FreeCalypso > hg > gsm-codec-lib
view libtwamr/bits2prm.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 | f931e704adc5 |
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 : bits2prm.h * Purpose : Retrieves the vector of encoder parameters from * : the received serial bits in a frame. * ***************************************************************************** */ #ifndef bits2prm_h #define bits2prm_h "$Id $" /* ***************************************************************************** * INCLUDE FILES ***************************************************************************** */ #include "typedef.h" #include "tw_amr.h" /* for enum Mode */ /* ***************************************************************************** * DEFINITION OF DATA TYPES ***************************************************************************** */ /* ***************************************************************************** * DECLARATION OF PROTOTYPES ***************************************************************************** */ /* ************************************************************************** * * Function : Bits2prm * Purpose : Retrieves the vector of encoder parameters from * the received serial bits in a frame. * Returns : void * ************************************************************************** */ void Bits2prm ( enum Mode mode, const Word16 bits[], /* input : serial bits (max 244) */ Word16 prm[] /* output: analysis parameters (max 57) */ ); #endif