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hls.c File Reference

Apple HTTP Live Streaming demuxer http://tools.ietf.org/html/draft-pantos-http-live-streaming. More...

#include "libavformat/http.h"
#include "libavutil/avstring.h"
#include "libavutil/avassert.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavutil/time.h"
#include "avformat.h"
#include "internal.h"
#include "avio_internal.h"
#include "id3v2.h"

Go to the source code of this file.

Data Structures

struct  segment
 
struct  playlist
 
struct  rendition
 
struct  variant
 
struct  HLSContext
 
struct  variant_info
 
struct  key_info
 
struct  init_section_info
 
struct  rendition_info
 

Macros

#define INITIAL_BUFFER_SIZE   32768
 
#define MAX_FIELD_LEN   64
 
#define MAX_CHARACTERISTICS_LEN   512
 
#define MPEG_TIME_BASE   90000
 
#define MPEG_TIME_BASE_Q   (AVRational){1, MPEG_TIME_BASE}
 
#define OFFSET(x)   offsetof(HLSContext, x)
 
#define FLAGS   AV_OPT_FLAG_DECODING_PARAM
 

Enumerations

enum  KeyType { KEY_NONE, KEY_AES_128, KEY_SAMPLE_AES }
 
enum  PlaylistType {
  PLS_TYPE_UNSPECIFIED, PLS_TYPE_EVENT, PLS_TYPE_VOD, PLAYLIST_TYPE_NONE,
  PLAYLIST_TYPE_EVENT, PLAYLIST_TYPE_VOD, PLAYLIST_TYPE_NB
}
 

Functions

static void free_segment_dynarray (struct segment **segments, int n_segments)
 
static void free_segment_list (struct playlist *pls)
 
static void free_init_section_list (struct playlist *pls)
 
static void free_playlist_list (HLSContext *c)
 
static void free_variant_list (HLSContext *c)
 
static void free_rendition_list (HLSContext *c)
 
static void reset_packet (AVPacket *pkt)
 
static struct playlist * new_playlist (HLSContext *c, const char *url, const char *base)
 
static struct variant * new_variant (HLSContext *c, struct variant_info *info, const char *url, const char *base)
 
static void handle_variant_args (struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
 
static void handle_key_args (struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
 
static struct segment * new_init_section (struct playlist *pls, struct init_section_info *info, const char *url_base)
 
static void handle_init_section_args (struct init_section_info *info, const char *key, int key_len, char **dest, int *dest_len)
 
static struct rendition * new_rendition (HLSContext *c, struct rendition_info *info, const char *url_base)
 
static void handle_rendition_args (struct rendition_info *info, const char *key, int key_len, char **dest, int *dest_len)
 
static int ensure_playlist (HLSContext *c, struct playlist **pls, const char *url)
 
static int open_url_keepalive (AVFormatContext *s, AVIOContext **pb, const char *url)
 
static int open_url (AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
 
static int parse_playlist (HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
 
static struct segment * current_segment (struct playlist *pls)
 
static struct segment * next_segment (struct playlist *pls)
 
static int read_from_url (struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size)
 
static void parse_id3 (AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
 
static int id3_has_changed_values (struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
 
static void handle_id3 (AVIOContext *pb, struct playlist *pls)
 
static void intercept_id3 (struct playlist *pls, uint8_t *buf, int buf_size, int *len)
 
static int open_input (HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
 
static int update_init_section (struct playlist *pls, struct segment *seg)
 
static int64_t default_reload_interval (struct playlist *pls)
 
static int playlist_needed (struct playlist *pls)
 
static int read_data (void *opaque, uint8_t *buf, int buf_size)
 
static void add_renditions_to_variant (HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
 
static void add_metadata_from_renditions (AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
 
static int find_timestamp_in_playlist (HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
 
static int select_cur_seq_no (HLSContext *c, struct playlist *pls)
 
static int save_avio_options (AVFormatContext *s)
 
static int nested_io_open (AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
 
static void add_stream_to_programs (AVFormatContext *s, struct playlist *pls, AVStream *stream)
 
static int set_stream_info_from_input_stream (AVStream *st, struct playlist *pls, AVStream *ist)
 
static int update_streams_from_subdemuxer (AVFormatContext *s, struct playlist *pls)
 
static void update_noheader_flag (AVFormatContext *s)
 
static int hls_close (AVFormatContext *s)
 
static int hls_read_header (AVFormatContext *s)
 
static int recheck_discard_flags (AVFormatContext *s, int first)
 
static void fill_timing_for_id3_timestamped_stream (struct playlist *pls)
 
static AVRational get_timebase (struct playlist *pls)
 
static int compare_ts_with_wrapdetect (int64_t ts_a, struct playlist *pls_a, int64_t ts_b, struct playlist *pls_b)
 
static int hls_read_packet (AVFormatContext *s, AVPacket *pkt)
 
static int hls_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
 
static int hls_probe (AVProbeData *p)
 

