FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/prm2bits.c @ 401:59655481e45b
libtwamr: integrate pstfilt.c
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 06 May 2024 19:44:15 +0000 |
parents | ffd48f0a2ab5 |
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1 /* |
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2 * A cleaner reimplementation of AMR Prm2bits() function. |
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3 */ |
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4 |
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5 #include "typedef.h" |
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6 #include "namespace.h" |
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7 #include "bitno.h" |
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8 #include "prm2bits.h" |
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Mychaela Falconia <falcon@freecalypso.org>
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9 |
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10 void Prm2bits(enum Mode mode, const Word16 prm[], Word16 bits[]) |
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11 { |
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12 const Word16 *t = bitno[mode]; |
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13 unsigned nparam = prmno[mode]; |
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14 unsigned n, p, mask; |
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15 Word16 *b = bits; |
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16 |
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17 for (n = 0; n < nparam; n++) { |
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18 p = prm[n]; |
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19 mask = 1 << (*t++ - 1); |
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20 for (; mask; mask >>= 1) { |
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21 if (p & mask) |
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22 *b++ = 1; |
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23 else |
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24 *b++ = 0; |
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25 } |
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26 } |
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27 } |