Reorganise SPA tree

Reorganise the SPA includes to make it more extensible later
Simplify the naming of the buffer and meta params

spa/include/spa/support/log.h

@@ -0,0 +1,144 @@
+/* Simple Plugin API
+ * Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __SPA_LOG_H__
+#define __SPA_LOG_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SPA_TYPE__Log		SPA_TYPE_INTERFACE_BASE "Log"
+#define SPA_TYPE_LOG_BASE	SPA_TYPE__Log ":"
+
+#include <stdarg.h>
+
+#include <spa/utils/defs.h>
+
+enum spa_log_level {
+	SPA_LOG_LEVEL_NONE = 0,
+	SPA_LOG_LEVEL_ERROR,
+	SPA_LOG_LEVEL_WARN,
+	SPA_LOG_LEVEL_INFO,
+	SPA_LOG_LEVEL_DEBUG,
+	SPA_LOG_LEVEL_TRACE,
+};
+
+/**
+ * struct spa_log:
+ *
+ * The Log interface
+ */
+struct spa_log {
+	/* the version of this log. This can be used to expand this
+	 * structure in the future */
+#define SPA_VERSION_LOG	0
+	uint32_t version;
+	/**
+	 * struct spa_log::info
+	 *
+	 * Extra information about the log
+	 */
+	const struct spa_dict *info;
+
+	/**
+	 * struct spa_log::level
+	 *
+	 * Logging level, everything above this level is not logged
+	 */
+	enum spa_log_level level;
+
+	/**
+	 * struct spa_log::log
+	 * @log: a #struct spa_log
+	 * @level: a #enum spa_log_level
+	 * @file: the file name
+	 * @line: the line number
+	 * @func: the function name
+	 * @fmt: printf style format
+	 * @...: format arguments
+	 *
+	 * Log a message with the given log level.
+	 */
+	void (*log) (struct spa_log *log,
+		     enum spa_log_level level,
+		     const char *file,
+		     int line,
+		     const char *func,
+		     const char *fmt, ...) SPA_PRINTF_FUNC(6, 7);
+
+	/**
+	 * struct spa_log::logv
+	 * @log: a #struct spa_log
+	 * @level: a #enum spa_log_level
+	 * @file: the file name
+	 * @line: the line number
+	 * @func: the function name
+	 * @fmt: printf style format
+	 * @args: format arguments
+	 *
+	 * Log a message with the given log level.
+	 */
+	void (*logv) (struct spa_log *log,
+		      enum spa_log_level level,
+		      const char *file,
+		      int line,
+		      const char *func,
+		      const char *fmt,
+		      va_list args) SPA_PRINTF_FUNC(6, 0);
+};
+
+#define spa_log_level_enabled(l,lev) ((l) && (l)->level >= (lev))
+
+#if __STDC_VERSION__ >= 199901L
+
+#define spa_log_log(l,lev,...)					\
+	if (SPA_UNLIKELY (spa_log_level_enabled (l, lev)))	\
+		(l)->log((l),lev,__VA_ARGS__)
+
+#define spa_log_error(l,...)	spa_log_log(l,SPA_LOG_LEVEL_ERROR,__FILE__,__LINE__,__func__,__VA_ARGS__)
+#define spa_log_warn(l,...)	spa_log_log(l,SPA_LOG_LEVEL_WARN,__FILE__,__LINE__,__func__,__VA_ARGS__)
+#define spa_log_info(l,...)	spa_log_log(l,SPA_LOG_LEVEL_INFO,__FILE__,__LINE__,__func__,__VA_ARGS__)
+#define spa_log_debug(l,...)	spa_log_log(l,SPA_LOG_LEVEL_DEBUG,__FILE__,__LINE__,__func__,__VA_ARGS__)
+#define spa_log_trace(l,...)	spa_log_log(l,SPA_LOG_LEVEL_TRACE,__FILE__,__LINE__,__func__,__VA_ARGS__)
+
+#else
+
+#define SPA_LOG_FUNC(name,lev)							\
+static inline void spa_log_##name (struct spa_log *l, const char *format, ...)	\
+{										\
+	if (SPA_UNLIKELY (spa_log_level_enabled (l, lev))) {			\
+		va_list varargs;						\
+		va_start (varargs, format);					\
+		(l)->logv((l),lev,__FILE__,__LINE__,__func__,format,varargs);	\
+		va_end (varargs);						\
+	}									\
+}
+
+SPA_LOG_FUNC(error, SPA_LOG_LEVEL_ERROR)
+SPA_LOG_FUNC(warn, SPA_LOG_LEVEL_WARN)
+SPA_LOG_FUNC(info, SPA_LOG_LEVEL_INFO)
+SPA_LOG_FUNC(debug, SPA_LOG_LEVEL_DEBUG)
+SPA_LOG_FUNC(trace, SPA_LOG_LEVEL_TRACE)
+
+#endif
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+#endif /* __SPA_LOG_H__ */