static int gxf_write_umf_material_description(AVFormatContext *s)
{
GXFContext *gxf = s->priv_data;
AVIOContext *pb = s->pb;
int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
int64_t timestamp = 0;
AVDictionaryEntry *t;
uint64_t nb_fields;
uint32_t timecode_in; // timecode at mark in
uint32_t timecode_out; // timecode at mark out
#if FF_API_TIMESTAMP
if (s->timestamp)
timestamp = s->timestamp;
else
#endif
if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
timestamp = ff_iso8601_to_unix_time(t->value);
timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
gxf->tc.hh, gxf->tc.mm,
gxf->tc.ss, gxf->tc.ff);
nb_fields = gxf->nb_fields +
gxf->tc.hh * (timecode_base * 3600) +
gxf->tc.mm * (timecode_base * 60) +
gxf->tc.ss * timecode_base +
gxf->tc.ff;
timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
nb_fields / (timecode_base * 3600) % 24,
nb_fields / (timecode_base * 60) % 60,
nb_fields / timecode_base % 60,
nb_fields % timecode_base);
avio_wl32(pb, gxf->flags);
avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
avio_wl32(pb, 0); /* mark in */
avio_wl32(pb, gxf->nb_fields); /* mark out */
avio_wl32(pb, timecode_in); /* timecode mark in */
avio_wl32(pb, timecode_out); /* timecode mark out */
avio_wl64(pb, timestamp); /* modification time */
avio_wl64(pb, timestamp); /* creation time */
avio_wl16(pb, 0); /* reserved */
avio_wl16(pb, 0); /* reserved */
avio_wl16(pb, gxf->audio_tracks);
avio_wl16(pb, 1); /* timecode track count */
avio_wl16(pb, 0); /* reserved */
avio_wl16(pb, gxf->mpeg_tracks);
return 48;
}
static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
{
uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
gxf->tc.hh, gxf->tc.mm,
gxf->tc.ss, gxf->tc.ff);
avio_wl32(pb, timecode);
/* reserved */
avio_wl32(pb, 0);
return 8;
}
