On Fri, Nov 07, 2014 at 04:08:08PM +0100, Nedeljko Babic wrote: > From: Djordje Pesut <djordje.pe...@imgtec.com> > > Add fixed point implementation [...]
> diff --git a/libavutil/fixed_dsp.h b/libavutil/fixed_dsp.h
> index ff6f365..3035d19 100644
> --- a/libavutil/fixed_dsp.h
> +++ b/libavutil/fixed_dsp.h
> @@ -54,6 +54,25 @@
> #include "libavcodec/mathops.h"
>
> typedef struct AVFixedDSPContext {
> + /* assume len is a multiple of 16, and arrays are 32-byte aligned */
> +
> + /**
> + * Calculate the product of two vectors of integers and store the result
> in
> + * a vector of integers.
vector_fmul works with fixed point numbers or scales down integers
it doesnt just multiply them
> + *
> + * @param dst output vector
> + * constraints: 32-byte aligned
> + * @param src0 first input vector
> + * constraints: 32-byte aligned
> + * @param src1 second input vector
> + * constraints: 32-byte aligned
> + * @param len number of elements in the input
> + * constraints: multiple of 16
> + */
> + void (*vector_fmul)(int *dst, const int *src0, const int *src1,
> + int len);
this breaks ABI, new fields can only be added at the end
> +
> + void (*vector_fmul_reverse)(int *dst, const int *src0, const int *src1,
> int len);
> /**
> * Overlap/add with window function.
> * Used primarily by MDCT-based audio codecs.
> @@ -92,6 +111,40 @@ typedef struct AVFixedDSPContext {
> */
> void (*vector_fmul_window)(int32_t *dst, const int32_t *src0, const
> int32_t *src1, const int32_t *win, int len);
>
> + /**
> + * Calculate the product of two vectors of integers, add a third vector
> of
> + * integers and store the result in a vector of integers.
> + *
> + * @param dst output vector
> + * constraints: 32-byte aligned
> + * @param src0 first input vector
> + * constraints: 32-byte aligned
> + * @param src1 second input vector
> + * constraints: 32-byte aligned
> + * @param src1 third input vector
> + * constraints: 32-byte aligned
> + * @param len number of elements in the input
> + * constraints: multiple of 16
> + */
> + void (*vector_fmul_add)(int *dst, const int *src0, const int *src1,
> + const int *src2, int len);
> +
> + /**
> + * Calculate the scalar product of two vectors of floats.
floats ? scalarproduct_fixed?
> + * @param v1 first vector, 16-byte aligned
> + * @param v2 second vector, 16-byte aligned
> + * @param len length of vectors, multiple of 4
> + */
> + int (*scalarproduct_fixed)(const int *v1, const int *v2, int len);
> +
> + /**
> + * Calculate the sum and difference of two vectors of integers.
> + *
> + * @param v1 first input vector, sum output, 16-byte aligned
> + * @param v2 second input vector, difference output, 16-byte aligned
> + * @param len length of vectors, multiple of 4
> + */
> + void (*butterflies_fixed)(int *av_restrict v1, int *av_restrict v2, int
> len);
> } AVFixedDSPContext;
>
> /**
> --
> 1.8.2.1
>
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--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
While the State exists there can be no freedom; when there is freedom there
will be no State. -- Vladimir Lenin
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