/* ------------------------------------------------------------------ * Copyright (C) 1998-2009 PacketVideo * * 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. * ------------------------------------------------------------------- */ // -*- c++ -*- // = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = // P V M F _ T I M E S T A M P // = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = /** * @file pvmf_timestamp.h * @brief This file defines the PV Multimedia Framework (PVMF) timestamp class * which holds a 32-bit continuous timestamp that periodically wraps back to zero. * */ #ifndef PVMF_TIMESTAMP_H_INCLUDED #define PVMF_TIMESTAMP_H_INCLUDED #ifndef OSCL_BASE_H_INCLUDED #include "oscl_base.h" #endif /** * PVMFTimestamp is a circular (i.e., value wraps after max int) * 32-bit timestamp container. */ typedef uint32 PVMFTimestamp; const PVMFTimestamp PVMFTIMESTAMP_LESSTHAN_THRESHOLD = 0x80000000; /** * Compares two timestamps and reports if the first occurred before (is less than) * the second value. * @param a first timestamp value in the comparison * @param b second timestamp value in the comparison * @return true if a < b, false otherwise. * */ OSCL_IMPORT_REF bool lessthan(const PVMFTimestamp& a, const PVMFTimestamp& b, PVMFTimestamp threshold = PVMFTIMESTAMP_LESSTHAN_THRESHOLD); typedef struct PVMFTimeValue { uint32 time_val; uint32 time_units; } _PVMFTimeValue; #endif