static Status Validate(Display *dpy, XvPortID port, int surface_type_id,
unsigned int width, unsigned int height, int flags,
bool *found_port, int *screen, int *chroma_format,
int *mc_type, int *surface_flags,
unsigned short *subpic_max_w,
unsigned short *subpic_max_h)
{
bool found_surface = false;
XvAdaptorInfo *adaptor_info;
unsigned int num_adaptors;
int num_types;
unsigned int max_width = 0, max_height = 0;
Status ret;
assert(dpy);
assert(found_port);
assert(screen);
assert(chroma_format);
assert(mc_type);
assert(surface_flags);
assert(subpic_max_w);
assert(subpic_max_h);
*found_port = false;
for (int i = 0; i < XScreenCount(dpy); ++i) {
ret = XvQueryAdaptors(dpy, XRootWindow(dpy, i), &num_adaptors, &adaptor_info);
if (ret != Success)
return ret;
for (unsigned int j = 0; j < num_adaptors && !*found_port; ++j) {
for (unsigned int k = 0; k < adaptor_info[j].num_ports && !*found_port; ++k) {
XvMCSurfaceInfo *surface_info;
if (adaptor_info[j].base_id + k != port)
continue;
*found_port = true;
surface_info = XvMCListSurfaceTypes(dpy, adaptor_info[j].base_id, &num_types);
if (!surface_info) {
XvFreeAdaptorInfo(adaptor_info);
return BadAlloc;
}
for (int l = 0; l < num_types && !found_surface; ++l) {
if (surface_info[l].surface_type_id != surface_type_id)
continue;
found_surface = true;
max_width = surface_info[l].max_width;
max_height = surface_info[l].max_height;
*chroma_format = surface_info[l].chroma_format;
*mc_type = surface_info[l].mc_type;
*surface_flags = surface_info[l].flags;
*subpic_max_w = surface_info[l].subpicture_max_width;
*subpic_max_h = surface_info[l].subpicture_max_height;
*screen = i;
XVMC_MSG(XVMC_TRACE, "[XvMC] Found requested context surface format.\n" \
"[XvMC] screen=%u, port=%u\n" \
"[XvMC] id=0x%08X\n" \
"[XvMC] max width=%u, max height=%u\n" \
"[XvMC] chroma format=0x%08X\n" \
"[XvMC] acceleration level=0x%08X\n" \
"[XvMC] flags=0x%08X\n" \
"[XvMC] subpicture max width=%u, max height=%u\n",
i, port, surface_type_id, max_width, max_height, *chroma_format,
*mc_type, *surface_flags, *subpic_max_w, *subpic_max_h);
}
free(surface_info);
}
}
XvFreeAdaptorInfo(adaptor_info);
}
if (!*found_port) {
XVMC_MSG(XVMC_ERR, "[XvMC] Could not find a suitable port.\n");
return XvBadPort;
}
if (!found_surface) {
XVMC_MSG(XVMC_ERR, "[XvMC] Could not find a suitable surface.\n");
return BadMatch;
}
if (width > max_width || height > max_height) {
XVMC_MSG(XVMC_ERR, "[XvMC] Requested context dimensions (w=%u,h=%u) too large (max w=%u,h=%u).\n",
width, height, max_width, max_height);
return BadValue;
}
if (flags != XVMC_DIRECT && flags != 0) {
XVMC_MSG(XVMC_ERR, "[XvMC] Invalid context flags 0x%08X.\n", flags);
return BadValue;
}
return Success;
}
static Bool
GetPortId(Display *dpy, XvPortID *portID, int *surface_type)
{
int i, j, k, numAdapt, numTypes, eventBase, errorBase;
XvMCSurfaceInfo *surfaceInfo;
XvAdaptorInfo *info;
Bool result = 0;
if(!XvMCQueryExtension(dpy, &eventBase, &errorBase))
return 0;
if(Success != XvQueryAdaptors(dpy,DefaultRootWindow(dpy),&numAdapt,&info))
return 0;
for(i = 0; i < numAdapt; i++) {
if(info[i].type & XvImageMask) {
surfaceInfo = XvMCListSurfaceTypes(display, info[i].base_id,
&numTypes);
if(surfaceInfo) {
for(j = 0; j < numTypes; j++) {
if((surfaceInfo[j].chroma_format == XVMC_CHROMA_FORMAT_420) &&
(surfaceInfo[j].max_width >= coded_picture_width) &&
(surfaceInfo[j].max_height >= coded_picture_height) &&
((surfaceInfo[j].mc_type == (XVMC_MOCOMP | XVMC_MPEG_2)) ||
(surfaceInfo[j].mc_type == (XVMC_IDCT | XVMC_MPEG_2))))
{
if(use_idct != -1) {
if(use_idct == 1) {
if(surfaceInfo[j].mc_type ==
(XVMC_MOCOMP | XVMC_MPEG_2))
continue;
} else {
if(surfaceInfo[j].mc_type ==
(XVMC_IDCT | XVMC_MPEG_2))
continue;
}
}
for(k = 0; k < info[i].num_ports; k++) {
/* try to grab a port */
if(Success == XvGrabPort(dpy, info[i].base_id + k,
CurrentTime))
{
*portID = info[i].base_id + k;
*surface_type = surfaceInfo[j].surface_type_id;
result = 1;
break;
}
}
if(result) {
if(surfaceInfo[j].flags & XVMC_INTRA_UNSIGNED)
unsignedIntra = 1;
if(surfaceInfo[j].mc_type == (XVMC_IDCT | XVMC_MPEG_2))
useIDCT = 1;
break;
}
}
}
XFree(surfaceInfo);
}
}
}
XvFreeAdaptorInfo(info);
return result;
}