Move av_log() & friends to libavutil

Originally committed as revision 5781 to svn://svn.ffmpeg.org/ffmpeg/trunk

4 files changed, 113 insertions, 0 deletions

diff --git a/libavutil/Makefile b/libavutil/Makefile
index 0d9f1f4778..dfcc6eab9f 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -14,6 +14,7 @@ OBJS= mathematics.o \
       md5.o \
       lls.o \
       adler32.o \
+      log.o
 
 HEADERS = avutil.h common.h mathematics.h integer.h rational.h \
           intfloat_readwrite.h md5.h adler32.h
diff --git a/libavutil/avutil.h b/libavutil/avutil.h
index b2b6d75bec..6f66fbb079 100644
--- a/libavutil/avutil.h
+++ b/libavutil/avutil.h
@@ -26,6 +26,7 @@ extern "C" {
 #include "rational.h"
 #include "integer.h"
 #include "intfloat_readwrite.h"
+#include "log.h"
 
 /**
  * Pixel format. Notes:
diff --git a/libavutil/log.c b/libavutil/log.c
new file mode 100644
index 0000000000..7786ea211d
--- /dev/null
+++ b/libavutil/log.c
@@ -0,0 +1,74 @@
+/*
+ * log functions
+ * Copyright (c) 2003 Michel Bardiaux
+ *
+ * This library 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 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file log.c
+ * log.
+ */
+
+#include "avutil.h"
+
+static int av_log_level = AV_LOG_INFO;
+
+static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
+{
+    static int print_prefix=1;
+    AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
+    if(level>av_log_level)
+        return;
+#undef fprintf
+    if(print_prefix && avc) {
+            fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
+    }
+#define fprintf please_use_av_log
+
+    print_prefix= strstr(fmt, "\n") != NULL;
+
+    vfprintf(stderr, fmt, vl);
+}
+
+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, ...)
+{
+    va_list vl;
+    va_start(vl, fmt);
+    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_callback(void (*callback)(void*, int, const char*, va_list))
+{
+    av_log_callback = callback;
+}
diff --git a/libavutil/log.h b/libavutil/log.h
new file mode 100644
index 0000000000..6c2dba009d
--- /dev/null
+++ b/libavutil/log.h
@@ -0,0 +1,37 @@
+#ifndef LOG_H
+#define LOG_H
+
+#include <stdarg.h>
+
+/**
+ * Used by av_log
+ */
+typedef struct AVCLASS AVClass;
+struct AVCLASS {
+    const char* class_name;
+    const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
+                                        or AVFormatContext, which begin with an AVClass.
+                                        Needed because av_log is in libavcodec and has no visibility
+                                        of AVIn/OutputFormat */
+    struct AVOption *option;
+};
+
+/* av_log API */
+
+#define AV_LOG_QUIET -1
+#define AV_LOG_ERROR 0
+#define AV_LOG_INFO 1
+#define AV_LOG_DEBUG 2
+
+#ifdef __GNUC__
+extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
+#else
+extern void av_log(void*, int level, const char *fmt, ...);
+#endif
+
+extern void av_vlog(void*, int level, const char *fmt, va_list);
+extern int av_log_get_level(void);
+extern void av_log_set_level(int);
+extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
+
+#endif /* LOG_H */