FreeCalypso > hg > gsm-codec-lib
view amrconv/if1_unpack.c @ 282:9ee8ad3d4d30
frtest: rm gsmfr-hand-test and gsmfr-max-out utils
These hack programs were never properly documented and were written
only as part of a debug chase, in pursuit of a bug that ultimately
turned out to be in our then-hacky patch to osmo-bts-sysmo,
before beginning of proper patches in Osmocom. These hack programs
need to be dropped from the present sw package because they depend
on old libgsm, and we are eliminating that dependency.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 14 Apr 2024 05:44:47 +0000 |
parents | 934cf92a1c45 |
children |
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/* * In this module we implement our function for unpacking bits from AMR IF1 * and reshuffling them into the codec's natural bit order. */ #include <stdint.h> #include "amr_defs.h" extern const uint8_t amr_475_bit_order[95]; extern const uint8_t amr_515_bit_order[103]; extern const uint8_t amr_59_bit_order[118]; extern const uint8_t amr_67_bit_order[134]; extern const uint8_t amr_74_bit_order[148]; extern const uint8_t amr_795_bit_order[159]; extern const uint8_t amr_102_bit_order[204]; extern const uint8_t amr_122_bit_order[244]; static void unpack_bits(if1_bytes, codec_bits, nbits, table) uint8_t *if1_bytes, *codec_bits; unsigned nbits; const uint8_t *table; { unsigned n, nb; for (n = 0; n < nbits; n++) { if (table) nb = table[n]; else nb = n; codec_bits[nb] = msb_get_bit(if1_bytes, n); } } amr_if1_unpack(if1_bytes, codec_bits, mode) uint8_t *if1_bytes, *codec_bits; unsigned mode; { switch (mode) { case MR475: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_475, amr_475_bit_order); return(0); case MR515: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_515, amr_515_bit_order); return(0); case MR59: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_59, amr_59_bit_order); return(0); case MR67: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_67, amr_67_bit_order); return(0); case MR74: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_74, amr_74_bit_order); return(0); case MR795: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_795, amr_795_bit_order); return(0); case MR102: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_102, amr_102_bit_order); return(0); case MR122: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_122, amr_122_bit_order); return(0); case MRDTX: unpack_bits(if1_bytes, codec_bits, AMR_NBITS_SID, (const uint8_t *) 0); return(0); default: return(-1); } }