FreeCalypso > hg > fc-magnetite

annotate src/cs/layer1/gtt_include/ctm/m_sequence.h @ 702:9394305d4ff5 default tip

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etm_audio.c: fix off-by-one error in auw of FIR coefficients This fix was already made in FC Tourmaline a while back, but it is also the kind of bugfix that deserves to be backported to Magnetite and Selenite as well.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 31 Oct 2022 00:14:44 +0000
parents 945cf7f506b2
children
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1 /*
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2 *******************************************************************************
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3 *
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4 * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
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5 * 90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100
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6 *
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7 * The program(s) may be used and/or copied only with the
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8 * written permission from Ericsson or in accordance
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9 * with the terms and conditions stipulated in the agreement or
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10 * contract under which the program(s) have been supplied.
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11 *
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12 *******************************************************************************
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13 *
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14 * File : m_sequence.h
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15 * Purpose : Calculation of m-sequences
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16 * (maximum-length sequecnes or pseudo noise)
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17 *
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18 *******************************************************************************
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19 */
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20
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21 #ifndef m_sequence_h
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22 #define m_sequence_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
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30
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31 /*
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32 *******************************************************************************
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33 * DECLARATION OF PROTOTYPES
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34 *******************************************************************************
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35 */
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36
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37 /* -------------------------------------------------------------------- */
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38 /* function m_sequence() */
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39 /* ********************* */
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40 /* Calculates one period of an m-sequence (binary pseudo noise). */
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41 /* The sequence is stored in the vector sequence, which must have a */
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42 /* of (2^r)-1, where r is an integer number between 2 and 10. */
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43 /* Therefore, with this release of m_sequence, sequences of length */
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44 /* 3, 7, 15, 31, 63, 127, 255, 511, or 1023 can be generated. */
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45 /* The resulting sequence is bipolar, i.e. it has values -1 and +1. */
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46 /* -------------------------------------------------------------------- */
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47
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48 void m_sequence(WORD16 *sequence, WORD16 length);
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49
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50
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51 #endif
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52
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