2 * Windows Television (WTV) muxer
3 * Copyright (c) 2011 Zhentan Feng <spyfeng at gmail dot com>
4 * Copyright (c) 2011 Peter Ross <pross@xvid.org>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Windows Television (WTV) demuxer
25 * @author Zhentan Feng <spyfeng at gmail dot com>
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/avassert.h"
35 #define WTV_BIGSECTOR_SIZE (1 << WTV_BIGSECTOR_BITS)
36 #define INDEX_BASE 0x2
37 #define MAX_NB_INDEX 10
39 /* declare utf16le strings */
41 static const uint8_t timeline_table_0_header_events[] =
42 {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e'_'.'_'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'E'_'v'_'e'_'n'_'t'_'s', 0};
43 static const uint8_t table_0_header_legacy_attrib[] =
44 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
45 static const uint8_t table_0_redirector_legacy_attrib[] =
46 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'r'_'e'_'d'_'i'_'r'_'e'_'c'_'t'_'o'_'r'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
47 static const uint8_t table_0_header_time[] =
48 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'t'_'i'_'m'_'e', 0};
49 static const uint8_t legacy_attrib[] =
50 {'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
53 static const ff_asf_guid sub_wtv_guid =
54 {0x8C,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
57 WTV_TIMELINE_TABLE_0_HEADER_EVENTS = 0,
58 WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS,
60 WTV_TABLE_0_HEADER_LEGACY_ATTRIB,
61 WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB,
62 WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB,
63 WTV_TABLE_0_HEADER_TIME,
64 WTV_TABLE_0_ENTRIES_TIME,
78 const ff_asf_guid * guid;
88 int64_t timeline_start_pos;
89 WtvFile file[WTV_FILES];
90 int64_t serial; /** chunk serial number */
91 int64_t last_chunk_pos; /** last chunk position */
92 int64_t last_timestamp_pos; /** last timestamp chunk position */
93 int64_t first_index_pos; /** first index_chunk position */
95 WtvChunkEntry index[MAX_NB_INDEX];
99 WtvSyncEntry *st_pairs; /* (serial, timestamp) pairs */
101 WtvSyncEntry *sp_pairs; /* (serial, position) pairs */
109 static void add_serial_pair(WtvSyncEntry ** list, int * count, int64_t serial, int64_t value)
111 int new_count = *count + 1;
112 WtvSyncEntry *new_list = av_realloc(*list, new_count * sizeof(WtvSyncEntry));
115 new_list[*count] = (WtvSyncEntry){serial, value};
120 typedef int WTVHeaderWriteFunc(AVIOContext *pb);
123 const uint8_t *header;
125 WTVHeaderWriteFunc *write_header;
128 static int write_pad(AVIOContext *pb, int size)
130 for (; size > 0; size--)
135 static const ff_asf_guid *get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid)
138 for (i = 0; av_guid[i].id != AV_CODEC_ID_NONE; i++) {
139 if (id == av_guid[i].id)
140 return &(av_guid[i].guid);
146 * Write chunk header. If header chunk (0x80000000 set) then add to list of header chunks
148 static void write_chunk_header(AVFormatContext *s, const ff_asf_guid *guid, int length, int stream_id)
150 WtvContext *wctx = s->priv_data;
151 AVIOContext *pb = s->pb;
153 wctx->last_chunk_pos = avio_tell(pb) - wctx->timeline_start_pos;
154 ff_put_guid(pb, guid);
155 avio_wl32(pb, 32 + length);
156 avio_wl32(pb, stream_id);
157 avio_wl64(pb, wctx->serial);
159 if ((stream_id & 0x80000000) && guid != &ff_index_guid) {
160 WtvChunkEntry *t = wctx->index + wctx->nb_index;
161 av_assert0(wctx->nb_index < MAX_NB_INDEX);
162 t->pos = wctx->last_chunk_pos;
163 t->serial = wctx->serial;
165 t->stream_id = stream_id & 0x3FFFFFFF;
170 static void write_chunk_header2(AVFormatContext *s, const ff_asf_guid *guid, int stream_id)
172 WtvContext *wctx = s->priv_data;
173 AVIOContext *pb = s->pb;
175 int64_t last_chunk_pos = wctx->last_chunk_pos;
176 write_chunk_header(s, guid, 0, stream_id); // length updated later
177 avio_wl64(pb, last_chunk_pos);
180 static void finish_chunk_noindex(AVFormatContext *s)
182 WtvContext *wctx = s->priv_data;
183 AVIOContext *pb = s->pb;
185 // update the chunk_len field and pad.
