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annotate libgsmefr/cnst.h @ 477:4c9222d95647

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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 f9c9dd458d55
children
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36e1363ad885 libgsmefr: initial import of ETSI header files
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1 /*--------------------------------------------------------------------------*
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2 * Codec constant parameters (coder, decoder, and postfilter) *
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3 *---------------------------------------------------------------------------*/
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5 #define L_TOTAL 320 /* Total size of speech buffer. */
36e1363ad885 libgsmefr: initial import of ETSI header files
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6 #define L_WINDOW 240 /* Window size in LP analysis */
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7 #define L_FRAME 160 /* Frame size */
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8 #define L_FRAME_BY2 80 /* Frame size divided by 2 */
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9 #define L_SUBFR 40 /* Subframe size */
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10 #define M 10 /* Order of LP filter */
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11 #define MP1 (M+1) /* Order of LP filter + 1 */
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12 #define AZ_SIZE (4*M+4) /* Size of array of LP filters in 4 subfr.s */
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13 #define PIT_MIN 18 /* Minimum pitch lag */
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14 #define PIT_MAX 143 /* Maximum pitch lag */
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15 #define L_INTERPOL (10+1) /* Length of filter for interpolation */
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17 #define PRM_SIZE 57 /* Size of vector of analysis parameters */
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19 #define MU 26214 /* Factor for tilt compensation filter 0.8 */
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20 #define AGC_FAC 29491 /* Factor for automatic gain control 0.9 */
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9ae58ffb4197 libgsmefr/cnst.h: add DTX_HANGOVER definition,
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22 #define DTX_HANGOVER 7 /* Period when SP=1 although VAD=0.
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23 Used for comfort noise averaging */