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VC1: merge idct8x8, coeff adjustments and put_pixels.

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Merging these functions allows merging some loops, which makes the
results (particularly after SIMD optimizations) much faster.
(cherry picked from commit f8bed30d8b)
This commit is contained in:
Ronald S. Bultje 2011-02-21 09:07:13 -05:00 • committed by Michael Niedermayer
parent 90ed2776ea
commit 6a786b15c3
5 changed files with 170 additions and 40 deletions
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64
libavcodec/ppc/vc1dsp_altivec.c
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@ -130,7 +130,8 @@ do { \
/** Do inverse transform on 8x8 block
*/
static void vc1_inv_trans_8x8_altivec(DCTELEM block[64])
static void vc1_inv_trans_8x8_altivec(DCTELEM block[64],
int sign, int rangered)
{
vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
@ -144,7 +145,9 @@ static void vc1_inv_trans_8x8_altivec(DCTELEM block[64])
const vector unsigned int vec_2 = vec_splat_u32(2);
const vector signed int vec_1s = vec_splat_s32(1);
const vector unsigned int vec_1 = vec_splat_u32(1);
const vector unsigned short rangered_shift = vec_splat_u16(1);
const vector signed short signed_bias = vec_sl(vec_splat_u16(4),
vec_splat_u16(4));
src0 = vec_ld( 0, block);
src1 = vec_ld( 16, block);
@ -214,6 +217,27 @@ static void vc1_inv_trans_8x8_altivec(DCTELEM block[64])
src6 = vec_pack(sE, s6);
src7 = vec_pack(sF, s7);
if (rangered) {
if (!sign) {
vec_sub(src0, signed_bias);
vec_sub(src1, signed_bias);
vec_sub(src2, signed_bias);
vec_sub(src3, signed_bias);
vec_sub(src4, signed_bias);
vec_sub(src5, signed_bias);
vec_sub(src6, signed_bias);
vec_sub(src7, signed_bias);
}
vec_sl(src0, rangered_shift);
vec_sl(src1, rangered_shift);
vec_sl(src2, rangered_shift);
vec_sl(src3, rangered_shift);
vec_sl(src4, rangered_shift);
vec_sl(src5, rangered_shift);
vec_sl(src6, rangered_shift);
vec_sl(src7, rangered_shift);
}
vec_st(src0, 0, block);
vec_st(src1, 16, block);
vec_st(src2, 32, block);
@ -224,6 +248,36 @@ static void vc1_inv_trans_8x8_altivec(DCTELEM block[64])
vec_st(src7,112, block);
}
static void vc1_inv_trans_8x8_add_altivec(uint8_t *dest, int stride, DCTELEM *b)
{
vc1_inv_trans_8x8_altivec(b, 0, 0);
ff_add_pixels_clamped_c(b, dest, stride);
}
static void vc1_inv_trans_8x8_put_signed_altivec(uint8_t *dest, int stride, DCTELEM *b)
{
vc1_inv_trans_8x8_altivec(b, 1, 0);
ff_put_signed_pixels_clamped_c(b, dest, stride);
}
static void vc1_inv_trans_8x8_put_signed_rangered_altivec(uint8_t *dest, int stride, DCTELEM *b)
{
vc1_inv_trans_8x8_altivec(b, 1, 1);
ff_put_signed_pixels_clamped_c(b, dest, stride);
}
static void vc1_inv_trans_8x8_put_altivec(uint8_t *dest, int stride, DCTELEM *b)
{
vc1_inv_trans_8x8_altivec(b, 0, 0);
ff_put_pixels_clamped_c(b, dest, stride);
}
static void vc1_inv_trans_8x8_put_rangered_altivec(uint8_t *dest, int stride, DCTELEM *b)
{
vc1_inv_trans_8x8_altivec(b, 0, 1);
ff_put_pixels_clamped_c(b, dest, stride);
}
/** Do inverse transform on 8x4 part of block
*/
static void vc1_inv_trans_8x4_altivec(uint8_t *dest, int stride, DCTELEM *block)
@ -342,7 +396,11 @@ void ff_vc1dsp_init_altivec(VC1DSPContext* dsp)
if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
return;
dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;
dsp->vc1_inv_trans_8x8_add = vc1_inv_trans_8x8_add_altivec;
dsp->vc1_inv_trans_8x8_put_signed[0] = vc1_inv_trans_8x8_put_signed_altivec;
dsp->vc1_inv_trans_8x8_put_signed[1] = vc1_inv_trans_8x8_put_signed_rangered_altivec;
dsp->vc1_inv_trans_8x8_put[0] = vc1_inv_trans_8x8_put_altivec;
dsp->vc1_inv_trans_8x8_put[1] = vc1_inv_trans_8x8_put_rangered_altivec;
dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
dsp->put_no_rnd_vc1_chroma_pixels_tab[0] = put_no_rnd_vc1_chroma_mc8_altivec;
dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = avg_no_rnd_vc1_chroma_mc8_altivec;