lavc: reimplement avcodec_get_type() using codec descriptors

Signed-off-by: Anton Khirnov <anton@khirnov.net>

libavcodec/codec_desc.c

@@ -2435,3 +2435,9 @@ const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name)
             return desc;
     return NULL;
 }
+
+enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
+{
+    const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
+    return desc ? desc->type : AVMEDIA_TYPE_UNKNOWN;
+}

libavcodec/utils.c

@@ -2320,20 +2320,6 @@ void ff_thread_await_progress(ThreadFrame *f, int progress, int field)
 
 #endif
 
-enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
-{
-    if (codec_id <= AV_CODEC_ID_NONE)
-        return AVMEDIA_TYPE_UNKNOWN;
-    else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
-        return AVMEDIA_TYPE_VIDEO;
-    else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
-        return AVMEDIA_TYPE_AUDIO;
-    else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
-        return AVMEDIA_TYPE_SUBTITLE;
-
-    return AVMEDIA_TYPE_UNKNOWN;
-}
-
 int avcodec_is_open(AVCodecContext *s)
 {
     return !!s->internal;