avcodec/bsf: Beautify log messages from bitstream filters

Up until now, the name of every AVBSFContext for logging purposes was
"AVBSFContext", so that the default logging callback produced output
like "[AVBSFContext @ 0x55813bae92c0] Extradata". This has been changed
to "[trace_headers @ 0x60a000000700] Extradata" by adding an item_name-
function to the AVClass for bitstream filters.

Furthermore, the correct category has been set so that the introductory
part before the actual message (everything before "Extradata" in the
above examples) are displayed in a different colour than the rest.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: James Almer <jamrial@gmail.com>

diff --git a/libavcodec/bsf.c b/libavcodec/bsf.c
index d0e0d46068e73ba76006d8e9f76f90e8a89bdb78..7b96183e64070453b6fb0e0e05d8d352a4788c0b 100644 (file)
--- a/libavcodec/bsf.c
+++ b/libavcodec/bsf.c
@@ -64,12 +64,18 @@ static void *bsf_child_next(void *obj, void *prev)
     return NULL;
 }
 
+static const char *bsf_to_name(void *bsf)
+{
+    return ((AVBSFContext *)bsf)->filter->name;
+}
+
 static const AVClass bsf_class = {
     .class_name       = "AVBSFContext",
-    .item_name        = av_default_item_name,
+    .item_name        = bsf_to_name,
     .version          = LIBAVUTIL_VERSION_INT,
     .child_next       = bsf_child_next,
     .child_class_next = ff_bsf_child_class_next,
+    .category         = AV_CLASS_CATEGORY_BITSTREAM_FILTER,
 };
 
 const AVClass *av_bsf_get_class(void)