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authorJason Garrett-Glaser <jason@x264.com>2011-06-03 01:12:28 -0700
committerJason Garrett-Glaser <jason@x264.com>2011-06-13 12:21:39 -0700
commitc9c493872c385cff304438ee404e38e55f04af28 (patch)
tree4c0ee47f9c0c4a00d63423a84a5f30bf2e3b0a92 /libavcodec/h264_cavlc.c
parent25f05ddb1af4bd398fa92cd135e48fafe23bd92a (diff)
downloadffmpeg-c9c493872c385cff304438ee404e38e55f04af28.tar.gz
4:4:4 H.264 decoding support
Note: this is 4:4:4 from the 2007 spec revision, not the previous (now deprecated) 4:4:4 mode in H.264.
Diffstat (limited to 'libavcodec/h264_cavlc.c')
-rw-r--r--libavcodec/h264_cavlc.c198
1 files changed, 117 insertions, 81 deletions
diff --git a/libavcodec/h264_cavlc.c b/libavcodec/h264_cavlc.c
index 2e5ea54679..497166b423 100644
--- a/libavcodec/h264_cavlc.c
+++ b/libavcodec/h264_cavlc.c
@@ -371,12 +371,12 @@ static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, in
//FIXME put trailing_onex into the context
- if(n >= CHROMA_DC_BLOCK_INDEX){
+ if(max_coeff <= 8){
coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
total_coeff= coeff_token>>2;
}else{
- if(n == LUMA_DC_BLOCK_INDEX){
- total_coeff= pred_non_zero_count(h, 0);
+ if(n >= LUMA_DC_BLOCK_INDEX){
+ total_coeff= pred_non_zero_count(h, (n - LUMA_DC_BLOCK_INDEX)*16);
coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
total_coeff= coeff_token>>2;
}else{
@@ -482,7 +482,8 @@ static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, in
if(total_coeff == max_coeff)
zeros_left=0;
else{
- if(n >= CHROMA_DC_BLOCK_INDEX)
+ /* FIXME: we don't actually support 4:2:2 yet. */
+ if(max_coeff <= 8)
zeros_left= get_vlc2(gb, (chroma_dc_total_zeros_vlc-1)[ total_coeff ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
else
zeros_left= get_vlc2(gb, (total_zeros_vlc-1)[ total_coeff ].table, TOTAL_ZEROS_VLC_BITS, 1);
@@ -536,12 +537,80 @@ static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, in
return 0;
}
+static av_always_inline int decode_luma_residual(H264Context *h, GetBitContext *gb, const uint8_t *scan, const uint8_t *scan8x8, int pixel_shift, int mb_type, int cbp, int p){
+ int i4x4, i8x8;
+ MpegEncContext * const s = &h->s;
+ int qscale = p == 0 ? s->qscale : h->chroma_qp[p-1];
+ if(IS_INTRA16x16(mb_type)){
+ AV_ZERO128(h->mb_luma_dc[p]+0);
+ AV_ZERO128(h->mb_luma_dc[p]+8);
+ AV_ZERO128(h->mb_luma_dc[p]+16);
+ AV_ZERO128(h->mb_luma_dc[p]+24);
+ if( decode_residual(h, h->intra_gb_ptr, h->mb_luma_dc[p], LUMA_DC_BLOCK_INDEX+p, scan, NULL, 16) < 0){
+ return -1; //FIXME continue if partitioned and other return -1 too
+ }
+
+ assert((cbp&15) == 0 || (cbp&15) == 15);
+
+ if(cbp&15){
+ for(i8x8=0; i8x8<4; i8x8++){
+ for(i4x4=0; i4x4<4; i4x4++){
+ const int index= i4x4 + 4*i8x8 + p*16;
+ if( decode_residual(h, h->intra_gb_ptr, h->mb + (16*index << pixel_shift),
+ index, scan + 1, h->dequant4_coeff[p][qscale], 15) < 0 ){
+ return -1;
+ }
+ }
+ }
+ return 0xf;
+ }else{
+ fill_rectangle(&h->non_zero_count_cache[scan8[p*16]], 4, 4, 8, 0, 1);
+ return 0;
+ }
+ }else{
+ int cqm = (IS_INTRA( mb_type ) ? 0:3)+p;
+ /* For CAVLC 4:4:4, we need to keep track of the luma 8x8 CBP for deblocking nnz purposes. */
+ int new_cbp = 0;
+ for(i8x8=0; i8x8<4; i8x8++){
+ if(cbp & (1<<i8x8)){
+ if(IS_8x8DCT(mb_type)){
+ DCTELEM *buf = &h->mb[64*i8x8+256*p << pixel_shift];
+ uint8_t *nnz;
+ for(i4x4=0; i4x4<4; i4x4++){
+ const int index= i4x4 + 4*i8x8 + p*16;
