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si_ea.c

Last change on this file was 2, checked in by jglee, 11 years ago
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1	/***************************************************************
2	**
3	** Broadcom Corp. Confidential
4	** Copyright 2003-2008 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_ea.c
12	** Description: function that parses the EA message
13	**
14	** Created: 03/08/2001
15	**
16	** REVISION:
17	**
18	** $Log: $
19	**
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_ea.h"
28	#include "si_api_ea.h"
29	#include "si_descriptors.h"
30
31	static unsigned char ea_sequence_number, ea_flags = 0;
32
33
34	EA_MSG_INFO ea_msg;
35
36	#define EA_FLAGS_SEQ_NUM_VALID 0x01
37	#define EA_FLAGS_EVENT_ID_VALID 0x02
38
39	void SI_EA_Init (void)
40	{
41	}
42
43	/*********************************************************************
44	Function : SI_EA_GetEventTime
45	Description : Function to get event start time and duration
46	Input : p_ea_start_time - pointer to store start time
47	: p_ea_duration - pointer to store duration
48	Output : none.
49	**********************************************************************/
50	void SI_EA_GetEventTime (unsigned long p_ea_start_time, unsigned short p_ea_duration)
51	{
52	*p_ea_start_time = ea_msg.ea_event_start_time;
53	*p_ea_duration = ea_msg.ea_event_duration;
54	}
55
56	/*********************************************************************
57	Function : SI_EA_GetEventTime
58	Description : Callback function when an event expires
59	Input : none.
60	Output : none.
61	**********************************************************************/
62	void SI_EA_EventExpirationCb (void)
63	{
64	ea_flags &= ~EA_FLAGS_EVENT_ID_VALID;
65	}
66
67	/*********************************************************************
68	Function : SI_EA_parse
69	Description : Function to parse the EA message
70	Input : ea_table, point to the EA message data
71	Output : Success code.
72	**********************************************************************/
73	SI_RET_CODE SI_EA_Parse (unsigned char * ea_table)
74	{
75	int i;
76	unsigned char temp, eas_event_code_length, nature_of_act_text_length;
77	unsigned short temp16;
78	unsigned short ea_alert_text_length, ea_descriptors_length;
79	unsigned long temp32, ea_byte_index;
80	unsigned long section_length;
81
82	SI_DBG_PRINT(E_SI_DBG_MSG,("EA Message received.\n"));
83
84	ea_msg.process = 1;
85
86	temp = *ea_table;
87	if (temp != SI_EA_TABLE_ID)
88	{
89	ea_msg.process = 0;
90	SI_DBG_PRINT(E_SI_ERR_MSG,("EA Table ID error!!! %x\n", temp));
91	return SI_TABLE_ID_ERROR;
92	}
93
94	/*
95	* Get section length
96	*/
97	section_length = SI_Construct_Data(ea_table,
98	EA_SECTION_LENGTH_BYTE_INDX,
99	EA_SECTION_LENGTH_BYTE_NUM,
100	EA_SECTION_LENGTH_SHIFT,
101	EA_SECTION_LENGTH_MASK);
102	section_length += EA_SECTION_LENGTH_BYTE_INDX+EA_SECTION_LENGTH_BYTE_NUM;
103	if (section_length > SI_NORMAL_SECTION_LENGTH)
104	{
105	ea_msg.process = 0;
106	SI_DBG_PRINT(E_SI_ERR_MSG,("EA Table section length error!!! %x\n", section_length));
107	return SI_SECTION_LENGTH_ERROR;
108	}
109	SI_DBG_PRINT(E_SI_DBG_MSG,("EA Table section length = %d\n", section_length));
110
111	#if 0
112	printf("Data:");
