1 /*****************************************************************************
2 * desc_48.h: ETSI EN 300 468 Descriptor 0x48: Service descriptor
3 *****************************************************************************
4 * Copyright (C) 2009-2010 VideoLAN
5 *
6 * Authors: Christophe Massiot <massiot@via.ecp.fr>
7 * Georgi Chorbadzhiyski <georgi@unixsol.org>
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining
10 * a copy of this software and associated documentation files (the
11 * "Software"), to deal in the Software without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject
15 * to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
23 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
24 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
25 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
26 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 *****************************************************************************/
28
29 /*
30 * Normative references:
31 * - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
32 */
33
34 #ifndef __BITSTREAM_DVB_DESC_48_H__
35 #define __BITSTREAM_DVB_DESC_48_H__
36
37 #include <bitstream/common.h>
38 #include <bitstream/mpeg/psi/descriptors.h>
39 #include <bitstream/dvb/si/strings.h>
40
41 #ifdef __cplusplus
42 extern "C"
43 {
44 #endif
45
46 /*****************************************************************************
47 * Descriptor 0x48: Service descriptor
48 *****************************************************************************/
49 #define DESC48_HEADER_SIZE (DESC_HEADER_SIZE + 1)
50
desc48_init(uint8_t * p_desc)51 static inline void desc48_init(uint8_t *p_desc)
52 {
53 desc_set_tag(p_desc, 0x48);
54 }
55
desc48_set_type(uint8_t * p_desc,uint8_t i_type)56 static inline void desc48_set_type(uint8_t *p_desc, uint8_t i_type)
57 {
58 p_desc[2] = i_type;
59 }
60
desc48_get_type(const uint8_t * p_desc)61 static inline uint8_t desc48_get_type(const uint8_t *p_desc)
62 {
63 return p_desc[2];
64 }
65
desc48_set_provider(uint8_t * p_desc,const uint8_t * p_provider,uint8_t i_length)66 static inline void desc48_set_provider(uint8_t *p_desc,
67 const uint8_t *p_provider,
68 uint8_t i_length)
69 {
70 uint8_t *p = p_desc + DESC48_HEADER_SIZE;
71 p[0] = i_length;
72 memcpy(p + 1, p_provider, i_length);
73 }
74
desc48_get_provider(const uint8_t * p_desc,uint8_t * pi_length)75 static inline uint8_t *desc48_get_provider(const uint8_t *p_desc,
76 uint8_t *pi_length)
77 {
78 uint8_t *p = (uint8_t *)p_desc + DESC48_HEADER_SIZE;
79 *pi_length = p[0];
80 return p + 1;
81 }
82
desc48_set_service(uint8_t * p_desc,const uint8_t * p_service,uint8_t i_length)83 static inline void desc48_set_service(uint8_t *p_desc,
84 const uint8_t *p_service,
85 uint8_t i_length)
86 {
87 uint8_t *p = p_desc + DESC48_HEADER_SIZE + 1 + p_desc[3];
88 p[0] = i_length;
89 memcpy(p + 1, p_service, i_length);
90 }
91
desc48_get_service(const uint8_t * p_desc,uint8_t * pi_length)92 static inline uint8_t *desc48_get_service(const uint8_t *p_desc,
93 uint8_t *pi_length)
94 {
95 uint8_t *p = (uint8_t *)p_desc + DESC48_HEADER_SIZE + 1 + p_desc[3];
96 *pi_length = p[0];
97 return p + 1;
98 }
99
desc48_set_length(uint8_t * p_desc)100 static inline void desc48_set_length(uint8_t *p_desc)
101 {
102 uint8_t i_provider_len, i_service_len;
103 desc48_get_provider(p_desc, &i_provider_len);
104 desc48_get_service(p_desc, &i_service_len);
105 desc_set_length(p_desc, DESC48_HEADER_SIZE - DESC_HEADER_SIZE
106 + 1 + i_provider_len
107 + 1 + i_service_len);
108 }
109
desc48_validate(const uint8_t * p_desc)110 static inline bool desc48_validate(const uint8_t *p_desc)
111 {
112 uint8_t i_length = desc_get_length(p_desc);
113 const uint8_t *p = p_desc + DESC48_HEADER_SIZE;
114
115 p += *p + 1;
116 if (DESC48_HEADER_SIZE + 2 > i_length + DESC_HEADER_SIZE ||
117 p + 1 - p_desc > i_length + DESC_HEADER_SIZE)
118 return false;
119
120 p += *p + 1;
121 if (p - p_desc > i_length + DESC_HEADER_SIZE)
122 return false;
123
124 return true;
125 }
126
desc48_print(const uint8_t * p_desc,f_print pf_print,void * print_opaque,f_iconv pf_iconv,void * iconv_opaque,print_type_t i_print_type)127 static inline void desc48_print(const uint8_t *p_desc,
128 f_print pf_print, void *print_opaque,
129 f_iconv pf_iconv, void *iconv_opaque,
130 print_type_t i_print_type)
131 {
132 uint8_t i_provider_length, i_service_length;
133 const uint8_t *p_provider = desc48_get_provider(p_desc, &i_provider_length);
134 const uint8_t *p_service = desc48_get_service(p_desc, &i_service_length);
135 char *psz_provider = dvb_string_get(p_provider, i_provider_length,
136 pf_iconv, iconv_opaque);
137 char *psz_service = dvb_string_get(p_service, i_service_length,
138 pf_iconv, iconv_opaque);
139 switch (i_print_type) {
140 case PRINT_XML:
141 psz_provider = dvb_string_xml_escape(psz_provider);
142 psz_service = dvb_string_xml_escape(psz_service);
143 pf_print(print_opaque,
144 "<SERVICE_DESC type=\"0x%hhx\" provider=\"%s\" service=\"%s\"/>",
145 desc48_get_type(p_desc), psz_provider, psz_service);
146 break;
147 default:
148 pf_print(print_opaque,
149 " - desc 48 service type=0x%hhx provider=\"%s\" service=\"%s\"",
150 desc48_get_type(p_desc), psz_provider, psz_service);
151 }
152 free(psz_provider);
153 free(psz_service);
154 }
155
156 #ifdef __cplusplus
157 }
158 #endif
159
160 #endif
161