186 int64_t chunk_len = avio_tell(pb) - (wctx->last_chunk_pos + wctx->timeline_start_pos);
187 avio_seek(pb, -(chunk_len - 16), SEEK_CUR);
188 avio_wl32(pb, chunk_len);
189 avio_seek(pb, chunk_len - (16 + 4), SEEK_CUR);
191 write_pad(pb, WTV_PAD8(chunk_len) - chunk_len);
195 static void write_index(AVFormatContext *s)
197 AVIOContext *pb = s->pb;
198 WtvContext *wctx = s->priv_data;
201 write_chunk_header2(s, &ff_index_guid, 0x80000000);
205 for (i = 0; i < wctx->nb_index; i++) {
206 WtvChunkEntry *t = wctx->index + i;
207 ff_put_guid(pb, t->guid);
208 avio_wl64(pb, t->pos);
209 avio_wl32(pb, t->stream_id);
210 avio_wl32(pb, 0); // checksum?
211 avio_wl64(pb, t->serial);
213 wctx->nb_index = 0; // reset index
214 finish_chunk_noindex(s);
216 if (!wctx->first_index_pos)
217 wctx->first_index_pos = wctx->last_chunk_pos;
220 static void finish_chunk(AVFormatContext *s)
222 WtvContext *wctx = s->priv_data;
223 finish_chunk_noindex(s);
224 if (wctx->nb_index == MAX_NB_INDEX)
228 static int write_stream_codec_info(AVFormatContext *s, AVStream *st)
230 WtvContext *wctx = s->priv_data;
231 const ff_asf_guid *g, *media_type, *format_type;
232 AVIOContext *pb = s->pb;
233 int64_t hdr_pos_start;
236 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
237 g = get_codec_guid(st->codec->codec_id, ff_video_guids);
238 media_type = &ff_mediatype_video;
239 format_type = &ff_format_mpeg2_video;
240 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
241 g = get_codec_guid(st->codec->codec_id, ff_codec_wav_guids);
242 media_type = &ff_mediatype_audio;
243 format_type = &ff_format_waveformatex;
245 av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codec->codec_type);
250 av_log(s, AV_LOG_ERROR, "can't get video codec_id (0x%x) guid.\n", st->codec->codec_id);
254 ff_put_guid(pb, media_type); // mediatype
255 ff_put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype
257 ff_put_guid(pb,&ff_format_cpfilters_processed); // format type
258 avio_wl32(pb, 0); // size
260 hdr_pos_start = avio_tell(pb);
261 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
262 if (wctx->first_video_flag) {
263 write_pad(pb, 216); //The size is sensitive.
264 wctx->first_video_flag = 0;
266 write_pad(pb, 72); // aspect ratio
267 ff_put_bmp_header(pb, st->codec, ff_codec_bmp_tags, 0);
270 ff_put_wav_header(pb, st->codec);
272 hdr_size = avio_tell(pb) - hdr_pos_start;
274 // seek back write hdr_size
275 avio_seek(pb, -(hdr_size + 4), SEEK_CUR);
276 avio_wl32(pb, hdr_size + 32);
277 avio_seek(pb, hdr_size, SEEK_CUR);
278 ff_put_guid(pb, g); // actual_subtype
279 ff_put_guid(pb, format_type); // actual_formattype
284 static int write_stream_codec(AVFormatContext *s, AVStream * st)
286 AVIOContext *pb = s->pb;
288 write_chunk_header2(s, &ff_stream1_guid, 0x80000000 | 0x01);
294 ret = write_stream_codec_info(s, st);
296 av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codec->codec_type);
304 static void write_sync(AVFormatContext *s)
306 AVIOContext *pb = s->pb;
307 WtvContext *wctx = s->priv_data;
308 int64_t last_chunk_pos = wctx->last_chunk_pos;
310 write_chunk_header(s, &ff_sync_guid, 0x18, 0);
311 avio_wl64(pb, wctx->first_index_pos);
312 avio_wl64(pb, wctx->last_timestamp_pos);
316 add_serial_pair(&wctx->sp_pairs, &wctx->nb_sp_pairs, wctx->serial, wctx->last_chunk_pos);
318 wctx->last_chunk_pos = last_chunk_pos;
321 static int write_stream_data(AVFormatContext *s, AVStream *st)
323 AVIOContext *pb = s->pb;
326 write_chunk_header2(s, &ff_SBE2_STREAM_DESC_EVENT, 0x80000000 | (st->index + INDEX_BASE));
327 avio_wl32(pb, 0x00000001);
328 avio_wl32(pb, st->index + INDEX_BASE); //stream_id
329 avio_wl32(pb, 0x00000001);
332 ret = write_stream_codec_info(s, st);
334 av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codec->codec_type);
339 avpriv_set_pts_info(st, 64, 1, 10000000);
344 static int write_header(AVFormatContext *s)
346 AVIOContext *pb = s->pb;
347 WtvContext *wctx = s->priv_data;
351 wctx->last_chunk_pos = -1;
352 wctx->last_timestamp_pos = -1;
354 ff_put_guid(pb, &ff_wtv_guid);
355 ff_put_guid(pb, &sub_wtv_guid);
359 avio_wl32(pb, 1 << WTV_SECTOR_BITS);
360 avio_wl32(pb, 1 << WTV_BIGSECTOR_BITS);
362 //write initial root fields
363 avio_wl32(pb, 0); // root_size, update later
365 avio_wl32(pb, 0); // root_sector, update it later.
