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c78a726717
FFmpeg/libavformat/hlsenc.c
Johan Ström 6c31c99289 hlsenc: add use_localtime_mkdir option to automatically create time-based directory 
Use with -use_localtime, and set -hls_segment_filename to a path which
contains a subdirectory i.e. /some/path/%Y%m%d/%Y%m%dT%H%M%S-%s.ts
This will mkdir the %Y%m%d-part of the path if it does not already
exist.
In addition, each filename in the playlist output will be prefixed with
this subdirectory (if playlist and segment shares the same base path).

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2016-02-17 16:17:58 +01:00

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/*
* Apple HTTP Live Streaming segmenter
* Copyright (c) 2012, Luca Barbato
*
* 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 <float.h>
#include <stdint.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "libavutil/parseutils.h"
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/log.h"
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "os_support.h"
#define KEYSIZE 16
#define LINE_BUFFER_SIZE 1024
typedef struct HLSSegment {
char filename[1024];
char sub_filename[1024];
double duration; /* in seconds */
int64_t pos;
int64_t size;
char key_uri[LINE_BUFFER_SIZE + 1];
char iv_string[KEYSIZE*2 + 1];
struct HLSSegment *next;
} HLSSegment;
typedef enum HLSFlags {
// Generate a single media file and use byte ranges in the playlist.
HLS_SINGLE_FILE = (1 << 0),
HLS_DELETE_SEGMENTS = (1 << 1),
HLS_ROUND_DURATIONS = (1 << 2),
HLS_DISCONT_START = (1 << 3),
HLS_OMIT_ENDLIST = (1 << 4),
} HLSFlags;
typedef struct HLSContext {
const AVClass *class; // Class for private options.
unsigned number;
int64_t sequence;
int64_t start_sequence;
AVOutputFormat *oformat;
AVOutputFormat *vtt_oformat;
AVFormatContext *avf;
AVFormatContext *vtt_avf;
float time; // Set by a private option.
int max_nb_segments; // Set by a private option.
int wrap; // Set by a private option.
uint32_t flags; // enum HLSFlags
char *segment_filename;
int use_localtime; ///< flag to expand filename with localtime
int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
int allowcache;
int64_t recording_time;
int has_video;
int has_subtitle;
int64_t start_pts;
int64_t end_pts;
double duration; // last segment duration computed so far, in seconds
int64_t start_pos; // last segment starting position
int64_t size; // last segment size
int nb_entries;
int discontinuity_set;
HLSSegment *segments;
HLSSegment *last_segment;
HLSSegment *old_segments;
char *basename;
char *vtt_basename;
char *vtt_m3u8_name;
char *baseurl;
char *format_options_str;
char *vtt_format_options_str;
char *subtitle_filename;
AVDictionary *format_options;
char *key_info_file;
char key_file[LINE_BUFFER_SIZE + 1];
char key_uri[LINE_BUFFER_SIZE + 1];
char key_string[KEYSIZE*2 + 1];
char iv_string[KEYSIZE*2 + 1];
AVDictionary *vtt_format_options;
char *method;
} HLSContext;
static int hls_delete_old_segments(HLSContext *hls) {
HLSSegment *segment, *previous_segment = NULL;
float playlist_duration = 0.0f;
int ret = 0, path_size, sub_path_size;
char *dirname = NULL, *p, *sub_path;
char *path = NULL;
segment = hls->segments;
while (segment) {
playlist_duration += segment->duration;
segment = segment->next;
}
segment = hls->old_segments;
while (segment) {
playlist_duration -= segment->duration;
previous_segment = segment;
segment = previous_segment->next;
if (playlist_duration <= -previous_segment->duration) {
previous_segment->next = NULL;
break;
}
}
if (segment) {
if (hls->segment_filename) {
dirname = av_strdup(hls->segment_filename);
} else {
dirname = av_strdup(hls->avf->filename);
}
if (!dirname) {
ret = AVERROR(ENOMEM);
goto fail;
}
p = (char *)av_basename(dirname);
*p = '\0';
}
while (segment) {
av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
segment->filename);
path_size = strlen(dirname) + strlen(segment->filename) + 1;
path = av_malloc(path_size);
if (!path) {
ret = AVERROR(ENOMEM);
goto fail;
}
av_strlcpy(path, dirname, path_size);
av_strlcat(path, segment->filename, path_size);
if (unlink(path) < 0) {
av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
path, strerror(errno));
}
if (segment->sub_filename[0] != '\0') {
sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
sub_path = av_malloc(sub_path_size);
if (!sub_path) {
ret = AVERROR(ENOMEM);
goto fail;
}
