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audio-resample: fix taps conversion

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We do taps conversion in place so make sure we don't overwrite the
input with temporary data.
Optimize some more gint16 functions.
This commit is contained in:
Wim Taymans 2016-02-11 13:23:07 +01:00
parent f6e0481ab5
commit bdf194a09a
2 changed files with 18 additions and 23 deletions
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37
gst-libs/gst/audio/audio-resampler-x86.h
View file

@ -152,7 +152,7 @@ inner_product_gint16_linear_1_sse2 (gint16 * o, const gint16 * a,
const gint16 * b, gint len, const gint16 * icoeff, gint oversample)
{
gint i = 0;
__m128i sum, t, ta, tb, m1, m2;
__m128i sum, t, ta, tb;
__m128i f = _mm_cvtsi64_si128 (*((long long*)icoeff));
sum = _mm_setzero_si128 ();
@ -161,23 +161,19 @@ inner_product_gint16_linear_1_sse2 (gint16 * o, const gint16 * a,
for (; i < len; i += 8) {
t = _mm_loadu_si128 ((__m128i *) (a + i));
ta = _mm_unpacklo_epi16 (t, t);
ta = _mm_unpacklo_epi32 (t, t);
tb = _mm_load_si128 ((__m128i *) (b + 2 * i + 0));
tb = _mm_shufflelo_epi16 (tb, _MM_SHUFFLE (3,1,2,0));
tb = _mm_shufflehi_epi16 (tb, _MM_SHUFFLE (3,1,2,0));
m1 = _mm_mulhi_epi16 (ta, tb);
m2 = _mm_mullo_epi16 (ta, tb);
sum = _mm_add_epi32 (sum, _mm_madd_epi16 (ta, tb));
sum = _mm_add_epi32 (sum, _mm_unpacklo_epi16 (m2, m1));
sum = _mm_add_epi32 (sum, _mm_unpackhi_epi16 (m2, m1));
ta = _mm_unpackhi_epi16 (t, t);
ta = _mm_unpackhi_epi32 (t, t);
tb = _mm_load_si128 ((__m128i *) (b + 2 * i + 8));
tb = _mm_shufflelo_epi16 (tb, _MM_SHUFFLE (3,1,2,0));
tb = _mm_shufflehi_epi16 (tb, _MM_SHUFFLE (3,1,2,0));
m1 = _mm_mulhi_epi16 (ta, tb);
m2 = _mm_mullo_epi16 (ta, tb);
sum = _mm_add_epi32 (sum, _mm_unpacklo_epi16 (m2, m1));
sum = _mm_add_epi32 (sum, _mm_unpackhi_epi16 (m2, m1));
sum = _mm_add_epi32 (sum, _mm_madd_epi16 (ta, tb));
}
sum = _mm_srai_epi32 (sum, PRECISION_S16);
sum = _mm_madd_epi16 (sum, f);
@ -200,7 +196,7 @@ inner_product_gint16_cubic_1_sse2 (gint16 * o, const gint16 * a,
const gint16 * b, gint len, const gint16 * icoeff, gint oversample)
{
gint i = 0;
__m128i sum, ta, tb, m1, m2;
__m128i sum, ta, tb;
__m128i f = _mm_cvtsi64_si128 (*((long long*)icoeff));
sum = _mm_setzero_si128 ();
@ -208,16 +204,13 @@ inner_product_gint16_cubic_1_sse2 (gint16 * o, const gint16 * a,
for (; i < len; i += 2) {
ta = _mm_cvtsi32_si128 (*(gint32*)(a + i));
ta = _mm_unpacklo_epi16 (ta, ta);
ta = _mm_unpacklo_epi16 (ta, ta);
ta = _mm_unpacklo_epi32 (ta, ta);
ta = _mm_unpacklo_epi32 (ta, ta);
tb = _mm_load_si128 ((__m128i *) (b + 4 * i + 0));
tb = _mm_unpacklo_epi16 (_mm_cvtsi64_si128 (*(gint64*)(b + 4 * i + 0)),
_mm_cvtsi64_si128 (*(gint64*)(b + 4 * i + 4)));
m1 = _mm_mulhi_epi16 (ta, tb);
m2 = _mm_mullo_epi16 (ta, tb);
sum = _mm_add_epi32 (sum, _mm_unpacklo_epi16 (m2, m1));
sum = _mm_add_epi32 (sum, _mm_unpackhi_epi16 (m2, m1));
sum = _mm_add_epi32 (sum, _mm_madd_epi16 (ta, tb));
}
sum = _mm_srai_epi32 (sum, PRECISION_S16);
sum = _mm_madd_epi16 (sum, f);

4
gst-libs/gst/audio/audio-resampler.c
View file

@ -354,7 +354,7 @@ convert_taps_##type (gdouble *tmpcoeff, type *taps, \
for (i = 0; i < 32; i++) { \
gint64 sum = 0; \
for (j = 0; j < n_taps; j++) \
sum += taps[j] = floor (offset + tmpcoeff[j] * multiplier / weight); \
sum += floor (offset + tmpcoeff[j] * multiplier / weight); \
if (sum == (1 << precision)) { \
exact = TRUE; \
break; \
@ -371,6 +371,8 @@ convert_taps_##type (gdouble *tmpcoeff, type *taps, \
offset -= (h_offset - l_offset) / 2; \
} \
} \
for (j = 0; j < n_taps; j++) \
taps[j] = floor (offset + tmpcoeff[j] * multiplier / weight); \
if (!exact) \
GST_WARNING ("can't find exact taps"); \
}