[spatial svc] Remove some restrictions that are needed to improve the quality

Change-Id: I76a48b03388a8c5cc74b871deb836cd92263b306

vp9/encoder/vp9_firstpass.c

@@ -46,6 +46,9 @@
 #define GF_RMAX    96.0
 #define ERR_DIVISOR   150.0
 #define MIN_DECAY_FACTOR 0.1
+#define SVC_FACTOR_PT_LOW 0.45
+#define FACTOR_PT_LOW 0.5
+#define FACTOR_PT_HIGH 0.9
 
 #define KF_MB_INTRA_MIN 150
 #define GF_MB_INTRA_MIN 100
@@ -938,8 +941,8 @@ static int get_twopass_worst_quality(const VP9_COMP *cpi,
     for (q = rc->best_quality; q < rc->worst_quality; ++q) {
       const double factor =
           calc_correction_factor(err_per_mb, ERR_DIVISOR,
-                                 is_svc_upper_layer ? 0.8 : 0.5,
-                                 is_svc_upper_layer ? 1.0 : 0.90, q);
+                                 is_svc_upper_layer ? SVC_FACTOR_PT_LOW :
+                                 FACTOR_PT_LOW, FACTOR_PT_HIGH, q);
       const int bits_per_mb = vp9_rc_bits_per_mb(INTER_FRAME, q,
                                                  factor * speed_term);
       if (bits_per_mb <= target_norm_bits_per_mb)
@@ -2189,20 +2192,23 @@ void vp9_rc_get_second_pass_params(VP9_COMP *cpi) {
     // Define next KF group and assign bits to it.
     this_frame_copy = this_frame;
     find_next_key_frame(cpi, &this_frame_copy);
-    // Don't place key frame in any enhancement layers in spatial svc
-    if (is_spatial_svc) {
-      lc->is_key_frame = 1;
-      if (cpi->svc.spatial_layer_id > 0) {
-        cm->frame_type = INTER_FRAME;
-      }
-    }
   } else {
-    if (is_spatial_svc) {
-      lc->is_key_frame = 0;
-    }
     cm->frame_type = INTER_FRAME;
   }
 
+  if (is_spatial_svc) {
+    if (cpi->svc.spatial_layer_id == 0) {
+      lc->is_key_frame = (cm->frame_type == KEY_FRAME);
+    } else {
+      cm->frame_type = INTER_FRAME;
+      lc->is_key_frame = cpi->svc.layer_context[0].is_key_frame;
+
+      if (lc->is_key_frame) {
+        cpi->ref_frame_flags &= (~VP9_LAST_FLAG);
+      }
+    }
+  }
+
   // Is this frame a GF / ARF? (Note: a key frame is always also a GF).
   if (rc->frames_till_gf_update_due == 0) {
     // Define next gf group and assign bits to it.

vpx/src/svc_encodeframe.c

@@ -496,7 +496,6 @@ vpx_codec_err_t vpx_svc_set_scale_factors(SvcContext *svc_ctx,
 vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
                              vpx_codec_iface_t *iface,
                              vpx_codec_enc_cfg_t *enc_cfg) {
-  int max_intra_size_pct;
   vpx_codec_err_t res;
   SvcInternal *const si = get_svc_internal(svc_ctx);
   if (svc_ctx == NULL || codec_ctx == NULL || iface == NULL ||
@@ -575,7 +574,6 @@ vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
   // modify encoder configuration
   enc_cfg->ss_number_layers = si->layers;
   enc_cfg->ts_number_layers = 1;  // Temporal layers not used in this encoder.
-  enc_cfg->kf_mode = VPX_KF_DISABLED;
   // Lag in frames not currently supported
   enc_cfg->g_lag_in_frames = 0;
 
@@ -605,16 +603,8 @@ vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
   }
 
   vpx_codec_control(codec_ctx, VP9E_SET_SVC, 1);
-  vpx_codec_control(codec_ctx, VP8E_SET_CPUUSED, 1);
-  vpx_codec_control(codec_ctx, VP8E_SET_STATIC_THRESHOLD, 1);
-  vpx_codec_control(codec_ctx, VP8E_SET_NOISE_SENSITIVITY, 1);
   vpx_codec_control(codec_ctx, VP8E_SET_TOKEN_PARTITIONS, 1);
 
-  max_intra_size_pct =
-      (int)(((double)enc_cfg->rc_buf_optimal_sz * 0.5) *
-            ((double)enc_cfg->g_timebase.den / enc_cfg->g_timebase.num) / 10.0);
-  vpx_codec_control(codec_ctx, VP8E_SET_MAX_INTRA_BITRATE_PCT,
-                    max_intra_size_pct);
   return VPX_CODEC_OK;
 }
 
@@ -869,8 +859,7 @@ vpx_codec_err_t vpx_svc_encode(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
   si->rc_stats_buf_used = 0;
 
   si->layers = svc_ctx->spatial_layers;
-  if (si->frame_within_gop >= si->kf_dist ||
-      si->encode_frame_count == 0) {
+  if (si->encode_frame_count == 0) {
     si->frame_within_gop = 0;
   }
   si->is_keyframe = (si->frame_within_gop == 0);