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Code Issues Releases Activity

avformat/movenc: Avoid calling strlen multiple times

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Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-08-23 09:11:29 +02:00
parent 64020dfe08
commit 831718bbab
1 changed files with 13 additions and 9 deletions
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22
libavformat/movenc.c
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@ -2799,6 +2799,7 @@ static int mov_write_hdlr_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *tra
MOVMuxContext *mov = s->priv_data;
const char *hdlr, *descr = NULL, *hdlr_type = NULL;
int64_t pos = avio_tell(pb);
size_t descr_len;
hdlr = "dhlr";
hdlr_type = "url ";
@ -2864,9 +2865,10 @@ static int mov_write_hdlr_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *tra
avio_wb32(pb, 0); /* reserved */
avio_wb32(pb, 0); /* reserved */
avio_wb32(pb, 0); /* reserved */
descr_len = strlen(descr);
if (!track || track->mode == MODE_MOV)
avio_w8(pb, strlen(descr)); /* pascal string */
avio_write(pb, descr, strlen(descr)); /* handler description */
avio_w8(pb, descr_len); /* pascal string */
avio_write(pb, descr, descr_len); /* handler description */
if (track && track->mode != MODE_MOV)
avio_w8(pb, 0); /* c string */
return update_size(pb, pos);
@ -3539,21 +3541,22 @@ static int mov_write_itunes_hdlr_tag(AVIOContext *pb, MOVMuxContext *mov,
/* helper function to write a data tag with the specified string as data */
static int mov_write_string_data_tag(AVIOContext *pb, const char *data, int lang, int long_style)
{
size_t data_len = strlen(data);
if (long_style) {
int size = 16 + strlen(data);
int size = 16 + data_len;
avio_wb32(pb, size); /* size */
ffio_wfourcc(pb, "data");
avio_wb32(pb, 1);
avio_wb32(pb, 0);
avio_write(pb, data, strlen(data));
avio_write(pb, data, data_len);
return size;
} else {
avio_wb16(pb, data_len); /* string length */
if (!lang)
lang = ff_mov_iso639_to_lang("und", 1);
avio_wb16(pb, strlen(data)); /* string length */
avio_wb16(pb, lang);
avio_write(pb, data, strlen(data));
return strlen(data) + 4;
avio_write(pb, data, data_len);
return data_len + 4;
}
}
@ -3829,9 +3832,10 @@ static int mov_write_mdta_keys_tag(AVIOContext *pb, MOVMuxContext *mov,
avio_wb32(pb, 0); /* entry count */
while (t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)) {
avio_wb32(pb, strlen(t->key) + 8);
size_t key_len = strlen(t->key);
avio_wb32(pb, key_len + 8);
ffio_wfourcc(pb, "mdta");
avio_write(pb, t->key, strlen(t->key));
avio_write(pb, t->key, key_len);
count += 1;
}
curpos = avio_tell(pb);