/*
 * Copyright (c) 2006-2007 NVIDIA, Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */


/*
 * nv-control-framelock.c - NV-CONTROL client that demonstrates how to
 * interact with the frame lock capabilities on an X Server.
 */


#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <X11/Xlib.h>

#include "NVCtrl.h"
#include "NVCtrlLib.h"


/*
 * do_help()
 *
 * Prints some help on how to use this app.
 *
 */
static void do_help(void)
{
    printf("usage:\n");
    printf("-q: query system frame lock information.\n");
    printf("-e: enable frame lock on system.\n");
    printf("-d: disable frame lock on system.\n");
    printf("\n");

} /* do_help()*/



/*
 * do_query()
 *
 * Prints information for all frame lock (Quadro Sync) devices found on
 * the given X server.
 *
 */
static void do_query(Display *dpy)
{
    Bool ret;
    int num_framelocks;
    int framelock;

    int gpu, display;
    int *gpu_data, *display_data;
    char *gpu_name, *display_name;

    int len;
    int i, j;
    int enabled;

    int current_config;
    int display_enabled;

    const char *current_str;


    /* Query the number of frame lock devices on the server */

    ret = XNVCTRLQueryTargetCount(dpy, NV_CTRL_TARGET_TYPE_FRAMELOCK,
                                  &num_framelocks);
    if (!ret) {
        printf("Failed to query number of frame lock devices!\n");
        return;
    }
    printf("Found %d frame lock device(s) on server.\n", num_framelocks);
    if ( !num_framelocks ) {
        return;
    }

    /* Display information for all frame lock devices found */

    for (framelock = 0; framelock < num_framelocks; framelock++) {

        printf("\n");
        printf("- Frame Lock Board %d :\n", framelock);

        /* Query the GPUs connected to this frame lock device */

        ret = XNVCTRLQueryTargetBinaryData
            (dpy,
             NV_CTRL_TARGET_TYPE_FRAMELOCK,
             framelock, // target_id
             0, // display_mask
             NV_CTRL_BINARY_DATA_GPUS_USING_FRAMELOCK,
             (unsigned char **) &gpu_data,
             &len);
        if (!ret) {
            printf("  - Failed to query list of GPUs!\n");
            continue;
        }

        /* Display information for all GPUs connected to frame lock device */

        if ( !gpu_data[0] ) {
            printf("  - No GPUs found!\n");
        } else {
            printf("  - Found %d GPU(s).\n", gpu_data[0]);
        }

        for (i = 1; i <= gpu_data[0]; i++) {
            gpu = gpu_data[i];

            /* Query GPU product name */

            ret = XNVCTRLQueryTargetStringAttribute(dpy,
                                                    NV_CTRL_TARGET_TYPE_GPU,
                                                    gpu, // target_id
                                                    0, // display_mask
                                                    NV_CTRL_STRING_PRODUCT_NAME,
                                                    &gpu_name);
            if (!ret) {
                printf("  - Failed to query GPU %d product name.\n", gpu);
                continue;
            }
            printf("  - GPU %d (%s) :\n", gpu, gpu_name);
            XFree(gpu_name);

            /* Query GPU sync state */

            printf("    - Sync    : ");
            ret = XNVCTRLQueryTargetAttribute(dpy,
                                              NV_CTRL_TARGET_TYPE_GPU,
                                              gpu, // target_id
                                              0, // display_mask
                                              NV_CTRL_FRAMELOCK_SYNC,
                                              &enabled);
            if (!ret) {
                printf("Failed to query sync state.\n");
            } else {
                printf("%sabled\n", enabled ? "En" : "Dis");
            }

            /* Query GPU displays */

            ret = XNVCTRLQueryTargetBinaryData
                (dpy,
                 NV_CTRL_TARGET_TYPE_GPU,
                 gpu,
                 0,
                 NV_CTRL_BINARY_DATA_DISPLAYS_CONNECTED_TO_GPU,
                 (unsigned char **) &display_data,
                 &len);

            if (!ret) {
                printf("    - Failed to query connected displays.\n");
                continue;
            }

            if (!display_data[0]) {
                printf("    - No Connected Displays found.\n");
            }

            for (j = 1; j <= display_data[0]; j++) {

                display = display_data[j];

