source: svn/trunk/newcon3bcm2_21bu/BSEAV/lib/si/a56/ntm/si_ntm.c

Last change on this file was 2, checked in by jglee, 11 years ago

first commit
  • Property svn:executable set to *
File size: 7.4 KB
Line 
1/***************************************************************
2**
3** Broadcom Corp. Confidential
4** Copyright 2003-2012 Broadcom Corp. All Rights Reserved.
5**
6** THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED
7** SOFTWARE LICENSE AGREEMENT BETWEEN THE USER AND BROADCOM.
8** YOU HAVE NO RIGHT TO USE OR EXPLOIT THIS MATERIAL EXCEPT
9** SUBJECT TO THE TERMS OF SUCH AN AGREEMENT.
10**
11** File:                si_ntm.c
12** Description: function that parses the NTM table sections.
13**
14** Created: 03/08/2001
15**                      02/01/2012 modified for A56 support
16**
17** REVISION:
18**
19** $Log: $
20**
21**
22****************************************************************/
23#include "si.h"
24#include "si_os.h"
25#include "si_dbg.h"
26#include "si_util.h"
27#include "si_list.h"
28#include "si_descriptors.h"
29#include "si_transmission_medium.h"
30
31#include "si_ntm.h"
32#include "si_ntm_snt.h"
33
34unsigned char NTM_SNT_version_number;
35unsigned char NTM_SNT_last_section_number;
36unsigned long NTM_SNT_section_mask[8];
37unsigned long NTM_SNT_Language_Code;
38static SI_NTM_SNT_Callback_t *s_snt_cb = NULL;
39
40void SI_NTM_Init(
41        SI_NTM_SNT_Callback_t *cb, 
42        unsigned char iNTM_SNT_version_number
43)
44{
45        int i;
46
47        s_snt_cb = cb;
48        SI_NTM_SNT_Init(s_snt_cb);
49        NTM_SNT_version_number = iNTM_SNT_version_number;
50        for (i=0; i<8; i++)
51                NTM_SNT_section_mask[i] = 0;
52}
53
54/*********************************************************************
55 Function : SI_NTM_Get
56 Description : Return the version numbers and masks.
57 Input : none.
58 Output : version number and pointers to section masks.
59**********************************************************************/
60bool SI_NTM_SNT_Complete(void)
61{
62        return (SI_Chk_Section_complete(NTM_SNT_section_mask,NTM_SNT_last_section_number) == SI_SUCCESS);
63}
64
65/*********************************************************************
66 Function : SI_NTM_parse
67 Description : Function to parse the NTM table.
68 Input : unsigned char * table: point to the current NTM table section.
69 Output : SI_RET_CODE.
70**********************************************************************/
71SI_RET_CODE SI_NTM_parse (unsigned char * table)
72{
73        unsigned long temp;
74        unsigned long section_length;
75        unsigned char table_type;
76        unsigned long desc_tag, len;
77        unsigned char version_number, section_number, last_section_number;
78        unsigned char *current, *crc_start;
79    int found_rdd;
80       
81        found_rdd = 0;
82        SI_DBG_PRINT(E_SI_DBG_MSG,("NTM Table received.\n"));
83
84        temp = *table;
85        if (temp != SI_NTM_TABLE_ID)
86        {
87                SI_DBG_PRINT(E_SI_ERR_MSG,("NTM Table ID error!!! %x\n", temp));
88                return SI_TABLE_ID_ERROR;
89        }
90
91        /* calculate and check section length. */
92        section_length = SI_Construct_Data(table, 
93                NTM_SECTION_LENGTH_BYTE_INDX,
94                NTM_SECTION_LENGTH_BYTE_NUM,
95                NTM_SECTION_LENGTH_SHIFT,
96                NTM_SECTION_LENGTH_MASK);
97        section_length += NTM_SECTION_LENGTH_BYTE_INDX+NTM_SECTION_LENGTH_BYTE_NUM;
98        if (section_length > SI_NORMAL_SECTION_LENGTH)
99        {
100                SI_DBG_PRINT(E_SI_ERR_MSG,("NTM Table section length error!!! %x\n", section_length));
101                return SI_SECTION_LENGTH_ERROR;
102        }
103       
104        /* We do the CRC check here to verify the contents of this section. */
105        if (SI_CRC32_Check(table, section_length) != SI_SUCCESS)
106        {
107                SI_DBG_PRINT(E_SI_ERR_MSG,("NTM Table section CRC error!!!\n"));
108                return SI_CRC_ERROR;
109        }
110       
111        /* check protocol version. It should be zero for now. */
112        temp = SI_Construct_Data(table, 
113                NTM_PROTOCOL_VERSION_BYTE_INDX,
114                NTM_PROTOCOL_VERSION_BYTE_NUM,
115                NTM_PROTOCOL_VERSION_SHIFT,
116                NTM_PROTOCOL_VERSION_MASK);
117        if (temp != SI_CURRENT_PROTOCOL_VERSION)
118        {
119                SI_DBG_PRINT(E_SI_ERR_MSG,("NTM Table PROTOCOL version error!!! %x\n", temp));
120                return SI_PROTOCOL_VER_ERROR;
121        }
122       
123        /* currently just support cable */
124        temp = SI_Construct_Data(table, 
125                NTM_TRANSMISSION_MEDIUM_CODE_BYTE_INDX,
126                NTM_TRANSMISSION_MEDIUM_CODE_BYTE_NUM,
127                NTM_TRANSMISSION_MEDIUM_CODE_SHIFT,
128                NTM_TRANSMISSION_MEDIUM_CODE_MASK);
129        if (TRANSMISSION_MEDIUM_CABLE != temp) {
130                SI_DBG_PRINT(E_SI_ERR_MSG,("Unsupported transmission medium type %d\n", temp));
131                return SI_NOT_SUPPORTED_ERROR;
132        }
133
134        /* RLQ, TODO support MNT, RRT and RST? */
135        table_type = SI_Construct_Data(table, 
136                NTM_TABLE_TYPE_BYTE_INDX,
137                NTM_TABLE_TYPE_BYTE_NUM,
138                NTM_TABLE_TYPE_SHIFT,
139                NTM_TABLE_TYPE_MASK);
140        if (table_type != NTM_TT_SNT)
