FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
sbgdec.c File Reference
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "demux.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  sbg_demuxer
 
struct  sbg_string
 
struct  sbg_fade
 
struct  sbg_timestamp
 
struct  sbg_script_definition
 
struct  sbg_script_synth
 
struct  sbg_script_tseq
 
struct  sbg_script_event
 
struct  sbg_script
 
struct  sbg_parser
 
struct  ws_interval
 
struct  ws_intervals
 

Macros

#define SBG_SCALE   (1 << 16)
 
#define DAY   (24 * 60 * 60)
 
#define DAY_TS   ((int64_t)DAY * AV_TIME_BASE)
 
#define FORWARD_ERROR(c)
 
#define ADD_EDATA32(v)   do { AV_WL32(edata, (v)); edata += 4; } while(0)
 
#define ADD_EDATA64(v)   do { AV_WL64(edata, (v)); edata += 8; } while(0)
 

Enumerations

enum  sbg_fade_type { SBG_FADE_SILENCE = 0, SBG_FADE_SAME = 1, SBG_FADE_ADAPT = 3 }
 
enum  sbg_synth_type {
  SBG_TYPE_NONE, SBG_TYPE_SINE, SBG_TYPE_NOISE, SBG_TYPE_BELL,
  SBG_TYPE_MIX, SBG_TYPE_SPIN
}
 
enum  ws_interval_type { WS_SINE = MKTAG('S','I','N','E'), WS_NOISE = MKTAG('N','O','I','S'), WS_SINE = MKTAG('S','I','N','E'), WS_NOISE = MKTAG('N','O','I','S') }
 

Functions

static void * alloc_array_elem (void **array, size_t elsize, int *size, int *max_size)
 
static int str_to_time (const char *str, int64_t *rtime)
 
static int is_space (char c)
 
static int scale_double (void *log, double d, double m, int *r)
 
static int lex_space (struct sbg_parser *p)
 
static int lex_char (struct sbg_parser *p, char c)
 
static int lex_double (struct sbg_parser *p, double *r)
 
static int lex_fixed (struct sbg_parser *p, const char *t, int l)
 
static int lex_line_end (struct sbg_parser *p)
 
static int lex_wsword (struct sbg_parser *p, struct sbg_string *rs)
 
static int lex_name (struct sbg_parser *p, struct sbg_string *rs)
 
static int lex_time (struct sbg_parser *p, int64_t *rt)
 
static int parse_immediate (struct sbg_parser *p)
 
static int parse_preprogrammed (struct sbg_parser *p)
 
static int parse_optarg (struct sbg_parser *p, char o, struct sbg_string *r)
 
static int parse_options (struct sbg_parser *p)
 
static int parse_timestamp (struct sbg_parser *p, struct sbg_timestamp *rts, int64_t *rrel)
 
static int parse_fade (struct sbg_parser *p, struct sbg_fade *fr)
 
static int parse_time_sequence (struct sbg_parser *p, int inblock)
 
static int parse_wave_def (struct sbg_parser *p, int wavenum)
 
static int parse_block_def (struct sbg_parser *p, struct sbg_script_definition *def)
 
static int parse_volume (struct sbg_parser *p, int *vol)
 
static int parse_synth_channel_sine (struct sbg_parser *p, struct sbg_script_synth *synth)
 
static int parse_synth_channel_pink (struct sbg_parser *p, struct sbg_script_synth *synth)
 
static int parse_synth_channel_bell (struct sbg_parser *p, struct sbg_script_synth *synth)
 
static int parse_synth_channel_mix (struct sbg_parser *p, struct sbg_script_synth *synth)
 
static int parse_synth_channel_spin (struct sbg_parser *p, struct sbg_script_synth *synth)
 
static int parse_synth_channel (struct sbg_parser *p)
 
static int parse_synth_def (struct sbg_parser *p, struct sbg_script_definition *def)
 
static int parse_named_def (struct sbg_parser *p)
 
static void free_script (struct sbg_script *s)
 
static int parse_script (void *log, char *script, int script_len, struct sbg_script *rscript)
 
static int read_whole_file (AVIOContext *io, int max_size, AVBPrint *rbuf)
 
static int expand_timestamps (void *log, struct sbg_script *s)
 
static int expand_tseq (void *log, struct sbg_script *s, int *nb_ev_max, int64_t t0, struct sbg_script_tseq *tseq)
 
static int expand_script (void *log, struct sbg_script *s)
 
