FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/wtvenc.c
Date: 2025-11-02 12:19:36
Exec Total Coverage
Lines: 392 459 85.4%
Functions: 29 31 93.5%
Branches: 87 142 61.3%
Line Branch Exec Source
1 /*
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.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 /**
23 * @file
24 * Windows Television (WTV) demuxer
25 * @author Zhentan Feng <spyfeng at gmail dot com>
26 */
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/mem.h"
30 #include "avformat.h"
31 #include "avio_internal.h"
32 #include "internal.h"
33 #include "mpegts.h"
34 #include "mux.h"
35 #include "wtv.h"
36
37 #define WTV_BIGSECTOR_SIZE (1 << WTV_BIGSECTOR_BITS)
38 #define INDEX_BASE 0x2
39 #define MAX_NB_INDEX 10
40
41 /* declare utf16le strings */
42 #define _ , 0,
43 static const uint8_t timeline_table_0_header_events[] =
44 {'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};
45 static const uint8_t table_0_header_legacy_attrib[] =
46 {'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};
47 static const uint8_t table_0_redirector_legacy_attrib[] =
48 {'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};
49 static const uint8_t table_0_header_time[] =
50 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'t'_'i'_'m'_'e', 0};
51 static const uint8_t legacy_attrib[] =
52 {'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
53 #undef _
54
55 static const ff_asf_guid sub_wtv_guid =
56 {0x8C,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
57
58 enum WtvFileIndex {
59 WTV_TIMELINE_TABLE_0_HEADER_EVENTS = 0,
60 WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS,
61 WTV_TIMELINE,
62 WTV_TABLE_0_HEADER_LEGACY_ATTRIB,
63 WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB,
64 WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB,
65 WTV_TABLE_0_HEADER_TIME,
66 WTV_TABLE_0_ENTRIES_TIME,
67 WTV_FILES
68 };
69
70 typedef struct {
71 int64_t length;
72 const void *header;
73 int depth;
74 int first_sector;
75 } WtvFile;
76
77 typedef struct {
78 int64_t pos;
79 int64_t serial;
80 const ff_asf_guid * guid;
81 int stream_id;
82 } WtvChunkEntry;
83
84 typedef struct {
85 int64_t serial;
86 int64_t value;
87 } WtvSyncEntry;
88
89 typedef struct {
90 int64_t timeline_start_pos;
91 WtvFile file[WTV_FILES];
92 int64_t serial; /**< chunk serial number */
93 int64_t last_chunk_pos; /**< last chunk position */
94 int64_t last_timestamp_pos; /**< last timestamp chunk position */
95 int64_t first_index_pos; /**< first index_chunk position */
96
97 WtvChunkEntry index[MAX_NB_INDEX];
98 int nb_index;
99 int first_video_flag;
100
101 WtvSyncEntry *st_pairs; /* (serial, timestamp) pairs */
102 int nb_st_pairs;
103 WtvSyncEntry *sp_pairs; /* (serial, position) pairs */
104 int nb_sp_pairs;
105
106 int64_t last_pts;
107 int64_t last_serial;
108
109 AVPacket thumbnail;
110 } WtvContext;
111
112
113 4 static void add_serial_pair(WtvSyncEntry ** list, int * count, int64_t serial, int64_t value)
114 {
115 4 int new_count = *count + 1;
116 4 WtvSyncEntry *new_list = av_realloc_array(*list, new_count, sizeof(WtvSyncEntry));
117
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 4 if (!new_list)
118 ✗ return;
119 4 new_list[*count] = (WtvSyncEntry){serial, value};
120 4 *list = new_list;
121 4 *count = new_count;
122 }
123
124 typedef int WTVHeaderWriteFunc(AVIOContext *pb);
125
126 typedef struct {
127 const uint8_t *header;
128 int header_size;
129 WTVHeaderWriteFunc *write_header;
130 } WTVRootEntryTable;
131
132 #define write_pad(pb, size) ffio_fill(pb, 0, size)
133
134 /**
135 * Write chunk header. If header chunk (0x80000000 set) then add to list of header chunks
136 */
