| 1 | /* |
| 2 | * Live HDS fragmenter |
| 3 | * Copyright (c) 2013 Martin Storsjo |
| 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 "config.h" |
| 23 | #include <float.h> |
| 24 | #if HAVE_UNISTD_H |
| 25 | #include <unistd.h> |
| 26 | #endif |
| 27 | |
| 28 | #include "avformat.h" |
| 29 | #include "internal.h" |
| 30 | #include "os_support.h" |
| 31 | |
| 32 | #include "libavutil/avstring.h" |
| 33 | #include "libavutil/base64.h" |
| 34 | #include "libavutil/intreadwrite.h" |
| 35 | #include "libavutil/mathematics.h" |
| 36 | #include "libavutil/opt.h" |
| 37 | |
| 38 | typedef struct Fragment { |
| 39 | char file[1024]; |
| 40 | int64_t start_time, duration; |
| 41 | int n; |
| 42 | } Fragment; |
| 43 | |
| 44 | typedef struct OutputStream { |
| 45 | int bitrate; |
| 46 | int first_stream; |
| 47 | AVFormatContext *ctx; |
| 48 | int ctx_inited; |
| 49 | uint8_t iobuf[32768]; |
| 50 | char temp_filename[1024]; |
| 51 | int64_t frag_start_ts, last_ts; |
| 52 | AVIOContext *out; |
| 53 | int packets_written; |
| 54 | int nb_fragments, fragments_size, fragment_index; |
| 55 | Fragment **fragments; |
| 56 | |
| 57 | int has_audio, has_video; |
| 58 | |
| 59 | uint8_t *metadata; |
| 60 | int metadata_size; |
| 61 | |
| 62 | uint8_t *extra_packets[2]; |
| 63 | int extra_packet_sizes[2]; |
| 64 | int nb_extra_packets; |
| 65 | } OutputStream; |
| 66 | |
| 67 | typedef struct HDSContext { |
| 68 | const AVClass *class; /* Class for private options. */ |
| 69 | int window_size; |
| 70 | int extra_window_size; |
| 71 | int min_frag_duration; |
| 72 | int remove_at_exit; |
| 73 | |
| 74 | OutputStream *streams; |
| 75 | int nb_streams; |
| 76 | } HDSContext; |
| 77 | |
| 78 | static int parse_header(OutputStream *os, const uint8_t *buf, int buf_size) |
| 79 | { |
| 80 | if (buf_size < 13) |
| 81 | return AVERROR_INVALIDDATA; |
| 82 | if (memcmp(buf, "FLV", 3)) |
| 83 | return AVERROR_INVALIDDATA; |
| 84 | buf += 13; |
| 85 | buf_size -= 13; |
| 86 | while (buf_size >= 11 + 4) { |
| 87 | int type = buf[0]; |
| 88 | int size = AV_RB24(&buf[1]) + 11 + 4; |
| 89 | if (size > buf_size) |
| 90 | return AVERROR_INVALIDDATA; |
| 91 | if (type == 8 || type == 9) { |
| 92 | if (os->nb_extra_packets >= FF_ARRAY_ELEMS(os->extra_packets)) |
| 93 | return AVERROR_INVALIDDATA; |
| 94 | os->extra_packet_sizes[os->nb_extra_packets] = size; |
| 95 | os->extra_packets[os->nb_extra_packets] = av_malloc(size); |
| 96 | if (!os->extra_packets[os->nb_extra_packets]) |
| 97 | return AVERROR(ENOMEM); |
| 98 | memcpy(os->extra_packets[os->nb_extra_packets], buf, size); |
| 99 | os->nb_extra_packets++; |
| 100 | } else if (type == 0x12) { |
| 101 | if (os->metadata) |
| 102 | return AVERROR_INVALIDDATA; |
| 103 | os->metadata_size = size - 11 - 4; |
| 104 | os->metadata = av_malloc(os->metadata_size); |
| 105 | if (!os->metadata) |
| 106 | return AVERROR(ENOMEM); |
| 107 | memcpy(os->metadata, buf + 11, os->metadata_size); |
| 108 | } |
| 109 | buf += size; |
| 110 | buf_size -= size; |
