From b41c1db38def6c16a164d92a9fd55af2155fff5c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20=C3=96man?= <andreas@olebyn.nu>
Date: Sat, 16 Jun 2007 19:54:04 +0000
Subject: [PATCH] =?UTF-8?q?Factor=20out=20init=5Fscan=5Ftables(),=20patch?=
=?UTF-8?q?=20by=20Andreas=20=C3=96man=20%andreas=20A=20olebyn.nu%=20origi?=
=?UTF-8?q?nal=20thread:=20Date:=20Jun=2015,=202007=2010:10=20PM=20Subject?=
=?UTF-8?q?:=20[FFmpeg-devel]=20[PATCH]=20h264=20parallelized,=20(was:=20P?=
=?UTF-8?q?arallelized=20h264=20proof-of-concept)?=
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Originally committed as revision 9341 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/h264.c | 94 +++++++++++++++++++++++++----------------------
1 file changed, 50 insertions(+), 44 deletions(-)
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index dde4dfb874e..8b499df6b30 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -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;
--
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