coder.h

从FFMPEG转换而来的H264解码程序,VC下编译..

/* ***** BEGIN LICENSE BLOCK *****
 *
 * Portions Copyright (c) 1995-2005 RealNetworks, Inc. All Rights Reserved.
 *
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
 * RealNetworks.  You may not use this file except in compliance with
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable
 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 *
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 *
 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
 * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
 * ENJOYMENT OR NON-INFRINGEMENT.
 *
 * Technology Compatibility Kit Test Suite(s) Location:
 *    http://www.helixcommunity.org/content/tck
 *
 * Contributor(s):
 *
 * ***** END LICENSE BLOCK ***** */

/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker ([e-mail])
 * February 2005
 *
 * coder.h - definitions of platform-specific data structures, functions, and tables
 **************************************************************************************/

#ifndef _CODER_H
#define _CODER_H

#include "aaccommon.h"
#include "bitstream.h"

#ifndef ASSERT
#if defined(_WIN32) && defined(_M_IX86) && (defined (_DEBUG) || defined (REL_ENABLE_ASSERTS))
#define ASSERT(x) if (!(x)) __asm int 3;
#else
#define ASSERT(x) /* do nothing */
#endif
#endif

#ifndef MAX
#define MAX(a,b)        ((a) > (b) ? (a) : (b))
#endif

#ifndef MIN
#define MIN(a,b)        ((a) < (b) ? (a) : (b))
#endif

#define NWINDOWS_LONG           1
#define NWINDOWS_SHORT          8

#define DATA_BUF_SIZE           510             /* max count = 255 + 255 */
#define FILL_BUF_SIZE           269             /* max count = 15 + 255 - 1*/
#define ADIF_COPYID_SIZE        9
#define MAX_COMMENT_BYTES       255

#define MAX_NUM_FCE                     15
#define MAX_NUM_SCE                     15
#define MAX_NUM_BCE                     15
#define MAX_NUM_LCE                      3
#define MAX_NUM_ADE                      7
#define MAX_NUM_CCE                     15

#define CHAN_ELEM_IS_CPE(x)             (((x) & 0x10) >> 4)  /* bit 4 = SCE/CPE flag */
#define CHAN_ELEM_GET_TAG(x)    (((x) & 0x0f) >> 0)  /* bits 3-0 = instance tag */

#define CHAN_ELEM_SET_CPE(x)    (((x) & 0x01) << 4)  /* bit 4 = SCE/CPE flag */
#define CHAN_ELEM_SET_TAG(x)    (((x) & 0x0f) << 0)  /* bits 3-0 = instance tag */

#define MAX_HUFF_BITS                   20
#define HUFFTAB_SPEC_OFFSET             1

/* do y <<= n, clipping to range [-2^30, 2^30 - 1] (i.e. output has one guard bit) */
#define CLIP_2N_SHIFT(y, n) {                   \
        int sign = (y) >> 31;                   \
        if (sign != (y) >> (30 - (n)))  {       \
            (y) = sign ^ (0x3fffffff);          \
        } else {                                \
            (y) = (y) << (n);                   \
        }                                       \
    }

/* clip to [-2^n, 2^n-1], valid range of n = [1, 30] */
#define CLIP_2N(val, n) {                               \
        if ((val) >> 31 != (val) >> (n))                \
            (val) = ((val) >> 31) ^ ((1 << (n)) - 1);   \
    }

#define SF_DQ_OFFSET            15
#define FBITS_OUT_DQ            20
#define FBITS_OUT_DQ_OFF        (FBITS_OUT_DQ - SF_DQ_OFFSET)   /* number of fraction bits out of dequant, including 2^15 bias */

#define FBITS_IN_IMDCT          FBITS_OUT_DQ_OFF        /* number of fraction bits into IMDCT */
#define GBITS_IN_DCT4           4                                       /* min guard bits in for DCT4 */

#define FBITS_LOST_DCT4         1               /* number of fraction bits lost (>> out) in DCT-IV */
#define FBITS_LOST_WND          1               /* number of fraction bits lost (>> out) in synthesis window (neg = gain frac bits) */
#define FBITS_LOST_IMDCT        (FBITS_LOST_DCT4 + FBITS_LOST_WND)
#define FBITS_OUT_IMDCT         (FBITS_IN_IMDCT - FBITS_LOST_IMDCT)

