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annotate libtwamr/d_gain_c.h @ 585:3c6bf0d26ee7 default tip

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TW-TS-005 reader: fix maximum line length bug TW-TS-005 section 4.1 states: The maximum allowed length of each line is 80 characters, not including the OS-specific newline encoding. The implementation of this line length limit in the TW-TS-005 hex file reader function in the present suite was wrong, such that lines of the full maximum length could not be read. Fix it. Note that this bug affects comment lines too, not just actual RTP payloads. Neither Annex A nor Annex B features an RTP payload format that goes to the maximum of 40 bytes, but if a comment line goes to the maximum allowed length of 80 characters not including the terminating newline, the bug will be triggered, necessitating the present fix.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Feb 2025 07:49:28 +0000
parents a723d9f9f697
children
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a723d9f9f697 libtwamr: integrate d_gain_c.c
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : d_gain_c.h
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11 * Purpose : Decode the fixed codebook gain using the received index.
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12 *
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13 ********************************************************************************
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14 */
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15 #ifndef d_gain_c_h
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16 #define d_gain_c_h "$Id $"
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17
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18 /*
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19 ********************************************************************************
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20 * INCLUDE FILES
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21 ********************************************************************************
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22 */
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23 #include "tw_amr.h"
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24 #include "typedef.h"
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25 #include "gc_pred.h"
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26
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27 /*
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28 ********************************************************************************
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29 * DECLARATION OF PROTOTYPES
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30 ********************************************************************************
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31 */
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32 /*
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33 **************************************************************************
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34 *
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35 * Function : d_gain_code
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36 * Purpose : Decode the fixed codebook gain using the received index.
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37 * Description : The received index gives the gain correction factor
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38 * gamma. The quantized gain is given by g_q = g0 * gamma
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39 * where g0 is the predicted gain. To find g0, 4th order
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40 * MA prediction is applied to the mean-removed innovation
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41 * energy in dB.
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42 * Returns : void
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43 *
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44 **************************************************************************
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45 */
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46 void d_gain_code (
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47 gc_predState *pred_state, /* i/o : MA predictor state */
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48 enum Mode mode, /* i : AMR mode */
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49 Word16 index, /* i : received quantization index */
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50 Word16 code[], /* i : innovation codevector */
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51 Word16 *gain_code /* o : decoded innovation gain */
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52 );
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53
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54 #endif