FreeCalypso > hg > gsm-codec-lib

annotate libgsmefr/gsm_efr.h @ 210:7e490a8efe8a

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doc/Binary-file-format: document BFI marker format
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 16 Apr 2023 19:00:46 +0000
parents 88468d5b3590
children 9499d12d315b
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1 /*
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2 * This header file is the external public interface to libgsmefr;
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3 * it should be installed in the same system include directory
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4 * as <gsm.h> and <gsm_fr_preproc.h> for the older FR codec.
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5 */
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7 #ifndef __GSM_EFR_H
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8 #define __GSM_EFR_H
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10 #include <stdint.h>
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12 #define EFR_RTP_FRAME_LEN 31
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13 #define EFR_NUM_PARAMS 57
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15 struct EFR_encoder_state; /* opaque to external users */
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16 struct EFR_decoder_state; /* ditto */
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18 extern struct EFR_encoder_state *EFR_encoder_create(int dtx);
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19 extern struct EFR_decoder_state *EFR_decoder_create(void);
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20 /* use standard free() call to free both afterward */
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22 /* reset state to initial */
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23 extern void EFR_encoder_reset(struct EFR_encoder_state *st, int dtx);
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24 extern void EFR_decoder_reset(struct EFR_decoder_state *st);
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26 /* encoder public functions */
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28 extern void EFR_encode_params(struct EFR_encoder_state *st, const int16_t *pcm,
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29 int16_t *params, int *sp, int *vad);
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30 extern void EFR_encode_frame(struct EFR_encoder_state *st, const int16_t *pcm,
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31 uint8_t *frame, int *sp, int *vad);
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33 /* decoder public functions */
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35 extern void EFR_decode_params(struct EFR_decoder_state *st,
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36 const int16_t *params, int bfi, int sid, int taf,
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37 int16_t *pcm);
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38 extern void EFR_decode_frame(struct EFR_decoder_state *st, const uint8_t *frame,
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39 int bfi, int taf, int16_t *pcm);
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40 extern void EFR_decode_bfi_nodata(struct EFR_decoder_state *st, int taf,
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41 int16_t *pcm);
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43 /* stateless utility functions */
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45 extern int EFR_sid_classify(const uint8_t *frame);
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46 extern void EFR_frame2params(const uint8_t *frame, int16_t *params);
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47 extern void EFR_params2frame(const int16_t *params, uint8_t *frame);
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48 extern void EFR_insert_sid_codeword(uint8_t *frame);
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50 #endif /* include guard */