/*
 * 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-gvi.c - NV-CONTROL client that demonstrates how to
 * interact with the GVI capabilities on an X Server.
 */


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

#include <X11/Xlib.h>

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


/* Used to stringify NV_CTRL_XXX #defines */

#define ADD_NVCTRL_CASE(FMT) \
case (FMT):                  \
    return #FMT;


/*
 * Decode provided signal format.
 */

static char *VideoFormatName(int value)
{
    switch(value) {
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_NONE);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_487I_59_94_SMPTE259_NTSC);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_576I_50_00_SMPTE259_PAL);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_720P_59_94_SMPTE296);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_720P_60_00_SMPTE296);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1035I_59_94_SMPTE260);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1035I_60_00_SMPTE260);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_50_00_SMPTE295);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_50_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_59_94_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_60_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_23_976_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_24_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_25_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_29_97_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_30_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_720P_50_00_SMPTE296);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_48_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_47_96_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_720P_30_00_SMPTE296);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_720P_29_97_SMPTE296);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_720P_25_00_SMPTE296);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_720P_24_00_SMPTE296);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_720P_23_98_SMPTE296);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080PSF_25_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080PSF_29_97_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080PSF_30_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080PSF_24_00_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080PSF_23_98_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_30_00_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_29_97_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_60_00_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_59_94_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_25_00_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_50_00_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_24_00_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_23_98_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_48_00_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_47_96_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_50_00_3G_LEVEL_A_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_59_94_3G_LEVEL_A_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_60_00_3G_LEVEL_A_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_60_00_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_60_00_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_60_00_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_50_00_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_50_00_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_50_00_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_30_00_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_30_00_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_25_00_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_25_00_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_24_00_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_24_00_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_48_00_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_48_00_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_59_94_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_59_94_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_59_94_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_29_97_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_29_97_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080P_23_98_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048P_23_98_3G_LEVEL_B_SMPTE372);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_1080I_47_96_3G_LEVEL_B_SMPTE274);
        ADD_NVCTRL_CASE(NV_CTRL_GVIO_VIDEO_FORMAT_2048I_47_96_3G_LEVEL_B_SMPTE372);
    default:
        return "Invalid Value";
    }
}

static const char *SamplingName(int value)
{
    switch (value) {
        ADD_NVCTRL_CASE(NV_CTRL_GVI_COMPONENT_SAMPLING_UNKNOWN);
        ADD_NVCTRL_CASE(NV_CTRL_GVI_COMPONENT_SAMPLING_4444);
        ADD_NVCTRL_CASE(NV_CTRL_GVI_COMPONENT_SAMPLING_4224);
        ADD_NVCTRL_CASE(NV_CTRL_GVI_COMPONENT_SAMPLING_444);
        ADD_NVCTRL_CASE(NV_CTRL_GVI_COMPONENT_SAMPLING_422);
        ADD_NVCTRL_CASE(NV_CTRL_GVI_COMPONENT_SAMPLING_420);
    default:
        return "Invalid Value";
    }
}

static const char *BPCName(int value)
{
    switch (value) {
        ADD_NVCTRL_CASE(NV_CTRL_GVI_BITS_PER_COMPONENT_UNKNOWN);
        ADD_NVCTRL_CASE(NV_CTRL_GVI_BITS_PER_COMPONENT_8);
        ADD_NVCTRL_CASE(NV_CTRL_GVI_BITS_PER_COMPONENT_10);
        ADD_NVCTRL_CASE(NV_CTRL_GVI_BITS_PER_COMPONENT_12);
    default:
        return "Invalid Value";
    }
}



/*
 * do_help()
 *
 * Prints some help on how to use this app.
 *
 */
static void do_help(void)
{
    printf("usage:\n");
    printf("-q: query system GVI information.\n");
    printf("-c <TOPOLOGY>: configure default GVI system topology.\n");
    printf("-g #: Operate on specific GVI device.\n");
    printf("-l: List GVI configuration space.\n");
    printf("\n");

} /* do_help()*/



/*
 * do_query()
 *
 * Prints information for all GVI devices found on
 * the given X server.
 *
 */
static void do_query(Display *dpy, int use_gvi)
{
    Bool ret;
    int num_gvi;
    int gvi;
    int last_gvi;

    int value;
    int num_jacks;
    int jack;
    int max_channels_per_jack;
    int channel;

    char *pOut;


