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h264: move cabac[_state] into the per-slice context

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This commit is contained in:
Anton Khirnov 2015-01-17 22:28:46 +01:00
parent bf03a878a7
commit 30da98adbd
3 changed files with 108 additions and 102 deletions
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12
libavcodec/h264.h
View File

@ -396,6 +396,12 @@ typedef struct H264SliceContext {
///< as mb is addressed by scantable[i] and scantable is uint8_t we can either
///< check that i is not too large or ensure that there is some unused stuff after mb
int16_t mb_padding[256 * 2];
/**
* Cabac
*/
CABACContext cabac;
uint8_t cabac_state[1024];
} H264SliceContext;
/**
@ -476,12 +482,6 @@ typedef struct H264Context {
GetBitContext *intra_gb_ptr;
GetBitContext *inter_gb_ptr;
/**
* Cabac
*/
CABACContext cabac;
uint8_t cabac_state[1024];
/* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
uint16_t *cbp_table;
int cbp;

188
libavcodec/h264_cabac.c
View File

@ -1278,7 +1278,7 @@ void ff_h264_init_cabac_states(H264Context *h, H264SliceContext *sl)
if(pre > 124)
pre= 124 + (pre&1);
h->cabac_state[i] = pre;
sl->cabac_state[i] = pre;
}
}
@ -1291,13 +1291,13 @@ static int decode_cabac_field_decoding_flag(H264Context *h, H264SliceContext *sl
ctx += h->mb_field_decoding_flag & !!h->mb_x; //for FMO:(s->current_picture.mb_type[mba_xy] >> 7) & (h->slice_table[mba_xy] == h->slice_num);
ctx += (h->cur_pic.mb_type[mbb_xy] >> 7) & (h->slice_table[mbb_xy] == sl->slice_num);
return get_cabac_noinline( &h->cabac, &(h->cabac_state+70)[ctx] );
return get_cabac_noinline( &sl->cabac, &(sl->cabac_state+70)[ctx] );
}
static int decode_cabac_intra_mb_type(H264Context *h, H264SliceContext *sl,
int ctx_base, int intra_slice)
{
uint8_t *state= &h->cabac_state[ctx_base];
uint8_t *state= &sl->cabac_state[ctx_base];
int mb_type;
if(intra_slice){
@ -1306,23 +1306,23 @@ static int decode_cabac_intra_mb_type(H264Context *h, H264SliceContext *sl,
ctx++;
if (sl->top_type & (MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM))
ctx++;
if( get_cabac_noinline( &h->cabac, &state[ctx] ) == 0 )
if( get_cabac_noinline( &sl->cabac, &state[ctx] ) == 0 )
return 0; /* I4x4 */
state += 2;
}else{
if( get_cabac_noinline( &h->cabac, state ) == 0 )
if( get_cabac_noinline( &sl->cabac, state ) == 0 )
return 0; /* I4x4 */
}
if( get_cabac_terminate( &h->cabac ) )
if( get_cabac_terminate( &sl->cabac ) )
return 25; /* PCM */
mb_type = 1; /* I16x16 */
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] );
mb_type += 12 * get_cabac_noinline( &sl->cabac, &state[1] ); /* cbp_luma != 0 */
if( get_cabac_noinline( &sl->cabac, &state[2] ) ) /* cbp_chroma */
mb_type += 4 + 4 * get_cabac_noinline( &sl->cabac, &state[2+intra_slice] );
mb_type += 2 * get_cabac_noinline( &sl->cabac, &state[3+intra_slice] );
mb_type += 1 * get_cabac_noinline( &sl->cabac, &state[3+2*intra_slice] );
return mb_type;
}
