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GetBackwardReferences: fail on alloc error

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previously failures in the call to
VP8LBackwardReferencesTraceBackwards() would be ignored which, though it
wouldn't result in a crash, would produce non-deterministic output

Change-Id: Id9890a60883c3270ec75e968506d46eea32b76d4
(cherry picked from commit e3cfafaf71)
(cherry picked from commit 20ef03ee35)
(cherry picked from commit 89e226a3c7)
This commit is contained in:
James Zern 2022-04-04 10:47:40 -07:00
parent 3180b6f4b7
commit 7b75522d5e
1 changed files with 7 additions and 6 deletions
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7
src/enc/backward_references_enc.c
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@ -911,14 +911,15 @@ static VP8LBackwardRefs* GetBackwardReferences(
quality >= 25) { quality >= 25) {
const VP8LHashChain* const hash_chain_tmp = const VP8LHashChain* const hash_chain_tmp =
(lz77_type_best == kLZ77Standard) ? hash_chain : &hash_chain_box; (lz77_type_best == kLZ77Standard) ? hash_chain : &hash_chain_box;
if (VP8LBackwardReferencesTraceBackwards(width, height, argb, *cache_bits,
hash_chain_tmp, best, worst)) {
double bit_cost_trace; double bit_cost_trace;
if (!VP8LBackwardReferencesTraceBackwards(width, height, argb, *cache_bits,
hash_chain_tmp, best, worst)) {
goto Error;
}
VP8LHistogramCreate(histo, worst, *cache_bits); VP8LHistogramCreate(histo, worst, *cache_bits);
bit_cost_trace = VP8LHistogramEstimateBits(histo); bit_cost_trace = VP8LHistogramEstimateBits(histo);
if (bit_cost_trace < bit_cost_best) best = worst; if (bit_cost_trace < bit_cost_best) best = worst;
} }
}
BackwardReferences2DLocality(width, best); BackwardReferences2DLocality(width, best);