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id3v2enc: add support for year and day/month tags when writing id3v2 version 3 metadata

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Adds support for year (TYER) and day/month (TDAT) tags when writing
id3v2 version 3 metadata by splitting the "date" tag. The date tag
should have a format of "YYYY-MM-DD" or "YYYY".

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Tobias Rapp 2011-11-02 11:50:14 +01:00 committed by Michael Niedermayer
parent 971e710438
commit f2e7ee9bf9
1 changed files with 42 additions and 1 deletions
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43
libavformat/id3v2enc.c
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@ -20,6 +20,7 @@
#include <stdint.h>
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
@ -97,6 +98,44 @@ static int id3v2_check_write_tag(AVFormatContext *s, AVDictionaryEntry *t, const
return -1;
}
static void id3v2_3_metadata_split_date(AVDictionary **pm)
{
AVDictionaryEntry *mtag = NULL;
AVDictionary *dst = NULL;
const char *key, *value;
char year[5] = {0}, day_month[5] = {0};
int i;
while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) {
key = mtag->key;
if (!strcasecmp(key, "date")) {
/* split date tag using "YYYY-MM-DD" format into year and month/day segments */
value = mtag->value;
i = 0;
while (value[i] >= '0' && value[i] <= '9') i++;
if (value[i] == '\0' || value[i] == '-') {
av_strlcpy(year, value, sizeof(year));
av_dict_set(&dst, "TYER", year, 0);
if (value[i] == '-' &&
value[i+1] >= '0' && value[i+1] <= '1' &&
value[i+2] >= '0' && value[i+2] <= '9' &&
value[i+3] == '-' &&
value[i+4] >= '0' && value[i+4] <= '3' &&
value[i+5] >= '0' && value[i+5] <= '9' &&
(value[i+6] == '\0' || value[i+6] == ' ')) {
snprintf(day_month, sizeof(day_month), "%.2s%.2s", value + i + 4, value + i + 1);
av_dict_set(&dst, "TDAT", day_month, 0);
}
} else
av_dict_set(&dst, key, value, 0);
} else
av_dict_set(&dst, key, mtag->value, 0);
}
av_dict_free(pm);
*pm = dst;
}
int ff_id3v2_write(struct AVFormatContext *s, int id3v2_version,
const char *magic)
{
@ -116,7 +155,9 @@ int ff_id3v2_write(struct AVFormatContext *s, int id3v2_version,
avio_wb32(s->pb, 0);
ff_metadata_conv(&s->metadata, ff_id3v2_34_metadata_conv, NULL);
if (id3v2_version == 4)
if (id3v2_version == 3)
id3v2_3_metadata_split_date(&s->metadata);
else if (id3v2_version == 4)
ff_metadata_conv(&s->metadata, ff_id3v2_4_metadata_conv, NULL);
while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {