Initial NXDN Type D - 'IDAS' Support; #115
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lwvmobile
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4a8bf144dd
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5e24ff505d
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@ -45,6 +45,12 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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int sr_structure;
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int sr_ran;
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//new, and even more confusing NXDN Type-D / "IDAS" acronyms
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int idas = 0;
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int scch = 0;
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int facch3 = 0;
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int udch2 = 0;
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uint8_t lich_dibits[8];
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uint8_t sacch_bits[60];
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uint8_t facch_bits_a[144];
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@ -83,10 +89,8 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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lich = lich >> 1;
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if (lich_parity_received != lich_parity_computed)
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{
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// fprintf(stderr, "NXDN lich parity error, ignoring frame \n"); //debug
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// state->lastsynctype = -1; //set to -1 so we don't jump back here too quickly
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goto END;
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// return;
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}
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voice = 0;
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@ -117,15 +121,12 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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case 0x49:
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case 0x4e:
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case 0x4f:
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case 0x69:
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case 0x6f:
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facch2 = 1;
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break;
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case 0x32: //facch in 1, vch in 2
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case 0x33:
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case 0x52:
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case 0x53:
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case 0x73:
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voice = 2;
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facch = 1;
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sacch = 1;
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@ -134,7 +135,6 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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case 0x35:
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case 0x54:
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case 0x55:
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case 0x75:
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voice = 1;
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facch = 2;
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sacch = 1;
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@ -143,7 +143,6 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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case 0x37:
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case 0x56:
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case 0x57:
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case 0x77:
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voice = 3;
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facch = 0;
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sacch = 1;
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@ -156,8 +155,7 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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case 0x41:
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case 0x50:
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case 0x51:
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case 0x61:
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case 0x71:
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voice = 0;
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facch = 3;
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sacch = 1;
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@ -166,6 +164,54 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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case 0x39:
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sacch = 1;
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break;
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//NXDN "Type-D" or "IDAS" Specific Lich Codes
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case 0x76: //normal voice (in one and two)
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case 0x77:
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idas = 1;
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scch = 1;
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voice = 3;
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break;
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case 0x74: //vch in 1, scch in 2 (scch 2 steal)
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case 0x75:
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idas = 1;
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voice = 1;
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scch = 2;
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break;
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case 0x72: //scch in 1, vch in 2 (scch 1 steal)
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case 0x73:
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idas = 1;
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voice = 2;
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scch = 2;
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break;
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case 0x70: //scch in 1 and 2
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case 0x71:
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idas = 1;
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scch = 4; //total of three scch positions
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break;
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case 0x6E: //udch2
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case 0x6F:
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idas = 1;
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udch2 = 1;
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break;
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case 0x68:
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case 0x69: //facch3
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idas = 1;
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facch3 = 1;
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break;
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case 0x62:
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case 0x63: //facch1 in 1, n/post in 2
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idas = 1;
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scch = 1;
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facch = 1;
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break;
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case 0x60:
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case 0x61: //facch1 in both
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idas = 1;
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scch = 1;
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facch = 3;
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break;
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default:
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if (opts->payload == 1) fprintf(stderr, " false sync or unsupported NXDN lich type 0x%02X\n", lich);
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//reset the sacch field, we probably got a false sync and need to wipe or give a bad crc
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@ -178,10 +224,16 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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} // end of switch(lich)
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//printframesync after determining we have a good lich and it has something in it
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if (voice || facch || sacch || facch2 || cac)
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if (idas)
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{
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if (opts->frame_nxdn48 == 1)
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{
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printFrameSync (opts, state, "IDAS D ", 0, "-");
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}
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if (opts->payload == 1) fprintf (stderr, "L%02X -", lich);
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}
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else if (voice || facch || sacch || facch2 || cac)
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{
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// if (state->synctype == 28) fprintf (stderr, " +");
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// else fprintf (stderr, " -");
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if (opts->frame_nxdn48 == 1)
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{
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printFrameSync (opts, state, "NXDN48 ", 0, "-");
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@ -234,7 +286,7 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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//vch frames stay inside dbuf, easier to assign that to ambe_fr frames
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//sacch needs extra handling depending on superframe or non-superframe variety
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if (voice && !facch) //voice only, no facch steal
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if (voice && !facch && scch < 2) //voice only, no facch/scch steal
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{
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fprintf (stderr, "%s", KGRN);
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fprintf (stderr, " Voice ");
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@ -246,6 +298,12 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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fprintf (stderr, " V%d+F%d ", 3 - facch, facch); //print which position on each
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fprintf (stderr, "%s", KNRM);
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}
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else if (voice && scch > 1) //voice with scch steal
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{
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fprintf (stderr, "%s", KGRN);
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fprintf (stderr, " V%d+S%d ", 4 - scch, scch); //print which position on each
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fprintf (stderr, "%s", KNRM);
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}
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else
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{
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fprintf (stderr, "%s", KCYN);
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@ -284,6 +342,18 @@ void nxdn_frame (dsd_opts * opts, dsd_state * state)
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if (lich == 0x20 || lich == 0x21 || lich == 0x61 || lich == 0x40 || lich == 0x41) state->nxdn_sacch_non_superframe = TRUE;
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else state->nxdn_sacch_non_superframe = FALSE;
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//TODO Later: Add Direction to all decoding functions
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uint8_t direction;
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if (lich % 2 == 0) direction = 0;
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else direction = 1;
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//TODO: SCCH handling -- direction will be needed
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if (scch) fprintf (stderr, " SCCH ");
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//TODO Much Later: FACCH3 and UDCH2 handling
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if (facch3) fprintf (stderr, " FACCH3 ");
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if (udch2) fprintf (stderr, " UDCH2 ");
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if (sacch) nxdn_deperm_sacch(opts, state, sacch_bits);
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if (cac) nxdn_deperm_cac(opts, state, cac_bits);
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if (facch2) nxdn_deperm_facch2_udch(opts, state, facch2_bits);
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