137 135 static void write_chunk_header(AVFormatContext *s, const ff_asf_guid *guid, int length, int stream_id)
138 {
139 135 WtvContext *wctx = s->priv_data;
140 135 AVIOContext *pb = s->pb;
141
142 135 wctx->last_chunk_pos = avio_tell(pb) - wctx->timeline_start_pos;
143 135 ff_put_guid(pb, guid);
144 135 avio_wl32(pb, 32 + length);
145 135 avio_wl32(pb, stream_id);
146 135 avio_wl64(pb, wctx->serial);
147
148
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 135 if ((stream_id & 0x80000000) && guid != &ff_index_guid) {
149 4 WtvChunkEntry *t = wctx->index + wctx->nb_index;
150
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 4 av_assert0(wctx->nb_index < MAX_NB_INDEX);
151 4 t->pos = wctx->last_chunk_pos;
152 4 t->serial = wctx->serial;
153 4 t->guid = guid;
154 4 t->stream_id = stream_id & 0x3FFFFFFF;
155 4 wctx->nb_index++;
156 }
157 135 }
158
159 5 static void write_chunk_header2(AVFormatContext *s, const ff_asf_guid *guid, int stream_id)
160 {
161 5 WtvContext *wctx = s->priv_data;
162 5 AVIOContext *pb = s->pb;
163
164 5 int64_t last_chunk_pos = wctx->last_chunk_pos;
165 5 write_chunk_header(s, guid, 0, stream_id); // length updated later
166 5 avio_wl64(pb, last_chunk_pos);
167 5 }
168
169 7 static void finish_chunk_noindex(AVFormatContext *s)
170 {
171 7 WtvContext *wctx = s->priv_data;
172 7 AVIOContext *pb = s->pb;
173
174 // update the chunk_len field and pad.
175 7 int64_t chunk_len = avio_tell(pb) - (wctx->last_chunk_pos + wctx->timeline_start_pos);
176 7 avio_seek(pb, -(chunk_len - 16), SEEK_CUR);
177 7 avio_wl32(pb, chunk_len);
178 7 avio_seek(pb, chunk_len - (16 + 4), SEEK_CUR);
179
180 7 write_pad(pb, WTV_PAD8(chunk_len) - chunk_len);
181 7 wctx->serial++;
182 7 }
183
184 1 static void write_index(AVFormatContext *s)
185 {
186 1 AVIOContext *pb = s->pb;
187 1 WtvContext *wctx = s->priv_data;
188 int i;
189
190 1 write_chunk_header2(s, &ff_index_guid, 0x80000000);
191 1 avio_wl32(pb, 0);
192 1 avio_wl32(pb, 0);
193
194
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 5 for (i = 0; i < wctx->nb_index; i++) {
195 4 WtvChunkEntry *t = wctx->index + i;
196 4 ff_put_guid(pb, t->guid);
197 4 avio_wl64(pb, t->pos);
198 4 avio_wl32(pb, t->stream_id);
199 4 avio_wl32(pb, 0); // checksum?
200 4 avio_wl64(pb, t->serial);
201 }
202 1 wctx->nb_index = 0; // reset index
203 1 finish_chunk_noindex(s);
204
205
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 1 if (!wctx->first_index_pos)
206 1 wctx->first_index_pos = wctx->last_chunk_pos;
207 1 }
208
209 6 static void finish_chunk(AVFormatContext *s)
210 {
211 6 WtvContext *wctx = s->priv_data;
212 6 finish_chunk_noindex(s);
213
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 6 if (wctx->nb_index == MAX_NB_INDEX)
214 ✗ write_index(s);
215 6 }
216
217 2 static void put_videoinfoheader2(AVIOContext *pb, AVStream *st)
218 {
219 2 AVRational dar = av_mul_q(st->sample_aspect_ratio, (AVRational){st->codecpar->width, st->codecpar->height});
220 unsigned int num, den;
221 2 av_reduce(&num, &den, dar.num, dar.den, 0xFFFFFFFF);
222
223 /* VIDEOINFOHEADER2 */
224 2 avio_wl32(pb, 0);
225 2 avio_wl32(pb, 0);
226 2 avio_wl32(pb, st->codecpar->width);
227 2 avio_wl32(pb, st->codecpar->height);
228
229 2 avio_wl32(pb, 0);
230 2 avio_wl32(pb, 0);
231 2 avio_wl32(pb, 0);
232 2 avio_wl32(pb, 0);
233
234 2 avio_wl32(pb, st->codecpar->bit_rate);
235 2 avio_wl32(pb, 0);
236
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 2 avio_wl64(pb, st->avg_frame_rate.num && st->avg_frame_rate.den ? INT64_C(10000000) / av_q2d(st->avg_frame_rate) : 0);
237 2 avio_wl32(pb, 0);
238 2 avio_wl32(pb, 0);
239
240 2 avio_wl32(pb, num);
241 2 avio_wl32(pb, den);
242 2 avio_wl32(pb, 0);
243 2 avio_wl32(pb, 0);
244
245 2 ff_put_bmp_header(pb, st->codecpar, 0, 1, 0);
246
247
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 2 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
248
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 2 int padding = (st->codecpar->extradata_size & 3) ? 4 - (st->codecpar->extradata_size & 3) : 0;
249 /* MPEG2VIDEOINFO */
250 2 avio_wl32(pb, 0);
251 2 avio_wl32(pb, st->codecpar->extradata_size + padding);
252 2 avio_wl32(pb, -1);
253 2 avio_wl32(pb, -1);
254 2 avio_wl32(pb, 0);
255 2 avio_write(pb, st->codecpar->extradata, st->codecpar->extradata_size);
256 2 ffio_fill(pb, 0, padding);
257 }
258 2 }
259
260 4 static int write_stream_codec_info(AVFormatContext *s, AVStream *st)
261 {
262 const ff_asf_guid *g, *media_type, *format_type;
263 const AVCodecTag *tags;
264 4 AVIOContext *pb = s->pb;
265 int64_t hdr_pos_start;
266 4 int hdr_size = 0;
267
268
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 4 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
269 2 g = ff_get_codec_guid(st->codecpar->codec_id, ff_video_guids);
270 2 media_type = &ff_mediatype_video;
271
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 2 format_type = st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO ? &ff_format_mpeg2_video : &ff_format_videoinfo2;
272 2 tags = ff_codec_bmp_tags;
273
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 2 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
274 2 g = ff_get_codec_guid(st->codecpar->codec_id, ff_codec_wav_guids);
275 2 media_type = &ff_mediatype_audio;
276 2 format_type = &ff_format_waveformatex;
277 2 tags = ff_codec_wav_tags;
278 } else {
279 ✗ av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codecpar->codec_type);
280 ✗ return -1;
281 }
282
283 4 ff_put_guid(pb, media_type); // mediatype
284 4 ff_put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype
285 4 write_pad(pb, 12);
286 4 ff_put_guid(pb,&ff_format_cpfilters_processed); // format type
287 4 avio_wl32(pb, 0); // size
288
289 4 hdr_pos_start = avio_tell(pb);
290
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 4 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
291 2 put_videoinfoheader2(pb, st);
292 } else {
293
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 2 if (ff_put_wav_header(s, pb, st->codecpar, 0) < 0)
294 ✗ format_type = &ff_format_none;
295 }
296 4 hdr_size = avio_tell(pb) - hdr_pos_start;
297
298 // seek back write hdr_size
299 4 avio_seek(pb, -(hdr_size + 4), SEEK_CUR);
300 4 avio_wl32(pb, hdr_size + 32);
301 4 avio_seek(pb, hdr_size, SEEK_CUR);
302
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 4 if (g) {
303 4 ff_put_guid(pb, g); // actual_subtype
304 } else {
305 ✗ int tag = ff_codec_get_tag(tags, st->codecpar->codec_id);
306 ✗ if (!tag) {
307 ✗ av_log(s, AV_LOG_ERROR, "unsupported codec_id (0x%x)\n", st->codecpar->codec_id);
308 ✗ return -1;
309 }
310 ✗ avio_wl32(pb, tag);
311 ✗ avio_write(pb, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12);
312 }
313 4 ff_put_guid(pb, format_type); // actual_formattype
314
315 4 return 0;
316 }
317
318 2 static int write_stream_codec(AVFormatContext *s, AVStream * st)
319 {
320 2 AVIOContext *pb = s->pb;
321 int ret;
322 2 write_chunk_header2(s, &ff_stream1_guid, 0x80000000 | 0x01);
323
324 2 avio_wl32(pb, 0x01);
325 2 write_pad(pb, 4);
326 2 write_pad(pb, 4);
327
328 2 ret = write_stream_codec_info(s, st);
329
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 2 if (ret < 0) {
330 ✗ av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type);
331 ✗ return -1;
332 }
333
334 2 finish_chunk(s);
335 2 return 0;
336 }
337
338 2 static void write_sync(AVFormatContext *s)
339 {
340 2 AVIOContext *pb = s->pb;
341 2 WtvContext *wctx = s->priv_data;
342 2 int64_t last_chunk_pos = wctx->last_chunk_pos;
