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/*
Copyright (C) 2012-2022 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include <dcp/warnings.h>
LIBDCP_DISABLE_WARNINGS
extern "C" {
#include <libavutil/avutil.h>
}
LIBDCP_ENABLE_WARNINGS
#include <new>
#include <stdexcept>
void *
wrapped_av_malloc(size_t s)
{
auto p = av_malloc(s);
if (!p) {
throw std::bad_alloc();
}
return p;
}
void
fill_memory(void* ptr, size_t bytes, uint64_t value)
{
if (bytes == 0) {
return;
}
auto const start = std::min(bytes, sizeof(value) - reinterpret_cast<uintptr_t>(ptr) % sizeof(value));
auto start_ptr = reinterpret_cast<uint8_t*>(ptr);
if (start < 8) {
for (auto i = 0UL; i < start; ++i) {
*start_ptr++ = value & 0xff;
value = (value >> 8) | ((value & 0xff) << 56);
}
bytes -= start;
if (bytes == 0) {
return;
}
}
auto const main = (bytes - (bytes % sizeof(value))) / 8;
auto main_ptr = reinterpret_cast<uint64_t*>(start_ptr);
for (auto i = 0UL; i < main; ++i) {
*main_ptr++ = value;
}
bytes -= main * 8;
if (bytes == 0) {
return;
}
auto end_ptr = reinterpret_cast<uint8_t*>(main_ptr);
for (auto i = 0UL; i < bytes; ++i) {
*end_ptr++ = value & 0xff;
value = (value >> 8) | ((value & 0xff) << 56);
}
}
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