FreeCalypso > hg > gsm-codec-lib

view libgsmefr/gsm_efr.h @ 585:3c6bf0d26ee7 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
TW-TS-005 reader: fix maximum line length bug TW-TS-005 section 4.1 states: The maximum allowed length of each line is 80 characters, not including the OS-specific newline encoding. The implementation of this line length limit in the TW-TS-005 hex file reader function in the present suite was wrong, such that lines of the full maximum length could not be read. Fix it. Note that this bug affects comment lines too, not just actual RTP payloads. Neither Annex A nor Annex B features an RTP payload format that goes to the maximum of 40 bytes, but if a comment line goes to the maximum allowed length of 80 characters not including the terminating newline, the bug will be triggered, necessitating the present fix.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Feb 2025 07:49:28 +0000
parents f2d0f2f15d5f
children
line wrap: on
line source

/*
 * 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);
extern int EFR_decode_rtp(struct EFR_decoder_state *st, const uint8_t *rtp_pl,
			  unsigned rtp_pl_len, 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];

/* sizes of state structures, to support alternative malloc schemes */

extern const unsigned EFR_encoder_state_size;
extern const unsigned EFR_decoder_state_size;

#endif	/* include guard */