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videomixer: Add MMX implementations of the AYUV blending and color filling functions
This provides a 20% speedup for blending and 100% for color filling. The blending can probably be optimized even more.
This commit is contained in:
Sebastian Dröge
parent
d3a9f07669
commit
061ededa36
3 changed files with 172 additions and 3 deletions
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@ -1,8 +1,8 @@
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plugin_LTLIBRARIES = libgstvideomixer.la
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libgstvideomixer_la_SOURCES = videomixer.c blend_ayuv.c blend_bgra.c blend_i420.c blend_rgb.c
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libgstvideomixer_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS)
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libgstvideomixer_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS) $(GST_CONTROLLER_LIBS) $(GST_PLUGINS_BASE_LIBS) -lgstvideo-@GST_MAJORMINOR@
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libgstvideomixer_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(LIBOIL_CFLAGS)
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libgstvideomixer_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS) $(GST_CONTROLLER_LIBS) $(GST_PLUGINS_BASE_LIBS) -lgstvideo-@GST_MAJORMINOR@ $(LIBOIL_LIBS)
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libgstvideomixer_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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libgstvideomixer_la_LIBTOOLFLAGS = --tag=disable-static
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@ -1,5 +1,6 @@
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/*
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* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
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* Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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@ -17,9 +18,18 @@
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#ifdef HAVE_GCC_ASM
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#if defined(HAVE_CPU_I386) || defined(HAVE_CPU_X86_64)
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#define BUILD_X86_ASM
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#endif
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#endif
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#define BLEND_NORMAL(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
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Y = ((Y1*(255-alpha))+(Y2*alpha))>>8; \
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U = ((U1*(255-alpha))+(U2*alpha))>>8; \
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@ -230,6 +240,93 @@ gst_videomixer_blend_ayuv_ayuv (guint8 * src, gint xpos, gint ypos,
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#undef BLEND_MODE
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#ifdef BUILD_X86_ASM
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void
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gst_videomixer_blend_ayuv_ayuv_mmx (guint8 * src, gint xpos, gint ypos,
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gint src_width, gint src_height, gdouble src_alpha,
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guint8 * dest, gint dest_width, gint dest_height)
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{
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gint b_alpha;
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gint i;
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gint src_stride, dest_stride;
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gint src_add, dest_add;
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src_stride = src_width * 4;
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dest_stride = dest_width * 4;
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b_alpha = (gint) (src_alpha * 255);
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/* adjust src pointers for negative sizes */
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if (xpos < 0) {
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src += -xpos * 4;
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src_width -= -xpos;
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xpos = 0;
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}
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if (ypos < 0) {
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src += -ypos * src_stride;
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src_height -= -ypos;
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ypos = 0;
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}
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/* adjust width/height if the src is bigger than dest */
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if (xpos + src_width > dest_width) {
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src_width = dest_width - xpos;
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}
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if (ypos + src_height > dest_height) {
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src_height = dest_height - ypos;
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}
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src_add = src_stride - (4 * src_width);
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dest_add = dest_stride - (4 * src_width);
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dest = dest + 4 * xpos + (ypos * dest_stride);
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for (i = 0; i < src_height; i++) {
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/* *INDENT-OFF* */
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__asm__ __volatile__ (
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"pxor %%mm7 , %%mm7 \n\t" /* mm7 = 0 */
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"pcmpeqd %%mm6 , %%mm6 \n\t" /* mm6 = 0xffff... */
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"punpcklbw %%mm7 , %%mm6 \n\t" /* mm6 = 0x00ff00ff00ff... */
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"pcmpeqd %%mm5 , %%mm5 \n\t" /* mm5 = 0xffff... */
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"psrlq $56 , %%mm5 \n\t" /* mm5 = 0x0...0ff */
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"xor %%ecx , %%ecx \n\t" /* ecx = 0 */
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"1: \n\t"
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"movzxb (%0) , %%eax \n\t" /* eax == source alpha */
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"imul %2 , %%eax \n\t" /* eax = source alpha * alpha */
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"sar $8 , %%eax \n\t" /* eax = (source alpha * alpha) / 256 */
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"movd %%eax , %%mm0 \n\t" /* mm0 = apply alpha */
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"movd (%0) , %%mm2 \n\t" /* mm2 = src */
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"movd (%1) , %%mm1 \n\t" /* mm1 = dest */
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"punpcklwd %%mm0 , %%mm0 \n\t"
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"punpckldq %%mm0 , %%mm0 \n\t" /* mm0 == 0a 0a 0a 0a */
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"punpcklbw %%mm7 , %%mm1 \n\t" /* mm1 == dv du dy da */
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"punpcklbw %%mm7 , %%mm2 \n\t" /* mm2 == sv su sy sa */
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"pmullw %%mm0 , %%mm2 \n\t" /* mm2 == a * s */
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"pandn %%mm6 , %%mm0 \n\t" /* mm0 == 255 - a */
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"pmullw %%mm0 , %%mm1 \n\t" /* mm1 == (255 - a) * d */
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"paddusw %%mm2 , %%mm1 \n\t" /* mm1 == s + d */
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"psrlw $8 , %%mm1 \n\t"
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"packuswb %%mm7 , %%mm1 \n\t"
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"por %%mm5 , %%mm1 \n\t" /* mm1 = 0x.....ff */
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"movd %%mm1 , (%1) \n\t" /* dest = mm1 */
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"add $4 , %1 \n\t"
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"add $4 , %0 \n\t"
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"add $1 , %%ecx \n\t"
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"cmp %%ecx , %3 \n\t"
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"jne 1b"
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: /* no output */
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:"r" (src), "r" (dest), "r" (b_alpha), "r" (src_width)
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:"%eax", "%ecx", "memory"
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#ifdef __MMX__
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, "mm0", "mm1", "mm2", "mm5", "mm6", "mm7"
