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2ba45a60 DM |
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) | |
092a9121 | 148 | av_freep(&os->ctx->pb); |
2ba45a60 DM |
149 | if (os->ctx) |
150 | avformat_free_context(os->ctx); | |
092a9121 | 151 | av_freep(&os->metadata); |
2ba45a60 | 152 | for (j = 0; j < os->nb_extra_packets; j++) |
092a9121 | 153 | av_freep(&os->extra_packets[j]); |
2ba45a60 | 154 | for (j = 0; j < os->nb_fragments; j++) |
092a9121 DM |
155 | av_freep(&os->fragments[j]); |
156 | av_freep(&os->fragments); | |
2ba45a60 DM |
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) { | |
f6fa7814 | 177 | av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename); |
2ba45a60 DM |
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); | |
f6fa7814 | 207 | return ff_rename(temp_filename, filename, s); |
2ba45a60 DM |
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); | |
f6fa7814 | 288 | return ff_rename(temp_filename, filename, s); |
2ba45a60 DM |
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) { | |
2ba45a60 | 325 | ret = AVERROR(errno); |
f6fa7814 | 326 | av_log(s, AV_LOG_ERROR , "Failed to create directory %s\n", s->filename); |
2ba45a60 DM |
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); | |
f6fa7814 | 399 | st->codec->codec_tag = 0; |
2ba45a60 | 400 | st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio; |
f6fa7814 | 401 | st->time_base = s->streams[i]->time_base; |
2ba45a60 DM |
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); | |
f6fa7814 DM |
484 | ret = ff_rename(os->temp_filename, target_filename, s); |
485 | if (ret < 0) | |
486 | return ret; | |
2ba45a60 DM |
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); | |
092a9121 | 502 | av_freep(&os->fragments[i]); |
2ba45a60 DM |
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 | }; |