diff options
author | Mark Purcell <msp@debian.org> | 2008-06-22 11:00:40 +1000 |
---|---|---|
committer | etobi <git@e-tobi.net> | 2013-09-03 09:48:42 +0200 |
commit | 891c51ff368ed700dec6025eeb47ce4d96f76418 (patch) | |
tree | 3729664829e4faa691d403274f38eb10890b533c /lib/libucsi/atsc/service_location_descriptor.h | |
parent | 1c6e1f28f54ec2606c23936c1d8689f2be55a86c (diff) | |
parent | ab959d7b4194715870128e616b8e29d4a101e488 (diff) | |
download | linux-dvb-apps-a966623153d5c69ef156542.tar.gz |
Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1
Diffstat (limited to 'lib/libucsi/atsc/service_location_descriptor.h')
-rw-r--r-- | lib/libucsi/atsc/service_location_descriptor.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/lib/libucsi/atsc/service_location_descriptor.h b/lib/libucsi/atsc/service_location_descriptor.h new file mode 100644 index 0000000..aad5b4a --- /dev/null +++ b/lib/libucsi/atsc/service_location_descriptor.h @@ -0,0 +1,141 @@ +/* + * 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_SERVICE_LOCATION_DESCRIPTOR +#define _UCSI_ATSC_SERVICE_LOCATION_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/descriptor.h> +#include <libucsi/endianops.h> +#include <libucsi/types.h> + +enum atsc_stream_types { + ATSC_STREAM_TYPE_VIDEO = 0x02, + ATSC_STREAM_TYPE_AUDIO = 0x81, +}; + +/** + * atsc_service_location_descriptor structure. + */ +struct atsc_service_location_descriptor { + struct descriptor d; + + EBIT2(uint16_t reserved : 3; , + uint16_t PCR_PID :13; ); + uint8_t number_elements; + /* struct atsc_service_location_element elements[] */ +} __ucsi_packed; + +/** + * An entry in the elements field of an atsc_service_location_descriptor. + */ +struct atsc_caption_service_location_element { + uint8_t stream_type; + EBIT2(uint16_t reserved : 3; , + uint16_t elementary_PID :13; ); + iso639lang_t language_code; +} __ucsi_packed; + +/** + * Process an atsc_service_location_descriptor. + * + * @param d Generic descriptor pointer. + * @return atsc_service_location_descriptor pointer, or NULL on error. + */ +static inline struct atsc_service_location_descriptor* + atsc_service_location_descriptor_codec(struct descriptor* d) +{ + struct atsc_service_location_descriptor *ret = + (struct atsc_service_location_descriptor *) d; + uint8_t *buf = (uint8_t*) d + 2; + int pos = 0; + int idx; + + if (d->len < 3) + return NULL; + bswap16(buf + pos); + pos+=3; + + for(idx = 0; idx < ret->number_elements; idx++) { + if (d->len < (pos + sizeof(struct atsc_caption_service_entry))) + return NULL; + + bswap16(buf+pos+1); + + pos += sizeof(struct atsc_caption_service_entry); + } + + return (struct atsc_service_location_descriptor*) d; +} + +/** + * Iterator for elements field of a atsc_service_location_descriptor. + * + * @param d atsc_service_location_descriptor pointer. + * @param pos Variable holding a pointer to the current atsc_service_location_element. + * @param idx Integer used to count which dimension we are in. + */ +#define atsc_service_location_descriptor_elements_for_each(d, pos, idx) \ + for ((pos) = atsc_service_location_descriptor_elements_first(d), idx=0; \ + (pos); \ + (pos) = atsc_service_location_descriptor_elements_next(d, pos, ++idx)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct atsc_caption_service_location_element* + atsc_service_location_descriptor_elements_first(struct atsc_service_location_descriptor *d) +{ + if (d->number_elements == 0) + return NULL; + + return (struct atsc_caption_service_location_element *) + ((uint8_t*) d + sizeof(struct atsc_service_location_descriptor)); +} + +static inline struct atsc_caption_service_location_element* + atsc_service_location_descriptor_elements_next(struct atsc_service_location_descriptor *d, + struct atsc_caption_service_location_element *pos, + int idx) +{ + uint8_t *next = (uint8_t *) pos + sizeof(struct atsc_caption_service_location_element); + + if (idx >= d->number_elements) + return NULL; + return (struct atsc_caption_service_location_element *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif |