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148 lines
4.3 KiB
148 lines
4.3 KiB
/*
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* section and descriptor parser
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*
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* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
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* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef _UCSI_DVB_COMPONENT_DESCRIPTOR
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#define _UCSI_DVB_COMPONENT_DESCRIPTOR 1
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <libucsi/descriptor.h>
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#include <libucsi/endianops.h>
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#include <libucsi/types.h>
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/**
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* Possible values for stream_content.
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*/
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enum {
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DVB_STREAM_CONTENT_VIDEO = 0x01,
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DVB_STREAM_CONTENT_AUDIO = 0x02,
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DVB_STREAM_CONTENT_SUBTITLE = 0x03,
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DVB_STREAM_CONTENT_AC3 = 0x04,
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};
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/**
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* Possible values for component_type.
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*/
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enum {
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DVB_COMPONENT_TYPE_VIDEO_43_25Hz = 0x01,
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DVB_COMPONENT_TYPE_VIDEO_169_PAN_25Hz = 0x02,
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DVB_COMPONENT_TYPE_VIDEO_169_NOPAN_25Hz = 0x03,
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DVB_COMPONENT_TYPE_VIDEO_GT169_25Hz = 0x04,
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DVB_COMPONENT_TYPE_VIDEO_43_30Hz = 0x05,
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DVB_COMPONENT_TYPE_VIDEO_169_PAN_30Hz = 0x06,
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DVB_COMPONENT_TYPE_VIDEO_169_NOPAN_30Hz = 0x07,
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DVB_COMPONENT_TYPE_VIDEO_GT169_30Hz = 0x08,
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DVB_COMPONENT_TYPE_HDVIDEO_43_25Hz = 0x09,
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DVB_COMPONENT_TYPE_HDVIDEO_169_PAN_25Hz = 0x0a,
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DVB_COMPONENT_TYPE_HDVIDEO_169_NOPAN_25Hz = 0x0b,
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DVB_COMPONENT_TYPE_HDVIDEO_GT169_25Hz = 0x0c,
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DVB_COMPONENT_TYPE_HDVIDEO_43_30Hz = 0x0d,
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DVB_COMPONENT_TYPE_HDVIDEO_169_PAN_30Hz = 0x0e,
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DVB_COMPONENT_TYPE_HDVIDEO_169_NOPAN_30Hz = 0x0f,
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DVB_COMPONENT_TYPE_HDVIDEO_GT169_30Hz = 0x10,
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DVB_COMPONENT_TYPE_AUDIO_SINGLE_MONO = 0x01,
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DVB_COMPONENT_TYPE_AUDIO_DUAL_MONO = 0x02,
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DVB_COMPONENT_TYPE_AUDIO_STEREO = 0x03,
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DVB_COMPONENT_TYPE_AUDIO_MULTI_LINGUAL_MULTI_CHAN= 0x04,
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DVB_COMPONENT_TYPE_AUDIO_SURROUND = 0x05,
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DVB_COMPONENT_TYPE_AUDIO_VISUAL_IMPAIRED = 0x40,
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DVB_COMPONENT_TYPE_AUDIO_HARDHEAR = 0x41,
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DVB_COMPONENT_TYPE_AUDIO_SUPPLEMENTARY = 0x42,
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DVB_COMPONENT_TYPE_SUBTITLE_TELETEXT = 0x01,
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DVB_COMPONENT_TYPE_SUBTITLE_ASSOC_TELETEXT = 0x02,
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DVB_COMPONENT_TYPE_SUBTITLE_VBI = 0x03,
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DVB_COMPONENT_TYPE_SUBTITLE_DVB = 0x10,
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DVB_COMPONENT_TYPE_SUBTITLE_DVB_43 = 0x11,
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DVB_COMPONENT_TYPE_SUBTITLE_DVB_169 = 0x12,
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DVB_COMPONENT_TYPE_SUBTITLE_DVB_2211 = 0x13,
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DVB_COMPONENT_TYPE_SUBTITLE_DVB_HARDHEAR = 0x20,
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DVB_COMPONENT_TYPE_SUBTITLE_DVB_HARDHEAR_43 = 0x21,
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DVB_COMPONENT_TYPE_SUBTITLE_DVB_HARDHEAR_169 = 0x22,
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DVB_COMPONENT_TYPE_SUBTITLE_DVB_HARDHEAR_2211 = 0x23,
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};
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/**
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* dvb_component_descriptor structure.
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*/
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struct dvb_component_descriptor {
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struct descriptor d;
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EBIT2(uint8_t reserved : 4; ,
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uint8_t stream_content : 4; );
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uint8_t component_type;
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uint8_t component_tag;
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iso639lang_t language_code;
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/* uint8_t text[] */
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} __ucsi_packed;
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/**
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* Process a dvb_component_descriptor.
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*
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* @param d Pointer to a generic descriptor.
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* @return dvb_component_descriptor pointer, or NULL on error.
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*/
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static inline struct dvb_component_descriptor*
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dvb_component_descriptor_codec(struct descriptor* d)
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{
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if (d->len < (sizeof(struct dvb_component_descriptor) - 2))
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return NULL;
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return (struct dvb_component_descriptor*) d;
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}
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/**
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* Accessor for the text field of a dvb_component_descriptor.
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*
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* @param d dvb_component_descriptor pointer.
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* @return Pointer to the field.
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*/
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static inline uint8_t *
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dvb_component_descriptor_text(struct dvb_component_descriptor *d)
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{
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return (uint8_t *) d + sizeof(struct dvb_component_descriptor);
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}
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/**
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* Determine the length of the text field of a dvb_component_descriptor.
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*
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* @param d dvb_component_descriptor pointer.
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* @return Length of the field in bytes.
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*/
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static inline int
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dvb_component_descriptor_text_length(struct dvb_component_descriptor *d)
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{
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return d->d.len - 6;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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