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ffmpeg/libavformat/hlsplaylist.c

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/*
* Apple HTTP Live Streaming segmenter
* Copyright (c) 2012, Luca Barbato
* Copyright (c) 2017 Akamai Technologies, Inc.
*
* 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 <stdint.h>
#include <time.h>
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "hlsplaylist.h"
void ff_hls_write_playlist_version(AVIOContext *out, int version)
{
if (!out)
return;
avio_printf(out, "#EXTM3U\n");
avio_printf(out, "#EXT-X-VERSION:%d\n", version);
}
void ff_hls_write_audio_rendition(AVIOContext *out, const char *agroup,
const char *filename, const char *language,
int name_id, int is_default, int nb_channels)
{
if (!out || !agroup || !filename)
return;
avio_printf(out, "#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=\"group_%s\"", agroup);
avio_printf(out, ",NAME=\"audio_%d\",DEFAULT=%s,", name_id, is_default ? "YES" : "NO");
if (language) {
avio_printf(out, "LANGUAGE=\"%s\",", language);
}
if (nb_channels) {
avio_printf(out, "CHANNELS=\"%d\",", nb_channels);
}
avio_printf(out, "URI=\"%s\"\n", filename);
}
void ff_hls_write_subtitle_rendition(AVIOContext *out, const char *sgroup,
const char *filename, const char *language,
const char *sname, int name_id, int is_default)
{
if (!out || !filename)
return;
avio_printf(out, "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"%s\"", sgroup);
if (sname) {
avio_printf(out, ",NAME=\"%s\",", sname);
} else {
avio_printf(out, ",NAME=\"subtitle_%d\",", name_id);
}
avio_printf(out, "DEFAULT=%s,", is_default ? "YES" : "NO");
if (language) {
avio_printf(out, "LANGUAGE=\"%s\",", language);
}
avio_printf(out, "URI=\"%s\"\n", filename);
}
void ff_hls_write_stream_info(AVStream *st, AVIOContext *out, int bandwidth,
int avg_bandwidth,
const char *filename, const char *agroup,
const char *codecs, const char *ccgroup,
const char *sgroup)
{
if (!out || !filename)
return;
if (!bandwidth) {
av_log(NULL, AV_LOG_WARNING,
"Bandwidth info not available, set audio and video bitrates\n");
return;
}
avio_printf(out, "#EXT-X-STREAM-INF:BANDWIDTH=%d", bandwidth);
if (avg_bandwidth)
avio_printf(out, ",AVERAGE-BANDWIDTH=%d", avg_bandwidth);
if (st && st->codecpar->width > 0 && st->codecpar->height > 0)
avio_printf(out, ",RESOLUTION=%dx%d", st->codecpar->width,
st->codecpar->height);
if (codecs && codecs[0])
avio_printf(out, ",CODECS=\"%s\"", codecs);
if (agroup && agroup[0])
avio_printf(out, ",AUDIO=\"group_%s\"", agroup);
if (ccgroup && ccgroup[0])
avio_printf(out, ",CLOSED-CAPTIONS=\"%s\"", ccgroup);
if (sgroup && sgroup[0])
avio_printf(out, ",SUBTITLES=\"%s\"", sgroup);
avio_printf(out, "\n%s\n\n", filename);
}
void ff_hls_write_playlist_header(AVIOContext *out, int version, int allowcache,
int target_duration, int64_t sequence,
uint32_t playlist_type, int iframe_mode)
{
if (!out)
return;
ff_hls_write_playlist_version(out, version);
if (allowcache == 0 || allowcache == 1) {
avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", allowcache == 0 ? "NO" : "YES");
}
avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
av_log(NULL, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
if (playlist_type == PLAYLIST_TYPE_EVENT) {
avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
} else if (playlist_type == PLAYLIST_TYPE_VOD) {
avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
}
if (iframe_mode) {
avio_printf(out, "#EXT-X-I-FRAMES-ONLY\n");
}
}
void ff_hls_write_init_file(AVIOContext *out, const char *filename,
int byterange_mode, int64_t size, int64_t pos)
{
avio_printf(out, "#EXT-X-MAP:URI=\"%s\"", filename);
if (byterange_mode) {
avio_printf(out, ",BYTERANGE=\"%"PRId64"@%"PRId64"\"", size, pos);
}
avio_printf(out, "\n");
}
int ff_hls_write_file_entry(AVIOContext *out, int insert_discont,
int byterange_mode, double duration,
int round_duration, int64_t size,
int64_t pos /* Used only if HLS_SINGLE_FILE flag is set */,
const char *baseurl /* Ignored if NULL */,
const char *filename, double *prog_date_time,
int64_t video_keyframe_size, int64_t video_keyframe_pos,
int iframe_mode)
{
if (!out || !filename)
return AVERROR(EINVAL);
if (insert_discont) {
avio_printf(out, "#EXT-X-DISCONTINUITY\n");
}
if (round_duration)
avio_printf(out, "#EXTINF:%ld,\n", lrint(duration));
else
avio_printf(out, "#EXTINF:%f,\n", duration);
if (byterange_mode)
avio_printf(out, "#EXT-X-BYTERANGE:%"PRId64"@%"PRId64"\n", iframe_mode ? video_keyframe_size : size,
iframe_mode ? video_keyframe_pos : pos);
if (prog_date_time) {
time_t tt, wrongsecs;
int milli;
struct tm *tm, tmpbuf;
char buf0[128], buf1[128];
tt = (int64_t)*prog_date_time;
milli = av_clip(lrint(1000*(*prog_date_time - tt)), 0, 999);
tm = localtime_r(&tt, &tmpbuf);
if (!strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm)) {
av_log(NULL, AV_LOG_DEBUG, "strftime error in ff_hls_write_file_entry\n");
return AVERROR_UNKNOWN;
}
if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
int tz_min, dst = tm->tm_isdst;
tm = gmtime_r(&tt, &tmpbuf);
tm->tm_isdst = dst;
wrongsecs = mktime(tm);
tz_min = (FFABS(wrongsecs - tt) + 30) / 60;
snprintf(buf1, sizeof(buf1),
"%c%02d%02d",
wrongsecs <= tt ? '+' : '-',
tz_min / 60,
tz_min % 60);
}
avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
*prog_date_time += duration;
}
if (baseurl)
avio_printf(out, "%s", baseurl);
avio_printf(out, "%s\n", filename);
return 0;
}
void ff_hls_write_end_list(AVIOContext *out)
{
if (!out)
return;
avio_printf(out, "#EXT-X-ENDLIST\n");
}
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