FreeCalypso > hg > gsm-codec-lib
view libtwamr/e_homing.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 | 2a094af3d384 |
| children |
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/* ***************************************************************************** * * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 * R99 Version 3.3.0 * REL-4 Version 4.1.0 * ***************************************************************************** * * File : e_homing.c * ***************************************************************************** */ /* ***************************************************************************** * MODULE INCLUDE FILE AND VERSION ID ***************************************************************************** */ #include "namespace.h" #include "e_homing.h" /* ***************************************************************************** * INCLUDE FILES ***************************************************************************** */ #include "typedef.h" #include "cnst.h" /* ***************************************************************************** * PUBLIC PROGRAM CODE ***************************************************************************** */ /* ******************************************************************************** * * Function : encoder_homing_frame_test * In : input_frame[] one frame of speech samples * Out : none * Calls : none * Tables : none * Compile Defines : none * Return : 0 input frame does not match the encoder homing frame pattern * 1 input frame matches the encoder homing frame pattern * Information : Checks if all samples of the input frame matches the encoder * homing frame pattern, which is 0x0008 for all samples. * ******************************************************************************** */ Word16 encoder_homing_frame_test (const Word16 input_frame[]) { Word16 i, j; /* check 160 input samples for matching EHF_MASK: defined in e_homing.h */ for (i = 0; i < L_FRAME; i++) { j = input_frame[i] ^ EHF_MASK; if (j) break; } return !j; }