sbgdec.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/time_internal.h"
#include "avformat.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, char **rbuf)
static void	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, AVCodecContext *avc, struct ws_intervals *inter)
static av_cold int	sbg_read_probe (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
AVInputFormat	ff_sbg_demuxer

Macro Definition Documentation

#define SBG_SCALE   (1 << 16)

Definition at line 32 of file sbgdec.c.

Referenced by scale_double().

#define DAY   (24 * 60 * 60)

Definition at line 33 of file sbgdec.c.

Referenced by expand_timestamps().

#define DAY_TS   ((int64_t)DAY * AV_TIME_BASE)

Definition at line 34 of file sbgdec.c.

Referenced by expand_timestamps(), and generate_intervals().

#define FORWARD_ERROR

(

c

)

Value:

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

Definition at line 315 of file sbgdec.c.

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

#define ADD_EDATA32

(

v

)

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

Referenced by encode_intervals().

#define ADD_EDATA64

(

v

)

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

Referenced by encode_intervals().

Enumeration Type Documentation

enum sbg_fade_type

Enumerator:

SBG_FADE_SILENCE
SBG_FADE_SAME
SBG_FADE_ADAPT

Definition at line 48 of file sbgdec.c.

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 58 of file sbgdec.c.

enum ws_interval_type

Enumerator:

WS_SINE
WS_NOISE
WS_SINE
WS_NOISE

Definition at line 138 of file sbgdec.c.

Function Documentation

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

static

Definition at line 158 of file sbgdec.c.

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

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

static

Definition at line 178 of file sbgdec.c.

Referenced by lex_time(), and parse_options().

static int is_space ( char  c )

inlinestatic

Definition at line 204 of file sbgdec.c.

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

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

inlinestatic

Definition at line 209 of file sbgdec.c.

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

static int lex_space ( struct sbg_parser *  p )

static

Definition at line 221 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().

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

static

Definition at line 230 of file sbgdec.c.

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

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

static

Definition at line 238 of file sbgdec.c.

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

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

static

Definition at line 254 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().

static int lex_line_end ( struct sbg_parser *  p )

static

Definition at line 262 of file sbgdec.c.

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

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

static

Definition at line 280 of file sbgdec.c.

Referenced by parse_optarg(), and parse_options().

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

static

Definition at line 294 of file sbgdec.c.

Referenced by parse_named_def(), and parse_time_sequence().

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

static

Definition at line 308 of file sbgdec.c.

Referenced by parse_timestamp().

static int parse_immediate ( struct sbg_parser *  p )

static

Definition at line 322 of file sbgdec.c.

Referenced by parse_options().

static int parse_preprogrammed ( struct sbg_parser *  p )

static

Definition at line 329 of file sbgdec.c.

Referenced by parse_options().

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

static

Definition at line 336 of file sbgdec.c.

Referenced by parse_options().

static int parse_options ( struct sbg_parser *  p )

static

Definition at line 346 of file sbgdec.c.

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

static

Definition at line 459 of file sbgdec.c.

Referenced by parse_time_sequence().

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

static

Definition at line 490 of file sbgdec.c.

Referenced by parse_time_sequence().

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

static

Definition at line 514 of file sbgdec.c.

Referenced by parse_block_def(), and parse_script().

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

static

Definition at line 567 of file sbgdec.c.

Referenced by parse_named_def().

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

static

Definition at line 574 of file sbgdec.c.

Referenced by parse_named_def().

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

static

Definition at line 603 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().

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

static

Definition at line 616 of file sbgdec.c.

Referenced by parse_synth_channel().

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

static

Definition at line 637 of file sbgdec.c.

Referenced by parse_synth_channel().

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

static

Definition at line 650 of file sbgdec.c.

Referenced by parse_synth_channel().

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

static

Definition at line 669 of file sbgdec.c.

Referenced by parse_synth_channel().

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

static

Definition at line 682 of file sbgdec.c.

Referenced by parse_synth_channel().

static int parse_synth_channel ( struct sbg_parser *  p )

static

Definition at line 705 of file sbgdec.c.

Referenced by parse_synth_def().

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

static

Definition at line 731 of file sbgdec.c.

Referenced by parse_named_def().

static int parse_named_def ( struct sbg_parser *  p )

static

Definition at line 755 of file sbgdec.c.

Referenced by parse_script().

static void free_script ( struct sbg_script *  s )

static

Definition at line 782 of file sbgdec.c.

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

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

static

Definition at line 792 of file sbgdec.c.

Referenced by sbg_read_header(), and sbg_read_probe().

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

static

Definition at line 854 of file sbgdec.c.

Referenced by sbg_read_header().

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

static

Definition at line 887 of file sbgdec.c.

Referenced by expand_script().

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 941 of file sbgdec.c.

Referenced by expand_script().

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

static

Definition at line 985 of file sbgdec.c.

Referenced by sbg_read_header().

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 1004 of file sbgdec.c.

Referenced by add_bell(), and generate_interval().

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 1038 of file sbgdec.c.

Referenced by 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 1066 of file sbgdec.c.

Referenced by generate_plateau(), and generate_transition().

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

static

Definition at line 1145 of file sbgdec.c.

Referenced by generate_intervals().

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 1174 of file sbgdec.c.

Referenced by generate_intervals().

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

static

Definition at line 1260 of file sbgdec.c.

Referenced by sbg_read_header().

static int encode_intervals ( struct sbg_script *  s, AVCodecContext *  avc, struct ws_intervals *  inter  )

static

Definition at line 1325 of file sbgdec.c.

Referenced by sbg_read_header().

static av_cold int sbg_read_probe ( AVProbeData *  p )

static

Definition at line 1368 of file sbgdec.c.

static av_cold int sbg_read_header ( AVFormatContext *  avf )

static

Definition at line 1380 of file sbgdec.c.

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

static

Definition at line 1444 of file sbgdec.c.

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 1464 of file sbgdec.c.

Referenced by sbg_read_seek().

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

static

Definition at line 1475 of file sbgdec.c.

Variable Documentation

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 1481 of file sbgdec.c.

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 1494 of file sbgdec.c.

AVInputFormat ff_sbg_demuxer

Initial value:

= {
    .name           = "sbg",
    .long_name      = NULL_IF_CONFIG_SMALL("SBaGen binaural beats script"),
    .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,
    .extensions     = "sbg",
    .priv_class     = &sbg_demuxer_class,
}

Definition at line 1501 of file sbgdec.c.