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-rw-r--r--src/ManagementServer.cpp145
-rw-r--r--src/ManagementServer.h28
2 files changed, 93 insertions, 80 deletions
diff --git a/src/ManagementServer.cpp b/src/ManagementServer.cpp
index 5741e38..201fc7b 100644
--- a/src/ManagementServer.cpp
+++ b/src/ManagementServer.cpp
@@ -355,21 +355,10 @@ void ManagementServer::update_ptree(const boost::property_tree::ptree& pt)
/************************************************/
-InputStat::InputStat(const std::string& name)
- : m_name(name)
+InputStat::InputStat(const std::string& name) :
+ m_name(name),
+ m_time_last_event(std::chrono::steady_clock::now())
{
- /* Statistics */
- m_num_underruns = 0;
- m_num_overruns = 0;
-
- /* State handling */
- m_time_last_event = std::chrono::steady_clock::now();
- m_glitch_counter = 0;
- m_silence_counter = 0;
-
- m_buffer_fill_stats.clear();
- m_peaks_left.clear();
- m_peaks_right.clear();
}
InputStat::~InputStat()
@@ -386,61 +375,65 @@ void InputStat::notifyBuffer(long bufsize)
{
unique_lock<mutex> lock(m_mutex);
- m_buffer_fill_stats.push_front(bufsize);
-
using namespace std::chrono;
const auto time_now = steady_clock::now();
- if (m_buffer_fill_stats.size() > 1) {
- auto insertion_interval = time_now - m_time_last_buffer_notify;
- auto total_length = insertion_interval * m_buffer_fill_stats.size();
+ m_buffer_fill_stats.push_front({time_now, bufsize});
- if (total_length > BUFFER_STATS_KEEP_DURATION) {
- m_buffer_fill_stats.pop_back();
- }
- }
- m_time_last_buffer_notify = time_now;
+ // Keep only stats whose timestamp are more recent than
+ // BUFFER_STATS_KEEP_DURATION ago
+ m_buffer_fill_stats.erase(remove_if(
+ m_buffer_fill_stats.begin(), m_buffer_fill_stats.end(),
+ [&](const fill_stat_t& fs) {
+ return fs.timestamp + BUFFER_STATS_KEEP_DURATION < time_now;
+ }),
+ m_buffer_fill_stats.end());
}
void InputStat::notifyPeakLevels(int peak_left, int peak_right)
{
unique_lock<mutex> lock(m_mutex);
- m_peaks_left.push_front(peak_left);
- m_peaks_right.push_front(peak_right);
-
using namespace std::chrono;
-
const auto time_now = steady_clock::now();
- if (m_peaks_left.size() < 2) {
- m_time_last_peak_notify = time_now;
- }
- else {
- const auto insertion_interval = time_now - m_time_last_peak_notify;
- const auto peaks_total_length = insertion_interval * m_peaks_left.size();
-
- if (peaks_total_length > PEAK_STATS_KEEP_DURATION) {
- m_peaks_left.pop_back();
- m_peaks_right.pop_back();
- }
+ m_peak_stats.push_front({time_now, peak_left, peak_right});
- m_time_last_peak_notify = time_now;
+ // Keep only stats whose timestamp are more recent than
+ // BUFFER_STATS_KEEP_DURATION ago
+ m_peak_stats.erase(remove_if(
+ m_peak_stats.begin(), m_peak_stats.end(),
+ [&](const peak_stat_t& ps) {
+ return ps.timestamp + PEAK_STATS_KEEP_DURATION < time_now;
+ }),
+ m_peak_stats.end());
+ if (m_peak_stats.size() >= 2) {
// Calculate the peak over the short window
- m_short_window_length = PEAK_STATS_SHORT_WINDOW / insertion_interval;
- const size_t short_window = std::min(
- m_peaks_left.size(), m_short_window_length);
- const auto max_left = *max_element(m_peaks_left.begin(),
- m_peaks_left.begin() + short_window);
- const auto max_right = *max_element(m_peaks_right.begin(),
- m_peaks_right.begin() + short_window);
-
- // State
-
- // using the lower of the two channels allows us to detect if only one
+ vector<peak_stat_t> short_peaks;
+ copy_if(m_peak_stats.begin(), m_peak_stats.end(),
+ back_inserter(short_peaks),
+ [&](const peak_stat_t& ps) {
+ return ps.timestamp + PEAK_STATS_SHORT_WINDOW >= time_now;
+ });
+
+ const auto& short_left_peak_max = max_element(
+ short_peaks.begin(), short_peaks.end(),
+ [](const peak_stat_t& lhs, const peak_stat_t& rhs) {
+ return lhs.peak_left < rhs.peak_left;
+ });
+
+ const auto& short_right_peak_max = max_element(
+ short_peaks.begin(), short_peaks.end(),
+ [](const peak_stat_t& lhs, const peak_stat_t& rhs) {
+ return lhs.peak_right < rhs.peak_right;
+ });
+
+ // Using the lower of the two channels allows us to detect if only one
// channel is silent.
