On Mon, Jun 01, 2015 at 01:23:53PM +0000, Nedeljko Babic wrote:
> > Added functions needed for implementation of fixed point aac dec.
[...]
> >> +
> >> AVFixedDSPContext * avpriv_alloc_fixed_dsp(int bit_exact)
> >> {
> >> AVFixedDSPContext * fdsp = av_malloc(sizeof(AVFixedDSPContext));
> >> @@ -97,6 +152,11 @@ AVFixedDSPContext * avpriv_alloc_fixed_dsp(int
> >> bit_exact)
> >>
> >> fdsp->vector_fmul_window_scaled = vector_fmul_window_scaled_c;
> >> fdsp->vector_fmul_window = vector_fmul_window_c;
> >> + fdsp->vector_fmul = vector_fmul_c;
> >> + fdsp->vector_fmul_add = vector_fmul_add_c;
> >> + fdsp->vector_fmul_reverse = vector_fmul_reverse_c;
> >> + fdsp->butterflies_fixed = butterflies_fixed_c;
> >> + fdsp->scalarproduct_fixed = ff_scalarproduct_fixed_c;
> >>
> >> return fdsp;
> >> }
> >> diff --git a/libavutil/fixed_dsp.h b/libavutil/fixed_dsp.h
> >> index ff6f365..73859c0 100644
> >> --- a/libavutil/fixed_dsp.h
> >> +++ b/libavutil/fixed_dsp.h
> >> @@ -54,6 +54,8 @@
> >> #include "libavcodec/mathops.h"
> >>
> >> typedef struct AVFixedDSPContext {
> >> + /* assume len is a multiple of 16, and arrays are 32-byte aligned */
> >> +
> >> /**
> >> * Overlap/add with window function.
> >> * Used primarily by MDCT-based audio codecs.
> >> @@ -92,6 +94,57 @@ typedef struct AVFixedDSPContext {
> >> */
> >> void (*vector_fmul_window)(int32_t *dst, const int32_t *src0, const
> >> int32_t *src1, const int32_t *win, int len);
> >>
> >> + /**
> >
> >> + * Fixed-point multiplication that calculates the product of two
> >> vectors of
> >> + * integers and stores the result in a vector of integers.
> >
> >"the product of 2 vectors" is not a clearly defined operation
> >there are many products, the dot product is the most commonly used
> >possibly but thats not what this function does, what you mean is the
> >element or component wise multiplication
> >
>
> The definition for this function (as for most of the other functions) is
> basically the same as the definition for the similar function given in the
> float_dsp.h adjusted for the fixed point version.uhm, i did not realize this, ill fix the wording in float_dsp.h in a moment. [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Opposition brings concord. Out of discord comes the fairest harmony. -- Heraclitus
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