usbdmx.c

/*
Copyright (c) 2011, Frank Sievertsen
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of FX5 nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/

#include "usbdmx.h"
#include "hidapi.h"
#include <stdio.h>
#include <sys/types.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <signal.h>

#define MAX_OPENED 32

#define THREAD_STATUS_RUN 0
#define THREAD_STATUS_STOP 1
#define THREAD_STATUS_STOPPED 2
#define THREAD_STATUS_PAUSE 3
#define THREAD_STATUS_PAUSED 4

typedef struct  {
    TSERIAL serial;
    hid_device * handle;
    pthread_t thread;
    TDMXArray * dmx_in;
    TDMXArray * dmx_out;
    TDMXArray dmx_cmp;
    volatile sig_atomic_t status;
    volatile sig_atomic_t mode;
    volatile unsigned char old_mode;
} device_t;


#define DMX_INTERFACE_VENDOR_ID 0x4B4
#define DMX_INTERFACE_PRODUCT_ID 0xF1F
#define DMX_INTERFACE_VENDOR_ID_2 0x16C0
#define DMX_INTERFACE_PRODUCT_ID_2 0x88B


void wserial_to_serial(const wchar_t * s1, char * s2) {
    int i;
    for(i=0;i<16;i++) {
        s2[i] = s1[i];
    }
}
void wserial_from_serial(wchar_t * s1, const char * s2) {
    int i;
    for(i=0;i<16;i++) {
        s1[i] = s2[i];
    }
    s1[i] = 0;
}

void set_mode(hid_device * handle, unsigned char mode) {
    unsigned char buffer[34];

    memset(buffer, 0, 34);
    buffer[1]=16;
    buffer[2]=mode;
    hid_write(handle, buffer, 34);
}

THOSTDEVICECHANGEPROC * callback_func;
THOSTINPUTCHANGEPROCBLOCK * callback_func_block;

char NO_DEV[] = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";

device_t open_devices[MAX_OPENED];

int find_dev(TSERIAL serial) {
    int i;
    for(i=0; i<MAX_OPENED; i++) {
        if(memcmp(serial, open_devices[i].serial, 16) == 0) {
            return i;
        }
    }
    return -1;
}
void set_dev(int pos, char * serial) {
    memcpy(open_devices[pos].serial, serial, 16);
}

USB_DMX_DLL void GetAllConnectedInterfaces(TSERIALLIST* SerialList) {
    struct hid_device_info *devs, *cur_dev;
    int pos = 0;

    memset(SerialList, '0', sizeof(TSERIALLIST));
    devs = hid_enumerate(0x0, 0x0);
    cur_dev = devs;

    while (cur_dev) {
        if(
            ((cur_dev->vendor_id == DMX_INTERFACE_VENDOR_ID)&&(cur_dev->product_id == DMX_INTERFACE_PRODUCT_ID)) ||
            ((cur_dev->vendor_id == DMX_INTERFACE_VENDOR_ID_2)&&(cur_dev->product_id == DMX_INTERFACE_PRODUCT_ID_2))
        ) {
            wserial_to_serial(cur_dev->serial_number, SerialList[0][pos]);
            pos ++;
        }
        cur_dev = cur_dev->next;
    }
    hid_free_enumeration(devs);
}

USB_DMX_DLL DWORD GetDeviceVersion(TSERIAL Serial) {
    struct hid_device_info *devs, *cur_dev;
    DWORD res = 0x100;

    char serial_test[17];

    devs = hid_enumerate(0x0, 0x0);

    cur_dev = devs;

    while (cur_dev) {
        if(
            ((cur_dev->vendor_id == DMX_INTERFACE_VENDOR_ID)&&(cur_dev->product_id == DMX_INTERFACE_PRODUCT_ID)) ||
            ((cur_dev->vendor_id == DMX_INTERFACE_VENDOR_ID_2)&&(cur_dev->product_id == DMX_INTERFACE_PRODUCT_ID_2))
        ) {
            wserial_to_serial(cur_dev->serial_number, serial_test);
            if(memcmp(Serial,serial_test,16)==0) {
                res = cur_dev->release_number;
            }
        }
        cur_dev = cur_dev->next;
    }

    hid_free_enumeration(devs);

    return res;
}

USB_DMX_DLL void GetAllOpenedInterfaces(TSERIALLIST* SerialList) {
    int pos;
    int i;
    pos = 0;
    memset(SerialList, '0', sizeof(TSERIALLIST));
    for(i=0; i<MAX_OPENED; i++) {
        if(memcmp(open_devices[i].serial,NO_DEV,16)!=0) {
            memcpy(SerialList[0][pos], open_devices[i].serial, 16);
            pos ++;
        }
    }
    wserial_to_serial(L"0000000000000000", SerialList[0][pos]);
}

USB_DMX_DLL DWORD SetInterfaceMode (TSERIAL Serial, unsigned char Mode) {
    int pos;

    pos = find_dev(Serial);
    if (pos == -1) {
        return 0;
    }
    open_devices[pos].mode = Mode;
    while(open_devices[pos].mode != open_devices[pos].old_mode) {
        usleep(10000);
    }
    return 1;
}


void *read_write_thread(void *pointer)
{
    device_t * device = (device_t *) pointer;
    unsigned char buffer[35];
    int size;
    int i;
    int res;
    int changed;
    int first_time = 1;
    THOSTDEVICECHANGEPROC * tmp;
    THOSTINPUTCHANGEPROCBLOCK * tmp2;

    while(device->status != THREAD_STATUS_STOP) {
        if (device->status == THREAD_STATUS_PAUSE) {
            device->status = THREAD_STATUS_PAUSED;
            while(device->status == THREAD_STATUS_PAUSED) {
                usleep(10000);
            }
        }
        if(device->old_mode != device->mode) {
            device->old_mode = device->mode;
            set_mode(device->handle, device->old_mode);
        }
        if(device->dmx_out) {
            for(i=0; i<16; i++) {
                if(first_time || (memcmp(device->dmx_cmp + (i * 32), (* device->dmx_out) + (i * 32), 32) != 0)) {
                    memcpy(device->dmx_cmp + (i * 32), (* device->dmx_out) + (i * 32), 32);
                    memcpy(buffer + 2, device->dmx_cmp + (i * 32), 32);
                    buffer[0] = 0;
                    buffer[1] = i;
                    res = hid_write(device->handle, buffer, 34);
                    (void)res;
                }
            }
        }
        if(device->dmx_in) {
            changed = 0;
            while(1) {
                size = hid_read(device->handle, buffer, 33);
                if(size == 0) {
                    break;
                }
                if(size < 0) {
                    break;
                }
                if(size == 33) {
                    memcpy(device->dmx_in[0]+buffer[0]*32, buffer+1, 32);
                    changed = 1;
                    tmp2 = callback_func_block;
                    if(tmp2) {
                        (*tmp2)(buffer[0]);
                    }
                }
            }
            tmp = callback_func;
            if(changed && tmp) {
                (*tmp)();
            }
        }
        first_time = 0;
        usleep(10000);
    }
    device->status = THREAD_STATUS_STOPPED;

    return NULL;
}

USB_DMX_DLL DWORD OpenLink(TSERIAL Serial, TDMXArray *DMXOutArray, TDMXArray *DMXInArray) {
    hid_device *handle;
    int pos;

    wchar_t wserial[17];
    wserial_from_serial(wserial, Serial);

    pos = find_dev(Serial);
    if(pos != -1) {
        return 1;
    }

    pos = find_dev(NO_DEV);
    if(pos == -1) {
        return 0;
    }
    handle = hid_open(DMX_INTERFACE_VENDOR_ID, DMX_INTERFACE_PRODUCT_ID, wserial);
    if(!handle) {
        handle = hid_open(DMX_INTERFACE_VENDOR_ID_2, DMX_INTERFACE_PRODUCT_ID_2, wserial);
    }
    if (!handle) {
        return 0;
    }
    hid_set_nonblocking(handle, 1);

    memset(&open_devices[pos], 0, sizeof(device_t));
    set_dev(pos, Serial);
    open_devices[pos].handle = handle;
    open_devices[pos].dmx_out = DMXOutArray;
    open_devices[pos].dmx_in = DMXInArray;

    set_mode(handle, 0);

    pthread_create(&open_devices[pos].thread, NULL, read_write_thread, &open_devices[pos]);
    return 1;
}

USB_DMX_DLL DWORD CloseLink (TSERIAL Serial) {
    int pos;

    pos = find_dev(Serial);
    if(pos == -1) {
        return 0;
    }
    open_devices[pos].status = THREAD_STATUS_STOP;
    while(open_devices[pos].status != THREAD_STATUS_STOPPED) {
        usleep(10000);
    }
    hid_close(open_devices[pos].handle);
    set_dev(pos, NO_DEV);
    return 1;
}

