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606eac7b07
ffmpeg/libavformat/hlsenc.c
Aman Gupta 606eac7b07 avformat/hlsenc: add hls_flag option to write segments to temporary file until complete 
Adds a `-hls_flags +temp_file` which will write segment data to
filename.tmp, and then rename to filename when the segment is complete.

This patch is similar in spirit to one used in Plex's ffmpeg fork, and
allows a transcoding webserver to ensure incomplete segment files are
never served up accidentally.

Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Reviewed-by: Bodecs Bela <bodecsb@vivanet.hu>
Signed-off-by: Aman Gupta <aman@tmm1.net>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
2017-02-07 11:58:43 +08:00

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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"
typedef enum {
HLS_START_SEQUENCE_AS_START_NUMBER = 0,
HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH = 1,
HLS_START_SEQUENCE_AS_FORMATTED_DATETIME = 2, // YYYYMMDDhhmmss
} StartSequenceSourceType;
#define KEYSIZE 16
#define LINE_BUFFER_SIZE 1024
#define HLS_MICROSECOND_UNIT 1000000
typedef struct HLSSegment {
char filename[1024];
char sub_filename[1024];
double duration; /* in seconds */
int discont;
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),
HLS_SPLIT_BY_TIME = (1 << 5),
HLS_APPEND_LIST = (1 << 6),
HLS_PROGRAM_DATE_TIME = (1 << 7),
HLS_SECOND_LEVEL_SEGMENT_INDEX = (1 << 8), // include segment index in segment filenames when use_localtime e.g.: %%03d
HLS_SECOND_LEVEL_SEGMENT_DURATION = (1 << 9), // include segment duration (microsec) in segment filenames when use_localtime e.g.: %%09t
HLS_SECOND_LEVEL_SEGMENT_SIZE = (1 << 10), // include segment size (bytes) in segment filenames when use_localtime e.g.: %%014s
HLS_TEMP_FILE = (1 << 11),
} HLSFlags;
typedef enum {
PLAYLIST_TYPE_NONE,
PLAYLIST_TYPE_EVENT,
PLAYLIST_TYPE_VOD,
PLAYLIST_TYPE_NB,
} PlaylistType;
typedef struct HLSContext {
const AVClass *class; // Class for private options.
unsigned number;
int64_t sequence;
int64_t start_sequence;
uint32_t start_sequence_source_type; // enum StartSequenceSourceType
AVOutputFormat *oformat;
AVOutputFormat *vtt_oformat;
AVFormatContext *avf;
AVFormatContext *vtt_avf;
float time; // Set by a private option.
float init_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
uint32_t pl_type; // enum PlaylistType
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;
int new_start;
double dpp; // duration per packet
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
int64_t max_seg_size; // every segment file max size
int nb_entries;
int discontinuity_set;
int discontinuity;
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;
double initial_prog_date_time;
char current_segment_final_filename_fmt[1024]; // when renaming segments
} HLSContext;
static int get_int_from_double(double val)
{
return (int)((val - (int)val) >= 0.001) ? (int)(val + 1) : (int)val;
}
static int mkdir_p(const char *path) {
int ret = 0;
char *temp = av_strdup(path);
char *pos = temp;
char tmp_ch = '\0';
if (!path || !temp) {
return -1;
}
if (!strncmp(temp, "/", 1) || !strncmp(temp, "\\", 1)) {
pos++;
} else if (!strncmp(temp, "./", 2) || !strncmp(temp, ".\\", 2)) {
pos += 2;
}
for ( ; *pos != '\0'; ++pos) {
if (*pos == '/' || *pos == '\\') {
tmp_ch = *pos;
*pos = '\0';
ret = mkdir(temp, 0755);
*pos = tmp_ch;
}
}
if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
ret = mkdir(temp, 0755);
}
av_free(temp);
return ret;
}
static int replace_int_data_in_filename(char *buf, int buf_size, const char *filename, char placeholder, int64_t number)
{
const char *p;
char *q, buf1[20], c;
int nd, len, addchar_count;
int found_count = 0;
q = buf;
p = filename;
for (;;) {
c = *p;
if (c == '\0')
break;
if (c == '%' && *(p+1) == '%') // %%
addchar_count = 2;
else if (c == '%' && (av_isdigit(*(p+1)) || *(p+1) == placeholder)) {
nd = 0;
addchar_count = 1;
while (av_isdigit(*(p + addchar_count))) {
nd = nd * 10 + *(p + addchar_count) - '0';
addchar_count++;
}
if (*(p + addchar_count) == placeholder) {
len = snprintf(buf1, sizeof(buf1), "%0*"PRId64, (number < 0) ? nd : nd++, number);
if (len < 1) // returned error or empty buf1
goto fail;
if ((q - buf + len) > buf_size - 1)
goto fail;
memcpy(q, buf1, len);
q += len;
p += (addchar_count + 1);
addchar_count = 0;
found_count++;
}
} else
addchar_count = 1;
while (addchar_count--)
if ((q - buf) < buf_size - 1)
*q++ = *p++;
else
goto fail;
}
*q = '\0';
return found_count;
fail:
*q = '\0';
return -1;
}
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;
AVDictionary *options = NULL;
AVIOContext *out = 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 && !hls->use_localtime_mkdir) {
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 = (hls->use_localtime_mkdir ? 0 : strlen(dirname)) + strlen(segment->filename) + 1;
path = av_malloc(path_size);
