1 /*
2 * Copyright (c) 2017 The Linux Foundation. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *    * Redistributions of source code must retain the above copyright
8 *      notice, this list of conditions and the following disclaimer.
9 *    * Redistributions in binary form must reproduce the above
10 *      copyright notice, this list of conditions and the following
11 *      disclaimer in the documentation and/or other materials provided
12 *      with the distribution.
13 *    * Neither the name of The Linux Foundation. nor the names of its
14 *      contributors may be used to endorse or promote products derived
15 *      from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29 #ifndef QHDMI_CEC_H
30 #define QHDMI_CEC_H
31 
32 #include <hardware/hdmi_cec.h>
33 #include <sys/poll.h>
34 #include <sys/prctl.h>
35 #include <sys/socket.h>
36 #include <sys/resource.h>
37 #include <linux/netlink.h>
38 #include <thread>
39 #include <vector>
40 
41 namespace qhdmicec {
42 
43 static const int MAX_STRING_LENGTH = 1024;
44 
45 struct cec_callback_t {
46     // Function in HDMI service to call back on CEC messages
47     event_callback_t callback_func;
48     // This stores the object to pass back to the framework
49     void* callback_arg;
50 
51 };
52 
53 struct eventData;
54 
55 struct cec_context_t {
56     hdmi_cec_device_t device;    // Device for HW module
57     cec_callback_t callback;     // Struct storing callback object
58     bool enabled;
59     bool arc_enabled;
60     bool system_control;         // If true, HAL/driver handle CEC messages
61     int fb_num;                  // Framebuffer node for HDMI
62     std::string fb_sysfs_path;
63     hdmi_port_info *port_info;   // HDMI port info
64 
65     // Logical address is stored in an array, the index of the array is the
66     // logical address and the value in the index shows whether it is set or not
67     int logical_address[CEC_ADDR_BROADCAST];
68     int version;
69     uint32_t vendor_id;
70 
71     std::vector<pollfd> poll_fds;               // poll fds for cec message monitor and exit signal
72                                                 // on cec message monitor thread
73     int exit_fd = -1;
74     bool cec_exit_thread = false;
75     std::thread hdmi_cec_monitor;               // hdmi plugin monitor thread variable
76     char data[MAX_STRING_LENGTH] = {0};
77 
78     std::vector<std::string> node_list = {};
79     std::vector<eventData> event_data_list = {};
80 };
81 
82 struct eventData {
83     const char* event_name = NULL;
84     void (*event_parser)(cec_context_t* ctx, uint32_t node_event) = NULL;
85 };
86 
87 void cec_receive_message(cec_context_t *ctx, char *msg, ssize_t len);
88 void cec_hdmi_hotplug(cec_context_t *ctx, int connected);
89 
90 }; //namespace
91 #endif /* end of include guard: QHDMI_CEC_H */
92