53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
/*
|
|
* Copyright 2003-2021 The Music Player Daemon Project
|
|
* http://www.musicpd.org
|
|
*
|
|
* This program 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.
|
|
*
|
|
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "ReadFrames.hxx"
|
|
#include "system/Error.hxx"
|
|
#include "io/FileDescriptor.hxx"
|
|
|
|
static size_t
|
|
ReadOrThrow(FileDescriptor fd, void *buffer, size_t size)
|
|
{
|
|
auto nbytes = fd.Read(buffer, size);
|
|
if (nbytes < 0)
|
|
throw MakeErrno("Read failed");
|
|
|
|
return nbytes;
|
|
}
|
|
|
|
std::size_t
|
|
ReadFrames(FileDescriptor fd, void *_buffer, std::size_t size,
|
|
std::size_t frame_size)
|
|
{
|
|
auto buffer = (std::byte *)_buffer;
|
|
|
|
size = (size / frame_size) * frame_size;
|
|
|
|
size_t nbytes = ReadOrThrow(fd, buffer, size);
|
|
|
|
const size_t modulo = nbytes % frame_size;
|
|
if (modulo > 0) {
|
|
size_t rest = frame_size - modulo;
|
|
fd.FullRead(buffer + nbytes, rest);
|
|
nbytes += rest;
|
|
}
|
|
|
|
return nbytes;
|
|
}
|