1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
|
/*
* Live HDS fragmenter
* Copyright (c) 2013 Martin Storsjo
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <float.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "os_support.h"
#include "libavutil/avstring.h"
#include "libavutil/base64.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
typedef struct Fragment {
char file[1024];
int64_t start_time, duration;
int n;
} Fragment;
typedef struct OutputStream {
int bitrate;
int first_stream;
AVFormatContext *ctx;
int ctx_inited;
uint8_t iobuf[32768];
char temp_filename[1024];
int64_t frag_start_ts, last_ts;
AVIOContext *out;
int packets_written;
int nb_fragments, fragments_size, fragment_index;
Fragment **fragments;
int has_audio, has_video;
uint8_t *metadata;
int metadata_size;
uint8_t *extra_packets[2];
int extra_packet_sizes[2];
int nb_extra_packets;
} OutputStream;
typedef struct HDSContext {
const AVClass *class; /* Class for private options. */
int window_size;
int extra_window_size;
int min_frag_duration;
int remove_at_exit;
OutputStream *streams;
int nb_streams;
} HDSContext;
static int parse_header(OutputStream *os, const uint8_t *buf, int buf_size)
{
if (buf_size < 13)
return AVERROR_INVALIDDATA;
if (memcmp(buf, "FLV", 3))
return AVERROR_INVALIDDATA;
buf += 13;
buf_size -= 13;
while (buf_size >= 11 + 4) {
int type = buf[0];
int size = AV_RB24(&buf[1]) + 11 + 4;
if (size > buf_size)
return AVERROR_INVALIDDATA;
if (type == 8 || type == 9) {
if (os->nb_extra_packets >= FF_ARRAY_ELEMS(os->extra_packets))
return AVERROR_INVALIDDATA;
os->extra_packet_sizes[os->nb_extra_packets] = size;
os->extra_packets[os->nb_extra_packets] = av_malloc(size);
if (!os->extra_packets[os->nb_extra_packets])
return AVERROR(ENOMEM);
memcpy(os->extra_packets[os->nb_extra_packets], buf, size);
os->nb_extra_packets++;
} else if (type == 0x12) {
if (os->metadata)
return AVERROR_INVALIDDATA;
os->metadata_size = size - 11 - 4;
os->metadata = av_malloc(os->metadata_size);
if (!os->metadata)
return AVERROR(ENOMEM);
memcpy(os->metadata, buf + 11, os->metadata_size);
}
buf += size;
buf_size -= size;
}
if (!os->metadata)
return AVERROR_INVALIDDATA;
return 0;
}
static int hds_write(void *opaque, uint8_t *buf, int buf_size)
{
OutputStream *os = opaque;
if (os->out) {
avio_write(os->out, buf, buf_size);
} else {
if (!os->metadata_size) {
int ret;
// Assuming the IO buffer is large enough to fit the
// FLV header and all metadata and extradata packets
if ((ret = parse_header(os, buf, buf_size)) < 0)
return ret;
}
}
return buf_size;
}
static void hds_free(AVFormatContext *s)
{
HDSContext *c = s->priv_data;
int i, j;
if (!c->streams)
return;
for (i = 0; i < s->nb_streams; i++) {
OutputStream *os = &c->streams[i];
if (os->out)
ff_format_io_close(s, &os->out);
if (os->ctx && os->ctx_inited)
av_write_trailer(os->ctx);
if (os->ctx)
av_freep(&os->ctx->pb);
if (os->ctx)
avformat_free_context(os->ctx);
av_freep(&os->metadata);
for (j = 0; j < os->nb_extra_packets; j++)
av_freep(&os->extra_packets[j]);
for (j = 0; j < os->nb_fragments; j++)
av_freep(&os->fragments[j]);
av_freep(&os->fragments);
}
av_freep(&c->streams);
}
static int write_manifest(AVFormatContext *s, int final)
{
HDSContext *c = s->priv_data;
AVIOContext *out;
char filename[1024], temp_filename[1024];
int ret, i;
double duration = 0;
if (c->nb_streams > 0)
duration = c->streams[0].last_ts * av_q2d(s->streams[0]->time_base);
snprintf(filename, sizeof(filename), "%s/index.f4m", s->filename);
snprintf(temp_filename, sizeof(temp_filename), "%s/index.f4m.tmp", s->filename);
ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
return ret;
}
avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
avio_printf(out, "<manifest xmlns=\"http://ns.adobe.com/f4m/1.0\">\n");
