mirror of
https://github.com/mpv-player/mpv
synced 2024-12-16 20:05:07 +00:00
ffe894ec0a
Make it accept "," as separator, instead of only ":". Do this by using the key-value-list parser. Before this, the option was stored as a string, with the option parser verifying that the option value as correct. Now it's stored pre-parsed, although the log levels still require separate verification and parsing-on-use to some degree (which is why the msg-level option type doesn't go away). Because the internal type changes, the client API "native" type also changes. This could be prevented with some more effort, but I don't think it's worth it - if MPV_FORMAT_STRING is used, it still works the same, just with a different separator on read accesses.
650 lines
19 KiB
C
650 lines
19 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include <assert.h>
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#include <pthread.h>
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#include <stdint.h>
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#include "talloc.h"
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#include "misc/bstr.h"
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#include "osdep/atomics.h"
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#include "common/common.h"
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#include "common/global.h"
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#include "misc/ring.h"
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#include "options/options.h"
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#include "osdep/terminal.h"
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#include "osdep/io.h"
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#include "osdep/timer.h"
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#include "libmpv/client.h"
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#include "msg.h"
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#include "msg_control.h"
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/* maximum message length of mp_msg */
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#define MSGSIZE_MAX 6144
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struct mp_log_root {
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struct mpv_global *global;
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// --- protected by mp_msg_lock
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char **msg_levels;
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bool use_terminal; // make accesses to stderr/stdout
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bool module;
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bool show_time;
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bool termosd; // use terminal control codes for status line
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int blank_lines; // number of lines useable by status
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int status_lines; // number of current status lines
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bool color;
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int verbose;
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bool force_stderr;
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struct mp_log_buffer **buffers;
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int num_buffers;
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FILE *log_file;
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FILE *stats_file;
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// --- semi-atomic access
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bool mute;
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// --- must be accessed atomically
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/* This is incremented every time the msglevels must be reloaded.
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* (This is perhaps better than maintaining a globally accessible and
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* synchronized mp_log tree.) */
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atomic_ulong reload_counter;
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// --- protected by mp_msg_lock
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char buffer[MSGSIZE_MAX];
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};
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struct mp_log {
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struct mp_log_root *root;
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const char *prefix;
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const char *verbose_prefix;
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int level; // minimum log level for any outputs
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int terminal_level; // minimum log level for terminal output
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atomic_ulong reload_counter;
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};
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struct mp_log_buffer {
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struct mp_log_root *root;
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struct mp_ring *ring;
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int level;
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void (*wakeup_cb)(void *ctx);
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void *wakeup_cb_ctx;
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};
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// Protects some (not all) state in mp_log_root
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static pthread_mutex_t mp_msg_lock = PTHREAD_MUTEX_INITIALIZER;
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static const struct mp_log null_log = {0};
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struct mp_log *const mp_null_log = (struct mp_log *)&null_log;
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static bool match_mod(const char *name, const char *mod)
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{
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if (!strcmp(mod, "all"))
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return true;
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// Path prefix matches
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bstr b = bstr0(name);
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return bstr_eatstart0(&b, mod) && (bstr_eatstart0(&b, "/") || !b.len);
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}
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static void update_loglevel(struct mp_log *log)
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{
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struct mp_log_root *root = log->root;
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pthread_mutex_lock(&mp_msg_lock);
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log->level = -1;
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log->terminal_level = -1;
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if (log->root->use_terminal) {
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log->level = MSGL_STATUS + log->root->verbose; // default log level
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for (int n = 0; root->msg_levels && root->msg_levels[n * 2 + 0]; n++) {
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if (match_mod(log->verbose_prefix, root->msg_levels[n * 2 + 0]))
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log->level = mp_msg_find_level(root->msg_levels[n * 2 + 1]);
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}
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log->terminal_level = log->root->use_terminal ? log->level : -1;
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}
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for (int n = 0; n < log->root->num_buffers; n++)
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log->level = MPMAX(log->level, log->root->buffers[n]->level);
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if (log->root->log_file)
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log->level = MPMAX(log->level, MSGL_V);
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if (log->root->stats_file)
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log->level = MPMAX(log->level, MSGL_STATS);
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atomic_store(&log->reload_counter, atomic_load(&log->root->reload_counter));
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pthread_mutex_unlock(&mp_msg_lock);
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}
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// Return whether the message at this verbosity level would be actually printed.
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// Thread-safety: see mp_msg().
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bool mp_msg_test(struct mp_log *log, int lev)
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{
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struct mp_log_root *root = log->root;
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if (!root || root->mute)
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return false;
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if (atomic_load(&log->reload_counter) != atomic_load(&root->reload_counter))
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update_loglevel(log);
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return lev <= log->level;
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}
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// Reposition cursor and clear lines for outputting the status line. In certain
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// cases, like term OSD and subtitle display, the status can consist of
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// multiple lines.
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static void prepare_status_line(struct mp_log_root *root, char *new_status)
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{
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FILE *f = stderr;
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size_t new_lines = 1;
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char *tmp = new_status;
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while (1) {
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tmp = strchr(tmp, '\n');
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if (!tmp)
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break;
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new_lines++;
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tmp++;
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}
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size_t old_lines = root->status_lines;
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if (!new_status[0] && old_lines == 0)
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return; // nothing to clear
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size_t clear_lines = MPMIN(MPMAX(new_lines, old_lines), root->blank_lines);
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// clear the status line itself
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fprintf(f, "\r\033[K");
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// and clear all previous old lines
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for (size_t n = 1; n < clear_lines; n++)
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fprintf(f, "\033[A\r\033[K");
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// skip "unused" blank lines, so that status is aligned to term bottom
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for (size_t n = new_lines; n < clear_lines; n++)
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fprintf(f, "\n");
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root->status_lines = new_lines;
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root->blank_lines = MPMAX(root->blank_lines, new_lines);
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}
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static void flush_status_line(struct mp_log_root *root)
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{
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// If there was a status line, don't overwrite it, but skip it.
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if (root->status_lines)
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fprintf(stderr, "\n");
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root->status_lines = 0;
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root->blank_lines = 0;
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}
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void mp_msg_flush_status_line(struct mp_log *log)
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{
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pthread_mutex_lock(&mp_msg_lock);
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if (log->root)
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flush_status_line(log->root);
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pthread_mutex_unlock(&mp_msg_lock);
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}
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bool mp_msg_has_status_line(struct mpv_global *global)
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{
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pthread_mutex_lock(&mp_msg_lock);
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bool r = global->log->root->status_lines > 0;
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pthread_mutex_unlock(&mp_msg_lock);
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return r;
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}
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static void set_term_color(FILE *stream, int c)
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{
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if (c == -1) {
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fprintf(stream, "\033[0m");
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} else {
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fprintf(stream, "\033[%d;3%dm", c >> 3, c & 7);
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}
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}
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static void set_msg_color(FILE* stream, int lev)
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{
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static const int v_colors[] = {9, 1, 3, -1, -1, 2, 8, 8, 8, -1};
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set_term_color(stream, v_colors[lev]);
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}
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static void pretty_print_module(FILE* stream, const char *prefix, bool use_color, int lev)
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{
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// Use random color based on the name of the module
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if (use_color) {
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size_t prefix_len = strlen(prefix);
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unsigned int mod = 0;
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for (int i = 0; i < prefix_len; ++i)
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mod = mod * 33 + prefix[i];
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set_term_color(stream, (mod + 1) % 15 + 1);
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}
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fprintf(stream, "%10s", prefix);
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if (use_color)
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set_term_color(stream, -1);
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fprintf(stream, ": ");
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if (use_color)
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set_msg_color(stream, lev);
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}
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static bool test_terminal_level(struct mp_log *log, int lev)
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{
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return lev <= log->terminal_level &&
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!(lev == MSGL_STATUS && terminal_in_background());
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}
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static void print_terminal_line(struct mp_log *log, int lev, char *text)
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{
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if (!test_terminal_level(log, lev))
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return;
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struct mp_log_root *root = log->root;
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FILE *stream = (root->force_stderr || lev == MSGL_STATUS) ? stderr : stdout;
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if (lev != MSGL_STATUS)
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flush_status_line(root);
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if (root->color)
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set_msg_color(stream, lev);
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if (root->show_time)
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fprintf(stream, "[%" PRId64 "] ", mp_time_us());
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const char *prefix = log->prefix;
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if ((lev >= MSGL_V) || root->verbose || root->module)
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prefix = log->verbose_prefix;
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if (prefix) {
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if (root->module) {
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pretty_print_module(stream, prefix, root->color, lev);
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} else {
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fprintf(stream, "[%s] ", prefix);
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}
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}
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fprintf(stream, "%s", text);
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if (root->color)
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set_term_color(stream, -1);
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fflush(stream);
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}
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static void write_log_file(struct mp_log *log, int lev, char *text)
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{
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struct mp_log_root *root = log->root;
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if (lev > MSGL_V || !root->log_file)
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return;
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fprintf(root->log_file, "[%8.3f][%c][%s] %s",
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(mp_time_us() - MP_START_TIME) / 1e6,
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mp_log_levels[lev][0],
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log->verbose_prefix, text);
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}
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static void write_msg_to_buffers(struct mp_log *log, int lev, char *text)
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{
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struct mp_log_root *root = log->root;
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for (int n = 0; n < root->num_buffers; n++) {
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struct mp_log_buffer *buffer = root->buffers[n];
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if (lev <= buffer->level && lev != MSGL_STATUS) {
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// Assuming a single writer (serialized by msg lock)
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int avail = mp_ring_available(buffer->ring) / sizeof(void *);
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if (avail < 1)
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continue;
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struct mp_log_buffer_entry *entry = talloc_ptrtype(NULL, entry);
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if (avail > 1) {
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*entry = (struct mp_log_buffer_entry) {
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.prefix = talloc_strdup(entry, log->verbose_prefix),
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.level = lev,
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.text = talloc_strdup(entry, text),
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};
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} else {
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// write overflow message to signal that messages might be lost
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*entry = (struct mp_log_buffer_entry) {
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.prefix = "overflow",
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.level = MSGL_FATAL,
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.text = "log message buffer overflow\n",
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};
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}
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mp_ring_write(buffer->ring, (unsigned char *)&entry, sizeof(entry));
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if (buffer->wakeup_cb)
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buffer->wakeup_cb(buffer->wakeup_cb_ctx);
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}
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}
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}
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static void dump_stats(struct mp_log *log, int lev, char *text)
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{
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struct mp_log_root *root = log->root;
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if (lev == MSGL_STATS && root->stats_file) {
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fprintf(root->stats_file, "%"PRId64" %s #%s\n", mp_time_us(), text,
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log->verbose_prefix);
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}
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}
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void mp_msg_va(struct mp_log *log, int lev, const char *format, va_list va)
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{
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if (!mp_msg_test(log, lev))
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return; // do not display
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pthread_mutex_lock(&mp_msg_lock);
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char tmp[MSGSIZE_MAX];
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bool use_tmp = lev == MSGL_STATUS || lev == MSGL_STATS;
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struct mp_log_root *root = log->root;
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char *text = use_tmp ? tmp : root->buffer;
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int len = use_tmp ? 0 : strlen(text);
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if (vsnprintf(text + len, MSGSIZE_MAX - len, format, va) < 0)
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snprintf(text + len, MSGSIZE_MAX - len, "[fprintf error]\n");
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text[MSGSIZE_MAX - 2] = '\n';
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text[MSGSIZE_MAX - 1] = 0;
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if (lev == MSGL_STATS) {
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dump_stats(log, lev, text);
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} else if (lev == MSGL_STATUS && !test_terminal_level(log, lev)) {
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/* discard */
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} else {
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if (lev == MSGL_STATUS && root->termosd)
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prepare_status_line(root, text);
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// Split away each line. Normally we require full lines; buffer partial
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// lines if they happen.
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while (1) {
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char *end = strchr(text, '\n');
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if (!end)
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break;
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char *next = &end[1];
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char saved = next[0];
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next[0] = '\0';
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print_terminal_line(log, lev, text);
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write_log_file(log, lev, text);
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write_msg_to_buffers(log, lev, text);
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next[0] = saved;
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text = next;
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}
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if (lev == MSGL_STATUS) {
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if (text[0]) {
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len = strlen(text);
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if (len < MSGSIZE_MAX - 1) {
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text[len] = root->termosd ? '\r' : '\n';
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text[len + 1] = '\0';
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}
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print_terminal_line(log, lev, text);
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}
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} else {
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int leftover = strlen(text);
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memmove(root->buffer, text, leftover + 1);
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}
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}
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pthread_mutex_unlock(&mp_msg_lock);
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}
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// Create a new log context, which uses talloc_ctx as talloc parent, and parent
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// as logical parent.
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// The name is the prefix put before the output. It's usually prefixed by the
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// parent's name. If the name starts with "/", the parent's name is not
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// prefixed (except in verbose mode), and if it starts with "!", the name is
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// not printed at all (except in verbose mode).
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// If name is NULL, the parent's name/prefix is used.
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// Thread-safety: fully thread-safe, but keep in mind that talloc is not (so
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// talloc_ctx must be owned by the current thread).
