approximate qpel functions: sacrifice some quality for some decoding speed. enabled on B-frames with -lavdopts fast.

Originally committed as revision 6412 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 57 insertions, 0 deletions

diff --git a/libavcodec/i386/dsputil_mmx.c b/libavcodec/i386/dsputil_mmx.c
index 09a7e1e1b8..6ec808e9bd 100644
--- a/libavcodec/i386/dsputil_mmx.c
+++ b/libavcodec/i386/dsputil_mmx.c
@@ -2400,6 +2400,53 @@ QPEL_OP(put_       , ff_pw_16, _       , PUT_OP, mmx2)
 QPEL_OP(avg_       , ff_pw_16, _       , AVG_MMX2_OP, mmx2)
 QPEL_OP(put_no_rnd_, ff_pw_15, _no_rnd_, PUT_OP, mmx2)
 
+/***********************************/
+/* bilinear qpel: not compliant to any spec, only for -lavdopts fast */
+
+#define QPEL_2TAP_XY(OPNAME, SIZE, MMX, XY, HPEL)\
+static void OPNAME ## 2tap_qpel ## SIZE ## _mc ## XY ## _ ## MMX(uint8_t *dst, uint8_t *src, int stride){\
+    OPNAME ## pixels ## SIZE ## HPEL(dst, src, stride, SIZE);\
+}
+#define QPEL_2TAP_L3(OPNAME, SIZE, MMX, XY, S0, S1, S2)\
+static void OPNAME ## 2tap_qpel ## SIZE ## _mc ## XY ## _ ## MMX(uint8_t *dst, uint8_t *src, int stride){\
+    OPNAME ## 2tap_qpel ## SIZE ## _l3_ ## MMX(dst, src+S0, stride, SIZE, S1, S2);\
+}
+
+#define QPEL_2TAP(OPNAME, SIZE, MMX)\
+QPEL_2TAP_XY(OPNAME, SIZE, MMX, 20, _x2_ ## MMX)\
+QPEL_2TAP_XY(OPNAME, SIZE, MMX, 02, _y2_ ## MMX)\
+QPEL_2TAP_XY(OPNAME, SIZE, MMX, 22, _xy2_mmx)\
+static const qpel_mc_func OPNAME ## 2tap_qpel ## SIZE ## _mc00_ ## MMX =\
+                          OPNAME ## qpel ## SIZE ## _mc00_ ## MMX;\
+static const qpel_mc_func OPNAME ## 2tap_qpel ## SIZE ## _mc21_ ## MMX =\
+                          OPNAME ## 2tap_qpel ## SIZE ## _mc20_ ## MMX;\
+static const qpel_mc_func OPNAME ## 2tap_qpel ## SIZE ## _mc12_ ## MMX =\
+                          OPNAME ## 2tap_qpel ## SIZE ## _mc02_ ## MMX;\
+static void OPNAME ## 2tap_qpel ## SIZE ## _mc32_ ## MMX(uint8_t *dst, uint8_t *src, int stride){\
+    OPNAME ## pixels ## SIZE ## _y2_ ## MMX(dst, src+1, stride, SIZE);\
+}\
+static void OPNAME ## 2tap_qpel ## SIZE ## _mc23_ ## MMX(uint8_t *dst, uint8_t *src, int stride){\
+    OPNAME ## pixels ## SIZE ## _x2_ ## MMX(dst, src+stride, stride, SIZE);\
+}\
+QPEL_2TAP_L3(OPNAME, SIZE, MMX, 10, 0,         1,       0)\
+QPEL_2TAP_L3(OPNAME, SIZE, MMX, 30, 1,        -1,       0)\
+QPEL_2TAP_L3(OPNAME, SIZE, MMX, 01, 0,         stride,  0)\
+QPEL_2TAP_L3(OPNAME, SIZE, MMX, 03, stride,   -stride,  0)\
+QPEL_2TAP_L3(OPNAME, SIZE, MMX, 11, 0,         stride,  1)\
+QPEL_2TAP_L3(OPNAME, SIZE, MMX, 31, 1,         stride, -1)\
+QPEL_2TAP_L3(OPNAME, SIZE, MMX, 13, stride,   -stride,  1)\
+QPEL_2TAP_L3(OPNAME, SIZE, MMX, 33, stride+1, -stride, -1)\
+
+QPEL_2TAP(put_, 16, mmx2)
+QPEL_2TAP(avg_, 16, mmx2)
+QPEL_2TAP(put_,  8, mmx2)
+QPEL_2TAP(avg_,  8, mmx2)
+QPEL_2TAP(put_, 16, 3dnow)
+QPEL_2TAP(avg_, 16, 3dnow)
+QPEL_2TAP(put_,  8, 3dnow)
+QPEL_2TAP(avg_,  8, 3dnow)
+
+
 #if 0
 static void just_return() { return; }
 #endif
@@ -3276,6 +3323,11 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
             dspfunc(avg_h264_qpel, 0, 16);
             dspfunc(avg_h264_qpel, 1, 8);
             dspfunc(avg_h264_qpel, 2, 4);
+
+            dspfunc(put_2tap_qpel, 0, 16);
+            dspfunc(put_2tap_qpel, 1, 8);
+            dspfunc(avg_2tap_qpel, 0, 16);
+            dspfunc(avg_2tap_qpel, 1, 8);
 #undef dspfunc
 
             c->avg_h264_chroma_pixels_tab[0]= avg_h264_chroma_mc8_mmx2;
@@ -3399,6 +3451,11 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
             dspfunc(avg_h264_qpel, 1, 8);
             dspfunc(avg_h264_qpel, 2, 4);
 
+            dspfunc(put_2tap_qpel, 0, 16);
+            dspfunc(put_2tap_qpel, 1, 8);
+            dspfunc(avg_2tap_qpel, 0, 16);
+            dspfunc(avg_2tap_qpel, 1, 8);
+
             c->avg_h264_chroma_pixels_tab[0]= avg_h264_chroma_mc8_3dnow;
             c->avg_h264_chroma_pixels_tab[1]= avg_h264_chroma_mc4_3dnow;
         }