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hlsenc.c File Reference
#include "config.h"
#include <float.h>
#include <stdint.h>
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "libavutil/parseutils.h"
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/random_seed.h"
#include "libavutil/opt.h"
#include "libavutil/log.h"
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "avio_internal.h"
#include "hlsplaylist.h"
#include "internal.h"
#include "os_support.h"

Go to the source code of this file.

Data Structures

struct  HLSSegment
 
struct  VariantStream
 
struct  ClosedCaptionsStream
 
struct  HLSContext
 

Macros

#define KEYSIZE   16
 
#define LINE_BUFFER_SIZE   1024
 
#define HLS_MICROSECOND_UNIT   1000000
 
#define POSTFIX_PATTERN   "_%d"
 
#define OFFSET(x)   offsetof(HLSContext, x)
 
#define E   AV_OPT_FLAG_ENCODING_PARAM
 

Enumerations

enum  StartSequenceSourceType { HLS_START_SEQUENCE_AS_START_NUMBER = 0, HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH = 1, HLS_START_SEQUENCE_AS_FORMATTED_DATETIME = 2 }
 
enum  CodecAttributeStatus { CODEC_ATTRIBUTE_WRITTEN = 0, CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN }
 
enum  HLSFlags {
  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), HLS_SECOND_LEVEL_SEGMENT_DURATION = (1 << 9), HLS_SECOND_LEVEL_SEGMENT_SIZE = (1 << 10), HLS_TEMP_FILE = (1 << 11),
  HLS_PERIODIC_REKEY = (1 << 12), HLS_INDEPENDENT_SEGMENTS = (1 << 13)
}
 
enum  SegmentType {
  PALETTE_SEGMENT = 0x14, OBJECT_SEGMENT = 0x15, PRESENTATION_SEGMENT = 0x16, WINDOW_SEGMENT = 0x17,
  DISPLAY_SEGMENT = 0x80, SEGMENT_TYPE_MP4 = 0, SEGMENT_TYPE_WEBM, SEGMENT_TYPE_NB,
  SEGMENT_TYPE_MPEGTS, SEGMENT_TYPE_FMP4
}
 

Functions

static int hlsenc_io_open (AVFormatContext *s, AVIOContext **pb, char *filename, AVDictionary **options)
 
static void hlsenc_io_close (AVFormatContext *s, AVIOContext **pb, char *filename)
 
static void set_http_options (AVFormatContext *s, AVDictionary **options, HLSContext *c)
 
static void write_codec_attr (AVStream *st, VariantStream *vs)
 
static int replace_int_data_in_filename (char **s, const char *filename, char placeholder, int64_t number)
 
static void write_styp (AVIOContext *pb)
 
static int flush_dynbuf (VariantStream *vs, int *range_length)
 
static int hls_delete_old_segments (AVFormatContext *s, HLSContext *hls, VariantStream *vs)
 
static int randomize (uint8_t *buf, int len)
 
static int do_encrypt (AVFormatContext *s, VariantStream *vs)
 
static int hls_encryption_start (AVFormatContext *s)
 
static int hls_mux_init (AVFormatContext *s, VariantStream *vs)
 
static HLSSegment * find_segment_by_filename (HLSSegment *segment, const char *filename)
 
static int sls_flags_filename_process (struct AVFormatContext *s, HLSContext *hls, VariantStream *vs, HLSSegment *en, double duration, int64_t pos, int64_t size)
 
static int sls_flag_check_duration_size_index (HLSContext *hls)
 
static int sls_flag_check_duration_size (HLSContext *hls, VariantStream *vs)
 
static void sls_flag_file_rename (HLSContext *hls, VariantStream *vs, char *old_filename)
 
static int sls_flag_use_localtime_filename (AVFormatContext *oc, HLSContext *c, VariantStream *vs)
 
static int hls_append_segment (struct AVFormatContext *s, HLSContext *hls, VariantStream *vs, double duration, int64_t pos, int64_t size)
 
static int parse_playlist (AVFormatContext *s, const char *url, VariantStream *vs)
 
static void hls_free_segments (HLSSegment *p)
 
static int hls_rename_temp_file (AVFormatContext *s, AVFormatContext *oc)
 
static int get_relative_url (const char *master_url, const char *media_url, char *rel_url, int rel_url_buf_size)
 
static int64_t get_stream_bit_rate (AVStream *stream)
 
static int create_master_playlist (AVFormatContext *s, VariantStream *const input_vs)
 
