FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/nutenc.c
Date: 2024-05-26 22:00:00
Exec Total Coverage
Lines: 639 774 82.6%
Functions: 25 26 96.2%
Branches: 351 473 74.2%

Line Branch Exec Source
1 /*
2 * nut muxer
3 * Copyright (c) 2004-2007 Michael Niedermayer
4 *
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 #include <stdint.h>
23
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/mem.h"
27 #include "libavutil/tree.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/time.h"
31 #include "libavutil/opt.h"
32 #include "libavcodec/bytestream.h"
33 #include "libavcodec/mpegaudiodata.h"
34 #include "mux.h"
35 #include "nut.h"
36 #include "internal.h"
37 #include "avio_internal.h"
38 #include "riff.h"
39 #include "version.h"
40
41 /**
42 * Chooses a timebase for muxing the specified stream.
43 *
44 * The chosen timebase allows sample accurate timestamps based
45 * on the framerate or sample rate for audio streams. It also is
46 * at least as precise as 1/min_precision would be.
47 */
48 2363 static AVRational choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
49 {
50 2363 AVRational q = st->time_base;
51
52
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18904 for (int j = 2; j < 14; j += 1 + (j > 2))
53
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16660 while (q.den / q.num < min_precision && q.num % j == 0)
54 119 q.num /= j;
55
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28315 while (q.den / q.num < min_precision && q.den < (1<<24))
56 25952 q.den <<= 1;
57
58 2363 return q;
59 }
60
61 3107 static int find_expected_header(AVCodecParameters *p, int size, int key_frame,
62 uint8_t out[64])
63 {
64 3107 int sample_rate = p->sample_rate;
65
66
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3107 if (size > 4096)
67 return 0;
68
69 3107 AV_WB24(out, 1);
70
71
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3107 if (p->codec_id == AV_CODEC_ID_MPEG4) {
72 if (key_frame) {
73 return 3;
74 } else {
75 out[3] = 0xB6;
76 return 4;
77 }
78
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3107 } else if (p->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
79
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3107 p->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
80 return 3;
81
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3107 } else if (p->codec_id == AV_CODEC_ID_H264) {
82 return 3;
83
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3107 } else if (p->codec_id == AV_CODEC_ID_MP3 ||
84
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3107 p->codec_id == AV_CODEC_ID_MP2) {
85 int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size;
86
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126 int layer = p->codec_id == AV_CODEC_ID_MP3 ? 3 : 2;
87 126 unsigned int header = 0xFFF00000;
88
89 126 lsf = sample_rate < (24000 + 32000) / 2;
90 126 mpeg25 = sample_rate < (12000 + 16000) / 2;
91 126 sample_rate <<= lsf + mpeg25;
92
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126 if (sample_rate < (32000 + 44100) / 2) sample_rate_index = 2;
93
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126 else if (sample_rate < (44100 + 48000) / 2) sample_rate_index = 0;
94 else sample_rate_index = 1;
95
96 126 sample_rate = ff_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25);
97
98
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3568 for (bitrate_index = 2; bitrate_index < 30; bitrate_index++) {
99 3446 frame_size =
100 3446 ff_mpa_bitrate_tab[lsf][layer - 1][bitrate_index >> 1];
101 3446 frame_size = (frame_size * 144000) / (sample_rate << lsf) +
102 3446 (bitrate_index & 1);
103
104
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3446 if (frame_size == size)
105 4 break;
106 }
107
108
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126 header |= (!lsf) << 19;
109 126 header |= (4 - layer) << 17;
110 126 header |= 1 << 16; //no crc
111 126 AV_WB32(out, header);
112
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126 if (size <= 0)
113 122 return 2; //we guess there is no crc, if there is one the user clearly does not care about overhead
114
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4 if (bitrate_index == 30)
115 return -1; //something is wrong ...
116
117 4 header |= (bitrate_index >> 1) << 12;
118 4 header |= sample_rate_index << 10;
119 4 header |= (bitrate_index & 1) << 9;
120
121 4 return 2; //FIXME actually put the needed ones in build_elision_headers()
122 //return 3; //we guess that the private bit is not set
123 //FIXME the above assumptions should be checked, if these turn out false too often something should be done
124 }
125 2981 return 0;
126 }
127
128 3107 static int find_header_idx(AVFormatContext *s, AVCodecParameters *p, int size,
129 int frame_type)
130 {
131 3107 NUTContext *nut = s->priv_data;
132 uint8_t out[64];
133 int i;
134 3107 int len = find_expected_header(p, size, frame_type, out);
135
136
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21623 for (i = 1; i < nut->header_count; i++) {
137
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18642 if (len == nut->header_len[i] && !memcmp(out, nut->header[i], len)) {
138 126 return i;
139 }
140 }
141
142 2981 return 0;
143 }
144
145 2373 static void build_elision_headers(AVFormatContext *s)
146 {
147 2373 NUTContext *nut = s->priv_data;
148 int i;
149 //FIXME this is lame
150 //FIXME write a 2pass mode to find the maximal headers
151 static const uint8_t headers[][5] = {
152 { 3, 0x00, 0x00, 0x01 },
153 { 4, 0x00, 0x00, 0x01, 0xB6},
154 { 2, 0xFF, 0xFA }, //mp3+crc
155 { 2, 0xFF, 0xFB }, //mp3
156 { 2, 0xFF, 0xFC }, //mp2+crc
157 { 2, 0xFF, 0xFD }, //mp2
158 };
159
160 2373 nut->header_count = 7;
161
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16611 for (i = 1; i < nut->header_count; i++) {
162 14238 nut->header_len[i] = headers[i - 1][0];
163 14238 nut->header[i] = &headers[i - 1][1];
164 }
165 2373 }
166
167 2373 static void build_frame_code(AVFormatContext *s)
168 {
169 2373 NUTContext *nut = s->priv_data;
170 int key_frame, index, pred, stream_id;
171 2373 int start = 1;
172 2373 int end = 254;
173 2373 int keyframe_0_esc = s->nb_streams > 2;
174 int pred_table[10];
175 FrameCode *ft;
176
177 2373 ft = &nut->frame_code[start];
178 2373 ft->flags = FLAG_CODED;
179 2373 ft->size_mul = 1;
180 2373 ft->pts_delta = 1;
181 2373 start++;
182
183
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2373 if (keyframe_0_esc) {
184 /* keyframe = 0 escape */
185 1 FrameCode *ft = &nut->frame_code[start];
186 1 ft->flags = FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS;
187 1 ft->size_mul = 1;
188 1 start++;
189 }
190
191
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4750 for (stream_id = 0; stream_id < s->nb_streams; stream_id++) {
192 2377 int start2 = start + (end - start) * stream_id / s->nb_streams;
193 2377 int end2 = start + (end - start) * (stream_id + 1) / s->nb_streams;
194 2377 AVCodecParameters *par = s->streams[stream_id]->codecpar;
195 2377 int is_audio = par->codec_type == AVMEDIA_TYPE_AUDIO;
196 2377 int intra_only = /*codec->intra_only || */ is_audio;
197 int pred_count;
198 2377 int frame_size = 0;
199
200
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2377 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
201 14 frame_size = av_get_audio_frame_duration2(par, 0);
202
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14 if (par->codec_id == AV_CODEC_ID_VORBIS && !frame_size)
203 frame_size = 64;
204 } else {
205 2363 AVRational f = av_div_q(av_inv_q(s->streams[stream_id]->avg_frame_rate), *nut->stream[stream_id].time_base);
206
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2363 if (f.den == 1 && f.num>0)
207 2362 frame_size = f.num;
208 }
209
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2377 if (!frame_size)
210 14 frame_size = 1;
211
212
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7131 for (key_frame = 0; key_frame < 2; key_frame++) {
213
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4754 if (!intra_only || !keyframe_0_esc || key_frame != 0) {
214 4753 FrameCode *ft = &nut->frame_code[start2];
215 4753 ft->flags = FLAG_KEY * key_frame;
216 4753 ft->flags |= FLAG_SIZE_MSB | FLAG_CODED_PTS;
217 4753 ft->stream_id = stream_id;
218 4753 ft->size_mul = 1;
219
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4753 if (is_audio)
220 27 ft->header_idx = find_header_idx(s, par, -1, key_frame);
221 4753 start2++;
222 }
223 }
224
225 2377 key_frame = intra_only;
226 #if 1
227
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2377 if (is_audio) {
228 int frame_bytes;
229 int pts;
230
231
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14 if (par->block_align > 0) {
232 13 frame_bytes = par->block_align;
233 } else {
234 1 int frame_size = av_get_audio_frame_duration2(par, 0);
235 1 frame_bytes = frame_size * (int64_t)par->bit_rate / (8 * par->sample_rate);
236 }
237
238
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42 for (pts = 0; pts < 2; pts++) {
239
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84 for (pred = 0; pred < 2; pred++) {
240 56 FrameCode *ft = &nut->frame_code[start2];
241 56 ft->flags = FLAG_KEY * key_frame;
242 56 ft->stream_id = stream_id;
243 56 ft->size_mul = frame_bytes + 2;
244 56 ft->size_lsb = frame_bytes + pred;
245 56 ft->pts_delta = pts * frame_size;
246 56 ft->header_idx = find_header_idx(s, par, frame_bytes + pred, key_frame);
247 56 start2++;
248 }
249 }
250 } else {
251 2363 FrameCode *ft = &nut->frame_code[start2];
252 2363 ft->flags = FLAG_KEY | FLAG_SIZE_MSB;
253 2363 ft->stream_id = stream_id;
254 2363 ft->size_mul = 1;
255 2363 ft->pts_delta = frame_size;
256 2363 start2++;
257 }
258 #endif
259
260
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2377 if (par->video_delay) {
261 2 pred_count = 5;
262 2 pred_table[0] = -2;
263 2 pred_table[1] = -1;
264 2 pred_table[2] = 1;
265 2 pred_table[3] = 3;
266 2 pred_table[4] = 4;
267
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2375 } else if (par->codec_id == AV_CODEC_ID_VORBIS) {
268 pred_count = 3;
269 pred_table[0] = 2;
270 pred_table[1] = 9;
271 pred_table[2] = 16;
272 } else {
273 2375 pred_count = 1;
274 2375 pred_table[0] = 1;
275 }
276
277
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4762 for (pred = 0; pred < pred_count; pred++) {
278 2385 int start3 = start2 + (end2 - start2) * pred / pred_count;
279 2385 int end3 = start2 + (end2 - start2) * (pred + 1) / pred_count;
280
281 2385 pred_table[pred] *= frame_size;
282
283
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593208 for (index = start3; index < end3; index++) {
284 590823 FrameCode *ft = &nut->frame_code[index];
285 590823 ft->flags = FLAG_KEY * key_frame;
286 590823 ft->flags |= FLAG_SIZE_MSB;
287 590823 ft->stream_id = stream_id;
288 //FIXME use single byte size and pred from last
289 590823 ft->size_mul = end3 - start3;
290 590823 ft->size_lsb = index - start3;
291 590823 ft->pts_delta = pred_table[pred];
292
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590823 if (is_audio)
293 3024 ft->header_idx = find_header_idx(s, par, -1, key_frame);
294 }
295 }
296 }
297 2373 memmove(&nut->frame_code['N' + 1], &nut->frame_code['N'], sizeof(FrameCode) * (255 - 'N'));
298 2373 nut->frame_code[0].flags =
299 2373 nut->frame_code[255].flags =
300 2373 nut->frame_code['N'].flags = FLAG_INVALID;
301 2373 }
302
303 /**
304 * Get the length in bytes which is needed to store val as v.
305 */
306 240918 static int get_v_length(uint64_t val)
307 {
308 240918 int i = 1;
309
310
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310490 while (val >>= 7)
311 69572 i++;
312
313 240918 return i;
314 }
315
316 /**
317 * Put val using a variable number of bytes.
318 */
319 228071 static void put_v(AVIOContext *bc, uint64_t val)
320 {
321 228071 int i = get_v_length(val);
322
323
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282828 while (--i > 0)
324 54757 avio_w8(bc, 128 | (uint8_t)(val >> (7*i)));
325
326 228071 avio_w8(bc, val & 127);
327 228071 }
328
329 6841 static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val)
330 {
331 6841 val *= nut->time_base_count;
332 6841 val += time_base - nut->time_base;
333 6841 put_v(bc, val);
334 6841 }
335 /**
336 * Store a string as vb.
