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Copyright (c) 2016-2017, Harman International Industries, Incorporated
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/*
* HEADER SUMMARY : AVTP Time public interface
*/

#ifndef OPENAVB_AVTP_TIME_PUB_H
#define OPENAVB_AVTP_TIME_PUB_H 1

#include "openavb_platform_pub.h"
#include "openavb_types_pub.h"

/** \file
 * AVTP Time public interface.
 */

/// standard timespec type.
typedef struct timespec timespec_t;

/** AVTP time structure.
 */
typedef struct {
	/// Time in nanoseconds.
	U64 timeNsec;

	/// Maximum latency. Timestamps greater than now + max latency will be considered uncertain.
	U64 maxLatencyNsec;

	/// Timestamp valid.
	bool bTimestampValid;

	/// Timestamp uncertain.
	bool bTimestampUncertain;
} avtp_time_t;


/** Create a avtp_time_t structure.
 *
 * Allocate storage for a avtp_time_t structure. When a media queue items are
 * created an avtp_time_t structure is allocated for each item. Interface
 * modules do not need to be concerned with doing this.
 *
 * \param maxLatencyUsec Maximum Latency (in usec) for the avtp_time_t
 *        structure. Timestamps greater than now + maximum latency are
 *        considered uncertain.
 * \return A pointer to the avtp_time_t structure. Returns NULL if the memory
 *         could not be allocated.
 */
avtp_time_t * openavbAvtpTimeCreate(U32 maxLatencyUsec);

/** Delete the time struct.
 *
 * Delete the avtp_time_t structure and any additional allocations it owns.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 */
void openavbAvtpTimeDelete(avtp_time_t *pAvtpTime);

/** Set to wall time (gPTP time).
 *
 * Set the time in the avtp_time_t structure to that of the synchronized PTP
 * time. An interface module will normally use this function to set the time
 * that media data was placed into the media queue.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 */
void openavbAvtpTimeSetToWallTime(avtp_time_t *pAvtpTime);

/** Set to system time.
 *
 * Set the time in the avtp_time_t structure to that of the system time on the
 * device.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 */
void openavbAvtpTimeSetToSystemTime(avtp_time_t *pAvtpTime);

/** Set to timestamp.
 *
 * Set the time in the avtp_time_t structure to the value of the timestamp
 * parameter which is in the same format as an AVTP timestamp.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param timestamp A timestamp in the same format as the 1722 AVTP timestamp.
 */
void openavbAvtpTimeSetToTimestamp(avtp_time_t *pAvtpTime, U32 timestamp);

/** Set to timestamp.
 *
 * Set the time in the avtp_time_t structure to the value of timespec_t
 * *timestamp.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param timestamp A timestamp in the timespec_t format.
 */
void openavbAvtpTimeSetToTimespec(avtp_time_t *pAvtpTime, timespec_t* timestamp);

/** Set to nanosecond timestamp.
 *
 * Set the time in the avtp_time_t structure to the value of U64
 * timeNS.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param timeNS A U64 timestamp in nanoseconds.
 */
void openavbAvtpTimeSetToTimestampNS(avtp_time_t *pAvtpTime, U64 timeNS);

/** Push a timestamp, for use in Media Clock Recovery (MCR).
 * \note Not available in all platforms.
 *
 * Push a timestamp, for use in Media Clock Recover (MCR). *pAvtpTime is not
 * modified.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param timestamp A timestamp in the same format as the 1722 AVTP timestamp.
 */
void openavbAvtpTimePushMCR(avtp_time_t *pAvtpTime, U32 timestamp);

/** Set the AVTP timestamp valid indicator.
 *
 * Sets the indicator for AVTP timestamp is valid or not.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param validFlag Flag indicating is timestamp is valid.
 */
void openavbAvtpTimeSetTimestampValid(avtp_time_t *pAvtpTime, bool validFlag);

/** Set the AVTP timestamp uncertain indicator.
 *
 * Sets the indicator for AVTP timestamp is uncertain or not.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param uncertainFlag Flag indicating is timestamp is uncertain.
 */
void openavbAvtpTimeSetTimestampUncertain(avtp_time_t *pAvtpTime, bool uncertainFlag);