113	for (i=0; i < section_length; i++)
114	{
115	if (!(i & 0x0f)) printf("\n");
116	printf("%02x ", ea_table[i]);
117	}
118	printf("\n");
119	#endif
120
121	/*
122	* Check table id extension
123	*/
124	temp = SI_Construct_Data(ea_table,
125	EA_TABLE_ID_EXTENSION_BYTE_INDX,
126	EA_TABLE_ID_EXTENSION_BYTE_NUM,
127	EA_TABLE_ID_EXTENSION_SHIFT,
128	EA_TABLE_ID_EXTENSION_MASK);
129	if (temp != 0)
130	{
131	ea_msg.process = 0;
132	SI_DBG_PRINT(E_SI_ERR_MSG,("EA Table ID extension error!!! %x\n", temp));
133	return SI_TABLE_ID_ERROR;
134	}
135
136	/*
137	* Check protocol version
138	*/
139	temp = SI_Construct_Data(ea_table,
140	EA_PROTOCOL_VERSION_BYTE_INDX,
141	EA_PROTOCOL_VERSION_BYTE_NUM,
142	EA_PROTOCOL_VERSION_SHIFT,
143	EA_PROTOCOL_VERSION_MASK);
144	if (temp != 0) /* only support protocol version 0 */
145	{
146	ea_msg.process = 0;
147	SI_DBG_PRINT(E_SI_ERR_MSG,("EA Table PROTOCOL version error!!! %x\n", temp));
148	return SI_PROTOCOL_VER_ERROR;
149	}
150
151	/*
152	* Get sequence number
153	*/
154	temp32 = SI_Construct_Data(ea_table,
155	EA_SEQUENCE_NUMBER_BYTE_INDX,
156	EA_SEQUENCE_NUMBER_BYTE_NUM,
157	EA_SEQUENCE_NUMBER_SHIFT,
158	EA_SEQUENCE_NUMBER_MASK);
159
160	if ((ea_flags & EA_FLAGS_SEQ_NUM_VALID) && (temp32 == ea_sequence_number))
161	{
162	ea_msg.process = 0;
163	SI_DBG_PRINT(E_SI_ERR_MSG,("Duplicate sequence number %x, discarding message\n", temp32));
164	return SI_SUCCESS;
165	}
166
167	ea_flags \|= EA_FLAGS_SEQ_NUM_VALID;
168	ea_sequence_number = temp32;
169	SI_DBG_PRINT(E_SI_DBG_MSG,("EA Table sequence number = %x\n", ea_sequence_number));
170
171	/*
172	* Get Event ID
173	*/
174	temp16 = SI_Construct_Data(ea_table,
175	EA_EAS_EVENT_ID_BYTE_INDX,
176	EA_EAS_EVENT_ID_BYTE_NUM,
177	EA_EAS_EVENT_ID_SHIFT,
178	EA_EAS_EVENT_ID_MASK);
179	if ((ea_flags & EA_FLAGS_EVENT_ID_VALID) && (temp32 == ea_msg.eas_event_id))
180	{
181	ea_msg.process = 0;
182	SI_DBG_PRINT(E_SI_ERR_MSG,("Duplicate event id %x, discarding message\n", temp16));
183	return SI_SUCCESS;
184	}
185
186	ea_flags \|= EA_FLAGS_EVENT_ID_VALID;
187	ea_msg.eas_event_id = temp16;
188	SI_DBG_PRINT(E_SI_DBG_MSG,("EA event id = %x\n", ea_msg.eas_event_id));
189
190	/*
191	* Get EAS originator code
192	*/
193	ea_msg.eas_originator_code[0] = ea_table[EA_EAS_ORIGINATOR_CODE_BYTE_INDX];
194	ea_msg.eas_originator_code[1] = ea_table[EA_EAS_ORIGINATOR_CODE_BYTE_INDX + 1];
195	ea_msg.eas_originator_code[2] = ea_table[EA_EAS_ORIGINATOR_CODE_BYTE_INDX + 2];
196	ea_msg.eas_originator_code[3] = (char)NULL;
197	SI_DBG_PRINT(E_SI_DBG_MSG,("EAS originator code = %s\n", ea_msg.eas_originator_code));
198
199	/*
200	* Get EAS event code
201	*/
202	eas_event_code_length = SI_Construct_Data(ea_table,
203	EA_EAS_EVENT_CODE_LENGTH_BYTE_INDX,
204	EA_EAS_EVENT_CODE_LENGTH_BYTE_NUM,
205	EA_EAS_EVENT_CODE_LENGTH_SHIFT,
206	EA_EAS_EVENT_CODE_LENGTH_MASK);
207
208	/*
209	* Get EAS event code
210	*/
211	for (i=0; i < eas_event_code_length; i++)
212	ea_msg.eas_event_code[i] = ea_table[EA_EAS_EVENT_CODE_BYTE_INDX + i];
213	ea_msg.eas_event_code[i] = (char)NULL;
214	SI_DBG_PRINT(E_SI_DBG_MSG,("EAS event code = %s\n", ea_msg.eas_event_code));
215
216	ea_byte_index = EA_EAS_EVENT_CODE_BYTE_INDX + eas_event_code_length;
217	SI_DBG_PRINT(E_SI_DBG_MSG,("EA byte index = %d\n", ea_byte_index));
218
219	/*