av_strlcpy(sub_path, dirname, sub_path_size);
av_strlcat(sub_path, segment->sub_filename, sub_path_size);
if (unlink(sub_path) < 0) {
av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
sub_path, strerror(errno));
}
av_free(sub_path);
}
av_freep(&path);
previous_segment = segment;
segment = previous_segment->next;
av_free(previous_segment);
}
fail:
av_free(path);
av_free(dirname);
return ret;
}
static int hls_encryption_start(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
int ret;
AVIOContext *pb;
uint8_t key[KEYSIZE];
if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
av_log(hls, AV_LOG_ERROR,
"error opening key info file %s\n", hls->key_info_file);
return ret;
}
ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
ff_format_io_close(s, &pb);
if (!*hls->key_uri) {
av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*hls->key_file) {
av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
return AVERROR(EINVAL);
}
if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
return ret;
}
ret = avio_read(pb, key, sizeof(key));
ff_format_io_close(s, &pb);
if (ret != sizeof(key)) {
av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
if (ret >= 0 || ret == AVERROR_EOF)
ret = AVERROR(EINVAL);
return ret;
}
ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
return 0;
}
static int hls_mux_init(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
AVFormatContext *oc;
AVFormatContext *vtt_oc = NULL;
int i, ret;
ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
if (ret < 0)
return ret;
oc = hls->avf;
oc->oformat = hls->oformat;
oc->interrupt_callback = s->interrupt_callback;
oc->max_delay = s->max_delay;
oc->opaque = s->opaque;
oc->io_open = s->io_open;
oc->io_close = s->io_close;
av_dict_copy(&oc->metadata, s->metadata, 0);
if(hls->vtt_oformat) {
ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
if (ret < 0)
return ret;
vtt_oc = hls->vtt_avf;
vtt_oc->oformat = hls->vtt_oformat;
av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
}
for (i = 0; i < s->nb_streams; i++) {
AVStream *st;
AVFormatContext *loc;
if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
loc = vtt_oc;
else
loc = oc;
if (!(st = avformat_new_stream(loc, NULL)))
return AVERROR(ENOMEM);
avcodec_copy_context(st->codec, s->streams[i]->codec);
st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
st->time_base = s->streams[i]->time_base;
}
hls->start_pos = 0;
return 0;
}
/* Create a new segment and append it to the segment list */
static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
int64_t pos, int64_t size)
{
HLSSegment *en = av_malloc(sizeof(*en));
char *tmp, *p;
const char *pl_dir, *filename;
int ret;
if (!en)
return AVERROR(ENOMEM);
filename = av_basename(hls->avf->filename);
if (hls->use_localtime_mkdir) {
/* Possibly prefix with mkdir'ed subdir, if playlist share same
* base path. */
tmp = av_strdup(s->filename);
if (!tmp) {
av_free(en);
return AVERROR(ENOMEM);
}
pl_dir = av_dirname(tmp);
p = hls->avf->filename;
if (strstr(p, pl_dir) == p)
filename = hls->avf->filename + strlen(pl_dir) + 1;
av_free(tmp);
}
av_strlcpy(en->filename, filename, sizeof(en->filename));
if(hls->has_subtitle)
av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
else
en->sub_filename[0] = '\0';
en->duration = duration;
en->pos = pos;
en->size = size;
en->next = NULL;
if (hls->key_info_file) {
av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
}
if (!hls->segments)
hls->segments = en;
else
hls->last_segment->next = en;
hls->last_segment = en;
if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
en = hls->segments;
hls->segments = en->next;
if (en && hls->flags & HLS_DELETE_SEGMENTS &&
!(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
en->next = hls->old_segments;
hls->old_segments = en;
if ((ret = hls_delete_old_segments(hls)) < 0)
return ret;
} else
av_free(en);
} else
hls->nb_entries++;
hls->sequence++;
return 0;
}
static void hls_free_segments(HLSSegment *p)
{
HLSSegment *en;
while(p) {
en = p;
p = p->next;
av_free(en);
}
}
static void set_http_options(AVDictionary **options, HLSContext *c)
{
if (c->method)
av_dict_set(options, "method", c->method, 0);
}
static int hls_window(AVFormatContext *s, int last)
{
HLSContext *hls = s->priv_data;
HLSSegment *en;
int target_duration = 0;
int ret = 0;
AVIOContext *out = NULL;
AVIOContext *sub_out = NULL;
char temp_filename[1024];
int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