static int add_interval (struct ws_intervals *inter, enum ws_interval_type type, uint32_t channels, int ref, int64_t ts1, int32_t f1, int32_t a1, int64_t ts2, int32_t f2, int32_t a2)
 
static int add_bell (struct ws_intervals *inter, struct sbg_script *s, int64_t ts1, int64_t ts2, int32_t f, int32_t a)
 
static int generate_interval (void *log, struct sbg_script *s, struct ws_intervals *inter, int64_t ts1, int64_t ts2, struct sbg_script_synth *s1, struct sbg_script_synth *s2, int transition)
 
static int generate_plateau (void *log, struct sbg_script *s, struct ws_intervals *inter, struct sbg_script_event *ev1)
 
static int generate_transition (void *log, struct sbg_script *s, struct ws_intervals *inter, struct sbg_script_event *ev1, struct sbg_script_event *ev2)
 
static int generate_intervals (void *log, struct sbg_script *s, int sample_rate, struct ws_intervals *inter)
 
static int encode_intervals (struct sbg_script *s, AVCodecParameters *par, struct ws_intervals *inter)
 
static av_cold int sbg_read_probe (const AVProbeData *p)
 
static av_cold int sbg_read_header (AVFormatContext *avf)
 
static int sbg_read_packet (AVFormatContext *avf, AVPacket *packet)
 
static int sbg_read_seek2 (AVFormatContext *avf, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
 
static int sbg_read_seek (AVFormatContext *avf, int stream_index, int64_t ts, int flags)
 

Variables

static const AVOption sbg_options []
 
static const AVClass sbg_demuxer_class
 
const FFInputFormat ff_sbg_demuxer
 

Macro Definition Documentation

◆ SBG_SCALE

#define SBG_SCALE   (1 << 16)

Definition at line 35 of file sbgdec.c.

◆ DAY

#define DAY   (24 * 60 * 60)

Definition at line 36 of file sbgdec.c.

◆ DAY_TS

#define DAY_TS   ((int64_t)DAY * AV_TIME_BASE)

Definition at line 37 of file sbgdec.c.

◆ FORWARD_ERROR

#define FORWARD_ERROR (   c)
Value:
do { \
int errcode = c; \
if (errcode <= 0) \
return errcode ? errcode : AVERROR_INVALIDDATA; \
} while (0)

Definition at line 320 of file sbgdec.c.

◆ ADD_EDATA32

#define ADD_EDATA32 (   v)    do { AV_WL32(edata, (v)); edata += 4; } while(0)

◆ ADD_EDATA64

#define ADD_EDATA64 (   v)    do { AV_WL64(edata, (v)); edata += 8; } while(0)

Enumeration Type Documentation

◆ sbg_fade_type

enum sbg_fade_type
Enumerator
SBG_FADE_SILENCE 
SBG_FADE_SAME 
SBG_FADE_ADAPT 

Definition at line 51 of file sbgdec.c.

◆ sbg_synth_type

enum sbg_synth_type
Enumerator
SBG_TYPE_NONE 
SBG_TYPE_SINE 
SBG_TYPE_NOISE 
SBG_TYPE_BELL 
SBG_TYPE_MIX 
SBG_TYPE_SPIN 

Definition at line 61 of file sbgdec.c.

◆ ws_interval_type

enum ws_interval_type
Enumerator
WS_SINE 
WS_NOISE 
WS_SINE 
WS_NOISE 

Definition at line 141 of file sbgdec.c.

Function Documentation

◆ alloc_array_elem()

static void* alloc_array_elem ( void **  array,
size_t  elsize,
int *  size,
int *  max_size 
)
static

Definition at line 161 of file sbgdec.c.

Referenced by add_interval(), expand_tseq(), parse_named_def(), parse_synth_channel(), and parse_time_sequence().

◆ str_to_time()

static int str_to_time ( const char *  str,
int64_t *  rtime 
)
static

Definition at line 181 of file sbgdec.c.

Referenced by lex_time(), and parse_options().

◆ is_space()

static int is_space ( char  c)
inlinestatic

Definition at line 209 of file sbgdec.c.

Referenced by lex_double(), lex_space(), and lex_wsword().

◆ scale_double()

static int scale_double ( void *  log,
double  d,
double  m,
int *  r 
)
inlinestatic

Definition at line 214 of file sbgdec.c.

Referenced by parse_synth_channel_bell(), parse_synth_channel_sine(), parse_synth_channel_spin(), and parse_volume().

