/*! \brief return pointer to global buffer containing a TRAU idle frame
*/
uint8_t *trau_idle_frame(void)
{
/* only initialize during the first call */
if (!dbits_initted) {
/* set all D-bits to 1 */
memset(&fr_idle_frame.d_bits, 0x01, 260);
memset(&fr_idle_frame.c_bits, 0x01, 25); /* spare are set to 1 */
/* set Downlink Idle Speech Frame pattern */
fr_idle_frame.c_bits[0] = 0; /* C1 */
fr_idle_frame.c_bits[1] = 1; /* C2 */
fr_idle_frame.c_bits[2] = 1; /* C3 */
fr_idle_frame.c_bits[3] = 1; /* C4 */
fr_idle_frame.c_bits[4] = 0; /* C5 */
/* set no Time Alignment pattern */
fr_idle_frame.c_bits[5] = 0; /* C6 */
fr_idle_frame.c_bits[6] = 0; /* C7 */
fr_idle_frame.c_bits[7] = 0; /* C8 */
fr_idle_frame.c_bits[8] = 0; /* C9 */
fr_idle_frame.c_bits[9] = 0; /* C10 */
fr_idle_frame.c_bits[10] = 0; /* C11 */
/* already set to 1, but maybe we need to modify it in the future */
fr_idle_frame.c_bits[11] = 1; /* C12 (UFE), good frame */
fr_idle_frame.c_bits[15] = 1; /* C16 (SP), no DTX */
encode_fr(encoded_idle_frame, &fr_idle_frame);
dbits_initted = 1; /* set it to 1 to not call it again */
}
return encoded_idle_frame;
}
int encode_trau_frame(uint8_t *trau_bits, const struct decoded_trau_frame *fr)
{
uint8_t cbits5 = get_bits(fr->c_bits, 0, 5);
/* 16 bits of sync header */
memset(trau_bits, 0, 16);
switch (cbits5) {
case TRAU_FT_FR_UP:
case TRAU_FT_FR_DOWN:
case TRAU_FT_IDLE_UP:
case TRAU_FT_IDLE_DOWN:
case TRAU_FT_EFR:
encode_fr(trau_bits, fr);
break;
case TRAU_FT_AMR:
case TRAU_FT_OM_UP:
case TRAU_FT_OM_DOWN:
case TRAU_FT_DATA_UP:
case TRAU_FT_DATA_DOWN:
case TRAU_FT_D145_SYNC:
case TRAU_FT_EDATA:
LOGP(DMUX, LOGL_NOTICE, "unimplemented TRAU Frame Type "
"0x%02x\n", cbits5);
return -1;
break;
default:
LOGP(DMUX, LOGL_NOTICE, "unknown TRAU Frame Type "
"0x%02x\n", cbits5);
return -1;
break;
}
return 0;
}
uint8_t *trau_idle_frame(void)
{
/* only initialize during the first call */
if (!dbits_initted) {
/* set all D-bits to 1 */
memset(&fr_idle_frame.d_bits, 0x01, 260);
encode_fr(encoded_idle_frame, &fr_idle_frame);
}
return encoded_idle_frame;
}