const char *proto = avio_find_protocol_name(s->filename);
int use_rename = proto && !strcmp(proto, "file");
static unsigned warned_non_file;
char *key_uri = NULL;
char *iv_string = NULL;
AVDictionary *options = NULL;
if (!use_rename && !warned_non_file++)
av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
set_http_options(&options, hls);
snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL)) < 0)
goto fail;
for (en = hls->segments; en; en = en->next) {
if (target_duration < en->duration)
target_duration = ceil(en->duration);
}
hls->discontinuity_set = 0;
avio_printf(out, "#EXTM3U\n");
avio_printf(out, "#EXT-X-VERSION:%d\n", version);
if (hls->allowcache == 0 || hls->allowcache == 1) {
avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->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(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
sequence);
if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
avio_printf(out, "#EXT-X-DISCONTINUITY\n");
hls->discontinuity_set = 1;
}
for (en = hls->segments; en; en = en->next) {
if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
av_strcasecmp(en->iv_string, iv_string))) {
avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
if (*en->iv_string)
avio_printf(out, ",IV=0x%s", en->iv_string);
avio_printf(out, "\n");
key_uri = en->key_uri;
iv_string = en->iv_string;
}
if (hls->flags & HLS_ROUND_DURATIONS)
avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
else
avio_printf(out, "#EXTINF:%f,\n", en->duration);
if (hls->flags & HLS_SINGLE_FILE)
avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
en->size, en->pos);
if (hls->baseurl)
avio_printf(out, "%s", hls->baseurl);
avio_printf(out, "%s\n", en->filename);
}
if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
avio_printf(out, "#EXT-X-ENDLIST\n");
if( hls->vtt_m3u8_name ) {
if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
avio_printf(sub_out, "#EXTM3U\n");
avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
if (hls->allowcache == 0 || hls->allowcache == 1) {
avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
}
avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
sequence);
for (en = hls->segments; en; en = en->next) {
avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
if (hls->flags & HLS_SINGLE_FILE)
avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
en->size, en->pos);
if (hls->baseurl)
avio_printf(sub_out, "%s", hls->baseurl);
avio_printf(sub_out, "%s\n", en->sub_filename);
}
if (last)
avio_printf(sub_out, "#EXT-X-ENDLIST\n");
}
fail:
av_dict_free(&options);
ff_format_io_close(s, &out);
ff_format_io_close(s, &sub_out);
if (ret >= 0 && use_rename)
ff_rename(temp_filename, s->filename, s);
return ret;
}
static int hls_start(AVFormatContext *s)
{
HLSContext *c = s->priv_data;
AVFormatContext *oc = c->avf;
AVFormatContext *vtt_oc = c->vtt_avf;
AVDictionary *options = NULL;
char *filename, iv_string[KEYSIZE*2 + 1];
int err = 0;
if (c->flags & HLS_SINGLE_FILE) {
av_strlcpy(oc->filename, c->basename,
sizeof(oc->filename));
if (c->vtt_basename)
av_strlcpy(vtt_oc->filename, c->vtt_basename,
sizeof(vtt_oc->filename));
} else {
if (c->use_localtime) {
time_t now0;
struct tm *tm, tmpbuf;
time(&now0);
tm = localtime_r(&now0, &tmpbuf);
if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
return AVERROR(EINVAL);
}
if (c->use_localtime_mkdir) {
const char *dir;
char *fn_copy = av_strdup(oc->filename);
if (!fn_copy) {
return AVERROR(ENOMEM);
}
dir = av_dirname(fn_copy);
if (mkdir(dir, 0777) == -1 && errno != EEXIST) {
av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
av_free(fn_copy);
return AVERROR(errno);
}
av_free(fn_copy);
}
} else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
return AVERROR(EINVAL);
}
if( c->vtt_basename) {
if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
return AVERROR(EINVAL);
}
}
}
c->number++;
set_http_options(&options, c);
if (c->key_info_file) {
if ((err = hls_encryption_start(s)) < 0)
goto fail;
if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
< 0)
goto fail;
err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
if (!err)
snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
goto fail;
filename = av_asprintf("crypto:%s", oc->filename);
if (!filename) {
err = AVERROR(ENOMEM);
goto fail;
}
err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
av_free(filename);
av_dict_free(&options);
