shithub: libvpx

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rc: turn off gf constrain for external RC

Added a new flag in rate control which turns off gf interval constrain
on key frame frequency for external RC.

It remains on for libvpx.

Change-Id: I18bb0d8247a421193f023619f906d0362b873b31

--- a/test/ratectrl_rtc_test.cc

+++ b/test/ratectrl_rtc_test.cc

@@ -61,6 +61,7 @@

 //  - Set rc_end_usage to VPX_VBR

 //  - AQ Mode 0

 //  - Disable vp9_compute_frame_low_motion in vp9_encoder.c

+//  - Set rc->constrain_gf_key_freq_onepass_vbr = 0 in vp9_rc_init

 // examples/vpx_temporal_svc_encoder gipsrec_motion1.1280_720.yuv out vp9

 //    1280 720 1 30 7 0 0 1 0 1000

 //

@@ -192,8 +193,7 @@

     for (size_t i = 0; i < kNumFrame; i++) {

       one_layer_file >> frame_info;

       if (frame_info.frame_id > 0) frame_params.frame_type = INTER_FRAME;

-      if (frame_info.frame_id % rc_cfg_.key_freq == 0)

-        frame_params.frame_type = KEY_FRAME;

+      if (frame_info.frame_id % 300 == 0) frame_params.frame_type = KEY_FRAME;

       ASSERT_EQ(frame_info.spatial_id, 0);

       ASSERT_EQ(frame_info.temporal_id, 0);

       rc_api_->ComputeQP(frame_params);

@@ -229,19 +229,16 @@

   void SetConfigOneLayerCBR() {

     SetConfig();

     rc_cfg_.rc_mode = VPX_CBR;

-    rc_cfg_.key_freq = 3000;

   }

   void SetConfigOneLayerVBR() {

     SetConfig();

     rc_cfg_.rc_mode = VPX_VBR;

-    rc_cfg_.key_freq = 3000;

   }

   void SetConfigOneLayerVBRPeriodicKey() {

     SetConfig();

     rc_cfg_.rc_mode = VPX_VBR;

-    rc_cfg_.key_freq = 300;

   }

   void SetConfigSVC() {

--- a/vp9/encoder/vp9_ratectrl.c

+++ b/vp9/encoder/vp9_ratectrl.c

@@ -407,6 +407,7 @@

   rc->source_alt_ref_active = 0;

   rc->frames_till_gf_update_due = 0;

+  rc->constrain_gf_key_freq_onepass_vbr = 1;

   rc->ni_av_qi = oxcf->worst_allowed_q;

   rc->ni_tot_qi = 0;

   rc->ni_frames = 0;

@@ -2083,7 +2084,8 @@

         rc->gfu_boost = DEFAULT_GF_BOOST >> 1;

       rc->af_ratio_onepass_vbr = VPXMIN(15, VPXMAX(5, 3 * rc->gfu_boost / 400));

     }

-    adjust_gfint_frame_constraint(cpi, rc->frames_to_key);

+    if (rc->constrain_gf_key_freq_onepass_vbr)

+      adjust_gfint_frame_constraint(cpi, rc->frames_to_key);

     rc->frames_till_gf_update_due = rc->baseline_gf_interval;

     cpi->refresh_golden_frame = 1;

     rc->source_alt_ref_pending = 0;

--- a/vp9/encoder/vp9_ratectrl.h

+++ b/vp9/encoder/vp9_ratectrl.h

@@ -207,6 +207,10 @@

   int preserve_arf_as_gld;

   int preserve_next_arf_as_gld;

   int show_arf_as_gld;

+

+  // Flag to constrain golden frame interval on key frame frequency for 1 pass

+  // VBR.

+  int constrain_gf_key_freq_onepass_vbr;

 } RATE_CONTROL;

 struct VP9_COMP;

--- a/vp9/ratectrl_rtc.cc

+++ b/vp9/ratectrl_rtc.cc

@@ -46,7 +46,6 @@

   oxcf->content = VP9E_CONTENT_DEFAULT;

   oxcf->drop_frames_water_mark = 0;

   cm->current_video_frame = 0;

-  oxcf->key_freq = rc_cfg.key_freq;

   rc->kf_boost = DEFAULT_KF_BOOST;

   UpdateRateControl(rc_cfg);

@@ -60,7 +59,7 @@

   rc->rc_2_frame = 0;

   vp9_rc_init_minq_luts();

   vp9_rc_init(oxcf, 0, rc);

-  rc->frames_to_key = oxcf->key_freq;

+  rc->constrain_gf_key_freq_onepass_vbr = 0;

   cpi_->sf.use_nonrd_pick_mode = 1;

 }

@@ -152,8 +151,7 @@

         target = vp9_calc_pframe_target_size_one_pass_cbr(cpi_);

     } else if (cpi_->oxcf.rc_mode == VPX_VBR) {

       if (cm->frame_type == KEY_FRAME) {

-        cpi_->rc.this_key_frame_forced =

-            cm->current_video_frame != 0 && cpi_->rc.frames_to_key == 0;

+        cpi_->rc.this_key_frame_forced = cm->current_video_frame != 0;

         cpi_->rc.frames_to_key = cpi_->oxcf.key_freq;

       }

       vp9_set_gf_update_one_pass_vbr(cpi_);

--- a/vp9/ratectrl_rtc.h

+++ b/vp9/ratectrl_rtc.h

@@ -51,8 +51,6 @@

   int ts_rate_decimator[VPX_TS_MAX_LAYERS];

   // vbr, cbr

   enum vpx_rc_mode rc_mode;

-  // key frame frequency

-  int key_freq;

 };

 struct VP9FrameParamsQpRTC {