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Merge "VP8BitReaderSetBuffer: move NULL check to call site" into main

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This commit is contained in:
James Zern 2025-06-24 12:45:57 -07:00 committed by Gerrit Code Review
commit 23ce76fa37
2 changed files with 13 additions and 8 deletions
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10
src/dec/idec_dec.c
View File

@ -141,8 +141,14 @@ static void DoRemap(WebPIDecoder* const idec, ptrdiff_t offset) {
}
{
const uint8_t* const last_start = dec->parts[last_part].buf;
VP8BitReaderSetBuffer(&dec->parts[last_part], last_start,
mem->buf + mem->end - last_start);
// 'last_start' will be NULL when 'idec->state' is < STATE_VP8_PARTS0
// and through a portion of that state (when there isn't enough data to
// parse the partitions). The bitreader is only used meaningfully when
// there is enough data to begin parsing partition 0.
if (last_start != NULL) {
VP8BitReaderSetBuffer(&dec->parts[last_part], last_start,
mem->buf + mem->end - last_start);
}
}
if (NeedCompressedAlpha(idec)) {
ALPHDecoder* const alph_dec = dec->alph_dec;

11
src/utils/bit_reader_utils.c
View File

@ -31,12 +31,11 @@
void VP8BitReaderSetBuffer(VP8BitReader* const br,
const uint8_t* const start,
size_t size) {
if (start != NULL) {
br->buf = start;
br->buf_end = start + size;
br->buf_max =
(size >= sizeof(lbit_t)) ? start + size - sizeof(lbit_t) + 1 : start;
}
assert(start != NULL);
br->buf = start;
br->buf_end = start + size;
br->buf_max =
(size >= sizeof(lbit_t)) ? start + size - sizeof(lbit_t) + 1 : start;
}
void VP8InitBitReader(VP8BitReader* const br,