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log: Support for 256color terminals 

And provide extended coloring capabilities for debugging.
The default colors do not change in 256 more to keep
supporting people using Black on White, White on Black and
Solarized terminals.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Luca Barbato 2013-04-26 15:12:05 +02:00
parent 006c253346
commit 7763118cae
4 changed files with 53 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
doc/APIchanges
View File

@ -13,6 +13,9 @@ libavutil: 2013-12-xx
API changes, most recent first:
2014-04-xx - xxxxxxx - lavu 53.09.0 - log.h
Add AV_LOG(c) macro to have 256 color debug messages.
2014-02-xx - xxxxxxx - lavu 53.08.0 - frame.h
Add av_frame_remove_side_data() for removing a single side data
instance from a frame.

63
libavutil/log.c
View File

@ -53,35 +53,50 @@ static HANDLE con;
#else
static const uint8_t color[] = { 0x41, 0x41, 0x11, 0x03, 9, 0x02, 0x06 };
#define set_color(x) fprintf(stderr, "\033[%d;3%dm", color[x] >> 4, color[x]&15)
#define print_256color(x) fprintf(stderr, "\033[38;5;%dm", x)
#define reset_color() fprintf(stderr, "\033[0m")
#endif
static int use_color = -1;
static void colored_fputs(int level, const char *str)
static void check_color_terminal(void)
{
if (use_color < 0) {
#if HAVE_SETCONSOLETEXTATTRIBUTE
CONSOLE_SCREEN_BUFFER_INFO con_info;
con = GetStdHandle(STD_ERROR_HANDLE);
use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") &&
!getenv("AV_LOG_FORCE_NOCOLOR");
if (use_color) {
GetConsoleScreenBufferInfo(con, &con_info);
attr_orig = con_info.wAttributes;
background = attr_orig & 0xF0;
}
#elif HAVE_ISATTY
use_color = !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR") &&
(getenv("TERM") && isatty(2) ||
getenv("AV_LOG_FORCE_COLOR"));
#else
use_color = getenv("AV_LOG_FORCE_COLOR") && !getenv("NO_COLOR") &&
!getenv("AV_LOG_FORCE_NOCOLOR");
#endif
}
CONSOLE_SCREEN_BUFFER_INFO con_info;
con = GetStdHandle(STD_ERROR_HANDLE);
use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") &&
!getenv("AV_LOG_FORCE_NOCOLOR");
if (use_color) {
GetConsoleScreenBufferInfo(con, &con_info);
attr_orig = con_info.wAttributes;
background = attr_orig & 0xF0;
}
#elif HAVE_ISATTY
char *term = getenv("TERM");
use_color = !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR") &&
(getenv("TERM") && isatty(2) || getenv("AV_LOG_FORCE_COLOR"));
use_color += !!strstr(term, "256color") ;
#else
use_color = getenv("AV_LOG_FORCE_COLOR") && !getenv("NO_COLOR") &&
!getenv("AV_LOG_FORCE_NOCOLOR");
#endif
}
static void colored_fputs(int level, int tint, const char *str)
{
if (use_color < 0)
check_color_terminal();
switch (use_color) {
case 1:
set_color(level);
break;
case 2:
set_color(level);
if (tint)
print_256color(tint);
break;
default:
break;
}
fputs(str, stderr);
if (use_color) {
@ -102,6 +117,10 @@ void av_log_default_callback(void *avcl, int level, const char *fmt, va_list vl)
char line[1024];
static int is_atty;
AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
int tint = av_clip(level >> 8, 0, 256);
level &= 0xff;
if (level > av_log_level)
return;
line[0] = 0;
@ -138,7 +157,7 @@ void av_log_default_callback(void *avcl, int level, const char *fmt, va_list vl)
fprintf(stderr, " Last message repeated %d times\n", count);
count = 0;
}
colored_fputs(av_clip(level >> 3, 0, 6), line);
colored_fputs(av_clip(level >> 3, 0, 6), tint, line);
av_strlcpy(prev, line, sizeof line);
}

8
libavutil/log.h
View File

@ -143,6 +143,14 @@ typedef struct AVClass {
*/
#define AV_LOG_DEBUG 48
/**
* Sets additional colors for extended debugging sessions.
* Requires 256color terminal support. Use outside debugging is not
* recommended.
*/
#define AV_LOG_C(x) (x << 8)
/**
* @}
*/

2
libavutil/version.h
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@ -54,7 +54,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 53
#define LIBAVUTIL_VERSION_MINOR 8
#define LIBAVUTIL_VERSION_MINOR 9
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \