musix 0.3.3

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

#include "he/misc.h"

#include "../../chipplayer.h"

#include <psf/PSFFile.h>

#include <coreutils/utils.h>
#include <set>
#include <unordered_map>

namespace musix {

class HEPlayer : public ChipPlayer
{
public:
    explicit HEPlayer(const std::string& fileName)
    {

        std::array<char, 2048> temp;
        strcpy(temp.data(), fileName.c_str());

        int psf_version = psf_load(temp.data(), &psf_file_system, 0, nullptr,
                                   nullptr, nullptr, nullptr, 0);
        PSFFile psf{fileName};

        if (psf.valid()) {
            auto& tags = psf.tags();

            int seconds = psf.songLength();

            setMeta("composer", tags["artist"], "sub_title", tags["title"],
                    "game", tags["game"], "format",
                    psf_version == 1 ? "Playstation" : "Playstation2", "length",
                    seconds);
        }

        void* psx_state = malloc(psx_get_state_size(psf_version));
        psx_clear_state(psx_state, psf_version);

        psf1_load_state lstate{};

        lstate.emu = psx_state;
        lstate.first = true;
        lstate.refresh = 50;

        auto* psinfo =
            static_cast<psf1_load_state*>(malloc(sizeof(psf1_load_state)));

        if (psf_version == 1) {
            if (psf_load(temp.data(), &psf_file_system, psf_version, psf1_load,
                         &lstate, psf1_info, &lstate, 0) < 0) {
                throw player_exception();
            }
        }
        if (psf_version == 2) {
            void* psf2fs = psf2fs_create();
            if (psf2fs == nullptr) { throw player_exception(); }

            psf1_load_state lstate{};

            if (psf_load(temp.data(), &psf_file_system, psf_version,
                         psf2fs_load_callback, psf2fs, psf1_info, &lstate,
                         0) < 0) {
                throw player_exception();
            }

            psx_set_readfile(psx_state, virtual_readfile, psf2fs);

            psinfo->psf2fs = psf2fs;
        }
        psinfo->emu = psx_state;
        psinfo->version = psf_version;
        psinfo->first = lstate.first;
        psinfo->refresh = lstate.refresh;

        state = psinfo;
    }

    ~HEPlayer() override
    {
        if (state->version == 2) { psf2fs_delete(state->psf2fs); }
        free(state->emu);
        free(state);
    }

    int getSamples(int16_t* target, int noSamples) override
    {

        void* psx_state = state->emu;
        uint32_t samples_cnt = noSamples / 2;

        /* int rtn = */ psx_execute(psx_state, 0x7FFFFFFF, target, &samples_cnt,
                                    0);
        if (static_cast<int>(samples_cnt) < (noSamples / 2)) {
            noSamples = samples_cnt * 2;
        }

        return noSamples;
    }

private:
    psf1_load_state* state;
};

static const std::set<std::string> supported_ext{"psf", "psf2", "minipsf",
                                                 "minipsf2"};

bool HEPlugin::canHandle(const std::string& name)
{
    auto ext = utils::path_extension(name);

    if (utils::toLower(name).find("/soundfactory") != std::string::npos) {
        return false;
    }

    return supported_ext.count(utils::path_extension(name)) > 0;
}

ChipPlayer* HEPlugin::fromFile(const std::string& fileName)
{
    if (!biosLoaded) {
        LOGD("Now loading '%s'", biosFileName);
        FILE* f = fopen(biosFileName.c_str(), "rb");
        if (f == nullptr) { return nullptr; }

        fseek(f, 0, SEEK_END);
        auto bios_size = static_cast<int>(ftell(f));
        fseek(f, 0, SEEK_SET);

        auto* bios = static_cast<uint8_t*>(malloc(bios_size));
        auto rc = fread(bios, 1, bios_size, f);
        fclose(f);
        if (rc != bios_size) { return nullptr; }
        LOGD("Successfully loaded hebios.bin");
        bios_set_image(static_cast<uint8*>(bios), bios_size);

        int init_result = psx_init();
        if (init_result != 0) {
            return nullptr; // means init failed
        }

        biosLoaded = true;
    }
    return new HEPlayer{fileName};
};

extern "C" void heplugin_register()
{
    musix::ChipPlugin::addPluginConstructor([](std::string const& config) {
        return std::make_shared<musix::HEPlugin>(config + "/hebios.bin");
    });
}
} // namespace musix