ibxm.c File Reference

#include "stdlib.h"
#include "string.h"
#include "ibxm.h"

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Classes
struct	note
struct	channel
struct	replay

Functions
static int	exp_2 (int x)
static int	log_2 (int x)
static char *	data_ascii (struct data *data, int offset, int length, char *dest)
static int	data_s8 (struct data *data, int offset)
static int	data_u8 (struct data *data, int offset)
static int	data_u16be (struct data *data, int offset)
static int	data_u16le (struct data *data, int offset)
static unsigned int	data_u32le (struct data *data, int offset)
static void	data_sam_s8 (struct data *data, int offset, int count, short *dest)
static void	data_sam_s16le (struct data *data, int offset, int count, short *dest)
static int	envelope_next_tick (struct envelope *envelope, int tick, int key_on)
static int	envelope_calculate_ampl (struct envelope *envelope, int tick)
static void	sample_ping_pong (struct sample *sample)
void	dispose_module (struct module *module)
static struct module *	module_load_xm (struct data *data, char *message)
static struct module *	module_load_s3m (struct data *data, char *message)
static struct module *	module_load_mod (struct data *data, char *message)
struct module *	module_load (struct data *data, char *message)
static void	pattern_get_note (struct pattern *pattern, int row, int chan, struct note *dest)
static void	channel_init (struct channel *channel, struct replay *replay, int idx)
static void	channel_volume_slide (struct channel *channel)
static void	channel_porta_up (struct channel *channel, int param)
static void	channel_porta_down (struct channel *channel, int param)
static void	channel_tone_porta (struct channel *channel)
static int	channel_waveform (struct channel *channel, int phase, int type)
static void	channel_vibrato (struct channel *channel, int fine)
static void	channel_tremolo (struct channel *channel)
static void	channel_tremor (struct channel *channel)
static void	channel_retrig_vol_slide (struct channel *channel)
static void	channel_trigger (struct channel *channel)
static void	channel_update_envelopes (struct channel *channel)
static void	channel_auto_vibrato (struct channel *channel)
static void	channel_calculate_freq (struct channel *channel)
static void	channel_calculate_ampl (struct channel *channel)
static void	channel_tick (struct channel *channel)
static void	channel_row (struct channel *channel, struct note *note)
static void	channel_resample (struct channel *channel, int *mix_buf, int offset, int count, int sample_rate, int interpolate)
static void	channel_update_sample_idx (struct channel *channel, int count, int sample_rate)
static void	replay_row (struct replay *replay)
static int	replay_tick (struct replay *replay)
static int	module_init_play_count (struct module *module, char **play_count)
void	replay_set_sequence_pos (struct replay *replay, int pos)
void	dispose_replay (struct replay *replay)
struct replay *	new_replay (struct module *module, int sample_rate, int interpolation)
static int	calculate_tick_len (int tempo, int sample_rate)
int	calculate_mix_buf_len (int sample_rate)
int	replay_calculate_duration (struct replay *replay)
int	replay_seek (struct replay *replay, int sample_pos)
static void	replay_volume_ramp (struct replay *replay, int *mix_buf, int tick_len)
static void	downsample (int *buf, int count)
int	replay_get_audio (struct replay *replay, int *mix_buf)

Variables
const char *	IBXM_VERSION = "ibxm/ac mod/xm/s3m replay 20170901 (c)[email protected]"
static const int	FP_SHIFT = 15
static const int	FP_ONE = 32768
static const int	FP_MASK = 32767
static const int	exp2_table []
static const short	sine_table []

Function Documentation

calculate_mix_buf_len()

int calculate_mix_buf_len

(

int

sample_rate

)

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calculate_tick_len()

static int calculate_tick_len ( int  tempo, int  sample_rate  )

static

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channel_auto_vibrato()

static void channel_auto_vibrato ( struct channel *  channel )

static

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channel_calculate_ampl()

static void channel_calculate_ampl ( struct channel *  channel )

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channel_calculate_freq()

static void channel_calculate_freq ( struct channel *  channel )

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channel_init()

static void channel_init ( struct channel *  channel, struct replay *  replay, int  idx  )

static

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channel_porta_down()

static void channel_porta_down ( struct channel *  channel, int  param  )

static

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channel_porta_up()

static void channel_porta_up ( struct channel *  channel, int  param  )

static

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channel_resample()

static void channel_resample ( struct channel *  channel, int *  mix_buf, int  offset, int  count, int  sample_rate, int  interpolate  )

static

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channel_retrig_vol_slide()

static void channel_retrig_vol_slide ( struct channel *  channel )

static

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channel_row()

static void channel_row ( struct channel *  channel, struct note *  note  )

static

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channel_tick()

static void channel_tick ( struct channel *  channel )

static

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channel_tone_porta()

static void channel_tone_porta ( struct channel *  channel )

static

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channel_tremolo()

static void channel_tremolo ( struct channel *  channel )

static

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channel_tremor()

static void channel_tremor ( struct channel *  channel )

static

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channel_trigger()

static void channel_trigger ( struct channel *  channel )

static

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channel_update_envelopes()

static void channel_update_envelopes ( struct channel *  channel )

static

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channel_update_sample_idx()

static void channel_update_sample_idx ( struct channel *  channel, int  count, int  sample_rate  )

