Module: libav
Branch: master
Commit: 358adef0305618219522858e471edf7e0cb4043e
Author: Seppo Tomperi <seppo.tomp...@vtt.fi>
Committer: Martin Storsjö <mar...@martin.st>
Date: Tue Apr 25 19:41:29 2017 +0200
hevc: Add NEON IDCT DC functions for bitdepth 8
Signed-off-by: Alexandra Hájková <alexan...@khirnov.net>
Signed-off-by: Martin Storsjö <mar...@martin.st>
---
libavcodec/arm/hevc_idct.S | 78 +++++++++++++++++++++++++++++++++++++++
libavcodec/arm/hevcdsp_init_arm.c | 10 +++++
2 files changed, 88 insertions(+)
diff --git a/libavcodec/arm/hevc_idct.S b/libavcodec/arm/hevc_idct.S
index 156d476..ceded7a 100644
--- a/libavcodec/arm/hevc_idct.S
+++ b/libavcodec/arm/hevc_idct.S
@@ -1,5 +1,7 @@
/*
* ARM NEON optimised IDCT functions for HEVC decoding
+ *
+ * Copyright (c) 2014 Seppo Tomperi <seppo.tomp...@vtt.fi>
* Copyright (c) 2017 Alexandra Hájková
*
* This file is part of Libav.
@@ -28,6 +30,82 @@ const trans, align=4
.short 57, 43, 25, 9
endconst
+function ff_hevc_idct_4x4_dc_8_neon, export=1
+ ldrsh r1, [r0]
+ ldr r2, =0x20
+ add r1, #1
+ asr r1, #1
+ add r1, r2
+ asr r1, #6
+ vdup.16 q0, r1
+ vdup.16 q1, r1
+ vst1.16 {q0, q1}, [r0, :128]
+ bx lr
+endfunc
+
+function ff_hevc_idct_8x8_dc_8_neon, export=1
+ ldrsh r1, [r0]
+ ldr r2, =0x20
+ add r1, #1
+ asr r1, #1
+ add r1, r2
+ asr r1, #6
+ vdup.16 q8, r1
+ vdup.16 q9, r1
+ vmov.16 q10, q8
+ vmov.16 q11, q8
+ vmov.16 q12, q8
+ vmov.16 q13, q8
+ vmov.16 q14, q8
+ vmov.16 q15, q8
+ vstm r0, {q8-q15}
+ bx lr
+endfunc
+
+function ff_hevc_idct_16x16_dc_8_neon, export=1
+ ldrsh r1, [r0]
+ ldr r2, =0x20
+ add r1, #1
+ asr r1, #1
+ add r1, r2
+ asr r1, #6
+ vdup.16 q8, r1
+ vdup.16 q9, r1
+ vmov.16 q10, q8
+ vmov.16 q11, q8
+ vmov.16 q12, q8
+ vmov.16 q13, q8
+ vmov.16 q14, q8
+ vmov.16 q15, q8
+ vstm r0!, {q8-q15}
+ vstm r0!, {q8-q15}
+ vstm r0!, {q8-q15}
+ vstm r0, {q8-q15}
+ bx lr
+endfunc
+
+function ff_hevc_idct_32x32_dc_8_neon, export=1
+ ldrsh r1, [r0]
+ ldr r2, =0x20
+ add r1, #1
+ asr r1, #1
+ add r1, r2
+ asr r1, #6
+ mov r3, #16
+ vdup.16 q8, r1
+ vdup.16 q9, r1
+ vmov.16 q10, q8
+ vmov.16 q11, q8
+ vmov.16 q12, q8
+ vmov.16 q13, q8
+ vmov.16 q14, q8
+ vmov.16 q15, q8
+1: subs r3, #1
+ vstm r0!, {q8-q15}
+ bne 1b
+ bx lr
+endfunc
+
.macro sum_sub out, in, c, op
.ifc \op, +
vmlal.s16 \out, \in, \c
diff --git a/libavcodec/arm/hevcdsp_init_arm.c
b/libavcodec/arm/hevcdsp_init_arm.c
index e61587f..fa2e7ad 100644
--- a/libavcodec/arm/hevcdsp_init_arm.c
+++ b/libavcodec/arm/hevcdsp_init_arm.c
@@ -25,6 +25,11 @@
#include "libavcodec/hevcdsp.h"
+void ff_hevc_idct_4x4_dc_8_neon(int16_t *coeffs);
+void ff_hevc_idct_8x8_dc_8_neon(int16_t *coeffs);
+void ff_hevc_idct_16x16_dc_8_neon(int16_t *coeffs);
+void ff_hevc_idct_32x32_dc_8_neon(int16_t *coeffs);
+
void ff_hevc_idct_4x4_8_neon(int16_t *coeffs, int col_limit);
void ff_hevc_idct_8x8_8_neon(int16_t *coeffs, int col_limit);
void ff_hevc_idct_16x16_8_neon(int16_t *coeffs, int col_limit);
@@ -38,6 +43,11 @@ av_cold void ff_hevc_dsp_init_arm(HEVCDSPContext *c, int
bit_depth)
if (have_neon(cpu_flags)) {
if (bit_depth == 8) {
+ c->idct_dc[0] = ff_hevc_idct_4x4_dc_8_neon;
+ c->idct_dc[1] = ff_hevc_idct_8x8_dc_8_neon;
+ c->idct_dc[2] = ff_hevc_idct_16x16_dc_8_neon;
+ c->idct_dc[3] = ff_hevc_idct_32x32_dc_8_neon;
+
c->idct[0] = ff_hevc_idct_4x4_8_neon;
c->idct[1] = ff_hevc_idct_8x8_8_neon;
c->idct[2] = ff_hevc_idct_16x16_8_neon;
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