NEON accelerated I420/YV12 -> YUYV/UYVY chroma conversion

modules/video_chroma/Modules.am

@@ -83,3 +83,13 @@ libvlc_LTLIBRARIES += \
 	libi420_rgb_plugin.la \
 	libgrey_yuv_plugin.la \
 	$(NULL)
+
+libchroma_neon_plugin_la_SOURCES = \
+	i420_yuyv_neon.S \
+	neon.c
+libchroma_neon_plugin_la_CFLAGS = $(AM_CFLAGS)
+libchroma_neon_plugin_la_LIBADD = $(AM_LIBADD)
+libchroma_neon_plugin_la_DEPENDENCIES =
+if HAVE_NEON
+libvlc_LTLIBRARIES += libchroma_neon_plugin.la
+endif

modules/video_chroma/i420_yuyv_neon.S

+ @****************************************************************************
+ @ i420_yuyv_neon.S : ARM NEONv1 I420 to YUYV chroma conversion
+ @*****************************************************************************
+ @ Copyright (C) 2009 Rémi Denis-Courmont
+ @
+ @ This program is free software; you can redistribute it and/or modify
+ @ it under the terms of the GNU General Public License as published by
+ @ the Free Software Foundation; either version 2 of the License, or
+ @ (at your option) any later version.
+ @
+ @ This program is distributed in the hope that it will be useful,
+ @ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ @ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ @ GNU General Public License for more details.
+ @
+ @ You should have received a copy of the GNU General Public License
+ @ along with this program; if not, write to the Free Software
+ @ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ @****************************************************************************/
+
+	.fpu neon
+	.text
+
+#define O1	r0
+#define	O2	r1
+#define	PITCH	r2
+#define	HEIGHT	r3
+#define	Y1	r4
+#define	Y2	r5
+#define	U	r6
+#define	V	r7
+#define	END_O1	r8
+
+	.align
+	.global i420_uyvy_neon
+	.type	i420_uyvy_neon, %function
+i420_uyvy_neon:
+	push		{r4-r8}
+	add		r8,	pc,	#(indexes+64-.-8)
+	b		i420_pack_neon
+
+	.global i420_yuyv_neon
+	.type	i420_yuyv_neon, %function
+i420_yuyv_neon:
+	push		{r4-r8}
+	add		r8,	pc,	#(indexes-.-8)
+	.hidden	i420_pack_neon
+i420_pack_neon:
+	vld1.u8		{d24-d27},	[r8]!
+	ldmia		r1,	{r4, r6, r7}
+	vld1.u8		{d28-d31},	[r8]
+	add		O2,	O1,	PITCH, lsl #1
+	add		Y2,	Y1,	PITCH
+1:
+	mov		END_O1,	O2
+2:
+	vld1.u8		{d0-d1},	[Y1,:128]!
+	vld1.u8		{d2},		[U,:64]!
+	vld1.u8		{d3},		[V,:64]!
+	vld1.u8		{d4-d5},	[Y2,:128]!
+	vtbl.u8		d16,	{d0-d3},	d24
+	vtbl.u8		d17,	{d0-d3},	d25
+	vtbl.u8		d18,	{d0-d3},	d26
+	vtbl.u8		d19,	{d0-d3},	d27
+	vtbl.u8		d20,	{d2-d5},	d28
+	vtbl.u8		d21,	{d2-d5},	d29
+	vtbl.u8		d22,	{d2-d5},	d30
+	vtbl.u8		d23,	{d2-d5},	d31
+	vst1.u8		{d16-d19},	[O1,:128]!
+	vst1.u8		{d20-d23},	[O2,:128]!
+
+	cmp		O1,	END_O1
+	bne		2b
+
+	sub		HEIGHT,	#2
+	mov		O1,	O2
+	add		O2,	PITCH,	lsl #1
+	mov		Y1,	Y2
+	add		Y2,	PITCH
+
+	cmp		HEIGHT,	#0
+	bne		1b
+
+	pop		{r4-r8}
+	bx		lr
+
+	.hidden indexes
+indexes:
+	@ YUYV1
+	.byte	0x00, 0x10, 0x01, 0x18, 0x02, 0x11, 0x03, 0x19
+	.byte	0x04, 0x12, 0x05, 0x1A, 0x06, 0x13, 0x07, 0x1B
+	.byte	0x08, 0x14, 0x09, 0x1C, 0x0A, 0x15, 0x0B, 0x1D
+	.byte	0x0C, 0x16, 0x0D, 0x1E, 0x0E, 0x17, 0x0F, 0x1F
+	@ YUYV2
+	.byte	0x10, 0x00, 0x11, 0x08, 0x12, 0x01, 0x13, 0x09
+	.byte	0x14, 0x02, 0x15, 0x0A, 0x16, 0x03, 0x17, 0x0B
+	.byte	0x18, 0x04, 0x19, 0x0C, 0x1A, 0x05, 0x1B, 0x0D
+	.byte	0x1C, 0x06, 0x1D, 0x0E, 0x1E, 0x07, 0x1F, 0x0F
+	@ UYVY1
+	.byte	0x10, 0x00, 0x18, 0x01, 0x11, 0x02, 0x19, 0x03
+	.byte	0x12, 0x04, 0x1A, 0x05, 0x13, 0x06, 0x1B, 0x07
+	.byte	0x14, 0x08, 0x1C, 0x09, 0x15, 0x0A, 0x1D, 0x0B
+	.byte	0x16, 0x0C, 0x1E, 0x0D, 0x17, 0x0E, 0x1F, 0x0F
+	@ UYVY2
+	.byte	0x00, 0x10, 0x08, 0x11, 0x01, 0x12, 0x09, 0x13
+	.byte	0x02, 0x14, 0x0A, 0x15, 0x03, 0x16, 0x0B, 0x17
+	.byte	0x04, 0x18, 0x0C, 0x19, 0x05, 0x1A, 0x0D, 0x1B
+	.byte	0x06, 0x1C, 0x0E, 0x1D, 0x07, 0x1E, 0x0F, 0x1F

