mirror of https://gerrit.osmocom.org/gapk
146 lines
3.0 KiB
C
146 lines
3.0 KiB
C
/* HR (GSM 06.20) codec wrapper */
|
|
|
|
/*
|
|
* This file is part of gapk (GSM Audio Pocket Knife).
|
|
*
|
|
* gapk is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* gapk is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with gapk. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <dlfcn.h>
|
|
|
|
#include <gsmhr/gsmhr.h>
|
|
|
|
#include "refsrc/typedefs.h"
|
|
#include "refsrc/homing.h"
|
|
#include "refsrc/sp_dec.h"
|
|
#include "refsrc/sp_enc.h"
|
|
|
|
|
|
#define EXPORT __attribute__((visibility("default")))
|
|
|
|
|
|
struct gsmhr {
|
|
int dec_reset_flg;
|
|
|
|
void *bss_base;
|
|
void *bss_save;
|
|
unsigned bss_len;
|
|
};
|
|
|
|
EXPORT struct gsmhr *
|
|
gsmhr_init(void)
|
|
{
|
|
struct gsmhr *state;
|
|
void *lib;
|
|
|
|
lib = dlopen("libgsmhr.so.0", RTLD_NOW | RTLD_NOLOAD);
|
|
if (!lib)
|
|
return NULL;
|
|
|
|
state = calloc(1, sizeof(struct gsmhr));
|
|
if (!state)
|
|
return NULL;
|
|
|
|
state->dec_reset_flg = 1;
|
|
|
|
state->bss_base = dlsym(lib, "__bss_start");
|
|
state->bss_len = dlsym(lib, "_end") - state->bss_base;
|
|
state->bss_save = malloc(state->bss_len);
|
|
|
|
if (!state->bss_save)
|
|
{
|
|
free(state);
|
|
return NULL;
|
|
}
|
|
|
|
resetDec();
|
|
resetEnc();
|
|
|
|
memcpy(state->bss_save, state->bss_base, state->bss_len);
|
|
|
|
return state;
|
|
}
|
|
|
|
EXPORT void
|
|
gsmhr_exit(struct gsmhr *state)
|
|
{
|
|
free(state->bss_save);
|
|
free(state);
|
|
}
|
|
|
|
EXPORT int
|
|
gsmhr_encode(struct gsmhr *state, int16_t *hr_params, const int16_t *pcm)
|
|
{
|
|
int enc_reset_flg;
|
|
Shortword pcm_b[F_LEN];
|
|
|
|
memcpy(state->bss_base, state->bss_save, state->bss_len);
|
|
|
|
memcpy(pcm_b, pcm, F_LEN*sizeof(int16_t));
|
|
|
|
enc_reset_flg = encoderHomingFrameTest(pcm_b);
|
|
|
|
speechEncoder(pcm_b, hr_params);
|
|
|
|
if (enc_reset_flg)
|
|
resetEnc();
|
|
|
|
memcpy(state->bss_save, state->bss_base, state->bss_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
EXPORT int
|
|
gsmhr_decode(struct gsmhr *state, int16_t *pcm, const int16_t *hr_params)
|
|
{
|
|
#define WHOLE_FRAME 18
|
|
#define TO_FIRST_SUBFRAME 9
|
|
|
|
int dec_reset_flg;
|
|
Shortword hr_params_b[22];
|
|
|
|
memcpy(state->bss_base, state->bss_save, state->bss_len);
|
|
|
|
memcpy(hr_params_b, hr_params, 22*sizeof(int16_t));
|
|
|
|
if (state->dec_reset_flg)
|
|
dec_reset_flg = decoderHomingFrameTest(hr_params_b, TO_FIRST_SUBFRAME);
|
|
else
|
|
dec_reset_flg = 0;
|
|
|
|
if (dec_reset_flg && state->dec_reset_flg) {
|
|
int i;
|
|
for (i=0; i<F_LEN; i++)
|
|
pcm[i] = EHF_MASK;
|
|
} else {
|
|
speechDecoder(hr_params_b, pcm);
|
|
}
|
|
|
|
if (!state->dec_reset_flg)
|
|
dec_reset_flg = decoderHomingFrameTest(hr_params_b, WHOLE_FRAME);
|
|
|
|
if (dec_reset_flg)
|
|
resetDec();
|
|
|
|
state->dec_reset_flg = dec_reset_flg;
|
|
|
|
memcpy(state->bss_save, state->bss_base, state->bss_len);
|
|
|
|
return 0;
|
|
}
|