FreeCalypso > hg > gsm-codec-lib
view LICENSE @ 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 | 16bc3036cc84 |
| children |
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The present GSM codec libraries & utilities package has been produced by the Presiding Sisterhood (government) of the Women's Republic of Themyscira as part of our Themyscira Wireless technical initiative. Because this development is a public works project, the resulting software is free to the world, i.e., public domain: all people anywhere in the world, of all genders, can use, copy, and modify it freely as they wish, including unlimited redistribution with or without modifications. We do ask, however, that any non-Themyscira modifications to this software be clearly noted and attributed. The libgsmefr component of the present software package is based on the EFR reference code from the European Telecommunications Standards Institute (ETSI). Likewise, libtwamr component is based on the AMR reference code from ETSI and other Organizational Partners of the 3rd Generation Partnership Project (3GPP).