avio_printf(out, "\t<id>%s</id>\n", av_basename(s->filename));
avio_printf(out, "\t<streamType>%s</streamType>\n",
final ? "recorded" : "live");
avio_printf(out, "\t<deliveryType>streaming</deliveryType>\n");
if (final)
avio_printf(out, "\t<duration>%f</duration>\n", duration);
for (i = 0; i < c->nb_streams; i++) {
OutputStream *os = &c->streams[i];
int b64_size = AV_BASE64_SIZE(os->metadata_size);
char *base64 = av_malloc(b64_size);
if (!base64) {
ff_format_io_close(s, &out);
return AVERROR(ENOMEM);
}
av_base64_encode(base64, b64_size, os->metadata, os->metadata_size);
avio_printf(out, "\t<bootstrapInfo profile=\"named\" url=\"stream%d.abst\" id=\"bootstrap%d\" />\n", i, i);
avio_printf(out, "\t<media bitrate=\"%d\" url=\"stream%d\" bootstrapInfoId=\"bootstrap%d\">\n", os->bitrate/1000, i, i);
avio_printf(out, "\t\t<metadata>%s</metadata>\n", base64);
avio_printf(out, "\t</media>\n");
av_free(base64);
}
avio_printf(out, "</manifest>\n");
avio_flush(out);
ff_format_io_close(s, &out);
return ff_rename(temp_filename, filename, s);
}
static void update_size(AVIOContext *out, int64_t pos)
{
int64_t end = avio_tell(out);
avio_seek(out, pos, SEEK_SET);
avio_wb32(out, end - pos);
avio_seek(out, end, SEEK_SET);
}
/* Note, the .abst files need to be served with the "binary/octet"
* mime type, otherwise at least the OSMF player can easily fail
* with "stream not found" when polling for the next fragment. */
static int write_abst(AVFormatContext *s, OutputStream *os, int final)
{
HDSContext *c = s->priv_data;
AVIOContext *out;
char filename[1024], temp_filename[1024];
int i, ret;
int64_t asrt_pos, afrt_pos;
int start = 0, fragments;
int index = s->streams[os->first_stream]->id;
int64_t cur_media_time = 0;
if (c->window_size)
start = FFMAX(os->nb_fragments - c->window_size, 0);
fragments = os->nb_fragments - start;
if (final)
cur_media_time = os->last_ts;
else if (os->nb_fragments)
cur_media_time = os->fragments[os->nb_fragments - 1]->start_time;
snprintf(filename, sizeof(filename),
"%s/stream%d.abst", s->filename, index);
snprintf(temp_filename, sizeof(temp_filename),
"%s/stream%d.abst.tmp", s->filename, index);
ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
return ret;
}
avio_wb32(out, 0); // abst size
avio_wl32(out, MKTAG('a','b','s','t'));
avio_wb32(out, 0); // version + flags
avio_wb32(out, os->fragment_index - 1); // BootstrapinfoVersion
avio_w8(out, final ? 0 : 0x20); // profile, live, update
avio_wb32(out, 1000); // timescale
avio_wb64(out, cur_media_time);
avio_wb64(out, 0); // SmpteTimeCodeOffset
avio_w8(out, 0); // MovieIdentifer (null string)
avio_w8(out, 0); // ServerEntryCount
avio_w8(out, 0); // QualityEntryCount
avio_w8(out, 0); // DrmData (null string)
avio_w8(out, 0); // MetaData (null string)
avio_w8(out, 1); // SegmentRunTableCount
asrt_pos = avio_tell(out);
avio_wb32(out, 0); // asrt size
avio_wl32(out, MKTAG('a','s','r','t'));
avio_wb32(out, 0); // version + flags
avio_w8(out, 0); // QualityEntryCount
avio_wb32(out, 1); // SegmentRunEntryCount
avio_wb32(out, 1); // FirstSegment
avio_wb32(out, final ? (os->fragment_index - 1) : 0xffffffff); // FragmentsPerSegment
update_size(out, asrt_pos);
avio_w8(out, 1); // FragmentRunTableCount
afrt_pos = avio_tell(out);
avio_wb32(out, 0); // afrt size
avio_wl32(out, MKTAG('a','f','r','t'));
avio_wb32(out, 0); // version + flags
avio_wb32(out, 1000); // timescale
avio_w8(out, 0); // QualityEntryCount
avio_wb32(out, fragments); // FragmentRunEntryCount
for (i = start; i < os->nb_fragments; i++) {
avio_wb32(out, os->fragments[i]->n);
avio_wb64(out, os->fragments[i]->start_time);
avio_wb32(out, os->fragments[i]->duration);
}
update_size(out, afrt_pos);
update_size(out, 0);
ff_format_io_close(s, &out);
return ff_rename(temp_filename, filename, s);
