196 lines
7.0 KiB
C
196 lines
7.0 KiB
C
/*
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* Apple HTTP Live Streaming segmenter
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* Copyright (c) 2012, Luca Barbato
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* Copyright (c) 2017 Akamai Technologies, Inc.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include <stdint.h>
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#include "libavutil/time_internal.h"
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#include "avformat.h"
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#include "hlsplaylist.h"
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void ff_hls_write_playlist_version(AVIOContext *out, int version)
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{
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if (!out)
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return;
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avio_printf(out, "#EXTM3U\n");
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avio_printf(out, "#EXT-X-VERSION:%d\n", version);
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}
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void ff_hls_write_audio_rendition(AVIOContext *out, const char *agroup,
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const char *filename, const char *language,
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int name_id, int is_default)
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{
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if (!out || !agroup || !filename)
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return;
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avio_printf(out, "#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=\"group_%s\"", agroup);
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avio_printf(out, ",NAME=\"audio_%d\",DEFAULT=%s,", name_id, is_default ? "YES" : "NO");
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if (language) {
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avio_printf(out, "LANGUAGE=\"%s\",", language);
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}
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avio_printf(out, "URI=\"%s\"\n", filename);
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}
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void ff_hls_write_subtitle_rendition(AVIOContext *out, const char *sgroup,
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const char *filename, const char *language,
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int name_id, int is_default)
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{
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if (!out || !filename)
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return;
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avio_printf(out, "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"%s\"", sgroup);
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avio_printf(out, ",NAME=\"subtitle_%d\",DEFAULT=%s,", name_id, is_default ? "YES" : "NO");
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if (language) {
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avio_printf(out, "LANGUAGE=\"%s\",", language);
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}
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avio_printf(out, "URI=\"%s\"\n", filename);
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}
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void ff_hls_write_stream_info(AVStream *st, AVIOContext *out, int bandwidth,
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const char *filename, const char *agroup,
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const char *codecs, const char *ccgroup,
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const char *sgroup)
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{
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if (!out || !filename)
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return;
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if (!bandwidth) {
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av_log(NULL, AV_LOG_WARNING,
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"Bandwidth info not available, set audio and video bitrates\n");
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return;
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}
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avio_printf(out, "#EXT-X-STREAM-INF:BANDWIDTH=%d", bandwidth);
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if (st && st->codecpar->width > 0 && st->codecpar->height > 0)
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avio_printf(out, ",RESOLUTION=%dx%d", st->codecpar->width,
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st->codecpar->height);
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if (codecs && codecs[0])
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avio_printf(out, ",CODECS=\"%s\"", codecs);
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if (agroup && agroup[0])
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avio_printf(out, ",AUDIO=\"group_%s\"", agroup);
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if (ccgroup && ccgroup[0])
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avio_printf(out, ",CLOSED-CAPTIONS=\"%s\"", ccgroup);
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if (sgroup && sgroup[0])
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avio_printf(out, ",SUBTITLES=\"%s\"", sgroup);
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avio_printf(out, "\n%s\n\n", filename);
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}
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void ff_hls_write_playlist_header(AVIOContext *out, int version, int allowcache,
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int target_duration, int64_t sequence,
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uint32_t playlist_type, int iframe_mode)
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{
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if (!out)
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return;
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ff_hls_write_playlist_version(out, version);
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if (allowcache == 0 || allowcache == 1) {
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avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", allowcache == 0 ? "NO" : "YES");
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}
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avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
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avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
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av_log(NULL, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
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if (playlist_type == PLAYLIST_TYPE_EVENT) {
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avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
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} else if (playlist_type == PLAYLIST_TYPE_VOD) {
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avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
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}
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if (iframe_mode) {
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avio_printf(out, "#EXT-X-I-FRAMES-ONLY\n");
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}
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}
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void ff_hls_write_init_file(AVIOContext *out, const char *filename,
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int byterange_mode, int64_t size, int64_t pos)
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{
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avio_printf(out, "#EXT-X-MAP:URI=\"%s\"", filename);
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if (byterange_mode) {
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avio_printf(out, ",BYTERANGE=\"%"PRId64"@%"PRId64"\"", size, pos);
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}
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avio_printf(out, "\n");
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}
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int ff_hls_write_file_entry(AVIOContext *out, int insert_discont,
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int byterange_mode, double duration,
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int round_duration, int64_t size,
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int64_t pos /* Used only if HLS_SINGLE_FILE flag is set */,
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const char *baseurl /* Ignored if NULL */,
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const char *filename, double *prog_date_time,
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int64_t video_keyframe_size, int64_t video_keyframe_pos,
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int iframe_mode)
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{
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if (!out || !filename)
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return AVERROR(EINVAL);
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if (insert_discont) {
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avio_printf(out, "#EXT-X-DISCONTINUITY\n");
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}
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if (round_duration)
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avio_printf(out, "#EXTINF:%ld,\n", lrint(duration));
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else
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avio_printf(out, "#EXTINF:%f,\n", duration);
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if (byterange_mode)
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avio_printf(out, "#EXT-X-BYTERANGE:%"PRId64"@%"PRId64"\n", iframe_mode ? video_keyframe_size : size,
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iframe_mode ? video_keyframe_pos : pos);
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if (prog_date_time) {
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time_t tt, wrongsecs;
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int milli;
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struct tm *tm, tmpbuf;
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char buf0[128], buf1[128];
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tt = (int64_t)*prog_date_time;
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milli = av_clip(lrint(1000*(*prog_date_time - tt)), 0, 999);
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tm = localtime_r(&tt, &tmpbuf);
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if (!strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm)) {
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av_log(NULL, AV_LOG_DEBUG, "strftime error in ff_hls_write_file_entry\n");
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return AVERROR_UNKNOWN;
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}
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if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
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int tz_min, dst = tm->tm_isdst;
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tm = gmtime_r(&tt, &tmpbuf);
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tm->tm_isdst = dst;
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wrongsecs = mktime(tm);
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tz_min = (FFABS(wrongsecs - tt) + 30) / 60;
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snprintf(buf1, sizeof(buf1),
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"%c%02d%02d",
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wrongsecs <= tt ? '+' : '-',
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tz_min / 60,
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tz_min % 60);
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}
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avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
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*prog_date_time += duration;
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}
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if (baseurl)
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avio_printf(out, "%s", baseurl);
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avio_printf(out, "%s\n", filename);
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return 0;
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}
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void ff_hls_write_end_list(AVIOContext *out)
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{
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if (!out)
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return;
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avio_printf(out, "#EXT-X-ENDLIST\n");
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}
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