diff options
Diffstat (limited to 'lib/libucsi/dvb/ait_application_descriptor.h')
| -rw-r--r-- | lib/libucsi/dvb/ait_application_descriptor.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/ait_application_descriptor.h b/lib/libucsi/dvb/ait_application_descriptor.h new file mode 100644 index 0000000..95fb7e3 --- /dev/null +++ b/lib/libucsi/dvb/ait_application_descriptor.h @@ -0,0 +1,204 @@ +/* + * 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_DVB_AIT_APPLICATION_DESCRIPTOR +#define _UCSI_DVB_AIT_APPLICATION_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/descriptor.h> +#include <libucsi/endianops.h> + +/** + * Possible values for the visibility field. + */ +enum { + AVB_AIT_APPLICATION_VISIBILITY_HIDDEN = 0x00, + AVB_AIT_APPLICATION_VISIBILITY_APPSONLY = 0x01, + AVB_AIT_APPLICATION_VISIBILITY_VISIBLE = 0x03, +}; + +/** + * dvb_ait_application_descriptor structure. + */ +struct dvb_ait_application_descriptor { + struct descriptor d; + + uint8_t application_profiles_length; + /* struct dvb_ait_application_profile profiles [] */ + /* struct dvb_ait_application_descriptor_part2 part2 */ +} __ucsi_packed; + +/** + * An entry in the profiles field of a dvb_ait_application_descriptor. + */ +struct dvb_ait_application_profile { + uint16_t application_profile; + uint8_t version_major; + uint8_t version_minor; + uint8_t version_micro; +} __ucsi_packed; + +/** + * Second part of a dvb_ait_application_descriptor structure. + */ +struct dvb_ait_application_descriptor_part2 { + EBIT3(uint8_t service_bound_flag : 1; , + uint8_t visibility : 2; , + uint8_t reserved : 5; ); + uint8_t application_priority; + /* uint8_t transport_protocol_label[] */ +} __ucsi_packed; + +/** + * Process a dvb_ait_application_descriptor. + * + * @param d Generic descriptor pointer. + * @return dvb_ait_application_descriptor pointer, or NULL on error. + */ +static inline struct dvb_ait_application_descriptor* + dvb_ait_application_descriptor_codec(struct descriptor* d) +{ + uint32_t pos = 0; + uint32_t pos2 = 0; + uint32_t len = d->len + 2; + uint8_t* buf = (uint8_t*) d; + struct dvb_ait_application_descriptor *ret = + (struct dvb_ait_application_descriptor*) d; + + if (len < sizeof(struct dvb_ait_application_descriptor)) + return NULL; + + if (len < (sizeof(struct dvb_ait_application_descriptor) + ret->application_profiles_length)) + return NULL; + + if (ret->application_profiles_length % sizeof(struct dvb_ait_application_profile)) + return NULL; + + pos += sizeof(struct dvb_ait_application_descriptor); + pos2 = 0; + while(pos2 < ret->application_profiles_length) { + bswap16(buf + pos + pos2); + pos2 += sizeof(struct dvb_ait_application_descriptor); + } + pos += pos2; + + if (len < (pos + sizeof(struct dvb_ait_application_descriptor_part2))) + return NULL; + + return ret; +} + +/** + * Iterator for the profiles field of a dvb_ait_application_descriptor. + * + * @param d dvb_ait_application_descriptor pointer. + * @param pos Variable containing a pointer to the current dvb_ait_application_profile. + */ +#define dvb_ait_application_descriptor_profiles_for_each(d, pos) \ + for ((pos) = dvb_ait_application_descriptor_profiles_first(d); \ + (pos); \ + (pos) = dvb_ait_application_descriptor_profiles_next(d, pos)) + +/** + * Accessor for the part2 field of a dvb_ait_application_descriptor. + * + * @param d dvb_ait_application_descriptor pointer. + * @return dvb_ait_application_descriptor_part2 pointer. + */ +static inline struct dvb_ait_application_descriptor_part2* + dvb_ait_application_descriptor_part2(struct dvb_ait_application_descriptor* d) +{ + return (struct dvb_ait_application_descriptor_part2*) + ((uint8_t*) d + + sizeof(struct dvb_ait_application_descriptor) + + d->application_profiles_length); +} + +/** + * Accessor for the transport_protocol_label field of a dvb_ait_application_descriptor_part2. + * + * @param d dvb_ait_application_descriptor_part2 pointer. + * @return Pointer to the field. + */ +static inline uint8_t* + dvb_ait_application_descriptor_part2_transport_protocol_label(struct dvb_ait_application_descriptor_part2* d) +{ + return (uint8_t*) d + + sizeof(struct dvb_ait_application_descriptor_part2); +} + +/** + * Calculate the number of bytes in the transport_protocol_label field of a dvb_ait_application_descriptor_part2. + * + * @param d dvb_ait_application_descriptor pointer. + * @param part2 dvb_ait_application_descriptor_part2 pointer. + * @return Number of bytes. + */ +static inline int + dvb_ait_application_descriptor_part2_transport_protocol_label_length(struct dvb_ait_application_descriptor *d, + struct dvb_ait_application_descriptor_part2* part2) +{ + uint8_t *ptr = (uint8_t*) part2 + sizeof(struct dvb_ait_application_descriptor_part2); + uint8_t *end = (uint8_t*) d + d->d.len + 2; + + return (int) (end - ptr); +} + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_ait_application_profile* + dvb_ait_application_descriptor_profiles_first(struct dvb_ait_application_descriptor *d) +{ + if (d->application_profiles_length == 0) + return NULL; + + return (struct dvb_ait_application_profile *) + ((uint8_t*) d + sizeof(struct dvb_ait_application_descriptor)); +} + +static inline struct dvb_ait_application_profile* + dvb_ait_application_descriptor_profiles_next(struct dvb_ait_application_descriptor *d, + struct dvb_ait_application_profile *pos) +{ + uint8_t *end = (uint8_t*) d + + sizeof(struct dvb_ait_application_descriptor) + + d->application_profiles_length; + uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_ait_application_profile); + + if (next >= end) + return NULL; + + return (struct dvb_ait_application_profile *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif |