FreeCalypso > hg > gsm-codec-lib
view libtwamr/q_gain_p.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 | a01de4e40540 |
| 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 : q_gain_p.h * Purpose : Scalar quantization of the pitch gain * ******************************************************************************** */ #ifndef q_gain_p_h #define q_gain_p_h "$Id $" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "tw_amr.h" #include "typedef.h" /* ******************************************************************************** * DEFINITION OF DATA TYPES ******************************************************************************** */ /* ******************************************************************************** * DECLARATION OF PROTOTYPES ******************************************************************************** */ Word16 q_gain_pitch ( /* Return index of quantization */ enum Mode mode, /* i : AMR mode */ Word16 gp_limit, /* i : pitch gain limit */ Word16 *gain, /* i/o: Pitch gain (unquant/quant), Q14 */ Word16 gain_cand[], /* o : pitch gain candidates (3), MR795 only, Q14 */ Word16 gain_cind[] /* o : pitch gain cand. indices (3),MR795 only, Q0 */ ); #endif