log: color prefixes according to their source.

The use of cyan is droped from the levels to avoid confusion
magenta/cyan/blue is used for muxer/codec/filter layer
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/log.c

@@ -41,7 +41,16 @@ static const uint8_t color[16 + AV_CLASS_CATEGORY_NB] = {
     [AV_LOG_WARNING/8] = 14,
     [AV_LOG_INFO   /8] =  7,
     [AV_LOG_VERBOSE/8] = 10,
-    [AV_LOG_DEBUG  /8] = 11,
+    [AV_LOG_DEBUG  /8] = 10,
+    [16+AV_CLASS_CATEGORY_NA              ] =  7,
+    [16+AV_CLASS_CATEGORY_INPUT           ] =  3,
+    [16+AV_CLASS_CATEGORY_OUTPUT          ] = 11,
+    [16+AV_CLASS_CATEGORY_MUXER           ] =  3,
+    [16+AV_CLASS_CATEGORY_DEMUXER         ] = 11,
+    [16+AV_CLASS_CATEGORY_ENCODER         ] =  5,
+    [16+AV_CLASS_CATEGORY_DECODER         ] = 13,
+    [16+AV_CLASS_CATEGORY_FILTER          ] =  1,
+    [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] =  9,
 };
 
 static int16_t background, attr_orig;
@@ -57,7 +66,16 @@ static const uint8_t color[16 + AV_CLASS_CATEGORY_NB] = {
     [AV_LOG_WARNING/8] = 0x03,
     [AV_LOG_INFO   /8] =    9,
     [AV_LOG_VERBOSE/8] = 0x02,
-    [AV_LOG_DEBUG  /8] = 0x06,
+    [AV_LOG_DEBUG  /8] = 0x02,
+    [16+AV_CLASS_CATEGORY_NA              ] =    9,
+    [16+AV_CLASS_CATEGORY_INPUT           ] = 0x06,
+    [16+AV_CLASS_CATEGORY_OUTPUT          ] = 0x16,
+    [16+AV_CLASS_CATEGORY_MUXER           ] = 0x06,
+    [16+AV_CLASS_CATEGORY_DEMUXER         ] = 0x16,
+    [16+AV_CLASS_CATEGORY_ENCODER         ] = 0x05,
+    [16+AV_CLASS_CATEGORY_DECODER         ] = 0x15,
+    [16+AV_CLASS_CATEGORY_FILTER          ] = 0x04,
+    [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 0x14,
 };
 
 #define set_color(x)  fprintf(stderr, "\033[%d;3%dm", color[x] >> 4, color[x]&15)
@@ -111,27 +129,47 @@ static void sanitize(uint8_t *line){
     }
 }
 
-void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
-                        char *line, int line_size, int *print_prefix)
+static int get_category(AVClass *avc){
+    if(    !avc
+        || (avc->version&0xFF)<100
+        ||  avc->version < (51 << 16 | 56 << 8)
+        ||  avc->category >= AV_CLASS_CATEGORY_NB) return AV_CLASS_CATEGORY_NA + 16;
+
+    return avc->category + 16;
+}
+
+static void format_line(void *ptr, int level, const char *fmt, va_list vl,
+                        char part[3][512], int part_size, int *print_prefix, int type[2])
 {
     AVClass* avc = ptr ? *(AVClass **) ptr : NULL;
-    line[0] = 0;
+    part[0][0] = part[1][0] = part[2][0] = 0;
+    if(type) type[0] = type[1] = AV_CLASS_CATEGORY_NA + 16;
     if (*print_prefix && avc) {
         if (avc->parent_log_context_offset) {
             AVClass** parent = *(AVClass ***) (((uint8_t *) ptr) +
                                    avc->parent_log_context_offset);
             if (parent && *parent) {
-                snprintf(line, line_size, "[%s @ %p] ",
+                snprintf(part[0], part_size, "[%s @ %p] ",
                          (*parent)->item_name(parent), parent);
+                if(type) type[0] = get_category(*parent);
             }
         }
-        snprintf(line + strlen(line), line_size - strlen(line), "[%s @ %p] ",
+        snprintf(part[1], part_size, "[%s @ %p] ",
                  avc->item_name(ptr), ptr);
+        if(type) type[1] = get_category(avc);
     }
 
-    vsnprintf(line + strlen(line), line_size - strlen(line), fmt, vl);
+    vsnprintf(part[2], part_size, fmt, vl);
 
-    *print_prefix = strlen(line) && line[strlen(line) - 1] == '\n';
+    *print_prefix = strlen(part[2]) && part[2][strlen(part[2]) - 1] == '\n';
+}
+
+void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
+                        char *line, int line_size, int *print_prefix)
+{
+    char part[3][512];
+    format_line(ptr, level, fmt, vl, part, sizeof(part[0]), print_prefix, NULL);
+    snprintf(line, line_size, "%s%s%s", part[0], part[1], part[2]);
 }
 
 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
@@ -139,12 +177,15 @@ 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[1024];
+    char part[3][512];
     char line[1024];
     static int is_atty;
+    int type[2];
 
     if (level > av_log_level)
         return;
-    av_log_format_line(ptr, level, fmt, vl, line, sizeof(line), &print_prefix);
+    format_line(ptr, level, fmt, vl, part, sizeof(part[0]), &print_prefix, type);
+    snprintf(line, sizeof(line), "%s%s%s", part[0], part[1], part[2]);
 
 #if HAVE_ISATTY
     if (!is_atty)
@@ -163,8 +204,12 @@ void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
         count = 0;
     }
     strcpy(prev, line);
-    sanitize(line);
-    colored_fputs(av_clip(level >> 3, 0, 6), line);
+    sanitize(part[0]);
+    colored_fputs(type[0], part[0]);
+    sanitize(part[1]);
+    colored_fputs(type[1], part[1]);
+    sanitize(part[2]);
+    colored_fputs(av_clip(level >> 3, 0, 6), part[2]);
 }
 
 static void (*av_log_callback)(void*, int, const char*, va_list) =