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annotate libgsmefr/oper_32b.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 3da7ab45910d
children
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1 /* Double precision operations */
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2
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3 /*****************************************************************************
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4 * *
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5 * Function L_Extract() *
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6 * *
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7 * Extract from a 32 bit integer two 16 bit DPF. *
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8 * *
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9 * Arguments: *
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10 * *
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11 * L_32 : 32 bit integer. *
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12 * 0x8000 0000 <= L_32 <= 0x7fff ffff. *
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13 * hi : b16 to b31 of L_32 *
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14 * lo : (L_32 - hi<<16)>>1 *
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15 *****************************************************************************
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16 */
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17
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18 static inline void L_Extract (Word32 L_32, Word16 *hi, Word16 *lo)
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19 {
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20 *hi = L_32 >> 16;
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21 *lo = (L_32 & 0xFFFF) >> 1;
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22 }
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23
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24 /*****************************************************************************
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25 * *
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26 * Function L_Comp() *
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27 * *
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28 * Compose from two 16 bit DPF a 32 bit integer. *
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29 * *
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30 * L_32 = hi<<16 + lo<<1 *
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31 * *
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32 * Arguments: *
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33 * *
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34 * hi msb *
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35 * lo lsf (with sign) *
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36 * *
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37 * Return Value : *
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38 * *
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39 * 32 bit long signed integer (Word32) whose value falls in the *
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40 * range : 0x8000 0000 <= L_32 <= 0x7fff fff0. *
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41 * *
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42 *****************************************************************************
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43 */
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44
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45 static inline Word32 L_Comp (Word16 hi, Word16 lo)
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46 {
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47 return ((Word32) hi << 16) + ((Word32) lo << 1);
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48 }
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49
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50 Word32 Mpy_32 (Word16 hi1, Word16 lo1, Word16 hi2, Word16 lo2);
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51 Word32 Mpy_32_16 (Word16 hi, Word16 lo, Word16 n);
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52 Word32 Div_32 (Word32 L_num, Word16 denom_hi, Word16 denom_lo);