368 avio_wl32(pb, 0); // file ends pointer, update it later.
370 pad = (1 << WTV_SECTOR_BITS) - avio_tell(pb);
373 wctx->timeline_start_pos = avio_tell(pb);
376 wctx->last_chunk_pos = -1;
377 wctx->first_video_flag = 1;
379 for (i = 0; i < s->nb_streams; i++) {
381 ret = write_stream_codec(s, st);
383 av_log(s, AV_LOG_ERROR, "write stream codec failed codec_type(0x%x)\n", st->codec->codec_type);
390 for (i = 0; i < s->nb_streams; i++) {
392 ret = write_stream_data(s, st);
394 av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codec->codec_type);
405 static void write_timestamp(AVFormatContext *s, AVPacket *pkt)
407 AVIOContext *pb = s->pb;
408 WtvContext *wctx = s->priv_data;
409 AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
411 write_chunk_header(s, &ff_timestamp_guid, 56, 0x40000000 | (INDEX_BASE + pkt->stream_index));
413 avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
414 avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
415 avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
417 avio_wl64(pb, enc->codec_type == AVMEDIA_TYPE_VIDEO && (pkt->flags & AV_PKT_FLAG_KEY) ? 1 : 0);
420 wctx->last_timestamp_pos = wctx->last_chunk_pos;
423 static int write_packet(AVFormatContext *s, AVPacket *pkt)
425 AVIOContext *pb = s->pb;
426 WtvContext *wctx = s->priv_data;
428 /* emit sync chunk and 'timeline.table.0.entries.Event' record every 50 frames */
429 if (wctx->serial - (wctx->nb_sp_pairs ? wctx->sp_pairs[wctx->nb_sp_pairs - 1].serial : 0) >= 50)
432 /* emit 'table.0.entries.time' record every 500ms */
433 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts - (wctx->nb_st_pairs ? wctx->st_pairs[wctx->nb_st_pairs - 1].value : 0) >= 5000000)
434 add_serial_pair(&wctx->st_pairs, &wctx->nb_st_pairs, wctx->serial, pkt->pts);
436 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts > wctx->last_pts) {
437 wctx->last_pts = pkt->pts;
438 wctx->last_serial = wctx->serial;
441 // write timestamp chunk
442 write_timestamp(s, pkt);
444 write_chunk_header(s, &ff_data_guid, pkt->size, INDEX_BASE + pkt->stream_index);
445 avio_write(pb, pkt->data, pkt->size);
446 write_pad(pb, WTV_PAD8(pkt->size) - pkt->size);
453 static int write_table0_header_events(AVIOContext *pb)
461 static int write_table0_header_legacy_attrib(AVIOContext *pb)
464 avio_wl32(pb, 0xFFFFFFFF);
466 avio_write(pb, legacy_attrib, sizeof(legacy_attrib));
467 pad = WTV_PAD8(sizeof(legacy_attrib)) - sizeof(legacy_attrib);
470 return 48 + WTV_PAD8(sizeof(legacy_attrib));
473 static int write_table0_header_time(AVIOContext *pb)
481 static const WTVRootEntryTable wtv_root_entry_table[] = {
482 { timeline_table_0_header_events, sizeof(timeline_table_0_header_events), write_table0_header_events},
483 { ff_timeline_table_0_entries_Events_le16, sizeof(ff_timeline_table_0_entries_Events_le16), NULL},
484 { ff_timeline_le16, sizeof(ff_timeline_le16), NULL},
485 { table_0_header_legacy_attrib, sizeof(table_0_header_legacy_attrib), write_table0_header_legacy_attrib},
486 { ff_table_0_entries_legacy_attrib_le16, sizeof(ff_table_0_entries_legacy_attrib_le16), NULL},
487 { table_0_redirector_legacy_attrib, sizeof(table_0_redirector_legacy_attrib), NULL},
488 { table_0_header_time, sizeof(table_0_header_time), write_table0_header_time},
489 { ff_table_0_entries_time_le16, sizeof(ff_table_0_entries_time_le16), NULL},
