avformat/utils: move is_intra_only() to header and rename to ff_is_intra_only()

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>

libavformat/internal.h

@@ -510,6 +510,8 @@ unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
 
 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
 
+int ff_is_intra_only(enum AVCodecID id);
+
 /**
  * Select a PCM codec based on the given parameters.
  *

libavformat/utils.c

@@ -1011,7 +1011,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
     }
 }
 
-static int is_intra_only(enum AVCodecID id)
+int ff_is_intra_only(enum AVCodecID id)
 {
     const AVCodecDescriptor *d = avcodec_descriptor_get(id);
     if (!d)
@@ -1410,7 +1410,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
             presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), st->index, st->id);
 
     /* update flags */
-    if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA || is_intra_only(st->codecpar->codec_id))
+    if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA || ff_is_intra_only(st->codecpar->codec_id))
         pkt->flags |= AV_PKT_FLAG_KEY;
 #if FF_API_CONVERGENCE_DURATION
 FF_DISABLE_DEPRECATION_WARNINGS