FreeCalypso > hg > gsm-codec-lib
view libgsmfr2/pp_state.c @ 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 | 573afa985df6 |
children |
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/* * In this module we implement allocation and initialization * of state structures for our GSM FR preprocessor. */ #include <stdint.h> #include <stdlib.h> #include <string.h> #include "tw_gsmfr.h" #include "pp_state.h" struct gsmfr_preproc_state *gsmfr_preproc_create(void) { struct gsmfr_preproc_state *st; st = malloc(sizeof(struct gsmfr_preproc_state)); if (st) gsmfr_preproc_reset(st); return st; } void gsmfr_preproc_reset(struct gsmfr_preproc_state *st) { memset(st, 0, sizeof(struct gsmfr_preproc_state)); st->cn_random_lfsr = PN_INITIAL_SEED; }