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annotate libgsmefr/e_homing.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 035424a6ca83
children
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1 /**************************************************************************
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2 *
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3 * File Name: e_homing.h
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4 *
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5 * Purpose: Contains the prototypes for all the functions of
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6 * encoder homing.
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7 *
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8 **************************************************************************/
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10 #define EHF_MASK 0x0008 /* Encoder Homing Frame pattern */
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12 /* Function Prototypes */
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14 Word16 encoder_homing_frame_test (const Word16 input_frame[]);
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988fd7ff514f libgsmefr: add state pointers to ETSI function prototypes
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16 void encoder_reset (struct EFR_encoder_state *st);