Using pd->dqcoeff instead of pd->qcoeff in the decoder.

It is more logical to use dqcoeff buffer to put there *dequantized*
transform coefficients (inside inverse_transform_block and
decode_coefs functions). Dequantization happens inside WRITE_COEF_CONTINUE
macro.

qcoeff buffer should be only used in the encoder for *quantized*
transform coefficients.

Change-Id: Ifd54bef272bbf5311ced6669c4f1079f998af5d7

2 files changed, 14 insertions, 14 deletions

diff --git a/vp9/decoder/vp9_decodframe.c b/vp9/decoder/vp9_decodframe.c
index 1fd9e979a..4746a3abd 100644
--- a/vp9/decoder/vp9_decodframe.c
+++ b/vp9/decoder/vp9_decodframe.c
@@ -248,7 +248,7 @@ static void alloc_tile_storage(VP9D_COMP *pbi, int tile_cols) {
 static void inverse_transform_block(MACROBLOCKD* xd, int plane, int block,
                                     BLOCK_SIZE plane_bsize, TX_SIZE tx_size) {
   struct macroblockd_plane *const pd = &xd->plane[plane];
-  int16_t* const qcoeff = BLOCK_OFFSET(pd->qcoeff, block);
+  int16_t* const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
   const int stride = pd->dst.stride;
   const int eob = pd->eobs[block];
   if (eob > 0) {
@@ -261,35 +261,35 @@ static void inverse_transform_block(MACROBLOCKD* xd, int plane, int block,
       case TX_4X4:
         tx_type = get_tx_type_4x4(pd->plane_type, xd, raster_block);
         if (tx_type == DCT_DCT)
-          xd->itxm_add(qcoeff, dst, stride, eob);
+          xd->itxm_add(dqcoeff, dst, stride, eob);
         else
-          vp9_iht4x4_16_add(qcoeff, dst, stride, tx_type);
+          vp9_iht4x4_16_add(dqcoeff, dst, stride, tx_type);
         break;
       case TX_8X8:
         tx_type = get_tx_type_8x8(pd->plane_type, xd);
-        vp9_iht8x8_add(tx_type, qcoeff, dst, stride, eob);
+        vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob);
         break;
       case TX_16X16:
         tx_type = get_tx_type_16x16(pd->plane_type, xd);
-        vp9_iht16x16_add(tx_type, qcoeff, dst, stride, eob);
+        vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob);
         break;
       case TX_32X32:
         tx_type = DCT_DCT;
-        vp9_idct32x32_add(qcoeff, dst, stride, eob);
+        vp9_idct32x32_add(dqcoeff, dst, stride, eob);
         break;
       default:
         assert(!"Invalid transform size");
     }
 
     if (eob == 1) {
-      vpx_memset(qcoeff, 0, 2 * sizeof(qcoeff[0]));
+      vpx_memset(dqcoeff, 0, 2 * sizeof(dqcoeff[0]));
     } else {
       if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10)
-        vpx_memset(qcoeff, 0, 4 * (4 << tx_size) * sizeof(qcoeff[0]));
+        vpx_memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0]));
       else if (tx_size == TX_32X32 && eob <= 34)
-        vpx_memset(qcoeff, 0, 256 * sizeof(qcoeff[0]));
+        vpx_memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0]));
       else
-        vpx_memset(qcoeff, 0, (16 << (tx_size << 1)) * sizeof(qcoeff[0]));
+        vpx_memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));
     }
   }
 }
@@ -1335,7 +1335,7 @@ int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) {
   cm->fc = cm->frame_contexts[cm->frame_context_idx];
   vp9_zero(cm->counts);
   for (i = 0; i < MAX_MB_PLANE; ++i)
-    vp9_zero(xd->plane[i].qcoeff);
+    vp9_zero(xd->plane[i].dqcoeff);
 
   xd->corrupted = 0;
   new_fb->corrupted = read_compressed_header(pbi, data, first_partition_size);
diff --git a/vp9/decoder/vp9_detokenize.c b/vp9/decoder/vp9_detokenize.c
index 84a75e4ab..010b8fe33 100644
--- a/vp9/decoder/vp9_detokenize.c
+++ b/vp9/decoder/vp9_detokenize.c
@@ -74,7 +74,7 @@ static const vp9_prob cat6_prob[15] = {
 
 #define WRITE_COEF_CONTINUE(val, token)                  \
   {                                                      \
-    qcoeff_ptr[scan[c]] = vp9_read_and_apply_sign(r, val) * \
+    dqcoeff_ptr[scan[c]] = vp9_read_and_apply_sign(r, val) * \
                             dq[c > 0] / (1 + (tx_size == TX_32X32)); \
     INCREMENT_COUNT(token);                              \
     token_cache[scan[c]] = vp9_pt_energy_class[token];   \
@@ -89,7 +89,7 @@ static const vp9_prob cat6_prob[15] = {
 
 static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
                         vp9_reader *r, int block_idx,
-                        PLANE_TYPE type, int seg_eob, int16_t *qcoeff_ptr,
+                        PLANE_TYPE type, int seg_eob, int16_t *dqcoeff_ptr,
                         TX_SIZE tx_size, const int16_t *dq, int pt,
                         uint8_t *token_cache) {
   const FRAME_CONTEXT *const fc = &cm->fc;
@@ -223,7 +223,7 @@ int vp9_decode_block_tokens(VP9_COMMON *cm, MACROBLOCKD *xd,
                                     pd->left_context + loff);
 
   eob = decode_coefs(cm, xd, r, block,
-                     pd->plane_type, seg_eob, BLOCK_OFFSET(pd->qcoeff, block),
+                     pd->plane_type, seg_eob, BLOCK_OFFSET(pd->dqcoeff, block),
                      tx_size, pd->dequant, pt, token_cache);
 
   set_contexts(xd, pd, plane_bsize, tx_size, eob > 0, aoff, loff);