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h264 optimization: common case hl_decode_mb patch by (Alexander Strange astrange ithinksw com) 

144095->142319 dezicycles for hl_decode_mb() on duron
trailing whitespace removed by me

Originally committed as revision 8106 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Alexander Strange Michael Niedermayer 19 years ago
parent
65a455a879
commit
bd91fee3d7
1 changed files with 46 additions and 19 deletions
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  1. +46
    -19
      libavcodec/h264.c

+ 46
- 19
libavcodec/h264.c View File

@@ -3497,7 +3497,7 @@ b= t;
}
}

static void hl_decode_mb(H264Context *h){
static void av_always_inline hl_decode_mb_internal(H264Context *h, int simple){
MpegEncContext * const s = &h->s;
const int mb_x= s->mb_x;
const int mb_y= s->mb_y;
@@ -3508,13 +3508,10 @@ static void hl_decode_mb(H264Context *h){
int i;
int *block_offset = &h->block_offset[0];
const unsigned int bottom = mb_y & 1;
const int transform_bypass = (s->qscale == 0 && h->sps.transform_bypass);
const int transform_bypass = (s->qscale == 0 && h->sps.transform_bypass), is_h264 = (simple || s->codec_id == CODEC_ID_H264);
void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);

if(!s->decode)
return;

dest_y = s->current_picture.data[0] + (mb_y * 16* s->linesize ) + mb_x * 16;
dest_cb = s->current_picture.data[1] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
dest_cr = s->current_picture.data[2] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
@@ -3522,7 +3519,7 @@ static void hl_decode_mb(H264Context *h){
s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);

if (MB_FIELD) {
if (!simple && MB_FIELD) {
linesize = h->mb_linesize = s->linesize * 2;
uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
block_offset = &h->block_offset[24];
@@ -3566,7 +3563,7 @@ static void hl_decode_mb(H264Context *h){
idct_add = s->dsp.h264_idct_add;
}

if(FRAME_MBAFF && h->deblocking_filter && IS_INTRA(mb_type)
if(!simple && FRAME_MBAFF && h->deblocking_filter && IS_INTRA(mb_type)
&& (!bottom || !IS_INTRA(s->current_picture.mb_type[mb_xy-s->mb_stride]))){
int mbt_y = mb_y&~1;
uint8_t *top_y = s->current_picture.data[0] + (mbt_y * 16* s->linesize ) + mb_x * 16;
@@ -3575,7 +3572,7 @@ static void hl_decode_mb(H264Context *h){
xchg_pair_border(h, top_y, top_cb, top_cr, s->linesize, s->uvlinesize, 1);
}

if (IS_INTRA_PCM(mb_type)) {
if (!simple && IS_INTRA_PCM(mb_type)) {
unsigned int x, y;

// The pixels are stored in h->mb array in the same order as levels,
@@ -3603,16 +3600,16 @@ static void hl_decode_mb(H264Context *h){
}
} else {
if(IS_INTRA(mb_type)){
if(h->deblocking_filter && !FRAME_MBAFF)
if(h->deblocking_filter && (simple || !FRAME_MBAFF))
xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1);

if(!(s->flags&CODEC_FLAG_GRAY)){
if(simple || !(s->flags&CODEC_FLAG_GRAY)){
h->pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
h->pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
}

if(IS_INTRA4x4(mb_type)){
if(!s->encoding){
if(simple || !s->encoding){
if(IS_8x8DCT(mb_type)){
for(i=0; i<16; i+=4){
uint8_t * const ptr= dest_y + block_offset[i];
@@ -3648,7 +3645,7 @@ static void hl_decode_mb(H264Context *h){
h->pred4x4[ dir ](ptr, topright, linesize);
nnz = h->non_zero_count_cache[ scan8[i] ];
if(nnz){
if(s->codec_id == CODEC_ID_H264){
if(is_h264){
if(nnz == 1 && h->mb[i*16])
idct_dc_add(ptr, h->mb + i*16, linesize);
else
@@ -3660,15 +3657,15 @@ static void hl_decode_mb(H264Context *h){
}
}else{
h->pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
if(s->codec_id == CODEC_ID_H264){
if(is_h264){
if(!transform_bypass)
h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[IS_INTRA(mb_type) ? 0:3][s->qscale][0]);
}else
svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
}
if(h->deblocking_filter && !FRAME_MBAFF)
if(h->deblocking_filter && (simple || !FRAME_MBAFF))
xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
}else if(s->codec_id == CODEC_ID_H264){
}else if(is_h264){
hl_motion(h, dest_y, dest_cb, dest_cr,
s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
@@ -3677,7 +3674,7 @@ static void hl_decode_mb(H264Context *h){


if(!IS_INTRA4x4(mb_type)){
if(s->codec_id == CODEC_ID_H264){
if(is_h264){
if(IS_INTRA16x16(mb_type)){
for(i=0; i<16; i++){
if(h->non_zero_count_cache[ scan8[i] ])
@@ -3707,7 +3704,7 @@ static void hl_decode_mb(H264Context *h){
}
}

if(!(s->flags&CODEC_FLAG_GRAY)){
if(simple || !(s->flags&CODEC_FLAG_GRAY)){
uint8_t *dest[2] = {dest_cb, dest_cr};
if(transform_bypass){
idct_add = idct_dc_add = s->dsp.add_pixels4;
@@ -3717,7 +3714,7 @@ static void hl_decode_mb(H264Context *h){
chroma_dc_dequant_idct_c(h->mb + 16*16, h->chroma_qp, h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp][0]);
chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->chroma_qp, h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp][0]);
}
if(s->codec_id == CODEC_ID_H264){
if(is_h264){
for(i=16; i<16+8; i++){
if(h->non_zero_count_cache[ scan8[i] ])
idct_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
@@ -3735,7 +3732,7 @@ static void hl_decode_mb(H264Context *h){
}
}
if(h->deblocking_filter) {
if (FRAME_MBAFF) {
if (!simple && FRAME_MBAFF) {
//FIXME try deblocking one mb at a time?
// the reduction in load/storing mvs and such might outweigh the extra backup/xchg_border
const int mb_y = s->mb_y - 1;
@@ -3774,6 +3771,36 @@ static void hl_decode_mb(H264Context *h){
}
}

/**
* Process a macroblock; this case avoids checks for expensive uncommon cases.
*/
static void hl_decode_mb_simple(H264Context *h){
hl_decode_mb_internal(h, 1);
}

/**
* Process a macroblock; this handles edge cases, such as interlacing.
*/
static void av_noinline hl_decode_mb_complex(H264Context *h){
hl_decode_mb_internal(h, 0);
}

static void hl_decode_mb(H264Context *h){
MpegEncContext * const s = &h->s;
const int mb_x= s->mb_x;
const int mb_y= s->mb_y;
const int mb_xy= mb_x + mb_y*s->mb_stride;
const int mb_type= s->current_picture.mb_type[mb_xy];
int is_complex = FRAME_MBAFF || MB_FIELD || IS_INTRA_PCM(mb_type) || s->codec_id != CODEC_ID_H264 || (s->flags&CODEC_FLAG_GRAY) || s->encoding;

if(!s->decode)
return;

if (is_complex)
hl_decode_mb_complex(h);
else hl_decode_mb_simple(h);
}

/**
* fills the default_ref_list.
*/


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