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ngunix/tracker/it/itrender.c
eukos bdddd7aba2 Major restructure for the future
2015-08-07 12:06:39 +02:00

3739 lines
122 KiB
C
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/* _______ ____ __ ___ ___
* \ _ \ \ / \ / \ \ / / ' ' '
* | | \ \ | | || | \/ | . .
* | | | | | | || ||\ /| |
* | | | | | | || || \/ | | ' ' '
* | | | | | | || || | | . .
* | |_/ / \ \__// || | |
* /_______/ynamic \____/niversal /__\ /____\usic /| . . ibliotheque
* / \
* / . \
* itrender.c - Code to render an Impulse Tracker / / \ \
* module. | < / \_
* | \/ /\ /
* Written - painstakingly - by entheh. \_ / > /
* | \ / /
* | ' /
* \__/
*/
#include <math.h>
#include <stdlib.h>
#include "dumb.h"
#include "internal/it.h"
static IT_PLAYING *dup_playing(IT_PLAYING *src, IT_CHANNEL *dstchannel, IT_CHANNEL *srcchannel)
{
IT_PLAYING *dst;
if (!src) return NULL;
dst = malloc(sizeof(*dst));
if (!dst) return NULL;
dst->flags = src->flags;
ASSERT(src->channel);
dst->channel = &dstchannel[src->channel - srcchannel];
dst->sample = src->sample;
dst->instrument = src->instrument;
dst->env_instrument = src->env_instrument;
dst->sampnum = src->sampnum;
dst->instnum = src->instnum;
dst->channel_volume = src->channel_volume;
dst->volume = src->volume;
dst->pan = src->pan;
dst->note = src->note;
dst->filter_cutoff = src->filter_cutoff;
dst->filter_resonance = src->filter_resonance;
dst->true_filter_cutoff = src->true_filter_cutoff;
dst->true_filter_resonance = src->true_filter_resonance;
dst->vibrato_speed = src->vibrato_speed;
dst->vibrato_depth = src->vibrato_depth;
dst->vibrato_n = src->vibrato_n;
dst->vibrato_time = src->vibrato_time;
dst->tremolo_speed = src->tremolo_speed;
dst->tremolo_depth = src->tremolo_depth;
dst->tremolo_time = src->tremolo_time;
dst->sample_vibrato_time = src->sample_vibrato_time;
dst->sample_vibrato_depth = src->sample_vibrato_depth;
dst->slide = src->slide;
dst->delta = src->delta;
dst->volume_envelope = src->volume_envelope;
dst->pan_envelope = src->pan_envelope;
dst->pitch_envelope = src->pitch_envelope;
dst->fadeoutcount = src->fadeoutcount;
dst->filter_state[0] = src->filter_state[0];
dst->filter_state[1] = src->filter_state[1];
dst->resampler = src->resampler;
dst->resampler.pickup_data = dst;
dst->time_lost = src->time_lost;
return dst;
}
static void dup_channel(IT_CHANNEL *dst, IT_CHANNEL *src)
{
dst->flags = src->flags;
dst->volume = src->volume;
dst->volslide = src->volslide;
dst->xm_volslide = src->xm_volslide;
dst->panslide = src->panslide;
dst->pan = src->pan;
dst->truepan = src->truepan;
dst->channelvolume = src->channelvolume;
dst->channelvolslide = src->channelvolslide;
dst->instrument = src->instrument;
dst->note = src->note;
dst->SFmacro = src->SFmacro;
dst->filter_cutoff = src->filter_cutoff;
dst->filter_resonance = src->filter_resonance;
dst->key_off_count = src->key_off_count;
dst->note_cut_count = src->note_cut_count;
dst->note_delay_count = src->note_delay_count;
dst->note_delay_entry = src->note_delay_entry;
dst->arpeggio = src->arpeggio;
dst->retrig = src->retrig;
dst->xm_retrig = src->xm_retrig;
dst->retrig_tick = src->retrig_tick;
dst->tremor_time = src->tremor_time;
dst->portamento = src->portamento;
dst->toneporta = src->toneporta;
dst->destnote = src->destnote;
dst->sample = src->sample;
dst->truenote = src->truenote;
dst->midi_state = src->midi_state;
dst->lastvolslide = src->lastvolslide;
dst->lastDKL = src->lastDKL;
dst->lastEF = src->lastEF;
dst->lastG = src->lastG;
dst->lastHspeed = src->lastHspeed;
dst->lastHdepth = src->lastHdepth;
dst->lastRspeed = src->lastRspeed;
dst->lastRdepth = src->lastRdepth;
dst->lastI = src->lastI;
dst->lastJ = src->lastJ;
dst->lastN = src->lastN;
dst->lastO = src->lastO;
dst->high_offset = src->high_offset;
dst->lastP = src->lastP;
dst->lastQ = src->lastQ;
dst->lastS = src->lastS;
dst->pat_loop_row = src->pat_loop_row;
dst->pat_loop_count = src->pat_loop_count;
dst->pat_loop_end_row = src->pat_loop_end_row;
dst->lastW = src->lastW;
dst->xm_lastE1 = src->xm_lastE1;
dst->xm_lastE2 = src->xm_lastE2;
dst->xm_lastEA = src->xm_lastEA;
dst->xm_lastEB = src->xm_lastEB;
dst->xm_lastX1 = src->xm_lastX1;
dst->xm_lastX2 = src->xm_lastX2;
dst->playing = dup_playing(src->playing, dst, src);
}
/* Allocate the new callbacks first, then pass them to this function!
* It will free them on failure.
