On 5/30/2024 4:31 PM, Rémi Denis-Courmont wrote:
Le torstaina 30. toukokuuta 2024, 22.06.55 EEST Rémi Denis-Courmont a écrit :
The function pointer is appended to the structure for backward binary
compatibility. Fortunately, this is allocated by libavutil, not by the
user, so increasing the structure size is safe.
---
libavutil/float_dsp.c | 12 ++++++++++++
libavutil/float_dsp.h | 31 ++++++++++++++++++++++++++++++-
2 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/libavutil/float_dsp.c b/libavutil/float_dsp.c
index e9fb023466..08bbc85e3e 100644
--- a/libavutil/float_dsp.c
+++ b/libavutil/float_dsp.c
@@ -132,6 +132,17 @@ float avpriv_scalarproduct_float_c(const float *v1,
const float *v2, int len) return p;
}
+double ff_scalarproduct_double_c(const double *v1, const double *v2,
+ size_t len)
+{
+ double p = 0.0;
+
+ for (size_t i = 0; i < len; i++)
+ p += v1[i] * v2[i];
+
+ return p;
+}
+
If somebody wants to write x86 assembly, they can probably borrow most of the
code for evaluate_lls. It is a double precision scalar product with a little
bit of extra fluff in the prologue.
I already did, I'm just waiting for this set to be pushed before sending it.
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