Creating a Sound Board

This example script shows how to send a sound file to a voice channel. A few shortcuts are taken here, for more advanced techniques for connecting to a voice channel see the tutorial Join or switch to the voice channel of the user issuing a command

#include <dpp/dpp.h>
#include <iomanip>
#include <sstream>
 
int main(int argc, char const *argv[])
{
    /* Load a sound file called Robot.pcm into memory.
     * The bot expects PCM format, which are raw sound data,
     * 2 channel stereo, 16 bit signed 48000Hz.
     * 
     * You can use audacity to export these from WAV or MP3 etc.
     * 
     * If you wanted to send a more complicated format, you could
     * use a separate library to decode that audio to PCM. For
     * example purposes, a raw PCM will suffice. This PCM file can
     * be found within the bot's github repo.
     */
    uint8_t* robot = nullptr;
    size_t robot_size = 0;
    std::ifstream input ("../testdata/Robot.pcm", std::ios::in|std::ios::binary|std::ios::ate);
    if (input.is_open()) {
        robot_size = input.tellg();
        robot = new uint8_t[robot_size];
        input.seekg (0, std::ios::beg);
        input.read ((char*)robot, robot_size);
        input.close();
    }
 
    /* Setup the bot */
    dpp::cluster bot("token");
 
    /* Use the on_message_create event to look for commands */
    bot.on_message_create([&bot, robot, robot_size](const dpp::message_create_t & event) {
 
        std::stringstream ss(event.msg->content);
        std::string command;
 
        ss >> command;
 
        /* Tell the bot to join the discord voice channel the user is on. Syntax: .join */
        if (command == ".join") {
            dpp::guild * g = dpp::find_guild(event.msg->guild_id);
            if (!g->connect_member_voice(event.msg->author->id)) {
                bot.message_create(dpp::message(channel_id, "You don't seem to be on a voice channel! :("));
            }
        }
 
        /* Tell the bot to play the sound file 'Robot.pcm'. Syntax: .robot */
        if (command == ".robot") {
            dpp::voiceconn* v = event.from->get_voice(event.msg->guild_id);
            if (v && v->voiceclient && v->voiceclient->is_ready()) {
                v->voiceclient->send_audio((uint16_t*)robot, robot_size);
            }
        }
    });
 
    /* Start bot */
    bot.start(false);
    return 0;
}