1 files changed, 85 insertions, 0 deletions
diff --git a/src/libXvMC/block.c b/src/libXvMC/block.c
new file mode 100644
index 00000000000..b56348d4645
--- /dev/null
+++ b/src/libXvMC/block.c
@@ -0,0 +1,85 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/XvMC.h>
+#include <vl_context.h>
+
+/*
+ * XvMC defines 64 element blocks (8x8 elements).
+ * Elements are 8 bits when they represent color values,
+ * 9 bits when they reprecent DCT coefficients, we
+ * store them in 2 bytes in either case. DCT coefficients
+ * can be signed or unsigned, at our option.
+ */
+#define BLOCK_SIZE (64 * 2)
+
+Status XvMCCreateBlocks(Display *display, XvMCContext *context, unsigned int num_blocks, XvMCBlockArray *blocks)
+{
+	struct vl_context *vl_ctx;
+	
+	assert(display);
+	
+	if (!context)
+		return XvMCBadContext;
+	if (num_blocks == 0)
+		return BadValue;
+	
+	assert(blocks);
+	
+	vl_ctx = context->privData;
+	assert(display == vl_ctx->display);
+
+	blocks->context_id = context->context_id;
+	blocks->num_blocks = num_blocks;
+	blocks->blocks = malloc(BLOCK_SIZE * num_blocks);
+	/* Since we don't have a VL type for blocks, set privData to the display so we can catch mismatches */
+	blocks->privData = display;
+	
+	return Success;
+}
+
+Status XvMCDestroyBlocks(Display *display, XvMCBlockArray *blocks)
+{	
+	assert(display);
+	assert(blocks);
+	assert(display == blocks->privData);
+	free(blocks->blocks);
+	
+	return Success;
+}
+
+Status XvMCCreateMacroBlocks(Display *display, XvMCContext *context, unsigned int num_blocks, XvMCMacroBlockArray *blocks)
+{
+	struct vl_context *vl_ctx;
+	
+	assert(display);
+	
+	if (!context)
+		return XvMCBadContext;
+	if (num_blocks == 0)
+		return BadValue;
+	
+	assert(blocks);
+	
+	vl_ctx = context->privData;
+	assert(display == vl_ctx->display);
+	
+	blocks->context_id = context->context_id;
+	blocks->num_blocks = num_blocks;
+	blocks->macro_blocks = malloc(sizeof(XvMCMacroBlock) * num_blocks);
+	/* Since we don't have a VL type for blocks, set privData to the display so we can catch mismatches */
+	blocks->privData = display;
+	
+	return Success;
+}
+
+Status XvMCDestroyMacroBlocks(Display *display, XvMCMacroBlockArray *blocks)
+{	
+	assert(display);
+	assert(blocks);
+	assert(display == blocks->privData);
+	free(blocks->macro_blocks);
+	
+	return Success;
+}
+