◆ lex_space()

static int lex_space ( struct sbg_parser *  p)
static

Definition at line 226 of file sbgdec.c.

Referenced by lex_line_end(), lex_wsword(), parse_block_def(), parse_named_def(), parse_script(), parse_synth_def(), parse_time_sequence(), and parse_timestamp().

◆ lex_char()

static int lex_char ( struct sbg_parser *  p,
char  c 
)
static

Definition at line 235 of file sbgdec.c.

Referenced by parse_block_def(), parse_fade(), parse_named_def(), parse_options(), parse_synth_channel(), parse_timestamp(), and parse_volume().

◆ lex_double()

static int lex_double ( struct sbg_parser *  p,
double *  r 
)
static

Definition at line 243 of file sbgdec.c.

Referenced by parse_synth_channel_bell(), parse_synth_channel_sine(), parse_synth_channel_spin(), and parse_volume().

◆ lex_fixed()

static int lex_fixed ( struct sbg_parser *  p,
const char *  t,
int  l 
)
static

Definition at line 259 of file sbgdec.c.

Referenced by parse_synth_channel_bell(), parse_synth_channel_mix(), parse_synth_channel_pink(), parse_synth_channel_spin(), parse_time_sequence(), and parse_timestamp().

◆ lex_line_end()

static int lex_line_end ( struct sbg_parser *  p)
static

Definition at line 267 of file sbgdec.c.

Referenced by parse_block_def(), parse_options(), parse_script(), parse_synth_def(), and parse_time_sequence().

◆ lex_wsword()

static int lex_wsword ( struct sbg_parser *  p,
struct sbg_string *  rs 
)
static

Definition at line 285 of file sbgdec.c.

Referenced by parse_optarg(), and parse_options().

◆ lex_name()

static int lex_name ( struct sbg_parser *  p,
struct sbg_string *  rs 
)
static

Definition at line 299 of file sbgdec.c.

Referenced by parse_named_def(), and parse_time_sequence().

◆ lex_time()

static int lex_time ( struct sbg_parser *  p,
int64_t *  rt 
)
static

Definition at line 313 of file sbgdec.c.

Referenced by parse_timestamp().

◆ parse_immediate()

static int parse_immediate ( struct sbg_parser *  p)
static

Definition at line 327 of file sbgdec.c.

Referenced by parse_options().

◆ parse_preprogrammed()

static int parse_preprogrammed ( struct sbg_parser *  p)
static

Definition at line 334 of file sbgdec.c.

Referenced by parse_options().

◆ parse_optarg()

static int parse_optarg ( struct sbg_parser *  p,
char  o,
struct sbg_string *  r 
)
static

Definition at line 341 of file sbgdec.c.

Referenced by parse_options().

◆ parse_options()

static int parse_options ( struct sbg_parser *  p)
static

Definition at line 351 of file sbgdec.c.

Referenced by parse_script().

◆ parse_timestamp()

static int parse_timestamp ( struct sbg_parser *  p,
struct sbg_timestamp *  rts,
int64_t *  rrel 
)
static

Definition at line 464 of file sbgdec.c.

Referenced by parse_time_sequence().

◆ parse_fade()

static int parse_fade ( struct sbg_parser *  p,
struct sbg_fade *  fr 
)
static

Definition at line 497 of file sbgdec.c.

Referenced by parse_time_sequence().

◆ parse_time_sequence()

static int parse_time_sequence ( struct sbg_parser *  p,
int  inblock 
)
static

Definition at line 521 of file sbgdec.c.

Referenced by parse_block_def(), and parse_script().

◆ parse_wave_def()

static int parse_wave_def ( struct sbg_parser *  p,
int  wavenum 
)
static

Definition at line 577 of file sbgdec.c.

Referenced by parse_named_def().

◆ parse_block_def()

static int parse_block_def ( struct sbg_parser *  p,
struct sbg_script_definition *  def 
)
static

Definition at line 584 of file sbgdec.c.

Referenced by parse_named_def().

◆ parse_volume()

static int parse_volume ( struct sbg_parser *  p,
int *  vol 
)
static

Definition at line 613 of file sbgdec.c.

Referenced by parse_synth_channel_bell(), parse_synth_channel_mix(), parse_synth_channel_pink(), parse_synth_channel_sine(), and parse_synth_channel_spin().

◆ parse_synth_channel_sine()

static int parse_synth_channel_sine ( struct sbg_parser *  p,
struct sbg_script_synth *  synth 
)
static

Definition at line 626 of file sbgdec.c.

