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

svn-id: r47579

1 files changed, 134 insertions, 0 deletions

diff --git a/sound/decoders/raw.h b/sound/decoders/raw.h
new file mode 100644
index 0000000000..16ab4ec350
--- /dev/null
+++ b/sound/decoders/raw.h
@@ -0,0 +1,134 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef SOUND_RAW_H
+#define SOUND_RAW_H
+
+#include "common/scummsys.h"
+#include "common/types.h"
+
+
+namespace Common { class SeekableReadStream; }
+
+
+namespace Audio {
+
+class AudioStream;
+class SeekableAudioStream;
+
+/**
+ * Various flags which can be bit-ORed and then passed to
+ * makeRawMemoryStream and some other AudioStream factories
+ * to control their behavior.
+ *
+ * Engine authors are advised not to rely on a certain value or
+ * order of these flags (in particular, do not store them verbatim
+ * in savestates).
+ */
+enum RawFlags {
+	/** unsigned samples (default: signed) */
+	FLAG_UNSIGNED = 1 << 0,
+
+	/** sound is 16 bits wide (default: 8bit) */
+	FLAG_16BITS = 1 << 1,
+
+	/** samples are little endian (default: big endian) */
+	FLAG_LITTLE_ENDIAN = 1 << 2,
+
+	/** sound is in stereo (default: mono) */
+	FLAG_STEREO = 1 << 3
+};
+
+
+/**
+ * Creates a audio stream, which plays the given raw data.
+ *
+ * The data pointer is assumed to have been allocated with malloc().
+ * In particular, if autofreeBuffer is set to DisposeAfterUse::YES,
+ * then this buffer will be deallocated using free(). So do not
+ * use a buffer allocated with new[]!
+ *
+ * @param ptr 	pointer to a buffer containing audio data
+ * @param len	length of the buffer in bytes
+ * @param rate	sample rate of the data
+ * @param flags	audio format flags combination
+ * @see Mixer::RawFlags
+ * @param autofreeBuffer	whether the data buffer should be destroyed after playback
+ * @return The new SeekableAudioStream (or 0 on failure).
+ */
+SeekableAudioStream *makeRawMemoryStream(const byte *ptr, uint32 len,
+		int rate, byte flags,
+		DisposeAfterUse::Flag autofreeBuffer = DisposeAfterUse::YES
+		);
+
+/**
+ * NOTE:
+ * This API is considered deprecated.
+ *
+ * Factory function for a raw PCM AudioStream, which will simply treat all
+ * data in the buffer described by ptr and len as raw sample data in the
+ * specified format. It will then simply pass this data directly to the mixer,
+ * after converting it to the sample format used by the mixer (i.e. 16 bit
+ * signed native endian). Optionally supports (infinite) looping of a portion
+ * of the data.
+ */
+AudioStream *makeRawMemoryStream_OLD(const byte *ptr, uint32 len,
+		int rate, byte flags,
+		uint loopStart, uint loopEnd,
+		DisposeAfterUse::Flag autofreeBuffer = DisposeAfterUse::YES
+		);
+
+
+/**
+ * Struct used to define the audio data to be played by a RawDiskStream.
+ */
+struct RawDiskStreamAudioBlock {
+	int32 pos;		///< Position in stream of the block
+	int32 len;		///< Length of the block (in samples)
+};
+
+/**
+ * Creates a audio stream, which plays from given stream.
+ *
+ * @param stream Stream to play from
+ * @param block Pointer to an RawDiskStreamAudioBlock array
+ * @see RawDiskStreamAudioBlock
+ * @param numBlocks Number of blocks.
+ * @param rate The rate
+ * @param len Length of the data (in bytes!)
+ * @param flags Flags combination.
+ * @see Mixer::RawFlags
+ * @param disposeStream Whether the "stream" object should be destroyed after playback.
+ * @return The new SeekableAudioStream (or 0 on failure).
+ */
+SeekableAudioStream *makeRawDiskStream(Common::SeekableReadStream *stream,
+		RawDiskStreamAudioBlock *block, int numBlocks,
+		int rate, byte flags,
+		DisposeAfterUse::Flag disposeStream);
+
+
+} // End of namespace Audio
+
+#endif