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handle non-vla compilers #219

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handle non-vla compilers #219

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11 changes: 11 additions & 0 deletions src/arch.h
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Original file line number Diff line number Diff line change
Expand Up @@ -258,4 +258,15 @@ static OPUS_INLINE int celt_isnan(float x)
#endif
#endif

#if __STDC_VERSION__ < 199901L || (__STDC_VERSION__ > 201000L && __STDC_NO_VLA__ == 1)
#define NO_VLA
#endif

#ifdef NO_VLA
#include <malloc.h>
#define stackalloc(type, id, len) type *id = alloca(len)
#else
#define stackalloc(type, id, len) type id[len]
#endif

#endif /* ARCH_H */
8 changes: 4 additions & 4 deletions src/celt_lpc.c
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Expand Up @@ -96,7 +96,7 @@ void celt_fir(
int ord)
{
int i,j;
opus_val16 rnum[ord];
stackalloc(opus_val16, rnum, ord);
for(i=0;i<ord;i++)
rnum[i] = num[ord-i-1];
for (i=0;i<N-3;i+=4)
Expand Down Expand Up @@ -147,8 +147,8 @@ void celt_iir(const opus_val32 *_x,
#else
int i,j;
celt_assert((ord&3)==0);
opus_val16 rden[ord];
opus_val16 y[N+ord];
stackalloc(opus_val16, rden, ord);
stackalloc(opus_val16, y, N+ord);
for(i=0;i<ord;i++)
rden[i] = den[ord-i-1];
for(i=0;i<ord;i++)
Expand Down Expand Up @@ -208,7 +208,7 @@ int _celt_autocorr(
int fastN=n-lag;
int shift;
const opus_val16 *xptr;
opus_val16 xx[n];
stackalloc(opus_val16, xx, n);
celt_assert(n>0);
celt_assert(overlap>=0);
if (overlap == 0)
Expand Down
8 changes: 4 additions & 4 deletions src/pitch.c
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Expand Up @@ -297,9 +297,9 @@ void pitch_search(const opus_val16 *x_lp, opus_val16 *y,
celt_assert(max_pitch>0);
lag = len+max_pitch;

opus_val16 x_lp4[len>>2];
opus_val16 y_lp4[lag>>2];
opus_val32 xcorr[max_pitch>>1];
stackalloc(opus_val16, x_lp4, len>>2);
stackalloc(opus_val16, y_lp4, lag>>2);
stackalloc(opus_val32, xcorr, max_pitch>>1);

/* Downsample by 2 again */
for (j=0;j<len>>2;j++)
Expand Down Expand Up @@ -443,7 +443,7 @@ opus_val16 remove_doubling(opus_val16 *x, int maxperiod, int minperiod,
*T0_=maxperiod-1;

T = T0 = *T0_;
opus_val32 yy_lookup[maxperiod+1];
stackalloc(opus_val32, yy_lookup, maxperiod+1);
dual_inner_prod(x, x, x-T0, N, &xx, &xy);
yy_lookup[0] = xx;
yy=xx;
Expand Down