220	* Get nature of activation text fields
221	*/
222	nature_of_act_text_length = ea_table[ea_byte_index++];
223	SI_DBG_PRINT(E_SI_DBG_MSG,("Nature of activation text length = %d\n", nature_of_act_text_length));
224	if (nature_of_act_text_length)
225	{
226	SI_DBG_PRINT(E_SI_DBG_MSG,("Nature of activation text = "));
227	for (i=0; i < nature_of_act_text_length; i++)
228	{
229	ea_msg.nature_of_act_text[i] = ea_table[ea_byte_index++];
230	SI_DBG_PRINT(E_SI_DBG_MSG,("%c", ea_msg.nature_of_act_text[i]));
231	}
232	SI_DBG_PRINT(E_SI_DBG_MSG,("\n"));
233	ea_msg.nature_of_act_text[i] = (char)NULL;
234	}
235	else
236	ea_msg.nature_of_act_text[0] = (char)NULL;
237
238	/*
239	* Alert message time remaining
240	*/
241	ea_msg.ea_alert_message_time_rem = ea_table[ea_byte_index++];
242	SI_DBG_PRINT(E_SI_DBG_MSG,("Alert message time remaining = %d\n", ea_msg.ea_alert_message_time_rem));
243
244	/*
245	* Event start time
246	*/
247	ea_msg.ea_event_start_time = SI_Construct_Data(ea_table, ea_byte_index, 4, 0, 0xffffffff);
248	SI_DBG_PRINT(E_SI_DBG_MSG,("Event start time = %x\n", ea_msg.ea_event_start_time));
249	ea_byte_index += 4;
250
251	/*
252	* Event duration
253	*/
254	ea_msg.ea_event_duration = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0xffff);
255	SI_DBG_PRINT(E_SI_DBG_MSG,("Event duration = %x\n", ea_msg.ea_event_duration));
256	ea_byte_index += 2;
257
258	/*
259	* Alert priority
260	*/
261	ea_msg.ea_alert_priority = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0x000f);
262	SI_DBG_PRINT(E_SI_DBG_MSG,("Alert priority = %x\n", ea_msg.ea_alert_priority));
263	ea_byte_index += 2;
264
265	/*
266	* Details OOB source ID
267	*/
268	ea_msg.ea_details_oob_source_id = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0xffff);
269	SI_DBG_PRINT(E_SI_DBG_MSG,("Details OOB source id = %x\n", ea_msg.ea_details_oob_source_id));
270	ea_byte_index += 2;
271
272	/*
273	* Details major channel number
274	*/
275	ea_msg.ea_details_major_chan_number = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0x03ff);
276	SI_DBG_PRINT(E_SI_DBG_MSG,("Details major channel number = %x\n", ea_msg.ea_details_major_chan_number));
277	ea_byte_index += 2;
278
279	/*
280	* Details minor channel number
281	*/
282	ea_msg.ea_details_minor_chan_number = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0x03ff);
283	SI_DBG_PRINT(E_SI_DBG_MSG,("Details minor channel number = %x\n", ea_msg.ea_details_minor_chan_number));
284	ea_byte_index += 2;
285
286	/*
287	* Audio OOB source id
288	*/
289	ea_msg.ea_audio_oob_source_id = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0xffff);
290	SI_DBG_PRINT(E_SI_DBG_MSG,("Audio OOB source id = %x\n", ea_msg.ea_audio_oob_source_id));
291	ea_byte_index += 2;
292
293	/*
294	* Alert text length, alert text
295	*/
296	ea_alert_text_length = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0xffff);
297	SI_DBG_PRINT(E_SI_DBG_MSG,("Alert text length = %x\n", ea_alert_text_length));
298	ea_byte_index += 2;
299	if (ea_alert_text_length)
300	{
301	SI_DBG_PRINT(E_SI_DBG_MSG,("EA alert text = "));
302	for (i=0; i < ea_alert_text_length; i++)
303	{
304	ea_msg.ea_alert_text[i] = ea_table[ea_byte_index++];
305	SI_DBG_PRINT(E_SI_DBG_MSG,("%c", ea_msg.ea_alert_text[i]));
306	}
307	SI_DBG_PRINT(E_SI_DBG_MSG,("\n"));
308	ea_msg.ea_alert_text[i] = (char)NULL;