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channel_vibrato()

static void channel_vibrato ( struct channel *  channel, int  fine  )

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channel_volume_slide()

static void channel_volume_slide ( struct channel *  channel )

static

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channel_waveform()

static int channel_waveform ( struct channel *  channel, int  phase, int  type  )

static

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data_ascii()

static char* data_ascii ( struct data *  data, int  offset, int  length, char *  dest  )

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data_s8()

static int data_s8 ( struct data *  data, int  offset  )

static

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data_sam_s16le()

static void data_sam_s16le ( struct data *  data, int  offset, int  count, short *  dest  )

static

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data_sam_s8()

static void data_sam_s8 ( struct data *  data, int  offset, int  count, short *  dest  )

static

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data_u16be()

static int data_u16be ( struct data *  data, int  offset  )

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data_u16le()

static int data_u16le ( struct data *  data, int  offset  )

static

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data_u32le()

static unsigned int data_u32le ( struct data *  data, int  offset  )

static

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data_u8()

static int data_u8 ( struct data *  data, int  offset  )

static

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dispose_module()

void dispose_module

(

struct module *

module

)

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dispose_replay()

void dispose_replay

(

struct replay *

replay

)

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downsample()

static void downsample ( int *  buf, int  count  )

static

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envelope_calculate_ampl()

static int envelope_calculate_ampl ( struct envelope *  envelope, int  tick  )

static

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envelope_next_tick()

static int envelope_next_tick ( struct envelope *  envelope, int  tick, int  key_on  )

static

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exp_2()

static int exp_2 ( int  x )

static

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log_2()

static int log_2 ( int  x )

static

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module_init_play_count()

static int module_init_play_count ( struct module *  module, char **  play_count  )

static

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module_load()

struct module* module_load	(	struct data *	data,
		char *	message
	)

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module_load_mod()

static struct module* module_load_mod ( struct data *  data, char *  message  )

static

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module_load_s3m()

static struct module* module_load_s3m ( struct data *  data, char *  message  )

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module_load_xm()

static struct module* module_load_xm ( struct data *  data, char *  message  )

static

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new_replay()

struct replay* new_replay	(	struct module *	module,
		int	sample_rate,
		int	interpolation
	)

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pattern_get_note()

static void pattern_get_note ( struct pattern *  pattern, int  row, int  chan, struct note *  dest  )

static

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replay_calculate_duration()

int replay_calculate_duration

(

struct replay *

replay

)

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replay_get_audio()

int replay_get_audio	(	struct replay *	replay,
		int *	mix_buf
	)

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replay_row()

static void replay_row ( struct replay *  replay )

static

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replay_seek()

int replay_seek	(	struct replay *	replay,
		int	sample_pos
	)

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replay_set_sequence_pos()

void replay_set_sequence_pos	(	struct replay *	replay,
		int	pos
	)

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replay_tick()

static int replay_tick ( struct replay *  replay )

static

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replay_volume_ramp()

static void replay_volume_ramp ( struct replay *  replay, int *  mix_buf, int  tick_len  )

static

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sample_ping_pong()

static void sample_ping_pong ( struct sample *  sample )

static

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Variable Documentation

exp2_table

const int exp2_table[]

static

Initial value:

= {
    32768, 32946, 33125, 33305, 33486, 33667, 33850, 34034,
    34219, 34405, 34591, 34779, 34968, 35158, 35349, 35541,
    35734, 35928, 36123, 36319, 36516, 36715, 36914, 37114,
    37316, 37518, 37722, 37927, 38133, 38340, 38548, 38757,
    38968, 39180, 39392, 39606, 39821, 40037, 40255, 40473,
    40693, 40914, 41136, 41360, 41584, 41810, 42037, 42265,
    42495, 42726, 42958, 43191, 43425, 43661, 43898, 44137,
    44376, 44617, 44859, 45103, 45348, 45594, 45842, 46091,
    46341, 46593, 46846, 47100, 47356, 47613, 47871, 48131,
    48393, 48655, 48920, 49185, 49452, 49721, 49991, 50262,
    50535, 50810, 51085, 51363, 51642, 51922, 52204, 52488,
    52773, 53059, 53347, 53637, 53928, 54221, 54515, 54811,
    55109, 55408, 55709, 56012, 56316, 56622, 56929, 57238,
    57549, 57861, 58176, 58491, 58809, 59128, 59449, 59772,
    60097, 60423, 60751, 61081, 61413, 61746, 62081, 62419,
    62757, 63098, 63441, 63785, 64132, 64480, 64830, 65182,
    65536
}

FP_MASK

const int FP_MASK = 32767

static

FP_ONE

const int FP_ONE = 32768

static

FP_SHIFT

const int FP_SHIFT = 15

static

IBXM_VERSION

const char* IBXM_VERSION = "ibxm/ac mod/xm/s3m replay 20170901 (c)[email protected]"

sine_table

const short sine_table[]

static

Initial value:

= {
      0,  24,  49,  74,  97, 120, 141, 161, 180, 197, 212, 224, 235, 244, 250, 253,
    255, 253, 250, 244, 235, 224, 212, 197, 180, 161, 141, 120,  97,  74,  49,  24
}