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/*
* log functions
* Copyright (c) 2003 Michel Bardiaux
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* logging functions
*/
#include "config.h"
#if HAVE_ISATTY
#include <unistd.h>
#endif
#include <stdlib.h>
#include "avstring.h"
#include "avutil.h"
#include "log.h"
static int av_log_level = AV_LOG_INFO;
static int flags;
#if defined(_WIN32) && !defined(__MINGW32CE__)
#include <windows.h>
static const uint8_t color[] = { 12, 12, 12, 14, 7, 10, 11 };
static int16_t background, attr_orig;
static HANDLE con;
#define set_color(x) SetConsoleTextAttribute(con, background | color[x])
#define reset_color() SetConsoleTextAttribute(con, attr_orig)
#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 reset_color() fprintf(stderr, "\033[0m")
#endif
static int use_color = -1;
#undef fprintf
static void colored_fputs(int level, const char *str)
{
if (use_color < 0) {
#if defined(_WIN32) && !defined(__MINGW32CE__)
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
}
if (use_color) {
set_color(level);
}
fputs(str, stderr);
if (use_color) {
reset_color();
}
}
const char *av_default_item_name(void *ptr)
{
return (*(AVClass **) ptr)->class_name;
}
void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
{
static int print_prefix = 1;
static int count;
static char prev[1024];
char line[1024];
static int is_atty;
AVClass* avc = ptr ? *(AVClass **) ptr : NULL;
if (level > av_log_level)
return;
line[0] = 0;
#undef fprintf
if (print_prefix && avc) {
if (avc->parent_log_context_offset) {
AVClass** parent = *(AVClass ***) (((uint8_t *) ptr) +
avc->parent_log_context_offset);
if (parent && *parent) {
snprintf(line, sizeof(line), "[%s @ %p] ",
(*parent)->item_name(parent), parent);
}
}
snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p] ",
avc->item_name(ptr), ptr);
}
vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);
print_prefix = strlen(line) && line[strlen(line) - 1] == '\n';
#if HAVE_ISATTY
if (!is_atty)
is_atty = isatty(2) ? 1 : -1;
#endif
if (print_prefix && (flags & AV_LOG_SKIP_REPEATED) &&
!strncmp(line, prev, sizeof line)) {
count++;
if (is_atty == 1)
fprintf(stderr, " Last message repeated %d times\r", count);
return;
}
if (count > 0) {
fprintf(stderr, " Last message repeated %d times\n", count);
count = 0;
}
colored_fputs(av_clip(level >> 3, 0, 6), line);
av_strlcpy(prev, line, sizeof line);
}
static void (*av_log_callback)(void*, int, const char*, va_list) =
av_log_default_callback;
void av_log(void* avcl, int level, const char *fmt, ...)
{
AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
va_list vl;
va_start(vl, fmt);
if (avc && avc->version >= (50 << 16 | 15 << 8 | 2) &&
avc->log_level_offset_offset && level >= AV_LOG_FATAL)
level += *(int *) (((uint8_t *) avcl) + avc->log_level_offset_offset);
av_vlog(avcl, level, fmt, vl);
va_end(vl);
}
void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
{
av_log_callback(avcl, level, fmt, vl);
}
int av_log_get_level(void)
{
return av_log_level;
}
void av_log_set_level(int level)
{
av_log_level = level;
}
void av_log_set_flags(int arg)
{
flags = arg;
}
void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
{
av_log_callback = callback;
}
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