static int hls_window (AVFormatContext *s, int last, VariantStream *vs)
 
static int hls_start (AVFormatContext *s, VariantStream *vs)
 
static const char * get_default_pattern_localtime_fmt (AVFormatContext *s)
 
static int append_postfix (char *name, int name_buf_len, int i)
 
static int validate_name (int nb_vs, const char *fn)
 
static int format_name (char *buf, int buf_len, int index)
 
static int get_nth_codec_stream_index (AVFormatContext *s, enum AVMediaType codec_type, int stream_id)
 
static int parse_variant_stream_mapstring (AVFormatContext *s)
 
static int parse_cc_stream_mapstring (AVFormatContext *s)
 
static int update_variant_stream_info (AVFormatContext *s)
 
static int update_master_pl_info (AVFormatContext *s)
 
static int hls_write_header (AVFormatContext *s)
 
static int hls_write_packet (AVFormatContext *s, AVPacket *pkt)
 
static int hls_write_trailer (struct AVFormatContext *s)
 
static int hls_init (AVFormatContext *s)
 

Variables

static const AVOption options []
 
static const AVClass hls_class
 
AVOutputFormat ff_hls_muxer
 

Macro Definition Documentation

#define KEYSIZE   16

Definition at line 66 of file hlsenc.c.

Referenced by do_encrypt(), hls_encryption_start(), and hls_start().

#define LINE_BUFFER_SIZE   1024

Definition at line 67 of file hlsenc.c.

#define HLS_MICROSECOND_UNIT   1000000

Definition at line 68 of file hlsenc.c.

Referenced by sls_flags_filename_process().

#define POSTFIX_PATTERN   "_%d"

Definition at line 69 of file hlsenc.c.

Referenced by append_postfix(), and hls_init().

#define OFFSET (   x)    offsetof(HLSContext, x)

Definition at line 2802 of file hlsenc.c.

#define E   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 2803 of file hlsenc.c.

Enumeration Type Documentation

enum StartSequenceSourceType
Enumerator
HLS_START_SEQUENCE_AS_START_NUMBER 
HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH 
HLS_START_SEQUENCE_AS_FORMATTED_DATETIME 

Definition at line 55 of file hlsenc.c.

enum CodecAttributeStatus
Enumerator
CODEC_ATTRIBUTE_WRITTEN 
CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN 

Definition at line 61 of file hlsenc.c.

enum HLSFlags
Enumerator
HLS_SINGLE_FILE 
HLS_DELETE_SEGMENTS 
HLS_ROUND_DURATIONS 
HLS_DISCONT_START 
HLS_OMIT_ENDLIST 
HLS_SPLIT_BY_TIME 
HLS_APPEND_LIST 
HLS_PROGRAM_DATE_TIME 
HLS_SECOND_LEVEL_SEGMENT_INDEX 
HLS_SECOND_LEVEL_SEGMENT_DURATION 
HLS_SECOND_LEVEL_SEGMENT_SIZE 
HLS_TEMP_FILE 
HLS_PERIODIC_REKEY 
HLS_INDEPENDENT_SEGMENTS 

Definition at line 86 of file hlsenc.c.

enum SegmentType
Enumerator
PALETTE_SEGMENT 
OBJECT_SEGMENT 
PRESENTATION_SEGMENT 
WINDOW_SEGMENT 
DISPLAY_SEGMENT 
SEGMENT_TYPE_MP4 
SEGMENT_TYPE_WEBM 
SEGMENT_TYPE_NB 
SEGMENT_TYPE_MPEGTS 
SEGMENT_TYPE_FMP4 

Definition at line 104 of file hlsenc.c.

Function Documentation

static int hlsenc_io_open ( AVFormatContext *  s,
AVIOContext **  pb,
char *  filename,
AVDictionary **  options 
)
static

Definition at line 232 of file hlsenc.c.

Referenced by create_master_playlist(), hls_mux_init(), hls_start(), hls_window(), hls_write_packet(), and hls_write_trailer().

static void hlsenc_io_close ( AVFormatContext *  s,
AVIOContext **  pb,
char *  filename 
)
static

Definition at line 249 of file hlsenc.c.

Referenced by create_master_playlist(), hls_window(), hls_write_packet(), and hls_write_trailer().

static void set_http_options ( AVFormatContext *  s,
AVDictionary **  options,
HLSContext *  c 
)
static

Definition at line 264 of file hlsenc.c.