| 111 | } |
| 112 | if (!os->metadata) |
| 113 | return AVERROR_INVALIDDATA; |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static int hds_write(void *opaque, uint8_t *buf, int buf_size) |
| 118 | { |
| 119 | OutputStream *os = opaque; |
| 120 | if (os->out) { |
| 121 | avio_write(os->out, buf, buf_size); |
| 122 | } else { |
| 123 | if (!os->metadata_size) { |
| 124 | int ret; |
| 125 | // Assuming the IO buffer is large enough to fit the |
| 126 | // FLV header and all metadata and extradata packets |
| 127 | if ((ret = parse_header(os, buf, buf_size)) < 0) |
| 128 | return ret; |
| 129 | } |
| 130 | } |
| 131 | return buf_size; |
| 132 | } |
| 133 | |
| 134 | static void hds_free(AVFormatContext *s) |
| 135 | { |
| 136 | HDSContext *c = s->priv_data; |
| 137 | int i, j; |
| 138 | if (!c->streams) |
| 139 | return; |
| 140 | for (i = 0; i < s->nb_streams; i++) { |
| 141 | OutputStream *os = &c->streams[i]; |
| 142 | if (os->out) |
| 143 | avio_close(os->out); |
| 144 | os->out = NULL; |
| 145 | if (os->ctx && os->ctx_inited) |
| 146 | av_write_trailer(os->ctx); |
| 147 | if (os->ctx && os->ctx->pb) |
| 148 | av_free(os->ctx->pb); |
| 149 | if (os->ctx) |
| 150 | avformat_free_context(os->ctx); |
| 151 | av_free(os->metadata); |
| 152 | for (j = 0; j < os->nb_extra_packets; j++) |
| 153 | av_free(os->extra_packets[j]); |
| 154 | for (j = 0; j < os->nb_fragments; j++) |
| 155 | av_free(os->fragments[j]); |
| 156 | av_free(os->fragments); |
| 157 | } |
| 158 | av_freep(&c->streams); |
| 159 | } |
| 160 | |
| 161 | static int write_manifest(AVFormatContext *s, int final) |
| 162 | { |
| 163 | HDSContext *c = s->priv_data; |
| 164 | AVIOContext *out; |
| 165 | char filename[1024], temp_filename[1024]; |
| 166 | int ret, i; |
| 167 | float duration = 0; |
| 168 | |
| 169 | if (c->nb_streams > 0) |
| 170 | duration = c->streams[0].last_ts * av_q2d(s->streams[0]->time_base); |
| 171 | |
| 172 | snprintf(filename, sizeof(filename), "%s/index.f4m", s->filename); |
| 173 | snprintf(temp_filename, sizeof(temp_filename), "%s/index.f4m.tmp", s->filename); |
| 174 | ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, |
| 175 | &s->interrupt_callback, NULL); |
| 176 | if (ret < 0) { |
| 177 | av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename); |
| 178 | return ret; |
| 179 | } |
| 180 | avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); |
| 181 | avio_printf(out, "<manifest xmlns=\"http://ns.adobe.com/f4m/1.0\">\n"); |
| 182 | avio_printf(out, "\t<id>%s</id>\n", av_basename(s->filename)); |
| 183 | avio_printf(out, "\t<streamType>%s</streamType>\n", |
| 184 | final ? "recorded" : "live"); |
| 185 | avio_printf(out, "\t<deliveryType>streaming</deliveryType>\n"); |
| 186 | if (final) |
| 187 | avio_printf(out, "\t<duration>%f</duration>\n", duration); |
| 188 | for (i = 0; i < c->nb_streams; i++) { |
| 189 | OutputStream *os = &c->streams[i]; |
| 190 | int b64_size = AV_BASE64_SIZE(os->metadata_size); |
| 191 | char *base64 = av_malloc(b64_size); |
