FreeCalypso > hg > vband-misc
view pcma2efr/gen160.c @ 28:4f47447fd17f
pcma2efr: starting with DHF check
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 13 May 2024 02:45:17 +0000 |
parents | pcmu2efr/gen160.c@f4420403219a |
children |
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/* * The code in this module generates 160 versions of linearized seqsynca, * shifted by one sample each, intended for feeding to EFR and AMR encoders. * * Update: the new version generates a linear array of 480 16-bit PCM samples, * where the first 160 are 0x0008, followed by two copies of linearized * seqsynca. */ #include <stdint.h> extern const uint8_t seqsynca_last_frame[160]; extern const uint16_t pcma_decode_table[256]; uint16_t linear_input_array[480]; void generate_linear_inputs(void) { unsigned n; uint16_t lin; for (n = 0; n < 160; n++) { lin = pcma_decode_table[seqsynca_last_frame[n]]; linear_input_array[n] = 0x0008; linear_input_array[160+n] = lin; linear_input_array[320+n] = lin; } }