343
344 2 write_chunk_header(s, &ff_sync_guid, 0x18, 0);
345 2 avio_wl64(pb, wctx->first_index_pos);
346 2 avio_wl64(pb, wctx->last_timestamp_pos);
347 2 avio_wl64(pb, 0);
348
349 2 finish_chunk(s);
350 2 add_serial_pair(&wctx->sp_pairs, &wctx->nb_sp_pairs, wctx->serial, wctx->last_chunk_pos);
351
352 2 wctx->last_chunk_pos = last_chunk_pos;
353 2 }
354
355 2 static int write_stream_data(AVFormatContext *s, AVStream *st)
356 {
357 2 AVIOContext *pb = s->pb;
358 int ret;
359
360 2 write_chunk_header2(s, &ff_SBE2_STREAM_DESC_EVENT, 0x80000000 | (st->index + INDEX_BASE));
361 2 avio_wl32(pb, 0x00000001);
362 2 avio_wl32(pb, st->index + INDEX_BASE); //stream_id
363 2 avio_wl32(pb, 0x00000001);
364 2 write_pad(pb, 8);
365
366 2 ret = write_stream_codec_info(s, st);
367
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 2 if (ret < 0) {
368 ✗ av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type);
369 ✗ return -1;
370 }
371 2 finish_chunk(s);
372
373 2 avpriv_set_pts_info(st, 64, 1, 10000000);
374
375 2 return 0;
376 }
377
378 1 static int write_header(AVFormatContext *s)
379 {
380 1 AVIOContext *pb = s->pb;
381 1 WtvContext *wctx = s->priv_data;
382 int i, pad, ret;
383 AVStream *st;
384
385 1 wctx->last_chunk_pos = -1;
386 1 wctx->last_timestamp_pos = -1;
387
388 1 ff_put_guid(pb, &ff_wtv_guid);
389 1 ff_put_guid(pb, &sub_wtv_guid);
390
391 1 avio_wl32(pb, 0x01);
392 1 avio_wl32(pb, 0x02);
393 1 avio_wl32(pb, 1 << WTV_SECTOR_BITS);
394 1 avio_wl32(pb, 1 << WTV_BIGSECTOR_BITS);
395
396 //write initial root fields
397 1 avio_wl32(pb, 0); // root_size, update later
398 1 write_pad(pb, 4);
399 1 avio_wl32(pb, 0); // root_sector, update it later.
400
401 1 write_pad(pb, 32);
402 1 avio_wl32(pb, 0); // file ends pointer, update it later.
403
404 1 pad = (1 << WTV_SECTOR_BITS) - avio_tell(pb);
405 1 write_pad(pb, pad);
406
407 1 wctx->timeline_start_pos = avio_tell(pb);
408
409 1 wctx->serial = 1;
410 1 wctx->last_chunk_pos = -1;
411 1 wctx->first_video_flag = 1;
412
413
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 3 for (i = 0; i < s->nb_streams; i++) {
414 2 st = s->streams[i];
415
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 2 if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG)
416 ✗ continue;
417 2 ret = write_stream_codec(s, st);
418
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 2 if (ret < 0) {
419 ✗ av_log(s, AV_LOG_ERROR, "write stream codec failed codec_type(0x%x)\n", st->codecpar->codec_type);
420 ✗ return -1;
421 }
422
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 2 if (!i)
423 1 write_sync(s);
424 }
425
426
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 3 for (i = 0; i < s->nb_streams; i++) {
427 2 st = s->streams[i];
428
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 2 if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG)
429 ✗ continue;
430 2 ret = write_stream_data(s, st);
431
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 2 if (ret < 0) {
432 ✗ av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codecpar->codec_type);
433 ✗ return -1;
434 }
435 }
436
437
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 1 if (wctx->nb_index)
438 1 write_index(s);
439
440 1 return 0;
441 }
442
443 64 static void write_timestamp(AVFormatContext *s, AVPacket *pkt)
444 {
445 64 AVIOContext *pb = s->pb;
446 64 WtvContext *wctx = s->priv_data;
447 64 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
448
449 64 write_chunk_header(s, &ff_timestamp_guid, 56, 0x40000000 | (INDEX_BASE + pkt->stream_index));
450 64 write_pad(pb, 8);
451
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 64 avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
452