modules/video_chroma/neon.c

+/*****************************************************************************
+ * neon.c : ARM NEONv1 chroma conversion module for VLC
+ *****************************************************************************
+ * Copyright (C) 2009 Rémi Denis-Courmont
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_filter.h>
+
+static int Open (vlc_object_t *);
+
+vlc_module_begin ()
+    set_description (N_("ARM NEON video chroma conversions"))
+    set_capability ("video filter2", 250)
+    set_callbacks (Open, NULL)
+    add_requirement (NEON)
+vlc_module_end ()
+
+void i420_yuyv_neon (uint8_t *out, const uint8_t **in,
+                     uintptr_t pitch, uintptr_t height);
+
+static void I420_YUYV (filter_t *filter, picture_t *src, picture_t *dst)
+{
+    uint8_t *out = dst->p->p_pixels;
+    const uint8_t *yuv[3] = { src->Y_PIXELS, src->U_PIXELS, src->V_PIXELS, };
+    size_t pitch = (filter->fmt_in.video.i_width + 15) & ~15;
+    size_t height = filter->fmt_in.video.i_height;
+
+    i420_yuyv_neon (out, yuv, pitch, height);
+}
+
+void i420_uyvy_neon (uint8_t *out, const uint8_t **in,
+                     uintptr_t pitch, uintptr_t height);
+
+static void I420_UYVY (filter_t *filter, picture_t *src, picture_t *dst)
+{
+    uint8_t *out = dst->p->p_pixels;
+    const uint8_t *yuv[3] = { src->Y_PIXELS, src->U_PIXELS, src->V_PIXELS, };
+    size_t pitch = (filter->fmt_in.video.i_width + 15) & ~15;
+    size_t height = filter->fmt_in.video.i_height;
+
+    i420_yuyv_neon (out, yuv, pitch, height);
+}
+
+VIDEO_FILTER_WRAPPER (I420_YUYV)
+VIDEO_FILTER_WRAPPER (I420_UYVY)
+
+static int Open (vlc_object_t *obj)
+{
+    filter_t *filter = (filter_t *)obj;
+
+    if (((filter->fmt_in.video.i_width | filter->fmt_in.video.i_height) & 1)
+     || (filter->fmt_in.video.i_width != filter->fmt_out.video.i_width)
+     || (filter->fmt_in.video.i_height != filter->fmt_out.video.i_height))
+        return VLC_EGENERIC;
+
+    switch (filter->fmt_in.video.i_chroma)
+    {
+        case VLC_CODEC_YV12:
+        case VLC_CODEC_I420:
+            switch (filter->fmt_out.video.i_chroma)
+            {
+                case VLC_CODEC_YUYV:
+                    filter->pf_video_filter = I420_YUYV_Filter;
+                    break;
+                case VLC_CODEC_UYVY:
+                    filter->pf_video_filter = I420_UYVY_Filter;
+                    break;
+                default:
+                    return VLC_EGENERIC;
+            }
+            break;
+
+        default:
+            return VLC_EGENERIC;
+    }
+    return VLC_SUCCESS;
+}