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annotate libtwamr/sqrt_l.h @ 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 8dfb7cbe6b59
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 : sqrt_l.h
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11 * Purpose : Computes sqrt(L_x), where L_x is positive.
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12 * : If L_x is negative or zero, the result is
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13 * : 0 (3fff ffff).
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14 *
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15 ********************************************************************************
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16 */
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17 #ifndef sqrt_l_h
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18 #define sqrt_l_h "$Id $"
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19
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20 /*
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21 ********************************************************************************
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22 * INCLUDE FILES
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23 ********************************************************************************
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24 */
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25 #include "typedef.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 Word32 sqrt_l_exp (/* o : output value, Q31 */
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34 Word32 L_x, /* i : input value, Q31 */
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35 Word16 *exp /* o : right shift to be applied to result, Q0 */
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36 );
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37
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38 #endif