492 static int write_root_table(AVFormatContext *s, int64_t sector_pos)
494 AVIOContext *pb = s->pb;
495 WtvContext *wctx = s->priv_data;
499 const WTVRootEntryTable *h = wtv_root_entry_table;
500 for (i = 0; i < sizeof(wtv_root_entry_table)/sizeof(WTVRootEntryTable); i++, h++) {
501 WtvFile *w = &wctx->file[i];
502 int filename_padding = WTV_PAD8(h->header_size) - h->header_size;
503 WTVHeaderWriteFunc *write = h->write_header;
507 ff_put_guid(pb, &ff_dir_entry_guid);
508 len_pos = avio_tell(pb);
509 avio_wl16(pb, 40 + h->header_size + filename_padding + 8); // maybe updated later
511 avio_wl64(pb, write ? 0 : w->length);// maybe update later
512 avio_wl32(pb, (h->header_size + filename_padding) >> 1);
515 avio_write(pb, h->header, h->header_size);
516 write_pad(pb, filename_padding);
520 // update length field
521 avio_seek(pb, len_pos, SEEK_SET);
522 avio_wl64(pb, 40 + h->header_size + filename_padding + len);
523 avio_wl64(pb, len |(1ULL<<62) | (1ULL<<60));
524 avio_seek(pb, 8 + h->header_size + filename_padding + len, SEEK_CUR);
526 avio_wl32(pb, w->first_sector);
527 avio_wl32(pb, w->depth);
531 // caculate root table size
532 size = avio_tell(pb) - sector_pos;
533 pad = WTV_SECTOR_SIZE- size;
539 static void write_fat(AVIOContext *pb, int start_sector, int nb_sectors, int shift)
542 for (i = 0; i < nb_sectors; i++) {
543 avio_wl32(pb, start_sector + (i << shift));
545 // pad left sector pointer size
546 write_pad(pb, WTV_SECTOR_SIZE - ((nb_sectors << 2) % WTV_SECTOR_SIZE));
549 static int write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth)
551 int64_t start_sector = start_pos >> WTV_SECTOR_BITS;
552 int shift = sector_bits - WTV_SECTOR_BITS;
554 int64_t fat = avio_tell(s->pb);
555 write_fat(s->pb, start_sector, nb_sectors, shift);
558 int64_t start_sector1 = fat >> WTV_SECTOR_BITS;
559 int nb_sectors1 = ((nb_sectors << 2) + WTV_SECTOR_SIZE - 1) / WTV_SECTOR_SIZE;
560 int64_t fat1 = avio_tell(s->pb);
562 write_fat(s->pb, start_sector1, nb_sectors1, 0);
569 static void write_table_entries_events(AVFormatContext *s)
571 AVIOContext *pb = s->pb;
572 WtvContext *wctx = s->priv_data;
574 for (i = 0; i < wctx->nb_sp_pairs; i++) {
575 avio_wl64(pb, wctx->sp_pairs[i].serial);
576 avio_wl64(pb, wctx->sp_pairs[i].value);
580 static void write_table_entries_time(AVFormatContext *s)
582 AVIOContext *pb = s->pb;
583 WtvContext *wctx = s->priv_data;
585 for (i = 0; i < wctx->nb_st_pairs; i++) {
586 avio_wl64(pb, wctx->st_pairs[i].value);
587 avio_wl64(pb, wctx->st_pairs[i].serial);
589 avio_wl64(pb, wctx->last_pts);
590 avio_wl64(pb, wctx->last_serial);
593 static void write_tag(AVIOContext *pb, const char *key, const char *value)
595 ff_put_guid(pb, &ff_metadata_guid);
597 avio_wl32(pb, strlen(value)*2 + 2);
598 avio_put_str16le(pb, key);
599 avio_put_str16le(pb, value);
602 static void write_table_entries_attrib(AVFormatContext *s)
604 AVDictionaryEntry *tag = 0;
606 //FIXME: translate special tags (e.g. WM/Bitrate) to binary representation
607 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
608 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
609 write_tag(s->pb, tag->key, tag->value);
612 static void write_table_redirector_legacy_attrib(AVFormatContext *s)
614 AVIOContext *pb = s->pb;
615 AVDictionaryEntry *tag = 0;
618 //FIXME: translate special tags to binary representation
