Don't use gf_update by default for 1-pass CBR.

Change-Id: I5df6abceb0a2a69706feadeb820b593cae88f573

vp9/encoder/vp9_firstpass.c

@@ -2024,6 +2024,22 @@ void vp9_get_one_pass_params(VP9_COMP *cpi) {
   }
 }
 
+void vp9_get_one_pass_cbr_params(VP9_COMP *cpi) {
+  VP9_COMMON *const cm = &cpi->common;
+  if ((cm->current_video_frame == 0 ||
+      cm->frame_flags & FRAMEFLAGS_KEY ||
+      cpi->rc.frames_to_key == 0 ||
+      (cpi->oxcf.auto_key && test_for_kf_one_pass(cpi)))) {
+    cm->frame_type = KEY_FRAME;
+    cpi->rc.frames_to_key = cpi->key_frame_frequency;
+  } else {
+    cm->frame_type = INTER_FRAME;
+  }
+  // Don't use gf_update by default in CBR mode.
+  cpi->rc.frames_till_gf_update_due = INT_MAX;
+  cpi->rc.baseline_gf_interval = INT_MAX;
+}
+
 void vp9_get_first_pass_params(VP9_COMP *cpi) {
   VP9_COMMON *const cm = &cpi->common;
   if (!cpi->refresh_alt_ref_frame &&

vp9/encoder/vp9_firstpass.h

@@ -22,6 +22,7 @@ void vp9_end_second_pass(VP9_COMP *cpi);
 
 void vp9_get_first_pass_params(VP9_COMP *cpi);
 void vp9_get_one_pass_params(VP9_COMP *cpi);
+void vp9_get_one_pass_cbr_params(VP9_COMP *cpi);
 void vp9_get_svc_params(VP9_COMP *cpi);
 
 #endif  // VP9_ENCODER_VP9_FIRSTPASS_H_

vp9/encoder/vp9_onyx_if.c

@@ -3313,7 +3313,11 @@ static void SvcEncode(VP9_COMP *cpi, size_t *size, uint8_t *dest,
 
 static void Pass0Encode(VP9_COMP *cpi, size_t *size, uint8_t *dest,
                         unsigned int *frame_flags) {
-  vp9_get_one_pass_params(cpi);
+  if (cpi->oxcf.end_usage == USAGE_STREAM_FROM_SERVER) {
+    vp9_get_one_pass_cbr_params(cpi);
+  } else {
+    vp9_get_one_pass_params(cpi);
+  }
   encode_frame_to_data_rate(cpi, size, dest, frame_flags);
 }