Record Yourself in a VC

DPP supports receiving audio. This example shows how to use it to record some user in a VC.

Note

Voice receiving by bots is not officially supported by the Discord API. We cannot guarantee that this feature will work in the future.

#include <dpp/dpp.h>
#include <iomanip>
#include <sstream>
 
int main() {
    /* Example to record a user in a VC
    * 
    * Recording is output as './me.pcm' and you can play it via the soundboard example
    * or use ffmpeg 'ffplay -f s16le -ar 48000 -ac 2 -i ./me.pcm'
    */
 
    /* Replace with the user's id you wish to record */
    dpp::snowflake user_id = 407877550216314882;
 
    /* Setup the bot */
    dpp::cluster bot("token");
 
    FILE *fd;
    fd = fopen("./me.pcm", "wb");
 
    bot.on_log(dpp::utility::cout_logger());
 
    /* The event is fired when someone issues your commands */
    bot.on_slashcommand([&bot, &fd](const dpp::slashcommand_t& event) {
        /* Check which command they ran */
        if (event.command.get_command_name() == "record") {
            /* Get the guild */
            dpp::guild* g = dpp::find_guild(event.command.guild_id);
 
            /* Attempt to connect to a voice channel, returns false if we fail to connect. */
            if (!g->connect_member_voice(*event.owner, event.command.get_issuing_user().id)) {
                event.reply("You don't seem to be in a voice channel!");
                return;
            }
            
            /* Tell the user we joined their channel. */
            event.reply("Joined your channel, now recording!");
        } else if (event.command.get_command_name() == "stop") {
            event.from()->disconnect_voice(event.command.guild_id);
            fclose(fd);
 
            event.reply("Stopped recording.");
        }
    });
 
    bot.on_voice_receive([&bot, &fd, &user_id](const dpp::voice_receive_t &event) {
        if (event.user_id == user_id) {
            fwrite((char *)event.audio, 1, event.audio_size, fd);
        }
    });
 
    bot.on_ready([&bot](const dpp::ready_t & event) {
        if (dpp::run_once<struct register_bot_commands>()) {
            /* Create a new command. */
            dpp::slashcommand recordcommand("record", "Joins your voice channel and records you.", bot.me.id);
            dpp::slashcommand stopcommand("stop", "Stops recording you.", bot.me.id);
 
            bot.global_bulk_command_create({ recordcommand, stopcommand });
        }
    });
 
    /* Start bot */
    bot.start(dpp::st_wait);
 
    return 0;
}