Add frame-level flag to turn on/off adapt_scan

Change-Id: I7a73dbe72b618e795191cc31bc32e31ad99d8587

av1/common/onyxc_int.h

@@ -541,6 +541,9 @@ typedef struct AV1Common {
 #if CONFIG_LPF_SB
   int final_lpf_encode;
 #endif
+#if CONFIG_ADAPT_SCAN
+  int use_adapt_scan;
+#endif
 } AV1_COMMON;
 
 // TODO(hkuang): Don't need to lock the whole pool after implementing atomic

av1/common/scan.c

@@ -8239,7 +8239,7 @@ static void update_scan_count(int16_t *scan, int max_scan,
 void av1_update_scan_count_facade(AV1_COMMON *cm, FRAME_COUNTS *counts,
                                   TX_SIZE tx_size, TX_TYPE tx_type,
                                   const tran_low_t *dqcoeffs, int max_scan) {
-  if (do_adapt_scan(tx_size, tx_type)) {
+  if (cm->use_adapt_scan && do_adapt_scan(tx_size, tx_type)) {
     int16_t *scan = get_adapt_scan(cm->fc, tx_size, tx_type);
     uint32_t *non_zero_count = get_non_zero_counts(counts, tx_size, tx_type);
     update_scan_count(scan, max_scan, dqcoeffs, non_zero_count);
@@ -8550,25 +8550,27 @@ void av1_init_scan_order(AV1_COMMON *cm) {
 }
 void av1_adapt_scan_order(AV1_COMMON *cm) {
-  TX_SIZE tx_size;
+  if (cm->use_adapt_scan) {
+    TX_SIZE tx_size;
 #if CACHE_SCAN_PROB
-  int use_curr_frame = 0;
+    int use_curr_frame = 0;
 #else   // CACHE_SCAN_PROB
-  int use_curr_frame = 1;
+    int use_curr_frame = 1;
 #endif  // CACHE_SCAN_PROB
-  for (tx_size = 0; tx_size < TX_SIZES_ALL; ++tx_size) {
+    for (tx_size = 0; tx_size < TX_SIZES_ALL; ++tx_size) {
 #if CONFIG_RECT_TX && (CONFIG_EXT_TX || CONFIG_VAR_TX)
-    if (tx_size > TX_32X16) continue;
+      if (tx_size > TX_32X16) continue;
 #else
-    if (tx_size >= TX_SIZES) continue;
+      if (tx_size >= TX_SIZES) continue;
 #endif  // CONFIG_RECT_TX && (CONFIG_EXT_TX || CONFIG_VAR_TX)
-    TX_TYPE tx_type;
-    for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
-      if (do_adapt_scan(tx_size, tx_type)) {
-        update_scan_prob(cm, tx_size, tx_type, ADAPT_SCAN_UPDATE_RATE);
-        update_scan_order_facade(cm, tx_size, tx_type, use_curr_frame);
-        update_eob_threshold(cm, tx_size, tx_type);
+      TX_TYPE tx_type;
+      for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
+        if (do_adapt_scan(tx_size, tx_type)) {
+          update_scan_prob(cm, tx_size, tx_type, ADAPT_SCAN_UPDATE_RATE);
+          update_scan_order_facade(cm, tx_size, tx_type, use_curr_frame);
+          update_eob_threshold(cm, tx_size, tx_type);
+        }
       }
     }
   }

av1/decoder/decodeframe.c

@@ -5167,6 +5167,13 @@ static size_t read_uncompressed_header(AV1Decoder *pbi,
   cm->reduced_tx_set_used = aom_rb_read_bit(rb);
 #endif  // CONFIG_EXT_TX
 
+#if CONFIG_ADAPT_SCAN
+  cm->use_adapt_scan = aom_rb_read_bit(rb);
+  // TODO(angiebird): call av1_init_scan_order only when use_adapt_scan
+  // switches from 1 to 0
+  if (cm->use_adapt_scan == 0) av1_init_scan_order(cm);
+#endif  // CONFIG_ADAPT_SCAN
+
 #if CONFIG_EXT_REFS || CONFIG_TEMPMV_SIGNALING
   // NOTE(zoeliu): As cm->prev_frame can take neither a frame of
   //               show_exisiting_frame=1, nor can it take a frame not used as

av1/encoder/bitstream.c

@@ -4813,6 +4813,10 @@ static void write_uncompressed_header_frame(AV1_COMP *cpi,
   aom_wb_write_bit(wb, cm->reduced_tx_set_used);
 #endif  // CONFIG_EXT_TX
 
+#if CONFIG_ADAPT_SCAN
+  aom_wb_write_bit(wb, cm->use_adapt_scan);
+#endif
+
 #if CONFIG_GLOBAL_MOTION
   if (!frame_is_intra_only(cm)) write_global_motion(cpi, wb);
 #endif  // CONFIG_GLOBAL_MOTION

av1/encoder/encodeframe.c

@@ -5579,6 +5579,12 @@ void av1_encode_frame(AV1_COMP *cpi) {
   // rather than the potential full set of 16 transforms
   cm->reduced_tx_set_used = 0;
 #endif  // CONFIG_EXT_TX
+#if CONFIG_ADAPT_SCAN
+  cm->use_adapt_scan = 1;
+  // TODO(angiebird): call av1_init_scan_order only when use_adapt_scan
+  // switches from 1 to 0
+  if (cm->use_adapt_scan == 0) av1_init_scan_order(cm);
+#endif
 
 #if CONFIG_FRAME_MARKER
   if (cm->show_frame == 0) {