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movenc: Write 'loci' geotag metadata for 3gp and mp4 

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2016-05-18 13:54:11 +03:00
parent f12a705ee5
commit b84f3a4003
1 changed files with 53 additions and 0 deletions
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53
libavformat/movenc.c
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@ -2040,6 +2040,57 @@ static int mov_write_string_metadata(AVFormatContext *s, AVIOContext *pb,
return mov_write_string_tag(pb, name, t->value, lang, long_style);
}
/* 3GPP TS 26.244 */
static int mov_write_loci_tag(AVFormatContext *s, AVIOContext *pb)
{
int lang;
int64_t pos = avio_tell(pb);
double latitude, longitude, altitude;
int32_t latitude_fix, longitude_fix, altitude_fix;
AVDictionaryEntry *t = get_metadata_lang(s, "location", &lang);
const char *ptr, *place = "";
char *end;
const char *astronomical_body = "earth";
if (!t)
return 0;
ptr = t->value;
longitude = strtod(ptr, &end);
if (end == ptr) {
av_log(s, AV_LOG_WARNING, "malformed location metadata\n");
return 0;
}
ptr = end;
latitude = strtod(ptr, &end);
if (end == ptr) {
av_log(s, AV_LOG_WARNING, "malformed location metadata\n");
return 0;
}
ptr = end;
altitude = strtod(ptr, &end);
/* If no altitude was present, the default 0 should be fine */
if (*end == '/')
place = end + 1;
latitude_fix = (int32_t) ((1 << 16) * latitude);
longitude_fix = (int32_t) ((1 << 16) * longitude);
altitude_fix = (int32_t) ((1 << 16) * altitude);
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "loci"); /* type */
avio_wb32(pb, 0); /* version + flags */
avio_wb16(pb, lang);
avio_write(pb, place, strlen(place) + 1);
avio_w8(pb, 0); /* role of place (0 == shooting location, 1 == real location, 2 == fictional location) */
avio_wb32(pb, latitude_fix);
avio_wb32(pb, longitude_fix);
avio_wb32(pb, altitude_fix);
avio_write(pb, astronomical_body, strlen(astronomical_body) + 1);
avio_w8(pb, 0); /* additional notes, null terminated string */
return update_size(pb, pos);
}
/* iTunes track number */
static int mov_write_trkn_tag(AVIOContext *pb, MOVMuxContext *mov,
AVFormatContext *s)
@ -2194,6 +2245,7 @@ static int mov_write_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
mov_write_3gp_udta_tag(pb_buf, s, "albm", "album");
mov_write_3gp_udta_tag(pb_buf, s, "cprt", "copyright");
mov_write_3gp_udta_tag(pb_buf, s, "yrrc", "date");
mov_write_loci_tag(s, pb_buf);
} else if (mov->mode == MODE_MOV) { // the title field breaks gtkpod with mp4 and my suspicion is that stuff is not valid in mp4
mov_write_string_metadata(s, pb_buf, "\251ART", "artist", 0);
mov_write_string_metadata(s, pb_buf, "\251nam", "title", 0);
@ -2211,6 +2263,7 @@ static int mov_write_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
} else {
/* iTunes meta data */
mov_write_meta_tag(pb_buf, mov, s);
mov_write_loci_tag(s, pb_buf);
}
if (s->nb_chapters && !(mov->flags & FF_MOV_FLAG_DISABLE_CHPL))