    /* Query the number of GVI devices on the server */

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

    if (use_gvi >= 0 && use_gvi < num_gvi) {
        /* Only display information about 1 GVI device/ */
        printf("Querying GVI device %d...\n", use_gvi);
        gvi = use_gvi;
        last_gvi = use_gvi;
    } else {
        /* Display all GVI devices */
        printf("Querying all GVI devices...\n");
        gvi = 0;
        last_gvi = num_gvi-1;
    }

    /* Display information about the GVI(s) */

    for (; gvi <= last_gvi; gvi++) {
        
        printf("\n");
        printf("- GVI Board %d :\n", gvi);

        ret = XNVCTRLQueryTargetStringAttribute(dpy,
                                                NV_CTRL_TARGET_TYPE_GVI,
                                                gvi, // target_id
                                                0, // display_mask
                                                NV_CTRL_STRING_GVIO_FIRMWARE_VERSION,
                                                &pOut);
        if (!ret) {
            printf("  - Failed to query firmware version of GVI %d.\n", gvi);
            continue;
        } 
        printf("  - Firmware Version: %s\n", pOut);
        XFree(pOut);
        pOut = NULL;

        ret = XNVCTRLQueryTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GVI,
                                          gvi, // target_id
                                          0, // display_mask
                                          NV_CTRL_GVI_GLOBAL_IDENTIFIER,
                                          &value);
        if (!ret) {
            printf("  - Failed to query global ID of GVI %d.\n", gvi);
            continue;
        } 
        printf("  - Global ID: %d\n", value);

        ret = XNVCTRLQueryTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GVI,
                                          gvi, // target_id
                                          0, // display_mask
                                          NV_CTRL_GVI_NUM_CAPTURE_SURFACES,
                                          &value);
        if (!ret) {
            printf("  - Failed to number of capture surfaces of GVI %d.\n", gvi);
            continue;
        } 
        printf("  - Number of capture surfaces: %d\n", value);

        ret = XNVCTRLQueryTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GVI,
                                          gvi, // target_id
                                          0, // display_mask
                                          NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT,
                                          &value);
        if (!ret) {
            printf("  - Failed to query requested video format on "
                   "GVI %d.\n", gvi);
            continue;
        } 
        printf("  - Requested video format: %d (%s)\n", value,
               VideoFormatName(value));

        ret = XNVCTRLQueryTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GVI,
                                          gvi, // target_id
                                          0, // display_mask
                                          NV_CTRL_GVI_MAX_STREAMS,
                                          &value);
        if (!ret) {
            printf("  - Failed to query max number of streams on "
                   "GVI %d.\n", gvi);
            continue;
        } 
        printf("  - Max number of configurable streams: %d\n", value);

        ret = XNVCTRLQueryTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GVI,
                                          gvi, // target_id
                                          0, // display_mask
                                          NV_CTRL_GVI_MAX_LINKS_PER_STREAM,
                                          &value);
        if (!ret) {
            printf("  - Failed to query max number of links per stream on "
                   "GVI %d.\n", gvi);
            continue;
        } 
        printf("  - Max number of links per stream: %d\n", value);

        ret = XNVCTRLQueryTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GVI,
                                          gvi, // target_id
                                          0, // display_mask
                                          NV_CTRL_GVI_NUM_JACKS,
                                          &num_jacks);
        if (!ret) {
            printf("  - Failed to query number of input jacks on GVI "
                   "%d.\n", gvi);
            continue;
        } 
        printf("  - Number of input jacks on device: %d\n", num_jacks);

        ret = XNVCTRLQueryTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GVI,
                                          gvi, // target_id
                                          0, // display_mask
                                          NV_CTRL_GVI_MAX_CHANNELS_PER_JACK,
                                          &max_channels_per_jack);
        if (!ret) {
            printf("  - Failed to query maximum number of channels per "
                   "jack on GVI %d.\n", gvi);
            continue;
        } 
        printf("  - Maximum number of channels per jack on device: %d\n",
               max_channels_per_jack);

