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Revert "buffering: remove bufgettail/bufcuttail"

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This reverts commit 9e93796407.

Fixes FS#13626, which is caused by non-audio ID3v1/APE tags at
the end of the audio data stream.

Change-Id: Ic69af14a5d1264b7896a54b5f2ad314022dd98ac
This commit is contained in:
Solomon Peachy 2025-05-20 07:33:10 -04:00
parent 3cb4e63253
commit 2bd88936f7
5 changed files with 107 additions and 2 deletions
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38
lib/rbcodec/metadata/metadata.c
View file

@ -499,6 +499,44 @@ bool get_metadata(struct mp3entry* id3, int fd, const char* trackname)
return get_metadata_ex(id3, fd, trackname, 0);
}
#ifndef __PCTOOL__
void strip_tags(int handle_id)
{
static const unsigned char tag[] = "TAG";
static const unsigned char apetag[] = "APETAGEX";
size_t len, version;
void *tail;
if (bufgettail(handle_id, 128, &tail) != 128)
return;
if (memcmp(tail, tag, 3) == 0)
{
/* Skip id3v1 tag */
logf("Cutting off ID3v1 tag");
bufcuttail(handle_id, 128);
}
/* Get a new tail, as the old one may have been cut */
if (bufgettail(handle_id, 32, &tail) != 32)
return;
/* Check for APE tag (look for the APE tag footer) */
if (memcmp(tail, apetag, 8) != 0)
return;
/* Read the version and length from the footer */
version = get_long_le(&((unsigned char *)tail)[8]);
len = get_long_le(&((unsigned char *)tail)[12]);
if (version == 2000)
len += 32; /* APEv2 has a 32 byte header */
/* Skip APE tag */
logf("Cutting off APE tag (%ldB)", len);
bufcuttail(handle_id, len);
}
#endif /* ! __PCTOOL__ */
#define MOVE_ENTRY(x) if (x) x += offset;
void adjust_mp3entry(struct mp3entry *entry, void *dest, const void *orig)

1
lib/rbcodec/metadata/metadata.h
View file

@ -338,6 +338,7 @@ void wipe_mp3entry(struct mp3entry *id3);
void fill_metadata_from_path(struct mp3entry *id3, const char *trackname);
int get_audio_base_codec_type(int type);
const char * get_codec_string(int type);
void strip_tags(int handle_id);
bool rbcodec_format_is_atomic(int afmt);
bool format_buffers_with_offset(int afmt);