FreeCalypso > hg > gsm-codec-lib
view libtwamr/sid_sync.h @ 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 | a8b73b1c5b19 |
| 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 : sid_sync.h * Purpose : To ensure that the mode only switches to a * neighbouring mode * ***************************************************************************** */ #ifndef sid_sync_h #define sid_sync_h "$Id $" /* ***************************************************************************** * INCLUDE FILES ***************************************************************************** */ #include "tw_amr.h" #include "typedef.h" /* ****************************************************************************** * CONSTANTS ****************************************************************************** */ /* ****************************************************************************** * DEFINITION OF DATA TYPES ****************************************************************************** */ typedef struct { Word16 sid_update_rate; /* Send SID Update every sid_update_rate frame */ Word16 sid_update_counter; /* Number of frames since last SID */ Word16 sid_handover_debt; /* Number of extra SID_UPD frames to schedule*/ enum TXFrameType prev_ft; } sid_syncState; /* ***************************************************************************** * LOCAL VARIABLES AND TABLES ***************************************************************************** */ /* ***************************************************************************** * DECLARATION OF PROTOTYPES ***************************************************************************** */ void sid_sync_reset (sid_syncState *st); /* reset of sid_sync module (i.e. set state memory to zero) returns 0 on success */ int sid_sync_set_handover_debt (sid_syncState *st, /* i/o: sid_sync state */ Word16 debtFrames); /* update handover debt debtFrames extra SID_UPD are scheduled . to update remote decoder CNI states, right after an handover. (primarily for use on MS UL side ) */ void sid_sync(sid_syncState *st , /* i/o: sid_sync state */ enum Mode mode, enum TXFrameType *tx_frame_type); #endif