*/
static DUMB_IT_SIGRENDERER *dup_sigrenderer(DUMB_IT_SIGRENDERER *src, int n_channels, IT_CALLBACKS *callbacks)
{
DUMB_IT_SIGRENDERER *dst;
int i;
if (!src) {
if (callbacks) free(callbacks);
return NULL;
}
dst = malloc(sizeof(*dst));
if (!dst) {
if (callbacks) free(callbacks);
return NULL;
}
dst->sigdata = src->sigdata;
dst->n_channels = n_channels;
dst->globalvolume = src->globalvolume;
dst->globalvolslide = src->globalvolslide;
dst->tempo = src->tempo;
dst->temposlide = src->temposlide;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++)
dup_channel(&dst->channel[i], &src->channel[i]);
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++)
dst->playing[i] = dup_playing(src->playing[i], dst->channel, src->channel);
dst->tick = src->tick;
dst->speed = src->speed;
dst->rowcount = src->rowcount;
dst->order = src->order;
dst->row = src->row;
dst->processorder = src->processorder;
dst->processrow = src->processrow;
dst->breakrow = src->breakrow;
dst->pat_loop_row = src->pat_loop_row;
dst->n_rows = src->n_rows;
dst->entry_start = src->entry_start;
dst->entry = src->entry;
dst->entry_end = src->entry_end;
dst->time_left = src->time_left;
dst->sub_time_left = src->sub_time_left;
dst->click_remover = NULL;
dst->callbacks = callbacks;
return dst;
}
static IT_MIDI default_midi = {
/* unsigned char SFmacro[16][16]; */
{
{0xF0, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
},
/* unsigned char SFmacrolen[16]; */
{4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
/* unsigned short SFmacroz[16]; */
/* Bitfield; bit 0 set = z in first position */
{
0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
},
/* unsigned char Zmacro[128][16]; */
{
{0xF0, 0xF0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x48, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x58, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x68, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
},
/* unsigned char Zmacrolen[128]; */
{
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
}
};
static void it_reset_filter_state(IT_FILTER_STATE *state)
{
state->currsample = 0;
state->prevsample = 0;
}
#define LOG10 2.30258509299
/* IMPORTANT: This function expects one extra sample in 'src' so it can apply
* click removal. It reads size samples, starting from src[0], and writes its
* output starting at dst[pos]. The pos parameter is required for getting
* click removal right.
*/
static void it_filter(DUMB_CLICK_REMOVER *cr, IT_FILTER_STATE *state, sample_t *dst, long pos, sample_t *src, long size, int step, int sampfreq, int cutoff, int resonance)
{
sample_t currsample = state->currsample;
sample_t prevsample = state->prevsample;
float a, b, c;
long datasize;
{
float inv_angle = (float)(sampfreq * pow(0.5, 0.25 + cutoff*(1.0/(24<<IT_ENVELOPE_SHIFT))) * (1.0/(2*3.14159265358979323846*110.0)));
float loss = (float)exp(resonance*(-LOG10*1.2/128.0));
float d, e;
#if 0
loss *= 2; // This is the mistake most players seem to make!
#endif
#if 1
d = (1.0f - loss) / inv_angle;
if (d > 2.0f) d = 2.0f;
d = (loss - d) * inv_angle;
e = inv_angle * inv_angle;
a = 1.0f / (1.0f + d + e);
c = -e * a;
b = 1.0f - a - c;
#else
a = 1.0f / (inv_angle*inv_angle + inv_angle*loss + loss);
c = -(inv_angle*inv_angle) * a;
b = 1.0f - a - c;
#endif
}
dst += pos * step;
datasize = size * step;
#define INT_FILTERS
#ifdef INT_FILTERS
#define MULSCA(a, b) ((int)((LONG_LONG)((a) << 4) * (b) >> 32))
#define SCALEB 12
{
int ai = (int)(a * (1 << (16+SCALEB)));
int bi = (int)(b * (1 << (16+SCALEB)));
int ci = (int)(c * (1 << (16+SCALEB)));
int i;
if (cr) {
sample_t startstep = MULSCA(src[0], ai) + MULSCA(currsample, bi) + MULSCA(prevsample, ci);
dumb_record_click(cr, pos, startstep);
}
for (i = 0; i < datasize; i += step) {
{
sample_t newsample = MULSCA(src[i], ai) + MULSCA(currsample, bi) + MULSCA(prevsample, ci);
prevsample = currsample;
currsample = newsample;
}
dst[i] += currsample;
}
if (cr) {
sample_t endstep = MULSCA(src[datasize], ai) + MULSCA(currsample, bi) + MULSCA(prevsample, ci);
dumb_record_click(cr, pos + size, -endstep);
}
}
#else
#error This version is broken - it does not use step, and state should contain floats for it
if (cr) {
float startstep = src[0]*a + currsample*b + prevsample*c;
dumb_record_click(cr, pos, (sample_t)startstep);
}
{
int i = size % 3;
while (i > 0) {
{
float newsample = *src++*a + currsample*b + prevsample*c;
prevsample = currsample;
currsample = newsample;
}
*dst++ += (sample_t)currsample;
i--;
}
i = size / 3;
while (i > 0) {
float newsample;
/* Gotta love unrolled loops! */
*dst++ += (sample_t)(newsample = *src++*a + currsample*b + prevsample*c);
*dst++ += (sample_t)(prevsample = *src++*a + newsample*b + currsample*c);
*dst++ += (sample_t)(currsample = *src++*a + prevsample*b + newsample*c);
i--;
}
}
if (cr) {
float endstep = src[datasize]*a + currsample*b + prevsample*c;