if (!path) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (hls->use_localtime_mkdir)
av_strlcpy(path, segment->filename, path_size);
else { // segment->filename contains basename only
av_strlcpy(path, dirname, path_size);
av_strlcat(path, segment->filename, path_size);
}
if (hls->method) {
av_dict_set(&options, "method", "DELETE", 0);
if ((ret = hls->avf->io_open(hls->avf, &out, path, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
ff_format_io_close(hls->avf, &out);
} else 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(segment->sub_filename) + 1 + (dirname ? strlen(dirname) : 0);
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 (hls->method) {
av_dict_set(&options, "method", "DELETE", 0);
if ((ret = hls->avf->io_open(hls->avf, &out, sub_path, AVIO_FLAG_WRITE, &options)) < 0) {
av_free(sub_path);
goto fail;
}
ff_format_io_close(hls->avf, &out);
} else 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 read_chomp_line(AVIOContext *s, char *buf, int maxlen)
{
int len = ff_get_line(s, buf, maxlen);
while (len > 0 && av_isspace(buf[len - 1]))
buf[--len] = '\0';
return len;
}
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->filename[0] = '\0';
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]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
loc = vtt_oc;
else
loc = oc;
if (!(st = avformat_new_stream(loc, NULL)))
return AVERROR(ENOMEM);
avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
st->time_base = s->streams[i]->time_base;
}
hls->start_pos = 0;
hls->new_start = 1;
return 0;
}
static HLSSegment *find_segment_by_filename(HLSSegment *segment, const char *filename)
{
while (segment) {
if (!av_strcasecmp(segment->filename,filename))
return segment;
segment = segment->next;
}
return (HLSSegment *) NULL;
}
/* 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));
const char *filename;
int ret;
if (!en)
return AVERROR(ENOMEM);
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(hls->current_segment_final_filename_fmt)) {
av_strlcpy(hls->avf->filename, hls->current_segment_final_filename_fmt, sizeof(hls->avf->filename));
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
char * filename = av_strdup(hls->avf->filename); // %%s will be %s after strftime
if (!filename) {
av_free(en);
return AVERROR(ENOMEM);
}
if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
filename, 's', pos + size) < 1) {
av_log(hls, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_size flag\n",
filename);
av_free(filename);
av_free(en);
return AVERROR(EINVAL);
}
av_free(filename);
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
char * filename = av_strdup(hls->avf->filename); // %%t will be %t after strftime
if (!filename) {
av_free(en);
return AVERROR(ENOMEM);
}
if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
filename, 't', (int64_t)round(duration * HLS_MICROSECOND_UNIT)) < 1) {
av_log(hls, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_time flag\n",
filename);
av_free(filename);
av_free(en);
return AVERROR(EINVAL);
}
av_free(filename);
}
}
filename = av_basename(hls->avf->filename);
if (hls->use_localtime_mkdir) {
filename = hls->avf->filename;
}
if (find_segment_by_filename(hls->segments, filename)
|| find_segment_by_filename(hls->old_segments, filename)) {
av_log(hls, AV_LOG_WARNING, "Duplicated segment filename detected: %s\n", filename);
}
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;
en->discont = 0;
if (hls->discontinuity) {
en->discont = 1;
hls->discontinuity = 0;
}
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;
// EVENT or VOD playlists imply sliding window cannot be used
if (hls->pl_type != PLAYLIST_TYPE_NONE)
hls->max_nb_segments = 0;
if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
en = hls->segments;
hls->initial_prog_date_time += en->duration;
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++;
if (hls->max_seg_size > 0) {
return 0;
}
hls->sequence++;
return 0;
}
static int parse_playlist(AVFormatContext *s, const char *url)
{
HLSContext *hls = s->priv_data;
AVIOContext *in;
int ret = 0, is_segment = 0;
int64_t new_start_pos;
char line[1024];
const char *ptr;
if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
&s->interrupt_callback, NULL,
s->protocol_whitelist, s->protocol_blacklist)) < 0)
return ret;
read_chomp_line(in, line, sizeof(line));
if (strcmp(line, "#EXTM3U")) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
hls->discontinuity = 0;
while (!avio_feof(in)) {
read_chomp_line(in, line, sizeof(line));
if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
int64_t tmp_sequence = strtoll(ptr, NULL, 10);
if (tmp_sequence < hls->sequence)
av_log(hls, AV_LOG_VERBOSE,
"Found playlist sequence number was smaller """
"than specified start sequence number: %"PRId64" < %"PRId64", "
"omitting\n", tmp_sequence, hls->start_sequence);
else {
av_log(hls, AV_LOG_DEBUG, "Found playlist sequence number: %"PRId64"\n", tmp_sequence);