Referenced by create_master_playlist(), hls_mux_init(), hls_start(), hls_window(), and hls_write_packet().

static void write_codec_attr ( AVStream *  st,
VariantStream *  vs 
)
static

Definition at line 282 of file hlsenc.c.

Referenced by hls_write_header().

static int replace_int_data_in_filename ( char **  s,
const char *  filename,
char  placeholder,
int64_t  number 
)
static

Definition at line 327 of file hlsenc.c.

Referenced by format_name(), hls_delete_old_segments(), hls_start(), sls_flag_use_localtime_filename(), and sls_flags_filename_process().

static void write_styp ( AVIOContext *  pb)
static

Definition at line 376 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

static int flush_dynbuf ( VariantStream *  vs,
int *  range_length 
)
static

Definition at line 386 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

static int hls_delete_old_segments ( AVFormatContext *  s,
HLSContext *  hls,
VariantStream *  vs 
)
static

Definition at line 409 of file hlsenc.c.

Referenced by hls_append_segment().

static int randomize ( uint8_t *  buf,
int  len 
)
static

Definition at line 538 of file hlsenc.c.

Referenced by do_encrypt().

static int do_encrypt ( AVFormatContext *  s,
VariantStream *  vs 
)
static

Definition at line 552 of file hlsenc.c.

Referenced by hls_start().

static int hls_encryption_start ( AVFormatContext *  s)
static

Definition at line 621 of file hlsenc.c.

Referenced by hls_start().

static int hls_mux_init ( AVFormatContext *  s,
VariantStream *  vs 
)
static

Definition at line 673 of file hlsenc.c.

Referenced by hls_init().

static HLSSegment* find_segment_by_filename ( HLSSegment *  segment,
const char *  filename 
)
static

Definition at line 785 of file hlsenc.c.

Referenced by hls_append_segment().

static int sls_flags_filename_process ( struct AVFormatContext *  s,
HLSContext *  hls,
VariantStream *  vs,
HLSSegment *  en,
double  duration,
int64_t  pos,
int64_t  size 
)
static

Definition at line 795 of file hlsenc.c.

Referenced by hls_append_segment().

static int sls_flag_check_duration_size_index ( HLSContext *  hls)
static

Definition at line 838 of file hlsenc.c.

Referenced by hls_init().

static int sls_flag_check_duration_size ( HLSContext *  hls,
VariantStream *  vs 
)
static

Definition at line 861 of file hlsenc.c.

Referenced by hls_init().

static void sls_flag_file_rename ( HLSContext *  hls,
VariantStream *  vs,
char *  old_filename 
)
static

Definition at line 881 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

static int sls_flag_use_localtime_filename ( AVFormatContext *  oc,
HLSContext *  c,
VariantStream *  vs 
)
static

Definition at line 888 of file hlsenc.c.

Referenced by hls_start().

static int hls_append_segment ( struct AVFormatContext *  s,
HLSContext *  hls,
VariantStream *  vs,
double  duration,
int64_t  pos,
int64_t  size 
)
static

Definition at line 936 of file hlsenc.c.

Referenced by hls_write_packet(), hls_write_trailer(), and parse_playlist().

static int parse_playlist ( AVFormatContext *  s,
const char *  url,
VariantStream *  vs 
)
static

Definition at line 1024 of file hlsenc.c.

Referenced by hls_init().

static void hls_free_segments ( HLSSegment *  p)
static

Definition at line 1114 of file hlsenc.c.

Referenced by hls_write_trailer().

static int hls_rename_temp_file ( AVFormatContext *  s,
AVFormatContext *  oc 
)
static

Definition at line 1125 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

static int get_relative_url ( const char *  master_url,
const char *  media_url,
char *  rel_url,
int  rel_url_buf_size 
)
static

Definition at line 1140 of file hlsenc.c.

Referenced by create_master_playlist().

static int64_t get_stream_bit_rate ( AVStream *  stream)
static

Definition at line 1158 of file hlsenc.c.

Referenced by create_master_playlist().

static int create_master_playlist ( AVFormatContext *  s,
VariantStream *const  input_vs 
)
static

Traverse through the list of audio only rendition streams and find the rendition which has highest bitrate in the same audio group

Definition at line 1173 of file hlsenc.c.

Referenced by hls_window().

static int hls_window ( AVFormatContext *  s,
int  last,
VariantStream *  vs 
)
static

Definition at line 1332 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

static int hls_start ( AVFormatContext *  s,
VariantStream *  vs 
)
static

Definition at line 1449 of file hlsenc.c.