#define NUM_IMDCT_SIZES         2

/* additional external symbols to name-mangle for static linking */
#define DecodeProgramConfigElement              STATNAME(DecodeProgramConfigElement)
#define DecodeHuffmanScalar                             STATNAME(DecodeHuffmanScalar)
#define DecodeSpectrumLong                              STATNAME(DecodeSpectrumLong)
#define DecodeSpectrumShort                             STATNAME(DecodeSpectrumShort)
#define DecodeICSInfo                                   STATNAME(DecodeICSInfo)
#define DCT4                                                    STATNAME(DCT4)
#define R4FFT                                                   STATNAME(R4FFT)

#define DecWindowOverlapNoClip                  STATNAME(DecWindowOverlapNoClip)
#define DecWindowOverlapLongStartNoClip STATNAME(DecWindowOverlapLongStartNoClip)
#define DecWindowOverlapLongStopNoClip  STATNAME(DecWindowOverlapLongStopNoClip)
#define DecWindowOverlapShortNoClip             STATNAME(DecWindowOverlapShortNoClip)

#define huffTabSpecInfo                         STATNAME(huffTabSpecInfo)
#define huffTabSpec                                     STATNAME(huffTabSpec)
#define huffTabScaleFactInfo            STATNAME(huffTabScaleFactInfo)
#define huffTabScaleFact                        STATNAME(huffTabScaleFact)
#define cos4sin4tab                                     STATNAME(cos4sin4tab)
#define cos4sin4tabOffset                       STATNAME(cos4sin4tabOffset)
#define cos1sin1tab                                     STATNAME(cos1sin1tab)
#define sinWindow                                       STATNAME(sinWindow)
#define sinWindowOffset                         STATNAME(sinWindowOffset)
#define kbdWindow                                       STATNAME(kbdWindow)
#define kbdWindowOffset                         STATNAME(kbdWindowOffset)
#define bitrevtab                                       STATNAME(bitrevtab)
#define bitrevtabOffset                         STATNAME(bitrevtabOffset)
#define uniqueIDTab                                     STATNAME(uniqueIDTab)
#define twidTabEven                                     STATNAME(twidTabEven)
#define twidTabOdd                                      STATNAME(twidTabOdd)

typedef struct _HuffInfo {
    int maxBits;                                                    /* number of bits in longest codeword */
    unsigned char count[MAX_HUFF_BITS];         /* count[i] = number of codes with length i+1 bits */
    int offset;                                                             /* offset into symbol table */
} HuffInfo;

typedef struct _PulseInfo {
    unsigned char pulseDataPresent;
    unsigned char numPulse;
    unsigned char startSFB;
    unsigned char offset[MAX_PULSES];
    unsigned char amp[MAX_PULSES];
} PulseInfo;

typedef struct _TNSInfo {
    unsigned char tnsDataPresent;
    unsigned char numFilt[MAX_TNS_FILTERS];     /* max 1 filter each for 8 short windows, or 3 filters for 1 long window */
    unsigned char coefRes[MAX_TNS_FILTERS];
    unsigned char length[MAX_TNS_FILTERS];
    unsigned char order[MAX_TNS_FILTERS];
    unsigned char dir[MAX_TNS_FILTERS];
    signed char   coef[MAX_TNS_COEFS];              /* max 3 filters * 20 coefs for 1 long window, or 1 filter * 7 coefs for each of 8 short windows */
} TNSInfo;

typedef struct _GainControlInfo {
    unsigned char gainControlDataPresent;
    unsigned char maxBand;
    unsigned char adjNum[MAX_GAIN_BANDS][MAX_GAIN_WIN];
    unsigned char alevCode[MAX_GAIN_BANDS][MAX_GAIN_WIN][MAX_GAIN_ADJUST];
    unsigned char alocCode[MAX_GAIN_BANDS][MAX_GAIN_WIN][MAX_GAIN_ADJUST];
} GainControlInfo;

typedef struct _ICSInfo {
    unsigned char icsResBit;