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annotate libgsmefr/vad.h @ 183:452c1d5a6268

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libgsmefr BFI w/o data: emit zero output after decoder reset In real-life usage, each EFR decoder session will most likely begin with lots of BFI frames before the first real frame arrives. However, because the spec-defined home state of the decoder is speech rather than CN, our regular logic for BFI w/o data would have to feed pseudorandom noise to the decoder (in the "fixed codebook excitation pulses" part), which is silly to do at the beginning of the decoder session right out of reset. Therefore, let's check reset_flag_old, and if we are still in the reset state, simply emit zero output.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 03 Jan 2023 00:12:18 +0000
parents 756605c4850f
children
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1 /***************************************************************************
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2 *
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3 * File Name: vad.h
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4 *
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5 * Purpose: Contains the prototypes for all functions of voice activity
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6 * detection. Also contains the type definition for the pseudo
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7 * floating point data type.
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8 *
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9 **************************************************************************/
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10
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11 void vad_reset (struct EFR_encoder_state *st);
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13 Word16 vad_computation (
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14 struct EFR_encoder_state *st,
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15 Word16 r_h[],
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16 Word16 r_l[],
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17 Word16 scal_acf,
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18 Word16 rc[],
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19 Word16 ptch
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20 );
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22 void periodicity_update (
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23 struct EFR_encoder_state *st,
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24 Word16 lags[]
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25 );