@ -1360,18 +1360,19 @@ static int decode_cabac_mb_skip(H264Context *h, H264SliceContext *sl,
if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
ctx += 13;
return get_cabac_noinline( &h->cabac, &h->cabac_state[11+ctx] );
return get_cabac_noinline( &sl->cabac, &sl->cabac_state[11+ctx] );
}
static int decode_cabac_mb_intra4x4_pred_mode( H264Context *h, int pred_mode ) {
static int decode_cabac_mb_intra4x4_pred_mode(H264Context *h, H264SliceContext *sl, int pred_mode)
{
int mode = 0;
if( get_cabac( &h->cabac, &h->cabac_state[68] ) )
if( get_cabac( &sl->cabac, &sl->cabac_state[68] ) )
return pred_mode;
mode += 1 * get_cabac( &h->cabac, &h->cabac_state[69] );
mode += 2 * get_cabac( &h->cabac, &h->cabac_state[69] );
mode += 4 * get_cabac( &h->cabac, &h->cabac_state[69] );
mode += 1 * get_cabac( &sl->cabac, &sl->cabac_state[69] );
mode += 2 * get_cabac( &sl->cabac, &sl->cabac_state[69] );
mode += 4 * get_cabac( &sl->cabac, &sl->cabac_state[69] );
return mode + ( mode >= pred_mode );
}
@ -1390,34 +1391,36 @@ static int decode_cabac_mb_chroma_pre_mode(H264Context *h, H264SliceContext *sl)
if (sl->top_type && h->chroma_pred_mode_table[mbb_xy] != 0)
ctx++;
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+ctx] ) == 0 )
if( get_cabac_noinline( &sl->cabac, &sl->cabac_state[64+ctx] ) == 0 )
return 0;
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
if( get_cabac_noinline( &sl->cabac, &sl->cabac_state[64+3] ) == 0 )
return 1;
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
if( get_cabac_noinline( &sl->cabac, &sl->cabac_state[64+3] ) == 0 )
return 2;
else
return 3;
}
static int decode_cabac_mb_cbp_luma( H264Context *h) {
static int decode_cabac_mb_cbp_luma(H264Context *h, H264SliceContext *sl)
{
int cbp_b, cbp_a, ctx, cbp = 0;
cbp_a = h->left_cbp;
cbp_b = h->top_cbp;
ctx = !(cbp_a & 0x02) + 2 * !(cbp_b & 0x04);
cbp += get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]);
cbp += get_cabac_noinline(&sl->cabac, &sl->cabac_state[73 + ctx]);
ctx = !(cbp & 0x01) + 2 * !(cbp_b & 0x08);
cbp += get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 1;
cbp += get_cabac_noinline(&sl->cabac, &sl->cabac_state[73 + ctx]) << 1;
ctx = !(cbp_a & 0x08) + 2 * !(cbp & 0x01);
cbp += get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 2;
cbp += get_cabac_noinline(&sl->cabac, &sl->cabac_state[73 + ctx]) << 2;
ctx = !(cbp & 0x04) + 2 * !(cbp & 0x02);
cbp += get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 3;
cbp += get_cabac_noinline(&sl->cabac, &sl->cabac_state[73 + ctx]) << 3;
return cbp;
}
static int decode_cabac_mb_cbp_chroma( H264Context *h) {
static int decode_cabac_mb_cbp_chroma(H264Context *h, H264SliceContext *sl)
{
int ctx;
int cbp_a, cbp_b;
@ -1427,38 +1430,40 @@ 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_noinline( &h->cabac, &h->cabac_state[77 + ctx] ) == 0 )
if( get_cabac_noinline( &sl->cabac, &sl->cabac_state[77 + ctx] ) == 0 )
return 0;
ctx = 4;
if( cbp_a == 2 ) ctx++;
if( cbp_b == 2 ) ctx += 2;
return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] );
