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.h"
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "avio_internal.h"
#include "avc.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   MAX_URL_SIZE
#define	HLS_MICROSECOND_UNIT   1000000
#define	BUFSIZE   (16 * 1024)
#define	POSTFIX_PATTERN   "_%d"
#define	SEPARATOR   '/'
#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, HLS_START_SEQUENCE_AS_MICROSECONDS_SINCE_EPOCH = 3,   HLS_START_SEQUENCE_LAST }
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), HLS_I_FRAMES_ONLY = (1 << 14) }
enum	SegmentType {   PALETTE_SEGMENT = 0x14, OBJECT_SEGMENT = 0x15, PRESENTATION_SEGMENT = 0x16, WINDOW_SEGMENT = 0x17,   DISPLAY_SEGMENT = 0x80, SEGMENT_TYPE_AUTO = 0, SEGMENT_TYPE_MP4, SEGMENT_TYPE_WEBM,   SEGMENT_TYPE_NB, SEGMENT_TYPE_MPEGTS, SEGMENT_TYPE_FMP4 }

Functions
static int	strftime_expand (const char *fmt, char **dest)
static int	hlsenc_io_open (AVFormatContext *s, AVIOContext **pb, char *filename, AVDictionary **options)
static int	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_str_data_in_filename (char **s, const char *filename, char placeholder, const char *datastring)
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 void	reflush_dynbuf (VariantStream *vs, int *range_length)
static int	hls_delete_file (HLSContext *hls, AVFormatContext *avf, const char *path, const char *proto)
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, VariantStream *vs)
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 const char *	get_relative_url (const char *master_url, const char *media_url)
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 (const char *buf, char **s, int index, const char *varname)
static int	get_nth_codec_stream_index (AVFormatContext *s, enum AVMediaType codec_type, int64_t 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_init_file_resend (AVFormatContext *s, VariantStream *vs)
static int64_t	append_single_file (AVFormatContext *s, VariantStream *vs)
static int	hls_write_packet (AVFormatContext *s, AVPacket *pkt)
static void	hls_deinit (AVFormatContext *s)
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

KEYSIZE

#define KEYSIZE   16

Definition at line 70 of file hlsenc.c.

LINE_BUFFER_SIZE

#define LINE_BUFFER_SIZE   MAX_URL_SIZE

Definition at line 71 of file hlsenc.c.

HLS_MICROSECOND_UNIT

#define HLS_MICROSECOND_UNIT   1000000

Definition at line 72 of file hlsenc.c.

BUFSIZE

#define BUFSIZE   (16 * 1024)

Definition at line 73 of file hlsenc.c.

POSTFIX_PATTERN

#define POSTFIX_PATTERN   "_%d"

Definition at line 74 of file hlsenc.c.

SEPARATOR

#define SEPARATOR   '/'

Definition at line 566 of file hlsenc.c.

OFFSET

#define OFFSET

(

x

)

offsetof(HLSContext, x)

Definition at line 3112 of file hlsenc.c.

E

#define E   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 3113 of file hlsenc.c.

Enumeration Type Documentation

StartSequenceSourceType

enum StartSequenceSourceType

Enumerator
HLS_START_SEQUENCE_AS_START_NUMBER
HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH
HLS_START_SEQUENCE_AS_FORMATTED_DATETIME
HLS_START_SEQUENCE_AS_MICROSECONDS_SINCE_EPOCH
HLS_START_SEQUENCE_LAST

Definition at line 57 of file hlsenc.c.

CodecAttributeStatus

enum CodecAttributeStatus

Enumerator
CODEC_ATTRIBUTE_WRITTEN
CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN

Definition at line 65 of file hlsenc.c.

HLSFlags

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
HLS_I_FRAMES_ONLY

Definition at line 94 of file hlsenc.c.

SegmentType

enum SegmentType

Enumerator
PALETTE_SEGMENT
OBJECT_SEGMENT
PRESENTATION_SEGMENT
WINDOW_SEGMENT
DISPLAY_SEGMENT
SEGMENT_TYPE_AUTO
SEGMENT_TYPE_MP4
SEGMENT_TYPE_WEBM
SEGMENT_TYPE_NB
SEGMENT_TYPE_MPEGTS
SEGMENT_TYPE_FMP4

Definition at line 113 of file hlsenc.c.

Function Documentation

strftime_expand()

static int strftime_expand ( const char *  fmt, char **  dest  )

static

Definition at line 263 of file hlsenc.c.

Referenced by hls_init(), and hls_start().

hlsenc_io_open()

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

static

Definition at line 286 of file hlsenc.c.

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

hlsenc_io_close()

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

static

Definition at line 307 of file hlsenc.c.

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

set_http_options()

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

static

Definition at line 328 of file hlsenc.c.

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

write_codec_attr()

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

static

Definition at line 347 of file hlsenc.c.

Referenced by hls_write_header().

replace_str_data_in_filename()

static int replace_str_data_in_filename ( char **  s, const char *  filename, char  placeholder, const char *  datastring  )

static

Definition at line 438 of file hlsenc.c.

Referenced by format_name(), and hls_delete_old_segments().

replace_int_data_in_filename()

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

static

Definition at line 478 of file hlsenc.c.

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

write_styp()

static void write_styp ( AVIOContext *  pb )

static

Definition at line 526 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

flush_dynbuf()

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

static

Definition at line 536 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

reflush_dynbuf()

static void reflush_dynbuf ( VariantStream *  vs, int *  range_length  )

static

Definition at line 557 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

hls_delete_file()

static int hls_delete_file ( HLSContext *  hls, AVFormatContext *  avf, const char *  path, const char *  proto  )

static

Definition at line 569 of file hlsenc.c.

