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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/textconsole.h"
#include "scumm/smush/channel.h"
namespace Scumm {
SmushChannel::SmushChannel(int32 track) :
_track(track),
_tbuffer(0),
_tbufferSize(0),
_sbuffer(0),
_sbufferSize(0),
_dataSize(-1),
_inData(false),
_volume(0),
_pan(0) {
}
SmushChannel::~SmushChannel() {
free(_tbuffer);
free(_sbuffer);
}
void SmushChannel::processBuffer() {
assert(_tbuffer != 0);
assert(_tbufferSize != 0);
assert(_sbuffer == 0);
assert(_sbufferSize == 0);
if (_inData) {
if (_dataSize < _tbufferSize) {
int32 offset = _dataSize;
while (handleSubTags(offset))
;
_sbufferSize = _dataSize;
_sbuffer = _tbuffer;
if (offset < _tbufferSize) {
int new_size = _tbufferSize - offset;
_tbuffer = (byte *)malloc(new_size);
// FIXME: _tbuffer might be 0 if new_size is 0.
// NB: Also check other "if (_tbuffer)" locations in smush
if (!_tbuffer)
error("smush channel failed to allocate memory");
memcpy(_tbuffer, _sbuffer + offset, new_size);
_tbufferSize = new_size;
} else {
_tbuffer = 0;
_tbufferSize = 0;
}
if (_sbufferSize == 0) {
free(_sbuffer);
_sbuffer = 0;
}
} else {
_sbufferSize = _tbufferSize;
_sbuffer = _tbuffer;
_tbufferSize = 0;
_tbuffer = 0;
}
} else {
int32 offset = 0;
while (handleSubTags(offset))
;
if (_inData) {
_sbufferSize = _tbufferSize - offset;
assert(_sbufferSize);
_sbuffer = (byte *)malloc(_sbufferSize);
if (!_sbuffer)
error("smush channel failed to allocate memory");
memcpy(_sbuffer, _tbuffer + offset, _sbufferSize);
free(_tbuffer);
_tbuffer = 0;
_tbufferSize = 0;
} else {
if (offset) {
byte *old = _tbuffer;
int32 new_size = _tbufferSize - offset;
_tbuffer = (byte *)malloc(new_size);
// NB: Also check other "if (_tbuffer)" locations in smush
if (!_tbuffer) {
if (new_size)
error("smush channel failed to allocate memory");
} else {
memcpy(_tbuffer, old + offset, new_size);
}
_tbufferSize = new_size;
free(old);
}
}
}
}
} // End of namespace Scumm
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