| 192 | if (!base64) { |
| 193 | avio_close(out); |
| 194 | return AVERROR(ENOMEM); |
| 195 | } |
| 196 | av_base64_encode(base64, b64_size, os->metadata, os->metadata_size); |
| 197 | |
| 198 | avio_printf(out, "\t<bootstrapInfo profile=\"named\" url=\"stream%d.abst\" id=\"bootstrap%d\" />\n", i, i); |
| 199 | avio_printf(out, "\t<media bitrate=\"%d\" url=\"stream%d\" bootstrapInfoId=\"bootstrap%d\">\n", os->bitrate/1000, i, i); |
| 200 | avio_printf(out, "\t\t<metadata>%s</metadata>\n", base64); |
| 201 | avio_printf(out, "\t</media>\n"); |
| 202 | av_free(base64); |
| 203 | } |
| 204 | avio_printf(out, "</manifest>\n"); |
| 205 | avio_flush(out); |
| 206 | avio_close(out); |
| 207 | return ff_rename(temp_filename, filename, s); |
| 208 | } |
| 209 | |
| 210 | static void update_size(AVIOContext *out, int64_t pos) |
| 211 | { |
| 212 | int64_t end = avio_tell(out); |
| 213 | avio_seek(out, pos, SEEK_SET); |
| 214 | avio_wb32(out, end - pos); |
| 215 | avio_seek(out, end, SEEK_SET); |
| 216 | } |
| 217 | |
| 218 | /* Note, the .abst files need to be served with the "binary/octet" |
| 219 | * mime type, otherwise at least the OSMF player can easily fail |
| 220 | * with "stream not found" when polling for the next fragment. */ |
| 221 | static int write_abst(AVFormatContext *s, OutputStream *os, int final) |
| 222 | { |
| 223 | HDSContext *c = s->priv_data; |
| 224 | AVIOContext *out; |
| 225 | char filename[1024], temp_filename[1024]; |
| 226 | int i, ret; |
| 227 | int64_t asrt_pos, afrt_pos; |
| 228 | int start = 0, fragments; |
| 229 | int index = s->streams[os->first_stream]->id; |
| 230 | int64_t cur_media_time = 0; |
| 231 | if (c->window_size) |
| 232 | start = FFMAX(os->nb_fragments - c->window_size, 0); |
| 233 | fragments = os->nb_fragments - start; |
| 234 | if (final) |
| 235 | cur_media_time = os->last_ts; |
| 236 | else if (os->nb_fragments) |
| 237 | cur_media_time = os->fragments[os->nb_fragments - 1]->start_time; |
| 238 | |
| 239 | snprintf(filename, sizeof(filename), |
| 240 | "%s/stream%d.abst", s->filename, index); |
| 241 | snprintf(temp_filename, sizeof(temp_filename), |
| 242 | "%s/stream%d.abst.tmp", s->filename, index); |
| 243 | ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, |
| 244 | &s->interrupt_callback, NULL); |
| 245 | if (ret < 0) { |
| 246 | av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename); |
| 247 | return ret; |
| 248 | } |
| 249 | avio_wb32(out, 0); // abst size |
| 250 | avio_wl32(out, MKTAG('a','b','s','t')); |
| 251 | avio_wb32(out, 0); // version + flags |
| 252 | avio_wb32(out, os->fragment_index - 1); // BootstrapinfoVersion |
| 253 | avio_w8(out, final ? 0 : 0x20); // profile, live, update |
| 254 | avio_wb32(out, 1000); // timescale |
| 255 | avio_wb64(out, cur_media_time); |
| 256 | avio_wb64(out, 0); // SmpteTimeCodeOffset |
| 257 | avio_w8(out, 0); // MovieIdentifer (null string) |
| 258 | avio_w8(out, 0); // ServerEntryCount |
| 259 | avio_w8(out, 0); // QualityEntryCount |
