mirror of
https://github.com/libretro/scummvm.git
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113 lines
2.7 KiB
C++
113 lines
2.7 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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* 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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* 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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* $URL$
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* $Id$
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*
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*/
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#include "scumm/smush/channel.h"
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namespace Scumm {
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SmushChannel::SmushChannel(int32 track) :
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_track(track),
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_tbuffer(0),
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_tbufferSize(0),
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_sbuffer(0),
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_sbufferSize(0),
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_dataSize(-1),
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_inData(false),
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_volume(0),
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_pan(0) {
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}
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SmushChannel::~SmushChannel() {
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delete[] _tbuffer;
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delete[] _sbuffer;
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}
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void SmushChannel::processBuffer() {
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assert(_tbuffer != 0);
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assert(_tbufferSize != 0);
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assert(_sbuffer == 0);
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assert(_sbufferSize == 0);
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if (_inData) {
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if (_dataSize < _tbufferSize) {
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int32 offset = _dataSize;
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while (handleSubTags(offset))
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;
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_sbufferSize = _dataSize;
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_sbuffer = _tbuffer;
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if (offset < _tbufferSize) {
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int new_size = _tbufferSize - offset;
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_tbuffer = new byte[new_size];
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if (!_tbuffer)
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error("smush channel failed to allocate memory");
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memcpy(_tbuffer, _sbuffer + offset, new_size);
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_tbufferSize = new_size;
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} else {
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_tbuffer = 0;
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_tbufferSize = 0;
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}
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if (_sbufferSize == 0) {
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delete[] _sbuffer;
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_sbuffer = 0;
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}
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} else {
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_sbufferSize = _tbufferSize;
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_sbuffer = _tbuffer;
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_tbufferSize = 0;
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_tbuffer = 0;
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}
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} else {
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int32 offset = 0;
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while (handleSubTags(offset))
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;
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if (_inData) {
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_sbufferSize = _tbufferSize - offset;
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assert(_sbufferSize);
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_sbuffer = new byte[_sbufferSize];
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if (!_sbuffer)
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error("smush channel failed to allocate memory");
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memcpy(_sbuffer, _tbuffer + offset, _sbufferSize);
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delete[] _tbuffer;
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_tbuffer = 0;
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_tbufferSize = 0;
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} else {
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if (offset) {
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byte *old = _tbuffer;
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int32 new_size = _tbufferSize - offset;
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_tbuffer = new byte[new_size];
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if (!_tbuffer)
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error("smush channel failed to allocate memory");
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memcpy(_tbuffer, old + offset, new_size);
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_tbufferSize = new_size;
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delete[] old;
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}
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}
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}
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}
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} // End of namespace Scumm
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