dumb_record_click(cr, pos + size, -(sample_t)endstep);
}
#endif
state->currsample = currsample;
state->prevsample = prevsample;
}
#undef LOG10
static signed char it_sine[256] = {
0, 2, 3, 5, 6, 8, 9, 11, 12, 14, 16, 17, 19, 20, 22, 23,
24, 26, 27, 29, 30, 32, 33, 34, 36, 37, 38, 39, 41, 42, 43, 44,
45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59,
59, 60, 60, 61, 61, 62, 62, 62, 63, 63, 63, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 63, 63, 63, 62, 62, 62, 61, 61, 60, 60,
59, 59, 58, 57, 56, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46,
45, 44, 43, 42, 41, 39, 38, 37, 36, 34, 33, 32, 30, 29, 27, 26,
24, 23, 22, 20, 19, 17, 16, 14, 12, 11, 9, 8, 6, 5, 3, 2,
0, -2, -3, -5, -6, -8, -9,-11,-12,-14,-16,-17,-19,-20,-22,-23,
-24,-26,-27,-29,-30,-32,-33,-34,-36,-37,-38,-39,-41,-42,-43,-44,
-45,-46,-47,-48,-49,-50,-51,-52,-53,-54,-55,-56,-56,-57,-58,-59,
-59,-60,-60,-61,-61,-62,-62,-62,-63,-63,-63,-64,-64,-64,-64,-64,
-64,-64,-64,-64,-64,-64,-63,-63,-63,-62,-62,-62,-61,-61,-60,-60,
-59,-59,-58,-57,-56,-56,-55,-54,-53,-52,-51,-50,-49,-48,-47,-46,
-45,-44,-43,-42,-41,-39,-38,-37,-36,-34,-33,-32,-30,-29,-27,-26,
-24,-23,-22,-20,-19,-17,-16,-14,-12,-11, -9, -8, -6, -5, -3, -2
};
#if 0
/** WARNING: use these! */
/** JULIEN: Plus for XM compatibility it could be interesting to rename
* it_sawtooth[] to it_rampdown[], and add an it_rampup[].
* Also, still for XM compat', twood be good if it was possible to tell the
* the player not to retrig' the waveform on a new instrument.
* Both of these are only for completness though, as I don't think it would
* be very noticeable ;)
*/
/** ENTHEH: IT also has the 'don't retrig' thingy :) */
static signed char it_sawtooth[256] = {
64, 63, 63, 62, 62, 61, 61, 60, 60, 59, 59, 58, 58, 57, 57, 56,
56, 55, 55, 54, 54, 53, 53, 52, 52, 51, 51, 50, 50, 49, 49, 48,
48, 47, 47, 46, 46, 45, 45, 44, 44, 43, 43, 42, 42, 41, 41, 40,
40, 39, 39, 38, 38, 37, 37, 36, 36, 35, 35, 34, 34, 33, 33, 32,
32, 31, 31, 30, 30, 29, 29, 28, 28, 27, 27, 26, 26, 25, 25, 24,
24, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 18, 18, 17, 17, 16,
16, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
0, -1, -1, -2, -2, -3, -3, -4, -4, -5, -5, -6, -6, -7, -7, -8,
-8, -9, -9,-10,-10,-11,-11,-12,-12,-13,-13,-14,-14,-15,-15,-16,
-16,-17,-17,-18,-18,-19,-19,-20,-20,-21,-21,-22,-22,-23,-23,-24,
-24,-25,-25,-26,-26,-27,-27,-28,-28,-29,-29,-30,-30,-31,-31,-32,
-32,-33,-33,-34,-34,-35,-35,-36,-36,-37,-37,-38,-38,-39,-39,-40,
-40,-41,-41,-42,-42,-43,-43,-44,-44,-45,-45,-46,-46,-47,-47,-48,
-48,-49,-49,-50,-50,-51,-51,-52,-52,-53,-53,-54,-54,-55,-55,-56,
-56,-57,-57,-58,-58,-59,-59,-60,-60,-61,-61,-62,-62,-63,-63,-64
};
static signed char it_squarewave[256] = {
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
#endif
static void reset_tick_counts(DUMB_IT_SIGRENDERER *sigrenderer)
{
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
channel->key_off_count = 0;
channel->note_cut_count = 0;
channel->note_delay_count = 0;
}
}
static void reset_effects(DUMB_IT_SIGRENDERER *sigrenderer)
{
int i;
sigrenderer->globalvolslide = 0;
sigrenderer->temposlide = 0;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
channel->volslide = 0;
channel->xm_volslide = 0;
channel->panslide = 0;
channel->channelvolslide = 0;
channel->arpeggio = 0;
channel->retrig = 0;
if (channel->xm_retrig) {
channel->xm_retrig = 0;
channel->retrig_tick = 0;
}
channel->tremor_time &= 127;
channel->portamento = 0;
channel->toneporta = 0;
if (channel->playing) {
channel->playing->vibrato_n = 0;
channel->playing->tremolo_speed = 0;
channel->playing->tremolo_depth = 0;
}
}
}
static void update_tremor(IT_CHANNEL *channel)
{
if ((channel->tremor_time & 128) && channel->playing) {
if (channel->tremor_time == 128)
channel->tremor_time = (channel->lastI >> 4) | 192;
else if (channel->tremor_time == 192)
channel->tremor_time = (channel->lastI & 15) | 128;
else
channel->tremor_time--;
}
}
static void it_pickup_loop(DUMB_RESAMPLER *resampler, void *data)
{
resampler->pos -= resampler->end - resampler->start;
((IT_PLAYING *)data)->time_lost += resampler->end - resampler->start;
}
static void it_pickup_pingpong_loop(DUMB_RESAMPLER *resampler, void *data)
{
if (resampler->dir < 0) {
resampler->pos = (resampler->start << 1) - 1 - resampler->pos;
resampler->subpos ^= 65535;
resampler->dir = 1;
((IT_PLAYING *)data)->time_lost += (resampler->end - resampler->start) << 1;
} else {
resampler->pos = (resampler->end << 1) - 1 - resampler->pos;
resampler->subpos ^= 65535;
resampler->dir = -1;
}
}
static void it_pickup_stop_at_end(DUMB_RESAMPLER *resampler, void *data)
{
(void)data;
if (resampler->dir < 0) {
resampler->pos = (resampler->start << 1) - 1 - resampler->pos;
resampler->subpos ^= 65535;
/* By rights, time_lost would be updated here. However, there is no
* need at this point; it will not be used.
