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annotate libgsmefr/bfi_nodata.c @ 122:b33f2168fdec

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doc/EFR-rationale article written
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 10 Dec 2022 08:51:01 +0000
parents 7152cc7d1ca3
children eefef9f6d533
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7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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2 * In the expected usage mode of our libgsmefr decoder as part of "soft TRAU"
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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3 * uplink implementation, there will be times when the radio subsystem tells
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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4 * us that a frame has been lost, but we don't have any errored bits to feed
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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5 * to the decoder as ETSI canon calls for. We could of course call
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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6 * EFR_decode_frame() with a dummy frame of all zeros and BFI=1, but the
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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7 * EFR_decode_bfi_nodata() function provided in this module accomplishes
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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8 * the same effect more efficiently.
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
Mychaela Falconia <falcon@freecalypso.org>
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9 */
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10
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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11 #include <string.h>
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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12 #include "gsm_efr.h"
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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14 void EFR_decode_bfi_nodata(struct EFR_decoder_state *st, int taf,
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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15 int16_t *pcm_out)
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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16 {
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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17 int16_t params[EFR_NUM_PARAMS];
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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18
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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19 memset(params, 0, sizeof(int16_t) * EFR_NUM_PARAMS);
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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20 EFR_decode_params(st, params, 1, 0, taf, pcm_out);
7152cc7d1ca3 libgsmefr: implement EFR_decode_bfi_nodata()
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21 }