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 64 avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
453
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 64 avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? 0 : pkt->pts);
454 64 avio_wl64(pb, 0);
455
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 64 avio_wl64(pb, par->codec_type == AVMEDIA_TYPE_VIDEO && (pkt->flags & AV_PKT_FLAG_KEY) ? 1 : 0);
456 64 avio_wl64(pb, 0);
457
458 64 wctx->last_timestamp_pos = wctx->last_chunk_pos;
459 64 }
460
461 64 static int write_packet(AVFormatContext *s, AVPacket *pkt)
462 {
463 64 AVIOContext *pb = s->pb;
464 64 WtvContext *wctx = s->priv_data;
465 64 AVStream *st = s->streams[pkt->stream_index];
466
467
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 64 if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && !wctx->thumbnail.size) {
468 ✗ av_packet_ref(&wctx->thumbnail, pkt);
469 ✗ return 0;
470
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 64 } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
471 ✗ int ret = ff_check_h264_startcode(s, st, pkt);
472 ✗ if (ret < 0)
473 ✗ return ret;
474 }
475
476 /* emit sync chunk and 'timeline.table.0.entries.Event' record every 50 frames */
477
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 64 if (wctx->serial - (wctx->nb_sp_pairs ? wctx->sp_pairs[wctx->nb_sp_pairs - 1].serial : 0) >= 50)
478 1 write_sync(s);
479
480 /* emit 'table.0.entries.time' record every 500ms */
481
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 64 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts - (wctx->nb_st_pairs ? wctx->st_pairs[wctx->nb_st_pairs - 1].value : 0) >= 5000000)
482 2 add_serial_pair(&wctx->st_pairs, &wctx->nb_st_pairs, wctx->serial, pkt->pts);
483
484
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 64 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts > wctx->last_pts) {
485 26 wctx->last_pts = pkt->pts;
486 26 wctx->last_serial = wctx->serial;
487 }
488
489 // write timestamp chunk
490 64 write_timestamp(s, pkt);
491
492 64 write_chunk_header(s, &ff_data_guid, pkt->size, INDEX_BASE + pkt->stream_index);
493 64 avio_write(pb, pkt->data, pkt->size);
494 64 write_pad(pb, WTV_PAD8(pkt->size) - pkt->size);
495
496 64 wctx->serial++;
497 64 return 0;
498 }
499
500 1 static int write_table0_header_events(AVIOContext *pb)
501 {
502 1 avio_wl32(pb, 0x10);
503 1 write_pad(pb, 84);
504 1 avio_wl64(pb, 0x32);
505 1 return 96;
506 }
507
508 1 static int write_table0_header_legacy_attrib(AVIOContext *pb)
509 {
510 1 int pad = 0;
511 1 avio_wl32(pb, 0xFFFFFFFF);
512 1 write_pad(pb, 12);
513 1 avio_write(pb, legacy_attrib, sizeof(legacy_attrib));
514 1 pad = WTV_PAD8(sizeof(legacy_attrib)) - sizeof(legacy_attrib);
515 1 write_pad(pb, pad);
516 1 write_pad(pb, 32);
517 1 return 48 + WTV_PAD8(sizeof(legacy_attrib));
518 }
519
520 1 static int write_table0_header_time(AVIOContext *pb)
521 {
522 1 avio_wl32(pb, 0x10);
523 1 write_pad(pb, 76);
524 1 avio_wl64(pb, 0x40);
525 1 return 88;
526 }
527
528 static const WTVRootEntryTable wtv_root_entry_table[] = {
529 { timeline_table_0_header_events, sizeof(timeline_table_0_header_events), write_table0_header_events},
530 { ff_timeline_table_0_entries_Events_le16, sizeof(ff_timeline_table_0_entries_Events_le16), NULL},
531 { ff_timeline_le16, sizeof(ff_timeline_le16), NULL},
532 { table_0_header_legacy_attrib, sizeof(table_0_header_legacy_attrib), write_table0_header_legacy_attrib},
533 { ff_table_0_entries_legacy_attrib_le16, sizeof(ff_table_0_entries_legacy_attrib_le16), NULL},
534 { table_0_redirector_legacy_attrib, sizeof(table_0_redirector_legacy_attrib), NULL},
535 { table_0_header_time, sizeof(table_0_header_time), write_table0_header_time},