if (err < 0)
return err;
} else
if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
if (c->vtt_basename) {
set_http_options(&options, c);
if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
}
av_dict_free(&options);
/* We only require one PAT/PMT per segment. */
if (oc->oformat->priv_class && oc->priv_data) {
char period[21];
snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
av_opt_set(oc->priv_data, "sdt_period", period, 0);
av_opt_set(oc->priv_data, "pat_period", period, 0);
}
if (c->vtt_basename) {
err = avformat_write_header(vtt_oc,NULL);
if (err < 0)
return err;
}
return 0;
fail:
av_dict_free(&options);
return err;
}
static int hls_write_header(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
int ret, i;
char *p;
const char *pattern = "%d.ts";
const char *pattern_localtime_fmt = "-%s.ts";
const char *vtt_pattern = "%d.vtt";
AVDictionary *options = NULL;
int basename_size;
int vtt_basename_size;
hls->sequence = hls->start_sequence;
hls->recording_time = hls->time * AV_TIME_BASE;
hls->start_pts = AV_NOPTS_VALUE;
if (hls->format_options_str) {
ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
goto fail;
}
}
for (i = 0; i < s->nb_streams; i++) {
hls->has_video +=
s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO;
hls->has_subtitle +=
s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE;
}
if (hls->has_video > 1)
av_log(s, AV_LOG_WARNING,
"More than a single video stream present, "
"expect issues decoding it.\n");
hls->oformat = av_guess_format("mpegts", NULL, NULL);
if (!hls->oformat) {
ret = AVERROR_MUXER_NOT_FOUND;
goto fail;
}
if(hls->has_subtitle) {
hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
if (!hls->oformat) {
ret = AVERROR_MUXER_NOT_FOUND;
goto fail;
}
}
if (hls->segment_filename) {
hls->basename = av_strdup(hls->segment_filename);
if (!hls->basename) {
ret = AVERROR(ENOMEM);
goto fail;
}
} else {
if (hls->flags & HLS_SINGLE_FILE)
pattern = ".ts";
if (hls->use_localtime) {
basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
} else {
basename_size = strlen(s->filename) + strlen(pattern) + 1;
}
hls->basename = av_malloc(basename_size);
if (!hls->basename) {
ret = AVERROR(ENOMEM);
goto fail;
}
av_strlcpy(hls->basename, s->filename, basename_size);
p = strrchr(hls->basename, '.');
if (p)
*p = '\0';
if (hls->use_localtime) {
av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
} else {
av_strlcat(hls->basename, pattern, basename_size);
}
}
if(hls->has_subtitle) {
if (hls->flags & HLS_SINGLE_FILE)
vtt_pattern = ".vtt";
vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
hls->vtt_basename = av_malloc(vtt_basename_size);
if (!hls->vtt_basename) {
ret = AVERROR(ENOMEM);
goto fail;
}
hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
if (!hls->vtt_m3u8_name ) {
ret = AVERROR(ENOMEM);
goto fail;
}
av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
p = strrchr(hls->vtt_basename, '.');
if (p)
*p = '\0';
if( hls->subtitle_filename ) {
strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
} else {
strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
}
av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
}
if ((ret = hls_mux_init(s)) < 0)
goto fail;
if ((ret = hls_start(s)) < 0)
goto fail;
av_dict_copy(&options, hls->format_options, 0);
ret = avformat_write_header(hls->avf, &options);
if (av_dict_count(options)) {
av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
ret = AVERROR(EINVAL);
goto fail;
}
//av_assert0(s->nb_streams == hls->avf->nb_streams);
for (i = 0; i < s->nb_streams; i++) {
AVStream *inner_st;
AVStream *outer_st = s->streams[i];
if (outer_st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
inner_st = hls->avf->streams[i];
else if (hls->vtt_avf)
inner_st = hls->vtt_avf->streams[0];
else {
/* We have a subtitle stream, when the user does not want one */
inner_st = NULL;
continue;
}
avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
}
fail:
av_dict_free(&options);
if (ret < 0) {
av_freep(&hls->basename);
av_freep(&hls->vtt_basename);
if (hls->avf)
avformat_free_context(hls->avf);
if (hls->vtt_avf)
avformat_free_context(hls->vtt_avf);
}
return ret;
}
static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
{
HLSContext *hls = s->priv_data;
AVFormatContext *oc = NULL;
AVStream *st = s->streams[pkt->stream_index];
int64_t end_pts = hls->recording_time * hls->number;
int is_ref_pkt = 1;
int ret, can_split = 1;
