+++ /dev/null
-#include "print_latency.h"
-
-#include "flags.h"
-#include "metrics.h"
-#include "mixer.h"
-
-#include <stdio.h>
-#include <algorithm>
-#include <chrono>
-#include <string>
-
-using namespace std;
-using namespace std::chrono;
-
-ReceivedTimestamps find_received_timestamp(const vector<RefCountedFrame> &input_frames)
-{
- unsigned num_cards = global_mixer->get_num_cards();
- assert(input_frames.size() == num_cards * FRAME_HISTORY_LENGTH);
-
- ReceivedTimestamps ts;
- for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- for (unsigned frame_index = 0; frame_index < FRAME_HISTORY_LENGTH; ++frame_index) {
- const RefCountedFrame &input_frame = input_frames[card_index * FRAME_HISTORY_LENGTH + frame_index];
- if (input_frame == nullptr ||
- (frame_index > 0 && input_frame.get() == input_frames[card_index * FRAME_HISTORY_LENGTH + frame_index - 1].get())) {
- ts.ts.push_back(steady_clock::time_point::min());
- } else {
- ts.ts.push_back(input_frame->received_timestamp);
- }
- }
- }
- return ts;
-}
-
-void LatencyHistogram::init(const string &measuring_point)
-{
- unsigned num_cards = global_flags.num_cards; // The mixer might not be ready yet.
- summaries.resize(num_cards * FRAME_HISTORY_LENGTH * 2);
- for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- char card_index_str[64];
- snprintf(card_index_str, sizeof(card_index_str), "%u", card_index);
- summaries[card_index].resize(FRAME_HISTORY_LENGTH);
- for (unsigned frame_index = 0; frame_index < FRAME_HISTORY_LENGTH; ++frame_index) {
- char frame_index_str[64];
- snprintf(frame_index_str, sizeof(frame_index_str), "%u", frame_index);
-
- vector<double> quantiles{0.01, 0.1, 0.25, 0.5, 0.75, 0.9, 0.99};
- summaries[card_index][frame_index].reset(new Summary[3]);
- summaries[card_index][frame_index][0].init(quantiles, 60.0);
- summaries[card_index][frame_index][1].init(quantiles, 60.0);
- summaries[card_index][frame_index][2].init(quantiles, 60.0);
- global_metrics.add("latency_seconds",
- {{ "measuring_point", measuring_point },
- { "card", card_index_str },
- { "frame_age", frame_index_str },
- { "frame_type", "i/p" }},
- &summaries[card_index][frame_index][0],
- (frame_index == 0) ? Metrics::PRINT_ALWAYS : Metrics::PRINT_WHEN_NONEMPTY);
- global_metrics.add("latency_seconds",
- {{ "measuring_point", measuring_point },
- { "card", card_index_str },
- { "frame_age", frame_index_str },
- { "frame_type", "b" }},
- &summaries[card_index][frame_index][1],
- Metrics::PRINT_WHEN_NONEMPTY);
- global_metrics.add("latency_seconds",
- {{ "measuring_point", measuring_point },
- { "card", card_index_str },
- { "frame_age", frame_index_str },
- { "frame_type", "total" }},
- &summaries[card_index][frame_index][2],
- (frame_index == 0) ? Metrics::PRINT_ALWAYS : Metrics::PRINT_WHEN_NONEMPTY);
- }
- }
-}
-
-void print_latency(const char *header, const ReceivedTimestamps &received_ts, bool is_b_frame, int *frameno, LatencyHistogram *histogram)
-{
- if (received_ts.ts.empty())
- return;
-
- const steady_clock::time_point now = steady_clock::now();
-
- if (global_mixer == nullptr) {
- // Kaeru.
- assert(received_ts.ts.size() == 1);
- steady_clock::time_point ts = received_ts.ts[0];
- if (ts != steady_clock::time_point::min()) {
- duration<double> latency = now - ts;
- histogram->summaries[0][0][is_b_frame].count_event(latency.count());
- histogram->summaries[0][0][2].count_event(latency.count());
- }
- } else {
- unsigned num_cards = global_mixer->get_num_cards();
- assert(received_ts.ts.size() == num_cards * FRAME_HISTORY_LENGTH);
- for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- for (unsigned frame_index = 0; frame_index < FRAME_HISTORY_LENGTH; ++frame_index) {
- steady_clock::time_point ts = received_ts.ts[card_index * FRAME_HISTORY_LENGTH + frame_index];
- if (ts == steady_clock::time_point::min()) {
- continue;
- }
- duration<double> latency = now - ts;
- histogram->summaries[card_index][frame_index][is_b_frame].count_event(latency.count());
- histogram->summaries[card_index][frame_index][2].count_event(latency.count());
- }
- }
- }
-
- // 101 is chosen so that it's prime, which is unlikely to get the same frame type every time.
- if (global_flags.print_video_latency && (++*frameno % 101) == 0) {
- // Find min and max timestamp of all input frames that have a timestamp.
- steady_clock::time_point min_ts = steady_clock::time_point::max(), max_ts = steady_clock::time_point::min();
- for (const auto &ts : received_ts.ts) {
- if (ts > steady_clock::time_point::min()) {
- min_ts = min(min_ts, ts);
- max_ts = max(max_ts, ts);
- }
- }
- duration<double> lowest_latency = now - max_ts;
- duration<double> highest_latency = now - min_ts;
-
- printf("%-60s %4.0f ms (lowest-latency input), %4.0f ms (highest-latency input)",
- header, 1e3 * lowest_latency.count(), 1e3 * highest_latency.count());
-
- if (is_b_frame) {
- printf(" [on B-frame; potential extra latency]\n");
- } else {
- printf("\n");
- }
- }
-}
projects / nageru / blobdiff