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struct mp_log *mp_log_new(void *talloc_ctx, struct mp_log *parent,
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const char *name)
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{
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assert(parent);
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struct mp_log *log = talloc_zero(talloc_ctx, struct mp_log);
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if (!parent->root)
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return log; // same as null_log
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log->root = parent->root;
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if (name) {
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if (name[0] == '!') {
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name = &name[1];
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} else if (name[0] == '/') {
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name = &name[1];
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log->prefix = talloc_strdup(log, name);
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} else {
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log->prefix = parent->prefix
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? talloc_asprintf(log, "%s/%s", parent->prefix, name)
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: talloc_strdup(log, name);
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}
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log->verbose_prefix = parent->prefix
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? talloc_asprintf(log, "%s/%s", parent->prefix, name)
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: talloc_strdup(log, name);
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if (log->prefix && !log->prefix[0])
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log->prefix = NULL;
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if (!log->verbose_prefix[0])
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log->verbose_prefix = "global";
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} else {
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log->prefix = talloc_strdup(log, parent->prefix);
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log->verbose_prefix = talloc_strdup(log, parent->verbose_prefix);
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}
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return log;
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}
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void mp_msg_init(struct mpv_global *global)
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{
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assert(!global->log);
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struct mp_log_root *root = talloc_zero(NULL, struct mp_log_root);
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*root = (struct mp_log_root){
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.global = global,
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.reload_counter = ATOMIC_VAR_INIT(1),
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};
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struct mp_log dummy = { .root = root };
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struct mp_log *log = mp_log_new(root, &dummy, "");
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global->log = log;
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mp_msg_update_msglevels(global);
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}
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void mp_msg_update_msglevels(struct mpv_global *global)
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{
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struct mp_log_root *root = global->log->root;
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struct MPOpts *opts = global->opts;
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if (!opts)
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return;
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pthread_mutex_lock(&mp_msg_lock);
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root->verbose = opts->verbose;
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root->module = opts->msg_module;
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root->use_terminal = opts->use_terminal;
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root->show_time = opts->msg_time;
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if (root->use_terminal) {
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root->color = opts->msg_color && isatty(STDOUT_FILENO);
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root->termosd = isatty(STDERR_FILENO);
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}
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m_option_type_msglevels.free(&root->msg_levels);
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m_option_type_msglevels.copy(NULL, &root->msg_levels,
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&global->opts->msg_levels);
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if (!root->log_file && opts->log_file && opts->log_file[0])
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root->log_file = fopen(opts->log_file, "wb");
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atomic_fetch_add(&root->reload_counter, 1);
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pthread_mutex_unlock(&mp_msg_lock);
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}
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void mp_msg_mute(struct mpv_global *global, bool mute)
|
|
{
|
|
struct mp_log_root *root = global->log->root;
|
|
|
|
root->mute = mute;
|
|
}
|
|
|
|
void mp_msg_force_stderr(struct mpv_global *global, bool force_stderr)
|
|
{
|
|
struct mp_log_root *root = global->log->root;
|
|
|
|
root->force_stderr = force_stderr;
|
|
}
|
|
|
|
void mp_msg_uninit(struct mpv_global *global)
|
|
{
|
|
struct mp_log_root *root = global->log->root;
|
|
if (root->stats_file)
|
|
fclose(root->stats_file);
|
|
if (root->log_file)
|
|
fclose(root->log_file);
|
|
m_option_type_msglevels.free(&root->msg_levels);
|
|
talloc_free(root);
|
|
global->log = NULL;
|
|
}
|
|
|
|
struct mp_log_buffer *mp_msg_log_buffer_new(struct mpv_global *global,
|
|
int size, int level,
|
|
void (*wakeup_cb)(void *ctx),
|
|
void *wakeup_cb_ctx)
|
|
{
|
|
struct mp_log_root *root = global->log->root;
|
|
|
|
#if !HAVE_ATOMICS
|
|
return NULL;
|
|
#endif
|
|
|
|
pthread_mutex_lock(&mp_msg_lock);
|
|
|
|
struct mp_log_buffer *buffer = talloc_ptrtype(NULL, buffer);
|
|
*buffer = (struct mp_log_buffer) {
|
|
.root = root,
|
|
.level = level,
|
|
.ring = mp_ring_new(buffer, sizeof(void *) * size),
|
|
.wakeup_cb = wakeup_cb,
|
|
.wakeup_cb_ctx = wakeup_cb_ctx,
|
|
};
|
|
if (!buffer->ring)
|
|
abort();
|
|
|
|
MP_TARRAY_APPEND(root, root->buffers, root->num_buffers, buffer);
|
|
|
|
atomic_fetch_add(&root->reload_counter, 1);
|
|
pthread_mutex_unlock(&mp_msg_lock);
|
|
|
|
return buffer;
|
|
}
|
|
|
|
void mp_msg_log_buffer_destroy(struct mp_log_buffer *buffer)
|
|
{
|
|
if (!buffer)
|
|
return;
|
|
|
|
pthread_mutex_lock(&mp_msg_lock);
|
|
|
|
struct mp_log_root *root = buffer->root;
|
|
for (int n = 0; n < root->num_buffers; n++) {
|
|
if (root->buffers[n] == buffer) {
|
|
MP_TARRAY_REMOVE_AT(root->buffers, root->num_buffers, n);
|
|
goto found;
|
|
}
|
|
}
|
|
|
|
abort();
|
|
|
|
found:
|
|
|
|
while (1) {
|
|
struct mp_log_buffer_entry *e = mp_msg_log_buffer_read(buffer);
|
|
if (!e)
|
|
break;
|
|
talloc_free(e);
|
|
}
|
|
talloc_free(buffer);
|
|
|
|
atomic_fetch_add(&root->reload_counter, 1);
|
|
pthread_mutex_unlock(&mp_msg_lock);
|
|
}
|
|
|
|
// Return a queued message, or if the buffer is empty, NULL.
