+ unsigned num_cards = global_flags.num_cards; // The mixer might not be ready yet.
+ histograms.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);
+ histograms[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);
+
+ histograms[card_index][frame_index].reset(new Histogram[2]);
+ histograms[card_index][frame_index][0].init_geometric(0.001, 10.0, 30);
+ histograms[card_index][frame_index][1].init_geometric(0.001, 10.0, 30);
+ global_metrics.add("latency_seconds",
+ {{ "measuring_point", measuring_point },
+ { "card", card_index_str },
+ { "frame_age", frame_index_str },
+ { "frame_type", "i/p" }},
+ &histograms[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" }},
+ &histograms[card_index][frame_index][1],
+ Metrics::PRINT_WHEN_NONEMPTY);
+ }
+ }
+}
+
+void print_latency(const string &header, const ReceivedTimestamps &received_ts, bool is_b_frame, int *frameno, LatencyHistogram *histogram)
+{
+ if (received_ts.ts.empty())