337 */
338 9532 static void put_str(AVIOContext *bc, const char *string)
339 {
340 9532 size_t len = strlen(string);
341
342 9532 put_v(bc, len);
343 9532 avio_write(bc, string, len);
344 9532 }
345
346 19038 static void put_s(AVIOContext *bc, int64_t val)
347 {
348 19038 put_v(bc, 2 * FFABS(val) - (val > 0));
349 19038 }
350
351 16341 static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc,
352 uint64_t startcode)
353 {
354 16341 uint8_t *dyn_buf = NULL;
355 16341 int dyn_size = avio_get_dyn_buf(dyn_bc, &dyn_buf);
356 16341 int forw_ptr = dyn_size + 4;
357
358
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16341 if (forw_ptr > 4096)
359 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
360 16341 avio_wb64(bc, startcode);
361 16341 put_v(bc, forw_ptr);
362
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16341 if (forw_ptr > 4096)
363 avio_wl32(bc, ffio_get_checksum(bc));
364
365 16341 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
366 16341 avio_write(bc, dyn_buf, dyn_size);
367 16341 avio_wl32(bc, ffio_get_checksum(bc));
368
369 16341 ffio_reset_dyn_buf(dyn_bc);
370 16341 }
371
372 2373 static void write_mainheader(NUTContext *nut, AVIOContext *bc)
373 {
374 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields,
375 tmp_head_idx;
376 int64_t tmp_match;
377
378 2373 put_v(bc, nut->version);
379
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2373 if (nut->version > 3)
380 2 put_v(bc, nut->minor_version = 1);
381 2373 put_v(bc, nut->avf->nb_streams);
382 2373 put_v(bc, nut->max_distance);
383 2373 put_v(bc, nut->time_base_count);
384
385
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4749 for (i = 0; i < nut->time_base_count; i++) {
386 2376 put_v(bc, nut->time_base[i].num);
387 2376 put_v(bc, nut->time_base[i].den);
388 }
389
390 2373 tmp_pts = 0;
391 2373 tmp_mul = 1;
392 2373 tmp_stream = 0;
393 2373 tmp_match = 1 - (1LL << 62);
394 2373 tmp_head_idx = 0;
395
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19022 for (i = 0; i < 256; ) {
396 16649 tmp_fields = 0;
397 16649 tmp_size = 0;
398 // tmp_res=0;
399
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16649 if (tmp_pts != nut->frame_code[i].pts_delta ) tmp_fields = 1;
400
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16649 if (tmp_mul != nut->frame_code[i].size_mul ) tmp_fields = 2;
401
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16649 if (tmp_stream != nut->frame_code[i].stream_id ) tmp_fields = 3;
402
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16649 if (tmp_size != nut->frame_code[i].size_lsb ) tmp_fields = 4;
403 // if (tmp_res != nut->frame_code[i].res ) tmp_fields=5;
404
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16649 if (tmp_head_idx != nut->frame_code[i].header_idx) tmp_fields = 8;
405
406 16649 tmp_pts = nut->frame_code[i].pts_delta;
407 16649 tmp_flags = nut->frame_code[i].flags;
408 16649 tmp_stream = nut->frame_code[i].stream_id;
409 16649 tmp_mul = nut->frame_code[i].size_mul;
410 16649 tmp_size = nut->frame_code[i].size_lsb;
411 // tmp_res = nut->frame_code[i].res;
412 16649 tmp_head_idx = nut->frame_code[i].header_idx;
413
414
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624137 for (j = 0; i < 256; j++, i++) {
415
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621764 if (i == 'N') {
416 2373 j--;
417 2373 continue;
418 }
419
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619391 if (nut->frame_code[i].pts_delta != tmp_pts ||
420
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609881 nut->frame_code[i].flags != tmp_flags ||
421
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605115 nut->frame_code[i].stream_id != tmp_stream ||
422
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605115 nut->frame_code[i].size_mul != tmp_mul ||
423
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605115 nut->frame_code[i].size_lsb != tmp_size + j ||
424 // nut->frame_code[i].res != tmp_res ||
425
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605115 nut->frame_code[i].header_idx != tmp_head_idx)
426 break;
427 }
428
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16649 if (j != tmp_mul - tmp_size)
429 4746 tmp_fields = 6;
430
431 16649 put_v(bc, tmp_flags);
432 16649 put_v(bc, tmp_fields);
433
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16649 if (tmp_fields > 0) put_s(bc, tmp_pts);
434
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16649 if (tmp_fields > 1) put_v(bc, tmp_mul);
435
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16649 if (tmp_fields > 2) put_v(bc, tmp_stream);
436
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16649 if (tmp_fields > 3) put_v(bc, tmp_size);
437
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16649 if (tmp_fields > 4) put_v(bc, 0 /*tmp_res*/);
438
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16649 if (tmp_fields > 5) put_v(bc, j);
439
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16649 if (tmp_fields > 6) put_v(bc, tmp_match);
440
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16649 if (tmp_fields > 7) put_v(bc, tmp_head_idx);
441 }
442 2373 put_v(bc, nut->header_count - 1);
443
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16611 for (i = 1; i < nut->header_count; i++) {
444 14238 put_v(bc, nut->header_len[i]);
445 14238 avio_write(bc, nut->header[i], nut->header_len[i]);
446 }
447 // flags had been effectively introduced in version 4
448
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2373 if (nut->version > 3)
449 2 put_v(bc, nut->flags);
450 2373 }
451
452 2377 static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc,
453 AVStream *st, int i)
454 {
455 2377 NUTContext *nut = avctx->priv_data;
456 2377 AVCodecParameters *par = st->codecpar;
457
458 2377 put_v(bc, i);
459
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2377 switch (par->codec_type) {
460 2363 case AVMEDIA_TYPE_VIDEO: put_v(bc, 0); break;
461 14 case AVMEDIA_TYPE_AUDIO: put_v(bc, 1); break;
462 case AVMEDIA_TYPE_SUBTITLE: put_v(bc, 2); break;
463 default: put_v(bc, 3); break;
464 }
465 2377 put_v(bc, 4);
466
467
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2377 if (par->codec_tag) {
468 2377 avio_wl32(bc, par->codec_tag);
469 } else {
470 av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i);
471 return AVERROR(EINVAL);
472 }
473
474 2377 put_v(bc, nut->stream[i].time_base - nut->time_base);
475 2377 put_v(bc, nut->stream[i].msb_pts_shift);
476 2377 put_v(bc, nut->stream[i].max_pts_distance);
477 2377 put_v(bc, par->video_delay);
478 2377 avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
479
480 2377 put_v(bc, par->extradata_size);
481 2377 avio_write(bc, par->extradata, par->extradata_size);
482
483
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2377 switch (par->codec_type) {
484 14 case AVMEDIA_TYPE_AUDIO:
485 14 put_v(bc, par->sample_rate);
486 14 put_v(bc, 1);
487 14 put_v(bc, par->ch_layout.nb_channels);
488 14 break;
489 2363 case AVMEDIA_TYPE_VIDEO:
490 2363 put_v(bc, par->width);
491 2363 put_v(bc, par->height);
492
493
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2363 if (st->sample_aspect_ratio.num <= 0 ||
494
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5 st->sample_aspect_ratio.den <= 0) {
495 2358 put_v(bc, 0);
496 2358 put_v(bc, 0);
497 } else {
498 5 put_v(bc, st->sample_aspect_ratio.num);
499 5 put_v(bc, st->sample_aspect_ratio.den);
500 }
501 2363 put_v(bc, 0); /* csp type -- unknown */
502 2363 break;
503 default:
504 break;
505 }
506 2377 return 0;
507 }
508
509 4764 static int add_info(AVIOContext *bc, const char *type, const char *value)
510 {
511 4764 put_str(bc, type);
512 4764 put_s(bc, -1);
513 4764 put_str(bc, value);
514 4764 return 1;
515 }
516
517 2373 static int write_globalinfo(NUTContext *nut, AVIOContext *bc)
518 {
519 2373 AVFormatContext *s = nut->avf;
520 2373 const AVDictionaryEntry *t = NULL;
521 AVIOContext *dyn_bc;
522 2373 uint8_t *dyn_buf = NULL;
523 2373 int count = 0, dyn_size;
524 2373 int ret = avio_open_dyn_buf(&dyn_bc);
525
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2373 if (ret < 0)
526 return ret;
527
528 2373 ff_standardize_creation_time(s);
529
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2383 while ((t = av_dict_iterate(s->metadata, t)))
530 10 count += add_info(dyn_bc, t->key, t->value);
531
532 2373 put_v(bc, 0); //stream_if_plus1
533 2373 put_v(bc, 0); //chapter_id
534 2373 put_v(bc, 0); //timestamp_start
535 2373 put_v(bc, 0); //length
536
537 2373 put_v(bc, count);
538
539 2373 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
540 2373 avio_write(bc, dyn_buf, dyn_size);
541 2373 av_free(dyn_buf);
542 2373 return 0;
543 }
544
545 2377 static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) {
546 2377 AVFormatContext *s= nut->avf;
547 2377 AVStream* st = s->streams[stream_id];
548 2377 const AVDictionaryEntry *t = NULL;
549 AVIOContext *dyn_bc;
550 2377 uint8_t *dyn_buf=NULL;
551 2377 int count=0, dyn_size, i;
552 2377 int ret = avio_open_dyn_buf(&dyn_bc);
553
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2377 if (ret < 0)
554 return ret;
555
556
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4765 while ((t = av_dict_iterate(st->metadata, t)))
557 2388 count += add_info(dyn_bc, t->key, t->value);
558
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16639 for (i=0; ff_nut_dispositions[i].flag; ++i) {
559
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14262 if (st->disposition & ff_nut_dispositions[i].flag)
560 3 count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str);
561 }
562
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2377 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
563 uint8_t buf[256];
564
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2363 if (st->r_frame_rate.num>0 && st->r_frame_rate.den>0)
565 2 snprintf(buf, sizeof(buf), "%d/%d", st->r_frame_rate.num, st->r_frame_rate.den);
566 else
567 2361 snprintf(buf, sizeof(buf), "%d/%d", st->avg_frame_rate.num, st->avg_frame_rate.den);
568 2363 count += add_info(dyn_bc, "r_frame_rate", buf);
569 }
570 2377 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
571
572
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2377 if (count) {
573 2377 put_v(bc, stream_id + 1); //stream_id_plus1
574 2377 put_v(bc, 0); //chapter_id
575 2377 put_v(bc, 0); //timestamp_start
576 2377 put_v(bc, 0); //length
577
578 2377 put_v(bc, count);
579
580 2377 avio_write(bc, dyn_buf, dyn_size);
581 }
582
583 2377 av_free(dyn_buf);
584 2377 return count;
585 }
586
587 static int write_chapter(NUTContext *nut, AVIOContext *bc, int id)
588 {
589 AVIOContext *dyn_bc;
590 uint8_t *dyn_buf = NULL;
591 const AVDictionaryEntry *t = NULL;
592 AVChapter *ch = nut->avf->chapters[id];
593 int ret, dyn_size, count = 0;
594
595 ret = avio_open_dyn_buf(&dyn_bc);
596 if (ret < 0)
597 return ret;
598
599 put_v(bc, 0); // stream_id_plus1
600 put_s(bc, id + 1); // chapter_id
601 put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start
602 put_v(bc, ch->end - ch->start); // chapter_len
603
604 while ((t = av_dict_iterate(ch->metadata, t)))
605 count += add_info(dyn_bc, t->key, t->value);
606
607 put_v(bc, count);
608
609 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
610 avio_write(bc, dyn_buf, dyn_size);
611 av_freep(&dyn_buf);
612 return 0;
613 }
614
615 2373 static int write_index(NUTContext *nut, AVIOContext *bc) {
616 int i;
617 2373 Syncpoint dummy= { .pos= 0 };
618 2373 Syncpoint *next_node[2] = { NULL };
619 2373 int64_t startpos = avio_tell(bc);
620 int64_t payload_size;
621
622 2373 put_tt(nut, nut->max_pts_tb, bc, nut->max_pts);
623
624 2373 put_v(bc, nut->sp_count);
625
626
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6841 for (i=0; i<nut->sp_count; i++) {
627 4468 av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, (void**)next_node);
628 4468 put_v(bc, (next_node[1]->pos >> 4) - (dummy.pos>>4));
629 4468 dummy.pos = next_node[1]->pos;
630 }
631
632
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4750 for (i=0; i<nut->avf->nb_streams; i++) {
633 2377 StreamContext *nus= &nut->stream[i];
634 2377 int64_t last_pts= -1;
635 int j, k;
636
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5020 for (j=0; j<nut->sp_count; j++) {
637 int flag;
638 2643 int n = 0;
639
640
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2643 if (j && nus->keyframe_pts[j] == nus->keyframe_pts[j-1]) {
641 av_log(nut->avf, AV_LOG_WARNING, "Multiple keyframes with same PTS\n");
642 nus->keyframe_pts[j] = AV_NOPTS_VALUE;
643 }
644
645 2643 flag = (nus->keyframe_pts[j] != AV_NOPTS_VALUE) ^ (j+1 == nut->sp_count);
646
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4756 for (; j<nut->sp_count && (nus->keyframe_pts[j] != AV_NOPTS_VALUE) == flag; j++)
647 2113 n++;
648
649 2643 put_v(bc, 1 + 2 * flag + 4 * n);
650
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7154 for (k= j - n; k<=j && k<nut->sp_count; k++) {
651
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4511 if (nus->keyframe_pts[k] == AV_NOPTS_VALUE)
652 2453 continue;
653
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2058 av_assert0(nus->keyframe_pts[k] > last_pts);
654 2058 put_v(bc, nus->keyframe_pts[k] - last_pts);
655 2058 last_pts = nus->keyframe_pts[k];
656 }
657 }
658 }
659
660 2373 payload_size = avio_tell(bc) - startpos + 8 + 4;
661
662
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2373 avio_wb64(bc, 8 + payload_size + av_log2(payload_size) / 7 + 1 + 4*(payload_size > 4096));
663
664 2373 return 0;
665 }
666
667 2373 static int write_headers(AVFormatContext *avctx, AVIOContext *bc)
668 {
669 2373 NUTContext *nut = avctx->priv_data;
670 AVIOContext *dyn_bc;
671 int i, ret;
672
673 2373 ff_metadata_conv_ctx(avctx, ff_nut_metadata_conv, NULL);
674
675 2373 ret = avio_open_dyn_buf(&dyn_bc);
676
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2373 if (ret < 0)
677 return ret;
678 2373 write_mainheader(nut, dyn_bc);
679 2373 put_packet(nut, bc, dyn_bc, MAIN_STARTCODE);
680
681
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4750 for (i = 0; i < nut->avf->nb_streams; i++) {
682 2377 ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i);
683
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2377 if (ret < 0) {
684 goto fail;
685 }
686 2377 put_packet(nut, bc, dyn_bc, STREAM_STARTCODE);
687 }
688
689 2373 write_globalinfo(nut, dyn_bc);
690 2373 put_packet(nut, bc, dyn_bc, INFO_STARTCODE);
691
692
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4750 for (i = 0; i < nut->avf->nb_streams; i++) {
693 2377 ret = write_streaminfo(nut, dyn_bc, i);
694
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2377 if (ret > 0)
695 2377 put_packet(nut, bc, dyn_bc, INFO_STARTCODE);
696 else if (ret < 0) {
697 goto fail;
698 }
699 }
700
701
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2373 for (i = 0; i < nut->avf->nb_chapters; i++) {
702 ret = write_chapter(nut, dyn_bc, i);
703 if (ret < 0) {
704 goto fail;
705 }
706 put_packet(nut, bc, dyn_bc, INFO_STARTCODE);
707 }
708
709 2373 nut->last_syncpoint_pos = INT_MIN;
710 2373 nut->header_count++;
711
712 2373 ret = 0;
713 2373 fail:
714 2373 ffio_free_dyn_buf(&dyn_bc);
715
716 2373 return ret;
717 }
718
719 2373 static int nut_write_header(AVFormatContext *s)
720 {
721 2373 NUTContext *nut = s->priv_data;
722 2373 AVIOContext *bc = s->pb;
723 int i, j, ret;
724
725 2373 nut->avf = s;
726
727
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2373 nut->version = FFMAX(NUT_STABLE_VERSION, 3 + !!nut->flags);
728
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2373 if (nut->version > 3 && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
729 av_log(s, AV_LOG_ERROR,
730 "The additional syncpoint modes require version %d, "
731 "that is currently not finalized, "
732 "please set -f_strict experimental in order to enable it.\n",
733 nut->version);
734 return AVERROR_EXPERIMENTAL;
735 }
736
737 2373 nut->stream = av_calloc(s->nb_streams, sizeof(*nut->stream ));
738 2373 nut->chapter = av_calloc(s->nb_chapters, sizeof(*nut->chapter));
739 4746 nut->time_base= av_calloc(s->nb_streams +
740 2373 s->nb_chapters, sizeof(*nut->time_base));
741
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2373 if (!nut->stream || !nut->chapter || !nut->time_base)
742 return AVERROR(ENOMEM);
743
744
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4750 for (i = 0; i < s->nb_streams; i++) {
745 2377 AVStream *st = s->streams[i];
746 int ssize;
747 AVRational time_base;
748 2377 ff_parse_specific_params(st, &time_base.den, &ssize, &time_base.num);
749
750
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2377 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate) {
751 14 time_base = (AVRational) {1, st->codecpar->sample_rate};
752 } else {
753 2363 time_base = choose_timebase(s, st, 48000);
754 }
755
756 2377 avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
757
758
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2381 for (j = 0; j < nut->time_base_count; j++)
759
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5 if (!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))) {
760 1 break;
761 }
762 2377 nut->time_base[j] = time_base;
763 2377 nut->stream[i].time_base = &nut->time_base[j];
764
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2377 if (j == nut->time_base_count)
765 2376 nut->time_base_count++;
766
767
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2377 if (INT64_C(1000) * time_base.num >= time_base.den)
768 nut->stream[i].msb_pts_shift = 7;
769 else
770 2377 nut->stream[i].msb_pts_shift = 14;
771 2377 nut->stream[i].max_pts_distance =
772 2377 FFMAX(time_base.den, time_base.num) / time_base.num;
773 }
774
775
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2373 for (i = 0; i < s->nb_chapters; i++) {
776 AVChapter *ch = s->chapters[i];
777
778 for (j = 0; j < nut->time_base_count; j++)
779 if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational)))
780 break;
781
782 nut->time_base[j] = ch->time_base;
783 nut->chapter[i].time_base = &nut->time_base[j];
784 if (j == nut->time_base_count)
785 nut->time_base_count++;
786 }
787
788 2373 nut->max_distance = MAX_DISTANCE;
789 2373 build_elision_headers(s);
790 2373 build_frame_code(s);
791
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2373 av_assert0(nut->frame_code['N'].flags == FLAG_INVALID);
792
793 2373 avio_write(bc, ID_STRING, strlen(ID_STRING));
794 2373 avio_w8(bc, 0);
795
796
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2373 if ((ret = write_headers(s, bc)) < 0)
797 return ret;
798
799
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2373 if (s->avoid_negative_ts < 0)
800 2373 s->avoid_negative_ts = 1;
801
802 2373 return 0;
803 }
804
805 1237488 static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc,
806 AVPacket *pkt)
807 {
808 1237488 int flags = 0;
809
810
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1237488 if (pkt->flags & AV_PKT_FLAG_KEY)
811 1205738 flags |= FLAG_KEY;
812
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1237488 if (pkt->stream_index != fc->stream_id)
813 22355 flags |= FLAG_STREAM_ID;
814
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1237488 if (pkt->size / fc->size_mul)
815 1237053 flags |= FLAG_SIZE_MSB;
816
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1237488 if (pkt->pts - nus->last_pts != fc->pts_delta)
817 1164254 flags |= FLAG_CODED_PTS;
818
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1237488 if (pkt->side_data_elems && nut->version > 3)
819 508 flags |= FLAG_SM_DATA;
820
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1237488 if (pkt->size > 2 * nut->max_distance)
821 892556 flags |= FLAG_CHECKSUM;
822
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1237488 if (FFABS(pkt->pts - nus->last_pts) > nus->max_pts_distance)
823 flags |= FLAG_CHECKSUM;
824
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1237488 if (fc->header_idx)
825
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8103 if (pkt->size < nut->header_len[fc->header_idx] ||
826
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8103 pkt->size > 4096 ||
827 4953 memcmp(pkt->data, nut->header [fc->header_idx],