|
|
// Thread-safety: one buffer can be read by a single thread only.
|
|
struct mp_log_buffer_entry *mp_msg_log_buffer_read(struct mp_log_buffer *buffer)
|
|
{
|
|
void *ptr = NULL;
|
|
int read = mp_ring_read(buffer->ring, (unsigned char *)&ptr, sizeof(ptr));
|
|
if (read == 0)
|
|
return NULL;
|
|
if (read != sizeof(ptr))
|
|
abort();
|
|
return ptr;
|
|
}
|
|
|
|
int mp_msg_open_stats_file(struct mpv_global *global, const char *path)
|
|
{
|
|
struct mp_log_root *root = global->log->root;
|
|
int r;
|
|
|
|
pthread_mutex_lock(&mp_msg_lock);
|
|
|
|
if (root->stats_file)
|
|
fclose(root->stats_file);
|
|
root->stats_file = fopen(path, "wb");
|
|
r = root->stats_file ? 0 : -1;
|
|
|
|
pthread_mutex_unlock(&mp_msg_lock);
|
|
|
|
mp_msg_update_msglevels(global);
|
|
return r;
|
|
}
|
|
|
|
// Thread-safety: fully thread-safe, but keep in mind that the lifetime of
|
|
// log must be guaranteed during the call.
|
|
// Never call this from signal handlers.
|
|
void mp_msg(struct mp_log *log, int lev, const char *format, ...)
|
|
{
|
|
va_list va;
|
|
va_start(va, format);
|
|
mp_msg_va(log, lev, format, va);
|
|
va_end(va);
|
|
}
|
|
|
|
const char *const mp_log_levels[MSGL_MAX + 1] = {
|
|
[MSGL_FATAL] = "fatal",
|
|
[MSGL_ERR] = "error",
|
|
[MSGL_WARN] = "warn",
|
|
[MSGL_INFO] = "info",
|
|
[MSGL_STATUS] = "status",
|
|
[MSGL_V] = "v",
|
|
[MSGL_DEBUG] = "debug",
|
|
[MSGL_TRACE] = "trace",
|
|
[MSGL_STATS] = "stats",
|
|
};
|
|
|
|
const int mp_mpv_log_levels[MSGL_MAX + 1] = {
|
|
[MSGL_FATAL] = MPV_LOG_LEVEL_FATAL,
|
|
[MSGL_ERR] = MPV_LOG_LEVEL_ERROR,
|
|
[MSGL_WARN] = MPV_LOG_LEVEL_WARN,
|
|
[MSGL_INFO] = MPV_LOG_LEVEL_INFO,
|
|
[MSGL_STATUS] = 0, // never used
|
|
[MSGL_V] = MPV_LOG_LEVEL_V,
|
|
[MSGL_DEBUG] = MPV_LOG_LEVEL_DEBUG,
|
|
[MSGL_TRACE] = MPV_LOG_LEVEL_TRACE,
|
|
[MSGL_STATS] = 0, // never used
|
|
};
|
|
|
|
int mp_msg_find_level(const char *s)
|
|
{
|
|
for (int n = 0; n < MP_ARRAY_SIZE(mp_log_levels); n++) {
|
|
if (mp_log_levels[n] && mp_log_levels[n] && !strcmp(s, mp_log_levels[n]))
|
|
return n;
|
|
}
|
|
return -1;
|
|
}
|