100 lines
2.3 KiB
C++
100 lines
2.3 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 "IcyInputStream.hxx"
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#include "tag/Tag.hxx"
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IcyInputStream::IcyInputStream(InputStream *_input)
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:ProxyInputStream(_input),
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input_tag(nullptr), icy_tag(nullptr),
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override_offset(0)
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{
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}
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IcyInputStream::~IcyInputStream()
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{
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delete input_tag;
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delete icy_tag;
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}
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void
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IcyInputStream::Update()
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{
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ProxyInputStream::Update();
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if (IsEnabled())
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offset = override_offset;
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}
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Tag *
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IcyInputStream::ReadTag()
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{
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Tag *new_input_tag = ProxyInputStream::ReadTag();
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if (!IsEnabled())
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return new_input_tag;
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if (new_input_tag != nullptr) {
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delete input_tag;
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input_tag = new_input_tag;
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}
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Tag *new_icy_tag = parser.ReadTag();
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if (new_icy_tag != nullptr) {
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delete icy_tag;
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icy_tag = new_icy_tag;
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}
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if (new_input_tag == nullptr && new_icy_tag == nullptr)
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/* no change */
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return nullptr;
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if (input_tag == nullptr && icy_tag == nullptr)
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/* no tag */
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return nullptr;
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if (input_tag == nullptr)
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return new Tag(*icy_tag);
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if (icy_tag == nullptr)
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return new Tag(*input_tag);
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return Tag::Merge(*input_tag, *icy_tag);
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}
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size_t
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IcyInputStream::Read(void *ptr, size_t read_size, Error &error)
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{
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if (!IsEnabled())
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return ProxyInputStream::Read(ptr, read_size, error);
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while (true) {
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size_t nbytes = ProxyInputStream::Read(ptr, read_size, error);
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if (nbytes == 0)
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return 0;
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size_t result = parser.ParseInPlace(ptr, nbytes);
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if (result > 0) {
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override_offset += result;
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offset = override_offset;
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return result;
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}
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}
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}
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