avcodec/frame_thread_encoder: restructure huffyuv checks

This makes them similar to the other checks
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/frame_thread_encoder.c

@@ -139,6 +139,15 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
         av_log(avctx, AV_LOG_WARNING,
                "MJPEG CBR encoding works badly with frame multi-threading, consider "
                "using -threads 1, -thread_type slice or a constant quantizer.\n");
+
+    if (avctx->codec_id == AV_CODEC_ID_HUFFYUV ||
+        avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
+        // huffyuv doesnt support these with multiple frame threads currently
+        if (avctx->context_model > 0 || (avctx->flags & CODEC_FLAG_PASS1)) {
+            avctx->thread_count = 1;
+        }
+    }
+
     if(!avctx->thread_count) {
         avctx->thread_count = av_cpu_count();
         avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
@@ -147,13 +156,6 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
     if(avctx->thread_count <= 1)
         return 0;
 
-    if (avctx->codec_id == AV_CODEC_ID_HUFFYUV ||
-        avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
-        // huffyuv doesnt support these with multiple frame threads currently
-        if (avctx->context_model > 0 || (avctx->flags & CODEC_FLAG_PASS1))
-            return 0;
-    }
-
     if(avctx->thread_count > MAX_THREADS)
         return AVERROR(EINVAL);