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annotate libtwamr/g_adapt.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 2a265be82195
children
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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 : g_adapt.h
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11 * Purpose : gain adaptation for MR795 gain quantization
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12 *
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13 ********************************************************************************
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14 */
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15
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16 /*
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17 ********************************************************************************
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18 * MODULE INCLUDE FILE AND VERSION ID
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19 ********************************************************************************
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20 */
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21 #ifndef g_adapt_h
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22 #define g_adapt_h "$Id $"
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23
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24 /*
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25 ********************************************************************************
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26 * INCLUDE FILES
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27 ********************************************************************************
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28 */
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29 #include "typedef.h"
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30
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31 #define LTPG_MEM_SIZE 5 /* number of stored past LTP coding gains + 1 */
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32
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33 /*
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34 ********************************************************************************
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35 * DEFINITION OF DATA TYPES
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36 ********************************************************************************
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37 */
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38 typedef struct {
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39 Word16 onset; /* onset state, Q0 */
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40 Word16 prev_alpha; /* previous adaptor output, Q15 */
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41 Word16 prev_gc; /* previous code gain, Q1 */
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42
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43 Word16 ltpg_mem[LTPG_MEM_SIZE]; /* LTP coding gain history, Q13 */
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44 /* (ltpg_mem[0] not used for history) */
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45 } GainAdaptState;
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46
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47 /*
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48 ********************************************************************************
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49 * DECLARATION OF PROTOTYPES
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50 ********************************************************************************
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51 */
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52
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53 void gain_adapt_reset (GainAdaptState *st);
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54 /* reset of gain adaptor state (i.e. set state memory to zero)
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55 returns 0 on success
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56 */
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57
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58 /*************************************************************************
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59 *
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60 * Function: gain_adapt()
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61 * Purpose: calculate pitch/codebook gain adaptation factor alpha
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62 * (and update the adaptor state)
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63 *
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64 **************************************************************************
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65 */
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66 void gain_adapt(
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67 GainAdaptState *st, /* i : state struct */
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68 Word16 ltpg, /* i : ltp coding gain (log2()), Q */
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69 Word16 gain_cod, /* i : code gain, Q13 */
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70 Word16 *alpha /* o : gain adaptation factor, Q15 */
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71 );
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72
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73 #endif