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msg: add function to reduce log level 

Sometimes it's helpful to override this for specific mp_log instances,
because in some specific circumstances you just want to suppress log
file noise you never want to see.

-1 is an allowed value (for suppressing MSGL_FATAL==0). It looks like
the libplacebo wrapper still does this wrong, so it will probably
trigger UB in some cases. I guess I don't care, though.
This commit is contained in:
wm4 2020-05-10 16:40:26 +02:00
parent 0b09771ba9
commit a600d152d2
2 changed files with 19 additions and 2 deletions
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19
common/msg.c
View File

@ -86,6 +86,7 @@ struct mp_log {
struct mp_log_root *root;
const char *prefix;
const char *verbose_prefix;
int max_level; // minimum log level for this instance
int level; // minimum log level for any outputs
int terminal_level; // minimum log level for terminal output
atomic_ulong reload_counter;
@ -125,8 +126,6 @@ static void update_loglevel(struct mp_log *log)
struct mp_log_root *root = log->root;
pthread_mutex_lock(&root->lock);
log->level = MSGL_STATUS + root->verbose; // default log level
if (root->really_quiet)
log->level -= 10;
for (int n = 0; root->msg_levels && root->msg_levels[n * 2 + 0]; n++) {
if (match_mod(log->verbose_prefix, root->msg_levels[n * 2 + 0]))
log->level = mp_msg_find_level(root->msg_levels[n * 2 + 1]);
@ -143,10 +142,25 @@ static void update_loglevel(struct mp_log *log)
log->level = MPMAX(log->level, MSGL_DEBUG);
if (log->root->stats_file)
log->level = MPMAX(log->level, MSGL_STATS);
log->level = MPMIN(log->level, log->max_level);
if (root->really_quiet)
log->level = -1;
atomic_store(&log->reload_counter, atomic_load(&log->root->reload_counter));
pthread_mutex_unlock(&root->lock);
}
// Set (numerically) the maximum level that should still be output for this log
// instances. E.g. lev=MSGL_WARN => show only warnings and errors.
void mp_msg_set_max_level(struct mp_log *log, int lev)
{
if (!log->root)
return;
pthread_mutex_lock(&log->root->lock);
log->max_level = MPCLAMP(lev, -1, MSGL_MAX);
pthread_mutex_unlock(&log->root->lock);
update_loglevel(log);
}
// Get the current effective msg level.
// Thread-safety: see mp_msg().
int mp_msg_level(struct mp_log *log)
@ -456,6 +470,7 @@ struct mp_log *mp_log_new(void *talloc_ctx, struct mp_log *parent,
talloc_set_destructor(log, destroy_log);
log->root = parent->root;
log->partial = talloc_strdup(NULL, "");
log->max_level = MSGL_MAX;
if (name) {
if (name[0] == '!') {
name = &name[1];

2
common/msg.h
View File

@ -60,6 +60,8 @@ static inline bool mp_msg_test(struct mp_log *log, int lev)
return lev <= mp_msg_level(log);
}
void mp_msg_set_max_level(struct mp_log *log, int lev);
// Convenience macros.
#define mp_fatal(log, ...) mp_msg(log, MSGL_FATAL, __VA_ARGS__)
#define mp_err(log, ...) mp_msg(log, MSGL_ERR, __VA_ARGS__)