FreeCalypso > hg > gsm-codec-lib
view libgsmfr2/pp_good.c @ 277:37dc5c84bbe9
dev: generate RTP-packed GSM-FR DHF
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 14 Apr 2024 04:00:02 +0000 |
parents | 573afa985df6 |
children |
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/* * In this module we implement preprocessing of received good frames. */ #include <stdint.h> #include <string.h> #include "tw_gsmfr.h" #include "pp_state.h" #include "pp_internal.h" void gsmfr_preproc_good_frame(struct gsmfr_preproc_state *st, uint8_t *frame) { int sid; /* always set correct magic */ frame[0] = 0xD0 | frame[0] & 0x0F; /* now classify by SID */ sid = gsmfr_preproc_sid_classify(frame); switch (sid) { case 0: /* good speech frame */ st->rx_state = SPEECH; memcpy(&st->speech_frame, frame, GSMFR_RTP_FRAME_LEN); return; case 1: /* invalid SID frame */ /* state-dependent handling, similar to BFI */ gsmfr_preproc_invalid_sid(st, frame); return; case 2: /* valid SID frame */ st->rx_state = COMFORT_NOISE; gsmfr_preproc_sid2cn(st, frame); return; } }