        /* Display per-jack/channel information */

        for (jack = 0; jack < num_jacks; jack++) {
            printf("    - Jack %d\n", jack);

            for (channel = 0; channel < max_channels_per_jack; channel++) {
                unsigned int link_definition = ((channel & 0xFFFF)<<16);

                printf("      - Channel %d\n", channel);

                link_definition |= (jack & 0xFFFF);

                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  link_definition, // display_mask
                                                  NV_CTRL_GVIO_DETECTED_VIDEO_FORMAT,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query detected video format "
                           "on jack %d, channel %d of GVI %d.\n",
                           jack, channel, gvi);
                    continue;
                } 
                printf("        - Detected Video Format: %d (%s)\n", value,
                       VideoFormatName(value)
                       );
            
                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  link_definition, // display_mask
                                                  NV_CTRL_GVI_DETECTED_CHANNEL_SMPTE352_IDENTIFIER,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query detected SMPTE352 "
                           "Identifier on jack %d, channel %d of GVI %d.\n",
                           jack, channel, gvi);
                    continue;
                } 
                printf("        - Detected SMPTE352 Identifier: 0x%08x\n",
                       value);
                
                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  link_definition, // display_mask
                                                  NV_CTRL_GVI_DETECTED_CHANNEL_BITS_PER_COMPONENT,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query detected bits per "
                           "component on jack %d, channel %d of GVI %d.\n",
                           jack, channel, gvi);
                    continue;
                } 
                printf("        - Detected bits per component: ");
                switch (value) {
                case NV_CTRL_GVI_BITS_PER_COMPONENT_8:  printf("8");  break;
                case NV_CTRL_GVI_BITS_PER_COMPONENT_10: printf("10"); break;
                case NV_CTRL_GVI_BITS_PER_COMPONENT_12: printf("12"); break;
                case NV_CTRL_GVI_BITS_PER_COMPONENT_UNKNOWN: /* Fall Through */
                default:
                    printf("Unknown");
                    break;
                }
                printf("\n");
                
                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  link_definition, // display_mask
                                                  NV_CTRL_GVI_DETECTED_CHANNEL_COMPONENT_SAMPLING,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query detected component "
                           "sampling on jack %d, channel %d of GVI %d.\n",
                           jack, channel, gvi);
                    continue;
                } 
                printf("        - Detected component sampling: ");
                switch (value) {
                case NV_CTRL_GVI_COMPONENT_SAMPLING_4444: printf("4:4:4:4"); break;
                case NV_CTRL_GVI_COMPONENT_SAMPLING_4224: printf("4:2:2:4"); break;
                case NV_CTRL_GVI_COMPONENT_SAMPLING_444:  printf("4:4:4");   break;
                case NV_CTRL_GVI_COMPONENT_SAMPLING_422:  printf("4:2:2");   break;
                case NV_CTRL_GVI_COMPONENT_SAMPLING_420:  printf("4:2:0");   break;
                case NV_CTRL_GVI_COMPONENT_SAMPLING_UNKNOWN: /* Fall Through */
                default:
                    printf("Unknown");
                    break;
                }
                printf("\n");
                
                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  link_definition, // display_mask
                                                  NV_CTRL_GVI_DETECTED_CHANNEL_COLOR_SPACE,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query detected color space on "
                           "jack %d, channel %d of GVI %d.\n",
                           jack, channel, gvi);
                    continue;
                } 
                printf("        - Detected color space: ");
                switch (value) {
                case NV_CTRL_GVI_COLOR_SPACE_GBR:    printf("GBR");   break;
                case NV_CTRL_GVI_COLOR_SPACE_GBRA:   printf("GBRA");   break;
                case NV_CTRL_GVI_COLOR_SPACE_GBRD:   printf("GBRD");   break;
                case NV_CTRL_GVI_COLOR_SPACE_YCBCR:  printf("YCbCr"); break;
                case NV_CTRL_GVI_COLOR_SPACE_YCBCRA: printf("YCbCrA"); break;
                case NV_CTRL_GVI_COLOR_SPACE_YCBCRD: printf("YCbCrD"); break;
                case NV_CTRL_GVI_COLOR_SPACE_UNKNOWN: /* Fall Through */
                default:
                    printf("Unknown");
                    break;
                }
                printf("\n");
                
