FreeCalypso > hg > gsm-codec-lib
view libgsmefr/gsm_efr.h @ 498:65f672c43dc8
libgsmhr1/typedefs.h: import original
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 19 Jun 2024 00:49:48 +0000 |
parents | ea89eb8291bf |
children |
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/* * This header file is the external public interface to libgsmefr: * Themyscira Wireless implementation of GSM-EFR speech codec * based on the original ETSI code of GSM 06.53, adapted to the * RTP frame format of ETSI TS 101 318. * * This header file should be installed in some system include directory * such that it can be included by C sources as <gsm_efr.h>. */ #ifndef __GSM_EFR_H #define __GSM_EFR_H #include <stdint.h> #define EFR_RTP_FRAME_LEN 31 #define EFR_NUM_PARAMS 57 struct EFR_encoder_state; /* opaque to external users */ struct EFR_decoder_state; /* ditto */ extern struct EFR_encoder_state *EFR_encoder_create(int dtx); extern struct EFR_decoder_state *EFR_decoder_create(void); /* use standard free() call to free both afterward */ /* reset state to initial */ extern void EFR_encoder_reset(struct EFR_encoder_state *st, int dtx); extern void EFR_decoder_reset(struct EFR_decoder_state *st); /* encoder public functions */ extern void EFR_encode_params(struct EFR_encoder_state *st, const int16_t *pcm, int16_t *params, int *sp, int *vad); extern void EFR_encode_frame(struct EFR_encoder_state *st, const int16_t *pcm, uint8_t *frame, int *sp, int *vad); /* decoder public functions */ extern void EFR_decode_params(struct EFR_decoder_state *st, const int16_t *params, int bfi, int sid, int taf, int16_t *pcm); extern void EFR_decode_frame(struct EFR_decoder_state *st, const uint8_t *frame, int bfi, int taf, int16_t *pcm); extern void EFR_decode_bfi_nodata(struct EFR_decoder_state *st, int taf, int16_t *pcm); /* stateless utility functions */ extern int EFR_sid_classify(const uint8_t *frame); extern void EFR_frame2params(const uint8_t *frame, int16_t *params); extern void EFR_params2frame(const int16_t *params, uint8_t *frame); extern void EFR_insert_sid_codeword(uint8_t *frame); /* public const data item */ extern const uint8_t EFR_decoder_homing_frame[EFR_RTP_FRAME_LEN]; #endif /* include guard */