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Code Issues Releases Activity

ARM: NEON optimised h264_idct_dc_add

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Originally committed as revision 16151 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2008-12-15 22:12:54 +00:00
parent c598cf25f4
commit 1bf98d19d5
2 changed files with 21 additions and 0 deletions
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2
libavcodec/armv4l/dsputil_neon.c
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@ -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;
}

19
libavcodec/armv4l/h264idct_neon.S
View File

@ -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