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/tree.h" 27#include "libavutil/dict.h" 28#include "libavutil/avassert.h" 29#include "libavutil/time.h" 30#include "libavutil/opt.h" 31#include "libavcodec/bytestream.h" 32#include "libavcodec/mpegaudiodata.h" 33#include "mux.h" 34#include "nut.h" 35#include "internal.h" 36#include "avio_internal.h" 37#include "riff.h" 38#include "version.h" 39 40/** 41 * Chooses a timebase for muxing the specified stream. 42 * 43 * The chosen timebase allows sample accurate timestamps based 44 * on the framerate or sample rate for audio streams. It also is 45 * at least as precise as 1/min_precision would be. 46 */ 47static AVRational choose_timebase(AVFormatContext *s, AVStream *st, int min_precision) 48{ 49 AVRational q = st->time_base; 50 51 for (int j = 2; j < 14; j += 1 + (j > 2)) 52 while (q.den / q.num < min_precision && q.num % j == 0) 53 q.num /= j; 54 while (q.den / q.num < min_precision && q.den < (1<<24)) 55 q.den <<= 1; 56 57 return q; 58} 59 60static int find_expected_header(AVCodecParameters *p, int size, int key_frame, 61 uint8_t out[64]) 62{ 63 int sample_rate = p->sample_rate; 64 65 if (size > 4096) 66 return 0; 67 68 AV_WB24(out, 1); 69 70 if (p->codec_id == AV_CODEC_ID_MPEG4) { 71 if (key_frame) { 72 return 3; 73 } else { 74 out[3] = 0xB6; 75 return 4; 76 } 77 } else if (p->codec_id == AV_CODEC_ID_MPEG1VIDEO || 78 p->codec_id == AV_CODEC_ID_MPEG2VIDEO) { 79 return 3; 80 } else if (p->codec_id == AV_CODEC_ID_H264) { 81 return 3; 82 } else if (p->codec_id == AV_CODEC_ID_MP3 || 83 p->codec_id == AV_CODEC_ID_MP2) { 84 int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size; 85 int layer = p->codec_id == AV_CODEC_ID_MP3 ? 3 : 2; 86 unsigned int header = 0xFFF00000; 87 88 lsf = sample_rate < (24000 + 32000) / 2; 89 mpeg25 = sample_rate < (12000 + 16000) / 2; 90 sample_rate <<= lsf + mpeg25; 91 if (sample_rate < (32000 + 44100) / 2) sample_rate_index = 2; 92 else if (sample_rate < (44100 + 48000) / 2) sample_rate_index = 0; 93 else sample_rate_index = 1; 94 95 sample_rate = ff_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25); 96 97 for (bitrate_index = 2; bitrate_index < 30; bitrate_index++) { 98 frame_size = 99 ff_mpa_bitrate_tab[lsf][layer - 1][bitrate_index >> 1]; 100 frame_size = (frame_size * 144000) / (sample_rate << lsf) + 101 (bitrate_index & 1); 102 103 if (frame_size == size) 104 break; 105 } 106 107 header |= (!lsf) << 19; 108 header |= (4 - layer) << 17; 109 header |= 1 << 16; //no crc 110 AV_WB32(out, header); 111 if (size <= 0) 112 return 2; //we guess there is no crc, if there is one the user clearly does not care about overhead 113 if (bitrate_index == 30) 114 return -1; //something is wrong ... 115 116 header |= (bitrate_index >> 1) << 12; 117 header |= sample_rate_index << 10; 118 header |= (bitrate_index & 1) << 9; 119 120 return 2; //FIXME actually put the needed ones in build_elision_headers() 121 //return 3; //we guess that the private bit is not set 122//FIXME the above assumptions should be checked, if these turn out false too often something should be done 123 } 124 return 0; 125} 126 127static int find_header_idx(AVFormatContext *s, AVCodecParameters *p, int size, 128 int frame_type) 129{ 130 NUTContext *nut = s->priv_data; 131 uint8_t out[64]; 132 int i; 133 int len = find_expected_header(p, size, frame_type, out); 134 135 for (i = 1; i < nut->header_count; i++) { 136 if (len == nut->header_len[i] && !memcmp(out, nut->header[i], len)) { 137 return i; 138 } 139 } 140 141 return 0; 142} 143 144static void build_elision_headers(AVFormatContext *s) 145{ 146 NUTContext *nut = s->priv_data; 147 int i; 148 //FIXME this is lame 149 //FIXME write a 2pass mode to find the maximal headers 150 static const uint8_t headers[][5] = { 151 { 3, 0x00, 0x00, 0x01 }, 152 { 4, 0x00, 0x00, 0x01, 0xB6}, 153 { 2, 0xFF, 0xFA }, //mp3+crc 154 { 2, 0xFF, 0xFB }, //mp3 155 { 2, 0xFF, 0xFC }, //mp2+crc 156 { 2, 0xFF, 0xFD }, //mp2 157 }; 158 159 nut->header_count = 7; 160 for (i = 1; i < nut->header_count; i++) { 161 nut->header_len[i] = headers[i - 1][0]; 162 nut->header[i] = &headers[i - 1][1]; 163 } 164} 165 166static void build_frame_code(AVFormatContext *s) 167{ 168 NUTContext *nut = s->priv_data; 169 int key_frame, index, pred, stream_id; 170 int start = 1; 171 int end = 254; 172 int keyframe_0_esc = s->nb_streams > 2; 173 int pred_table[10]; 174 FrameCode *ft; 175 176 ft = &nut->frame_code[start]; 177 ft->flags = FLAG_CODED; 178 ft->size_mul = 1; 179 ft->pts_delta = 1; 180 start++; 181 182 if (keyframe_0_esc) { 183 /* keyframe = 0 escape */ 184 FrameCode *ft = &nut->frame_code[start]; 185 ft->flags = FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS; 186 ft->size_mul = 1; 187 start++; 188 } 189 190 for (stream_id = 0; stream_id < s->nb_streams; stream_id++) { 191 int start2 = start + (end - start) * stream_id / s->nb_streams; 192 int end2 = start + (end - start) * (stream_id + 1) / s->nb_streams; 193 AVCodecParameters *par = s->streams[stream_id]->codecpar; 194 int is_audio = par->codec_type == AVMEDIA_TYPE_AUDIO; 195 int intra_only = /*codec->intra_only || */ is_audio; 196 int pred_count; 197 int frame_size = 0; 198 199 if (par->codec_type == AVMEDIA_TYPE_AUDIO) { 200 frame_size = av_get_audio_frame_duration2(par, 0); 201 if (par->codec_id == AV_CODEC_ID_VORBIS && !frame_size) 202 frame_size = 64; 203 } else { 204 AVRational f = av_div_q(av_inv_q(s->streams[stream_id]->avg_frame_rate), *nut->stream[stream_id].time_base); 205 if (f.den == 1 && f.num>0) 206 frame_size = f.num; 207 } 208 if (!frame_size) 209 frame_size = 1; 210 211 for (key_frame = 0; key_frame < 2; key_frame++) { 212 if (!intra_only || !keyframe_0_esc || key_frame != 0) { 213 FrameCode *ft = &nut->frame_code[start2]; 214 ft->flags = FLAG_KEY * key_frame; 215 ft->flags |= FLAG_SIZE_MSB | FLAG_CODED_PTS; 216 ft->stream_id = stream_id; 217 ft->size_mul = 1; 218 if (is_audio) 219 ft->header_idx = find_header_idx(s, par, -1, key_frame); 220 start2++; 221 } 222 } 223 224 key_frame = intra_only; 225#if 1 226 if (is_audio) { 227 int frame_bytes; 228 int pts; 229 230 if (par->block_align > 0) { 231 frame_bytes = par->block_align; 232 } else { 233 int frame_size = av_get_audio_frame_duration2(par, 0); 234 frame_bytes = frame_size * (int64_t)par->bit_rate / (8 * par->sample_rate); 235 } 236 237 for (pts = 0; pts < 2; pts++) { 238 for (pred = 0; pred < 2; pred++) { 239 FrameCode *ft = &nut->frame_code[start2]; 240 ft->flags = FLAG_KEY * key_frame; 241 ft->stream_id = stream_id; 242 ft->size_mul = frame_bytes + 2; 243 ft->size_lsb = frame_bytes + pred; 244 ft->pts_delta = pts * frame_size; 245 ft->header_idx = find_header_idx(s, par, frame_bytes + pred, key_frame); 246 start2++; 247 } 248 } 249 } else { 250 FrameCode *ft = &nut->frame_code[start2]; 251 ft->flags = FLAG_KEY | FLAG_SIZE_MSB; 252 ft->stream_id = stream_id; 253 ft->size_mul = 1; 254 ft->pts_delta = frame_size; 255 start2++; 256 } 257#endif 258 259 if (par->video_delay) { 260 pred_count = 5; 261 pred_table[0] = -2; 262 pred_table[1] = -1; 263 pred_table[2] = 1; 264 pred_table[3] = 3; 265 pred_table[4] = 4; 266 } else if (par->codec_id == AV_CODEC_ID_VORBIS) { 267 pred_count = 3; 268 pred_table[0] = 2; 269 pred_table[1] = 9; 270 pred_table[2] = 16; 271 } else { 272 pred_count = 1; 273 pred_table[0] = 1; 274 } 275 276 for (pred = 0; pred < pred_count; pred++) { 277 int start3 = start2 + (end2 - start2) * pred / pred_count; 278 int end3 = start2 + (end2 - start2) * (pred + 1) / pred_count; 279 280 pred_table[pred] *= frame_size; 281 282 for (index = start3; index < end3; index++) { 283 FrameCode *ft = &nut->frame_code[index]; 284 ft->flags = FLAG_KEY * key_frame; 285 ft->flags |= FLAG_SIZE_MSB; 286 ft->stream_id = stream_id; 287//FIXME use single byte size and pred from last 288 ft->size_mul = end3 - start3; 289 ft->size_lsb = index - start3; 290 ft->pts_delta = pred_table[pred]; 291 if (is_audio) 292 ft->header_idx = find_header_idx(s, par, -1, key_frame); 293 } 294 } 295 } 296 memmove(&nut->frame_code['N' + 1], &nut->frame_code['N'], sizeof(FrameCode) * (255 - 'N')); 297 nut->frame_code[0].flags = 298 nut->frame_code[255].flags = 299 nut->frame_code['N'].flags = FLAG_INVALID; 300} 301 302/** 303 * Get the length in bytes which is needed to store val as v. 304 */ 305static int get_v_length(uint64_t val) 306{ 307 int i = 1; 308 309 while (val >>= 7) 310 i++; 311 312 return i; 313} 314 315/** 316 * Put val using a variable number of bytes. 317 */ 318static void put_v(AVIOContext *bc, uint64_t val) 319{ 320 int i = get_v_length(val); 321 322 while (--i > 0) 323 avio_w8(bc, 128 | (uint8_t)(val >> (7*i))); 324 325 avio_w8(bc, val & 127); 326} 327 328static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val) 329{ 330 val *= nut->time_base_count; 331 val += time_base - nut->time_base; 332 put_v(bc, val); 333} 334/** 335 * Store a string as vb. 336 */ 337static void put_str(AVIOContext *bc, const char *string) 338{ 339 size_t len = strlen(string); 340 341 put_v(bc, len); 342 avio_write(bc, string, len); 343} 344 345static void put_s(AVIOContext *bc, int64_t val) 346{ 347 put_v(bc, 2 * FFABS(val) - (val > 0)); 348} 349 350static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc, 351 uint64_t