309	}
310	else
311	ea_msg.ea_alert_text[0] = (char)NULL;
312
313	/*
314	* Location code
315	*/
316	ea_msg.ea_location_code_count = SI_Construct_Data(ea_table, ea_byte_index, 1, 0, 0xff);
317	SI_DBG_PRINT(E_SI_DBG_MSG,("Location code count = %x\n", ea_msg.ea_location_code_count));
318	ea_byte_index++;
319
320	if (ea_msg.ea_location_code_count)
321	{
322	/* Get location codes */
323	for (i=0; i < ea_msg.ea_location_code_count; i++)
324	{
325	ea_msg.ea_location_code[i].state_code = SI_Construct_Data(ea_table, ea_byte_index, 1, 0, 0xff);
326	ea_byte_index++;
327	ea_msg.ea_location_code[i].county_subdevision = SI_Construct_Data(ea_table, ea_byte_index, 1, 4, 0x0f);
328	ea_msg.ea_location_code[i].county_code = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0x03ff);
329	ea_byte_index += 2;
330	SI_DBG_PRINT(E_SI_DBG_MSG,(" Location code %d state_code = %x\n", i, ea_msg.ea_location_code[i].state_code));
331	SI_DBG_PRINT(E_SI_DBG_MSG,(" Location code %d county_subdevision = %x\n", i, ea_msg.ea_location_code[i].county_subdevision));
332	SI_DBG_PRINT(E_SI_DBG_MSG,(" Location code %d county_code = %x\n", i, ea_msg.ea_location_code[i].county_code));
333	}
334	}
335
336	/*
337	* Exceptions
338	*/
339	ea_msg.ea_exception_count = SI_Construct_Data(ea_table, ea_byte_index, 1, 0, 0xff);
340	SI_DBG_PRINT(E_SI_DBG_MSG,("Exception count = %x\n", ea_msg.ea_exception_count));
341	ea_byte_index++;
342	if (ea_msg.ea_exception_count)
343	{
344	temp = SI_Construct_Data(ea_table, ea_byte_index, 1, 0, 0xff);
345	ea_byte_index++;
346	if (temp & 0x80) /* if inband reference */
347	{
348	for (i=0; i < ea_msg.ea_exception_count; i++)
349	{
350	ea_msg.ea_exception_major_chan_no[i] = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0x03ff);
351	ea_byte_index += 2;
352	ea_msg.ea_exception_minor_chan_no[i] = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0x03ff);
353	ea_byte_index += 2;
354	}
355	}
356	else /* out of band */
357	{
358	for (i=0; i < ea_msg.ea_exception_count; i++)
359	{
360	ea_byte_index += 2;
361	ea_msg.ea_exception_oob_source_id[i] = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0xffff);
362	ea_byte_index += 2;
363	}
364	}
365	}
366
367	/*
368	* Descriptors
369	*/
370	ea_descriptors_length = SI_Construct_Data(ea_table, ea_byte_index, 2, 0, 0x03ff);
371	SI_DBG_PRINT(E_SI_DBG_MSG,("Descriptors length = %x\n", ea_descriptors_length));
372	ea_byte_index += 2;
373	if (ea_descriptors_length)
374	{
375	unsigned char desc_tag, desc_length;
376	unsigned long company_id;
377
378	desc_tag = ea_table[ea_byte_index++];
379	if (desc_tag >= 0xc0)
380	{
381	/*
382	* User private descriptor
383	*/
384	desc_length = ea_table[ea_byte_index++];
385	company_id = SI_Construct_Data(ea_table, ea_byte_index, 3, 0, 0xffffff);
386	ea_byte_index += 3;
387	for (i=0; i < desc_length; i++)
388	{
389	/* private data */
390	}
391	}
392	else
393	{
394	/*
395	* Standard descriptor
396	*/
397	}
398	}
399
400	/*
401	* Call application callback to let them know an EA message has been received
402	*/
403	EA_message_received_cb(&ea_msg);
404
405	return SI_SUCCESS;
406	}
407

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source: svn/trunk/newcon3bcm2_21bu/BSEAV/lib/scte65/ea/si_ea.c

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