Referenced by hls_init(), and hls_write_packet().

static const char* get_default_pattern_localtime_fmt ( AVFormatContext *  s)
static

Definition at line 1636 of file hlsenc.c.

Referenced by hls_init().

static int append_postfix ( char *  name,
int  name_buf_len,
int  i 
)
static

Definition at line 1652 of file hlsenc.c.

Referenced by hls_init().

static int validate_name ( int  nb_vs,
const char *  fn 
)
static

Definition at line 1671 of file hlsenc.c.

Referenced by hls_init().

static int format_name ( char *  buf,
int  buf_len,
int  index 
)
static

Definition at line 1710 of file hlsenc.c.

Referenced by hls_init().

static int get_nth_codec_stream_index ( AVFormatContext *  s,
enum AVMediaType  codec_type,
int  stream_id 
)
static

Definition at line 1756 of file hlsenc.c.

Referenced by parse_variant_stream_mapstring().

static int parse_variant_stream_mapstring ( AVFormatContext *  s)
static

Expected format for var_stream_map string is as below: "a:0,v:0 a:1,v:1" "a:0,agroup:a0 a:1,agroup:a1 v:0,agroup:a0 v:1,agroup:a1" This string specifies how to group the audio, video and subtitle streams into different variant streams. The variant stream groups are separated by space.

a:, v:, s: are keys to specify audio, video and subtitle streams respectively. Allowed values are 0 to 9 digits (limited just based on practical usage)

agroup: is key to specify audio group. A string can be given as value.

Definition at line 1774 of file hlsenc.c.

Referenced by update_variant_stream_info().

static int parse_cc_stream_mapstring ( AVFormatContext *  s)
static

Definition at line 1877 of file hlsenc.c.

Referenced by update_variant_stream_info().

static int update_variant_stream_info ( AVFormatContext *  s)
static

Definition at line 1956 of file hlsenc.c.

Referenced by hls_init().

static int update_master_pl_info ( AVFormatContext *  s)
static

if output file's directory has v, variants are created in sub-directories then master is created at the sub-directories level

Definition at line 1997 of file hlsenc.c.

Referenced by hls_init().

static int hls_write_header ( AVFormatContext *  s)
static

Definition at line 2041 of file hlsenc.c.

static int hls_write_packet ( AVFormatContext *  s,
AVPacket *  pkt 
)
static

Definition at line 2104 of file hlsenc.c.

static int hls_write_trailer ( struct AVFormatContext *  s)
static

Definition at line 2328 of file hlsenc.c.

static int hls_init ( AVFormatContext *  s)
static

Definition at line 2460 of file hlsenc.c.

Variable Documentation

const AVOption options[]
static

Definition at line 2804 of file hlsenc.c.

Referenced by create_master_playlist(), hls_delete_old_segments(), hls_mux_init(), hls_start(), and hls_window().

const AVClass hls_class
static
Initial value:
= {
.class_name = "hls muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
}
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
options
static const AVOption options[]
Definition: hlsenc.c:2804

Definition at line 2870 of file hlsenc.c.

AVOutputFormat ff_hls_muxer
Initial value:
= {
.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_GLOBALHEADER | AVFMT_ALLOW_FLUSH | AVFMT_NODIMENSIONS,
.init = hls_init,
.write_header = hls_write_header,
.write_packet = hls_write_packet,
.write_trailer = hls_write_trailer,
.priv_class = &hls_class,
}
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
hls_write_trailer
static int hls_write_trailer(struct AVFormatContext *s)
Definition: hlsenc.c:2328
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVFMT_ALLOW_FLUSH
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:478
AV_CODEC_ID_H264
Definition: avcodec.h:245
AV_CODEC_ID_WEBVTT
Definition: avcodec.h:670
AV_CODEC_ID_AAC
Definition: avcodec.h:560
hls_write_header
static int hls_write_header(AVFormatContext *s)
Definition: hlsenc.c:2041
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
AVFMT_GLOBALHEADER
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:468
hls_write_packet
static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hlsenc.c:2104
hls_init
static int hls_init(AVFormatContext *s)
Definition: hlsenc.c:2460
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:596
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:465
AVFMT_NODIMENSIONS
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:473
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
hls_class
static const AVClass hls_class
Definition: hlsenc.c:2870

Definition at line 2878 of file hlsenc.c.

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