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arm: dcadsp: implement decode_hf as external NEON asm

This commit is contained in:
Janne Grunau 2014-02-22 18:27:10 +01:00
parent 4cb6964244
commit 6e4009d4cd
2 changed files with 36 additions and 0 deletions
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7
libavcodec/arm/dcadsp_init_arm.c
View File

@ -49,6 +49,12 @@ void ff_synth_filter_float_neon(FFTContext *imdct,
float out[32], const float in[32],
float scale);
void ff_decode_hf_neon(float dst[DCA_SUBBANDS][8],
const int32_t vq_num[DCA_SUBBANDS],
const int8_t hf_vq[1024][32], intptr_t vq_offset,
int32_t scale[DCA_SUBBANDS][2],
intptr_t start, intptr_t end);
av_cold void ff_dcadsp_init_arm(DCADSPContext *s)
{
int cpu_flags = av_get_cpu_flags();
@ -61,6 +67,7 @@ av_cold void ff_dcadsp_init_arm(DCADSPContext *s)
if (have_neon(cpu_flags)) {
s->lfe_fir[0] = ff_dca_lfe_fir0_neon;
s->lfe_fir[1] = ff_dca_lfe_fir1_neon;
s->decode_hf = ff_decode_hf_neon;
}
}

29
libavcodec/arm/dcadsp_neon.S
View File

@ -20,6 +20,35 @@
#include "libavutil/arm/asm.S"
function ff_decode_hf_neon, export=1
push {r4-r5,lr}
add r2, r2, r3
ldr r3, [sp, #12]
ldrd r4, r5, [sp, #16]
add r3, r3, r4, lsl #3
add r1, r1, r4, lsl #2
add r0, r0, r4, lsl #5
1: ldr_post lr, r1, #4
add r4, r4, #1
add lr, r2, lr, lsl #5
cmp r4, r5
vld1.32 {d7}, [r3]!
vld1.8 {d0}, [lr,:64]
vcvt.f32.s32 d7, d7, #4
vmovl.s8 q1, d0
vmovl.s16 q0, d2
vmovl.s16 q1, d3
vcvt.f32.s32 q0, q0
vcvt.f32.s32 q1, q1
vmul.f32 q0, q0, d7[0]
vmul.f32 q1, q1, d7[0]
vst1.32 {q0-q1}, [r0,:128]!
bne 1b
pop {r4-r5,pc}
endfunc
function ff_dca_lfe_fir0_neon, export=1
push {r4-r6,lr}
mov r3, #32 @ decifactor