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avcodec/flac_parser: avoid returning too negative number

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If return value is very small parser code will assert.
This commit is contained in:
Paul B Mahol 2022-09-08 09:59:09 +02:00
parent 9ad3db3ad9
commit cf2cf31805
1 changed files with 5 additions and 2 deletions
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7
libavcodec/flac_parser.c
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@ -663,8 +663,11 @@ static int get_best_header(FLACParseContext *fpc, const uint8_t **poutbuf,
/* Return the negative overread index so the client can compute pos.
This should be the amount overread to the beginning of the child */
if (child)
return child->offset - flac_fifo_size(&fpc->fifo_buf);
if (child) {
int64_t offset = child->offset - flac_fifo_size(&fpc->fifo_buf);
if (offset > -(1 << 28))
return offset;
}
return 0;
}