static int write_table0_header_legacy_attrib(AVIOContext *pb)
{
int pad = 0;
avio_wl32(pb, 0xFFFFFFFF);
write_pad(pb, 12);
avio_write(pb, legacy_attrib, sizeof(legacy_attrib));
pad = WTV_PAD8(sizeof(legacy_attrib)) - sizeof(legacy_attrib);
write_pad(pb, pad);
write_pad(pb, 32);
return 48 + WTV_PAD8(sizeof(legacy_attrib));
}
static int write_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIOContext *pb = s->pb;
WtvContext *wctx = s->priv_data;
/* emit sync chunk and 'timeline.table.0.entries.Event' record every 50 frames */
if (wctx->serial - (wctx->nb_sp_pairs ? wctx->sp_pairs[wctx->nb_sp_pairs - 1].serial : 0) >= 50)
write_sync(s);
/* emit 'table.0.entries.time' record every 500ms */
if (pkt->pts != AV_NOPTS_VALUE && pkt->pts - (wctx->nb_st_pairs ? wctx->st_pairs[wctx->nb_st_pairs - 1].value : 0) >= 5000000)
add_serial_pair(&wctx->st_pairs, &wctx->nb_st_pairs, wctx->serial, pkt->pts);
if (pkt->pts != AV_NOPTS_VALUE && pkt->pts > wctx->last_pts) {
wctx->last_pts = pkt->pts;
wctx->last_serial = wctx->serial;
}
// write timestamp chunk
write_timestamp(s, pkt);
write_chunk_header(s, &ff_data_guid, pkt->size, INDEX_BASE + pkt->stream_index);
avio_write(pb, pkt->data, pkt->size);
write_pad(pb, WTV_PAD8(pkt->size) - pkt->size);
wctx->serial++;
avio_flush(pb);
return 0;
}
static void finish_chunk_noindex(AVFormatContext *s)
{
WtvContext *wctx = s->priv_data;
AVIOContext *pb = s->pb;
// update the chunk_len field and pad.
int64_t chunk_len = avio_tell(pb) - (wctx->last_chunk_pos + wctx->timeline_start_pos);
avio_seek(pb, -(chunk_len - 16), SEEK_CUR);
avio_wl32(pb, chunk_len);
avio_seek(pb, chunk_len - (16 + 4), SEEK_CUR);
write_pad(pb, WTV_PAD8(chunk_len) - chunk_len);
wctx->serial++;
}
static int write_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIOContext *pb = s->pb;
WtvContext *wctx = s->priv_data;
// write timestamp chunk
write_timestamp(s, pkt);
write_chunk_header(s, &ff_data_guid, pkt->size, INDEX_BASE + pkt->stream_index);
avio_write(pb, pkt->data, pkt->size);
write_pad(pb, WTV_PAD8(pkt->size) - pkt->size);
wctx->serial++;
avio_flush(pb);
return 0;
}
static int write_root_table(AVFormatContext *s, int64_t sector_pos)
{
AVIOContext *pb = s->pb;
WtvContext *wctx = s->priv_data;
int size, pad;
int i;
const WTVRootEntryTable *h = wtv_root_entry_table;
for (i = 0; i < sizeof(wtv_root_entry_table)/sizeof(WTVRootEntryTable); i++, h++) {
WtvFile *w = &wctx->file[i];
int filename_padding = WTV_PAD8(h->header_size) - h->header_size;
WTVHeaderWriteFunc *write = h->write_header;
int len = 0;
int64_t len_pos;
ff_put_guid(pb, &ff_dir_entry_guid);
len_pos = avio_tell(pb);
avio_wl16(pb, 40 + h->header_size + filename_padding + 8); // maybe updated later
write_pad(pb, 6);
avio_wl64(pb, write ? 0 : w->length);// maybe update later
avio_wl32(pb, (h->header_size + filename_padding) >> 1);
write_pad(pb, 4);
avio_write(pb, h->header, h->header_size);
write_pad(pb, filename_padding);
if (write) {
len = write(pb);
// update length field
avio_seek(pb, len_pos, SEEK_SET);
avio_wl64(pb, 40 + h->header_size + filename_padding + len);
avio_wl64(pb, len |(1ULL<<62) | (1ULL<<60));
avio_seek(pb, 8 + h->header_size + filename_padding + len, SEEK_CUR);
} else {
avio_wl32(pb, w->first_sector);
avio_wl32(pb, w->depth);
}
}
// caculate root table size
size = avio_tell(pb) - sector_pos;
pad = WTV_SECTOR_SIZE- size;
write_pad(pb, pad);
return size;
}