hls->sequence = tmp_sequence;
}
} else if (av_strstart(line, "#EXT-X-DISCONTINUITY", &ptr)) {
is_segment = 1;
hls->discontinuity = 1;
} else if (av_strstart(line, "#EXTINF:", &ptr)) {
is_segment = 1;
hls->duration = atof(ptr);
} else if (av_strstart(line, "#", NULL)) {
continue;
} else if (line[0]) {
if (is_segment) {
is_segment = 0;
new_start_pos = avio_tell(hls->avf->pb);
hls->size = new_start_pos - hls->start_pos;
av_strlcpy(hls->avf->filename, line, sizeof(line));
ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
if (ret < 0)
goto fail;
hls->start_pos = new_start_pos;
}
}
}
fail:
avio_close(in);
return ret;
}
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 void write_m3u8_head_block(HLSContext *hls, AVIOContext *out, int version,
int target_duration, int64_t sequence)
{
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(hls, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
}
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 = 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;
double prog_date_time = hls->initial_prog_date_time;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
if (byterange_mode) {
version = 4;
sequence = 0;
}
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 temporary 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, &options)) < 0)
goto fail;
for (en = hls->segments; en; en = en->next) {
if (target_duration <= en->duration)
target_duration = get_int_from_double(en->duration);
}
hls->discontinuity_set = 0;
write_m3u8_head_block(hls, out, version, target_duration, sequence);
if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
} else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
}
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 (en->discont) {
avio_printf(out, "#EXT-X-DISCONTINUITY\n");
}
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 (byterange_mode)
avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
en->size, en->pos);
if (hls->flags & HLS_PROGRAM_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);
strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
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 = (abs(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 += en->duration;
}
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;
write_m3u8_head_block(hls, sub_out, version, target_duration, sequence);
for (en = hls->segments; en; en = en->next) {
avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
if (byterange_mode)
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_TEMP_FILE) && oc->filename[0] != 0) {
size_t len = strlen(oc->filename);
char final_filename[sizeof(oc->filename)];
av_strlcpy(final_filename, oc->filename, len);
final_filename[len-4] = '\0';
ff_rename(oc->filename, final_filename, s);
oc->filename[len-4] = '\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->max_seg_size > 0) {
if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s', you can try to use -use_localtime 1 with it\n", c->basename);
return AVERROR(EINVAL);
}
} 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->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
char * filename = av_strdup(oc->filename); // %%d will be %d after strftime
if (!filename)
return AVERROR(ENOMEM);
if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
filename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
av_log(c, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_index flag\n",
filename);
av_free(filename);
return AVERROR(EINVAL);
}
av_free(filename);
}
if (c->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) {
av_strlcpy(c->current_segment_final_filename_fmt, oc->filename,
sizeof(c->current_segment_final_filename_fmt));
if (c->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
char * filename = av_strdup(oc->filename); // %%s will be %s after strftime
if (!filename)
return AVERROR(ENOMEM);
if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 's', 0) < 1) {
av_log(c, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_size flag\n",
filename);
av_free(filename);
return AVERROR(EINVAL);
}
av_free(filename);
}
if (c->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
char * filename = av_strdup(oc->filename); // %%t will be %t after strftime
if (!filename)
return AVERROR(ENOMEM);
if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 't', 0) < 1) {
av_log(c, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_time flag\n",
filename);
av_free(filename);
return AVERROR(EINVAL);
}
av_free(filename);
}
}
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_p(dir) == -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 (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try to use -use_localtime 1 with it\n", c->basename);
return AVERROR(EINVAL);
}
if( c->vtt_basename) {
if (replace_int_data_in_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
