[FFmpeg-devel] [PATCH 1/2] checkasm/flacdsp: add LPC test

[Rémi Denis-Courmont]

Le keskiviikkona 15. marraskuuta 2023, 21.14.26 EET James Almer a écrit :
> On 11/15/2023 3:02 PM, Rémi Denis-Courmont wrote:
> > ---
> > 
> >   tests/checkasm/flacdsp.c | 32 ++++++++++++++++++++++++++++++++
> >   1 file changed, 32 insertions(+)
> > 
> > diff --git a/tests/checkasm/flacdsp.c b/tests/checkasm/flacdsp.c
> > index 51a0e0060b..4d69cbe507 100644
> > --- a/tests/checkasm/flacdsp.c
> > +++ b/tests/checkasm/flacdsp.c
> > @@ -54,6 +54,28 @@ static void check_decorrelate(uint8_t **ref_dst,
> > uint8_t **ref_src, uint8_t **ne> 
> >       bench_new(new_dst, (int32_t **)new_src, channels, BUF_SIZE /
> >       sizeof(int32_t), 8);>   
> >   }
> > 
> > +static void check_lpc(FLACDSPContext *c, int pred_order)
> 
> c is unused.
> 
> > +{
> > +    int qlevel = rnd() % 16;
> > +    LOCAL_ALIGNED_16(int32_t, coeffs, [32]);
> > +    LOCAL_ALIGNED_16(int32_t, dst0, [BUF_SIZE]);
> > +    LOCAL_ALIGNED_16(int32_t, dst1, [BUF_SIZE]);
> > +
> > +    declare_func(void, int32_t *, const int[32], int, int, int);
> > +
> > +    for (int i = 0; i < 32; i++)
> > +        coeffs[i] = rnd();
> > +    for (int i = 0; i < BUF_SIZE; i++)
> > +        dst0[i] = rnd();
> > +
> > +    memcpy(dst1, dst0, BUF_SIZE * sizeof (int32_t));
> > +    call_ref(dst0, coeffs, pred_order, qlevel, BUF_SIZE);
> > +    call_new(dst1, coeffs, pred_order, qlevel, BUF_SIZE);
> > +    if (memcmp(dst0, dst1, BUF_SIZE * sizeof (int32_t)) != 0)
> > +       fail();
> > +    bench_new(dst1, coeffs, pred_order, qlevel, BUF_SIZE);
> 
> Not sure if it matters, but dst1 is already trashed by call_new().

Yeah I know. I could allocate a third buffer. AFAICT, the only parameter that 
should affect the benchmarks is pred-order (which indeed affects the result on 
both x86 and RVV). So that the extra code to preserve dst seemed pointless?

> 
> > +}
> > +
> > 
> >   void checkasm_check_flacdsp(void)
> >   {
> >   
> >       LOCAL_ALIGNED_16(uint8_t, ref_dst, [BUF_SIZE*MAX_CHANNELS]);
> > 
> > @@ -72,6 +94,7 @@ void checkasm_check_flacdsp(void)
> > 
> >           { AV_SAMPLE_FMT_S16, 16 },
> >           { AV_SAMPLE_FMT_S32, 32 },
> >       
> >       };
> > 
> > +    static const signed char pred_orders[] = { 13, 16, 29, 32 };
> > 
> >       FLACDSPContext h;
> >       int i, j;
> > 
> > @@ -88,4 +111,13 @@ void checkasm_check_flacdsp(void)
> > 
> >       }
> >       
> >       report("decorrelate");
> > 
> > +
> > +    for (int i = 0; i < sizeof (pred_orders); i++) {
> 
> i is already defined. Also, use FF_ARRAY_ELEMS(pred_orders), so it
> doesn't depend on char being 1 byte.
> 
> > +        if (check_func(h.lpc16, "flac_lpc_16_%d", pred_orders[i]))
> > +            check_lpc(&h, pred_orders[i]);
> > +        if (check_func(h.lpc32, "flac_lpc_32_%d", pred_orders[i]))
> > +            check_lpc(&h, pred_orders[i]);
> > +    }
> > +
> > +    report("lpc");
> > 
> >   }
> 
> LGTM otherwise.
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