- const int lower_peak = max_left < max_right ? max_left : max_right;
+ const int lower_peak = min(
+ short_left_peak_max->peak_left, short_right_peak_max->peak_right);
+ // State
const int16_t int16_max = std::numeric_limits<int16_t>::max();
int peak_dB = lower_peak ?
round(20*log10((double)lower_peak / int16_max)) :
@@ -474,8 +467,7 @@ void InputStat::notifyUnderrun(void)
else {
// As we don't receive level notifications anymore, clear the
// audio level information
- m_peaks_left.clear();
- m_peaks_right.clear();
+ m_peak_stats.clear();
}
}
@@ -506,16 +498,28 @@ std::string InputStat::encodeValuesJSON()
int peak_left = 0;
int peak_right = 0;
- if (not m_peaks_left.empty() and not m_peaks_right.empty()) {
- peak_left = *max_element(m_peaks_left.begin(), m_peaks_left.end());
- peak_right = *max_element(m_peaks_right.begin(), m_peaks_right.end());
-
- if (m_peaks_left.size() >= m_short_window_length and
- m_peaks_right.size() >= m_short_window_length) {
- peak_left_short = *max_element(m_peaks_left.begin(),
- m_peaks_left.begin() + m_short_window_length);
- peak_right_short = *max_element(m_peaks_right.begin(),
- m_peaks_right.begin() + m_short_window_length);
+ if (not m_peak_stats.empty()) {
+ peak_left = max_element(m_peak_stats.begin(), m_peak_stats.end(),
+ [](const peak_stat_t& lhs, const peak_stat_t& rhs) {
+ return lhs.peak_left < rhs.peak_left;
+ })->peak_left;
+ peak_right = max_element(m_peak_stats.begin(), m_peak_stats.end(),
+ [](const peak_stat_t& lhs, const peak_stat_t& rhs) {
+ return lhs.peak_right < rhs.peak_right;
+ })->peak_right;
+
+ if (m_peak_stats.size() > m_short_window_length) {
+ peak_left_short = max_element(m_peak_stats.begin(),
+ m_peak_stats.begin() + m_short_window_length,
+ [](const peak_stat_t& lhs, const peak_stat_t& rhs) {
+ return lhs.peak_left < rhs.peak_left;
+ })->peak_left;
+
+ peak_right_short = max_element(m_peak_stats.begin(),
+ m_peak_stats.begin() + m_short_window_length,
+ [](const peak_stat_t& lhs, const peak_stat_t& rhs) {
+ return lhs.peak_right < rhs.peak_right;
+ })->peak_right;
}
else {
peak_left_short = peak_left;
@@ -526,10 +530,13 @@ std::string InputStat::encodeValuesJSON()
long min_fill_buffer = MIN_FILL_BUFFER_UNDEF;
long max_fill_buffer = 0;
if (not m_buffer_fill_stats.empty()) {
- auto buffer_min_max_fill = minmax_element(m_buffer_fill_stats.begin(),
- m_buffer_fill_stats.end());
- min_fill_buffer = *buffer_min_max_fill.first;
- max_fill_buffer = *buffer_min_max_fill.second;
+ const auto& buffer_min_max_fill = minmax_element(
+ m_buffer_fill_stats.begin(), m_buffer_fill_stats.end(),
+ [](const fill_stat_t& lhs, const fill_stat_t& rhs) {
+ return lhs.bufsize < rhs.bufsize;
+ });
+ min_fill_buffer = buffer_min_max_fill.first->bufsize;
+ max_fill_buffer = buffer_min_max_fill.second->bufsize;
}
/* convert to dB */
@@ -596,7 +603,7 @@ input_state_t InputStat::determineState()
*/
if (std::all_of(
m_buffer_fill_stats.begin(), m_buffer_fill_stats.end(),
- [](long fill) { return fill == 0; }) ) {
+ [](const fill_stat_t& fs) { return fs.bufsize == 0; }) ) {
state = input_state_t::NoData;
}
/* Otherwise, the state depends on the glitch counter */
diff --git a/src/ManagementServer.h b/src/ManagementServer.h
index 17b8bda..18af48c 100644
--- a/src/ManagementServer.h
+++ b/src/ManagementServer.h
@@ -107,28 +107,34 @@ class InputStat
std::string m_name;
/************ STATISTICS ***********/
- // Calculate minimum and maximum buffer fill from
- // a FIFO of values from the last few seconds
- std::deque<long> m_buffer_fill_stats;
- std::chrono::time_point<std::chrono::steady_clock> m_time_last_buffer_notify;
+ // Keep track of buffer fill with timestamps, so that we
+ // can calculate the correct state from it.
+ struct fill_stat_t {
+ std::chrono::time_point<std::chrono::steady_clock> timestamp;
+ long bufsize;
+ };
+ std::deque<fill_stat_t> m_buffer_fill_stats;
// counter of number of overruns and underruns since startup
- uint32_t m_num_underruns;
- uint32_t m_num_overruns;
+ uint32_t m_num_underruns = 0;
+ uint32_t m_num_overruns = 0;
// Peak audio levels (linear 16-bit PCM) for the two channels.
// Keep a FIFO of values from the last minutes, apply
// a short window to also see short-term fluctuations.
- std::deque<int> m_peaks_left;
- std::deque<int> m_peaks_right;
- std::chrono::time_point<std::chrono::steady_clock> m_time_last_peak_notify;
+ struct peak_stat_t {
+ std::chrono::time_point<std::chrono::steady_clock> timestamp;
+ int peak_left;
+ int peak_right;
+ };
+ std::deque<peak_stat_t> m_peak_stats;
size_t m_short_window_length = 0;
/************* STATE ***************/
/* Variables used for determining the input state */
- int m_glitch_counter; // saturating counter
- int m_silence_counter; // saturating counter
+ int m_glitch_counter = 0; // saturating counter
+ int m_silence_counter = 0; // saturating counter
std::chrono::time_point<std::chrono::steady_clock> m_time_last_event;
// The mutex that has to be held during all notify and readout