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gstinfo: Optimize color escape code creation

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When coloring is in use, those escape codes are going to be created many times
for almost all debug lines.

Don't create plenty of temporary allocations, and instead build the escape code
ourselves statically

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3498>
This commit is contained in:
Edward Hervey 2022-12-01 08:16:45 +01:00 committed by GStreamer Marge Bot
parent 4b96294f19
commit 9f9e625776
1 changed files with 36 additions and 22 deletions
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58
subprojects/gstreamer/gst/gstinfo.c
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@ -1044,6 +1044,37 @@ gst_info_printf_pointer_extension_func (const char *format, void *ptr)
return s;
}
/* Allocation-less generator of color escape code. Provide a 20 byte write
* area */
static void
_construct_term_color (guint colorinfo, gchar write_area[20])
{
guint offset;
memcpy (write_area, "\033[00", 4);
offset = 4;
if (colorinfo & GST_DEBUG_BOLD) {
memcpy (write_area + offset, ";01", 3);
offset += 3;
}
if (colorinfo & GST_DEBUG_UNDERLINE) {
memcpy (write_area + offset, ";04", 3);
offset += 3;
}
if (colorinfo & GST_DEBUG_FG_MASK) {
memcpy (write_area + offset, ";3", 2);
write_area[offset + 2] = '0' + (colorinfo & GST_DEBUG_FG_MASK);
offset += 3;
}
if (colorinfo & GST_DEBUG_BG_MASK) {
memcpy (write_area + offset, ";4", 2);
write_area[offset + 2] = '0' + ((colorinfo & GST_DEBUG_BG_MASK) >> 4);
offset += 3;
}
strncpy (write_area + offset, "m", 2);
}
/**
* gst_debug_construct_term_color:
* @colorinfo: the color info
@ -1058,26 +1089,11 @@ gst_info_printf_pointer_extension_func (const char *format, void *ptr)
gchar *
gst_debug_construct_term_color (guint colorinfo)
{
GString *color;
gchar tmp_color[20];
color = g_string_new ("\033[00");
_construct_term_color (colorinfo, tmp_color);
if (colorinfo & GST_DEBUG_BOLD) {
g_string_append_len (color, ";01", 3);
}
if (colorinfo & GST_DEBUG_UNDERLINE) {
g_string_append_len (color, ";04", 3);
}
if (colorinfo & GST_DEBUG_FG_MASK) {
g_string_append_printf (color, ";3%1d", colorinfo & GST_DEBUG_FG_MASK);
}
if (colorinfo & GST_DEBUG_BG_MASK) {
g_string_append_printf (color, ";4%1d",
(colorinfo & GST_DEBUG_BG_MASK) >> 4);
}
g_string_append_c (color, 'm');
return g_string_free (color, FALSE);
return g_strdup (tmp_color);
}
/**
@ -1374,13 +1390,12 @@ gst_debug_log_default (GstDebugCategory * category, GstDebugLevel level,
if (color_mode == GST_DEBUG_COLOR_MODE_UNIX) {
#endif
/* colors, non-windows */
gchar *color = NULL;
gchar color[20];
const gchar *clear;
gchar pidcolor[10];
const gchar *levelcolor;
color = gst_debug_construct_term_color (gst_debug_category_get_color
(category));
_construct_term_color (gst_debug_category_get_color (category), color);
clear = "\033[00m";
g_sprintf (pidcolor, "\033[%02dm", pid % 6 + 31);
levelcolor = levelcolormap[level];
@ -1393,7 +1408,6 @@ gst_debug_log_default (GstDebugCategory * category, GstDebugLevel level,
clear, message_str);
FFLUSH_DEBUG (log_file);
#undef PRINT_FMT
g_free (color);
#ifdef G_OS_WIN32
} else {
/* colors, windows. */