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Diffstat (limited to 'libvideoeditor/osal/src/M4OSA_Clock.c')
| -rwxr-xr-x | libvideoeditor/osal/src/M4OSA_Clock.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/libvideoeditor/osal/src/M4OSA_Clock.c b/libvideoeditor/osal/src/M4OSA_Clock.c new file mode 100755 index 0000000..9148fe6 --- /dev/null +++ b/libvideoeditor/osal/src/M4OSA_Clock.c @@ -0,0 +1,126 @@ +/* + * Copyright (C) 2004-2011 NXP Software + * Copyright (C) 2011 The Android Open Source Project + * + * 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. + */ + + +/** + ************************************************************************ + * @file M4OSA_Clock.c + * @brief Clock related functions + * @note This file implements functions to manipulate clock + ************************************************************************ +*/ + +#include <sys/time.h> +#include <time.h> + +#include "M4OSA_Debug.h" +#include "M4OSA_Clock.h" +#include "M4OSA_Memory.h" +#include "M4OSA_Types.h" + + + + +/** + ************************************************************************ + * @brief This function gets an absolute time to an unknown reference with + * a high precision. + * @note It means it can only be used to get a relative time by computing + * differences between to times. + * It is to the caller to allocate time. Time is expressed in + * timescale unit. + * M4OSA_ROLLOVER_CLOCK in M4OSA_Types.h must be configured with the rollover + * offset of this function. + * @param time: (IN/OUT) time + * @param timescale: (IN) The timescale (time unit per second) + * @return M4NO_ERROR: there is no error + * @return M4ERR_PARAMETER: at least one parameter is NULL + * @return M4WAR_TIMESCALE_TOO_BIG: the precision of the system clock is + * not + * compliant with the input timescale + ************************************************************************ +*/ +M4OSA_ERR M4OSA_clockGetTime(M4OSA_Time* pTime, M4OSA_UInt32 timescale) +{ + struct timeval tv; + struct timezone tz; +#ifdef M4OSA_64BITS_NOT_SUPPORTED + M4OSA_UInt32 u32_time = 0; + M4OSA_UInt32 u32_time_hi; + M4OSA_UInt32 u32_time_lo; + M4OSA_UInt32 u32_time_lh; +#else /* M4OSA_64BITS_SUPPORTED */ + M4OSA_Int64 i64_time = 0; + M4OSA_Int64 i64_time_hi; + M4OSA_Int64 i64_time_lo; + M4OSA_Int64 i64_temp; +#endif /* M4OSA_64BITS_SUPPORTED */ + M4OSA_UInt32 factor; + + M4OSA_TRACE1_2("M4OSA_clockGetTime\t\tM4OSA_Time* 0x%x\tM4OSA_UInt32 %d", + pTime, timescale); + + M4OSA_DEBUG_IF2(M4OSA_NULL == pTime, M4ERR_PARAMETER, + "M4OSA_clockGetTime: pTime is M4OSA_NULL"); + M4OSA_DEBUG_IF2(0 == timescale, M4ERR_PARAMETER, + "M4OSA_clockGetTime: timescale is 0"); + + factor = 1000000 / timescale; + + if(gettimeofday(&tv, &tz) == 0) + { +#ifdef M4OSA_64BITS_NOT_SUPPORTED + u32_time_lo = (tv.tv_sec & 0xFFFF) * timescale; + u32_time_hi = (((tv.tv_sec >> 16) & 0xFFFF) * timescale) + ((u32_time_lo >> 16) & 0xFFFF); + u32_time_lo &= 0xFFFF; + u32_time_lo += tv.tv_usec / factor; + u32_time_hi += ((u32_time_lo >> 16) & 0xFFFF); + u32_time_lo &= 0xFFFF; + u32_time = ((u32_time_hi & 0x7FFF) << 16) | u32_time_lo; +#else /* M4OSA_64BITS_SUPPORTED */ + tv.tv_usec /= factor; + M4OSA_INT64_FROM_INT32_UINT32(i64_time_hi, 0, tv.tv_sec); + M4OSA_INT64_FROM_INT32_UINT32(i64_time_lo, 0, tv.tv_usec); + M4OSA_INT64_SCALAR_PRODUCT(i64_temp, i64_time_hi, timescale); + M4OSA_INT64_ADD(i64_time, i64_temp, i64_time_lo); +#endif /* M4OSA_64BITS_SUPPORTED */ + } + +#ifdef M4OSA_64BITS_NOT_SUPPORTED + /* M4OSA_Time is signed, so we need to check the max value*/ + if (u32_time > M4OSA_INT32_MAX) + { + u32_time = u32_time - M4OSA_INT32_MAX; + } + + *pTime = (M4OSA_Time)u32_time; + + if( timescale > 10000 ) + { + return M4WAR_TIMESCALE_TOO_BIG; + } +#else /* M4OSA_64BITS_SUPPORTED */ + *pTime = (M4OSA_Time)i64_time; + + if( timescale > 1000000 ) + { + return M4WAR_TIMESCALE_TOO_BIG; + } +#endif /* M4OSA_64BITS_SUPPORTED */ + + return M4NO_ERROR; +} |