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Add ts_get_ecm_info() and ts_get_emm_info()

Georgi Chorbadzhiyski 9 years ago
parent
commit
14babc9c76
2 changed files with 31 additions and 0 deletions
  1. 3
    0
      tsfuncs.h
  2. 28
    0
      tsfuncs_cat.c

+ 3
- 0
tsfuncs.h View File

@@ -117,6 +117,9 @@ int				ts_cat_is_same		(struct ts_cat *cat1, struct ts_cat *cat2);
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 enum CA_system	ts_get_CA_sys		(uint16_t CA_id);
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 char *			ts_get_CA_sys_txt	(enum CA_system CA_sys);
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+int				ts_get_emm_info		(struct ts_cat *cat, enum CA_system CA_sys, uint16_t *CA_id, uint16_t *CA_pid);
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+int				ts_get_ecm_info		(struct ts_pmt *pmt, enum CA_system CA_sys, uint16_t *CA_id, uint16_t *CA_pid);
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+
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 // PMT
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 struct ts_pmt *	ts_pmt_alloc		();
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 struct ts_pmt * ts_pmt_alloc_init	(uint16_t org_network_id, uint16_t transport_stream_id);

+ 28
- 0
tsfuncs_cat.c View File

@@ -209,3 +209,31 @@ char * ts_get_CA_sys_txt(enum CA_system CA_sys) {
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 	}
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 }
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+static int find_CA_descriptor(uint8_t *data, int data_len, enum CA_system req_CA_type, uint16_t *CA_id, uint16_t *CA_pid) {
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+	while (data_len >= 2) {
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+		uint8_t tag         = data[0];
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+		uint8_t this_length = data[1];
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+		data     += 2;
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+		data_len -= 2;
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+		if (tag == 9 && this_length == 4) {
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+			uint16_t CA_ID = (data[0] << 8) | data[1];
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+			uint16_t CA_PID = ((data[2] & 0x1F) << 8) | data[3];
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+			if (ts_get_CA_sys(CA_ID) == req_CA_type) {
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+				*CA_id = CA_ID;
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+				*CA_pid = CA_PID;
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+				return 1;
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+			}
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+		}
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+		data_len -= this_length;
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+		data += this_length;
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+	}
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+	return 0;
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+}
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+
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+int ts_get_emm_info(struct ts_cat *cat, enum CA_system req_CA_type, uint16_t *CA_id, uint16_t *CA_pid) {
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+	return find_CA_descriptor(cat->program_info, cat->program_info_size, req_CA_type, CA_id, CA_pid);
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+}
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+
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+int ts_get_ecm_info(struct ts_pmt *pmt, enum CA_system req_CA_type, uint16_t *CA_id, uint16_t *CA_pid) {
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+	return find_CA_descriptor(pmt->program_info, pmt->program_info_size, req_CA_type, CA_id, CA_pid);
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+}

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