81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
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/*
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* Copyright 2003-2019 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 "Id3Picture.hxx"
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#include "Handler.hxx"
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#include "util/ByteOrder.hxx"
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#include "util/ConstBuffer.hxx"
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#include "util/StringView.hxx"
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#include <string>
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#include <stdint.h>
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static StringView
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ReadString(ConstBuffer<uint8_t> &src) noexcept
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{
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if (src.size < 4)
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return nullptr;
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const size_t length = FromBE32(*(const uint32_t *)src.data);
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src.skip_front(4);
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if (src.size < length)
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return nullptr;
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StringView result((const char *)src.data, length);
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src.skip_front(length);
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return result;
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}
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void
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ScanId3Apic(ConstBuffer<void> _buffer, TagHandler &handler) noexcept
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{
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auto buffer = ConstBuffer<uint8_t>::FromVoid(_buffer);
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if (buffer.size < 4)
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return;
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buffer.skip_front(4); /* picture type */
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const auto mime_type = ReadString(buffer);
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if (mime_type.IsNull())
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return;
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/* description */
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if (ReadString(buffer).IsNull())
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return;
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if (buffer.size < 20)
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return;
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buffer.skip_front(16);
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const size_t image_size = FromBE32(*(const uint32_t *)buffer.data);
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buffer.skip_front(4);
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if (buffer.size < image_size)
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return;
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ConstBuffer<void> image(buffer.data, image_size);
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// TODO: don't copy MIME type, pass StringView to TagHandler::OnPicture()
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handler.OnPicture(std::string(mime_type.data, mime_type.size).c_str(),
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image);
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}
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