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kvm.853
kvm-qemu-preXX-vnc-tight-use-the-update-frequen...
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File kvm-qemu-preXX-vnc-tight-use-the-update-frequency-to-choo.patch of Package kvm.853
From ce702e93b0b99562ed42ba5c078914f2209b9a6a Mon Sep 17 00:00:00 2001 From: Corentin Chary <corentincj@iksaif.net> Date: Fri, 4 Feb 2011 09:05:57 +0100 Subject: [PATCH] vnc: tight: use the update frequency to choose between lossy and lossless Use the new update frequency infrastructure to use jpeg for regions with high update frequency. Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> --- ui/vnc-enc-tight.c | 75 +++++++++++++++++++++++++++++++++++++++++++--------- 1 files changed, 62 insertions(+), 13 deletions(-) diff --git a/ui/vnc-enc-tight.c b/ui/vnc-enc-tight.c index af45edd..ad9a9a8 100644 --- a/ui/vnc-enc-tight.c +++ b/ui/vnc-enc-tight.c @@ -72,6 +72,26 @@ static const struct { static int tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); +#ifdef CONFIG_VNC_JPEG +static const struct { + double jpeg_freq_min; /* Don't send JPEG if the freq is bellow */ + double jpeg_freq_threshold; /* Always send JPEG if the freq is above */ + int jpeg_idx; /* Allow indexed JPEG */ + int jpeg_full; /* Allow full color JPEG */ +} tight_jpeg_conf[] = { + { 0, 4, 1, 1 }, + { 0, 4, 1, 1 }, + { 0, 4, 1, 1 }, + { 0, 4, 1, 1 }, + { 0, 4, 0, 1 }, + { 0.1, 4, 0, 1 }, + { 0.2, 4, 0, 1 }, + { 0.3, 6, 0, 0 }, + { 0.4, 8, 0, 0 }, + { 0.5, 10, 0, 0 }, +}; +#endif + #ifdef CONFIG_VNC_PNG static const struct { int png_zlib_level, png_filters; @@ -1476,12 +1496,13 @@ static int send_sub_rect_nojpeg(VncState *vs, int x, int y, int w, int h, #ifdef CONFIG_VNC_JPEG static int send_sub_rect_jpeg(VncState *vs, int x, int y, int w, int h, int bg, int fg, int colors, - VncPalette *palette) + VncPalette *palette, bool force) { int ret; if (colors == 0) { - if (tight_detect_smooth_image(vs, w, h)) { + if (force || (tight_jpeg_conf[vs->tight.quality].jpeg_full && + tight_detect_smooth_image(vs, w, h))) { int quality = tight_conf[vs->tight.quality].jpeg_quality; ret = send_jpeg_rect(vs, x, y, w, h, quality); @@ -1493,8 +1514,9 @@ static int send_sub_rect_jpeg(VncState *vs, int x, int y, int w, int h, } else if (colors == 2) { ret = send_mono_rect(vs, x, y, w, h, bg, fg); } else if (colors <= 256) { - if (colors > 96 && - tight_detect_smooth_image(vs, w, h)) { + if (force || (colors > 96 && + tight_jpeg_conf[vs->tight.quality].jpeg_idx && + tight_detect_smooth_image(vs, w, h))) { int quality = tight_conf[vs->tight.quality].jpeg_quality; ret = send_jpeg_rect(vs, x, y, w, h, quality); @@ -1514,6 +1536,8 @@ static int send_sub_rect(VncState *vs, int x, int y, int w, int h) uint32_t bg = 0, fg = 0; int colors; int ret = 0; + bool force_jpeg = false; + bool allow_jpeg = true; vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type); @@ -1521,11 +1545,26 @@ static int send_sub_rect(VncState *vs, int x, int y, int w, int h) vnc_raw_send_framebuffer_update(vs, x, y, w, h); vnc_tight_stop(vs); +#ifdef CONFIG_VNC_JPEG + if (vs->tight.quality != -1) { + double freq = vnc_update_freq(vs, x, y, w, h); + + if (freq < tight_jpeg_conf[vs->tight.quality].jpeg_freq_min) { + allow_jpeg = false; + } + if (freq >= tight_jpeg_conf[vs->tight.quality].jpeg_freq_threshold) { + force_jpeg = true; + vnc_sent_lossy_rect(vs, x, y, w, h); + } + } +#endif + colors = tight_fill_palette(vs, x, y, w * h, &fg, &bg, &palette); #ifdef CONFIG_VNC_JPEG - if (vs->tight.quality != (uint8_t)-1) { - ret = send_sub_rect_jpeg(vs, x, y, w, h, bg, fg, colors, palette); + if (allow_jpeg && vs->tight.quality != (uint8_t)-1) { + ret = send_sub_rect_jpeg(vs, x, y, w, h, bg, fg, colors, palette, + force_jpeg); } else { ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, palette); } @@ -1548,7 +1587,8 @@ static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h) return send_solid_rect(vs); } -static int send_rect_simple(VncState *vs, int x, int y, int w, int h) +static int send_rect_simple(VncState *vs, int x, int y, int w, int h, + bool split) { int max_size, max_width; int max_sub_width, max_sub_height; @@ -1559,7 +1599,7 @@ static int send_rect_simple(VncState *vs, int x, int y, int w, int h) max_size = tight_conf[vs->tight.compression].max_rect_size; max_width = tight_conf[vs->tight.compression].max_rect_width; - if (w > max_width || w * h > max_size) { + if (split && (w > max_width || w * h > max_size)) { max_sub_width = (w > max_width) ? max_width : w; max_sub_height = max_size / max_sub_width; @@ -1590,7 +1630,7 @@ static int find_large_solid_color_rect(VncState *vs, int x, int y, /* If a rectangle becomes too large, send its upper part now. */ if (dy - y >= max_rows) { - n += send_rect_simple(vs, x, y, w, max_rows); + n += send_rect_simple(vs, x, y, w, max_rows, true); y += max_rows; h -= max_rows; } @@ -1629,7 +1669,7 @@ static int find_large_solid_color_rect(VncState *vs, int x, int y, /* Send rectangles at top and left to solid-color area. */ if (y_best != y) { - n += send_rect_simple(vs, x, y, w, y_best-y); + n += send_rect_simple(vs, x, y, w, y_best-y, true); } if (x_best != x) { n += tight_send_framebuffer_update(vs, x, y_best, @@ -1656,7 +1696,7 @@ static int find_large_solid_color_rect(VncState *vs, int x, int y, return n; } } - return n + send_rect_simple(vs, x, y, w, h); + return n + send_rect_simple(vs, x, y, w, h, true); } static int tight_send_framebuffer_update(VncState *vs, int x, int y, @@ -1671,8 +1711,17 @@ static int tight_send_framebuffer_update(VncState *vs, int x, int y, vs->tight.pixel24 = false; } - if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE) - return send_rect_simple(vs, x, y, w, h); + if (vs->tight.quality != -1) { + double freq = vnc_update_freq(vs, x, y, w, h); + + if (freq > tight_jpeg_conf[vs->tight.quality].jpeg_freq_threshold) { + return send_rect_simple(vs, x, y, w, h, false); + } + } + + if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE) { + return send_rect_simple(vs, x, y, w, h, true); + } /* Calculate maximum number of rows in one non-solid rectangle. */ -- 1.6.0.2
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