Add control for video subsampling
Add '-s' to assign jpeg subsampling.
0: 444, 1: 420
Using 420 will make video lack of detail compared to 444, but cut
amount of video data by half. This could be useful for some cases.
Change-Id: I48836a7117f7e3b9986e3f5c6a92974c9268525e
Signed-off-by: Jammy Huang <jammy_huang@aspeedtech.com>
diff --git a/ikvm_args.cpp b/ikvm_args.cpp
index 21373aa..19642af 100644
--- a/ikvm_args.cpp
+++ b/ikvm_args.cpp
@@ -8,12 +8,13 @@
namespace ikvm
{
-Args::Args(int argc, char* argv[]) : frameRate(30), calcFrameCRC{false},
+Args::Args(int argc, char* argv[]) : frameRate(30), subsampling(0), calcFrameCRC{false},
commandLine(argc, argv)
{
int option;
- const char* opts = "f:h:k:p:v:c";
+ const char* opts = "f:s:h:k:p:v:c";
struct option lopts[] = {{"frameRate", 1, 0, 'f'},
+ {"subsampling", 1, 0, 's'},
{"help", 0, 0, 'h'},
{"keyboard", 1, 0, 'k'},
{"mouse", 1, 0, 'p'},
@@ -30,6 +31,11 @@
if (frameRate < 0 || frameRate > 60)
frameRate = 30;
break;
+ case 's':
+ subsampling = (int)strtol(optarg, NULL, 0);
+ if (subsampling < 0 || subsampling > 1)
+ subsampling = 0;
+ break;
case 'h':
printUsage();
exit(0);
@@ -55,6 +61,7 @@
fprintf(stderr, "OpenBMC IKVM daemon\n");
fprintf(stderr, "Usage: obmc-ikvm [options]\n");
fprintf(stderr, "-f frame rate try this frame rate\n");
+ fprintf(stderr, "-s subsampling try this subsampling\n");
fprintf(stderr, "-h, --help show this message and exit\n");
fprintf(stderr, "-k device HID keyboard gadget device\n");
fprintf(stderr, "-p device HID mouse gadget device\n");