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prevent "mb level" get_cabac() calls from being inlined (3% faster decode_mb_cabac() on P3) 

Originally committed as revision 6674 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-10-12 14:49:19 +00:00
parent 1f6049f515
commit 851ded8918
2 changed files with 39 additions and 29 deletions
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10
libavcodec/cabac.h
View File

@ -359,7 +359,7 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){
refill(c);
}
static int get_cabac(CABACContext *c, uint8_t * const state){
static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state){
//FIXME gcc generates duplicate load/stores for c->low and c->range
#ifdef ARCH_X86
int bit;
@ -563,6 +563,14 @@ static int get_cabac(CABACContext *c, uint8_t * const state){
return bit;
}
static int __attribute((noinline)) get_cabac_noinline(CABACContext *c, uint8_t * const state){
return get_cabac_inline(c,state);
}
static int get_cabac(CABACContext *c, uint8_t * const state){
return get_cabac_inline(c,state);
}
static int get_cabac_bypass(CABACContext *c){
c->low += c->low;

58
libavcodec/h264.c
View File

@ -5633,7 +5633,7 @@ static int decode_cabac_field_decoding_flag(H264Context *h) {
ctx += 1;
}
return get_cabac( &h->cabac, &h->cabac_state[70 + ctx] );
return get_cabac_noinline( &h->cabac, &h->cabac_state[70 + ctx] );
}
static int decode_cabac_intra_mb_type(H264Context *h, int ctx_base, int intra_slice) {
@ -5649,11 +5649,11 @@ static int decode_cabac_intra_mb_type(H264Context *h, int ctx_base, int intra_sl
ctx++;
if( h->slice_table[mbb_xy] == h->slice_num && !IS_INTRA4x4( s->current_picture.mb_type[mbb_xy] ) )
ctx++;
if( get_cabac( &h->cabac, &state[ctx] ) == 0 )
if( get_cabac_noinline( &h->cabac, &state[ctx] ) == 0 )
return 0; /* I4x4 */
state += 2;
}else{
if( get_cabac( &h->cabac, &state[0] ) == 0 )
if( get_cabac_noinline( &h->cabac, &state[0] ) == 0 )
return 0; /* I4x4 */
}
@ -5661,11 +5661,11 @@ static int decode_cabac_intra_mb_type(H264Context *h, int ctx_base, int intra_sl
return 25; /* PCM */
mb_type = 1; /* I16x16 */
mb_type += 12 * get_cabac( &h->cabac, &state[1] ); /* cbp_luma != 0 */
if( get_cabac( &h->cabac, &state[2] ) ) /* cbp_chroma */
mb_type += 4 + 4 * get_cabac( &h->cabac, &state[2+intra_slice] );
mb_type += 2 * get_cabac( &h->cabac, &state[3+intra_slice] );
mb_type += 1 * get_cabac( &h->cabac, &state[3+2*intra_slice] );
mb_type += 12 * get_cabac_noinline( &h->cabac, &state[1] ); /* cbp_luma != 0 */
if( get_cabac_noinline( &h->cabac, &state[2] ) ) /* cbp_chroma */
mb_type += 4 + 4 * get_cabac_noinline( &h->cabac, &state[2+intra_slice] );
mb_type += 2 * get_cabac_noinline( &h->cabac, &state[3+intra_slice] );
mb_type += 1 * get_cabac_noinline( &h->cabac, &state[3+2*intra_slice] );
return mb_type;
}
@ -5675,14 +5675,14 @@ static int decode_cabac_mb_type( H264Context *h ) {
if( h->slice_type == I_TYPE ) {
return decode_cabac_intra_mb_type(h, 3, 1);
} else if( h->slice_type == P_TYPE ) {
if( get_cabac( &h->cabac, &h->cabac_state[14] ) == 0 ) {
if( get_cabac_noinline( &h->cabac, &h->cabac_state[14] ) == 0 ) {
/* P-type */
if( get_cabac( &h->cabac, &h->cabac_state[15] ) == 0 ) {
if( get_cabac_noinline( &h->cabac, &h->cabac_state[15] ) == 0 ) {
/* P_L0_D16x16, P_8x8 */
return 3 * get_cabac( &h->cabac, &h->cabac_state[16] );
return 3 * get_cabac_noinline( &h->cabac, &h->cabac_state[16] );
} else {
/* P_L0_D8x16, P_L0_D16x8 */
return 2 - get_cabac( &h->cabac, &h->cabac_state[17] );
return 2 - get_cabac_noinline( &h->cabac, &h->cabac_state[17] );
}
} else {
return decode_cabac_intra_mb_type(h, 17, 0) + 5;
@ -5698,17 +5698,17 @@ static int decode_cabac_mb_type( H264Context *h ) {