Referenced by parse_synth_channel().

◆ parse_synth_channel_pink()

static int parse_synth_channel_pink ( struct sbg_parser *  p,
struct sbg_script_synth *  synth 
)
static

Definition at line 647 of file sbgdec.c.

Referenced by parse_synth_channel().

◆ parse_synth_channel_bell()

static int parse_synth_channel_bell ( struct sbg_parser *  p,
struct sbg_script_synth *  synth 
)
static

Definition at line 660 of file sbgdec.c.

Referenced by parse_synth_channel().

◆ parse_synth_channel_mix()

static int parse_synth_channel_mix ( struct sbg_parser *  p,
struct sbg_script_synth *  synth 
)
static

Definition at line 679 of file sbgdec.c.

Referenced by parse_synth_channel().

◆ parse_synth_channel_spin()

static int parse_synth_channel_spin ( struct sbg_parser *  p,
struct sbg_script_synth *  synth 
)
static

Definition at line 692 of file sbgdec.c.

Referenced by parse_synth_channel().

◆ parse_synth_channel()

static int parse_synth_channel ( struct sbg_parser *  p)
static

Definition at line 715 of file sbgdec.c.

Referenced by parse_synth_def().

◆ parse_synth_def()

static int parse_synth_def ( struct sbg_parser *  p,
struct sbg_script_definition *  def 
)
static

Definition at line 741 of file sbgdec.c.

Referenced by parse_named_def().

◆ parse_named_def()

static int parse_named_def ( struct sbg_parser *  p)
static

Definition at line 765 of file sbgdec.c.

Referenced by parse_script().

◆ free_script()

static void free_script ( struct sbg_script *  s)
static

Definition at line 792 of file sbgdec.c.

Referenced by parse_script(), sbg_read_header(), and sbg_read_probe().

◆ parse_script()

static int parse_script ( void *  log,
char *  script,
int  script_len,
struct sbg_script *  rscript 
)
static

Definition at line 802 of file sbgdec.c.

Referenced by sbg_read_header(), and sbg_read_probe().

◆ read_whole_file()

static int read_whole_file ( AVIOContext *  io,
int  max_size,
AVBPrint *  rbuf 
)
static

Definition at line 864 of file sbgdec.c.

Referenced by sbg_read_header().

◆ expand_timestamps()

static int expand_timestamps ( void *  log,
struct sbg_script *  s 
)
static

Definition at line 880 of file sbgdec.c.

Referenced by expand_script().

◆ expand_tseq()

static int expand_tseq ( void *  log,
struct sbg_script *  s,
int *  nb_ev_max,
int64_t  t0,
struct sbg_script_tseq *  tseq 
)
static

Definition at line 940 of file sbgdec.c.

Referenced by expand_script().

◆ expand_script()

static int expand_script ( void *  log,
struct sbg_script *  s 
)
static

Definition at line 989 of file sbgdec.c.

Referenced by sbg_read_header().

◆ add_interval()

static int add_interval ( struct ws_intervals *  inter,
enum ws_interval_type  type,
uint32_t  channels,
int  ref,
int64_t  ts1,
int32_t  f1,
int32_t  a1,
int64_t  ts2,
int32_t  f2,
int32_t  a2 
)
static

Definition at line 1010 of file sbgdec.c.

Referenced by add_bell(), and generate_interval().

◆ add_bell()

static int add_bell ( struct ws_intervals *  inter,
struct sbg_script *  s,
int64_t  ts1,
int64_t  ts2,
int32_t  f,
int32_t  a 
)
static

Definition at line 1044 of file sbgdec.c.

Referenced by generate_interval().

◆ generate_interval()

static int generate_interval ( void *  log,
struct sbg_script *  s,
struct ws_intervals *  inter,
int64_t  ts1,
int64_t  ts2,
struct sbg_script_synth *  s1,
struct sbg_script_synth *  s2,
int  transition 
)
static

Definition at line 1072 of file sbgdec.c.

Referenced by generate_plateau(), and generate_transition().

◆ generate_plateau()

static int generate_plateau ( void *  log,
struct sbg_script *  s,
struct ws_intervals *  inter,
struct sbg_script_event *  ev1 
)
static

Definition at line 1151 of file sbgdec.c.

Referenced by generate_intervals().

◆ generate_transition()

static int generate_transition ( void *  log,
struct sbg_script *  s,
struct ws_intervals *  inter,
struct sbg_script_event *  ev1,
struct sbg_script_event *  ev2 
)
static

Definition at line 1180 of file sbgdec.c.

