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author | Mark Purcell <msp@debian.org> | 2008-06-22 11:00:40 +1000 |
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committer | etobi <git@e-tobi.net> | 2013-09-03 09:48:42 +0200 |
commit | 891c51ff368ed700dec6025eeb47ce4d96f76418 (patch) | |
tree | 3729664829e4faa691d403274f38eb10890b533c /lib/libucsi/mpeg/iso_639_language_descriptor.h | |
parent | 1c6e1f28f54ec2606c23936c1d8689f2be55a86c (diff) | |
parent | ab959d7b4194715870128e616b8e29d4a101e488 (diff) | |
download | linux-dvb-apps-891c51ff368ed700dec6025eeb47ce4d96f76418.tar.gz |
Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1
Diffstat (limited to '')
-rw-r--r-- | lib/libucsi/mpeg/iso_639_language_descriptor.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/lib/libucsi/mpeg/iso_639_language_descriptor.h b/lib/libucsi/mpeg/iso_639_language_descriptor.h new file mode 100644 index 0000000..5b5aac0 --- /dev/null +++ b/lib/libucsi/mpeg/iso_639_language_descriptor.h @@ -0,0 +1,124 @@ +/* + * 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_MPEG_ISO_639_LANGUAGE_DESCRIPTOR +#define _UCSI_MPEG_ISO_639_LANGUAGE_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/descriptor.h> +#include <libucsi/endianops.h> +#include <libucsi/types.h> + +/** + * Possible values for audio_type. + */ +enum { + MPEG_AUDIO_TYPE_CLEAN_EFFECTS = 0x01, + MPEG_AUDIO_TYPE_HEARING_IMPAIRED = 0x02, + MPEG_AUDIO_TYPE_VISUAL_IMPAIRED_COMMENTARY = 0x03, +}; + +/** + * mpeg_iso_639_language_descriptor structure. + */ +struct mpeg_iso_639_language_descriptor { + struct descriptor d; + + /* struct mpeg_iso_639_language_code languages[] */ +} __ucsi_packed; + +/** + * An entry in the mpeg_iso_639_language_descriptor languages field. + */ +struct mpeg_iso_639_language_code { + iso639lang_t language_code; + uint8_t audio_type; +} __ucsi_packed; + +/** + * Process an mpeg_iso_639_language_descriptor. + * + * @param d Generic descriptor structure. + * @return Pointer to an mpeg_iso_639_language_descriptor structure, or NULL + * on error. + */ +static inline struct mpeg_iso_639_language_descriptor* + mpeg_iso_639_language_descriptor_codec(struct descriptor* d) +{ + if (d->len % sizeof(struct mpeg_iso_639_language_code)) + return NULL; + + return (struct mpeg_iso_639_language_descriptor*) d; +} + +/** + * Convenience iterator for the languages field of an mpeg_iso_639_language_descriptor + * + * @param d Pointer to the mpeg_iso_639_language_descriptor structure. + * @param pos Variable holding a pointer to the current entry. + */ +#define mpeg_iso_639_language_descriptor_languages_for_each(_d, _pos) \ + for ((_pos) = mpeg_iso_639_language_descriptor_languages_first(_d); \ + (_pos); \ + (_pos) = mpeg_iso_639_language_descriptor_languages_next(_d, _pos)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct mpeg_iso_639_language_code* + mpeg_iso_639_language_descriptor_languages_first(struct mpeg_iso_639_language_descriptor *d) +{ + if (d->d.len < sizeof(struct mpeg_iso_639_language_code)) + return NULL; + + return (struct mpeg_iso_639_language_code *) + ((uint8_t*) d + sizeof(struct mpeg_iso_639_language_descriptor)); +} + +static inline struct mpeg_iso_639_language_code* + mpeg_iso_639_language_descriptor_languages_next(struct mpeg_iso_639_language_descriptor *d, + struct mpeg_iso_639_language_code *pos) +{ + uint8_t *end = (uint8_t*) d + 2 + d->d.len; + uint8_t *next = (uint8_t *) pos + sizeof(struct mpeg_iso_639_language_code); + + if (next >= end) + return NULL; + + return (struct mpeg_iso_639_language_code *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif |