FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/wtvenc.c
Date: 2024-02-16 17:37:06
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 "avformat.h"
30 #include "avio_internal.h"
31 #include "internal.h"
32 #include "mpegts.h"
33 #include "mux.h"
34 #include "wtv.h"
35
36 #define WTV_BIGSECTOR_SIZE (1 << WTV_BIGSECTOR_BITS)
37 #define INDEX_BASE 0x2
38 #define MAX_NB_INDEX 10
39
40 /* declare utf16le strings */
41 #define _ , 0,
42 static const uint8_t timeline_table_0_header_events[] =
43 {'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};
44 static const uint8_t table_0_header_legacy_attrib[] =
45 {'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};
46 static const uint8_t table_0_redirector_legacy_attrib[] =
47 {'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};
48 static const uint8_t table_0_header_time[] =
49 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'t'_'i'_'m'_'e', 0};
50 static const uint8_t legacy_attrib[] =
51 {'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
52 #undef _
53
54 static const ff_asf_guid sub_wtv_guid =
55 {0x8C,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
56
57 enum WtvFileIndex {
58 WTV_TIMELINE_TABLE_0_HEADER_EVENTS = 0,
59 WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS,
60 WTV_TIMELINE,
61 WTV_TABLE_0_HEADER_LEGACY_ATTRIB,
62 WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB,
63 WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB,
64 WTV_TABLE_0_HEADER_TIME,
65 WTV_TABLE_0_ENTRIES_TIME,
66 WTV_FILES
67 };
68
69 typedef struct {
70 int64_t length;
71 const void *header;
72 int depth;
73 int first_sector;
74 } WtvFile;
75
76 typedef struct {
77 int64_t pos;
78 int64_t serial;
79 const ff_asf_guid * guid;
80 int stream_id;
81 } WtvChunkEntry;
82
83 typedef struct {
84 int64_t serial;
85 int64_t value;
86 } WtvSyncEntry;
87
88 typedef struct {
89 int64_t timeline_start_pos;
90 WtvFile file[WTV_FILES];
91 int64_t serial; /**< chunk serial number */
92 int64_t last_chunk_pos; /**< last chunk position */
93 int64_t last_timestamp_pos; /**< last timestamp chunk position */
94 int64_t first_index_pos; /**< first index_chunk position */
95
96 WtvChunkEntry index[MAX_NB_INDEX];
97 int nb_index;
98 int first_video_flag;
99
100 WtvSyncEntry *st_pairs; /* (serial, timestamp) pairs */
101 int nb_st_pairs;
102 WtvSyncEntry *sp_pairs; /* (serial, position) pairs */
103 int nb_sp_pairs;
104
105 int64_t last_pts;
106 int64_t last_serial;
107
108 AVPacket thumbnail;
109 } WtvContext;
110
111
112 4 static void add_serial_pair(WtvSyncEntry ** list, int * count, int64_t serial, int64_t value)
113 {
114 4 int new_count = *count + 1;
115 4 WtvSyncEntry *new_list = av_realloc_array(*list, new_count, sizeof(WtvSyncEntry));
116
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4 if (!new_list)
117 return;
118 4 new_list[*count] = (WtvSyncEntry){serial, value};
119 4 *list = new_list;
120 4 *count = new_count;
121 }
122
123 typedef int WTVHeaderWriteFunc(AVIOContext *pb);
124
125 typedef struct {
126 const uint8_t *header;
127 int header_size;
128 WTVHeaderWriteFunc *write_header;
129 } WTVRootEntryTable;
130
131 #define write_pad(pb, size) ffio_fill(pb, 0, size)
132
133 /**
134 * Write chunk header. If header chunk (0x80000000 set) then add to list of header chunks
135 */
136 135 static void write_chunk_header(AVFormatContext *s, const ff_asf_guid *guid, int length, int stream_id)
137 {
138 135 WtvContext *wctx = s->priv_data;
139 135 AVIOContext *pb = s->pb;
140
141 135 wctx->last_chunk_pos = avio_tell(pb) - wctx->timeline_start_pos;
142 135 ff_put_guid(pb, guid);
143 135 avio_wl32(pb, 32 + length);
144 135 avio_wl32(pb, stream_id);
145 135 avio_wl64(pb, wctx->serial);
146
147
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135 if ((stream_id & 0x80000000) && guid != &ff_index_guid) {
148 4 WtvChunkEntry *t = wctx->index + wctx->nb_index;
149
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4 av_assert0(wctx->nb_index < MAX_NB_INDEX);
150 4 t->pos = wctx->last_chunk_pos;
151 4 t->serial = wctx->serial;
152 4 t->guid = guid;
153 4 t->stream_id = stream_id & 0x3FFFFFFF;
154 4 wctx->nb_index++;
155 }
156 135 }
157
158 5 static void write_chunk_header2(AVFormatContext *s, const ff_asf_guid *guid, int stream_id)
159 {
160 5 WtvContext *wctx = s->priv_data;
161 5 AVIOContext *pb = s->pb;
162
163 5 int64_t last_chunk_pos = wctx->last_chunk_pos;
164 5 write_chunk_header(s, guid, 0, stream_id); // length updated later
165 5 avio_wl64(pb, last_chunk_pos);
166 5 }
167
168 7 static void finish_chunk_noindex(AVFormatContext *s)
169 {
170 7 WtvContext *wctx = s->priv_data;
171 7 AVIOContext *pb = s->pb;
172
173 // update the chunk_len field and pad.