141        {
142#ifdef  USE_SCTE65_SI
143                /* SCTE65 use different table type for SNT */
144                if (6 != table_type)
145#endif
146                {
147                        SI_DBG_PRINT(E_SI_ERR_MSG,("We can only handle SNT of NTM right now.\n"));
148                        return SI_TABLE_TYPE_ERROR;
149                }
150        }
151
152        /* we get a SNT record. see if we have any table level
153                descriptors for revision dectection. */
154        current = table + NTM_TABLE_TYPE_BYTE_INDX + NTM_TABLE_TYPE_BYTE_NUM;
155
156        /* point to the start of table level descriptor. */
157        current = SI_NTM_SNT_Pointer(current);
158        crc_start = table + section_length - SI_CRC_LENGTH;
159
160        SI_DBG_PRINT(E_SI_ERR_MSG,("table %x, current %x, crc_start %x\n", table, current, crc_start));
161        /* go through all descriptors. */
162        while ((unsigned long)current < (unsigned long)crc_start)
163        {
164                desc_tag = *(current++);
165                len = *(current++);
166                switch(desc_tag)
167                {
168                        case SI_DESC_REVISION_DETECTION:
169                                /* we got a revision dectection descriptor. */
170                                found_rdd = 1;
171                                SI_DBG_PRINT(E_SI_DBG_MSG,("NTM SNT revision detection descriptors found.\n"));
172                                version_number = SI_Construct_Data( current, 
173                                        DESC_REV_DECTECT_VER_NUM_BYTE_INDEX,
174                                        DESC_REV_DECTECT_VER_NUM_BYTE_NUM,
175                                        DESC_REV_DECTECT_VER_NUM_SHIFT,
176                                        DESC_REV_DECTECT_VER_NUM_MASK);
177                                section_number = SI_Construct_Data( current, 
178                                        DESC_REV_DECTECT_SEC_NUM_BYTE_INDEX,
179                                        DESC_REV_DECTECT_SEC_NUM_BYTE_NUM,
180                                        DESC_REV_DECTECT_SEC_NUM_SHIFT,
181                                        DESC_REV_DECTECT_SEC_NUM_MASK);
182                                last_section_number = SI_Construct_Data( current, 
183                                        DESC_REV_DECTECT_LAST_SEC_NUM_BYTE_INDEX,
184                                        DESC_REV_DECTECT_LAST_SEC_NUM_BYTE_NUM,
185                                        DESC_REV_DECTECT_LAST_SEC_NUM_SHIFT,
186                                        DESC_REV_DECTECT_LAST_SEC_NUM_MASK);
187                                NTM_SNT_last_section_number = last_section_number;
188                                if (version_number == NTM_SNT_version_number)
189                                {
190                                        /* same version number, check section mask. */
191                                        if (SI_Chk_Section_mask(NTM_SNT_section_mask, section_number))
192                                                return SI_SUCCESS;              /* no need to update. */
193                                }
194                                else
195                                {
196                                        /* different CDS version, init the CDS table and section mask .*/
197                                        SI_NTM_SNT_Free_List();
198                                        NTM_SNT_version_number = version_number;
199                                        SI_Init_Section_Mask(NTM_SNT_section_mask, last_section_number);
200                                }
201                                /* update the mask */
202                                SI_Set_Section_mask(NTM_SNT_section_mask, section_number);
203                        break;
204
205                        default:
206                                SI_DBG_PRINT(E_SI_WRN_MSG,("NTM SNT table descriptor %x received! Ignoring!\n", desc_tag));
207                        break;
208                }
209
210                /* update pointer. */
211                current += len;
212        }
213
214        /* check for desc length. */
215        if ((unsigned long)current != (unsigned long)crc_start)
216        {
217                SI_DBG_PRINT(E_SI_ERR_MSG,("NTM Table length error!!!\n"));
218                return SI_SECTION_LENGTH_ERROR;
219        }
220
221        if (found_rdd == 0)
222        {
223#ifdef CONFIG_RDD_REQUIRED
224                SI_DBG_PRINT(E_SI_ERR_MSG,("Revistion Detection Descriptor is required!!!\n"));
225                return SI_DESCRIPTOR_ERROR;
226#else
227                /* if there is no version descriptor, set complete flag then */
228                NTM_SNT_last_section_number = 0;
229                SI_Set_Section_mask(NTM_SNT_section_mask, 0);
230#endif
231        }
232
233        /* we either need to update the channel table or we don't have a revision detection. */
234        NTM_SNT_Language_Code = SI_Construct_Data(table, 
235                NTM_ISO_639_CODE_BYTE_INDX,
236                NTM_ISO_639_CODE_BYTE_NUM,
237                NTM_ISO_639_CODE_SHIFT,
238                NTM_ISO_639_CODE_MASK);
239
240        current = table + NTM_TABLE_TYPE_BYTE_INDX + NTM_TABLE_TYPE_BYTE_NUM;
241        return SI_NTM_SNT_Parse(current,NTM_SNT_Language_Code);
242}
243
Note: See TracBrowser for help on using the repository browser.