From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/dvb/s2_satellite_delivery_descriptor.h | 116 +++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 lib/libucsi/dvb/s2_satellite_delivery_descriptor.h (limited to 'lib/libucsi/dvb/s2_satellite_delivery_descriptor.h') diff --git a/lib/libucsi/dvb/s2_satellite_delivery_descriptor.h b/lib/libucsi/dvb/s2_satellite_delivery_descriptor.h new file mode 100644 index 0000000..8f9fea8 --- /dev/null +++ b/lib/libucsi/dvb/s2_satellite_delivery_descriptor.h @@ -0,0 +1,116 @@ +/* + * 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_S2_SATELLITE_DELIVERY_DESCRIPTOR +#define _UCSI_DVB_S2_SATELLITE_DELIVERY_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include +#include + +/** + * dvb_s2_satellite_delivery_descriptor structure. + */ +struct dvb_s2_satellite_delivery_descriptor { + struct descriptor d; + + EBIT4(uint8_t scrambling_sequence_selector : 1; , + uint8_t multiple_input_stream : 1; , + uint8_t backwards_compatability : 1; , + uint8_t reserved : 5; ); + /* uint32_t scrambling_sequence_index if scrambling_sequence_selector = 1 */ + /* uint8_t input_stream_id if multiple_input_stream = 1 */ +} __ucsi_packed; + +/** + * Process a dvb_s2_satellite_delivery_descriptor. + * + * @param d Pointer to a generic descriptor structure. + * @return dvb_s2_satellite_delivery_descriptor pointer, or NULL on error. + */ +static inline struct dvb_s2_satellite_delivery_descriptor* + dvb_s2_satellite_delivery_descriptor_codec(struct descriptor* d) +{ + struct dvb_s2_satellite_delivery_descriptor *s2 = + (struct dvb_s2_satellite_delivery_descriptor*) d; + + if (d->len < (sizeof(struct dvb_s2_satellite_delivery_descriptor) - 2)) + return NULL; + + int len = sizeof(struct dvb_s2_satellite_delivery_descriptor); + if (s2->scrambling_sequence_selector) { + len += 3; + } + if (s2->multiple_input_stream) { + len += 1; + } + + if (d->len < len) + return NULL; + + return s2; +} + +/** + * Accessor for the scrambling_sequence_index field of a dvb_s2_satellite_delivery_descriptor. + * + * @param s2 dvb_s2_satellite_delivery_descriptor pointer. + * @return The scrambling_sequence_index. + */ +static inline uint32_t dvb_s2_satellite_delivery_descriptor_scrambling_sequence_index(struct dvb_s2_satellite_delivery_descriptor *s2) +{ + uint8_t *tmp = (uint8_t*) s2; + + if (s2->scrambling_sequence_selector) { + return ((tmp[4] & 0x03) << 16) | (tmp[5] << 8) | tmp[6]; + } + return 0; +} + +/** + * Accessor for the input_stream_id field of a dvb_s2_satellite_delivery_descriptor. + * + * @param s2 dvb_s2_satellite_delivery_descriptor pointer. + * @return The input_stream_id. + */ +static inline uint8_t dvb_s2_satellite_delivery_descriptor_input_stream_id(struct dvb_s2_satellite_delivery_descriptor *s2) +{ + uint8_t *tmp = (uint8_t*) s2; + + if (!s2->multiple_input_stream) + return 0; + + int off = 3; + if (s2->scrambling_sequence_selector) { + off += 3; + } + return tmp[off]; +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3