828
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4953 nut->header_len[fc->header_idx]))
829 3150 flags |= FLAG_HEADER_IDX;
830
831 1237488 return flags | (fc->flags & FLAG_CODED);
832 }
833
834 4872 static int find_best_header_idx(NUTContext *nut, AVPacket *pkt)
835 {
836 int i;
837 4872 int best_i = 0;
838 4872 int best_len = 0;
839
840
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4872 if (pkt->size > 4096)
841 4532 return 0;
842
843
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2720 for (i = 1; i < nut->header_count; i++)
844
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2380 if (pkt->size >= nut->header_len[i]
845
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2380 && nut->header_len[i] > best_len
846
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1860 && !memcmp(pkt->data, nut->header[i], nut->header_len[i])) {
847 129 best_i = i;
848 129 best_len = nut->header_len[i];
849 }
850 340 return best_i;
851 }
852
853 4 static int write_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta)
854 {
855 int ret, i, dyn_size;
856 unsigned flags;
857 AVIOContext *dyn_bc;
858 4 int sm_data_count = 0;
859 uint8_t tmp[256];
860 uint8_t *dyn_buf;
861
862 4 ret = avio_open_dyn_buf(&dyn_bc);
863
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4 if (ret < 0)
864 return ret;
865
866
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8 for (i = 0; i<pkt->side_data_elems; i++) {
867 4 const uint8_t *data = pkt->side_data[i].data;
868 4 int size = pkt->side_data[i].size;
869 4 const uint8_t *data_end = data + size;
870
871
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4 if (is_meta) {
872
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2 if ( pkt->side_data[i].type == AV_PKT_DATA_METADATA_UPDATE
873
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2 || pkt->side_data[i].type == AV_PKT_DATA_STRINGS_METADATA) {
874 if (!size || data[size-1]) {
875 ret = AVERROR(EINVAL);
876 goto fail;
877 }
878 while (data < data_end) {
879 const uint8_t *key = data;
880 const uint8_t *val = data + strlen(key) + 1;
881
882 if(val >= data_end) {
883 ret = AVERROR(EINVAL);
884 goto fail;
885 }
886 put_str(dyn_bc, key);
887 put_s(dyn_bc, -1);
888 put_str(dyn_bc, val);
889 data = val + strlen(val) + 1;
890 sm_data_count++;
891 }
892 }
893 } else {
894
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2 switch (pkt->side_data[i].type) {
895 2 case AV_PKT_DATA_PALETTE:
896 case AV_PKT_DATA_NEW_EXTRADATA:
897 case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL:
898 default:
899
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2 if (pkt->side_data[i].type == AV_PKT_DATA_PALETTE) {
900 put_str(dyn_bc, "Palette");
901
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2 } else if(pkt->side_data[i].type == AV_PKT_DATA_NEW_EXTRADATA) {
902 2 put_str(dyn_bc, "Extradata");
903 } else if(pkt->side_data[i].type == AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL) {
904 snprintf(tmp, sizeof(tmp), "CodecSpecificSide%"PRId64"", AV_RB64(data));
905 put_str(dyn_bc, tmp);
906 } else {
907 snprintf(tmp, sizeof(tmp), "UserData%s-SD-%d",
908 (s->flags & AVFMT_FLAG_BITEXACT) ? "Lavf" : LIBAVFORMAT_IDENT,
909 pkt->side_data[i].type);
910 put_str(dyn_bc, tmp);
911 }
912 2 put_s(dyn_bc, -2);
913 2 put_str(dyn_bc, "bin");
914 2 put_v(dyn_bc, pkt->side_data[i].size);
915 2 avio_write(dyn_bc, data, pkt->side_data[i].size);
916 2 sm_data_count++;
917 2 break;
918 case AV_PKT_DATA_PARAM_CHANGE:
919 flags = bytestream_get_le32(&data);
920 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
921 put_str(dyn_bc, "SampleRate");
922 put_s(dyn_bc, bytestream_get_le32(&data));
923 sm_data_count++;
924 }
925 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
926 put_str(dyn_bc, "Width");
927 put_s(dyn_bc, bytestream_get_le32(&data));
928 put_str(dyn_bc, "Height");
929 put_s(dyn_bc, bytestream_get_le32(&data));
930 sm_data_count+=2;
931 }
932 break;
933 case AV_PKT_DATA_SKIP_SAMPLES:
934 if (AV_RL32(data)) {
935 put_str(dyn_bc, "SkipStart");
936 put_s(dyn_bc, (unsigned)AV_RL32(data));
937 sm_data_count++;
938 }
939 if (AV_RL32(data+4)) {
940 put_str(dyn_bc, "SkipEnd");
941 put_s(dyn_bc, (unsigned)AV_RL32(data+4));
942 sm_data_count++;
943 }
944 break;
945 case AV_PKT_DATA_METADATA_UPDATE:
946 case AV_PKT_DATA_STRINGS_METADATA:
947 case AV_PKT_DATA_QUALITY_STATS:
948 // belongs into meta, not side data
949 break;
950 }
951 }
952 }
953
954 4 fail:
955 4 put_v(bc, sm_data_count);
956 4 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
957 4 avio_write(bc, dyn_buf, dyn_size);
958 4 av_freep(&dyn_buf);
959
960 4 return ret;
961 }
962
963 4872 static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)
964 {
965 4872 NUTContext *nut = s->priv_data;
966 4872 StreamContext *nus = &nut->stream[pkt->stream_index];
967 4872 AVIOContext *bc = s->pb, *dyn_bc, *sm_bc = NULL;
968 FrameCode *fc;
969 int64_t coded_pts;
970 int best_length, frame_code, flags, needed_flags, i, header_idx;
971 int best_header_idx;
972 4872 int key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY);
973 4872 int store_sp = 0;
974 4872 int ret = 0;
975 4872 int sm_size = 0;
976 4872 int data_size = pkt->size;
977 4872 uint8_t *sm_buf = NULL;
978
979
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4872 if (pkt->pts < 0) {
980 av_log(s, AV_LOG_ERROR,
981 "Negative pts not supported stream %d, pts %"PRId64"\n",
982 pkt->stream_index, pkt->pts);
983 if (pkt->pts == AV_NOPTS_VALUE)
984 av_log(s, AV_LOG_ERROR, "Try to enable the genpts flag\n");
985 return AVERROR(EINVAL);
986 }
987
988
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4872 if (pkt->side_data_elems && nut->version > 3) {
989 2 ret = avio_open_dyn_buf(&sm_bc);
990
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2 if (ret < 0)
991 return ret;
992 2 ret = write_sm_data(s, sm_bc, pkt, 0);
993
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2 if (ret >= 0)
994 2 ret = write_sm_data(s, sm_bc, pkt, 1);
995 2 sm_size = avio_close_dyn_buf(sm_bc, &sm_buf);
996
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2 if (ret < 0)
997 goto fail;
998 2 data_size += sm_size;
999 }
1000
1001
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4872 if (1LL << (20 + 3 * nut->header_count) <= avio_tell(bc))
1002 write_headers(s, bc);
1003
1004
4/4
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4872 if (key_frame && !(nus->last_flags & FLAG_KEY))
1005 2389 store_sp = 1;
1006
1007
2/2
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4872 if (data_size + 30 /*FIXME check*/ + avio_tell(bc) >= nut->last_syncpoint_pos + nut->max_distance)
1008 4477 store_sp = 1;
1009
1010 //FIXME: Ensure store_sp is 1 in the first place.
