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parse ID3v2 chapters 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2012-10-27 22:00:09 +00:00
parent 3f44809415
commit 07ed191b15
1 changed files with 31 additions and 0 deletions
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31
libavformat/id3v2.c
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@ -508,6 +508,36 @@ fail:
avio_seek(pb, end, SEEK_SET);
}
static void read_chapter(AVFormatContext *s, AVIOContext *pb, int taglen, char *tag, ID3v2ExtraMeta **extra_meta)
{
AVRational time_base = {1, 1000};
char title[1024];
uint32_t start, end;
taglen -= avio_get_str(pb, taglen, title, sizeof(title));
if (taglen < 16)
return;
start = avio_rb32(pb);
end = avio_rb32(pb);
taglen -= 27;
if (taglen > 0) {
char tag[4];
avio_skip(pb, 8);
avio_read(pb, tag, 4);
if (!memcmp(tag, "TIT2", 4)) {
taglen = FFMIN(taglen, avio_rb32(pb));
if (taglen < 0)
return;
avio_skip(pb, 3);
avio_get_str(pb, taglen, title, sizeof(title));
}
}
avpriv_new_chapter(s, s->nb_chapters + 1, time_base, start, end, title);
}
typedef struct ID3v2EMFunc {
const char *tag3;
const char *tag4;
@ -518,6 +548,7 @@ typedef struct ID3v2EMFunc {
static const ID3v2EMFunc id3v2_extra_meta_funcs[] = {
{ "GEO", "GEOB", read_geobtag, free_geobtag },
{ "PIC", "APIC", read_apic, free_apic },
{ "CHAP","CHAP", read_chapter, NULL },
{ NULL }
};