87 lines
2.6 KiB
C++
87 lines
2.6 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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* Additional copyright for this file:
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* Copyright (C) 1999-2000 Revolution Software Ltd.
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* This code is based on source code created by Revolution Software,
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* used with permission.
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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 "engines/icb/p4.h"
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#include "engines/icb/sound/direct_sound.h"
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#include "engines/icb/sound/sound_common.h"
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#include "common/textconsole.h"
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#include "common/stream.h"
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namespace ICB {
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// Common code between the three sound-managers
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bool8 openWav(Common::SeekableReadStream *stream, _wavHeader &header, uint32 &length, uint32 &byteOffsetInCluster, int32 &lengthInCycles) {
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int32 pos = stream->pos();
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int32 bytesRead;
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char buff[1024];
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bool bMore = true;
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// Read the wave header
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if (stream->read(&header, sizeof(_wavHeader)) != sizeof(_wavHeader))
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return FALSE8;
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if (FROM_LE_16(header.formatTag) != 1) {
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warning("Only supports PCM uncompressed wav files");
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return FALSE8;
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}
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// Find the start of the data
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do {
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int32 i = 0;
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bytesRead = stream->read(buff, 256);
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for (i = 0; i < (bytesRead - 3) && bMore; i++)
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bMore = READ_LE_U32(buff + i) != MKTAG('a', 't', 'a', 'd');
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if (bMore)
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stream->seek(-3, SEEK_CUR);
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else
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stream->seek(i - bytesRead + 3, SEEK_CUR);
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} while (bMore && bytesRead == 256);
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if (bMore) // Can't find 'data' !
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return FALSE8;
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// Find length of data
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length = stream->readUint32LE();
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if (stream->err())
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return FALSE8;
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// Adjust this byte counter to represent the first data byte of the wav
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byteOffsetInCluster = (uint32)stream->pos();
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// Expected number of cycles this sample reguires to completely playback
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lengthInCycles = (int32)ceil(((double)length / (double)FROM_LE_32(header.avgBytesPerSec)) * 12.0f * 1.215f);
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stream->seek(pos);
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return TRUE8;
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}
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} // End of namespace ICB
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