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#endif
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);
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/* *INDENT-ON* */
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src += src_add;
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dest += dest_add;
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}
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__asm__ __volatile__ ("emms");
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}
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#endif
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/* fill a buffer with a checkerboard pattern */
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void
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@ -263,3 +360,42 @@ gst_videomixer_fill_ayuv_color (guint8 * dest, gint width, gint height,
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}
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}
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}
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#ifdef BUILD_X86_ASM
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void
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gst_videomixer_fill_ayuv_color_mmx (guint8 * dest, gint width, gint height,
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gint colY, gint colU, gint colV)
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{
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guint64 val;
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guint nvals = width * height;
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val = (((guint64) 0xff)) | (((guint64) colY) << 8) |
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(((guint64) colU) << 16) | (((guint64) colV) << 24);
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val = (val << 32) | val;
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/* *INDENT-OFF* */
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__asm__ __volatile__ (
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"cmp $2 , %2 \n\t"
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"jb 2f \n\t"
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"movq %4 , %%mm0 \n\t"
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"1: \n\t"
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"movq %%mm0 , (%1) \n\t"
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"sub $2 , %0 \n\t"
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"add $8 , %1 \n\t"
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"cmp $2 , %2 \n\t"
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"jae 1b \n\t"
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"emms \n\t"
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"2: \n\t"
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: "=r" (nvals), "=r" (dest)
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: "0" (nvals), "1" (dest), "r" (val)
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: "memory"
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#ifdef __MMX__
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, "mm0"
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#endif
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);
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/* *INDENT-ON* */
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if (nvals)
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GST_WRITE_UINT32_LE (&dest[-4], (guint32) (val & 0xffffffff));
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}
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#endif
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@ -57,11 +57,21 @@
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#include "config.h"
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#endif
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#ifdef HAVE_GCC_ASM
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#if defined(HAVE_CPU_I386) || defined(HAVE_CPU_X86_64)
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#define BUILD_X86_ASM
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#endif
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#endif
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#include <gst/gst.h>
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#include <gst/base/gstcollectpads.h>
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#include <gst/controller/gstcontroller.h>
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#include <gst/video/video.h>
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#include <liboil/liboil.h>
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#include <liboil/liboilcpu.h>
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#include <liboil/liboilfunction.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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@ -160,6 +170,14 @@ void gst_videomixer_fill_i420_checker (guint8 * dest, gint width, gint height);
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void gst_videomixer_fill_i420_color (guint8 * dest, gint width, gint height,
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gint colY, gint colU, gint colV);
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#ifdef BUILD_X86_ASM
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void gst_videomixer_blend_ayuv_ayuv_mmx (guint8 * src, gint xpos, gint ypos,
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gint src_width, gint src_height, gdouble src_alpha,
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guint8 * dest, gint dest_width, gint dest_height);
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void gst_videomixer_fill_ayuv_color_mmx (guint8 * dest, gint width, gint height,
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gint colY, gint colU, gint colV);
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#endif
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#define DEFAULT_PAD_ZORDER 0
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#define DEFAULT_PAD_XPOS 0
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#define DEFAULT_PAD_YPOS 0
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@ -920,12 +938,25 @@ gst_videomixer_setcaps (GstPad * pad, GstCaps * caps)
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goto done;
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switch (mixer->fmt) {
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case GST_VIDEO_FORMAT_AYUV:
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case GST_VIDEO_FORMAT_AYUV:{
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#ifdef BUILD_X86_ASM
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guint cpu_flags = oil_cpu_get_flags ();
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mixer->blend =
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(cpu_flags & OIL_IMPL_FLAG_MMX) ? gst_videomixer_blend_ayuv_ayuv_mmx :
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gst_videomixer_blend_ayuv_ayuv;
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mixer->fill_checker = gst_videomixer_fill_ayuv_checker;
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mixer->fill_color =
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(cpu_flags & OIL_IMPL_FLAG_MMX) ? gst_videomixer_fill_ayuv_color_mmx :
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gst_videomixer_fill_ayuv_color;
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#else
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mixer->blend = gst_videomixer_blend_ayuv_ayuv;
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mixer->fill_checker = gst_videomixer_fill_ayuv_checker;
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mixer->fill_color = gst_videomixer_fill_ayuv_color;
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#endif
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ret = TRUE;
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break;
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}
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case GST_VIDEO_FORMAT_I420:
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mixer->blend = gst_videomixer_blend_i420_i420;
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mixer->fill_checker = gst_videomixer_fill_i420_checker;
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@ -1623,6 +1654,8 @@ plugin_init (GstPlugin * plugin)
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GST_DEBUG_CATEGORY_INIT (gst_videomixer_debug, "videomixer", 0,
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"video mixer");
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oil_init ();
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return gst_element_register (plugin, "videomixer", GST_RANK_PRIMARY,
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GST_TYPE_VIDEO_MIXER);
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}
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