Referenced by generate_intervals().

◆ generate_intervals()

static int generate_intervals ( void *  log,
struct sbg_script *  s,
int  sample_rate,
struct ws_intervals *  inter 
)
static

Definition at line 1266 of file sbgdec.c.

Referenced by sbg_read_header().

◆ encode_intervals()

static int encode_intervals ( struct sbg_script *  s,
AVCodecParameters *  par,
struct ws_intervals *  inter 
)
static

Definition at line 1340 of file sbgdec.c.

Referenced by sbg_read_header().

◆ sbg_read_probe()

static av_cold int sbg_read_probe ( const AVProbeData *  p)
static

Definition at line 1383 of file sbgdec.c.

◆ sbg_read_header()

static av_cold int sbg_read_header ( AVFormatContext *  avf)
static

Definition at line 1395 of file sbgdec.c.

◆ sbg_read_packet()

static int sbg_read_packet ( AVFormatContext *  avf,
AVPacket *  packet 
)
static

Definition at line 1475 of file sbgdec.c.

◆ sbg_read_seek2()

static int sbg_read_seek2 ( AVFormatContext *  avf,
int  stream_index,
int64_t  min_ts,
int64_t  ts,
int64_t  max_ts,
int  flags 
)
static

Definition at line 1496 of file sbgdec.c.

Referenced by sbg_read_seek().

◆ sbg_read_seek()

static int sbg_read_seek ( AVFormatContext *  avf,
int  stream_index,
int64_t  ts,
int  flags 
)
static

Definition at line 1507 of file sbgdec.c.

Variable Documentation

◆ sbg_options

const AVOption sbg_options[]
static
Initial value:
= {
{ "sample_rate", "", 0x42,
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX,
AV_OPT_FLAG_DECODING_PARAM },
{ "frame_size", "", 0x42,
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX,
AV_OPT_FLAG_DECODING_PARAM },
{ "max_file_size", "", 0x42,
AV_OPT_TYPE_INT, { .i64 = 5000000 }, 0, INT_MAX,
AV_OPT_FLAG_DECODING_PARAM },
{ NULL },
}

Definition at line 1513 of file sbgdec.c.

◆ sbg_demuxer_class

const AVClass sbg_demuxer_class
static
Initial value:
= {
.class_name = "sbg_demuxer",
.item_name = av_default_item_name,
.option = sbg_options,
.version = LIBAVUTIL_VERSION_INT,
}

Definition at line 1526 of file sbgdec.c.

◆ ff_sbg_demuxer

const FFInputFormat ff_sbg_demuxer
Initial value:
= {
.p.name = "sbg",
.p.long_name = NULL_IF_CONFIG_SMALL("SBaGen binaural beats script"),
.p.extensions = "sbg",
.p.priv_class = &sbg_demuxer_class,
.priv_data_size = sizeof(struct sbg_demuxer),
.read_probe = sbg_read_probe,
.read_header = sbg_read_header,
.read_packet = sbg_read_packet,
.read_seek = sbg_read_seek,
.read_seek2 = sbg_read_seek2,
}

Definition at line 1533 of file sbgdec.c.

sbg_read_seek2
static int sbg_read_seek2(AVFormatContext *avf, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: sbgdec.c:1496
sbg_read_packet
static int sbg_read_packet(AVFormatContext *avf, AVPacket *packet)
Definition: sbgdec.c:1475
sbg_options
static const AVOption sbg_options[]
Definition: sbgdec.c:1513
sbg_read_seek
static int sbg_read_seek(AVFormatContext *avf, int stream_index, int64_t ts, int flags)
Definition: sbgdec.c:1507
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
sbg_demuxer
Definition: sbgdec.c:39
NULL
#define NULL
Definition: coverity.c:32
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
sbg_demuxer_class
static const AVClass sbg_demuxer_class
Definition: sbgdec.c:1526
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
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:106
sbg_read_header
static av_cold int sbg_read_header(AVFormatContext *avf)
Definition: sbgdec.c:1395
sbg_read_probe
static av_cold int sbg_read_probe(const AVProbeData *p)
Definition: sbgdec.c:1383
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:235
AV_OPT_FLAG_DECODING_PARAM
#define AV_OPT_FLAG_DECODING_PARAM
A generic parameter which can be set by the user for demuxing or decoding.
Definition: opt.h:273
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
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