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87 lines
2.7 KiB
C++
87 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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/**
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* Sound decoder used in engines:
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* - agos
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* - saga
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* - scumm
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* - tinsel
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*/
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#ifndef SOUND_ADPCM_H
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#define SOUND_ADPCM_H
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#include "common/scummsys.h"
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#include "common/stream.h"
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namespace Audio {
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class AudioStream;
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// There are several types of ADPCM encoding, only some are supported here
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// For all the different encodings, refer to:
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// http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
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// Usually, if the audio stream we're trying to play has the FourCC header
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// string intact, it's easy to discern which encoding is used
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enum typesADPCM {
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kADPCMOki, // Dialogic/Oki ADPCM (aka VOX)
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kADPCMMSIma, // Microsoft IMA ADPCM
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kADPCMMS, // Microsoft ADPCM
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kADPCMTinsel4, // 4-bit ADPCM used by the Tinsel engine
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kADPCMTinsel6, // 6-bit ADPCM used by the Tinsel engine
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kADPCMTinsel8, // 8-bit ADPCM used by the Tinsel engine
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kADPCMIma // Standard IMA ADPCM
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};
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/**
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* Takes an input stream containing ADPCM compressed sound data and creates
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* an AudioStream from that.
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*
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* @param stream the SeekableReadStream from which to read the ADPCM data
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* @param disposeAfterUse whether to delete the stream after use
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* @param size how many bytes to read from the stream (0 = all)
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* @param type the compression type used
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* @param rate the sampling rate (default = 22050)
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* @param channels the number of channels (default = 2)
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* @param blockAlign block alignment ??? (default = 0)
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* @param numLoop how many types the sounds should loop, 0 for infinite loop (default = 1)
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* @return a new AudioStream, or NULL, if an error occured
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*/
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AudioStream *makeADPCMStream(
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Common::SeekableReadStream *stream,
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bool disposeAfterUse,
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uint32 size,
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typesADPCM type,
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int rate = 22050,
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int channels = 2,
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uint32 blockAlign = 0,
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uint numLoops = 1);
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} // End of namespace Audio
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#endif
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