174 7 int64_t chunk_len = avio_tell(pb) - (wctx->last_chunk_pos + wctx->timeline_start_pos);
175 7 avio_seek(pb, -(chunk_len - 16), SEEK_CUR);
176 7 avio_wl32(pb, chunk_len);
177 7 avio_seek(pb, chunk_len - (16 + 4), SEEK_CUR);
178
179 7 write_pad(pb, WTV_PAD8(chunk_len) - chunk_len);
180 7 wctx->serial++;
181 7 }
182
183 1 static void write_index(AVFormatContext *s)
184 {
185 1 AVIOContext *pb = s->pb;
186 1 WtvContext *wctx = s->priv_data;
187 int i;
188
189 1 write_chunk_header2(s, &ff_index_guid, 0x80000000);
190 1 avio_wl32(pb, 0);
191 1 avio_wl32(pb, 0);
192
193
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5 for (i = 0; i < wctx->nb_index; i++) {
194 4 WtvChunkEntry *t = wctx->index + i;
195 4 ff_put_guid(pb, t->guid);
196 4 avio_wl64(pb, t->pos);
197 4 avio_wl32(pb, t->stream_id);
198 4 avio_wl32(pb, 0); // checksum?
199 4 avio_wl64(pb, t->serial);
200 }
201 1 wctx->nb_index = 0; // reset index
202 1 finish_chunk_noindex(s);
203
204
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1 if (!wctx->first_index_pos)
205 1 wctx->first_index_pos = wctx->last_chunk_pos;
206 1 }
207
208 6 static void finish_chunk(AVFormatContext *s)
209 {
210 6 WtvContext *wctx = s->priv_data;
211 6 finish_chunk_noindex(s);
212
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6 if (wctx->nb_index == MAX_NB_INDEX)
213 write_index(s);
214 6 }
215
216 2 static void put_videoinfoheader2(AVIOContext *pb, AVStream *st)
217 {
218 2 AVRational dar = av_mul_q(st->sample_aspect_ratio, (AVRational){st->codecpar->width, st->codecpar->height});
219 unsigned int num, den;
220 2 av_reduce(&num, &den, dar.num, dar.den, 0xFFFFFFFF);
221
222 /* VIDEOINFOHEADER2 */
223 2 avio_wl32(pb, 0);
224 2 avio_wl32(pb, 0);
225 2 avio_wl32(pb, st->codecpar->width);
226 2 avio_wl32(pb, st->codecpar->height);
227
228 2 avio_wl32(pb, 0);
229 2 avio_wl32(pb, 0);
230 2 avio_wl32(pb, 0);
231 2 avio_wl32(pb, 0);
232
233 2 avio_wl32(pb, st->codecpar->bit_rate);
234 2 avio_wl32(pb, 0);
235
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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);
236 2 avio_wl32(pb, 0);
237 2 avio_wl32(pb, 0);
238
239 2 avio_wl32(pb, num);
240 2 avio_wl32(pb, den);
241 2 avio_wl32(pb, 0);
242 2 avio_wl32(pb, 0);
243
244 2 ff_put_bmp_header(pb, st->codecpar, 0, 1, 0);
245
246
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2 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
247
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2 int padding = (st->codecpar->extradata_size & 3) ? 4 - (st->codecpar->extradata_size & 3) : 0;
248 /* MPEG2VIDEOINFO */
249 2 avio_wl32(pb, 0);
250 2 avio_wl32(pb, st->codecpar->extradata_size + padding);
251 2 avio_wl32(pb, -1);
252 2 avio_wl32(pb, -1);
253 2 avio_wl32(pb, 0);
254 2 avio_write(pb, st->codecpar->extradata, st->codecpar->extradata_size);
255 2 ffio_fill(pb, 0, padding);
256 }
257 2 }
258
259 4 static int write_stream_codec_info(AVFormatContext *s, AVStream *st)
260 {
261 const ff_asf_guid *g, *media_type, *format_type;
262 const AVCodecTag *tags;
263 4 AVIOContext *pb = s->pb;
264 int64_t hdr_pos_start;
265 4 int hdr_size = 0;
266
267
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4 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
268 2 g = ff_get_codec_guid(st->codecpar->codec_id, ff_video_guids);
269 2 media_type = &ff_mediatype_video;
270
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2 format_type = st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO ? &ff_format_mpeg2_video : &ff_format_videoinfo2;
271 2 tags = ff_codec_bmp_tags;
272
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2 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
273 2 g = ff_get_codec_guid(st->codecpar->codec_id, ff_codec_wav_guids);
274 2 media_type = &ff_mediatype_audio;
275 2 format_type = &ff_format_waveformatex;
276 2 tags = ff_codec_wav_tags;
277 } else {
278 av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codecpar->codec_type);
279 return -1;
280 }
281
282 4 ff_put_guid(pb, media_type); // mediatype
283 4 ff_put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype
284 4 write_pad(pb, 12);
285 4 ff_put_guid(pb,&ff_format_cpfilters_processed); // format type
286 4 avio_wl32(pb, 0); // size
287
288 4 hdr_pos_start = avio_tell(pb);
289
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4 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
290 2 put_videoinfoheader2(pb, st);
291 } else {
292
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2 if (ff_put_wav_header(s, pb, st->codecpar, 0) < 0)
293 format_type = &ff_format_none;
294 }
295 4 hdr_size = avio_tell(pb) - hdr_pos_start;
296
297 // seek back write hdr_size
298 4 avio_seek(pb, -(hdr_size + 4), SEEK_CUR);
299 4 avio_wl32(pb, hdr_size + 32);
300 4 avio_seek(pb, hdr_size, SEEK_CUR);
301
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4 if (g) {
302 4 ff_put_guid(pb, g); // actual_subtype
303 } else {
304 int tag = ff_codec_get_tag(tags, st->codecpar->codec_id);
305 if (!tag) {
306 av_log(s, AV_LOG_ERROR, "unsupported codec_id (0x%x)\n", st->codecpar->codec_id);
307 return -1;
308 }
309 avio_wl32(pb, tag);
310 avio_write(pb, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12);
311 }
312 4 ff_put_guid(pb, format_type); // actual_formattype
313
314 4 return 0;
315 }
316
317 2 static int write_stream_codec(AVFormatContext *s, AVStream * st)
318 {
319 2 AVIOContext *pb = s->pb;
320 int ret;
321 2 write_chunk_header2(s, &ff_stream1_guid, 0x80000000 | 0x01);
322
323 2 avio_wl32(pb, 0x01);
324 2 write_pad(pb, 4);
325 2 write_pad(pb, 4);
326
327 2 ret = write_stream_codec_info(s, st);
328
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2 if (ret < 0) {
329 av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type);
330 return -1;
331 }
332
333 2 finish_chunk(s);
334 2 return 0;
335 }
336
337 2 static void write_sync(AVFormatContext *s)
338 {
339 2 AVIOContext *pb = s->pb;
340 2 WtvContext *wctx = s->priv_data;
341 2 int64_t last_chunk_pos = wctx->last_chunk_pos;
342
343 2 write_chunk_header(s, &ff_sync_guid, 0x18, 0);
344 2 avio_wl64(pb, wctx->first_index_pos);
345 2 avio_wl64(pb, wctx->last_timestamp_pos);
346 2 avio_wl64(pb, 0);
347
348 2 finish_chunk(s);
349 2 add_serial_pair(&wctx->sp_pairs, &wctx->nb_sp_pairs, wctx->serial, wctx->last_chunk_pos);
350
351 2 wctx->last_chunk_pos = last_chunk_pos;
352 2 }
353
354 2 static int write_stream_data(AVFormatContext *s, AVStream *st)
355 {
356 2 AVIOContext *pb = s->pb;
357 int ret;
358
359 2 write_chunk_header2(s, &ff_SBE2_STREAM_DESC_EVENT, 0x80000000 | (st->index + INDEX_BASE));
360 2 avio_wl32(pb, 0x00000001);
361 2 avio_wl32(pb, st->index + INDEX_BASE); //stream_id
362 2 avio_wl32(pb, 0x00000001);
363 2 write_pad(pb, 8);
364
365 2 ret = write_stream_codec_info(s, st);
366
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2 if (ret < 0) {
367 av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type);
368 return -1;
369 }
370 2 finish_chunk(s);
371
372 2 avpriv_set_pts_info(st, 64, 1, 10000000);
373
374 2 return 0;
375 }
376
377 1 static int write_header(AVFormatContext *s)
378 {
379 1 AVIOContext *pb = s->pb;
380 1 WtvContext *wctx = s->priv_data;
381 int i, pad, ret;
382 AVStream *st;
383
384 1 wctx->last_chunk_pos = -1;
385 1 wctx->last_timestamp_pos = -1;
386
387 1 ff_put_guid(pb, &ff_wtv_guid);
388 1 ff_put_guid(pb, &sub_wtv_guid);
389
390 1 avio_wl32(pb, 0x01);
391 1 avio_wl32(pb, 0x02);
392 1 avio_wl32(pb, 1 << WTV_SECTOR_BITS);
393 1 avio_wl32(pb, 1 << WTV_BIGSECTOR_BITS);
394
395 //write initial root fields
396 1 avio_wl32(pb, 0); // root_size, update later
397 1 write_pad(pb, 4);
398 1 avio_wl32(pb, 0); // root_sector, update it later.
399
400 1 write_pad(pb, 32);
401 1 avio_wl32(pb, 0); // file ends pointer, update it later.
402
403 1 pad = (1 << WTV_SECTOR_BITS) - avio_tell(pb);
404 1 write_pad(pb, pad);
405
406 1 wctx->timeline_start_pos = avio_tell(pb);
407
408 1 wctx->serial = 1;
409 1 wctx->last_chunk_pos = -1;
410 1 wctx->first_video_flag = 1;
411
412
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3 for (i = 0; i < s->nb_streams; i++) {
413 2 st = s->streams[i];
414
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2 if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG)
415 continue;
416 2 ret = write_stream_codec(s, st);
417
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2 if (ret < 0) {
418 av_log(s, AV_LOG_ERROR, "write stream codec failed codec_type(0x%x)\n", st->codecpar->codec_type);
419 return -1;
420 }
421
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2 if (!i)
422 1 write_sync(s);
423 }
424
425
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3 for (i = 0; i < s->nb_streams; i++) {
426 2 st = s->streams[i];
427
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2 if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG)
428 continue;
429 2 ret = write_stream_data(s, st);
430
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2 if (ret < 0) {
431 av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codecpar->codec_type);
432 return -1;
433 }
434 }
435
436
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1 if (wctx->nb_index)
437 1 write_index(s);
438
439 1 return 0;
440 }
441
442 64 static void write_timestamp(AVFormatContext *s, AVPacket *pkt)
443 {
444 64 AVIOContext *pb = s->pb;
445 64 WtvContext *wctx = s->priv_data;
446 64 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
447
448 64 write_chunk_header(s, &ff_timestamp_guid, 56, 0x40000000 | (INDEX_BASE + pkt->stream_index));
449 64 write_pad(pb, 8);
450
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64 avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
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 64 avio_wl64(pb, 0);
454
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64 avio_wl64(pb, par->codec_type == AVMEDIA_TYPE_VIDEO && (pkt->flags & AV_PKT_FLAG_KEY) ? 1 : 0);
455 64 avio_wl64(pb, 0);
456
457 64 wctx->last_timestamp_pos = wctx->last_chunk_pos;
458 64 }
459
460 64 static int write_packet(AVFormatContext *s, AVPacket *pkt)
461 {
462 64 AVIOContext *pb = s->pb;
463 64 WtvContext *wctx = s->priv_data;
464 64 AVStream *st = s->streams[pkt->stream_index];
465
466
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64 if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && !wctx->thumbnail.size) {