| 260 | avio_w8(out, 0); // DrmData (null string) |
| 261 | avio_w8(out, 0); // MetaData (null string) |
| 262 | avio_w8(out, 1); // SegmentRunTableCount |
| 263 | asrt_pos = avio_tell(out); |
| 264 | avio_wb32(out, 0); // asrt size |
| 265 | avio_wl32(out, MKTAG('a','s','r','t')); |
| 266 | avio_wb32(out, 0); // version + flags |
| 267 | avio_w8(out, 0); // QualityEntryCount |
| 268 | avio_wb32(out, 1); // SegmentRunEntryCount |
| 269 | avio_wb32(out, 1); // FirstSegment |
| 270 | avio_wb32(out, final ? (os->fragment_index - 1) : 0xffffffff); // FragmentsPerSegment |
| 271 | update_size(out, asrt_pos); |
| 272 | avio_w8(out, 1); // FragmentRunTableCount |
| 273 | afrt_pos = avio_tell(out); |
| 274 | avio_wb32(out, 0); // afrt size |
| 275 | avio_wl32(out, MKTAG('a','f','r','t')); |
| 276 | avio_wb32(out, 0); // version + flags |
| 277 | avio_wb32(out, 1000); // timescale |
| 278 | avio_w8(out, 0); // QualityEntryCount |
| 279 | avio_wb32(out, fragments); // FragmentRunEntryCount |
| 280 | for (i = start; i < os->nb_fragments; i++) { |
| 281 | avio_wb32(out, os->fragments[i]->n); |
| 282 | avio_wb64(out, os->fragments[i]->start_time); |
| 283 | avio_wb32(out, os->fragments[i]->duration); |
| 284 | } |
| 285 | update_size(out, afrt_pos); |
| 286 | update_size(out, 0); |
| 287 | avio_close(out); |
| 288 | return ff_rename(temp_filename, filename, s); |
| 289 | } |
| 290 | |
| 291 | static int init_file(AVFormatContext *s, OutputStream *os, int64_t start_ts) |
| 292 | { |
| 293 | int ret, i; |
| 294 | ret = avio_open2(&os->out, os->temp_filename, AVIO_FLAG_WRITE, |
| 295 | &s->interrupt_callback, NULL); |
| 296 | if (ret < 0) |
| 297 | return ret; |
| 298 | avio_wb32(os->out, 0); |
| 299 | avio_wl32(os->out, MKTAG('m','d','a','t')); |
| 300 | for (i = 0; i < os->nb_extra_packets; i++) { |
| 301 | AV_WB24(os->extra_packets[i] + 4, start_ts); |
| 302 | os->extra_packets[i][7] = (start_ts >> 24) & 0x7f; |
| 303 | avio_write(os->out, os->extra_packets[i], os->extra_packet_sizes[i]); |
| 304 | } |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | static void close_file(OutputStream *os) |
| 309 | { |
| 310 | int64_t pos = avio_tell(os->out); |
| 311 | avio_seek(os->out, 0, SEEK_SET); |
| 312 | avio_wb32(os->out, pos); |
| 313 | avio_flush(os->out); |
| 314 | avio_close(os->out); |
| 315 | os->out = NULL; |
| 316 | } |
| 317 | |
| 318 | static int hds_write_header(AVFormatContext *s) |
| 319 | { |
| 320 | HDSContext *c = s->priv_data; |
| 321 | int ret = 0, i; |
| 322 | AVOutputFormat *oformat; |
| 323 | |
| 324 | if (mkdir(s->filename, 0777) == -1 && errno != EEXIST) { |
| 325 | ret = AVERROR(errno); |
| 326 | av_log(s, AV_LOG_ERROR , "Failed to create directory %s\n", s->filename); |
| 327 | goto fail; |
| 328 | } |
| 329 | |
| 330 | oformat = av_guess_format("flv", NULL, NULL); |
| 331 | if (!oformat) { |
| 332 | ret = AVERROR_MUXER_NOT_FOUND; |
| 333 | goto fail; |
| 334 | } |
| 335 | |
| 336 | c->streams = av_mallocz_array(s->nb_streams, sizeof(*c->streams)); |
