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.
---
doc/APIchanges | 3 +++
libavutil/float_dsp.c | 12 ++++++++++++
libavutil/float_dsp.h | 14 ++++++++++++++
libavutil/version.h | 2 +-
4 files changed, 30 insertions(+), 1 deletion(-)
diff --git a/doc/APIchanges b/doc/APIchanges
index 60f056b863..50c51c664f 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -2,6 +2,9 @@ The last version increases of all libraries were on 2024-03-07
API changes, most recent first:
+2024-05-29 - xxxxxxxxxx - lavu 59.21.100 - float_dsp.h
+ Add AVFloatDSPContext.scalarproduct_double.
+
2024-05-23 - xxxxxxxxxx - lavu 59.20.100 - channel_layout.h
Add av_channel_layout_ambisonic_order().
diff --git a/libavutil/float_dsp.c b/libavutil/float_dsp.c
index e9fb023466..1c5bb05636 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;
}
+static 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;
+}
+
av_cold AVFloatDSPContext *avpriv_float_dsp_alloc(int bit_exact)
{
AVFloatDSPContext *fdsp = av_mallocz(sizeof(AVFloatDSPContext));
@@ -149,6 +160,7 @@ av_cold AVFloatDSPContext *avpriv_float_dsp_alloc(int
bit_exact)
fdsp->vector_fmul_reverse = vector_fmul_reverse_c;
fdsp->butterflies_float = butterflies_float_c;
fdsp->scalarproduct_float = avpriv_scalarproduct_float_c;
+ fdsp->scalarproduct_double = ff_scalarproduct_double_c;
#if ARCH_AARCH64
ff_float_dsp_init_aarch64(fdsp);
diff --git a/libavutil/float_dsp.h b/libavutil/float_dsp.h
index 342a8715c5..b6b5b0a3b3 100644
--- a/libavutil/float_dsp.h
+++ b/libavutil/float_dsp.h
@@ -19,6 +19,8 @@
#ifndef AVUTIL_FLOAT_DSP_H
#define AVUTIL_FLOAT_DSP_H
+#include <stddef.h>
+
typedef struct AVFloatDSPContext {
/**
* Calculate the entry wise product of two vectors of floats and store the
result in
@@ -187,6 +189,18 @@ typedef struct AVFloatDSPContext {
*/
void (*vector_dmul)(double *dst, const double *src0, const double *src1,
int len);
+
+ /**
+ * Calculate the scalar product of two vectors of doubles.
+ *
+ * @param v1 first vector
+ * @param v2 second vector
+ * @param len length of vectors
+ *
+ * @return inner product of the vectors
+ */
+ double (*scalarproduct_double)(const double *v1, const double *v2,
+ size_t len);
} AVFloatDSPContext;
/**
diff --git a/libavutil/version.h b/libavutil/version.h
index 9c7146c228..9d08d56884 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -79,7 +79,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 59
-#define LIBAVUTIL_VERSION_MINOR 20
+#define LIBAVUTIL_VERSION_MINOR 21
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
--
2.45.1
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