467 av_packet_ref(&wctx->thumbnail, pkt);
468 return 0;
469
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64 } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
470 int ret = ff_check_h264_startcode(s, st, pkt);
471 if (ret < 0)
472 return ret;
473 }
474
475 /* emit sync chunk and 'timeline.table.0.entries.Event' record every 50 frames */
476
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64 if (wctx->serial - (wctx->nb_sp_pairs ? wctx->sp_pairs[wctx->nb_sp_pairs - 1].serial : 0) >= 50)
477 1 write_sync(s);
478
479 /* emit 'table.0.entries.time' record every 500ms */
480
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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)
481 2 add_serial_pair(&wctx->st_pairs, &wctx->nb_st_pairs, wctx->serial, pkt->pts);
482
483
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64 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts > wctx->last_pts) {
484 26 wctx->last_pts = pkt->pts;
485 26 wctx->last_serial = wctx->serial;
486 }
487
488 // write timestamp chunk
489 64 write_timestamp(s, pkt);
490
491 64 write_chunk_header(s, &ff_data_guid, pkt->size, INDEX_BASE + pkt->stream_index);
492 64 avio_write(pb, pkt->data, pkt->size);
493 64 write_pad(pb, WTV_PAD8(pkt->size) - pkt->size);
494
495 64 wctx->serial++;
496 64 return 0;
497 }
498
499 1 static int write_table0_header_events(AVIOContext *pb)
500 {
501 1 avio_wl32(pb, 0x10);
502 1 write_pad(pb, 84);
503 1 avio_wl64(pb, 0x32);
504 1 return 96;
505 }
506
507 1 static int write_table0_header_legacy_attrib(AVIOContext *pb)
508 {
509 1 int pad = 0;
510 1 avio_wl32(pb, 0xFFFFFFFF);
511 1 write_pad(pb, 12);
512 1 avio_write(pb, legacy_attrib, sizeof(legacy_attrib));
513 1 pad = WTV_PAD8(sizeof(legacy_attrib)) - sizeof(legacy_attrib);
514 1 write_pad(pb, pad);
515 1 write_pad(pb, 32);
516 1 return 48 + WTV_PAD8(sizeof(legacy_attrib));
517 }
518
519 1 static int write_table0_header_time(AVIOContext *pb)
520 {
521 1 avio_wl32(pb, 0x10);
522 1 write_pad(pb, 76);
523 1 avio_wl64(pb, 0x40);
524 1 return 88;
525 }
526
527 static const WTVRootEntryTable wtv_root_entry_table[] = {
528 { timeline_table_0_header_events, sizeof(timeline_table_0_header_events), write_table0_header_events},
529 { ff_timeline_table_0_entries_Events_le16, sizeof(ff_timeline_table_0_entries_Events_le16), NULL},
530 { ff_timeline_le16, sizeof(ff_timeline_le16), NULL},
531 { table_0_header_legacy_attrib, sizeof(table_0_header_legacy_attrib), write_table0_header_legacy_attrib},
532 { ff_table_0_entries_legacy_attrib_le16, sizeof(ff_table_0_entries_legacy_attrib_le16), NULL},
533 { table_0_redirector_legacy_attrib, sizeof(table_0_redirector_legacy_attrib), NULL},
534 { table_0_header_time, sizeof(table_0_header_time), write_table0_header_time},
535 { ff_table_0_entries_time_le16, sizeof(ff_table_0_entries_time_le16), NULL},
536 };
537
538 1 static int write_root_table(AVFormatContext *s, int64_t sector_pos)
539 {
540 1 AVIOContext *pb = s->pb;
541 1 WtvContext *wctx = s->priv_data;
542 int size, pad;
543 int i;
544
545 1 const WTVRootEntryTable *h = wtv_root_entry_table;
546
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9 for (i = 0; i < sizeof(wtv_root_entry_table)/sizeof(WTVRootEntryTable); i++, h++) {
547 8 WtvFile *w = &wctx->file[i];
548 8 int filename_padding = WTV_PAD8(h->header_size) - h->header_size;
549 8 WTVHeaderWriteFunc *write = h->write_header;
550 8 int len = 0;
551 int64_t len_pos;
552
553 8 ff_put_guid(pb, &ff_dir_entry_guid);
554 8 len_pos = avio_tell(pb);
555 8 avio_wl16(pb, 40 + h->header_size + filename_padding + 8); // maybe updated later
556 8 write_pad(pb, 6);
557
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8 avio_wl64(pb, write ? 0 : w->length);// maybe update later
558 8 avio_wl32(pb, (h->header_size + filename_padding) >> 1);
559 8 write_pad(pb, 4);
560
561 8 avio_write(pb, h->header, h->header_size);
562 8 write_pad(pb, filename_padding);
563
564
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8 if (write) {
565 3 len = write(pb);
566 // update length field
567 3 avio_seek(pb, len_pos, SEEK_SET);
568 3 avio_wl64(pb, 40 + h->header_size + filename_padding + len);
569 3 avio_wl64(pb, len |(1ULL<<62) | (1ULL<<60));
570 3 avio_seek(pb, 8 + h->header_size + filename_padding + len, SEEK_CUR);
571 } else {
572 5 avio_wl32(pb, w->first_sector);
573 5 avio_wl32(pb, w->depth);
574 }
575 }
576
577 // caculate root table size
578 1 size = avio_tell(pb) - sector_pos;
579 1 pad = WTV_SECTOR_SIZE- size;
580 1 write_pad(pb, pad);
581
582 1 return size;
583 }
584
585 1 static void write_fat(AVIOContext *pb, int start_sector, int nb_sectors, int shift)
586 {
587 int i;
588
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95 for (i = 0; i < nb_sectors; i++) {
589 94 avio_wl32(pb, start_sector + (i << shift));
590 }
591 // pad left sector pointer size
592 1 write_pad(pb, WTV_SECTOR_SIZE - ((nb_sectors << 2) % WTV_SECTOR_SIZE));
593 1 }
594
595 1 static int64_t write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth)
596 {
597 1 int64_t start_sector = start_pos >> WTV_SECTOR_BITS;
598 1 int shift = sector_bits - WTV_SECTOR_BITS;
599
600 1 int64_t fat = avio_tell(s->pb);
601 1 write_fat(s->pb, start_sector, nb_sectors, shift);
602
603
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1 if (depth == 2) {
604 int64_t start_sector1 = fat >> WTV_SECTOR_BITS;
605 int nb_sectors1 = ((nb_sectors << 2) + WTV_SECTOR_SIZE - 1) / WTV_SECTOR_SIZE;
606 int64_t fat1 = avio_tell(s->pb);
607
608 write_fat(s->pb, start_sector1, nb_sectors1, 0);
609 return fat1;
610 }
611
612 1 return fat;
613 }
614
615 1 static void write_table_entries_events(AVFormatContext *s)
616 {
617 1 AVIOContext *pb = s->pb;
618 1 WtvContext *wctx = s->priv_data;
619 int i;
620
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3 for (i = 0; i < wctx->nb_sp_pairs; i++) {
621 2 avio_wl64(pb, wctx->sp_pairs[i].serial);
622 2 avio_wl64(pb, wctx->sp_pairs[i].value);
623 }
624 1 }
625
626 1 static void write_table_entries_time(AVFormatContext *s)
627 {
628 1 AVIOContext *pb = s->pb;
629 1 WtvContext *wctx = s->priv_data;
630 int i;
631
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3 for (i = 0; i < wctx->nb_st_pairs; i++) {
632 2 avio_wl64(pb, wctx->st_pairs[i].value);
633 2 avio_wl64(pb, wctx->st_pairs[i].serial);
634 }
635 1 avio_wl64(pb, wctx->last_pts);
636 1 avio_wl64(pb, wctx->last_serial);
637 1 }
638
639 1 static void write_metadata_header(AVIOContext *pb, int type, const char *key, int value_size)
640 {
641 1 ff_put_guid(pb, &ff_metadata_guid);
642 1 avio_wl32(pb, type);
643 1 avio_wl32(pb, value_size);
644 1 avio_put_str16le(pb, key);
645 1 }
646
647 1 static int metadata_header_size(const char *key)
648 {
649 1 return 16 + 4 + 4 + strlen(key)*2 + 2;
650 }
651
652 static void write_tag_int32(AVIOContext *pb, const char *key, int value)
653 {
654 write_metadata_header(pb, 0, key, 4);
655 avio_wl32(pb, value);
