view dev/gsm0611-silence-fr.c @ 478:936a08cc73ce

doc/AMR-library-API: describe the decoder
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 19 May 2024 21:32:31 +0000
parents e4ca04586118
children
line wrap: on
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/*
 * This program is meant to be run only once by the developer - it uses
 * libgsm function gsm_implode() to transform the idle frame of GSM 06.11
 * (3GPP TS 46.011) from the table format given in the spec into
 * libgsm/RTP format.
 *
 * Later update: this program has been reworked to use the local function
 * in pack_gsmfr_rtp.c instead of gsm_implode(), in order to eliminate
 * all build dependencies on old libgsm.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>

extern void gsmfr_pack_to_rtp(const int16_t *params, uint8_t *frame);

static const int16_t lar_params[8] = {42, 39, 21, 10, 9, 4, 3, 2};
static const int16_t subframe_params[17] =
	{40, 0, 1, 0,  3, 4, 3, 4, 4,  3, 3, 3, 3, 4, 4, 3, 3};

main(argc, argv)
	char **argv;
{
	int16_t params[76];
	uint8_t frame[33];
	unsigned n;

	/* gather params */
	bcopy(lar_params, params, sizeof(int16_t) * 8);
	bcopy(subframe_params, params + 8, sizeof(int16_t) * 17);
	bcopy(subframe_params, params + 25, sizeof(int16_t) * 17);
	bcopy(subframe_params, params + 42, sizeof(int16_t) * 17);
	bcopy(subframe_params, params + 59, sizeof(int16_t) * 17);
	/* generate frame */
	gsmfr_pack_to_rtp(params, frame);
	/* print the frame */
	for (n = 0; n < 33; n++) {
		printf("0x%02X,", frame[n]);
		if (n == 4 || n == 11 || n == 18 || n == 25 || n == 32)
			putchar('\n');
		else
			putchar(' ');
	}
	exit(0);
}