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Remove streaming_mode as it is always false.

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Change-Id: I489b72985f36fd98413ecf729f7d69476c342851

Bug: webrtc:10618
Change-Id: I489b72985f36fd98413ecf729f7d69476c342851
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/136803
Reviewed-by: Jakob Ivarsson‎ <jakobi@webrtc.org>
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Commit-Queue: Ruslan Burakov <kuddai@google.com>
Cr-Commit-Position: refs/heads/master@{#27948}
This commit is contained in:
Ruslan Burakov
2019-05-14 18:06:52 +02:00
committed by Commit Bot
parent 4fd42974b1
commit 0ac1d993be
5 changed files with 1 additions and 66 deletions
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49
modules/audio_coding/neteq/delay_manager.cc
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@ -31,10 +31,6 @@
namespace {
constexpr int kLimitProbability = 1020054733; // 19/20 in Q30.
constexpr int kLimitProbabilityStreaming = 1073204953; // 1999/2000 in Q30.
constexpr int kMaxStreamingPeakPeriodMs = 600000; // 10 minutes in ms.
constexpr int kCumulativeSumDrift = 2; // Drift term for cumulative sum
// |iat_cumulative_sum_|.
constexpr int kMinBaseMinimumDelayMs = 0;
constexpr int kMaxBaseMinimumDelayMs = 10000;
constexpr int kIatFactor = 32745; // 0.9993 in Q15.
@ -129,13 +125,10 @@ DelayManager::DelayManager(size_t max_packets_in_buffer,
base_target_level_(4), // In Q0 domain.
target_level_(base_target_level_ << 8), // In Q8 domain.
packet_len_ms_(0),
streaming_mode_(false),
last_seq_no_(0),
last_timestamp_(0),
minimum_delay_ms_(0),
maximum_delay_ms_(0),
iat_cumulative_sum_(0),
max_iat_cumulative_sum_(0),
peak_detector_(*peak_detector),
last_pack_cng_or_dtmf_(1),
frame_length_change_experiment_(
@ -212,9 +205,6 @@ int DelayManager::Update(uint16_t sequence_number,
bool reordered = false;
if (packet_len_ms > 0) {
// Cannot update statistics unless |packet_len_ms| is valid.
if (streaming_mode_) {
UpdateCumulativeSums(packet_len_ms, sequence_number);
}
// Inter-arrival time (IAT) in integer "packet times" (rounding down). This
// is the value added to the inter-arrival time histogram.
@ -265,9 +255,6 @@ int DelayManager::Update(uint16_t sequence_number,
}
// Calculate new |target_level_| based on updated statistics.
target_level_ = CalculateTargetLevel(iat_packets, reordered);
if (streaming_mode_) {
target_level_ = std::max(target_level_, max_iat_cumulative_sum_);
}
LimitTargetLevel();
} // End if (packet_len_ms > 0).
@ -305,32 +292,6 @@ int DelayManager::CalculateRelativePacketArrivalDelay() const {
return relative_delay;
}
void DelayManager::UpdateCumulativeSums(int packet_len_ms,
uint16_t sequence_number) {
// Calculate IAT in Q8, including fractions of a packet (i.e., more
// accurate than |iat_packets|.
int iat_packets_q8 =
(packet_iat_stopwatch_->ElapsedMs() << 8) / packet_len_ms;
// Calculate cumulative sum IAT with sequence number compensation. The sum
// is zero if there is no clock-drift.
iat_cumulative_sum_ +=
(iat_packets_q8 -
(static_cast<int>(sequence_number - last_seq_no_) << 8));
// Subtract drift term.
iat_cumulative_sum_ -= kCumulativeSumDrift;
// Ensure not negative.
iat_cumulative_sum_ = std::max(iat_cumulative_sum_, 0);
if (iat_cumulative_sum_ > max_iat_cumulative_sum_) {
// Found a new maximum.
max_iat_cumulative_sum_ = iat_cumulative_sum_;
max_iat_stopwatch_ = tick_timer_->GetNewStopwatch();
}
if (max_iat_stopwatch_->ElapsedMs() > kMaxStreamingPeakPeriodMs) {
// Too long since the last maximum was observed; decrease max value.
max_iat_cumulative_sum_ -= kCumulativeSumDrift;
}
}
// Enforces upper and lower limits for |target_level_|. The upper limit is
// chosen to be minimum of i) 75% of |max_packets_in_buffer_|, to leave some
// headroom for natural fluctuations around the target, and ii) equivalent of
@ -363,9 +324,6 @@ void DelayManager::LimitTargetLevel() {
int DelayManager::CalculateTargetLevel(int iat_packets, bool reordered) {
int limit_probability = histogram_quantile_;
if (streaming_mode_) {
limit_probability = kLimitProbabilityStreaming;
}
int bucket_index = histogram_->Quantile(limit_probability);
int target_level;
@ -415,15 +373,11 @@ int DelayManager::SetPacketAudioLength(int length_ms) {
void DelayManager::Reset() {
packet_len_ms_ = 0; // Packet size unknown.
streaming_mode_ = false;
peak_detector_.Reset();
histogram_->Reset();
base_target_level_ = 4;
target_level_ = base_target_level_ << 8;
packet_iat_stopwatch_ = tick_timer_->GetNewStopwatch();
max_iat_stopwatch_ = tick_timer_->GetNewStopwatch();
iat_cumulative_sum_ = 0;
max_iat_cumulative_sum_ = 0;
last_pack_cng_or_dtmf_ = 1;
}
@ -538,9 +492,6 @@ int DelayManager::GetBaseMinimumDelay() const {
int DelayManager::base_target_level() const {
return base_target_level_;
}
void DelayManager::set_streaming_mode(bool value) {
streaming_mode_ = value;
}
int DelayManager::last_pack_cng_or_dtmf() const {
return last_pack_cng_or_dtmf_;
}