/*
 * Copyright 2008 Arsen Chaloyan
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __MPF_RTP_STAT_H__
#define __MPF_RTP_STAT_H__

/**
 * @file mpf_rtp_stat.h
 * @brief RTP/RTCP Statistics
 */ 

#include "mpf.h"

APT_BEGIN_EXTERN_C

/** RTP receiver statistics */
typedef struct rtp_rx_stat_t rtp_rx_stat_t;

/** RTCP statistics used in Sender Report (SR) */
typedef struct rtcp_sr_stat_t rtcp_sr_stat_t;
/** RTCP statistics used in Receiver Report (RR) */
typedef struct rtcp_rr_stat_t rtcp_rr_stat_t;


/** RTP receiver statistics */
struct rtp_rx_stat_t {
	/** number of valid RTP packets received */
	apr_uint32_t received_packets;
	/** number of invalid RTP packets received */
	apr_uint32_t invalid_packets;

	/** number of discarded in jitter buffer packets */
	apr_uint32_t discarded_packets;
	/** number of ignored packets */
	apr_uint32_t ignored_packets;

	/** number of lost in network packets */
	apr_uint32_t lost_packets;

	/** number of restarts */
	apr_byte_t   restarts;
};

/** RTCP statistics used in Sender Report (SR)  */
struct rtcp_sr_stat_t {
	/** sender source identifier */
	apr_uint32_t ssrc;
	/** NTP timestamp (seconds) */
	apr_uint32_t ntp_sec;
	/** NTP timestamp (fractions) */
	apr_uint32_t ntp_frac;
	/** RTP timestamp */
	apr_uint32_t rtp_ts;
	/* packets sent */
	apr_uint32_t sent_packets;
	/* octets (bytes) sent */
	apr_uint32_t sent_octets;
};

/** RTCP statistics used in Receiver Report (RR) */
struct rtcp_rr_stat_t {
	/** source identifier of RTP stream being received */
	apr_uint32_t ssrc;
	/** fraction lost since last SR/RR */
	apr_uint32_t fraction:8;
	/** cumulative number of packets lost (signed!) */
	apr_int32_t  lost:24;
	/** extended last sequence number received */
	apr_uint32_t last_seq;
	/** interarrival jitter (RFC3550) */
	apr_uint32_t jitter;
	/** last SR packet from this source */
	apr_uint32_t lsr;
	/** delay since last SR packet */
	apr_uint32_t dlsr;
};



/** Reset RTCP SR statistics */
static APR_INLINE void mpf_rtcp_sr_stat_reset(rtcp_sr_stat_t *sr_stat)
{
	memset(sr_stat,0,sizeof(rtcp_sr_stat_t));
}

/** Reset RTCP RR statistics */
static APR_INLINE void mpf_rtcp_rr_stat_reset(rtcp_rr_stat_t *rr_stat)
{
	memset(rr_stat,0,sizeof(rtcp_rr_stat_t));
}

/** Reset RTP receiver statistics */
static APR_INLINE void mpf_rtp_rx_stat_reset(rtp_rx_stat_t *rx_stat)
{
	memset(rx_stat,0,sizeof(rtp_rx_stat_t));
}

APT_END_EXTERN_C

#endif /*__MPF_RTP_STAT_H__*/
