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Diffstat (limited to 'Src/replicant/nsmp3dec/mpeg.h')
| -rw-r--r-- | Src/replicant/nsmp3dec/mpeg.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/Src/replicant/nsmp3dec/mpeg.h b/Src/replicant/nsmp3dec/mpeg.h new file mode 100644 index 00000000..00f06e8b --- /dev/null +++ b/Src/replicant/nsmp3dec/mpeg.h @@ -0,0 +1,174 @@ +/***************************************************************************\ + * +* MPEG Layer3-Audio Decoder +* © 1997-2006 by Fraunhofer IIS + * All Rights Reserved + * + * filename: mpeg.h + * project : ISO/MPEG-Decoder + * author : Markus Werner, addings: Martin Sieler + * date : 1995-07-07 + * contents/description: HEADER - iso/mpeg-definitions + * + * +\***************************************************************************/ + +/* + * $Date: 2011/01/20 22:14:40 $ + * $Id: mpeg.h,v 1.3 2011/01/20 22:14:40 audiodsp Exp $ + */ + +/*-------------------------------------------------------------------------*/ + +#ifndef __MPEG_H__ +#define __MPEG_H__ +#include "foundation/align.h" + +/* ------------------------ includes --------------------------------------*/ + +/* ------------------------------------------------------------------------*/ + +// +// MPEG ID (fhgVersion) +// +#define MPG_MPEG1 1 +#define MPG_MPEG2 0 +#define MPG_MPEG25 2 + +/* ------------------------------------------------------------------------*/ + +// +// sample rate +// +#define MPG_SF_LOW 2 + +/* ------------------------------------------------------------------------*/ + +// +// header-mode field +// +#define MPG_MD_STEREO 0 +#define MPG_MD_JOINT_STEREO 1 +#define MPG_MD_DUAL_CHANNEL 2 +#define MPG_MD_MONO 3 + +/*-------------------------------------------------------------------------*/ + +// +// channels +// +#define MONO 1 +#define STEREO 2 + +/* ------------------------------------------------------------------------*/ + +// +// subbands, samples/subband +// +#define SBLIMIT 32 +#define SSLIMIT 18 + +/* ------------------------------------------------------------------------*/ + +// +// info structure +// +typedef struct + { + int stereo; + int sample_rate_ndx; + int frame_bits; + int mode; + int mode_ext; + int header_size; + int fhgVersion; + int protection; + bool IsMpeg1; + } MPEG_INFO; + +/* ------------------------------------------------------------------------*/ + +// +// MPEG Layer-3 sideinfo (per channel/granule) +// +typedef struct + { + int part2_3_length; + int big_values; + int global_gain; + int scalefac_compress; + int window_switching_flag; + int block_type; + int mixed_block_flag; + int table_select[3]; + int subblock_gain[3]; + int region0_count; + int region1_count; + int preflag; + int scalefac_scale; + int count1table_select; + + // additional calced values + int intensity_scale; // MPEG 2, MPEG 2.5 only + int zeroStartNdx; + int zeroSfbStartNdxIsLong; + int zeroSfbStartNdxL; + int zeroSfbStartNdxSMax; + int zeroSfbStartNdxS[3]; + int zeroSbStartNdx; + } MP3SI_GRCH; + +/* ------------------------------------------------------------------------*/ + +// +// MPEG Layer-3 sideinfo +// +typedef struct + { + int main_data_begin; + int private_bits; + struct + { + int scfsi[4]; + MP3SI_GRCH gr[2]; + } ch[2]; + } MP3SI; + +/* ------------------------------------------------------------------------*/ + +// +// MPEG Layer-3 scalefactors +// +typedef struct + { + // scalefactors + int l[23]; + int s[3][13]; + + // illegal intensity position + int l_iip[23]; + int s_iip[13]; + } MP3SCF; + +/* ------------------------------------------------------------------------*/ + +// +// spectrum (as transmitted) +// +typedef NALIGN(16) float SPECTRUM[2][SBLIMIT][SSLIMIT]; + +// +// spectrum (after mdct) +// +typedef NALIGN(16) float POLYSPECTRUM[2][SSLIMIT][SBLIMIT]; + +/* Nullsoft added 25 Oct 2007 */ +struct DecoderHooks +{ + void (*layer3_vis)(SPECTRUM vistable,int gr, int nch); + void (*layer2_eq)(float *xr, int nch, int srate, int nparts); + void (*layer3_eq)(float *xr, int nch, int srate); +}; + +/* ------------------------------------------------------------------------*/ +#endif |