Port pred8x8l_down_left_sse2/ssse3 (H.264 intra prediction) from x264 (authors:

Jason, Loren, Holger) to FFmpeg. Patch by Daniel Kang <daniel dot d dot kang at
gmail com>, as part of Google's GCI 2010.

Originally committed as revision 26142 to svn://svn.ffmpeg.org/ffmpeg/trunk

2 files changed, 101 insertions, 0 deletions

diff --git a/libavcodec/x86/h264_intrapred.asm b/libavcodec/x86/h264_intrapred.asm
index a151205555..28b6bfd132 100644
--- a/libavcodec/x86/h264_intrapred.asm
+++ b/libavcodec/x86/h264_intrapred.asm
@@ -1375,6 +1375,101 @@ PRED8x8L_VERTICAL ssse3
 %endif
 
 ;-----------------------------------------------------------------------------
+;void pred8x8l_down_left(uint8_t *src, int has_topleft, int has_topright, int stride)
+;-----------------------------------------------------------------------------
+%ifdef CONFIG_GPL
+%macro PRED8x8L_DOWN_LEFT 1
+cglobal pred8x8l_down_left_%1, 4,4
+    sub          r0, r3
+    movq        mm0, [r0-8]
+    movq        mm3, [r0]
+    movq        mm1, [r0+8]
+    movq        mm2, mm3
+    movq        mm4, mm3
+    PALIGNR     mm2, mm0, 7, mm0
+    PALIGNR     mm1, mm4, 1, mm4
+    test         r1, r1 ; top_left
+    jz .fix_lt_2
+    test         r2, r2 ; top_right
+    jz .fix_tr_1
+    jmp .do_top
+.fix_lt_2:
+    movq        mm5, mm3
+    pxor        mm5, mm2
+    psllq       mm5, 56
+    psrlq       mm5, 56
+    pxor        mm2, mm5
+    test         r2, r2 ; top_right
+    jnz .do_top
+.fix_tr_1:
+    movq        mm5, mm3
+    pxor        mm5, mm1
+    psrlq       mm5, 56
+    psllq       mm5, 56
+    pxor        mm1, mm5
+    jmp .do_top
+.fix_tr_2:
+    punpckhbw   mm3, mm3
+    pshufw      mm1, mm3, 0xFF
+    jmp .do_topright
+.do_top:
+    PRED4x4_LOWPASS mm4, mm2, mm1, mm3, mm5
+    movq2dq    xmm3, mm4
+    test         r2, r2 ; top_right
+    jz .fix_tr_2
+    movq        mm0, [r0+8]
+    movq        mm5, mm0
+    movq        mm2, mm0
+    movq        mm4, mm0
+    psrlq       mm5, 56
+    PALIGNR     mm2, mm3, 7, mm3
+    PALIGNR     mm5, mm4, 1, mm4
+    PRED4x4_LOWPASS mm1, mm2, mm5, mm0, mm4
+.do_topright:
+    movq2dq    xmm4, mm1
+    psrlq       mm1, 56
+    movq2dq    xmm5, mm1
+    lea         r1, [r0+r3*2]
+    pslldq    xmm4, 8
+    por       xmm3, xmm4
+    movdqa    xmm2, xmm3
+    psrldq    xmm2, 1
+    pslldq    xmm5, 15
+    por       xmm2, xmm5
+    lea         r2, [r1+r3*2]
+    movdqa    xmm1, xmm3
+    pslldq    xmm1, 1
+INIT_XMM
+    PRED4x4_LOWPASS xmm0, xmm1, xmm2, xmm3, xmm4
+    psrldq    xmm0, 1
+    movq [r0+r3*1], xmm0
+    psrldq    xmm0, 1
+    movq [r0+r3*2], xmm0
+    psrldq    xmm0, 1
+    lea         r0, [r2+r3*2]
+    movq [r1+r3*1], xmm0
+    psrldq    xmm0, 1
+    movq [r1+r3*2], xmm0
+    psrldq    xmm0, 1
+    movq [r2+r3*1], xmm0
+    psrldq    xmm0, 1
+    movq [r2+r3*2], xmm0
+    psrldq    xmm0, 1
+    movq [r0+r3*1], xmm0
+    psrldq    xmm0, 1
+    movq [r0+r3*2], xmm0
+    RET
+%endmacro
+
+INIT_MMX
+%define PALIGNR PALIGNR_MMX
+PRED8x8L_DOWN_LEFT sse2
+INIT_MMX
+%define PALIGNR PALIGNR_SSSE3
+PRED8x8L_DOWN_LEFT ssse3
+%endif
+
+;-----------------------------------------------------------------------------
 ; void pred4x4_dc_mmxext(uint8_t *src, const uint8_t *topright, int stride)
 ;-----------------------------------------------------------------------------
 
diff --git a/libavcodec/x86/h264_intrapred_init.c b/libavcodec/x86/h264_intrapred_init.c
index bda7db3363..19de71f5cf 100644
--- a/libavcodec/x86/h264_intrapred_init.c
+++ b/libavcodec/x86/h264_intrapred_init.c
@@ -67,6 +67,8 @@ void ff_pred8x8l_horizontal_mmxext (uint8_t *src, int has_topleft, int has_topri
 void ff_pred8x8l_horizontal_ssse3  (uint8_t *src, int has_topleft, int has_topright, int stride);
 void ff_pred8x8l_vertical_mmxext   (uint8_t *src, int has_topleft, int has_topright, int stride);
 void ff_pred8x8l_vertical_ssse3    (uint8_t *src, int has_topleft, int has_topright, int stride);
+void ff_pred8x8l_down_left_sse2    (uint8_t *src, int has_topleft, int has_topright, int stride);
+void ff_pred8x8l_down_left_ssse3   (uint8_t *src, int has_topleft, int has_topright, int stride);
 void ff_pred4x4_dc_mmxext          (uint8_t *src, const uint8_t *topright, int stride);
 void ff_pred4x4_down_left_mmxext   (uint8_t *src, const uint8_t *topright, int stride);
 void ff_pred4x4_tm_vp8_mmx         (uint8_t *src, const uint8_t *topright, int stride);
@@ -143,6 +145,9 @@ void ff_h264_pred_init_x86(H264PredContext *h, int codec_id)
 
     if (mm_flags & AV_CPU_FLAG_SSE2) {
         h->pred16x16[DC_PRED8x8  ] = ff_pred16x16_dc_sse2;
+#if CONFIG_GPL
+        h->pred8x8l [DIAG_DOWN_LEFT_PRED] = ff_pred8x8l_down_left_sse2;
+#endif
         if (codec_id == CODEC_ID_VP8) {
             h->pred16x16[PLANE_PRED8x8] = ff_pred16x16_tm_vp8_sse2;
             h->pred8x8  [PLANE_PRED8x8] = ff_pred8x8_tm_vp8_sse2;
@@ -167,6 +172,7 @@ void ff_h264_pred_init_x86(H264PredContext *h, int codec_id)
         h->pred8x8l [DC_PRED     ] = ff_pred8x8l_dc_ssse3;
         h->pred8x8l [HOR_PRED    ] = ff_pred8x8l_horizontal_ssse3;
         h->pred8x8l [VERT_PRED   ] = ff_pred8x8l_vertical_ssse3;
+        h->pred8x8l [DIAG_DOWN_LEFT_PRED] = ff_pred8x8l_down_left_ssse3;
 #endif
         if (codec_id == CODEC_ID_VP8) {
             h->pred8x8  [PLANE_PRED8x8] = ff_pred8x8_tm_vp8_ssse3;