FreeCalypso > hg > gsm-codec-lib
view libtwamr/spreproc.h @ 497:a1599eaf51f9
top Makefile: add libgsmhr1
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 18 Jun 2024 23:57:26 +0000 |
parents | 7e0aeab69b10 |
children |
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/* ******************************************************************************** * * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 * R99 Version 3.3.0 * REL-4 Version 4.1.0 * ******************************************************************************** * * File : spreproc.h * Purpose : Subframe preprocessing * ******************************************************************************** */ #ifndef spreproc_h #define spreproc_h "$Id $" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "tw_amr.h" #include "typedef.h" #include "cnst.h" /* ******************************************************************************** * DECLARATION OF PROTOTYPES ******************************************************************************** */ int subframePreProc( enum Mode mode, /* i : coder mode */ const Word16 gamma1[], /* i : spectral exp. factor 1 */ const Word16 gamma1_12k2[],/* i : spectral exp. factor 1 for EFR */ const Word16 gamma2[], /* i : spectral exp. factor 2 */ Word16 *A, /* i : A(z) unquantized for the 4 subframes */ Word16 *Aq, /* i : A(z) quantized for the 4 subframes */ Word16 *speech, /* i : speech segment */ Word16 *mem_err, /* i : pointer to error signal */ Word16 *mem_w0, /* i : memory of weighting filter */ Word16 *zero, /* i : pointer to zero vector */ Word16 ai_zero[], /* o : history of weighted synth. filter */ Word16 exc[], /* o : long term prediction residual */ Word16 h1[], /* o : impulse response */ Word16 xn[], /* o : target vector for pitch search */ Word16 res2[], /* o : long term prediction residual */ Word16 error[] /* o : error of LPC synthesis filter */ ); #endif