+ if( decode_residual(h, gb, buf, index, scan8x8+16*i4x4,
+ h->dequant8_coeff[cqm][qscale], 16) < 0 )
+ return -1;
+ }
+ nnz= &h->non_zero_count_cache[ scan8[4*i8x8+p*16] ];
+ nnz[0] += nnz[1] + nnz[8] + nnz[9];
+ new_cbp |= !!nnz[0] << i8x8;
+ }else{
+ for(i4x4=0; i4x4<4; i4x4++){
+ const int index= i4x4 + 4*i8x8 + p*16;
+ if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index,
+ scan, h->dequant4_coeff[cqm][qscale], 16) < 0 ){
+ return -1;
+ }
+ new_cbp |= h->non_zero_count_cache[ scan8[index] ] << i8x8;
+ }
+ }
+ }else{
+ uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8+p*16] ];
+ nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
+ }
+ }
+ return new_cbp;
+ }
+}
+
int ff_h264_decode_mb_cavlc(H264Context *h){
MpegEncContext * const s = &h->s;
int mb_xy;
int partition_count;
unsigned int mb_type, cbp;
int dct8x8_allowed= h->pps.transform_8x8_mode;
+ int decode_chroma = h->sps.chroma_format_idc == 1 || h->sps.chroma_format_idc == 2;
const int pixel_shift = h->pixel_shift;
mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
@@ -608,19 +677,21 @@ decode_intra_mb:
if(IS_INTRA_PCM(mb_type)){
unsigned int x;
+ static const uint16_t mb_sizes[4] = {256,384,512,768};
+ const int mb_size = mb_sizes[h->sps.chroma_format_idc]*h->sps.bit_depth_luma >> 3;
// We assume these blocks are very rare so we do not optimize it.
align_get_bits(&s->gb);
// The pixels are stored in the same order as levels in h->mb array.
- for(x=0; x < (CHROMA ? 384 : 256)*h->sps.bit_depth_luma/8; x++){
+ for(x=0; x < mb_size; x++){
((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8);
}
// In deblocking, the quantizer is 0
s->current_picture.qscale_table[mb_xy]= 0;
// All coeffs are present
- memset(h->non_zero_count[mb_xy], 16, 32);
+ memset(h->non_zero_count[mb_xy], 16, 48);
s->current_picture.mb_type[mb_xy]= mb_type;
return 0;
@@ -668,7 +739,7 @@ decode_intra_mb:
if(h->intra16x16_pred_mode < 0)
return -1;
}
- if(CHROMA){
+ if(decode_chroma){
pred_mode= ff_h264_check_intra_pred_mode(h, get_ue_golomb_31(&s->gb));
if(pred_mode < 0)
return -1;
@@ -896,15 +967,19 @@ decode_intra_mb:
if(!IS_INTRA16x16(mb_type)){
cbp= get_ue_golomb(&s->gb);
- if(cbp > 47){
- av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y);
- return -1;
- }
- if(CHROMA){
+ if(decode_chroma){
+ if(cbp > 47){
+ av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y);
+ return -1;
+ }
if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp];
else cbp= golomb_to_inter_cbp [cbp];
}else{
+ if(cbp > 15){
+ av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y);
+ return -1;
+ }
if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp];
else cbp= golomb_to_inter_cbp_gray[cbp];
}
@@ -918,8 +993,9 @@ decode_intra_mb:
s->current_picture.mb_type[mb_xy]= mb_type;
if(cbp || IS_INTRA16x16(mb_type)){
- int i8x8, i4x4, chroma_idx;
+ int i4x4, chroma_idx;
int dquant;
+ int ret;
GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr;
const uint8_t *scan, *scan8x8;
const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
@@ -947,85 +1023,45 @@ decode_intra_mb:
h->chroma_qp[0]= get_chroma_qp(h, 0, s->qscale);
h->chroma_qp[1]= get_chroma_qp(h, 1, s->qscale);
- if(IS_INTRA16x16(mb_type)){
- AV_ZERO128(h->mb_luma_dc+0);
- AV_ZERO128(h->mb_luma_dc+8);
- AV_ZERO128(h->mb_luma_dc+16);
- AV_ZERO128(h->mb_luma_dc+24);
- if( decode_residual(h, h->intra_gb_ptr, h->mb_luma_dc, LUMA_DC_BLOCK_INDEX, scan, h->dequant4_coeff[0][s->qscale], 16) < 0){