return 1 + get_cabac_noinline( &sl->cabac, &sl->cabac_state[77 + ctx] );
}
static int decode_cabac_p_mb_sub_type( H264Context *h ) {
if( get_cabac( &h->cabac, &h->cabac_state[21] ) )
static int decode_cabac_p_mb_sub_type(H264Context *h, H264SliceContext *sl)
{
if( get_cabac( &sl->cabac, &sl->cabac_state[21] ) )
return 0; /* 8x8 */
if( !get_cabac( &h->cabac, &h->cabac_state[22] ) )
if( !get_cabac( &sl->cabac, &sl->cabac_state[22] ) )
return 1; /* 8x4 */
if( get_cabac( &h->cabac, &h->cabac_state[23] ) )
if( get_cabac( &sl->cabac, &sl->cabac_state[23] ) )
return 2; /* 4x8 */
return 3; /* 4x4 */
}
static int decode_cabac_b_mb_sub_type( H264Context *h ) {
static int decode_cabac_b_mb_sub_type(H264Context *h, H264SliceContext *sl)
{
int type;
if( !get_cabac( &h->cabac, &h->cabac_state[36] ) )
if( !get_cabac( &sl->cabac, &sl->cabac_state[36] ) )
return 0; /* B_Direct_8x8 */
if( !get_cabac( &h->cabac, &h->cabac_state[37] ) )
return 1 + get_cabac( &h->cabac, &h->cabac_state[39] ); /* B_L0_8x8, B_L1_8x8 */
if( !get_cabac( &sl->cabac, &sl->cabac_state[37] ) )
return 1 + get_cabac( &sl->cabac, &sl->cabac_state[39] ); /* B_L0_8x8, B_L1_8x8 */
type = 3;
if( get_cabac( &h->cabac, &h->cabac_state[38] ) ) {
if( get_cabac( &h->cabac, &h->cabac_state[39] ) )
return 11 + get_cabac( &h->cabac, &h->cabac_state[39] ); /* B_L1_4x4, B_Bi_4x4 */
if( get_cabac( &sl->cabac, &sl->cabac_state[38] ) ) {
if( get_cabac( &sl->cabac, &sl->cabac_state[39] ) )
return 11 + get_cabac( &sl->cabac, &sl->cabac_state[39] ); /* B_L1_4x4, B_Bi_4x4 */
type += 4;
}
type += 2*get_cabac( &h->cabac, &h->cabac_state[39] );
type += get_cabac( &h->cabac, &h->cabac_state[39] );
type += 2*get_cabac( &sl->cabac, &sl->cabac_state[39] );
type += get_cabac( &sl->cabac, &sl->cabac_state[39] );
return type;
}
@ -1481,7 +1486,7 @@ static int decode_cabac_mb_ref(H264Context *h, H264SliceContext *sl, int list, i
ctx += 2;
}
while( get_cabac( &h->cabac, &h->cabac_state[54+ctx] ) ) {
while( get_cabac( &sl->cabac, &sl->cabac_state[54+ctx] ) ) {
ref++;
ctx = (ctx>>2)+4;
if(ref >= 32 /*h->ref_list[list]*/){
@ -1491,10 +1496,11 @@ static int decode_cabac_mb_ref(H264Context *h, H264SliceContext *sl, int list, i
return ref;
}
static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd, int *mvda) {
static int decode_cabac_mb_mvd(H264Context *h, H264SliceContext *sl, int ctxbase, int amvd, int *mvda)
{
int mvd;
if(!get_cabac(&h->cabac, &h->cabac_state[ctxbase+((amvd-3)>>(INT_BIT-1))+((amvd-33)>>(INT_BIT-1))+2])){
if(!get_cabac(&sl->cabac, &sl->cabac_state[ctxbase+((amvd-3)>>(INT_BIT-1))+((amvd-33)>>(INT_BIT-1))+2])){
// if(!get_cabac(&h->cabac, &h->cabac_state[ctxbase+(amvd>2)+(amvd>32)])){
*mvda= 0;
return 0;
@ -1502,7 +1508,7 @@ static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd, int *mvda
mvd= 1;
ctxbase+= 3;
while( mvd < 9 && get_cabac( &h->cabac, &h->cabac_state[ctxbase] ) ) {
while( mvd < 9 && get_cabac( &sl->cabac, &sl->cabac_state[ctxbase] ) ) {
if( mvd < 4 )
