/* * Copyright (c) 2013 - Mauro Carvalho Chehab * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation version 2.1 of the License. * * 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html * * Based on ETSI EN 300 468 V1.11.1 (2010-04) */ #include #include #include #if __GNUC__ >= 9 #pragma GCC diagnostic ignored "-Waddress-of-packed-member" #endif int dvb_desc_t2_delivery_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf, struct dvb_extension_descriptor *ext, void *desc) { struct dvb_desc_t2_delivery *d = desc; unsigned char *p = (unsigned char *) buf; size_t desc_len = ext->length - 1, len, len2; int i, pos = 0; len = offsetof(struct dvb_desc_t2_delivery, bitfield); len2 = offsetof(struct dvb_desc_t2_delivery, centre_frequency); if (desc_len < len) { dvb_logwarn("T2 delivery descriptor is too small"); return -1; } if (desc_len < len2) { memcpy(d, buf, len); bswap16(d->system_id); /* It is valid to have length == 4 */ if (desc_len == len) return 0; dvb_logwarn("T2 delivery descriptor is truncated"); return -2; } memcpy(d, buf, len2); bswap16(d->system_id); bswap16(d->bitfield); p += len2; while (desc_len - (p - buf)) { if (desc_len - (p - buf) < sizeof(uint16_t)) { dvb_logwarn("T2 delivery descriptor is truncated"); return -2; } d->cell = realloc(d->cell, (d->num_cell + 1) * sizeof(*d->cell)); if (!d->cell) { dvb_logerr("%s: out of memory", __func__); return -3; } d->cell[d->num_cell].cell_id = *(uint16_t *)p; bswap16(d->cell[d->num_cell].cell_id); p += sizeof(uint16_t); if (d->tfs_flag) { d->cell[d->num_cell].num_freqs = *p; p++; } else d->cell[d->num_cell].num_freqs = 1; d->frequency_loop_length += d->cell[d->num_cell].num_freqs; d->centre_frequency = realloc(d->centre_frequency, d->frequency_loop_length * sizeof(*d->centre_frequency)); if (!d->centre_frequency) { dvb_logerr("%s: out of memory", __func__); return -3; } d->cell[d->num_cell].centre_frequency = &d->centre_frequency[pos]; memcpy(&d->centre_frequency[pos], p, sizeof(*d->centre_frequency) * d->cell[d->num_cell].num_freqs); p += sizeof(*d->centre_frequency) * d->cell[d->num_cell].num_freqs; for (i = 0; i < d->cell[d->num_cell].num_freqs; i++) { bswap32(d->centre_frequency[pos]); pos++; } /* Handle subcel frequency table */ d->cell[d->num_cell].subcel_length = *p; d->cell[d->num_cell].subcel = NULL; p++; if (d->cell[d->num_cell].subcel_length) { d->cell[d->num_cell].subcel = calloc(d->cell[d->num_cell].subcel_length, sizeof (*d->cell[d->num_cell].subcel)); if (!d->cell[d->num_cell].subcel) { dvb_logerr("%s: out of memory", __func__); return -3; } } for (i = 0; i < d->cell[d->num_cell].subcel_length; i++) { if (desc_len - (p - buf) < sizeof(uint8_t) + sizeof(uint32_t)) { dvb_logwarn("T2 delivery descriptor is truncated"); return -2; } d->cell[d->num_cell].subcel[i].cell_id_extension = *p; p++; // Add transposer_frequency at centre_frequency table d->frequency_loop_length++; d->centre_frequency = realloc(d->centre_frequency, d->frequency_loop_length * sizeof(*d->centre_frequency)); memcpy(&d->centre_frequency[pos], p, sizeof(*d->centre_frequency)); bswap32(d->centre_frequency[pos]); d->cell[d->num_cell].subcel[i].transposer_frequency = d->centre_frequency[pos]; pos++; p += sizeof(*d->centre_frequency); } d->num_cell++; } return 0; } void dvb_desc_t2_delivery_print(struct dvb_v5_fe_parms *parms, const struct dvb_extension_descriptor *ext, const void *desc) { const struct dvb_desc_t2_delivery *d = desc; int i, j, k; dvb_loginfo("| plp_id 0x%04x", d->plp_id); dvb_loginfo("| system_id 0x%04x", d->system_id); if (ext->length - 1 <= 4) return; dvb_loginfo("| tfs_flag %d", d->tfs_flag); dvb_loginfo("| other_frequency_flag %d", d->other_frequency_flag); dvb_loginfo("| transmission_mode %s (%d)", fe_transmission_mode_name[dvbt2_transmission_mode[d->transmission_mode]], d->transmission_mode); dvb_loginfo("| guard_interval %s (%d)", fe_guard_interval_name[dvbt2_interval[d->guard_interval]], d->guard_interval ); dvb_loginfo("| reserved %d", d->reserved); dvb_loginfo("| bandwidth %.2f MHz (%d)", dvbt2_bw[d->bandwidth]/ 1000000., d->bandwidth); dvb_loginfo("| SISO/MISO mode %s", siso_miso[d->SISO_MISO]); /* * All frequencies are also at the per-cell data. Yet, as the flat * frequency table is what's used to add new transponders for DVB-T2 * scan, let's display the flat table too */ for (i = 0; i < d->frequency_loop_length; i++) dvb_loginfo("| frequency[%d] %.5f MHz", i, d->centre_frequency[i] / 100000.); for (i = 0; i < d->num_cell; i++) { struct dvb_desc_t2_delivery_cell *cell = &d->cell[i]; dvb_loginfo("| Cell ID 0x%04x", cell->cell_id); for (j = 0; j < cell->num_freqs; j++) { dvb_loginfo("| centre frequency[%d] %.5f MHz", j, cell->centre_frequency[j] / 100000.); for (k = 0; k < cell->subcel_length; k++) { struct dvb_desc_t2_delivery_subcell *subcel = &cell->subcel[k]; dvb_loginfo("| |- subcell %d", subcel->cell_id_extension); dvb_loginfo("| |- transposer %.5f MHz", subcel->transposer_frequency / 100000.); } } } } void dvb_desc_t2_delivery_free(const void *desc) { const struct dvb_desc_t2_delivery *d = desc; int i; if (d->centre_frequency) free(d->centre_frequency); if (d->cell) { for (i = 0; i < d->num_cell; i++) if (d->cell[i].subcel) free(d->cell[i].subcel); free (d->cell); } // No need to free d->subcell, as it is always NULL } const unsigned dvbt2_bw[] = { [0] = 8000000, [1] = 7000000, [2] = 6000000, [3] = 5000000, [4] = 10000000, [5] = 1712000, [6 ...15] = 0, /* Reserved */ }; const uint32_t dvbt2_interval[] = { [0] = GUARD_INTERVAL_1_32, [1] = GUARD_INTERVAL_1_16, [2] = GUARD_INTERVAL_1_8, [3] = GUARD_INTERVAL_1_4, [4] = GUARD_INTERVAL_1_128, [5] = GUARD_INTERVAL_19_128, [6] = GUARD_INTERVAL_19_256, [7 ...15] = GUARD_INTERVAL_AUTO /* Reserved */ }; const unsigned dvbt2_transmission_mode[] = { [0] = TRANSMISSION_MODE_2K, [1] = TRANSMISSION_MODE_8K, [2] = TRANSMISSION_MODE_4K, [3] = TRANSMISSION_MODE_1K, [4] = TRANSMISSION_MODE_16K, [5] = TRANSMISSION_MODE_32K, [6 ...7] = TRANSMISSION_MODE_AUTO, /* Reserved */ }; const char *siso_miso[4] = { [0] = "Single Input, Single Output (SISO)", [1] = "Multiple Input, Single Output (MISO)", [2 ...3] = "reserved", };