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/*
* 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_COMPONENT_DESCRIPTOR
#define _UCSI_DVB_COMPONENT_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
#include <libucsi/types.h>
/**
* Possible values for stream_content.
*/
enum {
DVB_STREAM_CONTENT_VIDEO = 0x01,
DVB_STREAM_CONTENT_AUDIO = 0x02,
DVB_STREAM_CONTENT_SUBTITLE = 0x03,
DVB_STREAM_CONTENT_AC3 = 0x04,
};
/**
* Possible values for component_type.
*/
enum {
DVB_COMPONENT_TYPE_VIDEO_43_25Hz = 0x01,
DVB_COMPONENT_TYPE_VIDEO_169_PAN_25Hz = 0x02,
DVB_COMPONENT_TYPE_VIDEO_169_NOPAN_25Hz = 0x03,
DVB_COMPONENT_TYPE_VIDEO_GT169_25Hz = 0x04,
DVB_COMPONENT_TYPE_VIDEO_43_30Hz = 0x05,
DVB_COMPONENT_TYPE_VIDEO_169_PAN_30Hz = 0x06,
DVB_COMPONENT_TYPE_VIDEO_169_NOPAN_30Hz = 0x07,
DVB_COMPONENT_TYPE_VIDEO_GT169_30Hz = 0x08,
DVB_COMPONENT_TYPE_HDVIDEO_43_25Hz = 0x09,
DVB_COMPONENT_TYPE_HDVIDEO_169_PAN_25Hz = 0x0a,
DVB_COMPONENT_TYPE_HDVIDEO_169_NOPAN_25Hz = 0x0b,
DVB_COMPONENT_TYPE_HDVIDEO_GT169_25Hz = 0x0c,
DVB_COMPONENT_TYPE_HDVIDEO_43_30Hz = 0x0d,
DVB_COMPONENT_TYPE_HDVIDEO_169_PAN_30Hz = 0x0e,
DVB_COMPONENT_TYPE_HDVIDEO_169_NOPAN_30Hz = 0x0f,
DVB_COMPONENT_TYPE_HDVIDEO_GT169_30Hz = 0x10,
DVB_COMPONENT_TYPE_AUDIO_SINGLE_MONO = 0x01,
DVB_COMPONENT_TYPE_AUDIO_DUAL_MONO = 0x02,
DVB_COMPONENT_TYPE_AUDIO_STEREO = 0x03,
DVB_COMPONENT_TYPE_AUDIO_MULTI_LINGUAL_MULTI_CHAN= 0x04,
DVB_COMPONENT_TYPE_AUDIO_SURROUND = 0x05,
DVB_COMPONENT_TYPE_AUDIO_VISUAL_IMPAIRED = 0x40,
DVB_COMPONENT_TYPE_AUDIO_HARDHEAR = 0x41,
DVB_COMPONENT_TYPE_AUDIO_SUPPLEMENTARY = 0x42,
DVB_COMPONENT_TYPE_SUBTITLE_TELETEXT = 0x01,
DVB_COMPONENT_TYPE_SUBTITLE_ASSOC_TELETEXT = 0x02,
DVB_COMPONENT_TYPE_SUBTITLE_VBI = 0x03,
DVB_COMPONENT_TYPE_SUBTITLE_DVB = 0x10,
DVB_COMPONENT_TYPE_SUBTITLE_DVB_43 = 0x11,
DVB_COMPONENT_TYPE_SUBTITLE_DVB_169 = 0x12,
DVB_COMPONENT_TYPE_SUBTITLE_DVB_2211 = 0x13,
DVB_COMPONENT_TYPE_SUBTITLE_DVB_HARDHEAR = 0x20,
DVB_COMPONENT_TYPE_SUBTITLE_DVB_HARDHEAR_43 = 0x21,
DVB_COMPONENT_TYPE_SUBTITLE_DVB_HARDHEAR_169 = 0x22,
DVB_COMPONENT_TYPE_SUBTITLE_DVB_HARDHEAR_2211 = 0x23,
};
/**
* dvb_component_descriptor structure.
*/
struct dvb_component_descriptor {
struct descriptor d;
EBIT2(uint8_t reserved : 4; ,
uint8_t stream_content : 4; );
uint8_t component_type;
uint8_t component_tag;
iso639lang_t language_code;
/* uint8_t text[] */
} __ucsi_packed;
/**
* Process a dvb_component_descriptor.
*
* @param d Pointer to a generic descriptor.
* @return dvb_component_descriptor pointer, or NULL on error.
*/
static inline struct dvb_component_descriptor*
dvb_component_descriptor_codec(struct descriptor* d)
{
if (d->len < (sizeof(struct dvb_component_descriptor) - 2))
return NULL;
return (struct dvb_component_descriptor*) d;
}
/**
* Accessor for the text field of a dvb_component_descriptor.
*
* @param d dvb_component_descriptor pointer.
* @return Pointer to the field.
*/
static inline uint8_t *
dvb_component_descriptor_text(struct dvb_component_descriptor *d)
{
return (uint8_t *) d + sizeof(struct dvb_component_descriptor);
}
/**
* Determine the length of the text field of a dvb_component_descriptor.
*
* @param d dvb_component_descriptor pointer.
* @return Length of the field in bytes.
*/
static inline int
dvb_component_descriptor_text_length(struct dvb_component_descriptor *d)
{
return d->d.len - 6;
}
#ifdef __cplusplus
}
#endif
#endif
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