53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
/*
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* Copyright 2003-2022 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "ReadFrames.hxx"
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#include "system/Error.hxx"
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#include "io/FileDescriptor.hxx"
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static size_t
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ReadOrThrow(FileDescriptor fd, void *buffer, size_t size)
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{
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auto nbytes = fd.Read(buffer, size);
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if (nbytes < 0)
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throw MakeErrno("Read failed");
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return nbytes;
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}
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std::size_t
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ReadFrames(FileDescriptor fd, void *_buffer, std::size_t size,
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std::size_t frame_size)
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{
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auto buffer = (std::byte *)_buffer;
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size = (size / frame_size) * frame_size;
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size_t nbytes = ReadOrThrow(fd, buffer, size);
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const size_t modulo = nbytes % frame_size;
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if (modulo > 0) {
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size_t rest = frame_size - modulo;
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fd.FullRead(buffer + nbytes, rest);
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nbytes += rest;
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}
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return nbytes;
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}
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