musix 0.3.3

Music player library for esoteric audio formats (music from C64,Amiga etc)
Documentation 
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#include "GMEPlugin.h"
#include "../../chipplayer.h"

#include <coreutils/log.h>
#include <coreutils/ptr.h>
#include <coreutils/utils.h>

#include "gme/gme.h"

#include <set>

namespace musix {

class GMEPlayer : public ChipPlayer
{
public:
    explicit GMEPlayer(const std::string& fileName)
        : started(false), ended(false)
    {
        gme_err_t err =
            gme_open_file(fileName.c_str(), &utils::raw_ptr(emu), 44100);
        if (err != nullptr) {
            throw player_exception("Could not load GME music");
        }

        gme_info_t* track0 = nullptr;

        gme_track_info(emu.get(), &track0, 0);

        setMeta("game", track0->game, "composer", track0->author, "copyright",
                track0->copyright, "length",
                track0->length > 0 ? track0->length / 1000 : 0, "sub_title",
                track0->song, "format", track0->system, "songs",
                gme_track_count(emu.get()));
        gme_free_info(track0);
    }

    int getSamples(int16_t* target, int noSamples) override
    {
        gme_err_t err = nullptr;
        if (!started) {
            err = gme_start_track(emu.get(), 0);
            started = true;
        }

        if (!ended && (gme_track_ended(emu.get()) != 0)) {
            LOGD("## GME HAS ENDED");
            ended = true;
        }
        if (ended) {
            memset(target, 0, noSamples * 2);
            return noSamples;
        }

        err = gme_play(emu.get(), noSamples, target);

        return noSamples;
    }

    bool seekTo(int song, int seconds) override
    {
        if (song >= 0) {

            if (ended) {
                // err = gme_start_track(emu, 0);
                ended = false;
            }

            gme_info_t* track = nullptr;
            if (gme_track_info(emu.get(), &track, song) != nullptr) {
                return false;
            }
            setMeta("sub_title", track->song, "length",
                    track->length > 0 ? track->length / 1000 : 0, "song",
                    static_cast<uint32_t>(song));

            gme_start_track(emu.get(), song);
            started = true;
            gme_free_info(track);
        }
        if (seconds >= 0) { gme_seek(emu.get(), seconds); }
        return true;
    }

private:
    std::unique_ptr<Music_Emu, void (*)(Music_Emu*)> emu{nullptr, gme_delete};
    bool started;
    bool ended;
};

static const std::set<std::string> supported_ext = {
    "emul", "spc", "gym", "nsf", "nsfe", "gbs",
    "ay",   "sap", "vgm", "vgz", "hes",  "kss"};

bool GMEPlugin::canHandle(const std::string& name)
{
    return supported_ext.count(utils::path_extension(name)) > 0;
}

ChipPlayer* GMEPlugin::fromFile(const std::string& name)
{
    return new GMEPlayer{name};
};

} // namespace musix
//
extern "C" void gmeplugin_register()
{
    musix::ChipPlugin::addPluginConstructor([](std::string const& config) {
        return std::make_shared<musix::GMEPlugin>();
    });
}