FreeCalypso > hg > freecalypso-tools
annotate uptools/libcoding/gsm7_unpack.c @ 666:51bcfb251b23
fc-loadtool flash program-m0 changed to use binary protocol
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 07 Mar 2020 19:28:09 +0000 |
parents | d29b45c4c8db |
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rev | line source |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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uptools/libcoding: 7-bit decoding implemented
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2 * This library module implements unpacking of GSM 7-bit data |
d29b45c4c8db
uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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3 * from packed octets. |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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4 */ |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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5 |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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6 #include <sys/types.h> |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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7 |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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8 static u_char shift[8] = {0, 7, 6, 5, 4, 3, 2, 1}; |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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9 |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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10 gsm7_unpack(inbuf, outbuf, nseptets) |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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11 u_char *inbuf, *outbuf; |
d29b45c4c8db
uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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12 unsigned nseptets; |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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13 { |
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uptools/libcoding: 7-bit decoding implemented
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14 u_char *inp = inbuf, *outp = outbuf; |
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15 unsigned n; |
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16 |
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uptools/libcoding: 7-bit decoding implemented
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17 for (n = 0; n < nseptets; n++) { |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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18 *outp++ = (((inp[1] << 8) | inp[0]) >> shift[n&7]) & 0x7F; |
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uptools/libcoding: 7-bit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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19 if (n & 7) |
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20 inp++; |
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Mychaela Falconia <falcon@freecalypso.org>
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21 } |
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uptools/libcoding: 7-bit decoding implemented
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22 } |