FreeCalypso > hg > gsm-codec-lib
annotate libgsmefr/dtx_defs.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> |
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date | Sat, 18 May 2024 22:30:42 +0000 |
parents | c1d53064b410 |
children |
rev | line source |
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119
c1d53064b410
libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
67
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1 /* |
c1d53064b410
libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
67
diff
changeset
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2 * The definitions contained in this header file originally lived in |
c1d53064b410
libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
67
diff
changeset
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3 * dtx.c; they are being factored out into a new header file as part of |
c1d53064b410
libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
67
diff
changeset
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4 * splitting of dtx.c code into common, encoder-only and decoder-only |
c1d53064b410
libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
67
diff
changeset
|
5 * parts. |
c1d53064b410
libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
67
diff
changeset
|
6 */ |
66
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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7 |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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8 /* Inverse values of DTX hangover period and DTX hangover period + 1 */ |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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9 |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
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10 #define INV_DTX_HANGOVER (0x7fff / DTX_HANGOVER) |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
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11 #define INV_DTX_HANGOVER_P1 (0x7fff / (DTX_HANGOVER+1)) |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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12 |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 #define NB_PULSE 10 /* Number of pulses in fixed codebook excitation */ |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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14 |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 /* Constant DTX_ELAPSED_THRESHOLD is used as threshold for allowing |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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16 SID frame updating without hangover period in case when elapsed |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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17 time measured from previous SID update is below 24 */ |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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18 |
824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
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19 #define DTX_ELAPSED_THRESHOLD (24 + DTX_HANGOVER - 1) |