c->vtt_basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
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->flags & HLS_TEMP_FILE) {
av_strlcat(oc->filename, ".tmp", sizeof(oc->filename));
}
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 const char * get_default_pattern_localtime_fmt(void)
{
char b[21];
time_t t = time(NULL);
struct tm *p, tmbuf;
p = localtime_r(&t, &tmbuf);
// no %s support when strftime returned error or left format string unchanged
return (!strftime(b, sizeof(b), "%s", p) || !strcmp(b, "%s")) ? "-%Y%m%d%H%M%S.ts" : "-%s.ts";
}
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 = get_default_pattern_localtime_fmt();
const char *vtt_pattern = "%d.vtt";
AVDictionary *options = NULL;
int basename_size;
int vtt_basename_size;
if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH || hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
time_t t = time(NULL); // we will need it in either case
if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) {
hls->start_sequence = (int64_t)t;
} else if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
char b[15];
struct tm *p, tmbuf;
if (!(p = localtime_r(&t, &tmbuf)))
return AVERROR(ENOMEM);
if (!strftime(b, sizeof(b), "%Y%m%d%H%M%S", p))
return AVERROR(ENOMEM);
hls->start_sequence = strtoll(b, NULL, 10);
}
av_log(hls, AV_LOG_DEBUG, "start_number evaluated to %"PRId64"\n", hls->start_sequence);
}
hls->sequence = hls->start_sequence;
hls->recording_time = (hls->init_time ? hls->init_time : hls->time) * AV_TIME_BASE;
hls->start_pts = AV_NOPTS_VALUE;
hls->current_segment_final_filename_fmt[0] = '\0';
if (hls->flags & HLS_PROGRAM_DATE_TIME) {
time_t now0;
time(&now0);
hls->initial_prog_date_time = now0;
}
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]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
hls->has_subtitle +=
s->streams[i]->codecpar->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->use_localtime) {
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_duration hls_flag requires use_localtime to be true\n");
ret = AVERROR(EINVAL);
goto fail;
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_size hls_flag requires use_localtime to be true\n");
ret = AVERROR(EINVAL);
goto fail;
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_index hls_flag requires use_localtime to be true\n");
ret = AVERROR(EINVAL);
goto fail;
}
} else {
const char *proto = avio_find_protocol_name(hls->basename);
int segment_renaming_ok = proto && !strcmp(proto, "file");
if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) && !segment_renaming_ok) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_duration hls_flag works only with file protocol segment names\n");
ret = AVERROR(EINVAL);
goto fail;
}
if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) && !segment_renaming_ok) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_size hls_flag works only with file protocol segment names\n");
ret = AVERROR(EINVAL);
goto fail;
}
}
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 (hls->flags & HLS_APPEND_LIST) {
parse_playlist(s, s->filename);
hls->discontinuity = 1;
if (hls->init_time > 0) {
av_log(s, AV_LOG_WARNING, "append_list mode does not support hls_init_time,"
" hls_init_time value will have no effect\n");
hls->init_time = 0;
hls->recording_time = hls->time * AV_TIME_BASE;
}
}
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 (hls->max_seg_size > 0) {
if ((outer_st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
(outer_st->codecpar->bit_rate > hls->max_seg_size)) {
av_log(s, AV_LOG_WARNING, "Your video bitrate is bigger than hls_segment_size, "
"(%"PRId64 " > %"PRId64 "), the result maybe not be what you want.",
outer_st->codecpar->bit_rate, hls->max_seg_size);
}
}
if (outer_st->codecpar->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 (hls->sequence - hls->nb_entries > hls->start_sequence && hls->init_time > 0) {
/* reset end_pts, hls->recording_time at end of the init hls list */
int init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
int after_init_list_dur = (hls->sequence - hls->nb_entries ) * hls->time * AV_TIME_BASE;
hls->recording_time = hls->time * AV_TIME_BASE;
end_pts = init_list_dur + after_init_list_dur ;
}
if( st->codecpar->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->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
}
if (pkt->pts == AV_NOPTS_VALUE)
is_ref_pkt = can_split = 0;
if (is_ref_pkt) {
if (hls->new_start) {
hls->new_start = 0;
hls->duration = (double)(pkt->pts - hls->end_pts)
* st->time_base.num / st->time_base.den;
hls->dpp = (double)(pkt->duration) * st->time_base.num / st->time_base.den;
} else {
hls->duration += (double)(pkt->duration) * 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;
char *old_filename = av_strdup(hls->avf->filename);
if (!old_filename) {
return AVERROR(ENOMEM);
}
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) {
