hdmi_cec/qhdmi_cec.h

/*
* Copyright (c) 2017 The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
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*      notice, this list of conditions and the following disclaimer.
*    * Redistributions in binary form must reproduce the above
*      copyright notice, this list of conditions and the following
*      disclaimer in the documentation and/or other materials provided
*      with the distribution.
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*      contributors may be used to endorse or promote products derived
*      from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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*/
#ifndef QHDMI_CEC_H
#define QHDMI_CEC_H

#include <hardware/hdmi_cec.h>
#include <sys/poll.h>
#include <sys/prctl.h>
#include <sys/socket.h>
#include <sys/resource.h>
#include <linux/netlink.h>
#include <thread>
#include <vector>

namespace qhdmicec {

static const int MAX_STRING_LENGTH = 1024;

struct cec_callback_t {
    // Function in HDMI service to call back on CEC messages
    event_callback_t callback_func;
    // This stores the object to pass back to the framework
    void* callback_arg;

};

struct eventData;

struct cec_context_t {
    hdmi_cec_device_t device;    // Device for HW module
    cec_callback_t callback;     // Struct storing callback object
    bool enabled;
    bool arc_enabled;
    bool system_control;         // If true, HAL/driver handle CEC messages
    int fb_num;                  // Framebuffer node for HDMI
    std::string fb_sysfs_path;
    hdmi_port_info *port_info;   // HDMI port info

    // Logical address is stored in an array, the index of the array is the
    // logical address and the value in the index shows whether it is set or not
    int logical_address[CEC_ADDR_BROADCAST];
    int version;
    uint32_t vendor_id;

    std::vector<pollfd> poll_fds;               // poll fds for cec message monitor and exit signal
                                                // on cec message monitor thread
    int exit_fd = -1;
    bool cec_exit_thread = false;
    std::thread hdmi_cec_monitor;               // hdmi plugin monitor thread variable
    char data[MAX_STRING_LENGTH] = {0};

    std::vector<std::string> node_list = {};
    std::vector<eventData> event_data_list = {};
};

struct eventData {
    const char* event_name = NULL;
    void (*event_parser)(cec_context_t* ctx, uint32_t node_event) = NULL;
};

void cec_receive_message(cec_context_t *ctx, char *msg, ssize_t len);
void cec_hdmi_hotplug(cec_context_t *ctx, int connected);

}; //namespace
#endif /* end of include guard: QHDMI_CEC_H */