| 337 | if (!c->streams) { |
| 338 | ret = AVERROR(ENOMEM); |
| 339 | goto fail; |
| 340 | } |
| 341 | |
| 342 | for (i = 0; i < s->nb_streams; i++) { |
| 343 | OutputStream *os = &c->streams[c->nb_streams]; |
| 344 | AVFormatContext *ctx; |
| 345 | AVStream *st = s->streams[i]; |
| 346 | |
| 347 | if (!st->codec->bit_rate) { |
| 348 | av_log(s, AV_LOG_ERROR, "No bit rate set for stream %d\n", i); |
| 349 | ret = AVERROR(EINVAL); |
| 350 | goto fail; |
| 351 | } |
| 352 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 353 | if (os->has_video) { |
| 354 | c->nb_streams++; |
| 355 | os++; |
| 356 | } |
| 357 | os->has_video = 1; |
| 358 | } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 359 | if (os->has_audio) { |
| 360 | c->nb_streams++; |
| 361 | os++; |
| 362 | } |
| 363 | os->has_audio = 1; |
| 364 | } else { |
| 365 | av_log(s, AV_LOG_ERROR, "Unsupported stream type in stream %d\n", i); |
| 366 | ret = AVERROR(EINVAL); |
| 367 | goto fail; |
| 368 | } |
| 369 | os->bitrate += s->streams[i]->codec->bit_rate; |
| 370 | |
| 371 | if (!os->ctx) { |
| 372 | os->first_stream = i; |
| 373 | ctx = avformat_alloc_context(); |
| 374 | if (!ctx) { |
| 375 | ret = AVERROR(ENOMEM); |
| 376 | goto fail; |
| 377 | } |
| 378 | os->ctx = ctx; |
| 379 | ctx->oformat = oformat; |
| 380 | ctx->interrupt_callback = s->interrupt_callback; |
| 381 | |
| 382 | ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), |
| 383 | AVIO_FLAG_WRITE, os, |
| 384 | NULL, hds_write, NULL); |
| 385 | if (!ctx->pb) { |
| 386 | ret = AVERROR(ENOMEM); |
| 387 | goto fail; |
| 388 | } |
| 389 | } else { |
| 390 | ctx = os->ctx; |
| 391 | } |
| 392 | s->streams[i]->id = c->nb_streams; |
| 393 | |
| 394 | if (!(st = avformat_new_stream(ctx, NULL))) { |
| 395 | ret = AVERROR(ENOMEM); |
| 396 | goto fail; |
| 397 | } |
| 398 | avcodec_copy_context(st->codec, s->streams[i]->codec); |
| 399 | st->codec->codec_tag = 0; |
| 400 | st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio; |
| 401 | st->time_base = s->streams[i]->time_base; |
| 402 | } |
| 403 | if (c->streams[c->nb_streams].ctx) |
| 404 | c->nb_streams++; |
| 405 | |
| 406 | for (i = 0; i < c->nb_streams; i++) { |
| 407 | OutputStream *os = &c->streams[i]; |
| 408 | int j; |
| 409 | if ((ret = avformat_write_header(os->ctx, NULL)) < 0) { |
| 410 | goto fail; |
| 411 | } |
| 412 | os->ctx_inited = 1; |
| 413 | avio_flush(os->ctx->pb); |
| 414 | for (j = 0; j < os->ctx->nb_streams; j++) |
| 415 | s->streams[os->first_stream + j]->time_base = os->ctx->streams[j]->time_base; |
| 416 | |
| 417 | snprintf(os->temp_filename, sizeof(os->temp_filename), |
| 418 | "%s/stream%d_temp", s->filename, i); |
| 419 | ret = init_file(s, os, 0); |
| 420 | if (ret < 0) |
| 421 | goto fail; |
| 422 | |
| 423 | if (!os->has_video && c->min_frag_duration <= 0) { |
| 424 | av_log(s, AV_LOG_WARNING, |
| 425 | "No video stream in output stream %d and no min frag duration set\n", i); |
| 426 | ret = AVERROR(EINVAL); |
| 427 | } |
| 428 | os->fragment_index = 1; |