                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  link_definition, // display_mask
                                                  NV_CTRL_GVI_DETECTED_CHANNEL_LINK_ID,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query detected link ID on "
                           "jack %d, channel %d of GVI %d.\n",
                           jack, channel, gvi);
                    continue;
                } 
                printf("        - Detected Link ID: Link %d", value);
                if (value == NV_CTRL_GVI_LINK_ID_UNKNOWN) {
                    printf(" (Unknown)");
                } else if (value < 26) {
                    printf(" (Link%c)", (int)('A')+value);
                }
                printf("\n");

            } /* Done querying per-channel information */
        } /* Done querying per-jack information */


        /* Query stream (link to jack+channel) topology */
        ret = XNVCTRLStringOperation(dpy,
                                     NV_CTRL_TARGET_TYPE_GVI,
                                     gvi, // target_id
                                     0, // display_mask
                                     NV_CTRL_STRING_OPERATION_GVI_CONFIGURE_STREAMS,
                                     NULL, // pIn
                                     &pOut);
        if (!ret) {
            printf("  - Failed to query stream topology configuration of "
                   "GVI %d.\n", gvi);
            continue;
        }
        printf("  - Topology:\n");
        printf("\n      %s\n\n", pOut ? pOut : "No streams are configured.");


        /* Query per-stream settings */
        if (pOut) {
            char *str = pOut;
            int i = 0;

            while ( (str = strstr(str, "stream=")) )
            {
                printf("    - Stream %d\n", i);

                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  i, // display_mask (stream #)
                                                  NV_CTRL_GVI_REQUESTED_STREAM_BITS_PER_COMPONENT,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query requested stream bits per component "
                           "for stream %d of GVI %d.\n",
                           i, gvi);
                    continue;
                } 
                printf("        - Requested bits per component: %d (%s)\n", value,
                       BPCName(value));

                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  i, // display_mask (stream #)
                                                  NV_CTRL_GVI_REQUESTED_STREAM_COMPONENT_SAMPLING,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query requested stream component sampling "
                           "for stream %d of GVI %d.\n",
                           i, gvi);
                    continue;
                } 
                printf("        - Requested component sampling: %d (%s)\n", value,
                       SamplingName(value));

                ret = XNVCTRLQueryTargetAttribute(dpy,
                                                  NV_CTRL_TARGET_TYPE_GVI,
                                                  gvi, // target_id
                                                  i, // display_mask (stream #)
                                                  NV_CTRL_GVI_REQUESTED_STREAM_CHROMA_EXPAND,
                                                  &value);
                if (!ret) {
                    printf("        - Failed to query requested stream chroma expand "
                           "for stream %d of GVI %d.\n",
                           i, gvi);
                    continue;
                } 
                printf("        - Requested chroma expand: %s\n",
                       value ? "Enabled" : "Disabled");

                i++;
                str++;
            }
            XFree(pOut);
            pOut = NULL;
        }

    } /* Done Querying information about GVI devices */

} /* do_query() */



static unsigned int firstbit (unsigned int mask)
{
    return mask ^ ((mask - 1) & mask);
}

// List the configuration space of the GVI device.
static void do_listconfig(Display *dpy, int gvi)
{
    NVCTRLAttributeValidValuesRec values;

    unsigned int fmts[3];
    int i;
    char *pOut = NULL;
    Bool ret;

    // Assume GVI device has been configured already.
    if (gvi < 0) {
        gvi = 0;
    }

    printf("Querying Valid Configuring Space of GVI device %d:\n\n", gvi);

    /* Query stream (link to jack+channel) topology */
    ret = XNVCTRLStringOperation(dpy,
                                 NV_CTRL_TARGET_TYPE_GVI,
                                 gvi, // target_id
                                 0, // display_mask
                                 NV_CTRL_STRING_OPERATION_GVI_CONFIGURE_STREAMS,
                                 NULL, // pIn
                                 &pOut);
    if (!ret) {
        printf("  - Failed to query stream topology configuration of "
               "GVI %d.\n", gvi);
        return;
    }
    printf("- Current Topology:\n\n");
    printf("      %s\n\n", pOut ? pOut : "No streams are configured.");
    if (pOut) {
        XFree(pOut);
        pOut = NULL;
    }

