1 files changed, 12 insertions, 10 deletions
diff --git a/libswscale/swscale_template.c b/libswscale/swscale_template.c
index b682c11d42..bbd9a1f701 100644
--- a/libswscale/swscale_template.c
+++ b/libswscale/swscale_template.c
@@ -2662,26 +2662,26 @@ static int RENAME(swScale)(SwsContext *c, const uint8_t* src[], int srcStride[],
         assert(firstLumSrcY >= lastInLumBuf - vLumBufSize + 1);
         assert(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1);
 
+        DEBUG_BUFFERS("dstY: %d\n", dstY);
+        DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",
+                         firstLumSrcY,    lastLumSrcY,    lastInLumBuf);
+        DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",
+                         firstChrSrcY,    lastChrSrcY,    lastInChrBuf);
+
         // Do we have enough lines in this slice to output the dstY line
         enough_lines = lastLumSrcY < srcSliceY + srcSliceH && lastChrSrcY < -((-srcSliceY - srcSliceH)>>c->chrSrcVSubSample);
         if (!enough_lines) {
             lastLumSrcY = srcSliceY + srcSliceH - 1;
             lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;
+            DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n",
+                                            lastLumSrcY, lastChrSrcY);
         }
 
-        DEBUG_BUFFERS("dstY: %d\n", dstY);
-        DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",
-                         firstLumSrcY,    lastLumSrcY,    lastInLumBuf);
-        DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",
-                         firstChrSrcY,    lastChrSrcY,    lastInChrBuf);
-
         //Do horizontal scaling
         while(lastInLumBuf < lastLumSrcY) {
             const uint8_t *src1= src[0]+(lastInLumBuf + 1 - srcSliceY)*srcStride[0];
             const uint8_t *src2= src[3]+(lastInLumBuf + 1 - srcSliceY)*srcStride[3];
             lumBufIndex++;
-            DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n",
-                               lumBufIndex,    lastInLumBuf);
             assert(lumBufIndex < 2*vLumBufSize);
             assert(lastInLumBuf + 1 - srcSliceY < srcSliceH);
             assert(lastInLumBuf + 1 - srcSliceY >= 0);
@@ -2695,13 +2695,13 @@ static int RENAME(swScale)(SwsContext *c, const uint8_t* src[], int srcStride[],
                                 formatConvBuffer,
                                 pal, 1);
             lastInLumBuf++;
+            DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n",
+                               lumBufIndex,    lastInLumBuf);
         }
         while(lastInChrBuf < lastChrSrcY) {
             const uint8_t *src1= src[1]+(lastInChrBuf + 1 - chrSrcSliceY)*srcStride[1];
             const uint8_t *src2= src[2]+(lastInChrBuf + 1 - chrSrcSliceY)*srcStride[2];
             chrBufIndex++;
-            DEBUG_BUFFERS("\t\tchrBufIndex %d: lastInChrBuf: %d\n",
-                               chrBufIndex,    lastInChrBuf);
             assert(chrBufIndex < 2*vChrBufSize);
             assert(lastInChrBuf + 1 - chrSrcSliceY < (chrSrcSliceH));
             assert(lastInChrBuf + 1 - chrSrcSliceY >= 0);
@@ -2713,6 +2713,8 @@ static int RENAME(swScale)(SwsContext *c, const uint8_t* src[], int srcStride[],
                                 formatConvBuffer,
                                 pal);
             lastInChrBuf++;
+            DEBUG_BUFFERS("\t\tchrBufIndex %d: lastInChrBuf: %d\n",
+                               chrBufIndex,    lastInChrBuf);
         }
         //wrap buf index around to stay inside the ring buffer
         if (lumBufIndex >= vLumBufSize) lumBufIndex-= vLumBufSize;