Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 118 insertions, 0 deletions

diff --git a/libAACdec/src/rvlc_info.h b/libAACdec/src/rvlc_info.h
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+/****************************************************************************
+
+                     (C) Copyright Fraunhofer IIS (2004)
+                               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.
+
+
+   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.
+
+ $Id$
+
+****************************************************************************/
+/*!
+  \file
+  \brief  Defines structures for RVLC
+  \author Robert Weidner
+*/
+#ifndef RVLC_INFO_H
+#define RVLC_INFO_H
+
+
+
+#define FWD                           0     /* bitstream decoding direction forward (RVL coded part) */
+#define BWD                           1     /* bitstream decoding direction backward (RVL coded part) */
+
+#define MAX_RVL                       7     /* positive RVLC escape */
+#define MIN_RVL                      -7     /* negative RVLC escape */
+#define MAX_ALLOWED_DPCM_INDEX       14     /* the maximum allowed index of a decoded dpcm value (offset 'TABLE_OFFSET' incl --> must be subtracted) */
+#define TABLE_OFFSET                  7     /* dpcm offset of valid output values of rvl table decoding, the rvl table ouly returns positive values, therefore the offset */
+#define MAX_LEN_RVLC_CODE_WORD        9     /* max length of a RVL codeword in bits */
+#define MAX_LEN_RVLC_ESCAPE_WORD     20     /* max length of huffman coded RVLC escape word in bits */
+
+#define DPCM_NOISE_NRG_BITS           9
+#define SF_OFFSET                   100     /* offset for correcting scf value */
+
+#define CONCEAL_MAX_INIT           1311     /* arbitrary value */
+#define CONCEAL_MIN_INIT          -1311     /* arbitrary value */
+
+#define RVLC_MAX_SFB              ((8) * (16))
+
+/* sideinfo of RVLC */
+typedef struct
+{
+  /* ------- ESC 1 Data: --------- */     /* order of RVLC-bitstream components in bitstream (RVLC-initialization), every component appears only once in bitstream */
+  INT        sf_concealment;              /* 1          */
+  INT        rev_global_gain;             /* 2          */
+  SHORT      length_of_rvlc_sf;           /* 3          */  /* original value, gets modified (subtract 9) in case of noise (PNS); is kept for later use */
+  INT        dpcm_noise_nrg;              /* 4 optional */
+  INT        sf_escapes_present;          /* 5          */
+  SHORT      length_of_rvlc_escapes;      /* 6 optional */
+  INT        dpcm_noise_last_position;    /* 7 optional */
+
+  INT        dpcm_is_last_position;
+
+  SHORT      length_of_rvlc_sf_fwd;       /* length_of_rvlc_sf used for forward decoding */
+  SHORT      length_of_rvlc_sf_bwd;       /* length_of_rvlc_sf used for backward decoding */
+
+  /* for RVL-Codeword decoder to distinguish between fwd and bwd decoding */
+  SHORT     *pRvlBitCnt_RVL;
+  USHORT    *pBitstrIndxRvl_RVL;
+
+  UCHAR      numWindowGroups;
+  UCHAR      maxSfbTransmitted;
+  UCHAR      first_noise_group;
+  UCHAR      first_noise_band;
+  UCHAR      direction;
+
+  /* bitstream indices */
+  USHORT     bitstreamIndexRvlFwd;        /* base address of RVL-coded-scalefactor data (ESC 2) for forward  decoding */
+  USHORT     bitstreamIndexRvlBwd;        /* base address of RVL-coded-scalefactor data (ESC 2) for backward decoding */
+  USHORT     bitstreamIndexEsc;           /* base address where RVLC-escapes start (ESC 2) */
+
+  /* decoding trees */
+  const UINT *pHuffTreeRvlCodewds;
+  const UINT *pHuffTreeRvlcEscape;
+
+  /* escape counters */
+  UCHAR      numDecodedEscapeWordsFwd;    /* when decoding RVL-codes forward  */
+  UCHAR      numDecodedEscapeWordsBwd;    /* when decoding RVL-codes backward */
+  UCHAR      numDecodedEscapeWordsEsc;    /* when decoding the escape-Words */
+
+  SCHAR      noise_used;
+  SCHAR      intensity_used;
+  SCHAR      sf_used;
+
+  SHORT      firstScf;
+  SHORT      lastScf;
+  SHORT      firstNrg;
+  SHORT      lastNrg;
+  SHORT      firstIs;
+  SHORT      lastIs;
+
+  /* ------ RVLC error detection ------ */
+  UINT       errorLogRvlc;                /* store RVLC errors  */
+  SHORT      conceal_min;                 /* is set at backward decoding  */
+  SHORT      conceal_max;                 /* is set at forward  decoding  */
+  SHORT      conceal_min_esc;             /* is set at backward decoding  */
+  SHORT      conceal_max_esc;             /* is set at forward  decoding  */
+} CErRvlcInfo;
+
+typedef CErRvlcInfo RVLC_INFO; /* temp */
+
+
+
+#endif /* RVLC_INFO_H */