hevc: eliminate unnecessary cbf_c{b,r} arrays

- They are be replaced by passing additional parameters to the transform
functions.
- Adaptation to 4:2:2
Signed-off-by: Mickaël Raulet <mraulet@insa-rennes.fr>
cherry picked from commit f518bb22531c648f1c37f978b0c7ad2e71e04c25
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/hevc.h

@@ -82,8 +82,6 @@
  */
 #define SAMPLE(tab, x, y) ((tab)[(y) * s->sps->width + (x)])
 #define SAMPLE_CTB(tab, x, y) ((tab)[(y) * min_cb_width + (x)])
-#define SAMPLE_CBF(tab, x, y) ((tab)[((y) & ((1<<log2_trafo_size)-1)) * MAX_CU_SIZE + ((x) & ((1<<log2_trafo_size)-1))])
-#define SAMPLE_CBF2(tab, x, y) ((tab)[(y) * MAX_CU_SIZE +  (x)])
 
 #define IS_IDR(s) ((s)->nal_unit_type == NAL_IDR_W_RADL || (s)->nal_unit_type == NAL_IDR_N_LP)
 #define IS_BLA(s) ((s)->nal_unit_type == NAL_BLA_W_RADL || (s)->nal_unit_type == NAL_BLA_W_LP || \
@@ -686,8 +684,6 @@ typedef struct PredictionUnit {
 } PredictionUnit;
 
 typedef struct TransformTree {
-    uint8_t cbf_cb[MAX_TRANSFORM_DEPTH][MAX_CU_SIZE * MAX_CU_SIZE];
-    uint8_t cbf_cr[MAX_TRANSFORM_DEPTH][MAX_CU_SIZE * MAX_CU_SIZE];
     uint8_t cbf_luma;
 
     // Inferred parameters