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Diffstat (limited to 'lib/libucsi/dvb/service_descriptor.h')
| -rw-r--r-- | lib/libucsi/dvb/service_descriptor.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/service_descriptor.h b/lib/libucsi/dvb/service_descriptor.h new file mode 100644 index 0000000..dd0f0ec --- /dev/null +++ b/lib/libucsi/dvb/service_descriptor.h @@ -0,0 +1,163 @@ +/* + * 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_SERVICE_DESCRIPTOR +#define _UCSI_DVB_SERVICE_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/descriptor.h> +#include <libucsi/endianops.h> + +/** + * Possible values for service_type. + */ +enum { + DVB_SERVICE_TYPE_DIGITAL_TV = 0x01, + DVB_SERVICE_TYPE_DIGITAL_RADIO = 0x02, + DVB_SERVICE_TYPE_TELETEXT = 0x03, + DVB_SERVICE_TYPE_NVOD_REF = 0x04, + DVB_SERVICE_TYPE_NVOD_TIMESHIFT = 0x05, + DVB_SERVICE_TYPE_MOSAIC = 0x06, + DVB_SERVICE_TYPE_PAL = 0x07, + DVB_SERVICE_TYPE_SECAM = 0x08, + DVB_SERVICE_TYPE_D_D2_MAC = 0x09, + DVB_SERVICE_TYPE_FM_RADIO = 0x0a, + DVB_SERVICE_TYPE_NTSC = 0x0b, + DVB_SERVICE_TYPE_DATA_BCAST = 0x0c, + DVB_SERVICE_TYPE_EN50221 = 0x0d, + DVB_SERVICE_TYPE_RCS_MAP = 0x0e, + DVB_SERVICE_TYPE_RCS_FLS = 0x0f, + DVB_SERVICE_TYPE_MHP = 0x10, + DVB_SERVICE_TYPE_MPEG2_HD_DIGITAL_TV = 0x11, + DVB_SERVICE_TYPE_ADVANCED_CODEC_SD_DIGITAL_TV = 0x16, + DVB_SERVICE_TYPE_ADVANCED_CODEC_SD_NVOD_TIMESHIFT = 0x17, + DVB_SERVICE_TYPE_ADVANCED_CODEC_SD_NVOD_REF = 0x18, + DVB_SERVICE_TYPE_ADVANCED_CODEC_HD_DIGITAL_TV = 0x19, + DVB_SERVICE_TYPE_ADVANCED_CODEC_HD_NVOD_TIMESHIFT = 0x1a, + DVB_SERVICE_TYPE_ADVANCED_CODEC_HD_NVOD_REF = 0x1b, +}; + +/** + * dvb_service_descriptor structure. + */ +struct dvb_service_descriptor { + struct descriptor d; + + uint8_t service_type; + uint8_t service_provider_name_length; + /* uint8_t service_provider_name[] */ + /* struct dvb_service_descriptor_part2 part2 */ +} __ucsi_packed; + +/** + * Second part of a dvb_service_descriptor following the variable length + * service_provider_name field. + */ +struct dvb_service_descriptor_part2 { + uint8_t service_name_length; + /* uint8_t service_name[] */ +} __ucsi_packed; + +/** + * Process a dvb_service_descriptor. + * + * @param d Generic descriptor pointer. + * @return dvb_service_descriptor pointer, or NULL on error. + */ +static inline struct dvb_service_descriptor* + dvb_service_descriptor_codec(struct descriptor* d) +{ + struct dvb_service_descriptor *p = + (struct dvb_service_descriptor *) d; + struct dvb_service_descriptor_part2 *p2; + uint32_t pos = sizeof(struct dvb_service_descriptor) - 2; + uint32_t len = d->len; + + if (pos > len) + return NULL; + + pos += p->service_provider_name_length; + + if (pos > len) + return NULL; + + p2 = (struct dvb_service_descriptor_part2*) ((uint8_t*) d + 2 + pos); + + pos += sizeof(struct dvb_service_descriptor_part2); + + if (pos > len) + return NULL; + + pos += p2->service_name_length; + + if (pos != len) + return NULL; + + return p; +} + +/** + * Accessor for the service_provider_name field of a dvb_service_descriptor. + * + * @param d dvb_service_descriptor pointer. + * @return Pointer to the service_provider_name field. + */ +static inline uint8_t * + dvb_service_descriptor_service_provider_name(struct dvb_service_descriptor *d) +{ + return (uint8_t *) d + sizeof(struct dvb_service_descriptor); +} + +/** + * Accessor for the second part of a dvb_service_descriptor. + * + * @param d dvb_service_descriptor pointer. + * @return dvb_service_descriptor_part2 pointer. + */ +static inline struct dvb_service_descriptor_part2 * + dvb_service_descriptor_part2(struct dvb_service_descriptor *d) +{ + return (struct dvb_service_descriptor_part2 *) + ((uint8_t*) d + sizeof(struct dvb_service_descriptor) + + d->service_provider_name_length); +} + +/** + * Accessor for the service_name field of a dvb_service_descriptor_part2. + * + * @param d dvb_service_descriptor_part2 pointer. + * @return Pointer to the service_name field. + */ +static inline uint8_t * + dvb_service_descriptor_service_name(struct dvb_service_descriptor_part2 *d) +{ + return (uint8_t *) d + sizeof(struct dvb_service_descriptor_part2); +} + +#ifdef __cplusplus +} +#endif + +#endif |