                /* Query if this display is enabled. Silently skip if not */

                ret = XNVCTRLQueryTargetAttribute
                    (dpy,
                     NV_CTRL_TARGET_TYPE_DISPLAY,
                     display,
                     0,
                     NV_CTRL_DISPLAY_ENABLED,
                     &display_enabled);

                if (!ret) {
                    printf("    - Failed to query enabled displays.\n");
                    continue;
                }

                if (!display_enabled) {
                    continue;
                }

                /* Query current framelock config for this display */

                ret = XNVCTRLQueryTargetAttribute
                    (dpy,
                     NV_CTRL_TARGET_TYPE_DISPLAY,
                     display,
                     0,
                     NV_CTRL_FRAMELOCK_DISPLAY_CONFIG,
                     &current_config);

                if (!ret) {
                    current_config = -1;
                }

                if (current_config == NV_CTRL_FRAMELOCK_DISPLAY_CONFIG_SERVER) {
                    current_str = " - Server";
                } else if (current_config ==
                               NV_CTRL_FRAMELOCK_DISPLAY_CONFIG_CLIENT) {
                    current_str = " - Client";
                } else if (current_config ==
                               NV_CTRL_FRAMELOCK_DISPLAY_CONFIG_DISABLED) {
                    current_str = " - Disabled";
                } else {
                    current_str = " - Unknown";
                }

                /* Query Display name */

                ret = XNVCTRLQueryTargetStringAttribute
                    (dpy,
                     NV_CTRL_TARGET_TYPE_DISPLAY,
                     display,
                     0,
                     NV_CTRL_STRING_DISPLAY_NAME_RANDR,
                     &display_name);

                if (ret && display_name) {
                    printf("    - Display : %s%s\n", display_name, current_str);
                    XFree(display_name);
                } else {
                    printf("    - Display : 0x%08x%s\n", display, current_str);
                }

            }

            XFree(display_data);

        } /* Done disabling GPUs */

        XFree(gpu_data);

    } /* Done disabling Frame Lock Devices */

} /* do_query() */



/*
 * do_enable()
 *
 * Enables frame lock on the X Server by setting the first capable/available
 * display device as the frame lock server and setting all other display
 * devices as clients.
 *
 * NOTE: It is up to the user to ensure that each display device is set with
 *       the same refresh rate (mode timings).
 *
 */
static void do_enable(Display *dpy)
{
    Bool ret;
    int num_framelocks;
    int framelock;

    int gpu, display;
    int *gpu_data, *display_data;
    char *display_name;

    int len;
    int i, j;

    int enabled;
    int serverable;
    int pick_server = 1;
    int server_set = 0;

    NVCTRLAttributeValidValuesRec values;

    /* Query the number of frame lock devices to enable */

    ret = XNVCTRLQueryTargetCount(dpy, NV_CTRL_TARGET_TYPE_FRAMELOCK,
                                  &num_framelocks);
    if (!ret) {
        printf("Failed to query number of frame lock devices!\n");
        return;
    }
    printf("Found %d frame lock device(s) on server.\n", num_framelocks);
    if ( !num_framelocks ) {
        return;
    }

    /* Enable frame lock on all GPUs connected to each frame lock device */

    for (framelock = 0; framelock < num_framelocks; framelock++) {

        printf("\n");
        printf("- Frame Lock Board %d :\n", framelock);

        /* Query the GPUs connected to this frame lock device */

        ret = XNVCTRLQueryTargetBinaryData
            (dpy,
             NV_CTRL_TARGET_TYPE_FRAMELOCK,
             framelock, // target_id
             0, // display_mask
             NV_CTRL_BINARY_DATA_GPUS_USING_FRAMELOCK,
             (unsigned char **) &gpu_data,
             &len);
        if (!ret) {
            printf("  - Failed to query list of GPUs!\n");
            continue;
        }

        /* Enable frame lock on all GPUs connected to the frame lock device */

        if ( !gpu_data[0] ) {
            printf("  - No GPUs found!\n");
        } else {
            printf("  - Found %d GPU(s).\n", gpu_data[0]);
        }

        for (i = 1; i <= gpu_data[0]; i++) {
            gpu = gpu_data[i];

            printf("  - Enabling Quadro Sync Device %d - GPU %d...\n",
                   framelock, gpu);