1011
1012
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4872 if (store_sp &&
1013
4/4
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4481 (!(nut->flags & NUT_PIPE) || nut->last_syncpoint_pos == INT_MIN)) {
1014 4468 int64_t sp_pos = INT64_MAX;
1015
1016 4468 ff_nut_reset_ts(nut, *nus->time_base, pkt->dts);
1017
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8979 for (i = 0; i < s->nb_streams; i++) {
1018 4511 AVStream *st = s->streams[i];
1019 4511 FFStream *const sti = ffstream(st);
1020 4511 int64_t dts_tb = av_rescale_rnd(pkt->dts,
1021 4511 nus->time_base->num * (int64_t)nut->stream[i].time_base->den,
1022 4511 nus->time_base->den * (int64_t)nut->stream[i].time_base->num,
1023 AV_ROUND_DOWN);
1024 4511 int index = av_index_search_timestamp(st, dts_tb,
1025 AVSEEK_FLAG_BACKWARD);
1026
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4511 if (index >= 0) {
1027 2129 sp_pos = FFMIN(sp_pos, sti->index_entries[index].pos);
1028
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2129 if (!nut->write_index && 2*index > sti->nb_index_entries) {
1029 memmove(sti->index_entries,
1030 sti->index_entries + index,
1031 sizeof(*sti->index_entries) * (sti->nb_index_entries - index));
1032 sti->nb_index_entries -= index;
1033 }
1034 }
1035 }
1036
1037 4468 nut->last_syncpoint_pos = avio_tell(bc);
1038 4468 ret = avio_open_dyn_buf(&dyn_bc);
1039
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4468 if (ret < 0)
1040 goto fail;
1041 4468 put_tt(nut, nus->time_base, dyn_bc, pkt->dts);
1042
2/2
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4468 put_v(dyn_bc, sp_pos != INT64_MAX ? (nut->last_syncpoint_pos - sp_pos) >> 4 : 0);
1043
1044
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4468 if (nut->flags & NUT_BROADCAST) {
1045 put_tt(nut, nus->time_base, dyn_bc,
1046 av_rescale_q(av_gettime(), AV_TIME_BASE_Q, *nus->time_base));
1047 }
1048 4468 put_packet(nut, bc, dyn_bc, SYNCPOINT_STARTCODE);
1049 4468 ffio_free_dyn_buf(&dyn_bc);
1050
1051
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4468 if (nut->write_index) {
1052
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4468 if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts)) < 0)
1053 goto fail;
1054
1055
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4468 if ((1ll<<60) % nut->sp_count == 0)
1056
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5940 for (unsigned i = 0; i < s->nb_streams; i++) {
1057 2978 StreamContext *nus = &nut->stream[i];
1058 2978 av_reallocp_array(&nus->keyframe_pts, 2*nut->sp_count, sizeof(*nus->keyframe_pts));
1059
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2978 if (!nus->keyframe_pts) {
1060 ret = AVERROR(ENOMEM);
1061 goto fail;
1062 }
1063
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2978 for (int j = nut->sp_count == 1 ? 0 : nut->sp_count;
1064
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11126 j < 2 * nut->sp_count; j++)
1065 8148 nus->keyframe_pts[j] = AV_NOPTS_VALUE;
1066 }
1067 }
1068 }
1069
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4872 av_assert0(nus->last_pts != AV_NOPTS_VALUE);
1070
1071 4872 coded_pts = pkt->pts & ((1 << nus->msb_pts_shift) - 1);
1072
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4872 if (ff_lsb2full(nus, coded_pts) != pkt->pts)
1073 coded_pts = pkt->pts + (1 << nus->msb_pts_shift);
1074
1075 4872 best_header_idx = find_best_header_idx(nut, pkt);
1076
1077 4872 best_length = INT_MAX;
1078 4872 frame_code = -1;
1079
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1252104 for (i = 0; i < 256; i++) {
1080 1247232 int length = 0;
1081 1247232 FrameCode *fc = &nut->frame_code[i];
1082 1247232 int flags = fc->flags;
1083
1084
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1247232 if (flags & FLAG_INVALID)
1085 14616 continue;
1086 1232616 needed_flags = get_needed_flags(nut, nus, fc, pkt);
1087
1088
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1232616 if (flags & FLAG_CODED) {
1089 4872 length++;
1090 4872 flags = needed_flags;
1091 }
1092
1093
2/2
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1232616 if ((flags & needed_flags) != needed_flags)
1094 1215186 continue;
1095
1096
2/2
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17430 if ((flags ^ needed_flags) & FLAG_KEY)
1097 139 continue;
1098
1099
2/2
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17291 if (flags & FLAG_STREAM_ID)
1100 91 length += get_v_length(pkt->stream_index);
1101
1102
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17291 if (data_size % fc->size_mul != fc->size_lsb)
1103 10735 continue;
1104
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6556 if (flags & FLAG_SIZE_MSB)
1105 6527 length += get_v_length(data_size / fc->size_mul);
1106
1107
2/2
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6556 if (flags & FLAG_CHECKSUM)
1108 3514 length += 4;
1109
1110
2/2
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6556 if (flags & FLAG_CODED_PTS)
1111 6229 length += get_v_length(coded_pts);
1112
1113
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6556 if ( (flags & FLAG_CODED)
1114
2/2
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4872 && nut->header_len[best_header_idx] > nut->header_len[fc->header_idx] + 1) {
1115 84 flags |= FLAG_HEADER_IDX;
1116 }
1117
1118
2/2
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6556 if (flags & FLAG_HEADER_IDX) {
1119 84 length += 1 - nut->header_len[best_header_idx];
1120 } else {
1121 6472 length -= nut->header_len[fc->header_idx];
1122 }
1123
1124 6556 length *= 4;
1125 6556 length += !(flags & FLAG_CODED_PTS);
1126 6556 length += !(flags & FLAG_CHECKSUM);
1127
1128
2/2
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6556 if (length < best_length) {
1129 6480 best_length = length;
1130 6480 frame_code = i;
1131 }
1132 }
1133
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4872 av_assert0(frame_code != -1);
1134
1135 4872 fc = &nut->frame_code[frame_code];
1136 4872 flags = fc->flags;
1137 4872 needed_flags = get_needed_flags(nut, nus, fc, pkt);
1138 4872 header_idx = fc->header_idx;
1139
1140 4872 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
1141 4872 avio_w8(bc, frame_code);
1142
2/2
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4872 if (flags & FLAG_CODED) {
1143 3521 put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED));
1144 3521 flags = needed_flags;
1145 }
1146
2/2
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4872 if (flags & FLAG_STREAM_ID) put_v(bc, pkt->stream_index);
1147
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4872 if (flags & FLAG_CODED_PTS) put_v(bc, coded_pts);
1148
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✓ Branch 1 taken 29 times.