536 { ff_table_0_entries_time_le16, sizeof(ff_table_0_entries_time_le16), NULL},
537 };
538
539 1 static int write_root_table(AVFormatContext *s, int64_t sector_pos)
540 {
541 1 AVIOContext *pb = s->pb;
542 1 WtvContext *wctx = s->priv_data;
543 int size, pad;
544 int i;
545
546 1 const WTVRootEntryTable *h = wtv_root_entry_table;
547
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 9 for (i = 0; i < sizeof(wtv_root_entry_table)/sizeof(WTVRootEntryTable); i++, h++) {
548 8 WtvFile *w = &wctx->file[i];
549 8 int filename_padding = WTV_PAD8(h->header_size) - h->header_size;
550 8 WTVHeaderWriteFunc *write = h->write_header;
551 8 int len = 0;
552 int64_t len_pos;
553
554 8 ff_put_guid(pb, &ff_dir_entry_guid);
555 8 len_pos = avio_tell(pb);
556 8 avio_wl16(pb, 40 + h->header_size + filename_padding + 8); // maybe updated later
557 8 write_pad(pb, 6);
558
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 8 avio_wl64(pb, write ? 0 : w->length);// maybe update later
559 8 avio_wl32(pb, (h->header_size + filename_padding) >> 1);
560 8 write_pad(pb, 4);
561
562 8 avio_write(pb, h->header, h->header_size);
563 8 write_pad(pb, filename_padding);
564
565
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 8 if (write) {
566 3 len = write(pb);
567 // update length field
568 3 avio_seek(pb, len_pos, SEEK_SET);
569 3 avio_wl64(pb, 40 + h->header_size + filename_padding + len);
570 3 avio_wl64(pb, len |(1ULL<<62) | (1ULL<<60));
571 3 avio_seek(pb, 8 + h->header_size + filename_padding + len, SEEK_CUR);
572 } else {
573 5 avio_wl32(pb, w->first_sector);
574 5 avio_wl32(pb, w->depth);
575 }
576 }
577
578 // calculate root table size
579 1 size = avio_tell(pb) - sector_pos;
580 1 pad = WTV_SECTOR_SIZE- size;
581 1 write_pad(pb, pad);
582
583 1 return size;
584 }
585
586 1 static void write_fat(AVIOContext *pb, int start_sector, int nb_sectors, int shift)
587 {
588 int i;
589
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 95 for (i = 0; i < nb_sectors; i++) {
590 94 avio_wl32(pb, start_sector + (i << shift));
591 }
592 // pad left sector pointer size
593 1 write_pad(pb, WTV_SECTOR_SIZE - ((nb_sectors << 2) % WTV_SECTOR_SIZE));
594 1 }
595
596 1 static int64_t write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth)
597 {
598 1 int64_t start_sector = start_pos >> WTV_SECTOR_BITS;
599 1 int shift = sector_bits - WTV_SECTOR_BITS;
600
601 1 int64_t fat = avio_tell(s->pb);
602 1 write_fat(s->pb, start_sector, nb_sectors, shift);
603
604
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 1 if (depth == 2) {
605 ✗ int64_t start_sector1 = fat >> WTV_SECTOR_BITS;
606 ✗ int nb_sectors1 = ((nb_sectors << 2) + WTV_SECTOR_SIZE - 1) / WTV_SECTOR_SIZE;
607 ✗ int64_t fat1 = avio_tell(s->pb);
608
609 ✗ write_fat(s->pb, start_sector1, nb_sectors1, 0);
610 ✗ return fat1;
611 }
612
613 1 return fat;
614 }
615
616 1 static void write_table_entries_events(AVFormatContext *s)
617 {
618 1 AVIOContext *pb = s->pb;
619 1 WtvContext *wctx = s->priv_data;
620 int i;
621
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 3 for (i = 0; i < wctx->nb_sp_pairs; i++) {
622 2 avio_wl64(pb, wctx->sp_pairs[i].serial);
623 2 avio_wl64(pb, wctx->sp_pairs[i].value);
624 }
625 1 }
626
627 1 static void write_table_entries_time(AVFormatContext *s)
628 {
629 1 AVIOContext *pb = s->pb;
630 1 WtvContext *wctx = s->priv_data;
631 int i;
632
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 3 for (i = 0; i < wctx->nb_st_pairs; i++) {
633 2 avio_wl64(pb, wctx->st_pairs[i].value);
634 2 avio_wl64(pb, wctx->st_pairs[i].serial);
635 }
636 1 avio_wl64(pb, wctx->last_pts);
637 1 avio_wl64(pb, wctx->last_serial);
638 1 }
639
640 1 static void write_metadata_header(AVIOContext *pb, int type, const char *key, int value_size)
