Moved audio stream implementations (for MP3, FLAC, etc.) to new dir sound/decoders/

svn-id: r47579

1 files changed, 86 insertions, 0 deletions

diff --git a/sound/decoders/adpcm.h b/sound/decoders/adpcm.h
new file mode 100644
index 0000000000..46ccb582c3
--- /dev/null
+++ b/sound/decoders/adpcm.h
@@ -0,0 +1,86 @@
+/* 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
+	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 occured
+ */
+RewindableAudioStream *makeADPCMStream(
+    Common::SeekableReadStream *stream,
+    bool disposeAfterUse,
+    uint32 size, typesADPCM type,
+    int rate = 22050,
+    int channels = 2,
+    uint32 blockAlign = 0);
+
+} // End of namespace Audio
+
+#endif