| 429 | write_abst(s, os, 0); |
| 430 | } |
| 431 | ret = write_manifest(s, 0); |
| 432 | |
| 433 | fail: |
| 434 | if (ret) |
| 435 | hds_free(s); |
| 436 | return ret; |
| 437 | } |
| 438 | |
| 439 | static int add_fragment(OutputStream *os, const char *file, |
| 440 | int64_t start_time, int64_t duration) |
| 441 | { |
| 442 | Fragment *frag; |
| 443 | if (duration == 0) |
| 444 | duration = 1; |
| 445 | if (os->nb_fragments >= os->fragments_size) { |
| 446 | int ret; |
| 447 | os->fragments_size = (os->fragments_size + 1) * 2; |
| 448 | if ((ret = av_reallocp_array(&os->fragments, os->fragments_size, |
| 449 | sizeof(*os->fragments))) < 0) { |
| 450 | os->fragments_size = 0; |
| 451 | os->nb_fragments = 0; |
| 452 | return ret; |
| 453 | } |
| 454 | } |
| 455 | frag = av_mallocz(sizeof(*frag)); |
| 456 | if (!frag) |
| 457 | return AVERROR(ENOMEM); |
| 458 | av_strlcpy(frag->file, file, sizeof(frag->file)); |
| 459 | frag->start_time = start_time; |
| 460 | frag->duration = duration; |
| 461 | frag->n = os->fragment_index; |
| 462 | os->fragments[os->nb_fragments++] = frag; |
| 463 | os->fragment_index++; |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | static int hds_flush(AVFormatContext *s, OutputStream *os, int final, |
| 468 | int64_t end_ts) |
| 469 | { |
| 470 | HDSContext *c = s->priv_data; |
| 471 | int i, ret = 0; |
| 472 | char target_filename[1024]; |
| 473 | int index = s->streams[os->first_stream]->id; |
| 474 | |
| 475 | if (!os->packets_written) |
| 476 | return 0; |
| 477 | |
| 478 | avio_flush(os->ctx->pb); |
| 479 | os->packets_written = 0; |
| 480 | close_file(os); |
| 481 | |
| 482 | snprintf(target_filename, sizeof(target_filename), |
| 483 | "%s/stream%dSeg1-Frag%d", s->filename, index, os->fragment_index); |
| 484 | ret = ff_rename(os->temp_filename, target_filename, s); |
| 485 | if (ret < 0) |
| 486 | return ret; |
| 487 | add_fragment(os, target_filename, os->frag_start_ts, end_ts - os->frag_start_ts); |
| 488 | |
| 489 | if (!final) { |
| 490 | ret = init_file(s, os, end_ts); |
| 491 | if (ret < 0) |
| 492 | return ret; |
| 493 | } |
| 494 | |
| 495 | if (c->window_size || (final && c->remove_at_exit)) { |
| 496 | int remove = os->nb_fragments - c->window_size - c->extra_window_size; |
| 497 | if (final && c->remove_at_exit) |
| 498 | remove = os->nb_fragments; |
| 499 | if (remove > 0) { |
| 500 | for (i = 0; i < remove; i++) { |
| 501 | unlink(os->fragments[i]->file); |
| 502 | av_free(os->fragments[i]); |
| 503 | } |
| 504 | os->nb_fragments -= remove; |
| 505 | memmove(os->fragments, os->fragments + remove, |
| 506 | os->nb_fragments * sizeof(*os->fragments)); |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | if (ret >= 0) |
| 511 | ret = write_abst(s, os, final); |
| 512 | return ret; |
| 513 | } |
| 514 | |
| 515 | static int hds_write_packet(AVFormatContext *s, AVPacket *pkt) |
| 516 | { |
| 517 | HDSContext *c = s->priv_data; |
| 518 | AVStream *st = s->streams[pkt->stream_index]; |