*
* ((IT_PLAYING *)data)->time_lost += (resampler->src_end - resampler->src_start) << 1;
*/
resampler->dir = 1;
} else
resampler->dir = 0;
}
static void it_playing_update_resamplers(IT_PLAYING *playing)
{
if ((playing->sample->flags & IT_SAMPLE_SUS_LOOP) && !(playing->flags & IT_PLAYING_SUSTAINOFF)) {
playing->resampler.start = playing->sample->sus_loop_start;
playing->resampler.end = playing->sample->sus_loop_end;
if (playing->sample->flags & IT_SAMPLE_PINGPONG_SUS_LOOP)
playing->resampler.pickup = &it_pickup_pingpong_loop;
else
playing->resampler.pickup = &it_pickup_loop;
} else if (playing->sample->flags & IT_SAMPLE_LOOP) {
playing->resampler.start = playing->sample->loop_start;
playing->resampler.end = playing->sample->loop_end;
if (playing->sample->flags & IT_SAMPLE_PINGPONG_LOOP)
playing->resampler.pickup = &it_pickup_pingpong_loop;
else
playing->resampler.pickup = &it_pickup_loop;
} else {
if (playing->sample->flags & IT_SAMPLE_SUS_LOOP)
playing->resampler.start = playing->sample->sus_loop_start;
else
playing->resampler.start = 0;
playing->resampler.end = playing->sample->length;
playing->resampler.pickup = &it_pickup_stop_at_end;
}
ASSERT(playing->resampler.pickup_data == playing);
}
/* This should be called whenever the sample or sample position changes. */
static void it_playing_reset_resamplers(IT_PLAYING *playing, long pos)
{
int bits = playing->sample->flags & IT_SAMPLE_16BIT ? 16 : 8;
int channels = playing->sample->flags & IT_SAMPLE_STEREO ? 2 : 1;
dumb_reset_resampler_n(bits, &playing->resampler, playing->sample->data, channels, pos, 0, 0);
playing->resampler.pickup_data = playing;
playing->time_lost = 0;
playing->flags &= ~IT_PLAYING_DEAD;
it_playing_update_resamplers(playing);
}
static void update_retrig(IT_CHANNEL *channel)
{
if (channel->xm_retrig) {
channel->retrig_tick--;
if (channel->retrig_tick <= 0) {
if (channel->playing) it_playing_reset_resamplers(channel->playing, 0);
channel->retrig_tick = channel->xm_retrig;
}
} else if (channel->retrig & 0x0F) {
channel->retrig_tick--;
if (channel->retrig_tick <= 0) {
if (channel->retrig < 0x10) {
} else if (channel->retrig < 0x20) {
channel->volume--;
if (channel->volume > 64) channel->volume = 0;
} else if (channel->retrig < 0x30) {
channel->volume -= 2;
if (channel->volume > 64) channel->volume = 0;
} else if (channel->retrig < 0x40) {
channel->volume -= 4;
if (channel->volume > 64) channel->volume = 0;
} else if (channel->retrig < 0x50) {
channel->volume -= 8;
if (channel->volume > 64) channel->volume = 0;
} else if (channel->retrig < 0x60) {
channel->volume -= 16;
if (channel->volume > 64) channel->volume = 0;
} else if (channel->retrig < 0x70) {
channel->volume <<= 1;
channel->volume /= 3;
} else if (channel->retrig < 0x80) {
channel->volume >>= 1;
} else if (channel->retrig < 0x90) {
} else if (channel->retrig < 0xA0) {
channel->volume++;
if (channel->volume > 64) channel->volume = 64;
} else if (channel->retrig < 0xB0) {
channel->volume += 2;
if (channel->volume > 64) channel->volume = 64;
} else if (channel->retrig < 0xC0) {
channel->volume += 4;
if (channel->volume > 64) channel->volume = 64;
} else if (channel->retrig < 0xD0) {
channel->volume += 8;
if (channel->volume > 64) channel->volume = 64;
} else if (channel->retrig < 0xE0) {
channel->volume += 16;
if (channel->volume > 64) channel->volume = 64;
} else if (channel->retrig < 0xF0) {
channel->volume *= 3;
channel->volume >>= 1;
if (channel->volume > 64) channel->volume = 64;
} else {
channel->volume <<= 1;
if (channel->volume > 64) channel->volume = 64;
}
if (channel->playing) it_playing_reset_resamplers(channel->playing, 0);
channel->retrig_tick = channel->retrig & 0x0F;
}
}
}
static void update_smooth_effects(DUMB_IT_SIGRENDERER *sigrenderer)
{
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
IT_PLAYING *playing = channel->playing;
if (playing) {
playing->vibrato_time += playing->vibrato_n *
(playing->vibrato_speed << 2);
playing->tremolo_time += playing->tremolo_speed << 2;
}
}
}
static void update_effects(DUMB_IT_SIGRENDERER *sigrenderer)
{
int i;
if (sigrenderer->globalvolslide) {
sigrenderer->globalvolume += sigrenderer->globalvolslide;
if (sigrenderer->globalvolume > 128) {
if (sigrenderer->globalvolslide >= 0)
sigrenderer->globalvolume = 128;
else
sigrenderer->globalvolume = 0;
}
}
if (sigrenderer->temposlide) {
sigrenderer->tempo += sigrenderer->temposlide;
