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vc1dec: factor lut clean code 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-04-26 15:28:09 +02:00
parent ba323d67fa
commit ee4c01bef6
1 changed files with 23 additions and 25 deletions
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48
libavcodec/vc1.c
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@ -576,25 +576,6 @@ int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContex
return 0;
}
static void rotate_luts(VC1Context *v)
{
#define ROTATE(DEF, L, N, C, A) do {\
if (v->s.pict_type == AV_PICTURE_TYPE_BI || v->s.pict_type == AV_PICTURE_TYPE_B) {\
C = A;\
} else {\
DEF;\
memcpy(&tmp, &L , sizeof(tmp));\
memcpy(&L , &N , sizeof(tmp));\
memcpy(&N , &tmp, sizeof(tmp));\
C = N;\
}\
}while(0)
ROTATE(int tmp , v->last_use_ic, v->next_use_ic, v->curr_use_ic, v->aux_use_ic);
ROTATE(uint8_t tmp[2][256], v->last_luty , v->next_luty , v->curr_luty , v->aux_luty);
ROTATE(uint8_t tmp[2][256], v->last_lutuv, v->next_lutuv, v->curr_lutuv, v->aux_lutuv);
}
/* fill lookup tables for intensity compensation */
#define INIT_LUT(lumscale, lumshift, luty, lutuv, chain) do {\
int scale, shift, i; \
@ -619,6 +600,29 @@ static void rotate_luts(VC1Context *v)
}while(0)
static void rotate_luts(VC1Context *v)
{
#define ROTATE(DEF, L, N, C, A) do {\
if (v->s.pict_type == AV_PICTURE_TYPE_BI || v->s.pict_type == AV_PICTURE_TYPE_B) {\
C = A;\
} else {\
DEF;\
memcpy(&tmp, &L , sizeof(tmp));\
memcpy(&L , &N , sizeof(tmp));\
memcpy(&N , &tmp, sizeof(tmp));\
C = N;\
}\
}while(0)
ROTATE(int tmp , v->last_use_ic, v->next_use_ic, v->curr_use_ic, v->aux_use_ic);
ROTATE(uint8_t tmp[2][256], v->last_luty , v->next_luty , v->curr_luty , v->aux_luty);
ROTATE(uint8_t tmp[2][256], v->last_lutuv, v->next_lutuv, v->curr_lutuv, v->aux_lutuv);
INIT_LUT(32, 0 , v->curr_luty[0] , v->curr_lutuv[0] , 0);
INIT_LUT(32, 0 , v->curr_luty[1] , v->curr_lutuv[1] , 0);
v->curr_use_ic = 0;
}
int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
{
int pqindex, lowquant, status;
@ -709,9 +713,6 @@ int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
if(v->first_pic_header_flag) {
rotate_luts(v);
INIT_LUT(32, 0 , v->curr_luty[0] , v->curr_lutuv[0] , 0);
INIT_LUT(32, 0 , v->curr_luty[1] , v->curr_lutuv[1] , 0);
v->curr_use_ic = 0;
}
switch (v->s.pict_type) {
@ -986,9 +987,6 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
if(v->first_pic_header_flag) {
rotate_luts(v);
INIT_LUT(32, 0 , v->curr_luty[0] , v->curr_lutuv[0] , 0);
INIT_LUT(32, 0 , v->curr_luty[1] , v->curr_lutuv[1] , 0);
v->curr_use_ic = 0;
}
switch (v->s.pict_type) {