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93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "glk/magnetic/magnetic.h"
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namespace Glk {
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namespace Magnetic {
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byte Magnetic::init_snd(size_t size) {
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if (!(snd_buf = new byte[MAX_MUSIC_SIZE])) {
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return 1;
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}
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snd_hsize = _sndFile.readUint16LE();
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if (!(snd_hdr = new byte[snd_hsize])) {
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delete[] snd_buf;
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snd_buf = nullptr;
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return 1;
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}
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if (_sndFile.read(snd_hdr, snd_hsize) != snd_hsize) {
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delete[] snd_buf;
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delete[] snd_hdr;
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snd_buf = nullptr;
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snd_hdr = nullptr;
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return 1;
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}
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return 2;
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}
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int16 Magnetic::find_name_in_sndheader(const Common::String &name) {
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int16 header_pos = 0;
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while (header_pos < snd_hsize) {
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const char *hname = (const char *)(snd_hdr + header_pos);
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if (name == hname)
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return header_pos;
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header_pos += 18;
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}
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return -1;
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}
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byte *Magnetic::sound_extract(const Common::String &name, uint32 *length, uint16 *tempo) {
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uint32 offset = 0;
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int16 header_pos = -1;
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if (header_pos < 0)
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header_pos = find_name_in_sndheader(name);
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if (header_pos < 0)
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return 0;
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*tempo = READ_BE_UINT16(snd_hdr + header_pos + 8);
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offset = READ_BE_UINT32(snd_hdr + header_pos + 10);
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*length = READ_BE_UINT32(snd_hdr + header_pos + 14);
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if (offset != 0) {
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if (!snd_buf)
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return nullptr;
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if (!_sndFile.seek(offset))
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return nullptr;
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if (_sndFile.read(snd_buf, *length) != *length)
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return nullptr;
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return snd_buf;
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}
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return nullptr;
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}
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} // End of namespace Magnetic
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} // End of namespace Glk
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