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/*
* Siren Encoder/Decoder library
*
* @author: Youness Alaoui <kakaroto@kakaroto.homelinux.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _SIREN_COMMON_H
#define _SIREN_COMMON_H
typedef struct {
unsigned int RiffId;
unsigned int RiffSize;
} RiffHeader;
typedef struct {
unsigned short Format;
unsigned short Channels;
unsigned int SampleRate;
unsigned int ByteRate;
unsigned short BlockAlign;
unsigned short BitsPerSample;
} FmtChunk;
typedef struct {
FmtChunk fmt;
unsigned short ExtraSize;
unsigned short DctLength;
} SirenFmtChunk;
typedef struct {
RiffHeader riff;
unsigned int WaveId;
unsigned int FmtId;
unsigned int FmtSize;
SirenFmtChunk fmt;
unsigned int FactId;
unsigned int FactSize;
unsigned int Samples;
unsigned int DataId;
unsigned int DataSize;
} SirenWavHeader;
typedef struct {
RiffHeader riff;
unsigned int WaveId;
unsigned int FmtId;
unsigned int FmtSize;
FmtChunk fmt;
unsigned int FactId;
unsigned int FactSize;
unsigned int Samples;
unsigned int DataId;
unsigned int DataSize;
} PCMWavHeader;
#define RIFF_ID 0x46464952
#define WAVE_ID 0x45564157
#define FMT__ID 0x20746d66
#define DATA_ID 0x61746164
#define FACT_ID 0x74636166
extern int region_size;
extern float region_size_inverse;
extern float standard_deviation[64];
extern float deviation_inverse[64];
extern float region_power_table_boundary[63];
extern int expected_bits_table[8];
extern int vector_dimension[8];
extern int number_of_vectors[8];
extern float dead_zone[8];
extern int max_bin[8];
extern float step_size[8];
extern float step_size_inverse[8];
extern void siren_init(void);
extern int categorize_regions(int number_of_regions, int number_of_available_bits, int *absolute_region_power_index, int *power_categories, int *category_balance);
extern int GetSirenCodecInfo(int flag, int sample_rate, int *number_of_coefs, int *sample_rate_bits, int *rate_control_bits, int *rate_control_possibilities, int *checksum_bits, int *esf_adjustment, int *scale_factor, int *number_of_regions, int *sample_rate_code, int *bits_per_frame );
#ifdef __BIG_ENDIAN__
#define POW_2_8 256
#define POW_2_16 65536
#define POW_2_24 16777216
#define IDX(val, i) ((unsigned int) ((unsigned char *) &val)[i])
#define ME_FROM_LE16(val) ( (unsigned short) ( IDX(val, 0) + IDX(val, 1) * 256 ))
#define ME_FROM_LE32(val) ( (unsigned int) (IDX(val, 0) + IDX(val, 1) * 256 + \
IDX(val, 2) * 65536 + IDX(val, 3) * 16777216))
#define ME_TO_LE16(val) ( (unsigned short) ( \
(((unsigned short)val % 256) & 0xff) << 8 | \
((((unsigned short)val / POW_2_8) % 256) & 0xff) ))
#define ME_TO_LE32(val) ( (unsigned int) ( \
((((unsigned int) val ) % 256) & 0xff) << 24 | \
((((unsigned int) val / POW_2_8 ) % 256) & 0xff) << 16| \
((((unsigned int) val / POW_2_16) % 256) & 0xff) << 8 | \
((((unsigned int) val / POW_2_24) % 256) & 0xff) ))
#else
#define ME_TO_LE16(val) ( (unsigned short) (val))
#define ME_TO_LE32(val) ( (unsigned int) (val))
#define ME_FROM_LE16(val) ( (unsigned short) (val))
#define ME_FROM_LE32(val) ( (unsigned int) (val))
#endif
#endif /* _SIREN_COMMON_H */
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