if (sigrenderer->tempo < 32) {
if (sigrenderer->temposlide >= 0)
sigrenderer->tempo = 255;
else
sigrenderer->tempo = 32;
}
}
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
IT_PLAYING *playing = channel->playing;
if (channel->xm_volslide) {
channel->volume += channel->xm_volslide;
if (channel->volume > 64) {
if (channel->xm_volslide >= 0)
channel->volume = 64;
else
channel->volume = 0;
}
}
if (channel->volslide) {
channel->volume += channel->volslide;
if (channel->volume > 64) {
if (channel->volslide >= 0)
channel->volume = 64;
else
channel->volume = 0;
}
}
if (channel->panslide && !IT_IS_SURROUND(channel->pan)) {
if (sigrenderer->sigdata->flags & IT_WAS_AN_XM) {
if (channel->panslide == -128)
channel->truepan = 32;
else
channel->truepan = MID(32, channel->truepan + channel->panslide*64, 32+255*64);
} else {
channel->pan += channel->panslide;
if (channel->pan > 64) {
if (channel->panslide >= 0)
channel->pan = 64;
else
channel->pan = 0;
}
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
}
}
if (channel->channelvolslide) {
channel->channelvolume += channel->channelvolslide;
if (channel->channelvolume > 64) {
if (channel->channelvolslide >= 0)
channel->channelvolume = 64;
else
channel->channelvolume = 0;
}
if (channel->playing)
channel->playing->channel_volume = channel->channelvolume;
}
update_tremor(channel);
channel->arpeggio = (channel->arpeggio << 4) | (channel->arpeggio >> 8);
channel->arpeggio &= 0xFFF;
update_retrig(channel);
if (playing) {
playing->slide += channel->portamento;
if (sigrenderer->sigdata->flags & IT_LINEAR_SLIDES) {
if (channel->toneporta && channel->destnote < 120) {
int currpitch = ((playing->note - 60) << 8) + playing->slide;
int destpitch = (channel->destnote - 60) << 8;
if (currpitch > destpitch) {
currpitch -= channel->toneporta;
if (currpitch < destpitch) {
currpitch = destpitch;
channel->destnote = IT_NOTE_OFF;
}
} else if (currpitch < destpitch) {
currpitch += channel->toneporta;
if (currpitch > destpitch) {
currpitch = destpitch;
channel->destnote = IT_NOTE_OFF;
}
}
playing->slide = currpitch - ((playing->note - 60) << 8);
}
} else {
if (channel->toneporta && channel->destnote < 120) {
float amiga_multiplier = playing->sample->C5_speed * (1.0f / AMIGA_DIVISOR);
float deltanote = (float)pow(DUMB_SEMITONE_BASE, 60 - playing->note);
/* deltanote is 1.0 for C-5, 0.5 for C-6, etc. */
float deltaslid = deltanote - playing->slide * amiga_multiplier;
float destdelta = (float)pow(DUMB_SEMITONE_BASE, 60 - channel->destnote);
if (deltaslid < destdelta) {
playing->slide -= channel->toneporta;
deltaslid = deltanote - playing->slide * amiga_multiplier;
if (deltaslid > destdelta) {
playing->note = channel->destnote;
playing->slide = 0;
channel->destnote = IT_NOTE_OFF;
}
} else {
playing->slide += channel->toneporta;
deltaslid = deltanote - playing->slide * amiga_multiplier;
if (deltaslid < destdelta) {
playing->note = channel->destnote;
playing->slide = 0;
channel->destnote = IT_NOTE_OFF;
}
}
}
}
}
}
update_smooth_effects(sigrenderer);
}
// This function should be renamed; it doesn't do the 'Update Pattern Variables' operation ittech.txt describes
/* Returns 1 if a pattern loop is happening. */
static int update_pattern_variables(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry)
{
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_EFFECT) {
switch (entry->effect) {
case IT_JUMP_TO_ORDER:
sigrenderer->breakrow = 0;
sigrenderer->processorder = entry->effectvalue - 1;
sigrenderer->processrow = 0xFFFE;
break;
case IT_S:
{
unsigned char effectvalue = entry->effectvalue;
if (effectvalue == 0)
effectvalue = channel->lastS;
channel->lastS = effectvalue;
switch (effectvalue >> 4) {
//case IT_S7:
case IT_S_PATTERN_LOOP:
{
unsigned char v = effectvalue & 15;
if (v == 0)
channel->pat_loop_row = sigrenderer->processrow;
else {
if (channel->pat_loop_count == 0) {
channel->pat_loop_count = v;
sigrenderer->breakrow = channel->pat_loop_row;
if (sigrenderer->sigdata->flags & IT_WAS_AN_XM) {
/* For XM files, if a loop occurs by itself, keep breakrow set for when the pattern ends - fun bug in FT2! */
if (sigrenderer->processrow < 0xFFFE) {
/* Infinite pattern loops are possible, so we check whether the pattern loop we're hitting now is earlier than the last one we hit. */
if (sigrenderer->processrow < channel->pat_loop_end_row)
sigrenderer->processorder = 0xFFFE; /* suspect infinite loop, so trigger loop callback */
