avcodec/h264: support sps/pps AV_PKT_DATA_NEW_EXTRADATA

Commit 601c238854 added support for AV_PKT_DATA_NEW_EXTRADATA, but
only for avcC extradata.
This commit adds support for sps/pps extradata as well. This makes
support consistent for passing new extradata consistent with the
types of extradata that can be passed when initializing the decoder.

Signed-off-by: Oliver Woodman <ollywoodman@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/h264dec.c

@@ -847,7 +847,7 @@ fail:
     return ret;
 }
 
-static int is_extra(const uint8_t *buf, int buf_size)
+static int is_avcc_extradata(const uint8_t *buf, int buf_size)
 {
     int cnt= buf[5]&0x1f;
     const uint8_t *p= buf+6;
@@ -974,16 +974,15 @@ static int h264_decode_frame(AVCodecContext *avctx, void *data,
     if (buf_size == 0)
         return send_next_delayed_frame(h, pict, got_frame, 0);
 
-    if (h->is_avc && av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
+    if (av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
         int side_size;
         uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
-        if (is_extra(side, side_size))
-            ff_h264_decode_extradata(side, side_size,
-                                     &h->ps, &h->is_avc, &h->nal_length_size,
-                                     avctx->err_recognition, avctx);
+        ff_h264_decode_extradata(side, side_size,
+                                 &h->ps, &h->is_avc, &h->nal_length_size,
+                                 avctx->err_recognition, avctx);
     }
     if (h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC) {
-        if (is_extra(buf, buf_size))
+        if (is_avcc_extradata(buf, buf_size))
             return ff_h264_decode_extradata(buf, buf_size,
                                             &h->ps, &h->is_avc, &h->nal_length_size,
                                             avctx->err_recognition, avctx);