147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/*
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* Siren Encoder/Decoder library
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*
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* @author: Youness Alaoui <kakaroto@kakaroto.homelinux.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef _SIREN_COMMON_H
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#define _SIREN_COMMON_H
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typedef struct {
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unsigned int RiffId;
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unsigned int RiffSize;
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} RiffHeader;
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typedef struct {
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unsigned short Format;
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unsigned short Channels;
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unsigned int SampleRate;
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unsigned int ByteRate;
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unsigned short BlockAlign;
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unsigned short BitsPerSample;
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} FmtChunk;
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typedef struct {
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FmtChunk fmt;
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unsigned short ExtraSize;
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unsigned short DctLength;
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} SirenFmtChunk;
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typedef struct {
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RiffHeader riff;
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unsigned int WaveId;
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unsigned int FmtId;
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unsigned int FmtSize;
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SirenFmtChunk fmt;
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unsigned int FactId;
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unsigned int FactSize;
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unsigned int Samples;
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unsigned int DataId;
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unsigned int DataSize;
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} SirenWavHeader;
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typedef struct {
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RiffHeader riff;
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unsigned int WaveId;
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unsigned int FmtId;
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unsigned int FmtSize;
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FmtChunk fmt;
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unsigned int FactId;
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unsigned int FactSize;
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unsigned int Samples;
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unsigned int DataId;
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unsigned int DataSize;
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} PCMWavHeader;
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#define RIFF_ID 0x46464952
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#define WAVE_ID 0x45564157
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#define FMT__ID 0x20746d66
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#define DATA_ID 0x61746164
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#define FACT_ID 0x74636166
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extern int region_size;
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extern float region_size_inverse;
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extern float standard_deviation[64];
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extern float deviation_inverse[64];
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extern float region_power_table_boundary[63];
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extern int expected_bits_table[8];
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extern int vector_dimension[8];
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extern int number_of_vectors[8];
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extern float dead_zone[8];
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extern int max_bin[8];
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extern float step_size[8];
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extern float step_size_inverse[8];
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extern void siren_init();
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extern int categorize_regions(int number_of_regions, int number_of_available_bits, int *absolute_region_power_index, int *power_categories, int *category_balance);
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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 );
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#ifdef __BIG_ENDIAN__
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#define POW_2_8 256
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#define POW_2_16 65536
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#define POW_2_24 16777216
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#define IDX(val, i) ((unsigned int) ((unsigned char *) &val)[i])
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#define ME_FROM_LE16(val) ( (unsigned short) ( IDX(val, 0) + IDX(val, 1) * 256 ))
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#define ME_FROM_LE32(val) ( (unsigned int) (IDX(val, 0) + IDX(val, 1) * 256 + \
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IDX(val, 2) * 65536 + IDX(val, 3) * 16777216))
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#define ME_TO_LE16(val) ( (unsigned short) ( \
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(((unsigned short)val % 256) & 0xff) << 8 | \
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((((unsigned short)val / POW_2_8) % 256) & 0xff) ))
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#define ME_TO_LE32(val) ( (unsigned int) ( \
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((((unsigned int) val ) % 256) & 0xff) << 24 | \
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((((unsigned int) val / POW_2_8 ) % 256) & 0xff) << 16| \
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((((unsigned int) val / POW_2_16) % 256) & 0xff) << 8 | \
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((((unsigned int) val / POW_2_24) % 256) & 0xff) ))
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#else
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#define ME_TO_LE16(val) ( (unsigned short) (val))
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#define ME_TO_LE32(val) ( (unsigned int) (val))
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#define ME_FROM_LE16(val) ( (unsigned short) (val))
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#define ME_FROM_LE32(val) ( (unsigned int) (val))
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#endif
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#endif /* _SIREN_COMMON_H */
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