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Factor out init_scan_tables(), patch by Andreas Öman %andreas A olebyn.nu% 

original thread:
Date: Jun 15, 2007 10:10 PM
Subject: [FFmpeg-devel] [PATCH] h264 parallelized, (was: Parallelized h264 proof-of-concept)

Originally committed as revision 9341 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Andreas Öman 2007-06-16 19:54:04 +00:00 committed by Guillaume Poirier
parent f4a02f6e9b
commit b41c1db38d
1 changed files with 50 additions and 44 deletions
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94
libavcodec/h264.c
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@ -4153,6 +4153,55 @@ static int init_poc(H264Context *h){
return 0;
}
/**
* initialize scan tables
*/
static void init_scan_tables(H264Context *h){
MpegEncContext * const s = &h->s;
int i;
if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
memcpy(h-> field_scan, field_scan, 16*sizeof(uint8_t));
}else{
for(i=0; i<16; i++){
#define T(x) (x>>2) | ((x<<2) & 0xF)
h->zigzag_scan[i] = T(zigzag_scan[i]);
h-> field_scan[i] = T( field_scan[i]);
#undef T
}
}
if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
memcpy(h->zigzag_scan8x8, zigzag_scan8x8, 64*sizeof(uint8_t));
memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
memcpy(h->field_scan8x8, field_scan8x8, 64*sizeof(uint8_t));
memcpy(h->field_scan8x8_cavlc, field_scan8x8_cavlc, 64*sizeof(uint8_t));
}else{
for(i=0; i<64; i++){
#define T(x) (x>>3) | ((x&7)<<3)
h->zigzag_scan8x8[i] = T(zigzag_scan8x8[i]);
h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
h->field_scan8x8[i] = T(field_scan8x8[i]);
h->field_scan8x8_cavlc[i] = T(field_scan8x8_cavlc[i]);
#undef T
}
}
if(h->sps.transform_bypass){ //FIXME same ugly
h->zigzag_scan_q0 = zigzag_scan;
h->zigzag_scan8x8_q0 = zigzag_scan8x8;
h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
h->field_scan_q0 = field_scan;
h->field_scan8x8_q0 = field_scan8x8;
h->field_scan8x8_cavlc_q0 = field_scan8x8_cavlc;
}else{
h->zigzag_scan_q0 = h->zigzag_scan;
h->zigzag_scan8x8_q0 = h->zigzag_scan8x8;
h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
h->field_scan_q0 = h->field_scan;
h->field_scan8x8_q0 = h->field_scan8x8;
h->field_scan8x8_cavlc_q0 = h->field_scan8x8_cavlc;
}
}
/**
* decodes a slice header.
* this will allso call MPV_common_init() and frame_start() as needed
@ -4239,50 +4288,7 @@ static int decode_slice_header(H264Context *h){
if (MPV_common_init(s) < 0)
return -1;
if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
memcpy(h-> field_scan, field_scan, 16*sizeof(uint8_t));
}else{
int i;
for(i=0; i<16; i++){
#define T(x) (x>>2) | ((x<<2) & 0xF)
h->zigzag_scan[i] = T(zigzag_scan[i]);
h-> field_scan[i] = T( field_scan[i]);
#undef T
}
}
if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
memcpy(h->zigzag_scan8x8, zigzag_scan8x8, 64*sizeof(uint8_t));
memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
memcpy(h->field_scan8x8, field_scan8x8, 64*sizeof(uint8_t));
memcpy(h->field_scan8x8_cavlc, field_scan8x8_cavlc, 64*sizeof(uint8_t));
}else{
int i;
for(i=0; i<64; i++){
#define T(x) (x>>3) | ((x&7)<<3)
h->zigzag_scan8x8[i] = T(zigzag_scan8x8[i]);
h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
h->field_scan8x8[i] = T(field_scan8x8[i]);
h->field_scan8x8_cavlc[i] = T(field_scan8x8_cavlc[i]);
#undef T
}
}
if(h->sps.transform_bypass){ //FIXME same ugly
h->zigzag_scan_q0 = zigzag_scan;
h->zigzag_scan8x8_q0 = zigzag_scan8x8;
h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
h->field_scan_q0 = field_scan;
h->field_scan8x8_q0 = field_scan8x8;
h->field_scan8x8_cavlc_q0 = field_scan8x8_cavlc;
}else{
h->zigzag_scan_q0 = h->zigzag_scan;
h->zigzag_scan8x8_q0 = h->zigzag_scan8x8;
h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
h->field_scan_q0 = h->field_scan;
h->field_scan8x8_q0 = h->field_scan8x8;
h->field_scan8x8_cavlc_q0 = h->field_scan8x8_cavlc;
}
init_scan_tables(h);
alloc_tables(h);
s->avctx->width = s->width;