FreeCalypso > hg > gsm-codec-lib
view libtwamr/spstproc.h @ 477:4c9222d95647
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 | a37687c6ff22 |
| 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 : subframePostProc.h * Purpose : Subframe post processing * ******************************************************************************** */ #ifndef spstproc_h #define spstproc_h "$Id $" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "tw_amr.h" #include "typedef.h" /* ******************************************************************************** * LOCAL VARIABLES AND TABLES ******************************************************************************** */ /* ******************************************************************************** * PUBLIC PROGRAM CODE ******************************************************************************** */ int subframePostProc( Word16 *speech, /* i : speech segment */ enum Mode mode, /* i : coder mode */ Word16 i_subfr, /* i : Subframe nr */ Word16 gain_pit, /* i : Pitch gain Q14 */ Word16 gain_code, /* i : Decoded innovation gain */ Word16 *Aq, /* i : A(z) quantized for the 4 subframes */ Word16 synth[], /* i : Local snthesis */ Word16 xn[], /* i : Target vector for pitch search */ Word16 code[], /* i : Fixed codebook exitation */ Word16 y1[], /* i : Filtered adaptive exitation */ Word16 y2[], /* i : Filtered fixed codebook excitation */ Word16 *mem_syn, /* i/o : memory of synthesis filter */ Word16 *mem_err, /* o : pointer to error signal */ Word16 *mem_w0, /* o : memory of weighting filter */ Word16 *exc, /* o : long term prediction residual */ Word16 *sharp /* o : pitch sharpening value */ ); #endif