force lossless coding at very high quality end

Change-Id: I75fc4eee10bee9efd419d248827290cce8e6d637

force lossless coding at very high quality end
Change-Id: I75fc4eee10bee9efd419d248827290cce8e6d637
374a1736 · Yaowu Xu · f4d2ad69 · 374a1736
Commit 374a1736 authored Mar 14, 2013 by Yaowu Xu
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vp9/encoder/vp9_encodeframe.c vp9/encoder/vp9_encodeframe.c +3 -1

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--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -1292,7 +1292,9 @@ static void encode_frame_internal(VP9_COMP *cpi) {
  vp9_zero(cpi->mb_mv_ref_count);
 #endif

-  // force lossless mode when Q0 is selected
+  // force lossless mode
+  if (cm->base_qindex <= 4)
+    cm->base_qindex = 0;
  cpi->mb.e_mbd.lossless = (cm->base_qindex == 0 &&
                            cm->y1dc_delta_q == 0 &&
                            cm->uvdc_delta_q == 0 &&