From: Jerome Jiang <jianj@google.com>
Date: Tue, 18 Feb 2020 18:46:03 +0000 (-0800)
Subject: Cap delta_q_uv to -15..15
X-Git-Tag: v1.9.0-rc1~73^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2d1a7cd45a4ac7b4bc827fcc915ff3edd3009691;p=libvpx

Cap delta_q_uv to -15..15

only 4 bits in bitstream

Change-Id: I338fe54475e094ee5e556467e0b66c982bb560fa
---

diff --git a/vp9/vp9_cx_iface.c b/vp9/vp9_cx_iface.c
index 9ec2cf276..2ca2114ec 100644
--- a/vp9/vp9_cx_iface.c
+++ b/vp9/vp9_cx_iface.c
@@ -1650,7 +1650,7 @@ static vpx_codec_err_t ctrl_set_delta_q_uv(vpx_codec_alg_priv_t *ctx,
                                            va_list args) {
   struct vp9_extracfg extra_cfg = ctx->extra_cfg;
   int data = va_arg(args, int);
-  data = VPXMIN(VPXMAX(data, -20), 20);
+  data = VPXMIN(VPXMAX(data, -15), 15);
   extra_cfg.delta_q_uv = data;
   return update_extra_cfg(ctx, &extra_cfg);
 }
diff --git a/vpx/vp8cx.h b/vpx/vp8cx.h
index d8b769b87..dcdd710c0 100644
--- a/vpx/vp8cx.h
+++ b/vpx/vp8cx.h
@@ -679,7 +679,7 @@ enum vp8e_enc_control_id {
 
   /*!\brief Codec control function to set delta q for uv.
    *
-   * Cap it at +/-20 for now.
+   * Cap it at +/-15.
    *
    * Supported in codecs: VP9
    */