else
sigrenderer->processorder = 0xFFFF; /* don't trigger loop callback */
channel->pat_loop_end_row = sigrenderer->processrow;
sigrenderer->processrow = 0xFFFF; /* special case: don't reset breakrow or pat_loop_end_row */
}
} else {
/* IT files do this regardless of other flow control effects seen here. */
sigrenderer->processorder = 0xFFFF; /* special case: don't trigger loop callback */
sigrenderer->processrow = 0xFFFE;
}
return 1;
} else if (--channel->pat_loop_count) {
sigrenderer->breakrow = channel->pat_loop_row;
if (sigrenderer->sigdata->flags & IT_WAS_AN_XM) {
/* For XM files, if a loop occurs by itself, keep breakrow set for when the pattern ends - fun bug in FT2! */
if (sigrenderer->processrow < 0xFFFE) {
/* Infinite pattern loops are possible, so we check whether the pattern loop we're hitting now is earlier than the last one we hit. */
if (sigrenderer->processrow < channel->pat_loop_end_row)
sigrenderer->processorder = 0xFFFE; /* suspect infinite loop, so trigger loop callback */
else
sigrenderer->processorder = 0xFFFF; /* don't trigger loop callback */
channel->pat_loop_end_row = sigrenderer->processrow;
sigrenderer->processrow = 0xFFFF; /* special case: don't reset breakrow or pat_loop_end_row */
}
} else {
/* IT files do this regardless of other flow control effects seen here. */
sigrenderer->processorder = 0xFFFF; /* special case: don't trigger loop callback */
sigrenderer->processrow = 0xFFFE;
}
return 1;
} else if (sigrenderer->sigdata->flags & IT_WAS_AN_XM) {
channel->pat_loop_end_row = 0;
// TODO
/* Findings:
- If a pattern loop completes successfully, and then the pattern terminates, then the next pattern will start on the row corresponding to the E60.
- If a pattern loop doesn't do any loops, and then the pattern terminates, then the next pattern will start on the first row.
- If a break appears to the left of the pattern loop, it jumps into the relevant position in the next pattern, and that's it.
- If a break appears to the right of the pattern loop, it jumps to the start of the next pattern, and that's it.
- If we jump, then effect a loop using an old E60, and then the pattern ends, the next pattern starts on the row corresponding to the E60.
- Theory: breakrow is not cleared when it's a pattern loop effect!
*/
//if (sigrenderer->processrow < 0xFFFE) // I have no idea if this is correct or not - FT2 is so weird :(
// sigrenderer->breakrow = channel->pat_loop_row; /* emulate bug in FT2 */
} else
channel->pat_loop_row = sigrenderer->processrow + 1;
}
}
break;
case IT_S_PATTERN_DELAY:
sigrenderer->rowcount = 1 + (effectvalue & 15);
break;
}
}
}
}
return 0;
}
/* This function guarantees that channel->sample will always be valid if it
* is nonzero. In other words, to check if it is valid, simply check if it is
* nonzero.
*/
static void instrument_to_sample(DUMB_IT_SIGDATA *sigdata, IT_CHANNEL *channel)
{
if (sigdata->flags & IT_USE_INSTRUMENTS) {
if (channel->instrument >= 1 && channel->instrument <= sigdata->n_instruments) {
if (channel->note < 120) {
channel->sample = sigdata->instrument[channel->instrument-1].map_sample[channel->note];
channel->truenote = sigdata->instrument[channel->instrument-1].map_note[channel->note];
} else
channel->sample = 0;
} else
channel->sample = 0;
} else {
channel->sample = channel->instrument;
channel->truenote = channel->note;
}
if (!(channel->sample >= 1 && channel->sample <= sigdata->n_samples && (sigdata->sample[channel->sample-1].flags & IT_SAMPLE_EXISTS)))
channel->sample = 0;
}
static void fix_sample_looping(IT_PLAYING *playing)
{
if ((playing->sample->flags & (IT_SAMPLE_LOOP | IT_SAMPLE_SUS_LOOP)) ==
(IT_SAMPLE_LOOP | IT_SAMPLE_SUS_LOOP)) {
if (playing->resampler.dir < 0) {
playing->resampler.pos = (playing->sample->sus_loop_end << 1) - 1 - playing->resampler.pos;
playing->resampler.subpos ^= 65535;
playing->resampler.dir = 1;
}
playing->resampler.pos += playing->time_lost;
}
}
static void it_compatible_gxx_retrigger(DUMB_IT_SIGDATA *sigdata, IT_CHANNEL *channel)
{
channel->playing->volume_envelope.next_node = 0;
channel->playing->volume_envelope.tick = 0;
channel->playing->pan_envelope.next_node = 0;
channel->playing->pan_envelope.tick = 0;
channel->playing->pitch_envelope.next_node = 0;
channel->playing->pitch_envelope.tick = 0;
channel->playing->fadeoutcount = 1024;
// Should we remove IT_PLAYING_BACKGROUND? Test with sample with sustain loop...