}
static int init_file(AVFormatContext *s, OutputStream *os, int64_t start_ts)
{
int ret, i;
ret = s->io_open(s, &os->out, os->temp_filename, AVIO_FLAG_WRITE, NULL);
if (ret < 0)
return ret;
avio_wb32(os->out, 0);
avio_wl32(os->out, MKTAG('m','d','a','t'));
for (i = 0; i < os->nb_extra_packets; i++) {
AV_WB24(os->extra_packets[i] + 4, start_ts);
os->extra_packets[i][7] = (start_ts >> 24) & 0x7f;
avio_write(os->out, os->extra_packets[i], os->extra_packet_sizes[i]);
}
return 0;
}
static void close_file(AVFormatContext *s, OutputStream *os)
{
int64_t pos = avio_tell(os->out);
avio_seek(os->out, 0, SEEK_SET);
avio_wb32(os->out, pos);
avio_flush(os->out);
ff_format_io_close(s, &os->out);
}
static int hds_write_header(AVFormatContext *s)
{
HDSContext *c = s->priv_data;
int ret = 0, i;
AVOutputFormat *oformat;
if (mkdir(s->filename, 0777) == -1 && errno != EEXIST) {
ret = AVERROR(errno);
av_log(s, AV_LOG_ERROR , "Failed to create directory %s\n", s->filename);
goto fail;
}
oformat = av_guess_format("flv", NULL, NULL);
if (!oformat) {
ret = AVERROR_MUXER_NOT_FOUND;
goto fail;
}
c->streams = av_mallocz_array(s->nb_streams, sizeof(*c->streams));
if (!c->streams) {
ret = AVERROR(ENOMEM);
goto fail;
}
for (i = 0; i < s->nb_streams; i++) {
OutputStream *os = &c->streams[c->nb_streams];
AVFormatContext *ctx;
AVStream *st = s->streams[i];
if (!st->codecpar->bit_rate) {
av_log(s, AV_LOG_ERROR, "No bit rate set for stream %d\n", i);
ret = AVERROR(EINVAL);
goto fail;
}
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
if (os->has_video) {
c->nb_streams++;
os++;
}
os->has_video = 1;
} else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
if (os->has_audio) {
c->nb_streams++;
os++;
}
os->has_audio = 1;
} else {
av_log(s, AV_LOG_ERROR, "Unsupported stream type in stream %d\n", i);
ret = AVERROR(EINVAL);
goto fail;
}
os->bitrate += s->streams[i]->codecpar->bit_rate;
if (!os->ctx) {
os->first_stream = i;
ctx = avformat_alloc_context();
if (!ctx) {
ret = AVERROR(ENOMEM);
goto fail;
}
os->ctx = ctx;
ctx->oformat = oformat;
ctx->interrupt_callback = s->interrupt_callback;
ctx->flags = s->flags;
ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf),
AVIO_FLAG_WRITE, os,
NULL, hds_write, NULL);
if (!ctx->pb) {
ret = AVERROR(ENOMEM);
goto fail;
}
} else {
ctx = os->ctx;
}
s->streams[i]->id = c->nb_streams;
if (!(st = avformat_new_stream(ctx, NULL))) {
ret = AVERROR(ENOMEM);
goto fail;
}
avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
st->codecpar->codec_tag = 0;
st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
st->time_base = s->streams[i]->time_base;
}
if (c->streams[c->nb_streams].ctx)
c->nb_streams++;
for (i = 0; i < c->nb_streams; i++) {
OutputStream *os = &c->streams[i];
int j;
if ((ret = avformat_write_header(os->ctx, NULL)) < 0) {
goto fail;
}
os->ctx_inited = 1;
avio_flush(os->ctx->pb);
for (j = 0; j < os->ctx->nb_streams; j++)
s->streams[os->first_stream + j]->time_base = os->ctx->streams[j]->time_base;
snprintf(os->temp_filename, sizeof(os->temp_filename),
"%s/stream%d_temp", s->filename, i);
ret = init_file(s, os, 0);
if (ret < 0)
goto fail;
if (!os->has_video && c->min_frag_duration <= 0) {
av_log(s, AV_LOG_WARNING,
"No video stream in output stream %d and no min frag duration set\n", i);
ret = AVERROR(EINVAL);
}
os->fragment_index = 1;
write_abst(s, os, 0);
}
ret = write_manifest(s, 0);
fail:
if (ret)
hds_free(s);
return ret;
}
static int add_fragment(OutputStream *os, const char *file,
int64_t start_time, int64_t duration)
{
Fragment *frag;
if (duration == 0)
duration = 1;
if (os->nb_fragments >= os->fragments_size) {
int ret;
os->fragments_size = (os->fragments_size + 1) * 2;
if ((ret = av_reallocp_array(&os->fragments, os->fragments_size,
sizeof(*os->fragments))) < 0) {