Variables

static const AVOption hls_options []
 
static const AVClass hls_class
 
AVInputFormat ff_hls_demuxer
 

Detailed Description

Apple HTTP Live Streaming demuxer http://tools.ietf.org/html/draft-pantos-http-live-streaming.

Definition in file hls.c.

Macro Definition Documentation

#define INITIAL_BUFFER_SIZE   32768

Definition at line 42 of file hls.c.

Referenced by hls_read_header().

#define MAX_FIELD_LEN   64

Definition at line 44 of file hls.c.

#define MAX_CHARACTERISTICS_LEN   512

Definition at line 45 of file hls.c.

#define MPEG_TIME_BASE   90000

Definition at line 47 of file hls.c.

Referenced by set_stream_info_from_input_stream().

#define MPEG_TIME_BASE_Q   (AVRational){1, MPEG_TIME_BASE}

Definition at line 48 of file hls.c.

Referenced by compare_ts_with_wrapdetect(), fill_timing_for_id3_timestamped_stream(), and get_timebase().

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

Definition at line 2301 of file hls.c.

#define FLAGS   AV_OPT_FLAG_DECODING_PARAM

Definition at line 2302 of file hls.c.

Enumeration Type Documentation

enum KeyType
Enumerator
KEY_NONE 
KEY_AES_128 
KEY_SAMPLE_AES 

Definition at line 62 of file hls.c.

enum PlaylistType
Enumerator
PLS_TYPE_UNSPECIFIED 
PLS_TYPE_EVENT 
PLS_TYPE_VOD 
PLAYLIST_TYPE_NONE 
PLAYLIST_TYPE_EVENT 
PLAYLIST_TYPE_VOD 
PLAYLIST_TYPE_NB 

Definition at line 82 of file hls.c.

Function Documentation

static void free_segment_dynarray ( struct segment **  segments,
int  n_segments 
)
static

Definition at line 214 of file hls.c.

Referenced by free_segment_list(), and parse_playlist().

static void free_segment_list ( struct playlist *  pls)
static

Definition at line 224 of file hls.c.

Referenced by free_playlist_list().

static void free_init_section_list ( struct playlist *  pls)
static

Definition at line 231 of file hls.c.

Referenced by free_playlist_list().

static void free_playlist_list ( HLSContext *  c)
static

Definition at line 242 of file hls.c.

Referenced by hls_close().

static void free_variant_list ( HLSContext *  c)
static

Definition at line 273 of file hls.c.

Referenced by hls_close().

static void free_rendition_list ( HLSContext *  c)
static

Definition at line 285 of file hls.c.

Referenced by hls_close().

static void reset_packet ( AVPacket *  pkt)
static

Definition at line 298 of file hls.c.

Referenced by hls_read_packet(), hls_read_seek(), and new_playlist().

static struct playlist* new_playlist ( HLSContext *  c,
const char *  url,
const char *  base 
)
static

Definition at line 304 of file hls.c.

Referenced by new_rendition(), and new_variant().

static struct variant* new_variant ( HLSContext *  c,
struct variant_info *  info,
const char *  url,
const char *  base 
)
static

Definition at line 329 of file hls.c.

Referenced by ensure_playlist(), and parse_playlist().

static void handle_variant_args ( struct variant_info *  info,
const char *  key,
int  key_len,
char **  dest,
int *  dest_len 
)
static

Definition at line 355 of file hls.c.

Referenced by parse_playlist().

static void handle_key_args ( struct key_info *  info,
const char *  key,
int  key_len,
char **  dest,
int *  dest_len 
)
static

Definition at line 379 of file hls.c.

Referenced by parse_playlist().

static struct segment* new_init_section ( struct playlist *  pls,
struct init_section_info *  info,
const char *  url_base 
)
static

Definition at line 399 of file hls.c.

Referenced by parse_playlist().

static void handle_init_section_args ( struct init_section_info *  info,
const char *  key,
int  key_len,
char **  dest,
int *  dest_len 
)
static

Definition at line 436 of file hls.c.