if( h->slice_table[mbb_xy] == h->slice_num && !IS_DIRECT( s->current_picture.mb_type[mbb_xy] ) )
ctx++;
if( !get_cabac( &h->cabac, &h->cabac_state[27+ctx] ) )
if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+ctx] ) )
return 0; /* B_Direct_16x16 */
if( !get_cabac( &h->cabac, &h->cabac_state[27+3] ) ) {
return 1 + get_cabac( &h->cabac, &h->cabac_state[27+5] ); /* B_L[01]_16x16 */
if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+3] ) ) {
return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ); /* B_L[01]_16x16 */
}
bits = get_cabac( &h->cabac, &h->cabac_state[27+4] ) << 3;
bits|= get_cabac( &h->cabac, &h->cabac_state[27+5] ) << 2;
bits|= get_cabac( &h->cabac, &h->cabac_state[27+5] ) << 1;
bits|= get_cabac( &h->cabac, &h->cabac_state[27+5] );
bits = get_cabac_noinline( &h->cabac, &h->cabac_state[27+4] ) << 3;
bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 2;
bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 1;
bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
if( bits < 8 )
return bits + 3; /* B_Bi_16x16 through B_L1_L0_16x8 */
else if( bits == 13 ) {
@ -5718,7 +5718,7 @@ static int decode_cabac_mb_type( H264Context *h ) {
else if( bits == 15 )
return 22; /* B_8x8 */
bits= ( bits<<1 ) | get_cabac( &h->cabac, &h->cabac_state[27+5] );
bits= ( bits<<1 ) | get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
return bits - 4; /* B_L0_Bi_* through B_Bi_Bi_* */
} else {
/* TODO SI/SP frames? */
@ -5759,7 +5759,7 @@ static int decode_cabac_mb_skip( H264Context *h, int mb_x, int mb_y ) {
if( h->slice_type == B_TYPE )
ctx += 13;
return get_cabac( &h->cabac, &h->cabac_state[11+ctx] );
return get_cabac_noinline( &h->cabac, &h->cabac_state[11+ctx] );
}
static int decode_cabac_mb_intra4x4_pred_mode( H264Context *h, int pred_mode ) {
@ -5791,12 +5791,12 @@ static int decode_cabac_mb_chroma_pre_mode( H264Context *h) {
if( h->slice_table[mbb_xy] == h->slice_num && h->chroma_pred_mode_table[mbb_xy] != 0 )
ctx++;
if( get_cabac( &h->cabac, &h->cabac_state[64+ctx] ) == 0 )
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+ctx] ) == 0 )
return 0;
if( get_cabac( &h->cabac, &h->cabac_state[64+3] ) == 0 )
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
return 1;
if( get_cabac( &h->cabac, &h->cabac_state[64+3] ) == 0 )
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
return 2;
else
return 3;
@ -5873,13 +5873,13 @@ static int decode_cabac_mb_cbp_chroma( H264Context *h) {
ctx = 0;
if( cbp_a > 0 ) ctx++;
if( cbp_b > 0 ) ctx += 2;
if( get_cabac( &h->cabac, &h->cabac_state[77 + ctx] ) == 0 )
if( get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] ) == 0 )
return 0;
ctx = 4;
if( cbp_a == 2 ) ctx++;
if( cbp_b == 2 ) ctx += 2;
return 1 + get_cabac( &h->cabac, &h->cabac_state[77 + ctx] );
return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] );
}
static int decode_cabac_mb_dqp( H264Context *h) {
MpegEncContext * const s = &h->s;
@ -5895,7 +5895,7 @@ static int decode_cabac_mb_dqp( H264Context *h) {
if( h->last_qscale_diff != 0 )
ctx++;
while( get_cabac( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
while( get_cabac_noinline( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
if( ctx < 2 )
ctx = 2;
else
@ -5937,7 +5937,7 @@ static int decode_cabac_b_mb_sub_type( H264Context *h ) {
}
static inline int decode_cabac_mb_transform_size( H264Context *h ) {
return get_cabac( &h->cabac, &h->cabac_state[399 + h->neighbor_transform_size] );
return get_cabac_noinline( &h->cabac, &h->cabac_state[399 + h->neighbor_transform_size] );
}
static int decode_cabac_mb_ref( H264Context *h, int list, int n ) {
@ -7410,8 +7410,10 @@ static int decode_slice(H264Context *h){
}
for(;;){
//START_TIMER
int ret = decode_mb_cabac(h);
int eos;
//STOP_TIMER("decode_mb_cabac")
if(ret>=0) hl_decode_mb(h);