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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 16bc3036cc84
children
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Mychaela Falconia <falcon@freecalypso.org>
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1 The present GSM codec libraries & utilities package has been produced by the
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Mychaela Falconia <falcon@freecalypso.org>
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2 Presiding Sisterhood (government) of the Women's Republic of Themyscira as part
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Mychaela Falconia <falcon@freecalypso.org>
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3 of our Themyscira Wireless technical initiative. Because this development is a
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Mychaela Falconia <falcon@freecalypso.org>
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4 public works project, the resulting software is free to the world, i.e., public
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Mychaela Falconia <falcon@freecalypso.org>
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5 domain: all people anywhere in the world, of all genders, can use, copy, and
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Mychaela Falconia <falcon@freecalypso.org>
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6 modify it freely as they wish, including unlimited redistribution with or
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Mychaela Falconia <falcon@freecalypso.org>
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7 without modifications. We do ask, however, that any non-Themyscira
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Mychaela Falconia <falcon@freecalypso.org>
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8 modifications to this software be clearly noted and attributed.
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9
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10 The libgsmefr component of the present software package is based on the EFR
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11 reference code from the European Telecommunications Standards Institute (ETSI).
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12 Likewise, libtwamr component is based on the AMR reference code from ETSI and
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13 other Organizational Partners of the 3rd Generation Partnership Project (3GPP).