/** Add microseconds to the time.
 *
 * Add the number of microseconds passed in to the time stored in avtp_time_t.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param uSec Number of microseconds to add to the stored time.
 */
void openavbAvtpTimeAddUSec(avtp_time_t *pAvtpTime, long uSec);

/** Add nanoseconds to the time.
 *
 * Add the number of nanoseconds passed in to the time stored in avtp_time_t.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param nSec Number of nanoseconds to add to the stored time.
 */
void openavbAvtpTimeAddNSec(avtp_time_t *pAvtpTime, long nSec);

/** Subtract microseconds from the time
 *
 * Subtract the number of microseconds passed in from the time
 * stored in avtp_time_t. 
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param uSec Number of microseconds to subtract from the 
 *  	  stored time.
 */
void openavbAvtpTimeSubUSec(avtp_time_t *pAvtpTime, long uSec);

/** Subtract nanoseconds from the time
 *
 * Subtract the number of nanoseconds passed in from the time
 * stored in avtp_time_t. 
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param nSec Number of nanoseconds to subtract from the stored
 *  	  time.
 */
void openavbAvtpTimeSubNSec(avtp_time_t *pAvtpTime, long nSec);

/** Get AVTP timestamp
 *
 * Get the time stored in avtp_time_t and return it in an AVTP timestamp format
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \return Returns an integer (U32) in the same format as a 1722 AVTP Timestamp.
 */
U32 openavbAvtpTimeGetAvtpTimestamp(avtp_time_t *pAvtpTime);

/** Get AVTP timestamp in nanoseconds
 *
 * Get the time stored in avtp_time_t and return it as a full time value in nanoseconds
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \return Returns an integer (U64) of the full walltime in 
 *  	   nanoseconds.
 */
U64 openavbAvtpTimeGetAvtpTimeNS(avtp_time_t *pAvtpTime);

/** Get the AVTP timestamp valid indicator.
 *
 * Gets the indicator for AVTP timestamp is valid or not.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \return Returns TRUE if the AVTP timestamp valid indicator is set otherwise
 *         FALSE.
 */
bool openavbAvtpTimeTimestampIsValid(avtp_time_t *pAvtpTime);

/** Get the AVTP timestamp uncertain indicator.
 *
 * Gets the indicator for AVTP timestamp is uncertain or not.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \return Returns TRUE if the AVTP timestamp uncertain indicator is set
 *         otherwise FALSE.
 */
bool openavbAvtpTimeTimestampIsUncertain(avtp_time_t *pAvtpTime);

/** Check if time is in the past.
 *
 * Checks if the time stored in avtp_time_t is past the PTP wall time.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \return Returns TRUE if time is in the past otherwise FALSE.
 */
bool openavbAvtpTimeIsPast(avtp_time_t *pAvtpTime);

/** Check if time is in the past a specific time (PTP time)
 *
 * Checks if the time stored in avtp_time_t is past the time 
 * passed in. 
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure. 
 * \param nSecTime Time in nanoseconds to compare against.
 * \return Returns TRUE if time is in the past otherwise FALSE.
 */
bool openavbAvtpTimeIsPastTime(avtp_time_t *pAvtpTime, U64 nSecTime);

/** Determines microseconds until PTP time.
 *
 * Returns the number of microseconds until the time stored in avtp_time_t
 * reaches the PTP time.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \param pUsecTill An output parameter that is set with the number of
 *        microseconds until the time is reached.
 * \return Return FALSE if greater than 5 second otherwise TRUE.
 */
bool openavbAvtpTimeUsecTill(avtp_time_t *pAvtpTime, U32 *pUsecTill);

/** Returns delta from timestamp and now.
 *
 * Returns difference between timestamp and current time.
 *
 * \param pAvtpTime A pointer to the avtp_time_t structure.
 * \return Difference in microseconds between timestamp and now.
 */
S32 openavbAvtpTimeUsecDelta(avtp_time_t *pAvtpTime);

#endif  // OPENAVB_AVTP_TIME_PUB_H