FreeCalypso > hg > gsm-codec-lib
view libtwamr/dhf_subst2.c @ 465:026bdc1f0dda
amrefr-tseq-enc: use the new DHF xform that matches T-Mobile
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 12 May 2024 21:43:35 +0000 |
parents | fa0652115168 |
children |
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/* * The function implemented in this module is an aid for AMR-EFR interworking; * it is meant to be invoked directly after amr_encode_frame(). It checks * the encoder output for MR122 DHF and turns it into EFR DHF just like * amr_dhf_subst_efr(), but only if the input PCM frame was an EHF. This * slightly more complicated logic is needed in order to replicate the observed * behavior of AMR-EFR speech encoder in the extant GSM network of T-Mobile USA. */ #include "tw_amr.h" #include "namespace.h" #include "e_homing.h" void amr_dhf_subst_efr2(struct amr_param_frame *frame, const int16_t *pcm) { if (encoder_homing_frame_test(pcm)) amr_dhf_subst_efr(frame); }