vp9-rtc: Add control to disable maxq on overshoot

Add encoder control to disable feature to increase Q
on overshoot detection, for CBR. Default (no usage
of the control) means the feature is internally enabled.

Add the control to the sample encoders, but keep it
disabled as default (set to 0, so feature is on).

Change-Id: Ia2237bc4aaea9770e5080dab20bfff9e3fd09199

examples/vp9_spatial_svc_encoder.c

@@ -1053,6 +1053,8 @@ int main(int argc, const char **argv) {
 
   vpx_codec_control(&encoder, VP9E_SET_TUNE_CONTENT, app_input.tune_content);
 
+  vpx_codec_control(&encoder, VP9E_SET_DISABLE_OVERSHOOT_MAXQ_CBR, 0);
+
   svc_drop_frame.framedrop_mode = FULL_SUPERFRAME_DROP;
   for (sl = 0; sl < (unsigned int)svc_ctx.spatial_layers; ++sl)
     svc_drop_frame.framedrop_thresh[sl] = enc_cfg.rc_dropframe_thresh;

examples/vpx_temporal_svc_encoder.c

@@ -831,6 +831,7 @@ int main(int argc, char **argv) {
   } else if (strncmp(encoder->name, "vp9", 3) == 0) {
     vpx_svc_extra_cfg_t svc_params;
     memset(&svc_params, 0, sizeof(svc_params));
+    vpx_codec_control(&codec, VP9E_SET_DISABLE_OVERSHOOT_MAXQ_CBR, 0);
     vpx_codec_control(&codec, VP8E_SET_CPUUSED, speed);
     vpx_codec_control(&codec, VP9E_SET_AQ_MODE, 3);
     vpx_codec_control(&codec, VP9E_SET_GF_CBR_BOOST_PCT, 0);

vp9/encoder/vp9_ratectrl.c

@@ -441,6 +441,7 @@ void vp9_rc_init(const VP9EncoderConfig *oxcf, int pass, RATE_CONTROL *rc) {
   rc->last_post_encode_dropped_scene_change = 0;
   rc->use_post_encode_drop = 0;
   rc->ext_use_post_encode_drop = 0;
+  rc->disable_overshoot_maxq_cbr = 0;
   rc->arf_active_best_quality_adjustment_factor = 1.0;
   rc->arf_increase_active_best_quality = 0;
   rc->preserve_arf_as_gld = 0;

vp9/encoder/vp9_ratectrl.h

@@ -195,7 +195,8 @@ typedef struct {
   int use_post_encode_drop;
   // External flag to enable post encode frame dropping, controlled by user.
   int ext_use_post_encode_drop;
-
+  // Flag to disable CBR feature to increase Q on overshoot detection.
+  int disable_overshoot_maxq_cbr;
   int damped_adjustment[RATE_FACTOR_LEVELS];
   double arf_active_best_quality_adjustment_factor;
   int arf_increase_active_best_quality;

vp9/encoder/vp9_speed_features.c

@@ -621,7 +621,7 @@ static void set_rt_speed_feature_framesize_independent(
     // increase in encoding time.
     if (cpi->use_svc && svc->spatial_layer_id > 0) sf->nonrd_keyframe = 1;
     if (cm->frame_type != KEY_FRAME && cpi->resize_state == ORIG &&
-        cpi->oxcf.rc_mode == VPX_CBR) {
+        cpi->oxcf.rc_mode == VPX_CBR && !cpi->rc.disable_overshoot_maxq_cbr) {
       if (cm->width * cm->height <= 352 * 288 && !cpi->use_svc &&
           cpi->oxcf.content != VP9E_CONTENT_SCREEN)
         sf->overshoot_detection_cbr_rt = RE_ENCODE_MAXQ;
@@ -668,7 +668,7 @@ static void set_rt_speed_feature_framesize_independent(
       sf->base_mv_aggressive = 1;
     }
     if (cm->frame_type != KEY_FRAME && cpi->resize_state == ORIG &&
-        cpi->oxcf.rc_mode == VPX_CBR)
+        cpi->oxcf.rc_mode == VPX_CBR && !cpi->rc.disable_overshoot_maxq_cbr)
       sf->overshoot_detection_cbr_rt = FAST_DETECTION_MAXQ;
   }
 

vp9/vp9_cx_iface.c

@@ -1716,6 +1716,14 @@ static vpx_codec_err_t ctrl_set_postencode_drop(vpx_codec_alg_priv_t *ctx,
   return VPX_CODEC_OK;
 }
 
+static vpx_codec_err_t ctrl_set_disable_overshoot_maxq_cbr(
+    vpx_codec_alg_priv_t *ctx, va_list args) {
+  VP9_COMP *const cpi = ctx->cpi;
+  const unsigned int data = va_arg(args, unsigned int);
+  cpi->rc.disable_overshoot_maxq_cbr = data;
+  return VPX_CODEC_OK;
+}
+
 static vpx_codec_ctrl_fn_map_t encoder_ctrl_maps[] = {
   { VP8_COPY_REFERENCE, ctrl_copy_reference },
 
@@ -1760,6 +1768,7 @@ static vpx_codec_ctrl_fn_map_t encoder_ctrl_maps[] = {
   { VP9E_SET_TARGET_LEVEL, ctrl_set_target_level },
   { VP9E_SET_ROW_MT, ctrl_set_row_mt },
   { VP9E_SET_POSTENCODE_DROP, ctrl_set_postencode_drop },
+  { VP9E_SET_DISABLE_OVERSHOOT_MAXQ_CBR, ctrl_set_disable_overshoot_maxq_cbr },
   { VP9E_ENABLE_MOTION_VECTOR_UNIT_TEST, ctrl_enable_motion_vector_unit_test },
   { VP9E_SET_SVC_INTER_LAYER_PRED, ctrl_set_svc_inter_layer_pred },
   { VP9E_SET_SVC_FRAME_DROP_LAYER, ctrl_set_svc_frame_drop_layer },

vpx/vp8cx.h

@@ -684,6 +684,14 @@ enum vp8e_enc_control_id {
    * Supported in codecs: VP9
    */
   VP9E_SET_DELTA_Q_UV,
+
+  /*!\brief Codec control function to disable increase Q on overshoot in CBR.
+   *
+   * 0: On (default), 1: Disable.
+   *
+   * Supported in codecs: VP9
+   */
+  VP9E_SET_DISABLE_OVERSHOOT_MAXQ_CBR,
 };
 
 /*!\brief vpx 1-D scaling mode
@@ -1034,6 +1042,8 @@ VPX_CTRL_USE_TYPE(VP9E_SET_POSTENCODE_DROP, unsigned int)
 VPX_CTRL_USE_TYPE(VP9E_SET_DELTA_Q_UV, int)
 #define VPX_CTRL_VP9E_SET_DELTA_Q_UV
 
+VPX_CTRL_USE_TYPE(VP9E_SET_DISABLE_OVERSHOOT_MAXQ_CBR, int)
+#define VPX_CTRL_VP9E_SET_DISABLE_OVERSHOOT_MAXQ_CBR
 /*!\endcond */
 /*! @} - end defgroup vp8_encoder */
 #ifdef __cplusplus