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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.
*
* $URL$
* $Id$
*
*/
/**
* @file
* Sound decoder used in engines:
* - agos
* - saga
* - scumm
* - tinsel
*/
#ifndef SOUND_ADPCM_H
#define SOUND_ADPCM_H
#include "common/scummsys.h"
#include "common/stream.h"
namespace Audio {
class AudioStream;
class RewindableAudioStream;
// There are several types of ADPCM encoding, only some are supported here
// For all the different encodings, refer to:
// http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
// Usually, if the audio stream we're trying to play has the FourCC header
// string intact, it's easy to discern which encoding is used
enum typesADPCM {
kADPCMOki, // Dialogic/Oki ADPCM (aka VOX)
kADPCMMSIma, // Microsoft IMA ADPCM
kADPCMMSImaLastExpress, // Microsoft IMA ADPCM (with inverted samples)
kADPCMMS, // Microsoft ADPCM
kADPCMTinsel4, // 4-bit ADPCM used by the Tinsel engine
kADPCMTinsel6, // 6-bit ADPCM used by the Tinsel engine
kADPCMTinsel8, // 8-bit ADPCM used by the Tinsel engine
kADPCMIma, // Standard IMA ADPCM
kADPCMApple // Apple QuickTime IMA ADPCM
};
/**
* Takes an input stream containing ADPCM compressed sound data and creates
* an RewindableAudioStream from that.
*
* @param stream the SeekableReadStream from which to read the ADPCM data
* @param disposeAfterUse whether to delete the stream after use
* @param size how many bytes to read from the stream (0 = all)
* @param type the compression type used
* @param rate the sampling rate
* @param channels the number of channels
* @param blockAlign block alignment ???
* @return a new RewindableAudioStream, or NULL, if an error occurred
*/
RewindableAudioStream *makeADPCMStream(
Common::SeekableReadStream *stream,
DisposeAfterUse::Flag disposeAfterUse,
uint32 size, typesADPCM type,
int rate = 22050,
int channels = 2,
uint32 blockAlign = 0);
} // End of namespace Audio
#endif
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