FreeCalypso > hg > gsm-codec-lib
view libgsmefr/frame2params.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 | 4ae1dd43e332 |
children |
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/* * In this module we implement our EFR_frame2params() unpacking function. */ #include "gsm_efr.h" void EFR_frame2params(const uint8_t *frame, int16_t *params) { const uint8_t *c = frame; /* EFR_MAGIC = (*c >> 4) & 0xF; */ params[0] = (*c++ & 0xF) << 3; params[0] |= (*c >> 5) & 0x7; params[1] = (*c++ & 0x1F) << 3; params[1] |= (*c >> 5) & 0x7; params[2] = (*c++ & 0x1F) << 4; params[2] |= (*c >> 4) & 0xF; params[3] = (*c++ & 0xF) << 4; params[3] |= (*c >> 4) & 0xF; params[4] = (*c++ & 0xF) << 2; params[4] |= (*c >> 6) & 0x3; params[5] = (*c++ & 0x3F) << 3; params[5] |= (*c >> 5) & 0x7; params[6] = (*c >> 1) & 0xF; params[7] = (*c++ & 0x1) << 3; params[7] |= (*c >> 5) & 0x7; params[8] = (*c >> 1) & 0xF; params[9] = (*c++ & 0x1) << 3; params[9] |= (*c >> 5) & 0x7; params[10] = (*c >> 1) & 0xF; params[11] = (*c++ & 0x1) << 3; params[11] |= (*c >> 5) & 0x7; params[12] = (*c >> 2) & 0x7; params[13] = (*c++ & 0x3) << 1; params[13] |= (*c >> 7) & 0x1; params[14] = (*c >> 4) & 0x7; params[15] = (*c >> 1) & 0x7; params[16] = (*c++ & 0x1) << 2; params[16] |= (*c >> 6) & 0x3; params[17] = (*c >> 1) & 0x1F; params[18] = (*c++ & 0x1) << 5; params[18] |= (*c >> 3) & 0x1F; params[19] = (*c++ & 0x7) << 1; params[19] |= (*c >> 7) & 0x1; params[20] = (*c >> 3) & 0xF; params[21] = (*c++ & 0x7) << 1; params[21] |= (*c >> 7) & 0x1; params[22] = (*c >> 3) & 0xF; params[23] = (*c++ & 0x7) << 1; params[23] |= (*c >> 7) & 0x1; params[24] = (*c >> 3) & 0xF; params[25] = *c++ & 0x7; params[26] = (*c >> 5) & 0x7; params[27] = (*c >> 2) & 0x7; params[28] = (*c++ & 0x3) << 1; params[28] |= (*c >> 7) & 0x1; params[29] = (*c >> 4) & 0x7; params[30] = (*c++ & 0xF) << 1; params[30] |= (*c >> 7) & 0x1; params[31] = (*c++ & 0x7F) << 2; params[31] |= (*c >> 6) & 0x3; params[32] = (*c >> 2) & 0xF; params[33] = (*c++ & 0x3) << 2; params[33] |= (*c >> 6) & 0x3; params[34] = (*c >> 2) & 0xF; params[35] = (*c++ & 0x3) << 2; params[35] |= (*c >> 6) & 0x3; params[36] = (*c >> 2) & 0xF; params[37] = (*c++ & 0x3) << 2; params[37] |= (*c >> 6) & 0x3; params[38] = (*c >> 3) & 0x7; params[39] = *c++ & 0x7; params[40] = (*c >> 5) & 0x7; params[41] = (*c >> 2) & 0x7; params[42] = (*c++ & 0x3) << 1; params[42] |= (*c >> 7) & 0x1; params[43] = (*c >> 2) & 0x1F; params[44] = (*c++ & 0x3) << 4; params[44] |= (*c >> 4) & 0xF; params[45] = *c++ & 0xF; params[46] = (*c >> 4) & 0xF; params[47] = *c++ & 0xF; params[48] = (*c >> 4) & 0xF; params[49] = *c++ & 0xF; params[50] = (*c >> 4) & 0xF; params[51] = (*c >> 1) & 0x7; params[52] = (*c++ & 0x1) << 2; params[52] |= (*c >> 6) & 0x3; params[53] = (*c >> 3) & 0x7; params[54] = *c++ & 0x7; params[55] = (*c >> 5) & 0x7; params[56] = *c++ & 0x1F; }