From 1bf98d19d57b082387a4e939f90c385e28511fc6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Mon, 15 Dec 2008 22:12:54 +0000
Subject: [PATCH] ARM: NEON optimised h264_idct_dc_add
Originally committed as revision 16151 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/armv4l/dsputil_neon.c | 2 ++
libavcodec/armv4l/h264idct_neon.S | 19 +++++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/libavcodec/armv4l/dsputil_neon.c b/libavcodec/armv4l/dsputil_neon.c
index 4fe5d0f4d3b..5204c50e377 100644
--- a/libavcodec/armv4l/dsputil_neon.c
+++ b/libavcodec/armv4l/dsputil_neon.c
@@ -93,6 +93,7 @@ void ff_h264_h_loop_filter_chroma_neon(uint8_t *pix, int stride, int alpha,
int beta, int8_t *tc0);
void ff_h264_idct_add_neon(uint8_t *dst, DCTELEM *block, int stride);
+void ff_h264_idct_dc_add_neon(uint8_t *dst, DCTELEM *block, int stride);
void ff_dsputil_init_neon(DSPContext *c, AVCodecContext *avctx)
{
@@ -164,4 +165,5 @@ void ff_dsputil_init_neon(DSPContext *c, AVCodecContext *avctx)
c->h264_h_loop_filter_chroma = ff_h264_h_loop_filter_chroma_neon;
c->h264_idct_add = ff_h264_idct_add_neon;
+ c->h264_idct_dc_add = ff_h264_idct_dc_add_neon;
}
diff --git a/libavcodec/armv4l/h264idct_neon.S b/libavcodec/armv4l/h264idct_neon.S
index 3484ca96108..b7ef2f45199 100644
--- a/libavcodec/armv4l/h264idct_neon.S
+++ b/libavcodec/armv4l/h264idct_neon.S
@@ -75,3 +75,22 @@ function ff_h264_idct_add_neon, export=1
bx lr
.endfunc
+
+function ff_h264_idct_dc_add_neon, export=1
+ vld1.16 {d2[],d3[]}, [r1,:16]
+ vrshr.s16 q1, q1, #6
+ vld1.32 {d0[0]}, [r0,:32], r2
+ vld1.32 {d0[1]}, [r0,:32], r2
+ vaddw.u8 q2, q1, d0
+ vld1.32 {d1[0]}, [r0,:32], r2
+ vld1.32 {d1[1]}, [r0,:32], r2
+ vaddw.u8 q1, q1, d1
+ vqmovun.s16 d0, q2
+ vqmovun.s16 d1, q1
+ sub r0, r0, r2, lsl #2
+ vst1.32 {d0[0]}, [r0,:32], r2
+ vst1.32 {d0[1]}, [r0,:32], r2
+ vst1.32 {d1[0]}, [r0,:32], r2
+ vst1.32 {d1[1]}, [r0,:32], r2
+ bx lr
+ .endfunc
--
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