[FFmpeg-devel] [PATCH v7 1/2] libavutil/log: Add capability to prefix loglines with current time or current date+time

[Soft Works]

Signed-off-by: softworkz <softworkz at hotmail.com>
---
 doc/APIchanges      |  3 +++
 libavutil/log.c     | 33 +++++++++++++++++++++++++++++----
 libavutil/log.h     | 10 ++++++++++
 libavutil/version.h |  2 +-
 4 files changed, 43 insertions(+), 5 deletions(-)

diff --git a/doc/APIchanges b/doc/APIchanges
index 6eefc7fc33..e64f34d677 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -14,6 +14,9 @@ libavutil:     2021-04-27
 
 API changes, most recent first:
 
+2021-08-09 - xxxxxxxxxx - lavu 57.4.100 - log.h
+  Add new logging flags: AV_LOG_PRINT_TIME and AV_LOG_PRINT_DATETIME
+
 2021-08-02 - xxxxxxxxxx - lavc 59.4.100 - packet.h
   Add AVPacket.opaque, AVPacket.opaque_ref, AVPacket.time_base.
 
diff --git a/libavutil/log.c b/libavutil/log.c
index 66defa9c42..36dd5759ae 100644
--- a/libavutil/log.c
+++ b/libavutil/log.c
@@ -40,6 +40,8 @@
 #include "internal.h"
 #include "log.h"
 #include "thread.h"
+#include "time.h"
+#include "time_internal.h"
 
 static AVMutex mutex = AV_MUTEX_INITIALIZER;
 
@@ -289,14 +291,31 @@ static const char *get_level_str(int level)
     }
 }
 
+static void format_date_now(AVBPrint *timeBuf, int include_date)
+{
+    struct tm *ptm, tmbuf;
+    const int64_t time_ms = av_gettime() / 1000;
+    const time_t time_s = time_ms / 1000;
+    const int millisec = time_ms % 1000;
+    ptm = localtime_r(&time_s, &tmbuf);
+    if (ptm) {
+        if (include_date)
+            av_bprint_strftime(timeBuf, "%Y-%m-%d ", ptm);
+
+        av_bprint_strftime(timeBuf, "%H:%M:%S", ptm);
+        av_bprintf(timeBuf, ".%03d ", millisec);
+    }
+}
+
 static void format_line(void *avcl, int level, const char *fmt, va_list vl,
-                        AVBPrint part[4], int *print_prefix, int type[2])
+                        AVBPrint part[5], int *print_prefix, int type[2])
 {
-    AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
+    AVClass *avc = avcl ? *(AVClass **) avcl : NULL;
     av_bprint_init(part+0, 0, AV_BPRINT_SIZE_AUTOMATIC);
     av_bprint_init(part+1, 0, AV_BPRINT_SIZE_AUTOMATIC);
     av_bprint_init(part+2, 0, AV_BPRINT_SIZE_AUTOMATIC);
     av_bprint_init(part+3, 0, 65536);
+    av_bprint_init(part+4, 0, AV_BPRINT_SIZE_AUTOMATIC);
 
     if(type) type[0] = type[1] = AV_CLASS_CATEGORY_NA + 16;
     if (*print_prefix && avc) {
@@ -314,6 +333,10 @@ static void format_line(void *avcl, int level, const char *fmt, va_list vl,
         if(type) type[1] = get_category(avcl);
     }
 
+    if (*print_prefix
+        && (flags & (AV_LOG_PRINT_TIME | AV_LOG_PRINT_DATETIME)))
+        format_date_now(&part[4], flags & AV_LOG_PRINT_DATETIME);
+
     if (*print_prefix && (level > AV_LOG_QUIET) && (flags & AV_LOG_PRINT_LEVEL))
         av_bprintf(part+2, "[%s] ", get_level_str(level));
 
@@ -334,7 +357,7 @@ void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
 int av_log_format_line2(void *ptr, int level, const char *fmt, va_list vl,
                         char *line, int line_size, int *print_prefix)
 {
-    AVBPrint part[4];
+    AVBPrint part[5];
     int ret;
 
     format_line(ptr, level, fmt, vl, part, print_prefix, NULL);
@@ -348,7 +371,7 @@ void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
     static int print_prefix = 1;
     static int count;
     static char prev[LINE_SZ];
-    AVBPrint part[4];
+    AVBPrint part[5];
     char line[LINE_SZ];
     static int is_atty;
     int type[2];
@@ -383,6 +406,8 @@ void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
         count = 0;
     }
     strcpy(prev, line);
+
+    colored_fputs(7, 0, part[4].str);
     sanitize(part[0].str);
     colored_fputs(type[0], 0, part[0].str);
     sanitize(part[1].str);
diff --git a/libavutil/log.h b/libavutil/log.h
index 8727c38afc..b071f0f1eb 100644
--- a/libavutil/log.h
+++ b/libavutil/log.h
@@ -377,6 +377,16 @@ int av_log_format_line2(void *ptr, int level, const char *fmt, va_list vl,
  */
 #define AV_LOG_PRINT_LEVEL 2
 
+/**
+ * Include local time in log output.
+ */
+#define AV_LOG_PRINT_TIME 4
+
+/**
+ * Include local date and time in log output.
+ */
+#define AV_LOG_PRINT_DATETIME 8
+
 void av_log_set_flags(int arg);
 int av_log_get_flags(void);
 
diff --git a/libavutil/version.h b/libavutil/version.h
index 6b4a265457..201b012596 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -79,7 +79,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  57
-#define LIBAVUTIL_VERSION_MINOR   3
+#define LIBAVUTIL_VERSION_MINOR   4
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
-- 
2.28.0.windows.1