1 files changed, 92 insertions, 0 deletions
diff --git a/common/msg.h b/common/msg.h
new file mode 100644
index 0000000..b0cec7b
--- /dev/null
+++ b/common/msg.h
@@ -0,0 +1,92 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv 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.
+ *
+ * mpv 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 mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MPLAYER_MP_MSG_H
+#define MPLAYER_MP_MSG_H
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "osdep/compiler.h"
+
+struct mp_log;
+
+// A mp_log instance that never outputs anything.
+extern struct mp_log *const mp_null_log;
+
+// Verbosity levels.
+enum {
+    MSGL_FATAL,     // only errors (difference to MSGL_ERR isn't too clear)
+    MSGL_ERR,       // only errors
+    MSGL_WARN,      // only warnings
+    MSGL_INFO,      // what you normally see on the terminal
+    MSGL_STATUS,    // exclusively for the playback status line (-quiet disables)
+    MSGL_V,         // -v | slightly more information than default
+    MSGL_DEBUG,     // -v -v | full debug information; this and numerically below
+                    // should not produce "per frame" output
+    MSGL_TRACE,     // -v -v -v | anything that might flood the terminal
+    MSGL_STATS,     // dumping fine grained stats (--dump-stats)
+
+    MSGL_MAX = MSGL_STATS,
+};
+
+struct mp_log *mp_log_new(void *talloc_ctx, struct mp_log *parent,
+                          const char *name);
+
+void mp_msg(struct mp_log *log, int lev, const char *format, ...)
+    PRINTF_ATTRIBUTE(3, 4);
+void mp_msg_va(struct mp_log *log, int lev, const char *format, va_list va);
+
+int mp_msg_level(struct mp_log *log);
+
+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__)
+#define mp_warn(log, ...)       mp_msg(log, MSGL_WARN, __VA_ARGS__)
+#define mp_info(log, ...)       mp_msg(log, MSGL_INFO, __VA_ARGS__)
+#define mp_verbose(log, ...)    mp_msg(log, MSGL_V, __VA_ARGS__)
+#define mp_dbg(log, ...)        mp_msg(log, MSGL_DEBUG, __VA_ARGS__)
+#define mp_trace(log, ...)      mp_msg(log, MSGL_TRACE, __VA_ARGS__)
+
+// Convenience macros, typically called with a pointer to a context struct
+// as first argument, which has a "struct mp_log *log;" member.
+
+#define MP_MSG(obj, lev, ...)   mp_msg((obj)->log, lev, __VA_ARGS__)
+
+#define MP_FATAL(obj, ...)      MP_MSG(obj, MSGL_FATAL, __VA_ARGS__)
+#define MP_ERR(obj, ...)        MP_MSG(obj, MSGL_ERR, __VA_ARGS__)
+#define MP_WARN(obj, ...)       MP_MSG(obj, MSGL_WARN, __VA_ARGS__)
+#define MP_INFO(obj, ...)       MP_MSG(obj, MSGL_INFO, __VA_ARGS__)
+#define MP_VERBOSE(obj, ...)    MP_MSG(obj, MSGL_V, __VA_ARGS__)
+#define MP_DBG(obj, ...)        MP_MSG(obj, MSGL_DEBUG, __VA_ARGS__)
+#define MP_TRACE(obj, ...)      MP_MSG(obj, MSGL_TRACE, __VA_ARGS__)
+
+// This is a bit special. See TOOLS/stats-conv.py what rules text passed
+// to these functions should follow. Also see --dump-stats.
+#define mp_stats(obj, ...)      mp_msg(obj, MSGL_STATS, __VA_ARGS__)
+#define MP_STATS(obj, ...)      MP_MSG(obj, MSGL_STATS, __VA_ARGS__)
+
+#endif /* MPLAYER_MP_MSG_H */