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fftools/cmdutils: tighten condition for media type stream specifiers

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Require the character indicating media type to be followed by a
non-alphanumeric character (or end of string).

Needed by future syntax extensions.
This commit is contained in:
Anton Khirnov 2024-08-08 17:35:55 +02:00
parent 8707c8660d
commit 00f5a34c9a
1 changed files with 9 additions and 2 deletions
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11
fftools/cmdutils.c
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@ -988,6 +988,12 @@ FILE *get_preset_file(char *filename, size_t filename_size,
return f;
}
static int cmdutils_isalnum(char c)
{
return (c >= '0' && c <= '9') ||
(c >= 'A' && c <= 'Z') ||
(c >= 'a' && c <= 'z');
}
void stream_specifier_uninit(StreamSpecifier *ss)
{
@ -1024,8 +1030,9 @@ int stream_specifier_parse(StreamSpecifier *ss, const char *spec,
// this terminates the specifier
break;
} else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
*spec == 't' || *spec == 'V') { /* opt:[vasdtV] */
} else if ((*spec == 'v' || *spec == 'a' || *spec == 's' ||
*spec == 'd' || *spec == 't' || *spec == 'V') &&
!cmdutils_isalnum(*(spec + 1))) { /* opt:[vasdtV] */
if (ss->media_type != AVMEDIA_TYPE_UNKNOWN) {
av_log(logctx, AV_LOG_ERROR, "Stream type specified multiple times\n");
ret = AVERROR(EINVAL);