4872 if (flags & FLAG_SIZE_MSB ) put_v(bc, data_size / fc->size_mul);
1149
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4872 if (flags & FLAG_HEADER_IDX) put_v(bc, header_idx = best_header_idx);
1150
1151
2/2
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4872 if (flags & FLAG_CHECKSUM) avio_wl32(bc, ffio_get_checksum(bc));
1152 1358 else ffio_get_checksum(bc);
1153
1154
2/2
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✓ Branch 1 taken 4870 times.
4872 if (flags & FLAG_SM_DATA) {
1155 2 avio_write(bc, sm_buf, sm_size);
1156 }
1157 4872 avio_write(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]);
1158
1159 4872 nus->last_flags = flags;
1160 4872 nus->last_pts = pkt->pts;
1161
1162 //FIXME just store one per syncpoint
1163
4/4
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✓ Branch 2 taken 4743 times.
✓ Branch 3 taken 4 times.
4872 if (flags & FLAG_KEY && !(nut->flags & NUT_PIPE)) {
1164 4743 av_add_index_entry(
1165 4743 s->streams[pkt->stream_index],
1166 nut->last_syncpoint_pos,
1167 pkt->pts,
1168 0,
1169 0,
1170 AVINDEX_KEYFRAME);
1171
3/4
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4743 if (nus->keyframe_pts && nus->keyframe_pts[nut->sp_count] == AV_NOPTS_VALUE)
1172 4429 nus->keyframe_pts[nut->sp_count] = pkt->pts;
1173 }
1174
1175
4/4
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4872 if (!nut->max_pts_tb || av_compare_ts(nut->max_pts, *nut->max_pts_tb, pkt->pts, *nus->time_base) < 0) {
1176 4861 nut->max_pts = pkt->pts;
1177 4861 nut->max_pts_tb = nus->time_base;
1178 }
1179
1180 11 fail:
1181 4872 av_freep(&sm_buf);
1182
1183 4872 return ret;
1184 }
1185
1186 2373 static int nut_write_trailer(AVFormatContext *s)
1187 {
1188 2373 NUTContext *nut = s->priv_data;
1189 2373 AVIOContext *bc = s->pb, *dyn_bc;
1190 int ret;
1191
1192
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2373 while (nut->header_count < 3)
1193 write_headers(s, bc);
1194
1195
1/2
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2373 if (!nut->sp_count)
1196 return 0;
1197
1198 2373 ret = avio_open_dyn_buf(&dyn_bc);
1199
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✗ Branch 1 not taken.
2373 if (ret >= 0) {
1200 av_assert1(nut->write_index); // sp_count should be 0 if no index is going to be written
1201 2373 write_index(nut, dyn_bc);
1202 2373 put_packet(nut, bc, dyn_bc, INDEX_STARTCODE);
1203 2373 ffio_free_dyn_buf(&dyn_bc);
1204 }
1205
1206 2373 return 0;
1207 }
1208
1209 2373 static void nut_write_deinit(AVFormatContext *s)
1210 {
1211 2373 NUTContext *nut = s->priv_data;
1212 int i;
1213
1214 2373 ff_nut_free_sp(nut);
1215
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2373 if (nut->stream)
1216
2/2
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4750 for (i=0; i<s->nb_streams; i++)
1217 2377 av_freep(&nut->stream[i].keyframe_pts);
1218
1219 2373 av_freep(&nut->stream);
1220 2373 av_freep(&nut->chapter);
1221 2373 av_freep(&nut->time_base);
1222 2373 }
1223
1224 #define OFFSET(x) offsetof(NUTContext, x)
1225 #define E AV_OPT_FLAG_ENCODING_PARAM
1226 static const AVOption options[] = {
1227 { "syncpoints", "NUT syncpoint behaviour", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, E, .unit = "syncpoints" },
1228 { "default", "", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, E, .unit = "syncpoints" },
1229 { "none", "Disable syncpoints, low overhead and unseekable", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE}, INT_MIN, INT_MAX, E, .unit = "syncpoints" },
1230 { "timestamped", "Extend syncpoints with a wallclock timestamp", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, .unit = "syncpoints" },
1231 { "write_index", "Write index", OFFSET(write_index), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E, },
1232 { NULL },
1233 };
1234
1235 static const AVClass class = {
1236 .class_name = "nutenc",
1237 .item_name = av_default_item_name,
1238 .option = options,
1239 .version = LIBAVUTIL_VERSION_INT,
1240 };
1241
1242 const FFOutputFormat ff_nut_muxer = {
1243 .p.name = "nut",
1244 .p.long_name = NULL_IF_CONFIG_SMALL("NUT"),
1245 .p.mime_type = "video/x-nut",
1246 .p.extensions = "nut",
1247 .priv_data_size = sizeof(NUTContext),
1248 .p.audio_codec = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS :
1249 CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
1250 .p.video_codec = AV_CODEC_ID_MPEG4,
1251 .write_header = nut_write_header,
1252 .write_packet = nut_write_packet,
1253 .write_trailer = nut_write_trailer,
1254 .deinit = nut_write_deinit,
1255 .p.flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
1256 .p.codec_tag = ff_nut_codec_tags,
1257 .p.priv_class = &class,
1258 };
1259