1 files changed, 154 insertions, 0 deletions
diff --git a/src/libXvMC/context.c b/src/libXvMC/context.c
new file mode 100644
index 00000000000..c835a6acf7a
--- /dev/null
+++ b/src/libXvMC/context.c
@@ -0,0 +1,154 @@
+#include <assert.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/XvMClib.h>
+#include <vl_context.h>
+#include <xsp_winsys.h>
+
+static Status Validate(Display *display, XvPortID port, int surface_type_id, unsigned int width, unsigned int height, int flags, int *chroma_format)
+{
+	unsigned int	found_port = 0;
+	unsigned int	found_surface = 0;
+	XvAdaptorInfo	*adaptor_info;
+	unsigned int	num_adaptors;
+	int		num_types;
+	unsigned int	max_width, max_height;
+	Status		ret;
+	unsigned int	i, j, k;
+	
+	assert(display && chroma_format);
+	
+	ret = XvQueryAdaptors(display, XDefaultRootWindow(display), &num_adaptors, &adaptor_info);
+	if (ret != Success)
+		return ret;
+	
+	/* Scan through all adaptors looking for this port and surface */
+	for (i = 0; i < num_adaptors && !found_port; ++i)
+	{
+		/* Scan through all ports of this adaptor looking for our port */
+		for (j = 0; j < adaptor_info[i].num_ports && !found_port; ++j)
+		{
+			/* If this is our port, scan through all its surfaces looking for our surface */
+			if (adaptor_info[i].base_id + j == port)
+			{
+				XvMCSurfaceInfo *surface_info;
+				
+				found_port = 1;
+				surface_info = XvMCListSurfaceTypes(display, adaptor_info[i].base_id, &num_types);
+				
+				if (surface_info)
+				{
+					for (k = 0; k < num_types && !found_surface; ++k)
+					{
+						if (surface_info[k].surface_type_id == surface_type_id)
+						{
+							found_surface = 1;
+							max_width = surface_info[k].max_width;
+							max_height = surface_info[k].max_height;
+							*chroma_format = surface_info[k].chroma_format;
+						}
+					}
+					
+					XFree(surface_info);
+				}
+				else
+				{
+					XvFreeAdaptorInfo(adaptor_info);
+					return BadAlloc;
+				}
+			}
+		}
+	}
+	
+	XvFreeAdaptorInfo(adaptor_info);
+	
+	if (!found_port)
+		return XvBadPort;
+	if (!found_surface)
+		return BadMatch;
+	if (width > max_width || height > max_height)
+		return BadValue;
+	if (flags != XVMC_DIRECT && flags != 0)
+		return BadValue;
+	
+	return Success;
+}
+
+static enum VL_FORMAT FormatToVL(int xvmc_format)
+{
+	enum VL_FORMAT vl_format;
+	
+	switch (xvmc_format)
+	{
+		case XVMC_CHROMA_FORMAT_420:
+		{
+			vl_format = VL_FORMAT_YCBCR_420;
+			break;
+		}
+		case XVMC_CHROMA_FORMAT_422:
+		{
+			vl_format = VL_FORMAT_YCBCR_422;
+			break;
+		}
+		case XVMC_CHROMA_FORMAT_444:
+		{
+			vl_format = VL_FORMAT_YCBCR_444;
+			break;
+		}
+		default:
+			assert(0);
+	}
+	
+	return vl_format;
+}
+
+Status XvMCCreateContext(Display *display, XvPortID port, int surface_type_id, int width, int height, int flags, XvMCContext *context)
+{
+	int			chroma_format;
+	Status			ret;
+	struct VL_CONTEXT	*vl_ctx;
+	struct pipe_context	*pipe;
+	
+	assert(display);
+	
+	if (!context)
+		return XvMCBadContext;
+	
+	ret = Validate(display, port, surface_type_id, width, height, flags, &chroma_format);
+	if (ret != Success)
+		return ret;
+	
+	pipe = create_pipe_context(display);
+	
+	assert(pipe);
+	
+	vlCreateContext(display, pipe, width, height, FormatToVL(chroma_format), &vl_ctx);
+	
+	context->context_id = XAllocID(display);
+	context->surface_type_id = surface_type_id;
+	context->width = width;
+	context->height = height;
+	context->flags = flags;
+	context->port = port;
+	context->privData = vl_ctx;
+	
+	return Success;
+}
+
+Status XvMCDestroyContext(Display *display, XvMCContext *context)
+{
+	struct VL_CONTEXT *vl_ctx;
+	
+	assert(display);
+	
+	if (!context)
+		return XvMCBadContext;
+	
+	vl_ctx = context->privData;
+	
+	assert(display == vl_ctx->display);
+	
+	vlDestroyContext(vl_ctx);
+	
+	return Success;
+}
+