    ret = XNVCTRLQueryValidTargetAttributeValues(dpy,
                                                 NV_CTRL_TARGET_TYPE_GVI,
                                                 gvi,
                                                 0, // display_mask
                                                 NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT,
                                                 &values);
    if (!ret) {
        printf("- Failed to query valid video format values(1) of "
               "GVI %d.\n", gvi);
        return;
    }
    fmts[0] = values.u.bits.ints;

    ret = XNVCTRLQueryValidTargetAttributeValues(dpy,
                                                 NV_CTRL_TARGET_TYPE_GVI,
                                                 gvi,
                                                 0, // display_mask
                                                 NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT2,
                                                 &values);
    if (!ret) {
        printf("- Failed to query valid video format values(2) of "
               "GVI %d.\n", gvi);
        return;
    }
    fmts[1] = values.u.bits.ints;

    ret = XNVCTRLQueryValidTargetAttributeValues(dpy,
                                                 NV_CTRL_TARGET_TYPE_GVI,
                                                 gvi,
                                                 0, // display_mask
                                                 NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT3,
                                                 &values);
    if (!ret) {
        printf("- Failed to query valid video format values(3) of "
               "GVI %d.\n", gvi);
        return;
    }
    fmts[2] = values.u.bits.ints;



    printf("- Valid Formats (NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT): %08x\n", fmts[0]);
    printf("- Valid Formats (NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT2): %08x\n", fmts[1]);
    printf("- Valid Formats (NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT3): %08x\n", fmts[2]);

    printf("\n");
    for (i = 0; i < 3; i++) {
        unsigned int fmt_list = fmts[i];
        unsigned int fmt_bit;
        unsigned int fmt;
        unsigned int fmt_flags;

        unsigned int bpcs;
        unsigned int bpc_bit;
        unsigned int bpc;

        unsigned int samplings;
        unsigned int smp_bit;
        unsigned int sampling;


        while (fmt_list) {
            fmt_bit = firstbit(fmt_list);
            fmt_list &= (~fmt_bit);
            fmt = ffs(fmt_bit) - 1 + (32*i);

            printf("\n%s", VideoFormatName(fmt));
            ret = XNVCTRLQueryTargetAttribute(dpy,
                                              NV_CTRL_TARGET_TYPE_GVI,
                                              gvi,
                                              fmt, // display_mask
                                              NV_CTRL_GVIO_VIDEO_FORMAT_FLAGS,
                                              (int *)&fmt_flags);
            if (!ret) {
                printf(" - Failed to query flag bits for video format for "
                       "GVI %d.\n", gvi);
            } else if (fmt_flags == NV_CTRL_GVIO_VIDEO_FORMAT_FLAGS_NONE) {
                printf(" (No flags set): \n");
            } else {
                printf(" (Flags:");
                printf("%c", (fmt_flags & NV_CTRL_GVIO_VIDEO_FORMAT_FLAGS_INTERLACED)        ? 'I' : '_');
                printf("%c", (fmt_flags & NV_CTRL_GVIO_VIDEO_FORMAT_FLAGS_PROGRESSIVE)       ? 'P' : '_');
                printf("%c", (fmt_flags & NV_CTRL_GVIO_VIDEO_FORMAT_FLAGS_PSF)               ? 'F' : '_');
                printf("%c", (fmt_flags & NV_CTRL_GVIO_VIDEO_FORMAT_FLAGS_3G_LEVEL_A)        ? 'A' : '_');
                printf("%c", (fmt_flags & NV_CTRL_GVIO_VIDEO_FORMAT_FLAGS_3G_LEVEL_B)        ? 'B' : '_');
                printf("%c", (fmt_flags & NV_CTRL_GVIO_VIDEO_FORMAT_FLAGS_3G_1080P_NO_12BPC) ? 'N' : '_');
                printf("):\n");
            }


            // Set the video format
            XNVCTRLSetTargetAttribute(dpy,
                                      NV_CTRL_TARGET_TYPE_GVI,
                                      gvi,
                                      0, // display_mask
                                      NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT,
                                      fmt);

