Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 91 insertions, 0 deletions

diff --git a/libAACdec/src/aacdec_hcrs.h b/libAACdec/src/aacdec_hcrs.h
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+/*****************************  MPEG-4 AAC Decoder  ***************************
+
+                      (C) Copyright Fraunhofer IIS 2000-2008
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):   Robert Weidner (DSP Solutions)
+   Description: HCR Decoder: Defines of state-constants, masks and
+                state-prototypes
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+*******************************************************************************/
+
+#ifndef _AACDEC_HCRS_H_
+#define _AACDEC_HCRS_H_
+
+
+
+#include "FDK_bitstream.h"
+#include "aacdec_hcr_types.h"
+                                                    /* The four different kinds of types of states are:                     */
+/* different states are defined as constants */     /* start   middle=self   next   stop                                    */
+#define  STOP_THIS_STATE             0              /*                                                                      */
+#define  BODY_ONLY                   1              /*   X          X                X                                      */
+#define  BODY_SIGN__BODY             2              /*   X          X         X      X [stop if no sign]                    */
+#define  BODY_SIGN__SIGN             3              /*              X                X [stop if sign bits decoded]          */
+#define  BODY_SIGN_ESC__BODY         4              /*   X          X         X      X [stop if no sign]                    */
+#define  BODY_SIGN_ESC__SIGN         5              /*              X         X      X [stop if no escape sequence]         */
+#define  BODY_SIGN_ESC__ESC_PREFIX   6              /*              X         X                                             */
+#define  BODY_SIGN_ESC__ESC_WORD     7              /*              X         X      X [stop if abs(second qsc) != 16]      */
+
+/* examples: */
+
+/* BODY_ONLY                    means only the codeword body will be decoded; no sign bits will follow and no escapesequence will follow */
+
+/* BODY_SIGN__BODY              means that the codeword consists of two parts; body and sign part. The part '__BODY' after the two underscores shows */
+/*                              that the bits which are currently decoded belong to the '__BODY' of the codeword and not to the sign part. */
+
+/* BODY_SIGN_ESC__ESC_PB        means that the codeword consists of three parts; body, sign and (here: two) escape sequences;  */
+/*                              P = Prefix = ones */
+/*                              W = Escape Word */
+/*                              A = first possible (of two) Escape sequeces */
+/*                              B = second possible (of two) Escape sequeces */
+/*                              The part after the two underscores shows that the current bits which are decoded belong to the '__ESC_PB' - part of the */
+/*                              codeword. That means the body and the sign bits are decoded completely and the bits which are decoded now belong to */
+/*                              the escape sequence [P = prefix; B=second possible escape sequence] */
+
+
+#define   MSB_31_MASK                       0x80000000              /* masks MSB (= Bit 31) in a 32 bit word */
+#define   DIMENSION_OF_ESCAPE_CODEBOOK      2                       /* for cb >= 11 is dimension 2 */
+#define   ESCAPE_CODEBOOK                   11
+
+#define   MASK_ESCAPE_PREFIX_UP             0x000F0000
+#define   LSB_ESCAPE_PREFIX_UP              16
+
+#define   MASK_ESCAPE_PREFIX_DOWN           0x0000F000
+#define   LSB_ESCAPE_PREFIX_DOWN            12
+
+#define   MASK_ESCAPE_WORD                  0x00000FFF
+#define   MASK_FLAG_A                       0x00200000
+#define   MASK_FLAG_B                       0x00100000
+
+
+extern void DecodeNonPCWs(HANDLE_FDK_BITSTREAM bs, H_HCR_INFO hHcr);
+
+UINT Hcr_State_BODY_ONLY                 (HANDLE_FDK_BITSTREAM, void*);
+UINT Hcr_State_BODY_SIGN__BODY           (HANDLE_FDK_BITSTREAM, void*);
+UINT Hcr_State_BODY_SIGN__SIGN           (HANDLE_FDK_BITSTREAM, void*);
+UINT Hcr_State_BODY_SIGN_ESC__BODY       (HANDLE_FDK_BITSTREAM, void*);
+UINT Hcr_State_BODY_SIGN_ESC__SIGN       (HANDLE_FDK_BITSTREAM, void*);
+UINT Hcr_State_BODY_SIGN_ESC__ESC_PREFIX (HANDLE_FDK_BITSTREAM, void*);
+UINT Hcr_State_BODY_SIGN_ESC__ESC_WORD   (HANDLE_FDK_BITSTREAM, void*);
+
+#endif /* _AACDEC_HCRS_H_ */
+