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Revert "lavf/id3v2dec: support multiple values and TIPL frames"

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see: Re: [FFmpeg-devel] [PATCH 2/2] avformat/id3v2: Check that decode_str() did advance

but in short, first our API since 16years says we dont have multiple values per key
(which it supports since 9 years only)

and it causes some problems for ffprobe apparently.
I do believe the original patch is the correct direction but it requires
more changes. So revert this until other things are in place and until
we have a consensus.

This reverts commit 80b77e8e8d0630710ad6069133f397459015f139.
This commit is contained in:
Michael Niedermayer 2025-04-16 03:20:14 +02:00
parent cf7dfddee4
commit 058d49b168
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 24 additions and 31 deletions
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55
libavformat/id3v2.c
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@ -327,12 +327,8 @@ static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
AVDictionary **metadata, const char *key)
{
uint8_t *dst;
uint8_t *dst_key = NULL;
int encoding, dict_flags = AV_DICT_MULTIKEY | AV_DICT_DONT_STRDUP_VAL | AV_DICT_DEDUP;
int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
unsigned genre;
int count = 0;
int is_tipl = !(strcmp(key, "TIPL") && strcmp(key, "TMCL") &&
strcmp(key, "IPL"));
if (taglen < 1)
return;
@ -340,33 +336,30 @@ static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
encoding = avio_r8(pb);
taglen--; /* account for encoding type byte */
while (taglen > 1) {
if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
return;
}
count++;
if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
(sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
genre <= ID3v1_GENRE_MAX) {
av_freep(&dst);
dst = av_strdup(ff_id3v1_genre_str[genre]);
} else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX")) ||
(is_tipl && (count & 1))) {
/* dst now contains the key, need to get value */
av_free(dst_key);
key = dst_key = dst;
continue;
} else if (!*dst)
av_freep(&dst);
if (dst)
av_dict_set(metadata, key, dst, dict_flags);
if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
return;
}
av_free(dst_key);
if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
(sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
genre <= ID3v1_GENRE_MAX) {
av_freep(&dst);
dst = av_strdup(ff_id3v1_genre_str[genre]);
} else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
/* dst now contains the key, need to get value */
key = dst;
if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
av_freep(&key);
return;
}
dict_flags |= AV_DICT_DONT_STRDUP_KEY;
} else if (!*dst)
av_freep(&dst);
if (dst)
av_dict_set(metadata, key, dst, dict_flags);
}
static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen,
@ -1051,7 +1044,7 @@ static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
pbx = &pb_local.pub; // read from sync buffer
}
#endif
if (tag[0] == 'T' || !strcmp(tag, "IPL"))
if (tag[0] == 'T')
/* parse text tag */
read_ttag(s, pbx, tlen, metadata, tag);
else if (!memcmp(tag, "USLT", 4))