workhorse.cpp

#include <unistd.h>
#include <iostream>
#include <sstream>
#include <vector>
#include <cstdlib>

#include <lvtk/plugin.hpp>

/* This is a ttl2c generated header */
#include "workhorse.h"

using namespace lvtk;
using std::vector;




class Workhorse;
typedef lvtk::Plugin<Workhorse, URID<true>, Options<false>, BufSize<false>,
                                Log<false>, Worker<true> >  PluginType;

class Workhorse : public PluginType
{
public:

    Workhorse (double rate)
        : PluginType (p_n_ports),
          m_sleeping (false),
          log_Entry (map (LV2_LOG__Entry)),
          log_Trace (map (LV2_LOG__Trace)),
          bufsize (0)
    { }

    void
    activate()
    {
        // query for buffer information.
        const BufferInfo& info (get_buffer_info());
        std::stringstream ss;
        ss << "Workhorse Buffer Information:\n";
        ss << "\tBuffer Bounded:  " << info.bounded << std::endl
           << "\tBuffer Fixed:    " << info.fixed << std::endl
           << "\tBuffer Pow of 2: " << info.power_of_two << std::endl
           << "\tBuffer Min:      " << info.min << std::endl
           << "\tBuffer Max:      " << info.max << std::endl
           << "\tSequence Size:   " << info.sequence_size << std::endl;
        printf (log_Entry, ss.str().c_str());
    }

    void
    run(uint32_t nframes)
    {
        static const char* msg = "go to sleep";

        if (! m_sleeping)
        {
            WorkerStatus status (schedule_work (strlen(msg) + 1, (void*)msg));

            switch (status)
            {
            case WORKER_SUCCESS:
                printf (log_Trace, "[workhorse] scheduled a job\n");
                m_sleeping = true;
                break;
            default:
                printf (log_Trace, "[workhorse] unknown scheduling error\n");
                break;
            }
        }
    }

    /* ============================= Worker ============================ */

    WorkerStatus
    work_response (uint32_t size, const void* body)
    {
        printf (log_Trace, "[workhorse] woke up. message: %s\n", (char*)body);
        m_sleeping = false;
        return WORKER_SUCCESS;
    }

    WorkerStatus
    work (WorkerRespond &respond, uint32_t  size, const void*  data)
    {
        printf (log_Entry, "[workhorse] taking a nap now\n");
        sleep (10);

        respond (size, data);
        return WORKER_SUCCESS;
    }

    uint32_t
    get_options (Option*)
    {
        // Don't have a host for this yet
        return OPTIONS_SUCCESS;
    }

    uint32_t
    set_options (const Option*)
    {
        // Don't have a host for this yet
        return OPTIONS_SUCCESS;
    }

private:

    bool m_sleeping;

    LV2_URID log_Entry;
    LV2_URID log_Trace;

    uint32_t bufsize;

};

static int _ = Workhorse::register_class (p_uri);