99 lines
2.2 KiB
C++
99 lines
2.2 KiB
C++
/*
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* Copyright 2003-2020 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 "DecoderAPI.hxx"
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#include "input/InputStream.hxx"
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#include "Log.hxx"
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#include <cassert>
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size_t
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decoder_read(DecoderClient *client,
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InputStream &is,
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void *buffer, size_t length) noexcept
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{
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assert(buffer != nullptr);
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/* XXX don't allow client==nullptr */
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if (client != nullptr)
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return client->Read(is, buffer, length);
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try {
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return is.LockRead(buffer, length);
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} catch (...) {
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LogError(std::current_exception());
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return 0;
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}
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}
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size_t
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decoder_read_much(DecoderClient *client, InputStream &is,
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void *_buffer, size_t size) noexcept
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{
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auto buffer = (uint8_t *)_buffer;
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size_t total = 0;
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while (size > 0 && !is.LockIsEOF()) {
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size_t nbytes = decoder_read(client, is, buffer, size);
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if (nbytes == 0)
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return false;
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total += nbytes;
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buffer += nbytes;
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size -= nbytes;
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}
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return total;
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}
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bool
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decoder_read_full(DecoderClient *client, InputStream &is,
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void *_buffer, size_t size) noexcept
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{
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auto buffer = (uint8_t *)_buffer;
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while (size > 0) {
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size_t nbytes = decoder_read(client, is, buffer, size);
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if (nbytes == 0)
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return false;
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buffer += nbytes;
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size -= nbytes;
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}
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return true;
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}
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bool
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decoder_skip(DecoderClient *client, InputStream &is, size_t size) noexcept
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{
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while (size > 0) {
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char buffer[1024];
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size_t nbytes = decoder_read(client, is, buffer,
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std::min(sizeof(buffer), size));
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if (nbytes == 0)
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return false;
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size -= nbytes;
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}
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return true;
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}
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