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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_MPEG_AUDIO_STREAM_DESCRIPTOR
#define _UCSI_MPEG_AUDIO_STREAM_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* mpeg_audio_stream_descriptor structure
*/
struct mpeg_audio_stream_descriptor {
struct descriptor d;
EBIT5(uint8_t free_format_flag : 1; ,
uint8_t id : 1; ,
uint8_t layer : 2; ,
uint8_t variable_rate_audio_indicator : 1; ,
uint8_t reserved : 3; );
} __ucsi_packed;
/**
* Process an mpeg_audio_stream_descriptor.
*
* @param d Pointer to the generic descriptor structure.
* @return Pointer to the mpeg_audio_stream_descriptor structure, or NULL on error.
*/
static inline struct mpeg_audio_stream_descriptor*
mpeg_audio_stream_descriptor_codec(struct descriptor *d)
{
if (d->len != (sizeof(struct mpeg_audio_stream_descriptor) - 2))
return NULL;
return (struct mpeg_audio_stream_descriptor*) d;
}
#ifdef __cplusplus
}
#endif
#endif
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