656 }
657
658 1 static void write_tag(AVIOContext *pb, const char *key, const char *value)
659 {
660 1 write_metadata_header(pb, 1, key, strlen(value)*2 + 2);
661 1 avio_put_str16le(pb, value);
662 1 }
663
664 static int attachment_value_size(const AVPacket *pkt, const AVDictionaryEntry *e)
665 {
666 return strlen("image/jpeg")*2 + 2 + 1 + (e ? strlen(e->value)*2 : 0) + 2 + 4 + pkt->size;
667 }
668
669 1 static void write_table_entries_attrib(AVFormatContext *s)
670 {
671 1 WtvContext *wctx = s->priv_data;
672 1 AVIOContext *pb = s->pb;
673 1 const AVDictionaryEntry *tag = NULL;
674
675 1 ff_standardize_creation_time(s);
676 //FIXME: translate special tags (e.g. WM/Bitrate) to binary representation
677 1 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
678
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2 while ((tag = av_dict_iterate(s->metadata, tag)))
679 1 write_tag(pb, tag->key, tag->value);
680
681
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1 if (wctx->thumbnail.size) {
682 AVStream *st = s->streams[wctx->thumbnail.stream_index];
683 tag = av_dict_get(st->metadata, "title", NULL, 0);
684 write_metadata_header(pb, 2, "WM/Picture", attachment_value_size(&wctx->thumbnail, tag));
685
686 avio_put_str16le(pb, "image/jpeg");
687 avio_w8(pb, 0x10);
688 avio_put_str16le(pb, tag ? tag->value : "");
689
690 avio_wl32(pb, wctx->thumbnail.size);
691 avio_write(pb, wctx->thumbnail.data, wctx->thumbnail.size);
692
693 write_tag_int32(pb, "WM/MediaThumbType", 2);
694 }
695 1 }
696
697 1 static void write_table_redirector_legacy_attrib(AVFormatContext *s)
698 {
699 1 WtvContext *wctx = s->priv_data;
700 1 AVIOContext *pb = s->pb;
701 1 const AVDictionaryEntry *tag = NULL;
702 1 int64_t pos = 0;
703
704 //FIXME: translate special tags to binary representation
705
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2 while ((tag = av_dict_iterate(s->metadata, tag))) {
706 1 avio_wl64(pb, pos);
707 1 pos += metadata_header_size(tag->key) + strlen(tag->value)*2 + 2;
708 }
709
710
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1 if (wctx->thumbnail.size) {
711 AVStream *st = s->streams[wctx->thumbnail.stream_index];
712 avio_wl64(pb, pos);
713 pos += metadata_header_size("WM/Picture") + attachment_value_size(&wctx->thumbnail, av_dict_get(st->metadata, "title", NULL, 0));
714
715 avio_wl64(pb, pos);
716 pos += metadata_header_size("WM/MediaThumbType") + 4;
717 }
718 1 }
719
720 /**
721 * Pad the remainder of a file
722 * Write out fat table
723 * @return <0 on error
724 */
725 5 static int finish_file(AVFormatContext *s, enum WtvFileIndex index, int64_t start_pos)
726 {
727 5 WtvContext *wctx = s->priv_data;
728 5 AVIOContext *pb = s->pb;
729 5 WtvFile *w = &wctx->file[index];
730 5 int64_t end_pos = avio_tell(pb);
731 int sector_bits, nb_sectors, pad;
732
733
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5 av_assert0(index < WTV_FILES);
734
735 5 w->length = (end_pos - start_pos);
736
737 // determine optimal fat table depth, sector_bits, nb_sectors
738
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5 if (w->length <= WTV_SECTOR_SIZE) {
739 4 w->depth = 0;
740 4 sector_bits = WTV_SECTOR_BITS;
741
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1 } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) {
742 1 w->depth = 1;
743 1 sector_bits = WTV_SECTOR_BITS;
744 } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) {
745 w->depth = 1;
