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avcodec/bsf: switch to av_get_token to parse bsf list string

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The recently added setts bsf makes use of the eval API whose
expressions can contain commas. The existing parsing in
av_bsf_list_parse_str() uses av_strtok to naively split
the string at commas, thus preventing the use of setts filter
with expressions containing commas.

av_get_token can work with escaped commas, allowing full use of setts.
This commit is contained in:
Gyan Doshi 2021-07-03 17:02:59 +05:30
parent 70874e024a
commit 301d275301
1 changed files with 4 additions and 11 deletions
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15
libavcodec/bsf.c
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@ -520,7 +520,6 @@ static int bsf_parse_single(char *str, AVBSFList *bsf_lst)
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
{
AVBSFList *lst;
char *bsf_str, *buf, *dup, *saveptr;
int ret;
if (!str)
@ -530,24 +529,18 @@ int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
if (!lst)
return AVERROR(ENOMEM);
if (!(dup = buf = av_strdup(str))) {
ret = AVERROR(ENOMEM);
goto end;
}
while (bsf_str = av_strtok(buf, ",", &saveptr)) {
do {
char *bsf_str = av_get_token(&str, ",");
ret = bsf_parse_single(bsf_str, lst);
av_free(bsf_str);
if (ret < 0)
goto end;
buf = NULL;
}
} while (*str && *++str);
ret = av_bsf_list_finalize(&lst, bsf_lst);
end:
if (ret < 0)
av_bsf_list_free(&lst);
av_free(dup);
return ret;
}