avformat/dashenc: avformat/dashenc: Fix the EXT-X-TARGETDURATION as per the hls speci...
[ffmpeg.git] / libavformat / hlsplaylist.c
1 /*
2  * Apple HTTP Live Streaming segmenter
3  * Copyright (c) 2012, Luca Barbato
4  * Copyright (c) 2017 Akamai Technologies, Inc.
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 #include "config.h"
24 #include <stdint.h>
25
26 #include "libavutil/time_internal.h"
27
28 #include "avformat.h"
29 #include "hlsplaylist.h"
30
31 void ff_hls_write_playlist_version(AVIOContext *out, int version) {
32     if (!out)
33         return;
34     avio_printf(out, "#EXTM3U\n");
35     avio_printf(out, "#EXT-X-VERSION:%d\n", version);
36 }
37
38 void ff_hls_write_stream_info(AVStream *st, AVIOContext *out,
39                               int bandwidth, char *filename) {
40     if (!out || !filename)
41         return;
42
43     if (!bandwidth) {
44         av_log(NULL, AV_LOG_WARNING,
45                 "Bandwidth info not available, set audio and video bitrates\n");
46         return;
47     }
48
49     avio_printf(out, "#EXT-X-STREAM-INF:BANDWIDTH=%d", bandwidth);
50     if (st && st->codecpar->width > 0 && st->codecpar->height > 0)
51         avio_printf(out, ",RESOLUTION=%dx%d", st->codecpar->width,
52                 st->codecpar->height);
53     avio_printf(out, "\n%s\n\n", filename);
54 }
55
56 void ff_hls_write_playlist_header(AVIOContext *out, int version, int allowcache,
57                                   int target_duration, int64_t sequence,
58                                   uint32_t playlist_type) {
59     if (!out)
60         return;
61     ff_hls_write_playlist_version(out, version);
62     if (allowcache == 0 || allowcache == 1) {
63         avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", allowcache == 0 ? "NO" : "YES");
64     }
65     avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
66     avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
67     av_log(NULL, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
68
69     if (playlist_type == PLAYLIST_TYPE_EVENT) {
70         avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
71     } else if (playlist_type == PLAYLIST_TYPE_VOD) {
72         avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
73     }
74 }
75
76 void ff_hls_write_init_file(AVIOContext *out, char *filename,
77                             int byterange_mode, int64_t size, int64_t pos) {
78     avio_printf(out, "#EXT-X-MAP:URI=\"%s\"", filename);
79     if (byterange_mode) {
80         avio_printf(out, ",BYTERANGE=\"%"PRId64"@%"PRId64"\"", size, pos);
81     }
82     avio_printf(out, "\n");
83 }
84
85 int ff_hls_write_file_entry(AVIOContext *out, int insert_discont,
86                              int byterange_mode,
87                              double duration, int round_duration,
88                              int64_t size, int64_t pos, //Used only if HLS_SINGLE_FILE flag is set
89                              char *baseurl, //Ignored if NULL
90                              char *filename, double *prog_date_time) {
91     if (!out || !filename)
92         return AVERROR(EINVAL);
93
94     if (insert_discont) {
95         avio_printf(out, "#EXT-X-DISCONTINUITY\n");
96     }
97     if (round_duration)
98         avio_printf(out, "#EXTINF:%ld,\n",  lrint(duration));
99     else
100         avio_printf(out, "#EXTINF:%f,\n", duration);
101     if (byterange_mode)
102         avio_printf(out, "#EXT-X-BYTERANGE:%"PRId64"@%"PRId64"\n", size, pos);
103
104     if (prog_date_time) {
105         time_t tt, wrongsecs;
106         int milli;
107         struct tm *tm, tmpbuf;
108         char buf0[128], buf1[128];
109         tt = (int64_t)*prog_date_time;
110         milli = av_clip(lrint(1000*(*prog_date_time - tt)), 0, 999);
111         tm = localtime_r(&tt, &tmpbuf);
112         if (!strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm)) {
113             av_log(NULL, AV_LOG_DEBUG, "strftime error in ff_hls_write_file_entry\n");
114             return AVERROR_UNKNOWN;
115         }
116         if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
117             int tz_min, dst = tm->tm_isdst;
118             tm = gmtime_r(&tt, &tmpbuf);
119             tm->tm_isdst = dst;
120             wrongsecs = mktime(tm);
121             tz_min = (FFABS(wrongsecs - tt) + 30) / 60;
122             snprintf(buf1, sizeof(buf1),
123                      "%c%02d%02d",
124                      wrongsecs <= tt ? '+' : '-',
125                      tz_min / 60,
126                      tz_min % 60);
127         }
128         avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
129         *prog_date_time += duration;
130     }
131     if (baseurl)
132         avio_printf(out, "%s", baseurl);
133     avio_printf(out, "%s\n", filename);
134
135     return 0;
136 }
137
138 void ff_hls_write_end_list (AVIOContext *out) {
139     if (!out)
140         return;
141     avio_printf(out, "#EXT-X-ENDLIST\n");
142 }
143