Removed shadow warnings : bitstream.c encodeframe.c onyx_if.c

ratectrl.c and quantize.c

Adding -Wshadow to CFLAGS generated a bunch of warnings.  This patch
removes these warnings.

Change-Id: I8c8faa9fde57c1c49662d332a90bc8d9a0f4a2ce

vp8/encoder/bitstream.c

@@ -90,17 +90,17 @@ static void update_mode(
 
     if (new_b + (n << 8) < old_b)
     {
-        int i = 0;
+        int j = 0;
 
         vp8_write_bit(w, 1);
 
         do
         {
-            const vp8_prob p = Pnew[i];
+            const vp8_prob p = Pnew[j];
 
-            vp8_write_literal(w, Pcur[i] = p ? p : 1, 8);
+            vp8_write_literal(w, Pcur[j] = p ? p : 1, 8);
         }
-        while (++i < n);
+        while (++j < n);
     }
     else
         vp8_write_bit(w, 0);
@@ -245,15 +245,15 @@ void vp8_pack_tokens_c(vp8_writer *w, const TOKENEXTRA *p, int xcount)
 
             if (L)
             {
-                const unsigned char *pp = b->prob;
-                int v = e >> 1;
-                int n = L;              /* number of bits in v, assumed nonzero */
-                int i = 0;
+                const unsigned char *proba = b->prob;
+                const int v2 = e >> 1;
+                int n2 = L;              /* number of bits in v2, assumed nonzero */
+                i = 0;
 
                 do
                 {
-                    const int bb = (v >> --n) & 1;
-                    split = 1 + (((range - 1) * pp[i>>1]) >> 8);
+                    const int bb = (v2 >> --n2) & 1;
+                    split = 1 + (((range - 1) * proba[i>>1]) >> 8);
                     i = b->tree[i+bb];
 
                     if (bb)
@@ -301,7 +301,7 @@ void vp8_pack_tokens_c(vp8_writer *w, const TOKENEXTRA *p, int xcount)
 
                     lowvalue <<= shift;
                 }
-                while (n);
+                while (n2);
             }
 
 

vp8/encoder/encodeframe.c

@@ -852,11 +852,10 @@ void vp8_encode_frame(VP8_COMP *cpi)
 
             if (xd->segmentation_enabled)
             {
-                int i, j;
+                int j;
 
                 if (xd->segmentation_enabled)
                 {
-
                     for (i = 0; i < cpi->encoding_thread_count; i++)
                     {
                         for (j = 0; j < 4; j++)

vp8/encoder/onyx_if.c

@@ -826,7 +826,7 @@ void vp8_set_speed_features(VP8_COMP *cpi)
         {
             unsigned int sum = 0;
             unsigned int total_mbs = cm->MBs;
-            int i, thresh;
+            int thresh;
             unsigned int total_skip;
 
             int min = 2000;

vp8/encoder/quantize.c

@@ -184,17 +184,17 @@ void vp8_strict_quantize_b_c(BLOCK *b, BLOCKD *d)
     for (i = 0; i < 16; i++)
     {
         int dq;
-        int round;
+        int rounding;
 
         /*TODO: These arrays should be stored in zig-zag order.*/
         rc = vp8_default_zig_zag1d[i];
         z = coeff_ptr[rc];
         dq = dequant_ptr[rc];
-        round = dq >> 1;
+        rounding = dq >> 1;
         /* Sign of z. */
         sz = -(z < 0);
         x = (z + sz) ^ sz;
-        x += round;
+        x += rounding;
         if (x >= dq)
         {
             /* Quantize x. */

vp8/encoder/ratectrl.c

@@ -614,7 +614,6 @@ static void calc_gf_params(VP8_COMP *cpi)
 static void calc_pframe_target_size(VP8_COMP *cpi)
 {
     int min_frame_target;
-    int Adjustment;
     int old_per_frame_bandwidth = cpi->per_frame_bandwidth;
 
     if ( cpi->current_layer > 0)
@@ -658,6 +657,7 @@ static void calc_pframe_target_size(VP8_COMP *cpi)
         /* 1 pass */
         else
         {
+            int Adjustment;
             /* Make rate adjustment to recover bits spent in key frame
              * Test to see if the key frame inter data rate correction
              * should still be in force
@@ -688,7 +688,7 @@ static void calc_pframe_target_size(VP8_COMP *cpi)
              */
             if ((cpi->gf_overspend_bits > 0) && (cpi->this_frame_target > min_frame_target))
             {
-                int Adjustment = (cpi->non_gf_bitrate_adjustment <= cpi->gf_overspend_bits) ? cpi->non_gf_bitrate_adjustment : cpi->gf_overspend_bits;
+                Adjustment = (cpi->non_gf_bitrate_adjustment <= cpi->gf_overspend_bits) ? cpi->non_gf_bitrate_adjustment : cpi->gf_overspend_bits;
 
                 if (Adjustment > (cpi->this_frame_target - min_frame_target))
                     Adjustment = (cpi->this_frame_target - min_frame_target);