#ifndef _MEDIA_HELPER_H_
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#define _MEDIA_HELPER_H_
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#include <stdint.h>
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#include <sys/time.h>
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#include <algorithm>
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#define MH_SUBSAMPLE1(v, a) ((((v) + (a) - 1)) / (a))
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#define MH_SUBSAMPLE2(v, a, s) (v < 0) ? (-((-v + a) >> s)) : ((v + a) >> s)
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#define MH_F_Z 0.00000001f //0.000000001f
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#define MH_F_LT(x1, x2) (x1 < x2) //#todo
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#define MH_F_GT(x1, x2) (x1 > x2)
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#define MH_F_LTEQ(x1, x2) (x1 <= x2)
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#define MH_F_GTEQ(x1, x2) (x1 >= x2)
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#define MH_F_ZEQ(x) (x + MH_F_Z > 0.0f && x - MH_F_Z < 0.0f)
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inline void microseconds_to_timeval(uint64_t v1, timeval& v2)
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{
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v2.tv_sec = v1 / 1000 / 1000;
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v2.tv_usec = v1 % 1000;
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}
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inline timeval microseconds_to_timeval(uint64_t v1)
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{
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timeval v2;
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v2.tv_sec = v1 / 1000 / 1000;
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v2.tv_usec = v1 % 1000;
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return v2;
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}
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inline uint64_t timeval_to_microseconds(const timeval& v2)
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{
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return (v2.tv_sec * 1000 * 1000 + v2.tv_usec);
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}
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template<typename TPoolPtr, typename TPoolElem>
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struct PoolElemLocker
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{
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TPoolPtr pool;
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TPoolElem elem;
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PoolElemLocker(TPoolPtr _pool, TPoolElem _elem) : pool(_pool), elem(_elem)
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{
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}
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~PoolElemLocker()
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{
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pool->release(elem);
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pool->notify_free();
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}
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};
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template<typename TArrayPtr>
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struct ArrayDeleter
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{
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TArrayPtr array;
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ArrayDeleter(TArrayPtr _array) : array(_array)
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{
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}
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~ArrayDeleter()
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{
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delete[] array;
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}
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};
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template<typename T>
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struct ScopeLocker;
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template<>
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struct ScopeLocker<pthread_mutex_t>
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{
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pthread_mutex_t* mut;
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ScopeLocker(pthread_mutex_t* _mut) : mut(_mut) { if (mut) pthread_mutex_lock(mut); }
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~ScopeLocker(){ if (mut) pthread_mutex_unlock(mut); }
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};
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uint8_t* base64_decode(char const* in, size_t inSize, size_t& resultSize, bool trimTrailingZeros = true);
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char* base64_encode(char const* orig, size_t origLength);
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class SPropRecord;
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SPropRecord* parseSPropParameterSets(char const* sPropParameterSetsStr, int& numSPropRecords);
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template <typename T>
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T clamp(const T& n, const T& n1, const T& n2)
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{
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if (n1 < n2)
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{
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if (n < n1) return n1;
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else if(n > n2) return n2;
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else return n;
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}
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else
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{
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if (n < n2) return n1;
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else if(n > n1) return n2;
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else return n;
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}
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return n;
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}
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#endif
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