- return -1; //FIXME continue if partitioned and other return -1 too
- }
- assert((cbp&15) == 0 || (cbp&15) == 15);
+ if( (ret = decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 0)) < 0 ){
+ return -1;
+ }
+ h->cbp_table[mb_xy] |= ret << 12;
+ if(CHROMA444){
+ if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 1) < 0 ){
+ return -1;
+ }
+ if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 2) < 0 ){
+ return -1;
+ }
+ } else {
+ if(cbp&0x30){
+ for(chroma_idx=0; chroma_idx<2; chroma_idx++)
+ if( decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift), CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma_dc_scan, NULL, 4) < 0){
+ return -1;
+ }
+ }
- if(cbp&15){
- for(i8x8=0; i8x8<4; i8x8++){
+ if(cbp&0x20){
+ for(chroma_idx=0; chroma_idx<2; chroma_idx++){
+ const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]];
for(i4x4=0; i4x4<4; i4x4++){
- const int index= i4x4 + 4*i8x8;
- if( decode_residual(h, h->intra_gb_ptr, h->mb + (16*index << pixel_shift), index, scan + 1, h->dequant4_coeff[0][s->qscale], 15) < 0 ){
+ const int index= 16 + 16*chroma_idx + i4x4;
+ if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index, scan + 1, qmul, 15) < 0){
return -1;
}
}
}
}else{
- fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
+ fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
+ fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
}
- }else{
- for(i8x8=0; i8x8<4; i8x8++){
- if(cbp & (1<<i8x8)){
- if(IS_8x8DCT(mb_type)){
- DCTELEM *buf = &h->mb[64*i8x8 << pixel_shift];
- uint8_t *nnz;
- for(i4x4=0; i4x4<4; i4x4++){
- if( decode_residual(h, gb, buf, i4x4+4*i8x8, scan8x8+16*i4x4,
- h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 16) <0 )
- return -1;
- }
- nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
- nnz[0] += nnz[1] + nnz[8] + nnz[9];
- }else{
- for(i4x4=0; i4x4<4; i4x4++){
- const int index= i4x4 + 4*i8x8;
-
- if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index, scan, h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale], 16) <0 ){
- return -1;
- }
- }
- }
- }else{
- uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
- nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
- }
- }
- }
-
- if(cbp&0x30){
- for(chroma_idx=0; chroma_idx<2; chroma_idx++)
- if( decode_residual(h, gb, h->mb + ((256 + 16*4*chroma_idx) << pixel_shift), CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma_dc_scan, NULL, 4) < 0){
- return -1;
- }
- }
-
- if(cbp&0x20){
- for(chroma_idx=0; chroma_idx<2; chroma_idx++){
- const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]];
- for(i4x4=0; i4x4<4; i4x4++){
- const int index= 16 + 4*chroma_idx + i4x4;
- if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index, scan + 1, qmul, 15) < 0){
- return -1;
- }
- }
- }
- }else{
- uint8_t * const nnz= &h->non_zero_count_cache[0];
- nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
- nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
}
}else{
- uint8_t * const nnz= &h->non_zero_count_cache[0];
- fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
- nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
- nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
+ fill_rectangle(&h->non_zero_count_cache[scan8[ 0]], 4, 4, 8, 0, 1);
+ fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
+ fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
}
s->current_picture.qscale_table[mb_xy]= s->qscale;
write_back_non_zero_count(h);