FreeCalypso > hg > gsm-codec-lib
view libgsmfr2/pp_state.h @ 282:9ee8ad3d4d30
frtest: rm gsmfr-hand-test and gsmfr-max-out utils
These hack programs were never properly documented and were written
only as part of a debug chase, in pursuit of a bug that ultimately
turned out to be in our then-hacky patch to osmo-bts-sysmo,
before beginning of proper patches in Osmocom. These hack programs
need to be dropped from the present sw package because they depend
on old libgsm, and we are eliminating that dependency.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 14 Apr 2024 05:44:47 +0000 |
parents | 573afa985df6 |
children | 96c4ed5529bf |
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/* * This header file is internal to libgsmfr2; * here we define our state structure for the Rx DTX preprocessor component. */ enum rx_dtx_st { NO_DATA = 0, SPEECH, SPEECH_MUTING, COMFORT_NOISE, LOST_SID, CN_MUTING, }; struct gsmfr_preproc_state { enum rx_dtx_st rx_state; uint8_t speech_frame[GSMFR_RTP_FRAME_LEN]; uint8_t sid_prefix[5]; uint8_t sid_xmaxc; uint32_t cn_random_lfsr; unsigned cn_random_6fold; }; /* we use the same LFSR PRNG for CN as ETSI EFR implementation */ #define PN_INITIAL_SEED 0x70816958L /* Pseudo noise generator seed value */