adpcm.h

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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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */
 
#ifndef AUDIO_ADPCM_H
#define AUDIO_ADPCM_H
 
#include "common/scummsys.h"
#include "common/types.h"
 
namespace Common {
class SeekableReadStream;
}
 
 
namespace Audio {
 
class PacketizedAudioStream;
class SeekableAudioStream;
 
// There are several types of ADPCM encoding, only some are supported here
// For all the different encodings, refer to:
// https://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 ADPCMType {
    kADPCMOki,                 // Dialogic/Oki ADPCM (aka VOX)
    kADPCMMSIma,               // Microsoft IMA ADPCM
    kADPCMMS,                  // Microsoft ADPCM
    kADPCMDVI,                 // Intel DVI IMA ADPCM
    kADPCMApple,               // Apple QuickTime IMA ADPCM
    kADPCMDK3,                 // Duck DK3 IMA ADPCM
    kADPCMXA,                  // XA ADPCM
    kADPCM4XM                  // 4XM ADPCM
};
 
SeekableAudioStream *makeADPCMStream(
    Common::SeekableReadStream *stream,
    DisposeAfterUse::Flag disposeAfterUse,
    uint32 size, ADPCMType type,
    int rate,
    int channels,
    uint32 blockAlign = 0);
 
PacketizedAudioStream *makePacketizedADPCMStream(
    ADPCMType type,
    int rate,
    int channels,
    uint32 blockAlign = 0);
 
} // End of namespace Audio
 
#endif