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/************************* MPEG-2 NBC Audio Decoder **************************
* *
"This software module was originally developed by
AT&T, Dolby Laboratories, Fraunhofer Gesellschaft IIS and edited by
Yoshiaki Oikawa (Sony Corporation),
Mitsuyuki Hatanaka (Sony Corporation),
in the course of development of the MPEG-2 NBC/MPEG-4 Audio standard ISO/IEC 13818-7,
14496-1,2 and 3. This software module is an implementation of a part of one or more
MPEG-2 NBC/MPEG-4 Audio tools as specified by the MPEG-2 NBC/MPEG-4
Audio standard. ISO/IEC gives users of the MPEG-2 NBC/MPEG-4 Audio
standards free license to this software module or modifications thereof for use in
hardware or software products claiming conformance to the MPEG-2 NBC/MPEG-4
Audio standards. Those intending to use this software module in hardware or
software products are advised that this use may infringe existing patents.
The original developer of this software module and his/her company, the subsequent
editors and their companies, and ISO/IEC have no liability for use of this software
module or modifications thereof in an implementation. Copyright is not released for
non MPEG-2 NBC/MPEG-4 Audio conforming products.The original developer
retains full right to use the code for his/her own purpose, assign or donate the
code to a third party and to inhibit third party from using the code for non
MPEG-2 NBC/MPEG-4 Audio conforming products. This copyright notice must
be included in all copies or derivative works."
Copyright(c)1996.
* *
****************************************************************************/
#ifndef _all_h_
#define _all_h_
#include
#include "stdinc.h"
#include "interface.h"
#include "tns.h"
typedef float Float;
#ifndef HAS_ULONG
typedef unsigned long ulong;
#endif
typedef unsigned char byte;
enum
{
/*
* channels for 5.1 main profile configuration
* (modify for any desired decoder configuration)
*/
#if 0
FChans = 3, /* front channels: left, center, right */
FCenter = 0, /* 1 if decoder has front center channel */
SChans = 2, /* side channels: */
BChans = 1, /* back channels: left surround, right surround */
BCenter = 0, /* 1 if decoder has back center channel */
LChans = 1, /* LFE channels */
XChans = 1, /* scratch space for parsing unused channels */
#else
FChans = 2, /* front channels: left, center, right */
FCenter = 0, /* 1 if decoder has front center channel */
SChans = 0, /* side channels: */
BChans = 0, /* back channels: left surround, right surround */
BCenter = 0, /* 1 if decoder has back center channel */
LChans = 0, /* LFE channels */
XChans = 0, /* scratch space for parsing unused channels */
#endif
Chans = FChans + SChans + BChans + LChans + XChans
};
/* #define is required in order to use these args in #if () directive */
#if 0
#define ICChans 1 /* independently switched coupling channels */
#define DCChans 2 /* dependently switched coupling channels */
#define XCChans 1 /* scratch space for parsing unused coupling channels */
#define CChans (ICChans + DCChans + XCChans)
#else
#define ICChans 0
#define DCChans 0
#define XCChans 0
#define CChans 0
#endif
enum
{
/* block switch windows for single channels or channel pairs */
Winds = Chans,
/* average channel block length, bytes */
Avjframe = 341,
TEXP = 128, /* size of exp cache table */
MAX_IQ_TBL = 128, /* size of inv quant table */
MAXFFT = LN4,
XXXXX
};
typedef struct
{
int islong; /* true if long block */
int nsbk; /* sub-blocks (SB) per block */
int bins_per_bk; /* coef's per block */
int sfb_per_bk; /* sfb per block */
int bins_per_sbk[MAX_SBK]; /* coef's per SB */
int sfb_per_sbk[MAX_SBK]; /* sfb per SB */
int sectbits[MAX_SBK];
short *sbk_sfb_top[MAX_SBK]; /* top coef per sfb per SB */
short *sfb_width_128; /* sfb width for short blocks */
short bk_sfb_top[200]; /* cum version of above */
int num_groups;
short group_len[8];
short group_offs[8];
} Info;
typedef struct {
int samp_rate;
int nsfb1024;
short* SFbands1024;
int nsfb128;
short* SFbands128;
} SR_Info;
typedef struct
{
byte this_bk;
byte prev_bk;
} Wnd_Shape;
typedef struct
{
int index;
int len;
ulong cw;
} Huffman;
typedef struct
{
int n;
int dim;
int lav;
int mod;
int off;
int signed_cb;
Huffman *hcw;
} Hcb;
typedef struct
{
int present; /* channel present */
int tag; /* element tag */
int cpe; /* 0 if single channel, 1 if channel pair */
int common_window; /* 1 if common window for cpe */
int ch_is_left; /* 1 if left channel of cpe */
int paired_ch; /* index of paired channel in cpe */
int widx; /* window element index for this channel */
int is_present; /* intensity stereo is used */
int ncch; /* number of coupling channels for this ch */
#if (CChans > 0)
int cch[CChans]; /* coupling channel idx */
int cc_dom[CChans]; /* coupling channel domain */
int cc_ind[CChans]; /* independently switched coupling channel flag */
#endif
char *fext; /* filename extension */
} Ch_Info;
typedef struct {
int nch; /* total number of audio channels */
int nfsce; /* number of front SCE's pror to first front CPE */
int nfch; /* number of front channels */
int nsch; /* number of side channels */
int nbch; /* number of back channels */
int nlch; /* number of lfe channels */
int ncch; /* number of valid coupling channels */
int cch_tag[(1<