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author | Corentin Chary <corentincj@iksaif.net> | 2011-02-04 09:05:55 +0100 |
---|---|---|
committer | Anthony Liguori <aliguori@us.ibm.com> | 2011-02-23 16:28:28 -0600 |
commit | 999342a0fe959dcd549396a255a04d000678e910 (patch) | |
tree | 691a2efef3cf2d56c704e946360d8cf9ec8cd288 /ui/vnc.h | |
parent | b31f519e278601225c53519e3b16333d86770ecf (diff) | |
download | hqemu-999342a0fe959dcd549396a255a04d000678e910.zip hqemu-999342a0fe959dcd549396a255a04d000678e910.tar.gz |
vnc: add a way to get the update frequency for a given region
This patch compute the update frequency (in Hz) for each 64x64 rects.
Any adaptive encoding can get this value using vnc_update_freq(), and
switch to a lossy encoding if the value is too high.
The frequency is pre-calculated every 500ms, based on the last 10
updates per 64x64 rect.
If a 64x64 rect was not updated in the last 2 second, then the frequency
became 0, and all the stored timestamp are reseted.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'ui/vnc.h')
-rw-r--r-- | ui/vnc.h | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -80,6 +80,10 @@ typedef void VncSendHextileTile(VncState *vs, #define VNC_MAX_HEIGHT 2048 #define VNC_DIRTY_WORDS (VNC_MAX_WIDTH / (16 * 32)) +#define VNC_STAT_RECT 64 +#define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT) +#define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT) + #define VNC_AUTH_CHALLENGE_SIZE 16 typedef struct VncDisplay VncDisplay; @@ -92,9 +96,23 @@ typedef struct VncDisplay VncDisplay; #include "vnc-auth-sasl.h" #endif +struct VncRectStat +{ + /* time of last 10 updates, to find update frequency */ + struct timeval times[10]; + int idx; + + double freq; /* Update frequency (in Hz) */ + bool updated; /* Already updated during this refresh */ +}; + +typedef struct VncRectStat VncRectStat; + struct VncSurface { + struct timeval last_freq_check; uint32_t dirty[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS]; + VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS]; DisplaySurface *ds; }; @@ -479,6 +497,7 @@ void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, int32_t encoding); void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v); +double vnc_update_freq(VncState *vs, int x, int y, int w, int h); /* Encodings */ int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); |