USB_DMX_DLL DWORD CloseAllLinks (void) {
    int i;
    int result = 1;
    for(i=0; i<MAX_OPENED; i++) {
        if(memcmp(open_devices[i].serial, NO_DEV, 16) != 0) {
            if(0 == CloseLink(open_devices[i].serial)) {
                result = 0;
            }
        }
    }
    return result;
}

USB_DMX_DLL DWORD RegisterInterfaceChangeNotification (THOSTDEVICECHANGEPROC Proc) {
    // FIXME
    return 1;
}

USB_DMX_DLL DWORD UnregisterInterfaceChangeNotification (void) {
    // FIXME too
    return 1;
}

USB_DMX_DLL DWORD RegisterInputChangeNotification (THOSTDEVICECHANGEPROC Proc) {
    callback_func = Proc;
    return 1;
}

USB_DMX_DLL DWORD UnregisterInputChangeNotification (void) {
    callback_func = NULL;
    return 1;
}

USB_DMX_DLL DWORD SetInterfaceAdvTxConfig(
    TSERIAL Serial, unsigned char Control, uint16_t Breaktime, uint16_t Marktime,
    uint16_t Interbytetime, uint16_t Interframetime, uint16_t Channelcount, uint16_t Startbyte
) {
    int pos;
    unsigned char buffer[35];

    pos = find_dev(Serial);
    if (pos == -1) {
        return 0;
    }

    if (Channelcount > 512) Channelcount = 512;

    open_devices[pos].status = THREAD_STATUS_PAUSE;

    while (open_devices[pos].status != THREAD_STATUS_PAUSED) {
        usleep(10000);
    }

    memset(buffer, 0, 34);
    buffer[0] = 0;
    buffer[1] = 17;
    buffer[2] = Control;
    buffer[3] = Breaktime & 255;
    buffer[4] = (Breaktime >> 8) & 255;
    buffer[5] = Marktime & 255;
    buffer[6] = (Marktime >> 8) & 255;
    buffer[7] = Interbytetime & 255;
    buffer[8] = (Interbytetime >> 8) & 255;
    buffer[9] = Interframetime & 255;
    buffer[10] = (Interframetime >> 8) & 255;
    buffer[11] = Channelcount & 255;
    buffer[12] = (Channelcount >> 8) & 255;
    buffer[13] = Startbyte;

    hid_write(open_devices[pos].handle, buffer, 34);

    open_devices[pos].status = THREAD_STATUS_RUN;

    return 1;
}
USB_DMX_DLL DWORD StoreInterfaceAdvTxConfig(TSERIAL Serial) {
    int pos;
    unsigned char buffer[35];

    pos = find_dev(Serial);
    if (pos == -1) {
        return 0;
    }

    open_devices[pos].status = THREAD_STATUS_PAUSE;

    while (open_devices[pos].status != THREAD_STATUS_PAUSED) {
        usleep(10000);
    }

    memset(buffer, 0, 34);
    buffer[0] = 0;
    buffer[1] = 18;
    buffer[2] = 1;

    hid_write(open_devices[pos].handle, buffer, 34);

    open_devices[pos].status = THREAD_STATUS_RUN;

    return 1;
}
USB_DMX_DLL DWORD RegisterInputChangeBlockNotification(THOSTINPUTCHANGEPROCBLOCK Proc) {
    callback_func_block = Proc;
    return 1;
}
USB_DMX_DLL DWORD UnregisterInputChangeBlockNotification(void) {
    callback_func_block = NULL;
    return 1;
}

/// And the Functions from usbdmxsi.USB_DMX_DLL also

USB_DMX_DLL DWORD OpenInterface(TDMXArray *DMXOutArray, TDMXArray *DMXInArray, unsigned char Mode) {
    TSERIALLIST InterfaceList;

    GetAllOpenedInterfaces(&InterfaceList);

    if(memcmp(InterfaceList[0],"0000000000000000",16) != 0) {
        return 1;
    }

    GetAllConnectedInterfaces(&InterfaceList);

    if(memcmp(InterfaceList[0],"0000000000000000",16) == 0) {
        return 0;
    }
    if(0 == OpenLink(InterfaceList[0], DMXOutArray, DMXInArray)) {
        return 0;
    }

    if(0 == SetInterfaceMode(InterfaceList[0], Mode)) {
        return 0;
    }
    return 1;
}

USB_DMX_DLL DWORD CloseInterface(void) {
    TSERIALLIST InterfaceList;

    GetAllOpenedInterfaces(&InterfaceList);

    if(memcmp(InterfaceList[0],"0000000000000000",16) == 0) {
        return 0;
    }

    if(0 == CloseLink(InterfaceList[0])) {
        return 0;
    }

    return 1;
}