startcode) 352{ 353 uint8_t *dyn_buf = NULL; 354 int dyn_size = avio_get_dyn_buf(dyn_bc, &dyn_buf); 355 int forw_ptr = dyn_size + 4; 356 357 if (forw_ptr > 4096) 358 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); 359 avio_wb64(bc, startcode); 360 put_v(bc, forw_ptr); 361 if (forw_ptr > 4096) 362 avio_wl32(bc, ffio_get_checksum(bc)); 363 364 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); 365 avio_write(bc, dyn_buf, dyn_size); 366 avio_wl32(bc, ffio_get_checksum(bc)); 367 368 ffio_reset_dyn_buf(dyn_bc); 369} 370 371static void write_mainheader(NUTContext *nut, AVIOContext *bc) 372{ 373 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields, 374 tmp_head_idx; 375 int64_t tmp_match; 376 377 put_v(bc, nut->version); 378 if (nut->version > 3) 379 put_v(bc, nut->minor_version = 1); 380 put_v(bc, nut->avf->nb_streams); 381 put_v(bc, nut->max_distance); 382 put_v(bc, nut->time_base_count); 383 384 for (i = 0; i < nut->time_base_count; i++) { 385 put_v(bc, nut->time_base[i].num); 386 put_v(bc, nut->time_base[i].den); 387 } 388 389 tmp_pts = 0; 390 tmp_mul = 1; 391 tmp_stream = 0; 392 tmp_match = 1 - (1LL << 62); 393 tmp_head_idx = 0; 394 for (i = 0; i < 256; ) { 395 tmp_fields = 0; 396 tmp_size = 0; 397// tmp_res=0; 398 if (tmp_pts != nut->frame_code[i].pts_delta ) tmp_fields = 1; 399 if (tmp_mul != nut->frame_code[i].size_mul ) tmp_fields = 2; 400 if (tmp_stream != nut->frame_code[i].stream_id ) tmp_fields = 3; 401 if (tmp_size != nut->frame_code[i].size_lsb ) tmp_fields = 4; 402// if (tmp_res != nut->frame_code[i].res ) tmp_fields=5; 403 if (tmp_head_idx != nut->frame_code[i].header_idx) tmp_fields = 8; 404 405 tmp_pts = nut->frame_code[i].pts_delta; 406 tmp_flags = nut->frame_code[i].flags; 407 tmp_stream = nut->frame_code[i].stream_id; 408 tmp_mul = nut->frame_code[i].size_mul; 409 tmp_size = nut->frame_code[i].size_lsb; 410// tmp_res = nut->frame_code[i].res; 411 tmp_head_idx = nut->frame_code[i].header_idx; 412 413 for (j = 0; i < 256; j++, i++) { 414 if (i == 'N') { 415 j--; 416 continue; 417 } 418 if (nut->frame_code[i].pts_delta != tmp_pts || 419 nut->frame_code[i].flags != tmp_flags || 420 nut->frame_code[i].stream_id != tmp_stream || 421 nut->frame_code[i].size_mul != tmp_mul || 422 nut->frame_code[i].size_lsb != tmp_size + j || 423// nut->frame_code[i].res != tmp_res || 424 nut->frame_code[i].header_idx != tmp_head_idx) 425 break; 426 } 427 if (j != tmp_mul - tmp_size) 428 tmp_fields = 6; 429 430 put_v(bc, tmp_flags); 431 put_v(bc, tmp_fields); 432 if (tmp_fields > 0) put_s(bc, tmp_pts); 433 if (tmp_fields > 1) put_v(bc, tmp_mul); 434 if (tmp_fields > 2) put_v(bc, tmp_stream); 435 if (tmp_fields > 3) put_v(bc, tmp_size); 436 if (tmp_fields > 4) put_v(bc, 0 /*tmp_res*/); 437 if (tmp_fields > 5) put_v(bc, j); 438 if (tmp_fields > 6) put_v(bc, tmp_match); 439 if (tmp_fields > 7) put_v(bc, tmp_head_idx); 440 } 441 put_v(bc, nut->header_count - 1); 442 for (i = 1; i < nut->header_count; i++) { 443 put_v(bc, nut->header_len[i]); 444 avio_write(bc, nut->header[i], nut->header_len[i]); 445 } 446 // flags had been effectively introduced in version 4 447 if (nut->version > 3) 448 put_v(bc, nut->flags); 449} 450 451static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc, 452 AVStream *st, int i) 453{ 454 NUTContext *nut = avctx->priv_data; 455 AVCodecParameters *par = st->codecpar; 456 457 put_v(bc, i); 458 switch (par->codec_type) { 459 case AVMEDIA_TYPE_VIDEO: put_v(bc, 0); break; 460 case AVMEDIA_TYPE_AUDIO: put_v(bc, 1); break; 461 case AVMEDIA_TYPE_SUBTITLE: put_v(bc, 2); break; 462 default: put_v(bc, 3); break; 463 } 464 put_v(bc, 4); 465 466 if (par->codec_tag) { 467 avio_wl32(bc, par->codec_tag); 468 } else { 469 av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i); 470 return AVERROR(EINVAL); 471 } 472 473 put_v(bc, nut->stream[i].time_base - nut->time_base); 474 put_v(bc, nut->stream[i].msb_pts_shift); 475 put_v(bc, nut->stream[i].max_pts_distance); 476 put_v(bc, par->video_delay); 477 avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */ 478 479 put_v(bc, par->extradata_size); 480 avio_write(bc, par->extradata, par->extradata_size); 481 482 switch (par->codec_type) { 483 case AVMEDIA_TYPE_AUDIO: 484 put_v(bc, par->sample_rate); 485 put_v(bc, 1); 486 put_v(bc, par->ch_layout.nb_channels); 487 break; 488 case AVMEDIA_TYPE_VIDEO: 489 put_v(bc, par->width); 490 put_v(bc, par->height); 491 492 if (st->sample_aspect_ratio.num <= 0 || 493 st->sample_aspect_ratio.den <= 0) { 494 put_v(bc, 0); 495 put_v(bc, 0); 496 } else { 497 put_v(bc, st->sample_aspect_ratio.num); 498 put_v(bc, st->sample_aspect_ratio.den); 499 } 500 put_v(bc, 0); /* csp type -- unknown */ 501 break; 502 default: 503 break; 504 } 505 return 0; 506} 507 508static int add_info(AVIOContext *bc, const char *type, const char *value) 509{ 510 put_str(bc, type); 511 put_s(bc, -1); 512 put_str(bc, value); 513 return 1; 514} 515 516static int write_globalinfo(NUTContext *nut, AVIOContext *bc) 517{ 518 AVFormatContext *s = nut->avf; 519 AVDictionaryEntry *t = NULL; 520 AVIOContext *dyn_bc; 521 uint8_t *dyn_buf = NULL; 522 int count = 0, dyn_size; 523 int ret = avio_open_dyn_buf(&dyn_bc); 524 if (ret < 0) 525 return ret; 526 527 ff_standardize_creation_time(s); 528 while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) 529 count += add_info(dyn_bc, t->key, t->value); 530 531 put_v(bc, 0); //stream_if_plus1 532 put_v(bc, 0); //chapter_id 533 put_v(bc, 0); //timestamp_start 534 put_v(bc, 0); //length 535 536 put_v(bc, count); 537 538 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); 539 avio_write(bc, dyn_buf, dyn_size); 540 av_free(dyn_buf); 541 return 0; 542} 543 544static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) { 545 AVFormatContext *s= nut->avf; 546 AVStream* st = s->streams[stream_id]; 547 AVDictionaryEntry *t = NULL; 548 AVIOContext *dyn_bc; 549 uint8_t *dyn_buf=NULL; 550 int count=0, dyn_size, i; 551 int ret = avio_open_dyn_buf(&dyn_bc); 552 if (ret < 0) 553 return ret; 554 555 while ((t = av_dict_get(st->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) 556 count += add_info(dyn_bc, t->key, t->value); 557 for (i=0; ff_nut_dispositions[i].flag; ++i) { 558 if (st->disposition & ff_nut_dispositions[i].flag) 559 count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str); 560 } 561 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { 562 uint8_t buf[256]; 563 if (st->r_frame_rate.num>0 && st->r_frame_rate.den>0) 564 snprintf(buf, sizeof(buf), "%d/%d", st->r_frame_rate.num, st->r_frame_rate.den); 565 else 566 snprintf(buf, sizeof(buf), "%d/%d", st->avg_frame_rate.num, st->avg_frame_rate.den); 567 count += add_info(dyn_bc, "r_frame_rate", buf); 568 } 569 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); 570 571 if (count) { 572 put_v(bc, stream_id + 1); //stream_id_plus1 573 put_v(bc, 0); //chapter_id 574 put_v(bc, 0); //timestamp_start 575 put_v(bc, 0); //length 576 577 put_v(bc, count); 578 579 avio_write(bc, dyn_buf, dyn_size); 580 } 581 582 av_free(dyn_buf); 583 return count; 584} 585 586static int write_chapter(NUTContext *nut, AVIOContext *bc, int id) 587{ 588 AVIOContext *dyn_bc; 589 uint8_t *dyn_buf = NULL; 590 AVDictionaryEntry *t = NULL; 591 AVChapter *ch = nut->avf->chapters[id]; 592 int ret, dyn_size, count = 0; 593 594 ret = avio_open_dyn_buf(&dyn_bc); 595 if (ret < 0) 596 return ret; 597 598 put_v(bc, 0); // stream_id_plus1 599 put_s(bc, id + 1); // chapter_id 600 put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start 601 put_v(bc, ch->end - ch->start); // chapter_len 602 603 while ((t = av_dict_get(ch->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) 604 count += add_info(dyn_bc, t->key, t->value); 605 606 put_v(bc, count); 607 608 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); 609 avio_write(bc, dyn_buf, dyn_size); 610 av_freep(&dyn_buf); 611 return 0; 612} 613 614static int write_index(NUTContext *nut, AVIOContext *bc) { 615 int i; 616 Syncpoint dummy= { .pos= 0 }; 617 Syncpoint *next_node[2] = { NULL }; 618 int64_t startpos = avio_tell(bc); 619 int64_t payload_size; 620 621 put_tt(nut, nut->max_pts_tb, bc, nut->max_pts); 622 623 put_v(bc, nut->sp_count); 624 625 for (i=0; i<nut->sp_count; i++) { 626 av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, (void**)next_node); 627 put_v(bc, (next_node[1]->pos >> 4) - (dummy.pos>>4)); 628 dummy.pos = next_node[1]->pos; 629 } 630 631 for (i=0; i<nut->avf->nb_streams; i++) { 632 StreamContext *nus= &nut->stream[i]; 633 int64_t last_pts= -1; 634 int j, k; 635 for (j=0; j<nut->sp_count; j++) { 636 int flag; 637 int n = 0; 638 639 if (j && nus->keyframe_pts[j] == nus->keyframe_pts[j-1]) { 640 av_log(nut->avf, AV_LOG_WARNING, "Multiple keyframes with same PTS\n"); 641 nus->keyframe_pts[j] = AV_NOPTS_VALUE; 642 } 643 644 flag = (nus->keyframe_pts[j] != AV_NOPTS_VALUE) ^ (j+1 == nut->sp_count); 645 for (; j<nut->sp_count && (nus->keyframe_pts[j] != AV_NOPTS_VALUE) == flag; j++) 646 n++; 647 648 put_v(bc, 1 + 2 * flag + 4 * n); 649 for (k= j - n; k<=j && k<nut->sp_count; k++) { 650 if (nus->keyframe_pts[k] == AV_NOPTS_VALUE) 651 continue; 652 av_assert0(nus->keyframe_pts[k] > last_pts); 653 put_v(bc, nus->keyframe_pts[k] - last_pts); 654 last_pts = nus->keyframe_pts[k]; 655 } 656 } 657 } 658 659 payload_size = avio_tell(bc) - startpos + 8 + 4; 660 661 avio_wb64(bc, 8 + payload_size + av_log2(payload_size) / 7 + 1 + 4*(payload_size > 4096)); 662 663 return 0; 664} 665 666static int write_headers(AVFormatContext *avctx, AVIOContext *bc) 667{ 668 NUTContext *nut = avctx->priv_data; 669 AVIOContext *dyn_bc; 670 int i, ret; 671 672 ff_metadata_conv_ctx(avctx, ff_nut_metadata_conv, NULL); 673 674 ret = avio_open_dyn_buf(&dyn_bc); 675 if (ret < 0) 676 return ret; 677 write_mainheader(nut, dyn_bc); 678 put_packet(nut, bc, dyn_bc, MAIN_STARTCODE); 679 680 for (i = 0; i < nut->avf->nb_streams; i++) { 681 ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i); 682 if (ret < 0) { 683 goto fail; 684 } 685 put_packet(nut, bc, dyn_bc, STREAM_STARTCODE); 686 } 687 688 write_globalinfo(nut, dyn_bc); 689 put_packet(nut, bc, dyn_bc, INFO_STARTCODE); 690 691 for (i = 0; i < nut->avf->nb_streams; i++) { 692 ret = write_streaminfo(nut, dyn_bc, i); 693 if (ret > 0) 694 put_packet(nut, bc, dyn_bc, INFO_STARTCODE); 695 else if (ret < 0) { 696 goto fail; 697 } 698 } 699 700 for (i = 0; i < nut->avf->nb_chapters; i++) { 701 ret = write_chapter(nut, dyn_bc, i); 702 if (ret < 0) { 703 goto fail; 704 } 705 put_packet(nut, bc, dyn_bc, INFO_STARTCODE); 706 } 707 708 nut->last_syncpoint_pos = INT_MIN; 709 nut->header_count++; 710 711 ret = 0; 712fail: 713 ffio_free_dyn_buf(&dyn_bc); 714 715 return ret; 716} 717 718static int nut_write_header(AVFormatContext *s) 719{ 720 NUTContext *nut = s->priv_data; 721 AVIOContext *bc = s->pb; 722 int i, j, ret; 723 724 nut->avf = s; 725 726 nut->version = FFMAX(NUT_STABLE_VERSION, 3 + !!nut->flags); 727 if (nut->version > 3 && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { 728 av_log(s, AV_LOG_ERROR, 729 "The additional syncpoint modes require version %d, " 730 "that is currently not finalized, " 731 "please set -f_strict experimental in order to enable it.\n", 732 nut->version); 733 return AVERROR_EXPERIMENTAL; 734 } 735 736 nut->stream = av_calloc(s->nb_streams, sizeof(*nut->stream )); 737 nut->chapter = av_calloc(s->nb_chapters, sizeof(*nut->chapter)); 738 nut->time_base= av_calloc(s->nb_streams + 739 s->nb_chapters, sizeof(*nut->time_base)); 740 if (!nut->stream || !nut->chapter || !nut->time_base) 741 return AVERROR(ENOMEM); 742 743 for (i = 0; i < s->nb_streams; i++) { 744 AVStream *st = s->streams[i]; 745 int ssize; 746 AVRational time_base; 747 ff_parse_specific_params(st, &time_base.den, &ssize, &time_base.num); 748 749 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate) { 750 time_base = (AVRational) {1, st->codecpar->sample_rate}; 751 } else { 752 time_base = choose_timebase(s, st, 48000); 753 } 754 755 avpriv_set_pts_info(st, 64, time_base.num, time_base.den); 756 757 for (j = 0; j < nut->time_base_count; j++) 758 if (!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))) { 759 break; 760 } 761 nut->time_base[j] = time_base; 762 nut->stream[i].time_base = &nut->time_base[j]; 763 if (j == nut->time_base_count) 764 nut->time_base_count++; 765 766 if (INT64_C(1000) * time_base.num >= time_base.den) 767 nut->stream[i].msb_pts_shift = 7; 768 else 769 nut->stream[i].msb_pts_shift = 14; 770 nut->stream[i].max_pts_distance = 771 FFMAX(time_base.den, time_base.num) / time_base.num; 772 } 773 774 for (i = 0; i < s->nb_chapters; i++) { 775 AVChapter *ch = s->chapters[i]; 776 777 for (j = 0; j < nut->time_base_count; j++) 778 if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational))) 779 break; 780 781 nut->time_base[j] = ch->time_base; 782 nut->chapter[i].time_base = &nut->time_base[j]; 783 if (j == nut->time_base_count) 784 nut->time_base_count++; 785 } 786 787 nut->max_distance = MAX_DISTANCE; 788 build_elision_headers(s); 789 build_frame_code(s); 790 av_assert0(nut->frame_code['N'].flags == FLAG_INVALID); 791 792 avio_write(bc, ID_STRING, strlen(ID_STRING)); 793 avio_w8(bc, 0); 794 795 if ((ret = write_headers(s, bc)) < 0) 796 return ret; 797 798 if (s->avoid_negative_ts < 0) 799 s->avoid_negative_ts = 1; 800 801 return 0; 802} 803 804static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc, 805 AVPacket *pkt) 806{ 807 int flags = 0; 808 809 if (pkt->flags & AV_PKT_FLAG_KEY) 810 flags |= FLAG_KEY; 811 if (pkt->stream_index != fc->stream_id) 812 flags |= FLAG_STREAM_ID; 813 if (pkt->size / fc->size_mul) 814 flags |= FLAG_SIZE_MSB; 815 if (pkt->pts - nus->last_pts != fc->pts_delta) 816 flags |= FLAG_CODED_PTS; 817 if (pkt->side_data_elems && nut->version > 3) 818 flags |= FLAG_SM_DATA; 819 if (pkt->size > 2 * nut->max_distance) 820 flags |= FLAG_CHECKSUM; 821 if (FFABS(pkt->pts - nus->last_pts) > nus->max_pts_distance) 822 flags |= FLAG_CHECKSUM; 823 if (fc->header_idx) 824 if (pkt->size < nut->header_len[fc->header_idx] || 825 pkt->size > 4096 || 826 memcmp(pkt->data, nut->header [fc->header_idx], 827 nut->header_len[fc->header_idx])) 828 flags |= FLAG_HEADER_IDX; 829 830 return flags | (fc->flags & FLAG_CODED); 831} 832 833static int find_best_header_idx(NUTContext *nut, AVPacket *pkt) 834{ 835 int i; 836 int best_i = 0; 837 int best_len = 0; 838 839 if (pkt->size > 4096) 840 return 0; 841 842 for (i = 1; i < nut->header_count; i++) 843 if (pkt->size >= nut->header_len[i] 844 && nut->header_len[i] > best_len 845 && !memcmp(pkt->data, nut->header[i], nut->header_len[i])) { 846 best_i = i; 847 best_len = nut->header_len[i]; 848 } 849 return best_i; 850} 851 852static int write_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta) 853{ 854 int ret, i, dyn_size; 855 unsigned flags; 856 AVIOContext *dyn_bc; 857 int sm_data_count = 0; 858 uint8_t tmp[256]; 859 uint8_t *dyn_buf; 860 861 ret = avio_open_dyn_buf(&dyn_bc); 862 if (ret < 0) 863 return ret; 864 865 for (i = 0; i<pkt->side_data_elems; i++) { 866 const uint8_t *data = pkt->side_data[i].data; 867 int size = pkt->side_data[i].size; 868 const uint8_t *data_end = data + size; 869 870 if (is_meta) { 871 if ( pkt->side_data[i].type == AV_PKT_DATA_METADATA_UPDATE 872 || pkt->side_data[i].type == AV_PKT_DATA_STRINGS_METADATA) { 873 if (!size || data[size-1]) { 874 ret = AVERROR(EINVAL); 875 goto fail; 876 } 877 while (data < data_end) { 878 const uint8_t *key = data; 879 const uint8_t *val = data + strlen(key) + 1; 880 881 if(val >= data_end) { 882 ret = AVERROR(EINVAL); 883 goto fail; 884 } 885 put_str(dyn_bc, key); 886 put_s(dyn_bc, -1); 887 put_str(dyn_bc, val); 888 data = val + strlen(val) + 1; 889 sm_data_count++; 890 } 891 } 892 } else { 893 switch (pkt->side_data[i].type) { 894 case AV_PKT_DATA_PALETTE: 895 case AV_PKT_DATA_NEW_EXTRADATA: 896 case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: 897 default: 898 if (pkt->side_data[i].type == AV_PKT_DATA_PALETTE) { 899 put_str(dyn_bc, "Palette"); 900 } else if(pkt->side_data[i].type == AV_PKT_DATA_NEW_EXTRADATA) { 901 put_str(dyn_bc, "Extradata"); 902 } else if(pkt->side_data[i].type == AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL) { 903 snprintf(tmp, sizeof(tmp), "CodecSpecificSide%"PRId64"", AV_RB64(data)); 904 put_str(dyn_bc, tmp); 905 } else { 906 snprintf(tmp, sizeof(tmp), "UserData%s-SD-%d", 907 (s->flags & AVFMT_FLAG_BITEXACT) ? "Lavf" : LIBAVFORMAT_IDENT, 908 pkt->side_data[i].type); 909 put_str(dyn_bc, tmp); 910 } 911 put_s(dyn_bc, -2); 912 put_str(dyn_bc, "bin"); 913 put_v(dyn_bc, pkt->side_data[i].size); 914 avio_write(dyn_bc, data, pkt->side_data[i].size); 915 sm_data_count++; 916 break; 917 case AV_PKT_DATA_PARAM_CHANGE: 918 flags = bytestream_get_le32(&data); 919#if FF_API_OLD_CHANNEL_LAYOUT 920 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) { 921 put_str(dyn_bc, "Channels"); 922 put_s(dyn_bc, bytestream_get_le32(&data)); 923 sm_data_count++; 924 } 925 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) { 926 put_str(dyn_bc, "ChannelLayout"); 927 put_s(dyn_bc, -2); 928 put_str(dyn_bc, "u64"); 929 put_v(dyn_bc, 8); 930 avio_write(dyn_bc, data, 8); data+=8; 931 sm_data_count++; 932 } 933#endif 934 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) { 935 put_str(dyn_bc, "SampleRate"); 936 put_s(dyn_bc, bytestream_get_le32(&data)); 937 sm_data_count++; 938 } 939 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) { 940 put_str(dyn_bc, "Width"); 941 put_s(dyn_bc, bytestream_get_le32(&data)); 942 put_str(dyn_bc, "Height"); 943 put_s(dyn_bc, bytestream_get_le32(&data)); 944 sm_data_count+=2; 945 } 946 break; 947 case AV_PKT_DATA_SKIP_SAMPLES: 948 if (AV_RL32(data)) { 949 put_str(dyn_bc, "SkipStart"); 950 put_s(dyn_bc, (unsigned)AV_RL32(data)); 951 sm_data_count++; 952 } 953 if (AV_RL32(data+4)) { 954 put_str(dyn_bc, "SkipEnd"); 955 put_s(dyn_bc, (unsigned)AV_RL32(data+4)); 956 sm_data_count++; 957 } 958 break; 959 case AV_PKT_DATA_METADATA_UPDATE: 960 case AV_PKT_DATA_STRINGS_METADATA: 961 case AV_PKT_DATA_QUALITY_STATS: 962 // belongs into meta, not side data 963 break; 964 } 965 } 966 } 967 968fail: 969 put_v(bc, sm_data_count); 970 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); 971 avio_write(bc, dyn_buf, dyn_size); 972 av_freep(&dyn_buf); 973 974 return ret; 975} 976 977static int nut_write_packet(AVFormatContext *s, AVPacket *pkt) 978{ 979 NUTContext *nut = s->priv_data; 980 StreamContext *nus = &nut->stream[pkt->stream_index]; 981 AVIOContext *bc = s->pb, *dyn_bc, *sm_bc = NULL; 982 FrameCode *fc; 983 int64_t coded_pts; 984 int best_length, frame_code, flags, needed_flags, i, header_idx; 985 int best_header_idx; 986 int key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY); 987 int store_sp = 0; 988 int ret = 0; 989 int sm_size = 0; 990 int data_size = pkt->size; 991 uint8_t *sm_buf = NULL; 992 993 if (pkt->pts < 0) { 994 av_log(s, AV_LOG_ERROR, 995 "Negative pts not supported stream %d, pts %"PRId64"\n", 996 pkt->stream_index, pkt->pts); 997 if (pkt->pts == AV_NOPTS_VALUE) 998 av_log(s, AV_LOG_ERROR, "Try to enable the genpts flag\n"); 999 return AVERROR(EINVAL); 1000 } 1001 1002 if (pkt->side_data_elems && nut->version > 3) { 1003 ret = avio_open_dyn_buf(&sm_bc); 1004 if (ret < 0) 1005 return ret; 1006 ret = write_sm_data(s, sm_bc, pkt, 0); 1007 if (ret >= 0) 1008 ret = write_sm_data(s, sm_bc, pkt, 1); 1009 sm_size = avio_close_dyn_buf(sm_bc, &sm_buf); 1010 if (ret < 0) 1011 goto fail; 1012 data_size += sm_size; 1013 } 1014 1015 if (1LL << (20 + 3 * nut->header_count) <= avio_tell(bc)) 1016 write_headers(s, bc); 1017 1018 if (key_frame && !(nus->last_flags & FLAG_KEY)) 1019 store_sp = 1; 1020 1021 if (data_size + 30 /*FIXME check*/ + avio_tell(bc) >= nut->last_syncpoint_pos + nut->max_distance) 1022 store_sp = 1; 1023 1024//FIXME: Ensure store_sp is 1 in the first place. 1025 1026 if (store_sp && 1027 (!(nut->flags & NUT_PIPE) || nut->last_syncpoint_pos == INT_MIN)) { 1028 int64_t sp_pos = INT64_MAX; 1029 1030 ff_nut_reset_ts(nut, *nus->time_base, pkt->dts); 1031 for (i = 0; i < s->nb_streams; i++) { 1032 AVStream *st = s->streams[i]; 1033 FFStream *const sti = ffstream(st); 1034 int64_t dts_tb = av_rescale_rnd(pkt->dts, 1035 nus->time_base->num * (int64_t)nut->stream[i].time_base->den, 1036 nus->time_base->den * (int64_t)nut->stream[i].time_base->num, 1037 AV_ROUND_DOWN); 1038 int index = av_index_search_timestamp(st, dts_tb, 1039 AVSEEK_FLAG_BACKWARD); 1040 if (index >= 0) { 1041 sp_pos = FFMIN(sp_pos, sti->index_entries[index].pos); 1042 if (!nut->write_index && 2*index > sti->nb_index_entries) { 1043 memmove(sti->index_entries, 1044 sti->index_entries + index, 1045 sizeof(*sti->index_entries) * (sti->nb_index_entries - index)); 1046 sti->nb_index_entries -= index; 1047 } 1048 } 1049 } 1050 1051 nut->last_syncpoint_pos = avio_tell(bc); 1052 ret = avio_open_dyn_buf(&dyn_bc); 1053 if (ret < 0) 1054 goto fail; 1055 put_tt(nut, nus->time_base, dyn_bc, pkt->dts); 1056 put_v(dyn_bc, sp_pos != INT64_MAX ? (nut->last_syncpoint_pos - sp_pos) >> 4 : 0); 1057 1058 if (nut->flags & NUT_BROADCAST) { 1059 put_tt(nut, nus->time_base, dyn_bc, 1060 av_rescale_q(av_gettime(), AV_TIME_BASE_Q, *nus->time_base)); 1061 } 1062 put_packet(nut, bc, dyn_bc, SYNCPOINT_STARTCODE); 1063 ffio_free_dyn_buf(&dyn_bc); 1064 1065 if (nut->write_index) { 1066 if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts)) < 0) 1067 goto fail; 1068 1069 if ((1ll<<60) % nut->sp_count == 0) 1070 for (i=0; i<s->nb_streams; i++) { 1071 int j; 1072 StreamContext *nus = &nut->stream[i]; 1073 av_reallocp_array(&nus->keyframe_pts, 2*nut->sp_count, sizeof(*nus->keyframe_pts)); 1074 if (!nus->keyframe_pts) { 1075 ret = AVERROR(ENOMEM); 1076 goto fail; 1077 } 1078 for (j=nut->sp_count == 1 ? 0 : nut->sp_count; j<2*nut->sp_count; j++) 1079 nus->keyframe_pts[j] = AV_NOPTS_VALUE; 1080 } 1081 } 1082 } 1083 av_assert0(nus->last_pts != AV_NOPTS_VALUE); 1084 1085 coded_pts = pkt->pts & ((1 << nus->msb_pts_shift) - 1); 1086 if (ff_lsb2full(nus, coded_pts) != pkt->pts) 1087 coded_pts = pkt->pts + (1 << nus->msb_pts_shift); 1088 1089 best_header_idx = find_best_header_idx(nut, pkt); 1090 1091 best_length = INT_MAX; 1092 frame_code = -1; 1093 for (i = 0; i < 256; i++) { 1094 int length = 0; 1095 FrameCode *fc = &nut->frame_code[i]; 1096 int flags = fc->flags; 1097 1098 if (flags & FLAG_INVALID) 1099 continue; 1100 needed_flags = get_needed_flags(nut, nus, fc, pkt); 1101 1102 if (flags & FLAG_CODED) { 1103 length++; 1104 flags = needed_flags; 1105 } 1106 1107 if ((flags & needed_flags) != needed_flags) 1108 continue; 1109 1110 if ((flags ^ needed_flags) & FLAG_KEY) 1111 continue; 1112 1113 if (flags & FLAG_STREAM_ID) 1114 length += get_v_length(pkt->stream_index); 1115 1116 if (data_size % fc->size_mul != fc->size_lsb) 1117 continue; 1118 if (flags & FLAG_SIZE_MSB) 1119 length += get_v_length(data_size / fc->size_mul); 1120 1121 if (flags & FLAG_CHECKSUM) 1122 length += 4; 1123 1124 if (flags & FLAG_CODED_PTS) 1125 length += get_v_length(coded_pts); 1126 1127 if ( (flags & FLAG_CODED) 1128 && nut->header_len[best_header_idx] > nut->header_len[fc->header_idx] + 1) { 1129 flags |= FLAG_HEADER_IDX; 1130 } 1131 1132 if (flags & FLAG_HEADER_IDX) { 1133 length += 1 - nut->header_len[best_header_idx]; 1134 } else { 1135 length -= nut->header_len[fc->header_idx]; 1136 } 1137 1138 length *= 4; 1139 length += !