641 {
642 1 ff_put_guid(pb, &ff_metadata_guid);
643 1 avio_wl32(pb, type);
644 1 avio_wl32(pb, value_size);
645 1 avio_put_str16le(pb, key);
646 1 }
647
648 1 static int metadata_header_size(const char *key)
649 {
650 1 return 16 + 4 + 4 + strlen(key)*2 + 2;
651 }
652
653 ✗ static void write_tag_int32(AVIOContext *pb, const char *key, int value)
654 {
655 ✗ write_metadata_header(pb, 0, key, 4);
656 ✗ avio_wl32(pb, value);
657 ✗ }
658
659 1 static void write_tag(AVIOContext *pb, const char *key, const char *value)
660 {
661 1 write_metadata_header(pb, 1, key, strlen(value)*2 + 2);
662 1 avio_put_str16le(pb, value);
663 1 }
664
665 ✗ static int attachment_value_size(const AVPacket *pkt, const AVDictionaryEntry *e)
666 {
667 ✗ return strlen("image/jpeg")*2 + 2 + 1 + (e ? strlen(e->value)*2 : 0) + 2 + 4 + pkt->size;
668 }
669
670 1 static void write_table_entries_attrib(AVFormatContext *s)
671 {
672 1 WtvContext *wctx = s->priv_data;
673 1 AVIOContext *pb = s->pb;
674 1 const AVDictionaryEntry *tag = NULL;
675
676 1 ff_standardize_creation_time(s);
677 //FIXME: translate special tags (e.g. WM/Bitrate) to binary representation
678 1 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
679
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 2 while ((tag = av_dict_iterate(s->metadata, tag)))
680 1 write_tag(pb, tag->key, tag->value);
681
682
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 1 if (wctx->thumbnail.size) {
683 ✗ AVStream *st = s->streams[wctx->thumbnail.stream_index];
684 ✗ tag = av_dict_get(st->metadata, "title", NULL, 0);
685 ✗ write_metadata_header(pb, 2, "WM/Picture", attachment_value_size(&wctx->thumbnail, tag));
686
687 ✗ avio_put_str16le(pb, "image/jpeg");
688 ✗ avio_w8(pb, 0x10);
689 ✗ avio_put_str16le(pb, tag ? tag->value : "");
690
691 ✗ avio_wl32(pb, wctx->thumbnail.size);
692 ✗ avio_write(pb, wctx->thumbnail.data, wctx->thumbnail.size);
693
694 ✗ write_tag_int32(pb, "WM/MediaThumbType", 2);
695 }
696 1 }
697
698 1 static void write_table_redirector_legacy_attrib(AVFormatContext *s)
699 {
700 1 WtvContext *wctx = s->priv_data;
701 1 AVIOContext *pb = s->pb;
702 1 const AVDictionaryEntry *tag = NULL;
703 1 int64_t pos = 0;
704
705 //FIXME: translate special tags to binary representation
706
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 2 while ((tag = av_dict_iterate(s->metadata, tag))) {
707 1 avio_wl64(pb, pos);
708 1 pos += metadata_header_size(tag->key) + strlen(tag->value)*2 + 2;
709 }
710
711
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 1 if (wctx->thumbnail.size) {
712 ✗ AVStream *st = s->streams[wctx->thumbnail.stream_index];
713 ✗ avio_wl64(pb, pos);
714 ✗ pos += metadata_header_size("WM/Picture") + attachment_value_size(&wctx->thumbnail, av_dict_get(st->metadata, "title", NULL, 0));
715
716 ✗ avio_wl64(pb, pos);
717 ✗ pos += metadata_header_size("WM/MediaThumbType") + 4;
718 }
719 1 }
720
721 /**
722 * Pad the remainder of a file
723 * Write out fat table
724 * @return <0 on error
725 */
726 5 static int finish_file(AVFormatContext *s, enum WtvFileIndex index, int64_t start_pos)
727 {
728 5 WtvContext *wctx = s->priv_data;
729 5 AVIOContext *pb = s->pb;
730 5 WtvFile *w = &wctx->file[index];
731 5 int64_t end_pos = avio_tell(pb);
732 int sector_bits, nb_sectors, pad;
733
734
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 5 av_assert0(index < WTV_FILES);
735
736 5 w->length = (end_pos - start_pos);
737
738 // determine optimal fat table depth, sector_bits, nb_sectors
739
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 5 if (w->length <= WTV_SECTOR_SIZE) {
740 4 w->depth = 0;
741 4 sector_bits = WTV_SECTOR_BITS;
742
