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authorMatthias P. Braendli <matthias.braendli@mpb.li>2016-09-02 17:43:32 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2016-09-07 21:20:24 +0200
commit4809f3c042a99a639542b1e6cd22657871113260 (patch)
treedc0ec0f256eaceb79d63daa09591d4a6ef08cb73 /src/fig0_2.cpp
parent5542c8ecff635f9abc05b6b2ff255db02c2c9c46 (diff)
downloadetisnoop-4809f3c042a99a639542b1e6cd22657871113260.tar.gz
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+/*
+ Copyright (C) 2014 CSP Innovazione nelle ICT s.c.a r.l. (http://www.csp.it/)
+ Copyright (C) 2016 Matthias P. Braendli (http://www.opendigitalradio.org)
+ Copyright (C) 2015 Data Path
+
+ This program 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.
+
+ This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+ Authors:
+ Sergio Sagliocco <sergio.sagliocco@csp.it>
+ Matthias P. Braendli <matthias@mpb.li>
+ / | |- ')|) |-|_ _ (|,_ .| _ ,_ \
+ Data Path \(|(||_(|/_| (||_||(a)_||||(|||.(_()|||/
+
+*/
+
+#include "figs.hpp"
+#include <cstdio>
+#include <string>
+#include <cstring>
+#include <unordered_set>
+
+static std::unordered_set<int> services_seen;
+
+bool fig0_2_is_complete(int services_id)
+{
+ bool complete = services_seen.count(services_id);
+
+ if (complete) {
+ services_seen.clear();
+ }
+ else {
+ services_seen.insert(services_id);
+ }
+
+ return complete;
+}
+
+// FIG 0/2 Basic service and service component definition
+// ETSI EN 300 401 6.3.1
+bool fig0_2(fig0_common_t& fig0, int indent)
+{
+ uint16_t sref, sid;
+ uint8_t cid, ecc, local, caid, ncomp, timd, ps, ca, subchid, scty;
+ int k = 1;
+ std::string psdesc;
+ uint8_t* f = fig0.f;
+ char sctydesc[32];
+ char desc[256];
+ bool complete = false;
+
+ while (k < fig0.figlen) {
+ if (fig0.pd() == 0) {
+ sid = f[k] * 256 + f[k+1];
+ ecc = 0;
+ cid = (f[k] & 0xF0) >> 4;
+ sref = (f[k] & 0x0F) * 256 + f[k+1];
+ k += 2;
+ }
+ else {
+ sid = f[k] * 256 * 256 * 256 + \
+ f[k+1] * 256 * 256 + \
+ f[k+2] * 256 + \
+ f[k+3];
+
+ ecc = f[k];
+ cid = (f[k+1] & 0xF0) >> 4;
+ sref = (f[k+1] & 0x0F) * 256 * 256 + \
+ f[k+2] * 256 + \
+ f[k+3];
+
+ k += 4;
+ }
+
+ complete |= fig0_2_is_complete(sid);
+
+ local = (f[k] & 0x80) >> 7;
+ caid = (f[k] & 0x70) >> 4;
+ ncomp = f[k] & 0x0F;
+
+ if (fig0.pd() == 0)
+ sprintf(desc,
+ "Service ID=0x%X (Country id=%d, Service reference=%d), Number of components=%d, Local flag=%d, CAID=%d",
+ sid, cid, sref, ncomp, local, caid);
+ else
+ sprintf(desc,
+ "Service ID=0x%X (ECC=%d, Country id=%d, Service reference=%d), Number of components=%d, Local flag=%d, CAID=%d",
+ sid, ecc, cid, sref, ncomp, local, caid);
+ printbuf(desc, indent+1, NULL, 0);
+
+ k++;
+ for (int i=0; i<ncomp; i++) {
+ uint8_t scomp[2];
+
+ memcpy(scomp, f+k, 2);
+ sprintf(desc, "Component[%d]", i);
+ printbuf(desc, indent+2, scomp, 2, "");
+ timd = (scomp[0] & 0xC0) >> 6;
+ ps = (scomp[1] & 0x02) >> 1;
+ ca = scomp[1] & 0x01;
+ scty = scomp[0] & 0x3F;
+ subchid = (scomp[1] & 0xFC) >> 2;
+
+ /* useless, kept as reference
+ if (timd == 3) {
+ uint16_t scid;
+ scid = scty*64 + subchid;
+ }
+ */
+
+ if (ps == 0) {
+ psdesc = "Secondary service";
+ }
+ else {
+ psdesc = "Primary service";
+ }
+
+
+ if (timd == 0) {
+ //MSC stream audio
+ if (scty == 0)
+ sprintf(sctydesc, "MPEG Foreground sound (%d)", scty);
+ else if (scty == 1)
+ sprintf(sctydesc, "MPEG Background sound (%d)", scty);
+ else if (scty == 2)
+ sprintf(sctydesc, "Multi Channel sound (%d)", scty);
+ else if (scty == 63)
+ sprintf(sctydesc, "AAC sound (%d)", scty);
+ else
+ sprintf(sctydesc, "Unknown ASCTy (%d)", scty);
+
+ sprintf(desc, "Stream audio mode, %s, %s, SubChannel ID=%02X, CA=%d", psdesc.c_str(), sctydesc, subchid, ca);
+ printbuf(desc, indent+3, NULL, 0);
+ }
+ else if (timd == 1) {
+ // MSC stream data
+ sprintf(sctydesc, "DSCTy=%d %s", scty, get_dscty_type(scty));
+ sprintf(desc, "Stream data mode, %s, %s, SubChannel ID=%02X, CA=%d", psdesc.c_str(), sctydesc, subchid, ca);
+ printbuf(desc, indent+3, NULL, 0);
+ }
+ else if (timd == 2) {
+ // FIDC
+ sprintf(sctydesc, "DSCTy=%d %s", scty, get_dscty_type(scty));
+ sprintf(desc, "FIDC mode, %s, %s, Fast Information Data Channel ID=%02X, CA=%d", psdesc.c_str(), sctydesc, subchid, ca);
+ printbuf(desc, indent+3, NULL, 0);
+ }
+ else if (timd == 3) {
+ // MSC Packet mode
+ sprintf(desc, "MSC Packet Mode, %s, Service Component ID=%02X, CA=%d", psdesc.c_str(), subchid, ca);
+ printbuf(desc, indent+3, NULL, 0);
+ }
+ k += 2;
+ }
+ }
+
+ return complete;
+}
+