| 519 | OutputStream *os = &c->streams[s->streams[pkt->stream_index]->id]; |
| 520 | int64_t end_dts = os->fragment_index * (int64_t)c->min_frag_duration; |
| 521 | int ret; |
| 522 | |
| 523 | if (st->first_dts == AV_NOPTS_VALUE) |
| 524 | st->first_dts = pkt->dts; |
| 525 | |
| 526 | if ((!os->has_video || st->codec->codec_type == AVMEDIA_TYPE_VIDEO) && |
| 527 | av_compare_ts(pkt->dts - st->first_dts, st->time_base, |
| 528 | end_dts, AV_TIME_BASE_Q) >= 0 && |
| 529 | pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) { |
| 530 | |
| 531 | if ((ret = hds_flush(s, os, 0, pkt->dts)) < 0) |
| 532 | return ret; |
| 533 | } |
| 534 | |
| 535 | // Note, these fragment start timestamps, that represent a whole |
| 536 | // OutputStream, assume all streams in it have the same time base. |
| 537 | if (!os->packets_written) |
| 538 | os->frag_start_ts = pkt->dts; |
| 539 | os->last_ts = pkt->dts; |
| 540 | |
| 541 | os->packets_written++; |
| 542 | return ff_write_chained(os->ctx, pkt->stream_index - os->first_stream, pkt, s, 0); |
| 543 | } |
| 544 | |
| 545 | static int hds_write_trailer(AVFormatContext *s) |
| 546 | { |
| 547 | HDSContext *c = s->priv_data; |
| 548 | int i; |
| 549 | |
| 550 | for (i = 0; i < c->nb_streams; i++) |
| 551 | hds_flush(s, &c->streams[i], 1, c->streams[i].last_ts); |
| 552 | write_manifest(s, 1); |
| 553 | |
| 554 | if (c->remove_at_exit) { |
| 555 | char filename[1024]; |
| 556 | snprintf(filename, sizeof(filename), "%s/index.f4m", s->filename); |
| 557 | unlink(filename); |
| 558 | for (i = 0; i < c->nb_streams; i++) { |
| 559 | snprintf(filename, sizeof(filename), "%s/stream%d.abst", s->filename, i); |
| 560 | unlink(filename); |
| 561 | } |
| 562 | rmdir(s->filename); |
| 563 | } |
| 564 | |
| 565 | hds_free(s); |
| 566 | return 0; |
| 567 | } |
| 568 | |
| 569 | #define OFFSET(x) offsetof(HDSContext, x) |
| 570 | #define E AV_OPT_FLAG_ENCODING_PARAM |
| 571 | static const AVOption options[] = { |
| 572 | { "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E }, |
| 573 | { "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 }, |
| 574 | { "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 10000000 }, 0, INT_MAX, E }, |
| 575 | { "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E }, |
| 576 | { NULL }, |
| 577 | }; |
| 578 | |
| 579 | static const AVClass hds_class = { |
| 580 | .class_name = "HDS muxer", |
| 581 | .item_name = av_default_item_name, |
| 582 | .option = options, |
| 583 | .version = LIBAVUTIL_VERSION_INT, |
| 584 | }; |
| 585 | |
| 586 | AVOutputFormat ff_hds_muxer = { |
| 587 | .name = "hds", |
| 588 | .long_name = NULL_IF_CONFIG_SMALL("HDS Muxer"), |
| 589 | .priv_data_size = sizeof(HDSContext), |
| 590 | .audio_codec = AV_CODEC_ID_AAC, |
| 591 | .video_codec = AV_CODEC_ID_H264, |
| 592 | .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE, |
| 593 | .write_header = hds_write_header, |
| 594 | .write_packet = hds_write_packet, |
| 595 | .write_trailer = hds_write_trailer, |
| 596 | .priv_class = &hds_class, |
| 597 | }; |