static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
{
GXFContext *gxf = s->priv_data;
AVIOContext *pb = s->pb;
int64_t pos = avio_tell(pb);
if (!rewrite) {
if (!(gxf->map_offsets_nb % 30)) {
gxf->map_offsets = av_realloc_f(gxf->map_offsets,
sizeof(*gxf->map_offsets),
gxf->map_offsets_nb+30);
if (!gxf->map_offsets) {
av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
return -1;
}
}
gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
}
gxf_write_packet_header(pb, PKT_MAP);
/* preamble */
avio_w8(pb, 0xE0); /* version */
avio_w8(pb, 0xFF); /* reserved */
gxf_write_material_data_section(s);
gxf_write_track_description_section(s);
return updatePacketSize(pb, pos);
}
static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx)
{
int64_t pos = url_ftell(pb);
gxf_write_packet_header(pb, PKT_MAP);
/* preamble */
put_byte(pb, 0xE0); /* version */
put_byte(pb, 0xFF); /* reserved */
gxf_write_material_data_section(pb, ctx);
gxf_write_track_description_section(pb, ctx);
return updatePacketSize(pb, pos);
}
