avformat: Factorize codec probing.

libavformat/utils.c

@@ -612,6 +612,30 @@ fail:
 
 /*******************************************************/
 
+static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
+{
+    if(st->codec->codec_id == CODEC_ID_PROBE){
+        AVProbeData *pd = &st->probe_data;
+        av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
+        --st->probe_packets;
+
+        pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
+        memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
+        pd->buf_size += pkt->size;
+        memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
+
+        if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
+            //FIXME we do not reduce score to 0 for the case of running out of buffer space in bytes
+            set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
+            if(st->codec->codec_id != CODEC_ID_PROBE){
+                pd->buf_size=0;
+                av_freep(&pd->buf);
+                av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
+            }
+        }
+    }
+}
+
 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
     int ret, i;
@@ -675,26 +699,7 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
         add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
         s->raw_packet_buffer_remaining_size -= pkt->size;
 
-        if(st->codec->codec_id == CODEC_ID_PROBE){
-            AVProbeData *pd = &st->probe_data;
-            av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
-            --st->probe_packets;
-
-            pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
-            memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
-            pd->buf_size += pkt->size;
-            memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
-
-            if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
-                //FIXME we do not reduce score to 0 for the case of running out of buffer space in bytes
-                set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
-                if(st->codec->codec_id != CODEC_ID_PROBE){
-                    pd->buf_size=0;
-                    av_freep(&pd->buf);
-                    av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
-                }
-            }
-        }
+        probe_codec(s, st, pkt);
     }
 }