channel->playing->flags &= ~(IT_PLAYING_BACKGROUND | IT_PLAYING_SUSTAINOFF | IT_PLAYING_FADING | IT_PLAYING_DEAD);
it_playing_update_resamplers(channel->playing);
if (channel->sample)
if (sigdata->flags & IT_USE_INSTRUMENTS)
channel->playing->env_instrument = &sigdata->instrument[channel->instrument-1];
}
static void it_note_off(IT_PLAYING *playing)
{
if (playing) {
playing->flags |= IT_PLAYING_BACKGROUND | IT_PLAYING_SUSTAINOFF;
fix_sample_looping(playing);
it_playing_update_resamplers(playing);
if (playing->instrument)
if ((playing->instrument->volume_envelope.flags & (IT_ENVELOPE_ON | IT_ENVELOPE_LOOP_ON)) != IT_ENVELOPE_ON)
playing->flags |= IT_PLAYING_FADING;
}
}
static void xm_note_off(DUMB_IT_SIGDATA *sigdata, IT_CHANNEL *channel)
{
if (channel->playing) {
if (!(sigdata->instrument[channel->instrument-1].volume_envelope.flags & IT_ENVELOPE_ON))
//if (!(entry->mask & IT_ENTRY_INSTRUMENT))
// dunno what that was there for ...
channel->volume = 0;
channel->playing->flags |= IT_PLAYING_SUSTAINOFF | IT_PLAYING_FADING;
it_playing_update_resamplers(channel->playing);
}
}
static void it_retrigger_note(DUMB_IT_SIGRENDERER *sigrenderer, IT_CHANNEL *channel)
{
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
unsigned char nna;
int i;
if (channel->playing) {
#ifdef INVALID_NOTES_CAUSE_NOTE_CUT
if (channel->note == IT_NOTE_OFF)
nna = NNA_NOTE_OFF;
else if (channel->note >= 120 || !channel->playing->instrument || (channel->playing->flags & IT_PLAYING_DEAD))
nna = NNA_NOTE_CUT;
else
nna = channel->playing->instrument->new_note_action;
#else
if (channel->note == IT_NOTE_CUT)
nna = NNA_NOTE_CUT;
if (channel->note >= 120)
nna = NNA_NOTE_OFF;
else if (!channel->playing->instrument || (channel->playing->flags & IT_PLAYING_DEAD))
nna = NNA_NOTE_CUT;
else
nna = channel->playing->instrument->new_note_action;
#endif
switch (nna) {
case NNA_NOTE_CUT:
free(channel->playing);
channel->playing = NULL;
break;
case NNA_NOTE_OFF:
it_note_off(channel->playing);
break;
case NNA_NOTE_FADE:
channel->playing->flags |= IT_PLAYING_BACKGROUND | IT_PLAYING_FADING;
break;
}
}
if (channel->sample == 0 || channel->note >= 120)
return;
channel->destnote = IT_NOTE_OFF;
if (channel->playing) {
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (!sigrenderer->playing[i]) {
sigrenderer->playing[i] = channel->playing;
channel->playing = NULL;
break;
}
}
/** WARNING - come up with some more heuristics for replacing old notes */
#if 0
if (channel->playing) {
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]->flags & IT_PLAYING_BACKGROUND) {
write_seqtime();
sequence_c(SEQUENCE_STOP_SIGNAL);
sequence_c(i);
channel->VChannel = &module->VChannel[i];
break;
}
}
}
#endif
}
if (channel->playing)
free(channel->playing);
channel->playing = malloc(sizeof(*channel->playing));
if (!channel->playing)
return;
channel->playing->flags = 0;
channel->playing->channel = channel;
channel->playing->sample = &sigdata->sample[channel->sample-1];
if (sigdata->flags & IT_USE_INSTRUMENTS)
channel->playing->instrument = &sigdata->instrument[channel->instrument-1];
else
channel->playing->instrument = NULL;
channel->playing->env_instrument = channel->playing->instrument;
channel->playing->sampnum = channel->sample;
channel->playing->instnum = channel->instrument;
channel->playing->channel_volume = channel->channelvolume;
channel->playing->note = channel->truenote;
channel->playing->filter_cutoff = 127;
channel->playing->filter_resonance = 0;
channel->playing->true_filter_cutoff = 127 << 8;
channel->playing->true_filter_resonance = 0;
channel->playing->vibrato_speed = 0;
channel->playing->vibrato_depth = 0;
channel->playing->vibrato_n = 0;
channel->playing->vibrato_time = 0;
channel->playing->tremolo_speed = 0;
channel->playing->tremolo_depth = 0;
channel->playing->tremolo_time = 0;
channel->playing->sample_vibrato_time = 0;
channel->playing->sample_vibrato_depth = 0;
channel->playing->slide = 0;
channel->playing->volume_envelope.next_node = 0;
channel->playing->volume_envelope.tick = 0;
channel->playing->pan_envelope.next_node = 0;
channel->playing->pan_envelope.tick = 0;
channel->playing->pitch_envelope.next_node = 0;
channel->playing->pitch_envelope.tick = 0;
channel->playing->fadeoutcount = 1024;
it_reset_filter_state(&channel->playing->filter_state[0]);
it_reset_filter_state(&channel->playing->filter_state[1]);
it_playing_reset_resamplers(channel->playing, 0);
/** WARNING - is everything initialised? */
}
static void get_default_volpan(DUMB_IT_SIGDATA *sigdata, IT_CHANNEL *channel)
{
if (channel->sample == 0)
return;
channel->volume = sigdata->sample[channel->sample-1].default_volume;
if (sigdata->flags & IT_WAS_AN_XM) {
if (!(sigdata->flags & IT_WAS_A_MOD))
channel->truepan = 32 + sigdata->sample[channel->sample-1].default_pan*64;
return;
}
{
int pan = sigdata->sample[channel->sample-1].default_pan;
if (pan >= 128 && pan <= 192) {
channel->pan = pan - 128;
return;
}
}
if (sigdata->flags & IT_USE_INSTRUMENTS) {
IT_INSTRUMENT *instrument = &sigdata->instrument[channel->instrument-1];
