72 lines
1.6 KiB
C++
72 lines
1.6 KiB
C++
/*
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* Copyright (C) 2003-2014 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 "config.h"
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#include "DecoderBuffer.hxx"
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#include "DecoderAPI.hxx"
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#include <assert.h>
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bool
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DecoderBuffer::Fill()
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{
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auto w = buffer.Write();
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if (w.IsEmpty())
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/* buffer is full */
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return false;
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size_t nbytes = decoder_read(decoder, is,
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w.data, w.size);
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if (nbytes == 0)
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/* end of file, I/O error or decoder command
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received */
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return false;
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buffer.Append(nbytes);
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return true;
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}
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ConstBuffer<void>
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DecoderBuffer::Need(size_t min_size)
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{
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while (true) {
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const auto r = Read();
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if (r.size >= min_size)
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return r;
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if (!Fill())
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return nullptr;
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}
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}
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bool
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DecoderBuffer::Skip(size_t nbytes)
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{
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const auto r = buffer.Read();
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if (r.size >= nbytes) {
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buffer.Consume(nbytes);
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return true;
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}
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buffer.Clear();
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nbytes -= r.size;
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return decoder_skip(decoder, is, nbytes);
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}
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