(flags & FLAG_CODED_PTS); 1140 length += !(flags & FLAG_CHECKSUM); 1141 1142 if (length < best_length) { 1143 best_length = length; 1144 frame_code = i; 1145 } 1146 } 1147 av_assert0(frame_code != -1); 1148 1149 fc = &nut->frame_code[frame_code]; 1150 flags = fc->flags; 1151 needed_flags = get_needed_flags(nut, nus, fc, pkt); 1152 header_idx = fc->header_idx; 1153 1154 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); 1155 avio_w8(bc, frame_code); 1156 if (flags & FLAG_CODED) { 1157 put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED)); 1158 flags = needed_flags; 1159 } 1160 if (flags & FLAG_STREAM_ID) put_v(bc, pkt->stream_index); 1161 if (flags & FLAG_CODED_PTS) put_v(bc, coded_pts); 1162 if (flags & FLAG_SIZE_MSB ) put_v(bc, data_size / fc->size_mul); 1163 if (flags & FLAG_HEADER_IDX) put_v(bc, header_idx = best_header_idx); 1164 1165 if (flags & FLAG_CHECKSUM) avio_wl32(bc, ffio_get_checksum(bc)); 1166 else ffio_get_checksum(bc); 1167 1168 if (flags & FLAG_SM_DATA) { 1169 avio_write(bc, sm_buf, sm_size); 1170 } 1171 avio_write(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]); 1172 1173 nus->last_flags = flags; 1174 nus->last_pts = pkt->pts; 1175 1176 //FIXME just store one per syncpoint 1177 if (flags & FLAG_KEY && !(nut->flags & NUT_PIPE)) { 1178 av_add_index_entry( 1179 s->streams[pkt->stream_index], 1180 nut->last_syncpoint_pos, 1181 pkt->pts, 1182 0, 1183 0, 1184 AVINDEX_KEYFRAME); 1185 if (nus->keyframe_pts && nus->keyframe_pts[nut->sp_count] == AV_NOPTS_VALUE) 1186 nus->keyframe_pts[nut->sp_count] = pkt->pts; 1187 } 1188 1189 if (!nut->max_pts_tb || av_compare_ts(nut->max_pts, *nut->max_pts_tb, pkt->pts, *nus->time_base) < 0) { 1190 nut->max_pts = pkt->pts; 1191 nut->max_pts_tb = nus->time_base; 1192 } 1193 1194fail: 1195 av_freep(&sm_buf); 1196 1197 return ret; 1198} 1199 1200static int nut_write_trailer(AVFormatContext *s) 1201{ 1202 NUTContext *nut = s->priv_data; 1203 AVIOContext *bc = s->pb, *dyn_bc; 1204 int ret; 1205 1206 while (nut->header_count < 3) 1207 write_headers(s, bc); 1208 1209 if (!nut->sp_count) 1210 return 0; 1211 1212 ret = avio_open_dyn_buf(&dyn_bc); 1213 if (ret >= 0) { 1214 av_assert1(nut->write_index); // sp_count should be 0 if no index is going to be written 1215 write_index(nut, dyn_bc); 1216 put_packet(nut, bc, dyn_bc, INDEX_STARTCODE); 1217 ffio_free_dyn_buf(&dyn_bc); 1218 } 1219 1220 return 0; 1221} 1222 1223static void nut_write_deinit(AVFormatContext *s) 1224{ 1225 NUTContext *nut = s->priv_data; 1226 int i; 1227 1228 ff_nut_free_sp(nut); 1229 if (nut->stream) 1230 for (i=0; i<s->nb_streams; i++) 1231 av_freep(&nut->stream[i].keyframe_pts); 1232 1233 av_freep(&nut->stream); 1234 av_freep(&nut->chapter); 1235 av_freep(&nut->time_base); 1236} 1237 1238#define OFFSET(x) offsetof(NUTContext, x) 1239#define E AV_OPT_FLAG_ENCODING_PARAM 1240static const AVOption options[] = { 1241 { "syncpoints", "NUT syncpoint behaviour", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" }, 1242 { "default", "", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" }, 1243 { "none", "Disable syncpoints, low overhead and unseekable", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE}, INT_MIN, INT_MAX, E, "syncpoints" }, 1244 { "timestamped", "Extend syncpoints with a wallclock timestamp", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, "syncpoints" }, 1245 { "write_index", "Write index", OFFSET(write_index), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E, }, 1246 { NULL }, 1247}; 1248 1249static const AVClass class = { 1250 .class_name = "nutenc", 1251 .item_name = av_default_item_name, 1252 .option = options, 1253 .version = LIBAVUTIL_VERSION_INT, 1254}; 1255 1256const AVOutputFormat ff_nut_muxer = { 1257 .name = "nut", 1258 .long_name = NULL_IF_CONFIG_SMALL("NUT"), 1259 .mime_type = "video/x-nut", 1260 .extensions = "nut", 1261 .priv_data_size = sizeof(NUTContext), 1262 .audio_codec = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS : 1263 CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2, 1264 .video_codec = AV_CODEC_ID_MPEG4, 1265 .write_header = nut_write_header, 1266 .write_packet = nut_write_packet, 1267 .write_trailer = nut_write_trailer, 1268 .deinit = nut_write_deinit, 1269 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS, 1270 .codec_tag = ff_nut_codec_tags, 1271 .priv_class = &class, 1272}; 1273