os->fragments_size = 0;
os->nb_fragments = 0;
return ret;
}
}
frag = av_mallocz(sizeof(*frag));
if (!frag)
return AVERROR(ENOMEM);
av_strlcpy(frag->file, file, sizeof(frag->file));
frag->start_time = start_time;
frag->duration = duration;
frag->n = os->fragment_index;
os->fragments[os->nb_fragments++] = frag;
os->fragment_index++;
return 0;
}
static int hds_flush(AVFormatContext *s, OutputStream *os, int final,
int64_t end_ts)
{
HDSContext *c = s->priv_data;
int i, ret = 0;
char target_filename[1024];
int index = s->streams[os->first_stream]->id;
if (!os->packets_written)
return 0;
avio_flush(os->ctx->pb);
os->packets_written = 0;
close_file(s, os);
snprintf(target_filename, sizeof(target_filename),
"%s/stream%dSeg1-Frag%d", s->filename, index, os->fragment_index);
ret = ff_rename(os->temp_filename, target_filename, s);
if (ret < 0)
return ret;
add_fragment(os, target_filename, os->frag_start_ts, end_ts - os->frag_start_ts);
if (!final) {
ret = init_file(s, os, end_ts);
if (ret < 0)
return ret;
}
if (c->window_size || (final && c->remove_at_exit)) {
int remove = os->nb_fragments - c->window_size - c->extra_window_size;
if (final && c->remove_at_exit)
remove = os->nb_fragments;
if (remove > 0) {
for (i = 0; i < remove; i++) {
unlink(os->fragments[i]->file);
av_freep(&os->fragments[i]);
}
os->nb_fragments -= remove;
memmove(os->fragments, os->fragments + remove,
os->nb_fragments * sizeof(*os->fragments));
}
}
if (ret >= 0)
ret = write_abst(s, os, final);
return ret;
}
static int hds_write_packet(AVFormatContext *s, AVPacket *pkt)
{
HDSContext *c = s->priv_data;
AVStream *st = s->streams[pkt->stream_index];
OutputStream *os = &c->streams[s->streams[pkt->stream_index]->id];
int64_t end_dts = os->fragment_index * (int64_t)c->min_frag_duration;
int ret;
if (st->first_dts == AV_NOPTS_VALUE)
st->first_dts = pkt->dts;
if ((!os->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
av_compare_ts(pkt->dts - st->first_dts, st->time_base,
end_dts, AV_TIME_BASE_Q) >= 0 &&
pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) {
if ((ret = hds_flush(s, os, 0, pkt->dts)) < 0)
return ret;
}
// Note, these fragment start timestamps, that represent a whole
// OutputStream, assume all streams in it have the same time base.
if (!os->packets_written)
os->frag_start_ts = pkt->dts;
os->last_ts = pkt->dts;
os->packets_written++;
return ff_write_chained(os->ctx, pkt->stream_index - os->first_stream, pkt, s, 0);
}
static int hds_write_trailer(AVFormatContext *s)
{
HDSContext *c = s->priv_data;
int i;
for (i = 0; i < c->nb_streams; i++)
hds_flush(s, &c->streams[i], 1, c->streams[i].last_ts);
write_manifest(s, 1);
if (c->remove_at_exit) {
char filename[1024];
snprintf(filename, sizeof(filename), "%s/index.f4m", s->filename);
unlink(filename);
for (i = 0; i < c->nb_streams; i++) {
snprintf(filename, sizeof(filename), "%s/stream%d.abst", s->filename, i);
unlink(filename);
}
rmdir(s->filename);
}
hds_free(s);
return 0;
}
#define OFFSET(x) offsetof(HDSContext, x)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
{ "extra_window_size", "number of fragments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
{ "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 10000000 }, 0, INT_MAX, E },
{ "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
{ NULL },
};
static const AVClass hds_class = {
.class_name = "HDS muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_hds_muxer = {
.name = "hds",
.long_name = NULL_IF_CONFIG_SMALL("HDS Muxer"),
.priv_data_size = sizeof(HDSContext),
.audio_codec = AV_CODEC_ID_AAC,
.video_codec = AV_CODEC_ID_H264,
.flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE,
.write_header = hds_write_header,
.write_packet = hds_write_packet,
.write_trailer = hds_write_trailer,
.priv_class = &hds_class,
};
|