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37 lines
784 B
C++
37 lines
784 B
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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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, std::span<std::byte> dest)
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{
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auto nbytes = fd.Read(dest);
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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({(std::byte *)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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