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Adds a fuzzing mode that causes the encoder to make random decisions

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This commit is contained in:
Jean-Marc Valin 2011-08-11 16:21:58 -04:00
parent c2d86f0639
commit f334c82ec3
7 changed files with 70 additions and 0 deletions
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28
libcelt/celt.c
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@ -387,6 +387,9 @@ static int transient_analysis(const opus_val32 * restrict in, int len, int C,
is_transient=1;
}
RESTORE_STACK;
#ifdef FUZZING
is_transient = rand()&0x1;
#endif
return is_transient;
}
@ -709,6 +712,12 @@ static int tf_analysis(const CELTMode *m, int len, int C, int isTransient,
tf_res[i] = path0[i+1];
}
RESTORE_STACK;
#ifdef FUZZING
tf_select = rand()&0x1;
tf_res[0] = rand()&0x1;
for (i=1;i<len;i++)
tf_res[i] = tf_res[i-1] ^ ((rand()&0xF) == 0);
#endif
return tf_select;
}
@ -857,6 +866,9 @@ static int alloc_trim_analysis(const CELTMode *m, const celt_norm *X,
trim_index = 0;
if (trim_index>10)
trim_index = 10;
#ifdef FUZZING
trim_index = rand()%11;
#endif
return trim_index;
}
@ -1102,6 +1114,10 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, i
CELT_COPY(pre[c]+COMBFILTER_MAXPERIOD, in+c*(N+st->overlap)+st->overlap, N);
} while (++c<CC);
#ifdef FUZZING
if ((rand()&0x3F)==0)
silence = 1;
#endif
if (tell==1)
ec_enc_bit_logp(enc, silence, 15);
else
@ -1332,10 +1348,19 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, i
if (C==2)
d2 = HALF32(d2 + 2*bandLogE[i+st->mode->nbEBands]-
bandLogE[i-1+st->mode->nbEBands]-bandLogE[i+1+st->mode->nbEBands]);
#ifdef FUZZING
if((rand()&0xF)==0)
{
offsets[i] += 1;
if((rand()&0x3)==0)
offsets[i] += 1+(rand()&0x3);
}
#else
if (d2 > SHL16(t1,DB_SHIFT))
offsets[i] += 1;
if (d2 > SHL16(t2,DB_SHIFT))
offsets[i] += 1;
#endif
}
}
dynalloc_logp = 6;
@ -1527,6 +1552,9 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, i
if (anti_collapse_rsv > 0)
{
anti_collapse_on = st->consec_transient<2;
#ifdef FUZZING
anti_collapse_on = rand()&0x1;
#endif
ec_enc_bits(enc, anti_collapse_on, 1);
}
quant_energy_finalise(st->mode, st->start, st->end, oldBandE, error, fine_quant, fine_priority, nbCompressedBytes*8-ec_tell(enc), enc, C);