64 lines
1.9 KiB
C++
64 lines
1.9 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 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 3 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "chewy/audio/chewy_voc.h"
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#include "common/stream.h"
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namespace Chewy {
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ChewyVocStream::ChewyVocStream(Common::SeekableReadStream* stream, DisposeAfterUse::Flag disposeAfterUse) :
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VocStream(stream, true, disposeAfterUse) {
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removeHeaders();
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}
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void ChewyVocStream::removeHeaders() {
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// Check the sample blocks for non-standard headers.
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for (auto &block : _blocks) {
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if (block.code == 1 && block.sampleBlock.samples > 80) {
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// Found a sample block. Check for the headers.
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int headerSize = 0;
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if (_stream->readUint32BE() == FOURCC_RIFF) {
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// Found a RIFF header.
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headerSize = 44;
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} else {
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_stream->seek(block.sampleBlock.offset + 76);
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if (_stream->readUint32BE() == FOURCC_SCRS) {
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// Found an SCRS (?) header.
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headerSize = 80;
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}
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}
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if (headerSize > 0) {
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// Move the offset past the header and adjust the length.
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block.sampleBlock.offset += headerSize;
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block.sampleBlock.samples -= headerSize;
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_length = _length.addFrames(-headerSize);
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}
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}
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}
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// Reset the stream.
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rewind();
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}
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} // End of namespace Chewy
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