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annotate libtwamr/fr_type_conv.c @ 477:4c9222d95647

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libtwamr encoder: always emit frame->mode = mode; In the original implementation of amr_encode_frame(), the 'mode' member of the output struct was set to 0xFF if the output frame type is TX_NO_DATA. This design was made to mimic the mode field (16-bit word) being set to 0xFFFF (or -1) in 3GPP test sequence format - but nothing actually depends on this struct member being set in any way, and amr_frame_to_tseq() generates the needed 0xFFFF on its own, based on frame->type being equal to TX_NO_DATA. It is simpler and more efficient to always set frame->mode to the actual encoding mode in amr_encode_frame(), and this new behavior has already been documented in doc/AMR-library-API description in anticipation of the present change.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 May 2024 22:30:42 +0000
parents ffd87f972f86
children
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ffd87f972f86 libtwamr: implement TXFrameType to RXFrameType conversion
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1 /*
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2 * The function implemented in this module converts from TXFrameType
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3 * to RXFrameType. It is needed for decoding standard test sequence
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4 * .cod files, where TXFrameType is used in the file but RXFrameType
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5 * is needed for decoding.
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6 */
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7
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8 #include "tw_amr.h"
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9
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10 int amr_txtype_to_rxtype(enum TXFrameType tx_type, enum RXFrameType *rx_type)
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11 {
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12 switch (tx_type) {
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13 case TX_SPEECH_GOOD:
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14 *rx_type = RX_SPEECH_GOOD;
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15 return 0;
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16 case TX_SPEECH_DEGRADED:
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17 *rx_type = RX_SPEECH_DEGRADED;
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18 return 0;
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19 case TX_SPEECH_BAD:
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20 *rx_type = RX_SPEECH_BAD;
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21 return 0;
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22 case TX_SID_FIRST:
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23 *rx_type = RX_SID_FIRST;
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24 return 0;
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25 case TX_SID_UPDATE:
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26 *rx_type = RX_SID_UPDATE;
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27 return 0;
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28 case TX_SID_BAD:
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29 *rx_type = RX_SID_BAD;
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30 return 0;
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31 case TX_ONSET:
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32 *rx_type = RX_ONSET;
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33 return 0;
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34 case TX_NO_DATA:
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35 *rx_type = RX_NO_DATA;
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36 return 0;
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37 default:
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38 return -1;
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39 }
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40 }