Referenced by parse_playlist().

static struct rendition* new_rendition ( HLSContext *  c,
struct rendition_info *  info,
const char *  url_base 
)
static

Definition at line 460 of file hls.c.

Referenced by parse_playlist().

static void handle_rendition_args ( struct rendition_info *  info,
const char *  key,
int  key_len,
char **  dest,
int *  dest_len 
)
static

Definition at line 538 of file hls.c.

Referenced by parse_playlist().

static int ensure_playlist ( HLSContext *  c,
struct playlist **  pls,
const char *  url 
)
static

Definition at line 582 of file hls.c.

Referenced by parse_playlist().

static int open_url_keepalive ( AVFormatContext *  s,
AVIOContext **  pb,
const char *  url 
)
static

Definition at line 592 of file hls.c.

Referenced by open_url(), and parse_playlist().

static int open_url ( AVFormatContext *  s,
AVIOContext **  pb,
const char *  url,
AVDictionary *  opts,
AVDictionary *  opts2,
int *  is_http_out 
)
static

Definition at line 610 of file hls.c.

Referenced by open_input().

static int parse_playlist ( HLSContext *  c,
const char *  url,
struct playlist *  pls,
AVIOContext *  in 
)
static

Definition at line 687 of file hls.c.

Referenced by hls_read_header(), read_data(), and select_cur_seq_no().

static struct segment* current_segment ( struct playlist *  pls)
static

Definition at line 950 of file hls.c.

Referenced by intercept_id3(), and read_data().

static struct segment* next_segment ( struct playlist *  pls)
static

Definition at line 955 of file hls.c.

Referenced by read_data().

static int read_from_url ( struct playlist *  pls,
struct segment *  seg,
uint8_t *  buf,
int  buf_size 
)
static

Definition at line 963 of file hls.c.

Referenced by intercept_id3(), read_data(), and update_init_section().

static void parse_id3 ( AVFormatContext *  s,
AVIOContext *  pb,
AVDictionary **  metadata,
int64_t *  dts,
ID3v2ExtraMetaAPIC **  apic,
ID3v2ExtraMeta **  extra_meta 
)
static

Definition at line 980 of file hls.c.

Referenced by handle_id3().

static int id3_has_changed_values ( struct playlist *  pls,
AVDictionary *  metadata,
ID3v2ExtraMetaAPIC *  apic 
)
static

Definition at line 1006 of file hls.c.

Referenced by handle_id3().

static void handle_id3 ( AVIOContext *  pb,
struct playlist *  pls 
)
static

Definition at line 1035 of file hls.c.

Referenced by intercept_id3().

static void intercept_id3 ( struct playlist *  pls,
uint8_t *  buf,
int  buf_size,
int *  len 
)
static

Definition at line 1077 of file hls.c.

Referenced by read_data().

static int open_input ( HLSContext *  c,
struct playlist *  pls,
struct segment *  seg,
AVIOContext **  in 
)
static

Definition at line 1177 of file hls.c.

Referenced by read_data(), and update_init_section().

static int update_init_section ( struct playlist *  pls,
struct segment *  seg 
)
static

Definition at line 1264 of file hls.c.

Referenced by read_data().

static int64_t default_reload_interval ( struct playlist *  pls)
static

Definition at line 1321 of file hls.c.

Referenced by read_data(), and select_cur_seq_no().

static int playlist_needed ( struct playlist *  pls)
static

Definition at line 1328 of file hls.c.

Referenced by read_data(), and recheck_discard_flags().

static int read_data ( void *  opaque,
uint8_t *  buf,
int  buf_size 
)
static

Definition at line 1374 of file hls.c.

Referenced by hls_read_header().

static void add_renditions_to_variant ( HLSContext *  c,
struct variant *  var,
enum AVMediaType  type,
const char *  group_id 
)
static

Definition at line 1522 of file hls.c.

Referenced by hls_read_header().

static void add_metadata_from_renditions ( AVFormatContext *  s,
struct playlist *  pls,
enum AVMediaType  type 
)
static

Definition at line 1546 of file hls.c.

Referenced by hls_read_header().

static int find_timestamp_in_playlist ( HLSContext *  c,
struct playlist *  pls,
int64_t  timestamp,
int *  seq_no 
)
static

Definition at line 1578 of file hls.c.

Referenced by hls_read_seek(), and select_cur_seq_no().

static int select_cur_seq_no ( HLSContext *  c,
struct playlist *  pls 
)
static

Definition at line 1604 of file hls.c.

