FreeCalypso > hg > gsm-codec-lib

annotate libgsmhr1/paramval_cod.c @ 556:18aca50d68df default tip

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doc/Calypso-TCH-downlink: update for FR1 BFI-with-data
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 11 Oct 2024 01:54:00 +0000
parents 03a40ac2e931
children
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03a40ac2e931 libgsmhr1: implement validation for *.cod frames
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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2 * The function implemented in this module examines a frame of 20 int16_t words
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
Mychaela Falconia <falcon@freecalypso.org>
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3 * that corresponds to GSM-HR encoder output format, and checks if the unused
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
Mychaela Falconia <falcon@freecalypso.org>
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4 * upper bits of each int16_t word are cleared as they should be.
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
Mychaela Falconia <falcon@freecalypso.org>
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5 * This function should be used when reading from ETSI-format *.cod files,
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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6 * to guard against reading garbage or wrong endian.
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
Mychaela Falconia <falcon@freecalypso.org>
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7 */
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
Mychaela Falconia <falcon@freecalypso.org>
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8
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
Mychaela Falconia <falcon@freecalypso.org>
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9 #include <stdint.h>
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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10 #include "tw_gsmhr.h"
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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11
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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12 int gsmhr_check_encoder_params(const int16_t *params)
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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13 {
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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14 if (params[18] & 0xFFFE)
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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15 return -1;
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
Mychaela Falconia <falcon@freecalypso.org>
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16 if (params[19] & 0xFFFE)
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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17 return -1;
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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18 return gsmhr_check_common_params(params);
03a40ac2e931 libgsmhr1: implement validation for *.cod frames
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19 }