static switch_status_t switch_g726_destroy(switch_codec_t *codec)
{
g726_state_t *context = codec->private_info;
if (!context) {
return SWITCH_STATUS_FALSE;
}
g726_free(context);
codec->private_info = NULL;
return SWITCH_STATUS_SUCCESS;
}
int main(int argc, char *argv[])
{
g726_state_t *enc_state;
g726_state_t *dec_state;
int opt;
int itutests;
int bit_rate;
SNDFILE *inhandle;
SNDFILE *outhandle;
int16_t amp[1024];
int frames;
int adpcm;
int packing;
bit_rate = 32000;
itutests = true;
packing = G726_PACKING_NONE;
while ((opt = getopt(argc, argv, "b:LR")) != -1)
{
switch (opt)
{
case 'b':
bit_rate = atoi(optarg);
if (bit_rate != 16000 && bit_rate != 24000 && bit_rate != 32000 && bit_rate != 40000)
{
fprintf(stderr, "Invalid bit rate selected. Only 16000, 24000, 32000 and 40000 are valid.\n");
exit(2);
}
itutests = false;
break;
case 'L':
packing = G726_PACKING_LEFT;
break;
case 'R':
packing = G726_PACKING_RIGHT;
break;
default:
//usage();
exit(2);
}
}
if (itutests)
{
itu_compliance_tests();
}
else
{
if ((inhandle = sf_open_telephony_read(IN_FILE_NAME, 1)) == NULL)
{
fprintf(stderr, " Cannot open audio file '%s'\n", IN_FILE_NAME);
exit(2);
}
if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME, 1)) == NULL)
{
fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME);
exit(2);
}
printf("ADPCM packing is %d\n", packing);
enc_state = g726_init(NULL, bit_rate, G726_ENCODING_LINEAR, packing);
dec_state = g726_init(NULL, bit_rate, G726_ENCODING_LINEAR, packing);
while ((frames = sf_readf_short(inhandle, amp, 159)))
{
adpcm = g726_encode(enc_state, adpcmdata, amp, frames);
frames = g726_decode(dec_state, amp, adpcmdata, adpcm);
sf_writef_short(outhandle, amp, frames);
}
if (sf_close_telephony(inhandle))
{
printf(" Cannot close audio file '%s'\n", IN_FILE_NAME);
exit(2);
}
if (sf_close_telephony(outhandle))
{
printf(" Cannot close audio file '%s'\n", OUT_FILE_NAME);
exit(2);
}
printf("'%s' transcoded to '%s' at %dbps.\n", IN_FILE_NAME, OUT_FILE_NAME, bit_rate);
g726_free(enc_state);
g726_free(dec_state);
}
return 0;
}