746 sector_bits = WTV_BIGSECTOR_BITS;
747 } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) {
748 w->depth = 2;
749 sector_bits = WTV_SECTOR_BITS;
750 } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) {
751 w->depth = 2;
752 sector_bits = WTV_BIGSECTOR_BITS;
753 } else {
754 av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (%"PRIi64" bytes)\n", w->length);
755 return -1;
756 }
757
758 // determine the nb_sectors
759 5 nb_sectors = (int)(w->length >> sector_bits);
760
761 // pad sector of timeline
762 5 pad = (1 << sector_bits) - (w->length % (1 << sector_bits));
763
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5 if (pad) {
764 5 nb_sectors++;
765 5 write_pad(pb, pad);
766 }
767
768 //write fat table
769
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5 if (w->depth > 0) {
770 1 w->first_sector = write_fat_sector(s, start_pos, nb_sectors, sector_bits, w->depth) >> WTV_SECTOR_BITS;
771 } else {
772 4 w->first_sector = start_pos >> WTV_SECTOR_BITS;
773 }
774
775 5 w->length |= 1ULL<<60;
776
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5 if (sector_bits == WTV_SECTOR_BITS)
777 5 w->length |= 1ULL<<63;
778
779 5 return 0;
780 }
781
782 1 static int write_trailer(AVFormatContext *s)
783 {
784 1 WtvContext *wctx = s->priv_data;
785 1 AVIOContext *pb = s->pb;
786 int root_size;
787 int64_t sector_pos;
788 int64_t start_pos, file_end_pos;
789
790
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1 if (finish_file(s, WTV_TIMELINE, wctx->timeline_start_pos) < 0)
791 return -1;
792
793 1 start_pos = avio_tell(pb);
794 1 write_table_entries_events(s);
795
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1 if (finish_file(s, WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS, start_pos) < 0)
796 return -1;
797
798 1 start_pos = avio_tell(pb);
799 1 write_table_entries_attrib(s);
800
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1 if (finish_file(s, WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB, start_pos) < 0)
801 return -1;
802
803 1 start_pos = avio_tell(pb);
804 1 write_table_redirector_legacy_attrib(s);
805
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1 if (finish_file(s, WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB, start_pos) < 0)
806 return -1;
807
808 1 start_pos = avio_tell(pb);
809 1 write_table_entries_time(s);
810
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1 if (finish_file(s, WTV_TABLE_0_ENTRIES_TIME, start_pos) < 0)
811 return -1;
812
813 // write root table
814 1 sector_pos = avio_tell(pb);
815 1 root_size = write_root_table(s, sector_pos);
816
817 1 file_end_pos = avio_tell(pb);
818 // update root value
819 1 avio_seek(pb, 0x30, SEEK_SET);
820 1 avio_wl32(pb, root_size);
821 1 avio_seek(pb, 4, SEEK_CUR);
822 1 avio_wl32(pb, sector_pos >> WTV_SECTOR_BITS);
823 1 avio_seek(pb, 0x5c, SEEK_SET);
824 1 avio_wl32(pb, file_end_pos >> WTV_SECTOR_BITS);
825
826 1 av_free(wctx->sp_pairs);
827 1 av_free(wctx->st_pairs);
828 1 av_packet_unref(&wctx->thumbnail);
829 1 return 0;
830 }
831
832 const FFOutputFormat ff_wtv_muxer = {
833 .p.name = "wtv",
834 .p.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
835 .p.extensions = "wtv",
836 .priv_data_size = sizeof(WtvContext),
837 .p.audio_codec = AV_CODEC_ID_AC3,
838 .p.video_codec = AV_CODEC_ID_MPEG2VIDEO,
839 .write_header = write_header,
840 .write_packet = write_packet,
841 .write_trailer = write_trailer,
842 .p.codec_tag = ff_riff_codec_tags_list,
843 };
844