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mov: allocate the tag value dynamically

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This allows to load metadata entries longer than 1024 bytes.
Displaying them is still limited to 1024 characters, but applications
can load them fully now.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
This commit is contained in:
Thilo Borgmann 2014-11-29 17:51:14 +01:00 committed by Vittorio Giovara
parent e352b29371
commit 3cec81f4d4
1 changed files with 10 additions and 5 deletions
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15
libavformat/mov.c
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@ -253,10 +253,10 @@ static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
char tmp_key[5];
char str[1024], key2[32], language[4] = {0};
char *str, key2[32], language[4] = {0};
const char *key = NULL;
uint16_t langcode = 0;
uint32_t data_type = 0, str_size;
uint32_t data_type = 0, str_size, str_size_alloc;
int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
switch (atom.type) {
@ -336,13 +336,17 @@ static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
if (atom.size < 0)
return AVERROR_INVALIDDATA;
str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
// allocate twice as much as worst-case
str_size_alloc = str_size * 2;
str = av_malloc(str_size_alloc);
if (!str)
return AVERROR(ENOMEM);
if (parse)
parse(c, pb, str_size, key);
else {
if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
mov_read_mac_string(c, pb, str_size, str, sizeof(str));
mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
} else {
avio_read(pb, str, str_size);
str[str_size] = 0;
@ -356,8 +360,9 @@ static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
}
av_dlog(c->fc, "lang \"%3s\" ", language);
av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
key, str, (char*)&atom.type, str_size, atom.size);
key, str, (char*)&atom.type, str_size_alloc, atom.size);
av_freep(&str);
return 0;
}