Referenced by hls_delete_old_segments().

hls_delete_old_segments()

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

static

Definition at line 589 of file hlsenc.c.

Referenced by hls_append_segment().

randomize()

static int randomize ( uint8_t *  buf, int  len  )

static

Definition at line 700 of file hlsenc.c.

Referenced by do_encrypt().

do_encrypt()

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

static

Definition at line 714 of file hlsenc.c.

Referenced by hls_start().

hls_encryption_start()

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

static

Definition at line 788 of file hlsenc.c.

Referenced by hls_start().

hls_mux_init()

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

static

Definition at line 847 of file hlsenc.c.

Referenced by hls_init().

find_segment_by_filename()

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

static

Definition at line 961 of file hlsenc.c.

Referenced by hls_append_segment().

sls_flags_filename_process()

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 971 of file hlsenc.c.

Referenced by hls_append_segment().

sls_flag_check_duration_size_index()

static int sls_flag_check_duration_size_index ( HLSContext *  hls )

static

Definition at line 1011 of file hlsenc.c.

Referenced by hls_init().

sls_flag_check_duration_size()

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

static

Definition at line 1034 of file hlsenc.c.

Referenced by hls_init().

sls_flag_file_rename()

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

static

Definition at line 1054 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

sls_flag_use_localtime_filename()

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

static

Definition at line 1061 of file hlsenc.c.

Referenced by hls_start().

hls_append_segment()

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

static

Definition at line 1109 of file hlsenc.c.

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

parse_playlist()

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

static

Definition at line 1202 of file hlsenc.c.

Referenced by hls_init().

hls_free_segments()

static void hls_free_segments ( HLSSegment *  p )

static

Definition at line 1313 of file hlsenc.c.

Referenced by hls_deinit().

hls_rename_temp_file()

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

static

Definition at line 1324 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

get_relative_url()

static const char* get_relative_url ( const char *  master_url, const char *  media_url  )

static

Definition at line 1339 of file hlsenc.c.

Referenced by create_master_playlist().

get_stream_bit_rate()

static int64_t get_stream_bit_rate ( AVStream *  stream )

static

Definition at line 1359 of file hlsenc.c.

Referenced by create_master_playlist().

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 1375 of file hlsenc.c.

Referenced by hls_window().

hls_window()

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

static

Definition at line 1541 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

hls_start()

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

static

Definition at line 1680 of file hlsenc.c.

Referenced by hls_init(), and hls_write_packet().

get_default_pattern_localtime_fmt()

static const char* get_default_pattern_localtime_fmt ( AVFormatContext *  s )

static

Definition at line 1877 of file hlsenc.c.

Referenced by hls_init().

append_postfix()

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

static

Definition at line 1893 of file hlsenc.c.

Referenced by hls_init().

validate_name()

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

static

Definition at line 1912 of file hlsenc.c.

Referenced by hls_init().

format_name()

static int format_name ( const char *  buf, char **  s, int  index, const char *  varname  )

static

Definition at line 1946 of file hlsenc.c.

Referenced by hls_init().

get_nth_codec_stream_index()

static int get_nth_codec_stream_index ( AVFormatContext *  s, enum AVMediaType  codec_type, int64_t  stream_id  )

static

Definition at line 1992 of file hlsenc.c.

Referenced by parse_variant_stream_mapstring().

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,default:1,language:ENG a:1,agroup:a1,default:0 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. sgroup: is key to specify subtitle group. A string can be given as value.

Definition at line 2010 of file hlsenc.c.

Referenced by update_variant_stream_info().

parse_cc_stream_mapstring()

static int parse_cc_stream_mapstring ( AVFormatContext *  s )

static

Definition at line 2153 of file hlsenc.c.

Referenced by update_variant_stream_info().

update_variant_stream_info()

static int update_variant_stream_info ( AVFormatContext *  s )

static

Definition at line 2230 of file hlsenc.c.

Referenced by hls_init().

update_master_pl_info()

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 2268 of file hlsenc.c.

Referenced by hls_init().

hls_write_header()

static int hls_write_header ( AVFormatContext *  s )

static

Definition at line 2310 of file hlsenc.c.

hls_init_file_resend()

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

static

Definition at line 2369 of file hlsenc.c.

Referenced by hls_write_packet().

append_single_file()

static int64_t append_single_file ( AVFormatContext *  s, VariantStream *  vs  )

static

Definition at line 2386 of file hlsenc.c.

Referenced by hls_write_packet(), and hls_write_trailer().

hls_write_packet()

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

static

Definition at line 2418 of file hlsenc.c.

hls_deinit()

static void hls_deinit ( AVFormatContext *  s )

static

Definition at line 2689 of file hlsenc.c.

hls_write_trailer()

static int hls_write_trailer ( struct AVFormatContext *  s )

static

Definition at line 2722 of file hlsenc.c.

hls_init()

static int hls_init ( AVFormatContext *  s )

static

Definition at line 2861 of file hlsenc.c.

Variable Documentation

options

const AVOption options[]

static

Definition at line 3114 of file hlsenc.c.

Referenced by create_master_playlist(), do_encrypt(), hls_encryption_start(), hls_init_file_resend(), hls_mux_init(), hls_start(), hls_window(), hls_write_packet(), hls_write_trailer(), hlsenc_io_open(), and set_http_options().

hls_class

const AVClass hls_class

static

Initial value:

= {
    .class_name = "hls muxer",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 3185 of file hlsenc.c.

ff_hls_muxer

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,
    .deinit         = hls_deinit,
    .priv_class     = &hls_class,
}

Definition at line 3193 of file hlsenc.c.