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read itunes metadata, code based on Reimar's patch 

Originally committed as revision 15840 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2008-11-16 01:59:35 +00:00
parent 8e36385a63
commit 51c1520114
1 changed files with 50 additions and 2 deletions
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52
libavformat/mov.c
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@ -149,6 +149,7 @@ typedef struct MOVContext {
MOVFragment fragment; ///< current fragment in moof atom
MOVTrackExt *trex_data;
unsigned trex_count;
int itunes_metadata; ///< metadata are itunes style
} MOVContext;
@ -1366,26 +1367,66 @@ static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
return 0;
}
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
int ret;
c->itunes_metadata = 1;
ret = mov_read_default(c, pb, atom);
c->itunes_metadata = 0;
return ret;
}
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
url_fskip(pb, 4);
return mov_read_default(c, pb, atom);
}
static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
get_be32(pb); // type
get_be32(pb); // unknown
c->fc->track = get_be32(pb);
dprintf(c->fc, "%.4s %d\n", (char*)&atom.type, c->fc->track);
return 0;
}
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
char *str = NULL;
int size;
uint16_t str_size = get_be16(pb); /* string length */;
uint16_t str_size;
if (c->itunes_metadata) {
int data_size = get_be32(pb);
int tag = get_le32(pb);
if (tag == MKTAG('d','a','t','a')) {
get_be32(pb); // type
get_be32(pb); // unknown
str_size = data_size - 16;
} else return 0;
} else {
str_size = get_be16(pb); // string length
get_be16(pb); // language
}
switch (atom.type) {
case MKTAG(0xa9,'n','a','m'):
str = c->fc->title; size = sizeof(c->fc->title); break;
case MKTAG(0xa9,'A','R','T'):
case MKTAG(0xa9,'w','r','t'):
str = c->fc->author; size = sizeof(c->fc->author); break;
case MKTAG(0xa9,'c','p','y'):
str = c->fc->copyright; size = sizeof(c->fc->copyright); break;
case MKTAG(0xa9,'c','m','t'):
case MKTAG(0xa9,'i','n','f'):
str = c->fc->comment; size = sizeof(c->fc->comment); break;
case MKTAG(0xa9,'a','l','b'):
str = c->fc->album; size = sizeof(c->fc->album); break;
}
if (!str)
return 0;
get_be16(pb); /* skip language */
get_buffer(pb, str, FFMIN(size, str_size));
dprintf(c->fc, "%.4s %s\n", (char*)&atom.type, str);
return 0;
}
@ -1695,10 +1736,12 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('f','t','y','p'), mov_read_ftyp },
{ MKTAG('g','l','b','l'), mov_read_glbl },
{ MKTAG('h','d','l','r'), mov_read_hdlr },
{ MKTAG('i','l','s','t'), mov_read_ilst },
{ MKTAG('j','p','2','h'), mov_read_extradata },
{ MKTAG('m','d','a','t'), mov_read_mdat },
{ MKTAG('m','d','h','d'), mov_read_mdhd },
{ MKTAG('m','d','i','a'), mov_read_default },
{ MKTAG('m','e','t','a'), mov_read_meta },
{ MKTAG('m','i','n','f'), mov_read_default },
{ MKTAG('m','o','o','f'), mov_read_moof },
{ MKTAG('m','o','o','v'), mov_read_moov },
@ -1719,6 +1762,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('t','r','a','k'), mov_read_trak },
{ MKTAG('t','r','a','f'), mov_read_default },
{ MKTAG('t','r','e','x'), mov_read_trex },
{ MKTAG('t','r','k','n'), mov_read_trkn },
{ MKTAG('t','r','u','n'), mov_read_trun },
{ MKTAG('u','d','t','a'), mov_read_default },
{ MKTAG('w','a','v','e'), mov_read_wave },
@ -1729,6 +1773,10 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
{ MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
{ MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
{ MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
{ MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
{ 0, NULL }
};