av_free(old_filename);
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 if (hls->max_seg_size > 0) {
if (hls->avf->oformat->priv_class && hls->avf->priv_data)
av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
if (hls->start_pos >= hls->max_seg_size) {
hls->sequence++;
ff_format_io_close(s, &oc->pb);
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(hls->current_segment_final_filename_fmt)) {
ff_rename(old_filename, hls->avf->filename, hls);
}
if (hls->vtt_avf)
ff_format_io_close(s, &hls->vtt_avf->pb);
ret = hls_start(s);
hls->start_pos = 0;
/* When split segment by byte, the duration is short than hls_time,
* so it is not enough one segment duration as hls_time, */
hls->number--;
}
hls->number++;
} else {
ff_format_io_close(s, &oc->pb);
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(hls->current_segment_final_filename_fmt)) {
ff_rename(old_filename, hls->avf->filename, hls);
}
if (hls->vtt_avf)
ff_format_io_close(s, &hls->vtt_avf->pb);
ret = hls_start(s);
}
if (ret < 0) {
av_free(old_filename);
return ret;
}
if ((ret = hls_window(s, 0)) < 0) {
av_free(old_filename);
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;
char *old_filename = av_strdup(hls->avf->filename);
if (!old_filename) {
return AVERROR(ENOMEM);
}
av_write_trailer(oc);
if (oc->pb) {
hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
ff_format_io_close(s, &oc->pb);
/* after av_write_trailer, then duration + 1 duration per packet */
hls_append_segment(s, hls, hls->duration + hls->dpp, hls->start_pos, hls->size);
}
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(hls->current_segment_final_filename_fmt)) {
ff_rename(old_filename, hls->avf->filename, hls);
}
if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0] != 0) {
size_t len = strlen(oc->filename);
char final_filename[sizeof(oc->filename)];
av_strlcpy(final_filename, oc->filename, len);
final_filename[len-4] = '\0';
ff_rename(oc->filename, final_filename, s);
oc->filename[len-4] = '\0';
}
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);
hls->avf = NULL;
hls_window(s, 1);
if (vtt_oc) {
av_freep(&hls->vtt_basename);
av_freep(&hls->vtt_m3u8_name);
avformat_free_context(vtt_oc);
}
hls_free_segments(hls->segments);
hls_free_segments(hls->old_segments);
av_free(old_filename);
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_init_time", "set segment length in seconds at init list", OFFSET(init_time), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 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_segment_size", "maximum size per segment file, (in bytes)", OFFSET(max_seg_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, 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"},
{"temp_file", "write segment to temporary file and rename when complete", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_TEMP_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"},
{"split_by_time", "split the hls segment by time which user set by hls_time", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SPLIT_BY_TIME }, 0, UINT_MAX, E, "flags"},
{"append_list", "append the new segments into old hls segment list", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_APPEND_LIST }, 0, UINT_MAX, E, "flags"},
{"program_date_time", "add EXT-X-PROGRAM-DATE-TIME", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PROGRAM_DATE_TIME }, 0, UINT_MAX, E, "flags"},
{"second_level_segment_index", "include segment index in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_INDEX }, 0, UINT_MAX, E, "flags"},
{"second_level_segment_duration", "include segment duration in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_DURATION }, 0, UINT_MAX, E, "flags"},
{"second_level_segment_size", "include segment size in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_SIZE }, 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 },
{"hls_playlist_type", "set the HLS playlist type", OFFSET(pl_type), AV_OPT_TYPE_INT, {.i64 = PLAYLIST_TYPE_NONE }, 0, PLAYLIST_TYPE_NB-1, E, "pl_type" },
{"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
{"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
{"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_start_number_source", "set source of first number in sequence", OFFSET(start_sequence_source_type), AV_OPT_TYPE_INT, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, 0, HLS_START_SEQUENCE_AS_FORMATTED_DATETIME, E, "start_sequence_source_type" },
{"generic", "start_number value (default)", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
{"epoch", "seconds since epoch", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
{"datetime", "current datetime as YYYYMMDDhhmmss", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_FORMATTED_DATETIME }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
{ 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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