From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/atsc/time_shifted_service_descriptor.h | 136 +++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 lib/libucsi/atsc/time_shifted_service_descriptor.h (limited to 'lib/libucsi/atsc/time_shifted_service_descriptor.h') diff --git a/lib/libucsi/atsc/time_shifted_service_descriptor.h b/lib/libucsi/atsc/time_shifted_service_descriptor.h new file mode 100644 index 0000000..599e66d --- /dev/null +++ b/lib/libucsi/atsc/time_shifted_service_descriptor.h @@ -0,0 +1,136 @@ +/* + * section and descriptor parser + * + * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org) + * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net) + * + * This library 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#ifndef _UCSI_ATSC_TIME_SHIFTED_SERVICE_DESCRIPTOR +#define _UCSI_ATSC_TIME_SHIFTED_SERVICE_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include +#include +#include + +/** + * atsc_time_shifted_service_descriptor structure. + */ +struct atsc_time_shifted_service_descriptor { + struct descriptor d; + + EBIT2(uint8_t reserved : 3; , + uint8_t number_of_services : 5; ); + /* struct atsc_time_shifted_service services[] */ +} __ucsi_packed; + +/** + * An entry in the services field of an atsc_time_shifted_service_descriptor. + */ +struct atsc_time_shifted_service { + EBIT2(uint16_t reserved : 6; , + uint16_t time_shift :10; ); + EBIT3(uint32_t reserved2 : 4; , + uint32_t major_channel_number :10; , + uint32_t minor_channel_number :10; ); +} __ucsi_packed; + +/** + * Process an atsc_time_shifted_service_descriptor. + * + * @param d Generic descriptor pointer. + * @return atsc_time_shifted_service_descriptor pointer, or NULL on error. + */ +static inline struct atsc_time_shifted_service_descriptor* + atsc_time_shifted_service_descriptor_codec(struct descriptor* d) +{ + struct atsc_time_shifted_service_descriptor *ret = + (struct atsc_time_shifted_service_descriptor *) d; + uint8_t *buf = (uint8_t*) d + 2; + int pos = 0; + int idx; + + if (d->len < 1) + return NULL; + pos++; + + for(idx = 0; idx < ret->number_of_services; idx++) { + if (d->len < (pos + sizeof(struct atsc_time_shifted_service))) + return NULL; + + bswap16(buf+pos); + bswap24(buf+pos+2); + + pos += sizeof(struct atsc_time_shifted_service); + } + + return (struct atsc_time_shifted_service_descriptor*) d; +} + +/** + * Iterator for services field of a atsc_time_shifted_service_descriptor. + * + * @param d atsc_time_shifted_service_descriptor pointer. + * @param pos Variable holding a pointer to the current atsc_service_location_element. + * @param idx Integer used to count which service we are in. + */ +#define atsc_time_shifted_service_descriptor_services_for_each(d, pos, idx) \ + for ((pos) = atsc_time_shifted_service_descriptor_services_first(d), idx=0; \ + (pos); \ + (pos) = atsc_time_shifted_service_descriptor_services_next(d, pos, ++idx)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct atsc_time_shifted_service* + atsc_time_shifted_service_descriptor_services_first(struct atsc_time_shifted_service_descriptor *d) +{ + if (d->number_of_services == 0) + return NULL; + + return (struct atsc_time_shifted_service *) + ((uint8_t*) d + sizeof(struct atsc_time_shifted_service_descriptor)); +} + +static inline struct atsc_time_shifted_service* + atsc_time_shifted_service_descriptor_services_next(struct atsc_time_shifted_service_descriptor *d, + struct atsc_time_shifted_service *pos, + int idx) +{ + uint8_t *next = (uint8_t *) pos + sizeof(struct atsc_time_shifted_service); + + if (idx >= d->number_of_services) + return NULL; + return (struct atsc_time_shifted_service *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3