add alac source code - part 4 :3

alac/codec/aglib.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2011 Apple Inc. All rights reserved.
+ *
+ * @APPLE_APACHE_LICENSE_HEADER_START@
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * @APPLE_APACHE_LICENSE_HEADER_END@
+ */
+
+/*
+	File:		aglib.h
+	
+	Copyright:	(C) 2001-2011 Apple, Inc.
+*/
+
+#ifndef AGLIB_H
+#define AGLIB_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define QBSHIFT 9
+#define QB (1<<QBSHIFT)
+#define PB0 40
+#define MB0 10
+#define KB0 14
+#define MAX_RUN_DEFAULT 255
+
+#define MMULSHIFT 2
+#define MDENSHIFT (QBSHIFT - MMULSHIFT - 1)
+#define MOFF ((1<<(MDENSHIFT-2)))
+
+#define BITOFF 24
+
+/* Max. prefix of 1's. */
+#define MAX_PREFIX_16			9
+#define MAX_PREFIX_TOLONG_16	15
+#define MAX_PREFIX_32			9
+
+/* Max. bits in 16-bit data type */
+#define MAX_DATATYPE_BITS_16	16
+
+typedef struct AGParamRec
+{
+    uint32_t mb, mb0, pb, kb, wb, qb;
+    uint32_t fw, sw;
+
+    uint32_t maxrun;
+
+    // fw = 1, sw = 1;
+
+} AGParamRec, *AGParamRecPtr;
+
+struct BitBuffer;
+
+void	set_standard_ag_params(AGParamRecPtr params, uint32_t fullwidth, uint32_t sectorwidth);
+void	set_ag_params(AGParamRecPtr params, uint32_t m, uint32_t p, uint32_t k, uint32_t f, uint32_t s, uint32_t maxrun);
+
+int32_t		dyn_comp(AGParamRecPtr params, int32_t * pc, struct BitBuffer * bitstream, int32_t numSamples, int32_t bitSize, uint32_t * outNumBits);
+int32_t		dyn_decomp(AGParamRecPtr params, struct BitBuffer * bitstream, int32_t * pc, int32_t numSamples, int32_t maxSize, uint32_t * outNumBits);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //#ifndef AGLIB_H