            /* Make sure frame lock is disabled */

            ret = XNVCTRLQueryTargetAttribute(dpy,
                                              NV_CTRL_TARGET_TYPE_GPU,
                                              gpu, // target_id
                                              0, // display_mask
                                              NV_CTRL_FRAMELOCK_SYNC,
                                              &enabled);
            if (!ret) {
                printf("    - Failed to query Frame lock state.\n");
                continue;
            }
            if (enabled != NV_CTRL_FRAMELOCK_SYNC_DISABLE) {
                printf("    - Frame lock already enabled!\n");
                continue;
            }

            /* Get the list of displays to enable */

            ret = XNVCTRLQueryTargetBinaryData
                (dpy,
                 NV_CTRL_TARGET_TYPE_GPU,
                 gpu,
                 0,
                 NV_CTRL_BINARY_DATA_DISPLAYS_CONNECTED_TO_GPU,
                 (unsigned char **) &display_data,
                 &len);

            if (!ret) {
                printf("    - Failed to query enabled displays.\n");
                continue;
            }

            if (!display_data[0]) {
                printf("    - No Connected Displays found!\n");
            }

            for (j = 1; j <= display_data[0]; j++) {

                display = display_data[j];

                /* Query if display is enabled. Silently continue if not */

                ret = XNVCTRLQueryTargetAttribute
                    (dpy,
                     NV_CTRL_TARGET_TYPE_DISPLAY,
                     display,
                     0,
                     NV_CTRL_DISPLAY_ENABLED,
                     &enabled);

                if (!ret) {
                    printf("    - Failed to query enabled displays.\n");
                    continue;
                }

                if (!enabled) {
                    continue;
                }

                /* Query possible framelock configs for this display */

                ret = XNVCTRLQueryValidTargetAttributeValues
                    (dpy,
                     NV_CTRL_TARGET_TYPE_DISPLAY,
                     display,
                     0,
                     NV_CTRL_FRAMELOCK_DISPLAY_CONFIG,
                     &values);

                if (!ret) {
                    continue;
                }

                serverable = (values.u.bits.ints &
                    (1 << NV_CTRL_FRAMELOCK_DISPLAY_CONFIG_SERVER));

                /* Query Display name */

                ret = XNVCTRLQueryTargetStringAttribute
                    (dpy,
                     NV_CTRL_TARGET_TYPE_DISPLAY,
                     display,
                     0,
                     NV_CTRL_STRING_DISPLAY_NAME_RANDR,
                     &display_name);

                if (ret && display_name) {
                    printf("    - Display %s", display_name);
                    XFree(display_name);
                } else {
                    printf("    - Display 0x%08x", display);
                }

                /* Pick the first capable display device as the server */

                if (pick_server && serverable) {

                    /* Make sure we're not using the House Sync signal. */

                    XNVCTRLSetTargetAttribute(dpy,
                                              NV_CTRL_TARGET_TYPE_FRAMELOCK,
                                              framelock, // target_id
                                              0, // display_mask
                                              NV_CTRL_USE_HOUSE_SYNC,
                                              NV_CTRL_USE_HOUSE_SYNC_FALSE);

                    XNVCTRLSetTargetAttribute
                        (dpy,
                         NV_CTRL_TARGET_TYPE_DISPLAY,
                         display,
                         0,
                         NV_CTRL_FRAMELOCK_DISPLAY_CONFIG,
                         NV_CTRL_FRAMELOCK_DISPLAY_CONFIG_SERVER);

                    server_set = 1;
                    pick_server = 0;

                    printf(" - Set as Server\n");

                } else {

                    XNVCTRLSetTargetAttribute
                        (dpy,
                         NV_CTRL_TARGET_TYPE_DISPLAY,
                         display,
                         0,
                         NV_CTRL_FRAMELOCK_DISPLAY_CONFIG,
                         NV_CTRL_FRAMELOCK_DISPLAY_CONFIG_CLIENT);

                    printf(" - Set as Client\n");

                }
            }

            XFree(display_data);

            /* Enable frame lock */

            XNVCTRLSetTargetAttribute(dpy,
                                      NV_CTRL_TARGET_TYPE_GPU,
                                      gpu, // target_id
                                      0, // display_mask
                                      NV_CTRL_FRAMELOCK_SYNC,
                                      NV_CTRL_FRAMELOCK_SYNC_ENABLE);
            XFlush(dpy);
            printf("    - Frame Lock Sync Enabled.\n");