int stream_index = 0;
if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
oc = hls->vtt_avf;
stream_index = 0;
} else {
oc = hls->avf;
stream_index = pkt->stream_index;
}
if (hls->start_pts == AV_NOPTS_VALUE) {
hls->start_pts = pkt->pts;
hls->end_pts = pkt->pts;
}
if (hls->has_video) {
can_split = st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
pkt->flags & AV_PKT_FLAG_KEY;
is_ref_pkt = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
}
if (pkt->pts == AV_NOPTS_VALUE)
is_ref_pkt = can_split = 0;
if (is_ref_pkt)
hls->duration = (double)(pkt->pts - hls->end_pts)
* st->time_base.num / st->time_base.den;
if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
end_pts, AV_TIME_BASE_Q) >= 0) {
int64_t new_start_pos;
av_write_frame(oc, NULL); /* Flush any buffered data */
new_start_pos = avio_tell(hls->avf->pb);
hls->size = new_start_pos - hls->start_pos;
ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
hls->start_pos = new_start_pos;
if (ret < 0)
return ret;
hls->end_pts = pkt->pts;
hls->duration = 0;
if (hls->flags & HLS_SINGLE_FILE) {
if (hls->avf->oformat->priv_class && hls->avf->priv_data)
av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
hls->number++;
} else {
ff_format_io_close(s, &oc->pb);
if (hls->vtt_avf)
ff_format_io_close(s, &hls->vtt_avf->pb);
ret = hls_start(s);
}
if (ret < 0)
return ret;
if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE )
oc = hls->vtt_avf;
else
oc = hls->avf;
if ((ret = hls_window(s, 0)) < 0)
return ret;
}
ret = ff_write_chained(oc, stream_index, pkt, s, 0);
return ret;
}
static int hls_write_trailer(struct AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
AVFormatContext *oc = hls->avf;
AVFormatContext *vtt_oc = hls->vtt_avf;
av_write_trailer(oc);
if (oc->pb) {
hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
ff_format_io_close(s, &oc->pb);
hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
}
if (vtt_oc) {
if (vtt_oc->pb)
av_write_trailer(vtt_oc);
hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
ff_format_io_close(s, &vtt_oc->pb);
}
av_freep(&hls->basename);
avformat_free_context(oc);
if (vtt_oc) {
av_freep(&hls->vtt_basename);
av_freep(&hls->vtt_m3u8_name);
avformat_free_context(vtt_oc);
}
hls->avf = NULL;
hls_window(s, 1);
hls_free_segments(hls->segments);
hls_free_segments(hls->old_segments);
return 0;
}
#define OFFSET(x) offsetof(HLSContext, x)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
{"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
{"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
{"hls_ts_options","set hls mpegts list of options for the container format used for hls", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_vtt_options","set hls vtt list of options for the container format used for hls", OFFSET(vtt_format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
{"hls_allow_cache", "explicitly set whether the client MAY (1) or MUST NOT (0) cache media segments", OFFSET(allowcache), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, E},
{"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_key_info_file", "file with key URI and key file path", OFFSET(key_info_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
{"single_file", "generate a single media file indexed with byte ranges", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SINGLE_FILE }, 0, UINT_MAX, E, "flags"},
{"delete_segments", "delete segment files that are no longer part of the playlist", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DELETE_SEGMENTS }, 0, UINT_MAX, E, "flags"},
{"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
{"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
{"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
{"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{ NULL },
};
static const AVClass hls_class = {
.class_name = "hls muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_hls_muxer = {
.name = "hls",
.long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
.extensions = "m3u8",
.priv_data_size = sizeof(HLSContext),
.audio_codec = AV_CODEC_ID_AAC,
.video_codec = AV_CODEC_ID_H264,
.subtitle_codec = AV_CODEC_ID_WEBVTT,
.flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
.write_header = hls_write_header,
.write_packet = hls_write_packet,
.write_trailer = hls_write_trailer,
.priv_class = &hls_class,
};
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