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45 lines
1012 B
45 lines
1012 B
#pragma once
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extern "C" {
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#include <libavutil/mem.h>
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}
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#include <stdexcept>
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#include <memory>
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namespace av {
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// Generic error class
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struct error : public std::runtime_error {
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using runtime_error::runtime_error;
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};
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// Type of a freeing function (for unique_ptr)
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template <typename T>
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using deleter = void(*)(T*);
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// Often used type
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template <typename T>
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using unique_ptr = std::unique_ptr<T, deleter<T>>;
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// Allocator
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template <typename T>
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struct allocator {
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using value_type = T;
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using size_type = size_t;
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T* allocate(size_type n) const {
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auto ptr = av_malloc(n * sizeof(T));
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if(!ptr) throw std::bad_alloc();
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return static_cast<T*>(ptr);
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}
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void deallocate(T* ptr, size_type /*n*/) const noexcept {
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av_free(ptr);
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}
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};
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template <typename T, typename S>
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bool operator==(allocator<T> const &, allocator<S> const &) noexcept { return true; }
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template <typename T, typename S>
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bool operator!=(allocator<T> const &, allocator<S> const &) noexcept { return false; }
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}
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