[feat] add pacing controller module

src/rtp/rtp_statistics/rtp_statistics.cpp

@@ -0,0 +1,47 @@
+#include "rtp_statistics.h"
+
+#include "log.h"
+
+RtpStatistics::RtpStatistics() {}
+
+RtpStatistics::~RtpStatistics() {}
+
+void RtpStatistics::UpdateSentBytes(uint32_t sent_bytes) {
+  sent_bytes_ += sent_bytes;
+}
+
+void RtpStatistics::UpdateReceiveBytes(uint32_t received_bytes) {
+  received_bytes_ += received_bytes;
+}
+
+void RtpStatistics::UpdatePacketLossRate(uint16_t seq_num) {
+  if (last_received_seq_num_ != 0) {
+    if (last_received_seq_num_ < seq_num) {
+      // seq wrap
+      if (seq_num - last_received_seq_num_ > 0x8000) {
+        lost_packets_num_ += 0xffff - last_received_seq_num_ + seq_num + 1;
+      } else {
+        lost_packets_num_ += seq_num - last_received_seq_num_ - 1;
+      }
+    } else if (last_received_seq_num_ > seq_num) {
+      lost_packets_num_ += 0xffff - last_received_seq_num_ + seq_num + 1;
+    }
+  }
+  last_received_seq_num_ = seq_num;
+}
+
+bool RtpStatistics::Process() {
+  if (!sent_bytes_) {
+    // LOG_INFO("rtp statistics: Send [{} bps]", sent_bytes_);
+  }
+
+  if (!received_bytes_) {
+    // LOG_INFO("rtp statistics: Receive [{} bps]", received_bytes_);
+  }
+
+  sent_bytes_ = 0;
+  received_bytes_ = 0;
+
+  std::this_thread::sleep_for(std::chrono::seconds(1));
+  return true;
+}

src/rtp/rtp_statistics/rtp_statistics.h

@@ -0,0 +1,29 @@
+#ifndef _RTP_STATISTICS_H_
+#define _RTP_STATISTICS_H_
+
+#include "thread_base.h"
+
+class RtpStatistics : public ThreadBase {
+ public:
+  RtpStatistics();
+  virtual ~RtpStatistics();
+
+ public:
+  // send side
+  void UpdateSentBytes(uint32_t sent_bytes);
+
+  // receive side
+  void UpdateReceiveBytes(uint32_t received_bytes);
+  void UpdatePacketLossRate(uint16_t seq_num);
+
+ private:
+  bool Process();
+
+ private:
+  uint32_t sent_bytes_ = 0;
+  uint32_t received_bytes_ = 0;
+  uint16_t last_received_seq_num_ = 0;
+  uint32_t lost_packets_num_ = 0;
+};
+
+#endif