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comparison rtp-gsmfr-extr.c @ 2:210dfa39f573

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rtp-gsmfr-extr: support new TRAUlike RTP payload format
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 16 Apr 2023 04:18:14 +0000
parents 05ff0f7ac977
children
comparison
equal deleted inserted replaced
1:41eba040785a 2:210dfa39f573
95 process_packet(pkt, caplen, pkt_idx) 95 process_packet(pkt, caplen, pkt_idx)
96 u_char *pkt; 96 u_char *pkt;
97 unsigned caplen, pkt_idx; 97 unsigned caplen, pkt_idx;
98 { 98 {
99 unsigned udplen, payload_len; 99 unsigned udplen, payload_len;
100 u_char synth_bfi[2];
100 101
101 if (caplen < link_hdr_len + 28) 102 if (caplen < link_hdr_len + 28)
102 return; 103 return;
103 if (link_hdr_len) { 104 if (link_hdr_len) {
104 if (pkt[ethertype_offset] != 0x08) 105 if (pkt[ethertype_offset] != 0x08)
139 exit(1); 140 exit(1);
140 } 141 }
141 rtp_stream_logic(pkt + 28, pkt_idx); 142 rtp_stream_logic(pkt + 28, pkt_idx);
142 payload_len = udplen - 20; 143 payload_len = udplen - 20;
143 switch (payload_len) { 144 switch (payload_len) {
145 case 0:
146 synth_bfi[0] = 0xBF;
147 synth_bfi[1] = 0;
148 emit_synth_bfi:
149 fwrite(synth_bfi, 1, 2, outfile);
150 return;
151 case 1:
152 if ((pkt[40] & 0xF6) != 0xE6)
153 break;
154 traulike_bfi:
155 synth_bfi[0] = 0xBF;
156 synth_bfi[1] = pkt[40] & 1;
157 goto emit_synth_bfi;
144 case 2: 158 case 2:
145 if (pkt[40] == 0xBF) 159 if (pkt[40] != 0xBF)
146 break; 160 break;
147 goto bad_payload; 161 emit_payload:
162 fwrite(pkt + 40, 1, payload_len, outfile);
163 return;
148 case 31: 164 case 31:
149 if ((pkt[40] & 0xF0) == 0xC0) 165 if ((pkt[40] & 0xF0) != 0xC0)
150 break; 166 break;
151 goto bad_payload; 167 goto emit_payload;
168 case 32:
169 if ((pkt[40] & 0xF4) != 0xE0)
170 break;
171 if ((pkt[41] & 0xF0) != 0xC0)
172 break;
173 if (pkt[40] & 2)
174 goto traulike_bfi;
175 fwrite(pkt + 41, 1, 31, outfile);
176 return;
152 case 33: 177 case 33:
153 if ((pkt[40] & 0xF0) == 0xD0) 178 if ((pkt[40] & 0xF0) != 0xD0)
154 break; 179 break;
155 /* FALL THRU */ 180 goto emit_payload;
156 default: 181 case 34:
157 bad_payload: 182 if ((pkt[40] & 0xF4) != 0xE0)
158 fprintf(stderr, "error in packet #%u: unsupported payload\n", 183 break;
159 pkt_idx); 184 if ((pkt[41] & 0xF0) != 0xD0)
160 exit(1); 185 break;
161 } 186 if (pkt[40] & 2)
162 fwrite(pkt + 40, 1, payload_len, outfile); 187 goto traulike_bfi;
188 fwrite(pkt + 41, 1, 33, outfile);
189 return;
190 }
191 fprintf(stderr, "error in packet #%u: unsupported payload\n", pkt_idx);
192 exit(1);
163 } 193 }
164 194
165 main(argc, argv) 195 main(argc, argv)
166 char **argv; 196 char **argv;
167 { 197 {