EXPECT_EQ(min_video_bitrate, allocations[1]);
EXPECT_EQ(min_other_bitrate, allocations[2]);
}
// Test that when the available bitrate is more than the sum of the max
// bitrates, the max bitrate is allocated for each track.
TEST(AudioPriorityBitrateAllocationStrategyTest, MaxAllocateBitrate) {
constexpr uint32_t sufficient_audio_bitrate = 16000;
const std::string audio_track_id = "audio_track";
constexpr uint32_t min_audio_bitrate = 6000;
constexpr uint32_t max_audio_bitrate = 64000;
const std::string video_track_id = "video_track";
constexpr uint32_t min_video_bitrate = 30000;
constexpr uint32_t max_video_bitrate = 300000;
constexpr uint32_t min_other_bitrate = 3000;
constexpr uint32_t max_other_bitrate = 30000;
constexpr uint32_t available_bitrate = 400000;
std::vector<uint32_t> allocations = RunAudioPriorityAllocation(
sufficient_audio_bitrate, audio_track_id, min_audio_bitrate,
max_audio_bitrate, video_track_id, min_video_bitrate, max_video_bitrate,
min_other_bitrate, max_other_bitrate, available_bitrate);
// TODO(bugs.webrtc.org/8541): Until the bug is fixed not audio streams will
// get up to kTransmissionMaxBitrateMultiplier*max_bitrate
constexpr uint32_t video_bitrate =
(available_bitrate - max_audio_bitrate - max_other_bitrate * 2);
EXPECT_EQ(max_audio_bitrate, allocations[0]);
EXPECT_EQ(video_bitrate, allocations[1]);
EXPECT_EQ(max_other_bitrate * 2, allocations[2]);
}
// Test that audio track will get up to sufficient bitrate before video and
// other bitrate will be allocated.
TEST(AudioPriorityBitrateAllocationStrategyTest, AudioPriorityAllocateBitrate) {
constexpr uint32_t sufficient_audio_bitrate = 16000;
const std::string audio_track_id = "audio_track";
constexpr uint32_t min_audio_bitrate = 6000;
constexpr uint32_t max_audio_bitrate = 64000;
const std::string video_track_id = "video_track";
constexpr uint32_t min_video_bitrate = 30000;
constexpr uint32_t max_video_bitrate = 300000;
constexpr uint32_t min_other_bitrate = 3000;
constexpr uint32_t max_other_bitrate = 30000;
constexpr uint32_t available_bitrate = 49000;
std::vector<uint32_t> allocations = RunAudioPriorityAllocation(
sufficient_audio_bitrate, audio_track_id, min_audio_bitrate,
max_audio_bitrate, video_track_id, min_video_bitrate, max_video_bitrate,
min_other_bitrate, max_other_bitrate, available_bitrate);
EXPECT_EQ(sufficient_audio_bitrate, allocations[0]);
EXPECT_EQ(min_video_bitrate, allocations[1]);
EXPECT_EQ(min_other_bitrate, allocations[2]);
}
// Test that bitrate will be allocated evenly after sufficient audio bitrate is
// allocated.
TEST(AudioPriorityBitrateAllocationStrategyTest, EvenAllocateBitrate) {
constexpr uint32_t sufficient_audio_bitrate = 16000;
const std::string audio_track_id = "audio_track";
constexpr uint32_t min_audio_bitrate = 6000;
constexpr uint32_t max_audio_bitrate = 64000;
const std::string video_track_id = "video_track";
constexpr uint32_t min_video_bitrate = 30000;
constexpr uint32_t max_video_bitrate = 300000;
constexpr uint32_t min_other_bitrate = 3000;
constexpr uint32_t max_other_bitrate = 30000;
constexpr uint32_t available_bitrate = 52000;
constexpr uint32_t even_bitrate_increase =
(available_bitrate - sufficient_audio_bitrate - min_video_bitrate -
min_other_bitrate) /
3;
std::vector<uint32_t> allocations = RunAudioPriorityAllocation(
sufficient_audio_bitrate, audio_track_id, min_audio_bitrate,
max_audio_bitrate, video_track_id, min_video_bitrate, max_video_bitrate,
min_other_bitrate, max_other_bitrate, available_bitrate);
EXPECT_EQ(sufficient_audio_bitrate + even_bitrate_increase, allocations[0]);
EXPECT_EQ(min_video_bitrate + even_bitrate_increase, allocations[1]);
EXPECT_EQ(min_other_bitrate + even_bitrate_increase, allocations[2]);
}
// Test that bitrate will be allocated to video after audio and other max
// allocation.
TEST(AudioPriorityBitrateAllocationStrategyTest, VideoAllocateBitrate) {
constexpr uint32_t sufficient_audio_bitrate = 16000;
const std::string audio_track_id = "audio_track";
constexpr uint32_t min_audio_bitrate = 6000;
constexpr uint32_t max_audio_bitrate = 64000;
const std::string video_track_id = "video_track";
constexpr uint32_t min_video_bitrate = 30000;
constexpr uint32_t max_video_bitrate = 300000;
constexpr uint32_t min_other_bitrate = 3000;
constexpr uint32_t max_other_bitrate = 30000;
constexpr uint32_t available_bitrate = 200000;
constexpr uint32_t video_bitrate =
available_bitrate - max_audio_bitrate - max_other_bitrate;
std::vector<uint32_t> allocations = RunAudioPriorityAllocation(
sufficient_audio_bitrate, audio_track_id, min_audio_bitrate,
max_audio_bitrate, video_track_id, min_video_bitrate, max_video_bitrate,
min_other_bitrate, max_other_bitrate, available_bitrate);
EXPECT_EQ(max_audio_bitrate, allocations[0]);
EXPECT_EQ(video_bitrate, allocations[1]);
EXPECT_EQ(max_other_bitrate, allocations[2]);
}
} // namespace rtc
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