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 1 } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) {
743 1 w->depth = 1;
744 1 sector_bits = WTV_SECTOR_BITS;
745 ✗ } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) {
746 ✗ w->depth = 1;
747 ✗ sector_bits = WTV_BIGSECTOR_BITS;
748 ✗ } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) {
749 ✗ w->depth = 2;
750 ✗ sector_bits = WTV_SECTOR_BITS;
751 ✗ } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) {
752 ✗ w->depth = 2;
753 ✗ sector_bits = WTV_BIGSECTOR_BITS;
754 } else {
755 ✗ av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (%"PRIi64" bytes)\n", w->length);
756 ✗ return -1;
757 }
758
759 // determine the nb_sectors
760 5 nb_sectors = (int)(w->length >> sector_bits);
761
762 // pad sector of timeline
763 5 pad = (1 << sector_bits) - (w->length % (1 << sector_bits));
764
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 5 if (pad) {
765 5 nb_sectors++;
766 5 write_pad(pb, pad);
767 }
768
769 //write fat table
770
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 5 if (w->depth > 0) {
771 1 w->first_sector = write_fat_sector(s, start_pos, nb_sectors, sector_bits, w->depth) >> WTV_SECTOR_BITS;
772 } else {
773 4 w->first_sector = start_pos >> WTV_SECTOR_BITS;
774 }
775
776 5 w->length |= 1ULL<<60;
777
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 5 if (sector_bits == WTV_SECTOR_BITS)
778 5 w->length |= 1ULL<<63;
779
780 5 return 0;
781 }
782
783 1 static int write_trailer(AVFormatContext *s)
784 {
785 1 WtvContext *wctx = s->priv_data;
786 1 AVIOContext *pb = s->pb;
787 int root_size;
788 int64_t sector_pos;
789 int64_t start_pos, file_end_pos;
790
791
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 1 if (finish_file(s, WTV_TIMELINE, wctx->timeline_start_pos) < 0)
792 ✗ return -1;
793
794 1 start_pos = avio_tell(pb);
795 1 write_table_entries_events(s);
796
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 1 if (finish_file(s, WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS, start_pos) < 0)
797 ✗ return -1;
798
799 1 start_pos = avio_tell(pb);
800 1 write_table_entries_attrib(s);
801
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 1 if (finish_file(s, WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB, start_pos) < 0)
802 ✗ return -1;
803
804 1 start_pos = avio_tell(pb);
805 1 write_table_redirector_legacy_attrib(s);
806
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 1 if (finish_file(s, WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB, start_pos) < 0)
807 ✗ return -1;
808
809 1 start_pos = avio_tell(pb);
810 1 write_table_entries_time(s);
811
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 1 if (finish_file(s, WTV_TABLE_0_ENTRIES_TIME, start_pos) < 0)
812 ✗ return -1;
813
814 // write root table
815 1 sector_pos = avio_tell(pb);
816 1 root_size = write_root_table(s, sector_pos);
817
818 1 file_end_pos = avio_tell(pb);
819 // update root value
820 1 avio_seek(pb, 0x30, SEEK_SET);
821 1 avio_wl32(pb, root_size);
822 1 avio_seek(pb, 4, SEEK_CUR);
823 1 avio_wl32(pb, sector_pos >> WTV_SECTOR_BITS);
824 1 avio_seek(pb, 0x5c, SEEK_SET);
825 1 avio_wl32(pb, file_end_pos >> WTV_SECTOR_BITS);
826
827 1 av_free(wctx->sp_pairs);
828 1 av_free(wctx->st_pairs);
829 1 av_packet_unref(&wctx->thumbnail);
830 1 return 0;
831 }
832
833 const FFOutputFormat ff_wtv_muxer = {
834 .p.name = "wtv",
835 .p.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
836 .p.extensions = "wtv",
837 .priv_data_size = sizeof(WtvContext),
838 .p.audio_codec = AV_CODEC_ID_AC3,
839 .p.video_codec = AV_CODEC_ID_MPEG2VIDEO,
840 .write_header = write_header,
841 .write_packet = write_packet,
842 .write_trailer = write_trailer,
843 .p.codec_tag = ff_riff_codec_tags_list,
844 };
845