ctxbase++;
mvd++;
@ -1510,7 +1516,7 @@ static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd, int *mvda
if( mvd >= 9 ) {
int k = 3;
while( get_cabac_bypass( &h->cabac ) ) {
while( get_cabac_bypass( &sl->cabac ) ) {
mvd += 1 << k;
k++;
if(k>24){
@ -1519,12 +1525,12 @@ static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd, int *mvda
}
}
while( k-- ) {
mvd += get_cabac_bypass( &h->cabac )<<k;
mvd += get_cabac_bypass( &sl->cabac )<<k;
}
*mvda=mvd < 70 ? mvd : 70;
}else
*mvda=mvd;
return get_cabac_bypass_sign( &h->cabac, -mvd );
return get_cabac_bypass_sign( &sl->cabac, -mvd );
}
#define DECODE_CABAC_MB_MVD( h, list, n )\
@ -1534,8 +1540,8 @@ static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd, int *mvda
int amvd1 = h->mvd_cache[list][scan8[n] - 1][1] +\
h->mvd_cache[list][scan8[n] - 8][1];\
\
mx += decode_cabac_mb_mvd( h, 40, amvd0, &mpx );\
my += decode_cabac_mb_mvd( h, 47, amvd1, &mpy );\
mx += decode_cabac_mb_mvd(h, sl, 40, amvd0, &mpx);\
my += decode_cabac_mb_mvd(h, sl, 47, amvd1, &mpy);\
}
static av_always_inline int get_cabac_cbf_ctx(H264Context *h, H264SliceContext *sl,
@ -1631,19 +1637,19 @@ decode_cabac_residual_internal(H264Context *h, H264SliceContext *sl,
#ifdef CABAC_ON_STACK
#define CC &cc
CABACContext cc;
cc.range = h->cabac.range;
cc.low = h->cabac.low;
cc.bytestream= h->cabac.bytestream;
cc.bytestream_end = h->cabac.bytestream_end;
cc.range = sl->cabac.range;
cc.low = sl->cabac.low;
cc.bytestream= sl->cabac.bytestream;
cc.bytestream_end = sl->cabac.bytestream_end;
#else
#define CC &h->cabac
#define CC &sl->cabac
#endif
significant_coeff_ctx_base = h->cabac_state
significant_coeff_ctx_base = sl->cabac_state
+ significant_coeff_flag_offset[MB_FIELD(h)][cat];
last_coeff_ctx_base = h->cabac_state
last_coeff_ctx_base = sl->cabac_state
+ last_coeff_flag_offset[MB_FIELD(h)][cat];
abs_level_m1_ctx_base = h->cabac_state
abs_level_m1_ctx_base = sl->cabac_state
+ coeff_abs_level_m1_offset[cat];
if( !is_dc && max_coeff == 64 ) {
@ -1749,9 +1755,9 @@ decode_cabac_residual_internal(H264Context *h, H264SliceContext *sl,
STORE_BLOCK(int16_t)
}
#ifdef CABAC_ON_STACK
h->cabac.range = cc.range ;
h->cabac.low = cc.low ;
h->cabac.bytestream= cc.bytestream;
sl->cabac.range = cc.range ;
sl->cabac.low = cc.low ;
sl->cabac.bytestream= cc.bytestream;
#endif
}
@ -1807,7 +1813,7 @@ static av_always_inline void decode_cabac_residual_dc(H264Context *h,
int max_coeff)
{
/* read coded block flag */
if( get_cabac( &h->cabac, &h->cabac_state[get_cabac_cbf_ctx(h, sl, cat, n, max_coeff, 1)]) == 0 ) {
if( get_cabac( &sl->cabac, &sl->cabac_state[get_cabac_cbf_ctx(h, sl, cat, n, max_coeff, 1)]) == 0 ) {
sl->non_zero_count_cache[scan8[n]] = 0;
return;
}
@ -1821,7 +1827,7 @@ decode_cabac_residual_dc_422(H264Context *h, H264SliceContext *sl,
int max_coeff)
{
/* read coded block flag */
if (get_cabac(&h->cabac, &h->cabac_state[get_cabac_cbf_ctx(h, sl, cat, n, max_coeff, 1)]) == 0) {
if (get_cabac(&sl->cabac, &sl->cabac_state[get_cabac_cbf_ctx(h, sl, cat, n, max_coeff, 1)]) == 0) {
