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annotate libgsmefr/gains_tb.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 36e1363ad885
children
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1 /*-----------------------------------------------------------------------*
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2 * Scalar quantization tables of the pitch gain and the codebook gain. *
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3 *-----------------------------------------------------------------------*/
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4
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5 #define NB_QUA_PITCH 16
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6
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7 static const Word16 qua_gain_pitch[NB_QUA_PITCH] =
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8 {
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9 0, 3277, 6556, 8192, 9830, 11469, 12288, 13107,
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10 13926, 14746, 15565, 16384, 17203, 18022, 18842, 19661
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11 };
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12
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13 #define NB_QUA_CODE 32
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14
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15 static const Word16 qua_gain_code[NB_QUA_CODE] =
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16 {
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17 159, 206, 268, 349, 419, 482, 554, 637,
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18 733, 842, 969, 1114, 1281, 1473, 1694, 1948,
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19 2241, 2577, 2963, 3408, 3919, 4507, 5183, 5960,
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20 6855, 7883, 9065, 10425, 12510, 16263, 21142, 27485
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21 };