Referenced by hls_read_header(), and recheck_discard_flags().

static int save_avio_options ( AVFormatContext *  s)
static

Definition at line 1643 of file hls.c.

Referenced by hls_read_header().

static int nested_io_open ( AVFormatContext *  s,
AVIOContext **  pb,
const char *  url,
int  flags,
AVDictionary **  opts 
)
static

Definition at line 1665 of file hls.c.

Referenced by hls_read_header().

static void add_stream_to_programs ( AVFormatContext *  s,
struct playlist *  pls,
AVStream *  stream 
)
static

Definition at line 1675 of file hls.c.

Referenced by update_streams_from_subdemuxer().

static int set_stream_info_from_input_stream ( AVStream *  st,
struct playlist *  pls,
AVStream *  ist 
)
static

Definition at line 1701 of file hls.c.

Referenced by hls_read_packet(), and update_streams_from_subdemuxer().

static int update_streams_from_subdemuxer ( AVFormatContext *  s,
struct playlist *  pls 
)
static

Definition at line 1720 of file hls.c.

Referenced by hls_read_header(), and hls_read_packet().

static void update_noheader_flag ( AVFormatContext *  s)
static

Definition at line 1745 of file hls.c.

Referenced by hls_read_header(), and hls_read_packet().

static int hls_close ( AVFormatContext *  s)
static

Definition at line 1766 of file hls.c.

Referenced by hls_read_header().

static int hls_read_header ( AVFormatContext *  s)
static

Definition at line 1780 of file hls.c.

static int recheck_discard_flags ( AVFormatContext *  s,
int  first 
)
static

Definition at line 1979 of file hls.c.

Referenced by hls_read_packet().

static void fill_timing_for_id3_timestamped_stream ( struct playlist *  pls)
static

Definition at line 2018 of file hls.c.

Referenced by hls_read_packet().

static AVRational get_timebase ( struct playlist *  pls)
static

Definition at line 2043 of file hls.c.

Referenced by compare_ts_with_wrapdetect(), and hls_read_packet().

static int compare_ts_with_wrapdetect ( int64_t  ts_a,
struct playlist *  pls_a,
int64_t  ts_b,
struct playlist *  pls_b 
)
static

Definition at line 2051 of file hls.c.

Referenced by hls_read_packet().

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

Definition at line 2060 of file hls.c.

static int hls_read_seek ( AVFormatContext *  s,
int  stream_index,
int64_t  timestamp,
int  flags 
)
static

Definition at line 2202 of file hls.c.

static int hls_probe ( AVProbeData *  p)
static

Definition at line 2287 of file hls.c.

Variable Documentation

const AVOption hls_options[]
static
Initial value:
= {
{"live_start_index", "segment index to start live streams at (negative values are from the end)",
OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
{"allowed_extensions", "List of file extensions that hls is allowed to access",
OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
{.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
INT_MIN, INT_MAX, FLAGS},
{"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
{"http_persistent", "Use persistent HTTP connections",
OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
{"http_multiple", "Use multiple HTTP connections for fetching segments",
OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
{NULL}
}
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_INT
Definition: opt.h:223
FLAGS
#define FLAGS
Definition: hls.c:2302
AV_OPT_TYPE_STRING
Definition: opt.h:227
AV_OPT_TYPE_BOOL
Definition: opt.h:240
OFFSET
#define OFFSET(x)
Definition: hls.c:2301

Definition at line 2303 of file hls.c.

const AVClass hls_class
static
Initial value:
= {
.class_name = "hls,applehttp",
.item_name = av_default_item_name,
.option = hls_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
hls_options
static const AVOption hls_options[]
Definition: hls.c:2303

Definition at line 2319 of file hls.c.

AVInputFormat ff_hls_demuxer
Initial value:
= {
.name = "hls,applehttp",
.long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
.priv_class = &hls_class,
.priv_data_size = sizeof(HLSContext),
.flags = AVFMT_NOGENSEARCH,
.read_probe = hls_probe,
.read_header = hls_read_header,
.read_packet = hls_read_packet,
.read_close = hls_close,
.read_seek = hls_read_seek,
}
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
hls_class
static const AVClass hls_class
Definition: hls.c:2319
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
read_probe
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
hls_read_packet
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:2060
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVFMT_NOGENSEARCH
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:476
hls_read_header
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1780
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:596
hls_probe
static int hls_probe(AVProbeData *p)
Definition: hls.c:2287
hls_read_seek
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2202
hls_close
static int hls_close(AVFormatContext *s)
Definition: hls.c:1766

Definition at line 2326 of file hls.c.

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