            // Get all bits per component (on first jack/channel)
            ret = XNVCTRLQueryValidTargetAttributeValues(dpy,
                                                         NV_CTRL_TARGET_TYPE_GVI,
                                                         gvi,
                                                         0, // jack 0, channel 0
                                                         NV_CTRL_GVI_REQUESTED_STREAM_BITS_PER_COMPONENT,
                                                         &values);
            if (!ret) {
                printf("  - Failed to query valid bits per component "
                       "of GVI %d.\n", gvi);
                continue;
            }

            bpcs = values.u.bits.ints;
            while (bpcs) {
                bpc_bit = firstbit(bpcs);
                bpcs &= (~bpc_bit);
                bpc = ffs(bpc_bit) -1;
                    
                printf("    %s:\n", BPCName(bpc));

                // Set the bits per component
                XNVCTRLSetTargetAttribute(dpy,
                                          NV_CTRL_TARGET_TYPE_GVI,
                                          gvi,
                                          0, // jack 0, channel 0
                                          NV_CTRL_GVI_REQUESTED_STREAM_BITS_PER_COMPONENT,
                                          bpc);


                // Get all component samplings (on first jack/channel)
                ret = XNVCTRLQueryValidTargetAttributeValues(dpy,
                                                             NV_CTRL_TARGET_TYPE_GVI,
                                                             gvi,
                                                             0, // display_mask
                                                             NV_CTRL_GVI_REQUESTED_STREAM_COMPONENT_SAMPLING,
                                                             &values);
                if (!ret) {
                    printf("  - Failed to query valid component sampling "
                           "values of GVI %d.\n", gvi);
                    continue;
                }

                samplings = values.u.bits.ints;
                while (samplings) {
                    smp_bit = firstbit(samplings);
                    samplings &= (~smp_bit);
                    sampling = ffs(smp_bit) -1;

                    printf("        %s\n", SamplingName(sampling));

                } // All component samplings
            } // Add BPC
        } // All formats
    } // All format lists

} /* do_listconfig() */



static void do_configure(Display *dpy, int use_gvi, char *pIn)
{
    Bool ret;
    char *pOut = NULL;


    if (use_gvi < 0) {
        use_gvi = 0;
    }
        
    printf("Configuring GVI device %d:\n\n", use_gvi);
    printf("Setting ");
    if (!pIn) {
        pIn = "stream=0, link0=jack0.0; "
              "stream=1, link0=jack1.0; "
              "stream=2, link0=jack2.0; "
              "stream=3, link0=jack3.0";
        printf("default");
    } else {
        printf("custom");
    }
    printf(" configuration:\n\n");
    printf("  \"%s\"\n\n", pIn);

    ret = XNVCTRLStringOperation(dpy,
                                 NV_CTRL_TARGET_TYPE_GVI,
                                 use_gvi, // target_id 
                                 0, // display_mask
                                 NV_CTRL_STRING_OPERATION_GVI_CONFIGURE_STREAMS,
                                 pIn,
                                 &pOut);
    if (!ret) {
        printf("  - Failed to configure stream topology of GVI %d.\n",
               use_gvi);
        return;
    }
    printf("Topology:\n\n");
    printf("  %s\n\n", pOut ? pOut : "No streams are configured.");
    if (pOut) {
        XFree(pOut);
        pOut = NULL;
    }
}



int main(int argc, char *argv[])
{
    Display *dpy;
    Bool ret;
    int major, minor;
    int use_gvi = -1;
    int i;
    char *topology_str = NULL;

    /*
     * 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));

    /* See if user wants a specific GVI device */

    for (i = 0; i < argc; i++) {
        if ((strcmp(argv[i], "-g") == 0) && ((i+1) < argc)) {
            use_gvi = strtol(argv[i+1], NULL, 10);
        }
        if ((strcmp(argv[i], "-c") == 0) && ((i+1) < argc)) {
            topology_str = argv[i+1];
        }
    }
    
    /* Do what the user wants */

    ret = 0;
    for (i = 0; i < argc; i++) {
        if (strcmp(argv[i], "-q") == 0) {
            do_query(dpy, use_gvi);
            ret = 1;
            break;
        } else if (strcmp(argv[i], "-c") == 0) {
            do_configure(dpy, use_gvi, topology_str);
            ret = 1;
            break;
        } else if (strcmp(argv[i], "-l") == 0) {
            do_listconfig(dpy, use_gvi);
            ret = 1;
        }
    }
    if (!ret) {
        do_help();
    }

    return 0;
}