            /* If we just enabled the server, also toggle the test signal
             * to guarantee accuracy of the universal frame count (as
             * returned by the glXQueryFrameCountNV() function in the
             * GLX_NV_swap_group extension).
             */
            if (server_set) {
                XNVCTRLSetTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GPU,
                                          gpu, // target_id
                                          0, // display_mask
                                          NV_CTRL_FRAMELOCK_TEST_SIGNAL,
                                          NV_CTRL_FRAMELOCK_TEST_SIGNAL_ENABLE);

                XNVCTRLSetTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GPU,
                                          gpu, // target_id
                                          0, // display_mask
                                          NV_CTRL_FRAMELOCK_TEST_SIGNAL,
                                          NV_CTRL_FRAMELOCK_TEST_SIGNAL_DISABLE);

                printf("    - Frame Lock Test Signal Toggled.\n");
                server_set = 0;
            }

        } /* Done enabling GPUs */

        XFree(gpu_data);

    } /* Done enabling framelocks */
}



static void do_disable(Display *dpy)
{
    Bool ret;
    int num_framelocks;
    int framelock;
    int gpu;

    int *data;
    int len;
    int i;

    /* Query the number of frame lock devices to disable */

    ret = XNVCTRLQueryTargetCount(dpy, NV_CTRL_TARGET_TYPE_FRAMELOCK,
                                  &num_framelocks);
    if (!ret) {
        printf("Failed to query number of frame lock devices!\n");
        return;
    }
    printf("Found %d frame lock device(s) on server.\n", num_framelocks);
    if ( !num_framelocks ) {
        return;
    }

    /* Disable frame lock on all GPUs connected to each frame lock device */

    for (framelock = 0; framelock < num_framelocks; framelock++) {

        printf("\n");
        printf("- Frame Lock Board %d :\n", framelock);

        /* Query the GPUs connected to this frame lock device */

        ret = XNVCTRLQueryTargetBinaryData
            (dpy,
             NV_CTRL_TARGET_TYPE_FRAMELOCK,
             framelock, // target_id
             0, // display_mask
             NV_CTRL_BINARY_DATA_GPUS_USING_FRAMELOCK,
             (unsigned char **) &data,
             &len);
        if (!ret) {
            printf("  - Failed to query list of GPUs!\n");
            continue;
        }

        /* Disable frame lock on all GPUs connected to the frame lock device */

        if ( !data[0] ) {
            printf("  - No GPUs found!\n");
        } else {
            printf("  - Found %d GPU(s).\n", data[0]);
        }

        for (i = 1; i <= data[0]; i++) {
            gpu = data[i];

            printf("  - Disabling Quadro Sync Device %d - GPU %d... ",
                   framelock, gpu);

            XNVCTRLSetTargetAttribute(dpy,
                                      NV_CTRL_TARGET_TYPE_GPU,
                                      gpu, // target_id
                                      0, // display_mask
                                      NV_CTRL_FRAMELOCK_SYNC,
                                      NV_CTRL_FRAMELOCK_SYNC_DISABLE);
            XFlush(dpy);
            printf("Done.\n");

        } /* Done disabling GPUs */

        XFree(data);

    } /* Done disabling Frame Lock Devices */

} /* do_disable() */



int main(int argc, char *argv[])
{
    Display *dpy;
    Bool ret;
    int major, minor;

    /*
     * Open a display connection, and make sure the NV-CONTROL X
     * extension is present on the screen we want to use.
     */

    dpy = XOpenDisplay(NULL);
    if (!dpy) {
        printf("Cannot open display '%s'.\n", XDisplayName(NULL));
        return 1;
    }

    /* Query the NV-CONTROL version */

    ret = XNVCTRLQueryVersion(dpy, &major, &minor);
    if (ret != True) {
        printf("The NV-CONTROL X extension does not exist on '%s'.\n",
                XDisplayName(NULL));
        return 1;
    }

    /* Print some information */

    printf("Using NV-CONTROL extension %d.%d on %s\n\n",
           major, minor, XDisplayName(NULL));

    if ((major < 1) || (major == 1 && minor < 9)) {
        printf("The NV-CONTROL X extension is too old.  Version 1.9 or above "
               " is required for configuring Frame Lock via target types.\n");
        return 1;
    }

    /* Do what the user wants */

    if (argc <= 1 || (strcmp(argv[1], "-q") == 0)) {
        do_query(dpy);

    } else if (strcmp(argv[1], "-e") == 0) {
        do_enable(dpy);

    } else if (strcmp(argv[1], "-d") == 0) {
        do_disable(dpy);

    } else {
        do_help();
    }

    return 0;
}