619 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
621 pos += 16 + 4 + 4 + strlen(tag->key)*2 + 2 + strlen(tag->value)*2 + 2;
626 * Pad the remainder of a file
627 * Write out fat table
628 * @return <0 on error
630 static int finish_file(AVFormatContext *s, enum WtvFileIndex index, int64_t start_pos)
632 WtvContext *wctx = s->priv_data;
633 AVIOContext *pb = s->pb;
634 WtvFile *w = &wctx->file[index];
635 int64_t end_pos = avio_tell(pb);
636 int sector_bits, nb_sectors, pad;
638 av_assert0(index < WTV_FILES);
640 w->length = (end_pos - start_pos);
642 // determine optimal fat table depth, sector_bits, nb_sectors
643 if (w->length <= WTV_SECTOR_SIZE) {
645 sector_bits = WTV_SECTOR_BITS;
646 } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) {
648 sector_bits = WTV_SECTOR_BITS;
649 } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) {
651 sector_bits = WTV_BIGSECTOR_BITS;
652 } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) {
654 sector_bits = WTV_SECTOR_BITS;
655 } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) {
657 sector_bits = WTV_BIGSECTOR_BITS;
659 av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (%"PRIi64" bytes)\n", w->length);
663 // determine the nb_sectors
664 nb_sectors = (int)(w->length >> sector_bits);
666 // pad sector of timeline
667 pad = (1 << sector_bits) - (w->length % (1 << sector_bits));
675 w->first_sector = write_fat_sector(s, start_pos, nb_sectors, sector_bits, w->depth);
677 w->first_sector = start_pos;
679 w->first_sector >>= WTV_SECTOR_BITS;
681 w->length |= 1ULL<<60;
682 if (sector_bits == WTV_SECTOR_BITS)
683 w->length |= 1ULL<<63;
688 static int write_trailer(AVFormatContext *s)
690 WtvContext *wctx = s->priv_data;
691 AVIOContext *pb = s->pb;
694 int64_t start_pos, file_end_pos;
696 if (finish_file(s, WTV_TIMELINE, wctx->timeline_start_pos) < 0)
699 start_pos = avio_tell(pb);
700 write_table_entries_events(s);
701 if (finish_file(s, WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS, start_pos) < 0)
704 start_pos = avio_tell(pb);
705 write_table_entries_attrib(s);
706 if (finish_file(s, WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB, start_pos) < 0)
709 start_pos = avio_tell(pb);
710 write_table_redirector_legacy_attrib(s);
711 if (finish_file(s, WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB, start_pos) < 0)
714 start_pos = avio_tell(pb);
715 write_table_entries_time(s);
716 if (finish_file(s, WTV_TABLE_0_ENTRIES_TIME, start_pos) < 0)
720 sector_pos = avio_tell(pb);
721 root_size = write_root_table(s, sector_pos);
723 file_end_pos = avio_tell(pb);
725 avio_seek(pb, 0x30, SEEK_SET);
726 avio_wl32(pb, root_size);
727 avio_seek(pb, 4, SEEK_CUR);
728 avio_wl32(pb, sector_pos >> WTV_SECTOR_BITS);
729 avio_seek(pb, 0x5c, SEEK_SET);
730 avio_wl32(pb, file_end_pos >> WTV_SECTOR_BITS);
734 av_free(wctx->sp_pairs);
735 av_free(wctx->st_pairs);
739 AVOutputFormat ff_wtv_muxer = {
741 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
743 .priv_data_size = sizeof(WtvContext),
744 .audio_codec = AV_CODEC_ID_AC3,
745 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
746 .write_header = write_header,
747 .write_packet = write_packet,
748 .write_trailer = write_trailer,
749 .codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags,
750 ff_codec_wav_tags, 0 },