]> git.sesse.net Git - ffmpeg/blob - libavformat/hlsplaylist.c
avformat/hlsenc: add EXT-X-I-FRAMES-ONLY tag support
[ffmpeg] / 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_audio_rendition(AVIOContext *out, char *agroup,
39                                   char *filename, char *language, int name_id, int is_default) {
40     if (!out || !agroup || !filename)
41         return;
42
43     avio_printf(out, "#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=\"group_%s\"", agroup);
44     avio_printf(out, ",NAME=\"audio_%d\",DEFAULT=%s,", name_id, is_default ? "YES" : "NO");
45     if (language) {
46         avio_printf(out, "LANGUAGE=\"%s\",", language);
47     }
48     avio_printf(out, "URI=\"%s\"\n", filename);
49 }
50
51 void ff_hls_write_stream_info(AVStream *st, AVIOContext *out,
52                               int bandwidth, char *filename, char *agroup,
53                               char *codecs, char *ccgroup) {
54
55     if (!out || !filename)
56         return;
57
58     if (!bandwidth) {
59         av_log(NULL, AV_LOG_WARNING,
60                 "Bandwidth info not available, set audio and video bitrates\n");
61         return;
62     }
63
64     avio_printf(out, "#EXT-X-STREAM-INF:BANDWIDTH=%d", bandwidth);
65     if (st && st->codecpar->width > 0 && st->codecpar->height > 0)
66         avio_printf(out, ",RESOLUTION=%dx%d", st->codecpar->width,
67                 st->codecpar->height);
68     if (codecs && strlen(codecs) > 0)
69         avio_printf(out, ",CODECS=\"%s\"", codecs);
70     if (agroup && strlen(agroup) > 0)
71         avio_printf(out, ",AUDIO=\"group_%s\"", agroup);
72     if (ccgroup && strlen(ccgroup) > 0)
73         avio_printf(out, ",CLOSED-CAPTIONS=\"%s\"", ccgroup);
74     avio_printf(out, "\n%s\n\n", filename);
75 }
76
77 void ff_hls_write_playlist_header(AVIOContext *out, int version, int allowcache,
78                                   int target_duration, int64_t sequence,
79                                   uint32_t playlist_type, int iframe_mode) {
80     if (!out)
81         return;
82     ff_hls_write_playlist_version(out, version);
83     if (allowcache == 0 || allowcache == 1) {
84         avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", allowcache == 0 ? "NO" : "YES");
85     }
86     avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
87     avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
88     av_log(NULL, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
89
90     if (playlist_type == PLAYLIST_TYPE_EVENT) {
91         avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
92     } else if (playlist_type == PLAYLIST_TYPE_VOD) {
93         avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
94     }
95     if (iframe_mode) {
96         avio_printf(out, "#EXT-X-I-FRAMES-ONLY\n");
97     }
98 }
99
100 void ff_hls_write_init_file(AVIOContext *out, char *filename,
101                             int byterange_mode, int64_t size, int64_t pos) {
102     avio_printf(out, "#EXT-X-MAP:URI=\"%s\"", filename);
103     if (byterange_mode) {
104         avio_printf(out, ",BYTERANGE=\"%"PRId64"@%"PRId64"\"", size, pos);
105     }
106     avio_printf(out, "\n");
107 }
108
109 int ff_hls_write_file_entry(AVIOContext *out, int insert_discont,
110                              int byterange_mode,
111                              double duration, int round_duration,
112                              int64_t size, int64_t pos, //Used only if HLS_SINGLE_FILE flag is set
113                              char *baseurl, //Ignored if NULL
114                              char *filename, double *prog_date_time,
115                              int64_t video_keyframe_size, int64_t video_keyframe_pos, int iframe_mode) {
116     if (!out || !filename)
117         return AVERROR(EINVAL);
118
119     if (insert_discont) {
120         avio_printf(out, "#EXT-X-DISCONTINUITY\n");
121     }
122     if (round_duration)
123         avio_printf(out, "#EXTINF:%ld,\n",  lrint(duration));
124     else
125         avio_printf(out, "#EXTINF:%f,\n", duration);
126     if (byterange_mode)
127         avio_printf(out, "#EXT-X-BYTERANGE:%"PRId64"@%"PRId64"\n", iframe_mode ? video_keyframe_size : size,
128                     iframe_mode ? video_keyframe_pos : pos);
129
130     if (prog_date_time) {
131         time_t tt, wrongsecs;
132         int milli;
133         struct tm *tm, tmpbuf;
134         char buf0[128], buf1[128];
135         tt = (int64_t)*prog_date_time;
136         milli = av_clip(lrint(1000*(*prog_date_time - tt)), 0, 999);
137         tm = localtime_r(&tt, &tmpbuf);
138         if (!strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm)) {
139             av_log(NULL, AV_LOG_DEBUG, "strftime error in ff_hls_write_file_entry\n");
140             return AVERROR_UNKNOWN;
141         }
142         if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
143             int tz_min, dst = tm->tm_isdst;
144             tm = gmtime_r(&tt, &tmpbuf);
145             tm->tm_isdst = dst;
146             wrongsecs = mktime(tm);
147             tz_min = (FFABS(wrongsecs - tt) + 30) / 60;
148             snprintf(buf1, sizeof(buf1),
149                      "%c%02d%02d",
150                      wrongsecs <= tt ? '+' : '-',
151                      tz_min / 60,
152                      tz_min % 60);
153         }
154         avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
155         *prog_date_time += duration;
156     }
157     if (baseurl)
158         avio_printf(out, "%s", baseurl);
159     avio_printf(out, "%s\n", filename);
160
161     return 0;
162 }
163
164 void ff_hls_write_end_list (AVIOContext *out) {
165     if (!out)
166         return;
167     avio_printf(out, "#EXT-X-ENDLIST\n");
168 }
169