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mp3enc: support for id3v2.3 tags using a per-muxer AVOption

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fixes issue2562.

Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
This commit is contained in:
Anton Khirnov 2011-01-21 19:54:35 +00:00 committed by Janne Grunau
parent cb6bc57681
commit 22272f61bb
1 changed files with 36 additions and 11 deletions
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47
libavformat/mp3enc.c
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@ -24,6 +24,7 @@
#include "id3v1.h"
#include "id3v2.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
static int id3v1_set_string(AVFormatContext *s, const char *key,
uint8_t *buf, int buf_size)
@ -148,7 +149,26 @@ AVOutputFormat mp2_muxer = {
#endif
#if CONFIG_MP3_MUXER
static int id3v2_check_write_tag(AVFormatContext *s, AVMetadataTag *t, const char table[][4])
typedef struct MP3Context {
const AVClass *class;
int id3v2_version;
} MP3Context;
static const AVOption options[] = {
{ "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
offsetof(MP3Context, id3v2_version), FF_OPT_TYPE_INT, 4, 3, 4, AV_OPT_FLAG_ENCODING_PARAM},
{ NULL },
};
static const AVClass mp3_muxer_class = {
"MP3 muxer",
av_default_item_name,
options,
LIBAVUTIL_VERSION_INT,
};
static int id3v2_check_write_tag(AVFormatContext *s, AVMetadataTag *t, const char table[][4],
enum ID3v2Encoding enc)
{
uint32_t tag;
int i;
@ -158,21 +178,23 @@ static int id3v2_check_write_tag(AVFormatContext *s, AVMetadataTag *t, const cha
tag = AV_RB32(t->key);
for (i = 0; *table[i]; i++)
if (tag == AV_RB32(table[i]))
return id3v2_put_ttag(s, t->value, NULL, tag, ID3v2_ENCODING_UTF8);
return id3v2_put_ttag(s, t->value, NULL, tag, enc);
return -1;
}
/**
* Write an ID3v2.4 header at beginning of stream
* Write an ID3v2 header at beginning of stream
*/
static int mp3_write_header(struct AVFormatContext *s)
{
MP3Context *mp3 = s->priv_data;
AVMetadataTag *t = NULL;
int totlen = 0;
int totlen = 0, enc = mp3->id3v2_version == 3 ? ID3v2_ENCODING_UTF16BOM :
ID3v2_ENCODING_UTF8;
int64_t size_pos, cur_pos;
put_be32(s->pb, MKBETAG('I', 'D', '3', 0x04)); /* ID3v2.4 */
put_be32(s->pb, MKBETAG('I', 'D', '3', mp3->id3v2_version));
put_byte(s->pb, 0);
put_byte(s->pb, 0); /* flags */
@ -181,22 +203,24 @@ static int mp3_write_header(struct AVFormatContext *s)
put_be32(s->pb, 0);
ff_metadata_conv(&s->metadata, ff_id3v2_34_metadata_conv, NULL);
ff_metadata_conv(&s->metadata, ff_id3v2_4_metadata_conv, NULL);
if (mp3->id3v2_version == 4)
ff_metadata_conv(&s->metadata, ff_id3v2_4_metadata_conv, NULL);
while ((t = av_metadata_get(s->metadata, "", t, AV_METADATA_IGNORE_SUFFIX))) {
int ret;
if ((ret = id3v2_check_write_tag(s, t, ff_id3v2_tags)) > 0) {
if ((ret = id3v2_check_write_tag(s, t, ff_id3v2_tags, enc)) > 0) {
totlen += ret;
continue;
}
if ((ret = id3v2_check_write_tag(s, t, ff_id3v2_4_tags)) > 0) {
if ((ret = id3v2_check_write_tag(s, t, mp3->id3v2_version == 3 ?
ff_id3v2_3_tags : ff_id3v2_4_tags, enc)) > 0) {
totlen += ret;
continue;
}
/* unknown tag, write as TXXX frame */
if ((ret = id3v2_put_ttag(s, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'),
ID3v2_ENCODING_UTF8)) < 0)
if ((ret = id3v2_put_ttag(s, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0)
return ret;
totlen += ret;
}
@ -214,12 +238,13 @@ AVOutputFormat mp3_muxer = {
NULL_IF_CONFIG_SMALL("MPEG audio layer 3"),
"audio/x-mpeg",
"mp3",
0,
sizeof(MP3Context),
CODEC_ID_MP3,
CODEC_ID_NONE,
mp3_write_header,
mp3_write_packet,
mp3_write_trailer,
AVFMT_NOTIMESTAMPS,
.priv_class = &mp3_muxer_class,
};
#endif