sl->non_zero_count_cache[scan8[n]] = 0;
return;
}
@ -1837,7 +1843,7 @@ static av_always_inline void decode_cabac_residual_nondc(H264Context *h,
int max_coeff)
{
/* read coded block flag */
if( (cat != 5 || CHROMA444(h)) && get_cabac( &h->cabac, &h->cabac_state[get_cabac_cbf_ctx(h, sl, cat, n, max_coeff, 0)]) == 0) {
if( (cat != 5 || CHROMA444(h)) && get_cabac( &sl->cabac, &sl->cabac_state[get_cabac_cbf_ctx(h, sl, cat, n, max_coeff, 0)]) == 0) {
if( max_coeff == 64 ) {
fill_rectangle(&sl->non_zero_count_cache[scan8[n]], 2, 2, 8, 0, 1);
} else {
@ -1956,16 +1962,16 @@ int ff_h264_decode_mb_cabac(H264Context *h, H264SliceContext *sl)
if (!IS_DIRECT(sl->top_type - 1))
ctx++;
if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+ctx] ) ){
if( !get_cabac_noinline( &sl->cabac, &sl->cabac_state[27+ctx] ) ){
mb_type= 0; /* B_Direct_16x16 */
}else if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+3] ) ) {
mb_type= 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ); /* B_L[01]_16x16 */
}else if( !get_cabac_noinline( &sl->cabac, &sl->cabac_state[27+3] ) ) {
mb_type= 1 + get_cabac_noinline( &sl->cabac, &sl->cabac_state[27+5] ); /* B_L[01]_16x16 */
}else{
int bits;
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] );
bits = get_cabac_noinline( &sl->cabac, &sl->cabac_state[27+4] ) << 3;
bits+= get_cabac_noinline( &sl->cabac, &sl->cabac_state[27+5] ) << 2;
bits+= get_cabac_noinline( &sl->cabac, &sl->cabac_state[27+5] ) << 1;
bits+= get_cabac_noinline( &sl->cabac, &sl->cabac_state[27+5] );
if( bits < 8 ){
mb_type= bits + 3; /* B_Bi_16x16 through B_L1_L0_16x8 */
}else if( bits == 13 ){
@ -1976,21 +1982,21 @@ int ff_h264_decode_mb_cabac(H264Context *h, H264SliceContext *sl)
}else if( bits == 15 ){
mb_type= 22; /* B_8x8 */
}else{
bits= ( bits<<1 ) + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
bits= ( bits<<1 ) + get_cabac_noinline( &sl->cabac, &sl->cabac_state[27+5] );
mb_type= bits - 4; /* B_L0_Bi_* through B_Bi_Bi_* */
}
}
partition_count= b_mb_type_info[mb_type].partition_count;
mb_type= b_mb_type_info[mb_type].type;
} else if (sl->slice_type_nos == AV_PICTURE_TYPE_P) {
if( get_cabac_noinline( &h->cabac, &h->cabac_state[14] ) == 0 ) {
if( get_cabac_noinline( &sl->cabac, &sl->cabac_state[14] ) == 0 ) {
/* P-type */
if( get_cabac_noinline( &h->cabac, &h->cabac_state[15] ) == 0 ) {
if( get_cabac_noinline( &sl->cabac, &sl->cabac_state[15] ) == 0 ) {
/* P_L0_D16x16, P_8x8 */
mb_type= 3 * get_cabac_noinline( &h->cabac, &h->cabac_state[16] );
mb_type= 3 * get_cabac_noinline( &sl->cabac, &sl->cabac_state[16] );
} else {
/* P_L0_D8x16, P_L0_D16x8 */
mb_type= 2 - get_cabac_noinline( &h->cabac, &h->cabac_state[17] );
mb_type= 2 - get_cabac_noinline( &sl->cabac, &sl->cabac_state[17] );
}
partition_count= p_mb_type_info[mb_type].partition_count;
mb_type= p_mb_type_info[mb_type].type;
@ -2022,19 +2028,19 @@ decode_intra_mb:
// We assume these blocks are very rare so we do not optimize it.
// FIXME The two following lines get the bitstream position in the cabac
// decode, I think it should be done by a function in cabac.h (or cabac.c).
ptr= h->cabac.bytestream;
if(h->cabac.low&0x1) ptr--;
ptr= sl->cabac.bytestream;
if(sl->cabac.low&0x1) ptr--;
if(CABAC_BITS==16){
if(h->cabac.low&0x1FF) ptr--;
if(sl->cabac.low&0x1FF) ptr--;
}
// The pixels are stored in the same order as levels in h->mb array.
if ((int) (h->cabac.bytestream_end - ptr) < mb_size)
if ((int) (sl->cabac.bytestream_end - ptr) < mb_size)
return -1;
sl->intra_pcm_ptr = ptr;
ptr += mb_size;
ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);
ff_init_cabac_decoder(&sl->cabac, ptr, sl->cabac.bytestream_end - ptr);
// All blocks are present
h->cbp_table[mb_xy] = 0xf7ef;
@ -2053,17 +2059,17 @@ decode_intra_mb:
if( IS_INTRA( mb_type ) ) {
int i, pred_mode;
if( IS_INTRA4x4( mb_type ) ) {
if (dct8x8_allowed && get_cabac_noinline(&h->cabac, &h->cabac_state[399 + sl->neighbor_transform_size])) {
if (dct8x8_allowed && get_cabac_noinline(&sl->cabac, &sl->cabac_state[399 + sl->neighbor_transform_size])) {
mb_type |= MB_TYPE_8x8DCT;
for( i = 0; i < 16; i+=4 ) {
int pred = pred_intra_mode(h, sl, i);
int mode = decode_cabac_mb_intra4x4_pred_mode( h, pred );
int mode = decode_cabac_mb_intra4x4_pred_mode(h, sl, pred);
fill_rectangle(&sl->intra4x4_pred_mode_cache[scan8[i]], 2, 2, 8, mode, 1);
}
} else {
for( i = 0; i < 16; i++ ) {
int pred = pred_intra_mode(h, sl, i);
sl->intra4x4_pred_mode_cache[scan8[i]] = decode_cabac_mb_intra4x4_pred_mode(h, pred);
sl->intra4x4_pred_mode_cache[scan8[i]] = decode_cabac_mb_intra4x4_pred_mode(h, sl, pred);
av_dlog(h->avctx, "i4x4 pred=%d mode=%d\n", pred,
h->intra4x4_pred_mode_cache[scan8[i]]);
@ -2090,7 +2096,7 @@ decode_intra_mb:
if (sl->slice_type_nos == AV_PICTURE_TYPE_B ) {
for( i = 0; i < 4; i++ ) {
sl->sub_mb_type[i] = decode_cabac_b_mb_sub_type( h );
sl->sub_mb_type[i] = decode_cabac_b_mb_sub_type(h, sl);
sub_partition_count[i] = b_sub_mb_type_info[sl->sub_mb_type[i]].partition_count;
sl->sub_mb_type[i] = b_sub_mb_type_info[sl->sub_mb_type[i]].type;
}
@ -2106,7 +2112,7 @@ decode_intra_mb:
}
} else {
for( i = 0; i < 4; i++ ) {
sl->sub_mb_type[i] = decode_cabac_p_mb_sub_type(h);
sl->sub_mb_type[i] = decode_cabac_p_mb_sub_type(h, sl);
sub_partition_count[i] = p_sub_mb_type_info[sl->sub_mb_type[i]].partition_count;
sl->sub_mb_type[i] = p_sub_mb_type_info[sl->sub_mb_type[i]].type;
}
@ -2304,15 +2310,15 @@ decode_intra_mb:
}
if( !IS_INTRA16x16( mb_type ) ) {
cbp = decode_cabac_mb_cbp_luma( h );
cbp = decode_cabac_mb_cbp_luma(h, sl);
if(decode_chroma)
cbp |= decode_cabac_mb_cbp_chroma( h ) << 4;
cbp |= decode_cabac_mb_cbp_chroma(h, sl) << 4;
}
h->cbp_table[mb_xy] = h->cbp = cbp;
if( dct8x8_allowed && (cbp&15) && !IS_INTRA( mb_type ) ) {
mb_type |= MB_TYPE_8x8DCT * get_cabac_noinline(&h->cabac, &h->cabac_state[399 + sl->neighbor_transform_size]);
mb_type |= MB_TYPE_8x8DCT * get_cabac_noinline(&sl->cabac, &sl->cabac_state[399 + sl->neighbor_transform_size]);
}
/* It would be better to do this in fill_decode_caches, but we don't know
@ -2352,12 +2358,12 @@ decode_intra_mb:
}
// decode_cabac_mb_dqp
if(get_cabac_noinline( &h->cabac, &h->cabac_state[60 + (h->last_qscale_diff != 0)])){
if(get_cabac_noinline( &sl->cabac, &sl->cabac_state[60 + (h->last_qscale_diff != 0)])){
int val = 1;
int ctx= 2;
const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
while( get_cabac_noinline( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
while( get_cabac_noinline( &sl->cabac, &sl->cabac_state[60 + ctx] ) ) {
ctx= 3;
val++;
if(val > 2*max_qp){ //prevent infinite loop

10
libavcodec/h264_slice.c
View File

@ -2194,7 +2194,7 @@ static int decode_slice(struct AVCodecContext *avctx, void *arg)
align_get_bits(&h->gb);
/* init cabac */
ff_init_cabac_decoder(&h->cabac,
ff_init_cabac_decoder(&sl->cabac,
h->gb.buffer + get_bits_count(&h->gb) / 8,
(get_bits_left(&h->gb) + 7) / 8);
@ -2219,21 +2219,21 @@ static int decode_slice(struct AVCodecContext *avctx, void *arg)
ff_h264_hl_decode_mb(h, sl);
h->mb_y--;
}
eos = get_cabac_terminate(&h->cabac);
eos = get_cabac_terminate(&sl->cabac);
if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
h->cabac.bytestream > h->cabac.bytestream_end + 2) {
sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
er_add_slice(h, sl, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
h->mb_y, ER_MB_END);
if (h->mb_x >= lf_x_start)
loop_filter(h, sl, lf_x_start, h->mb_x + 1);
return 0;
}
if (ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
if (ret < 0 || sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
av_log(h->avctx, AV_LOG_ERROR,
"error while decoding MB %d %d, bytestream %td\n",
h->mb_x, h->mb_y,
h->cabac.bytestream_end - h->cabac.bytestream);
sl->cabac.bytestream_end - sl->cabac.bytestream);
er_add_slice(h, sl, h->resync_mb_x, h->resync_mb_y, h->mb_x,
h->mb_y, ER_MB_ERROR);
return AVERROR_INVALIDDATA;