if (instrument->default_pan <= 64)
channel->pan = instrument->default_pan;
if (instrument->filter_cutoff >= 128)
channel->filter_cutoff = instrument->filter_cutoff - 128;
if (instrument->filter_resonance >= 128)
channel->filter_resonance = instrument->filter_resonance - 128;
}
}
static void get_true_pan(DUMB_IT_SIGDATA *sigdata, IT_CHANNEL *channel)
{
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
if (!IT_IS_SURROUND_SHIFTED(channel->truepan) && (sigdata->flags & IT_USE_INSTRUMENTS)) {
IT_INSTRUMENT *instrument = &sigdata->instrument[channel->instrument-1];
int truepan = channel->truepan;
truepan += (channel->note - instrument->pp_centre) * instrument->pp_separation << (IT_ENVELOPE_SHIFT - 3);
channel->truepan = (unsigned short)MID(0, truepan, 64 << IT_ENVELOPE_SHIFT);
}
}
static void post_process_it_volpan(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry)
{
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_VOLPAN) {
if (entry->volpan <= 84) {
/* Volume */
/* Fine volume slide up */
/* Fine volume slide down */
} else if (entry->volpan <= 94) {
/* Volume slide up */
unsigned char v = entry->volpan - 85;
if (v == 0)
v = channel->lastvolslide;
channel->lastvolslide = v;
/* = effect Dx0 where x == entry->volpan - 85 */
channel->volslide = v;
} else if (entry->volpan <= 104) {
/* Volume slide down */
unsigned char v = entry->volpan - 95;
if (v == 0)
v = channel->lastvolslide;
channel->lastvolslide = v;
/* = effect D0x where x == entry->volpan - 95 */
channel->volslide = -v;
} else if (entry->volpan <= 114) {
/* Portamento down */
unsigned char v = (entry->volpan - 105) << 2;
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
channel->portamento -= v << 4;
} else if (entry->volpan <= 124) {
/* Portamento up */
unsigned char v = (entry->volpan - 115) << 2;
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
channel->portamento += v << 4;
} else if (entry->volpan <= 202) {
/* Pan */
/* Tone Portamento */
} else if (entry->volpan <= 212) {
/* Vibrato */
/* This is unaffected by IT_OLD_EFFECTS. However, if v == 0, then any doubling of depth that happened before (with Hxy in the effect column) will be preserved. */
unsigned char v = entry->volpan - 203;
if (v == 0)
v = channel->lastHdepth;
else {
v <<= 2;
channel->lastHdepth = v;
}
if (channel->playing) {
channel->playing->vibrato_speed = channel->lastHspeed;
channel->playing->vibrato_depth = v;
channel->playing->vibrato_n++;
}
}
}
}
static void it_send_midi(DUMB_IT_SIGRENDERER *sigrenderer, IT_CHANNEL *channel, unsigned char midi_byte)
{
if (sigrenderer->callbacks->midi)
if ((*sigrenderer->callbacks->midi)(sigrenderer->callbacks->midi_data, channel - sigrenderer->channel, midi_byte))
return;
switch (channel->midi_state) {
case 4: /* Ready to receive resonance parameter */
if (midi_byte < 0x80) channel->filter_resonance = midi_byte;
channel->midi_state = 0;
break;
case 3: /* Ready to receive cutoff parameter */
if (midi_byte < 0x80) channel->filter_cutoff = midi_byte;
channel->midi_state = 0;
break;
case 2: /* Ready for byte specifying which parameter will follow */
if (midi_byte == 0) /* Cutoff */
channel->midi_state = 3;
else if (midi_byte == 1) /* Resonance */
channel->midi_state = 4;
else
channel->midi_state = 0;
break;
default: /* Counting initial F0 bytes */
switch (midi_byte) {
case 0xF0:
channel->midi_state++;
break;
case 0xFA:
case 0xFC:
case 0xFF:
/* Reset filter parameters for all channels */
{
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
sigrenderer->channel[i].filter_cutoff = 127;
sigrenderer->channel[i].filter_resonance = 0;
//// should we be resetting channel[i].playing->filter_* here?
}
}
/* Fall through */
default:
channel->midi_state = 0;
break;
}
}
}
static void xm_envelope_calculate_value(IT_ENVELOPE *envelope, IT_PLAYING_ENVELOPE *pe)
{
if (pe->next_node <= 0)
pe->value = envelope->node_y[0] << IT_ENVELOPE_SHIFT;
else if (pe->next_node >= envelope->n_nodes)
pe->value = envelope->node_y[envelope->n_nodes-1] << IT_ENVELOPE_SHIFT;
else {
int ys = envelope->node_y[pe->next_node-1] << IT_ENVELOPE_SHIFT;
int ts = envelope->node_t[pe->next_node-1];
int te = envelope->node_t[pe->next_node];
if (ts == te)
pe->value = ys;
else {
int ye = envelope->node_y[pe->next_node] << IT_ENVELOPE_SHIFT;
int t = pe->tick;
pe->value = ys + (ye - ys) * (t - ts) / (te - ts);
}
}
}
/* Returns 1 if a callback caused termination of playback. */
static int process_effects(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry, int ignore_cxx)
{
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_EFFECT) {
switch (entry->effect) {
/*
Notes about effects (as compared to other module formats)
C This is now in *HEX*. (Used to be in decimal in ST3)
E/F/G/H/U You need to check whether the song uses Amiga/Linear slides.
H/U Vibrato in Impulse Tracker is two times finer than in
any other tracker and is updated EVERY tick.
If "Old Effects" is *ON*, then the vibrato is played in the
normal manner (every non-row tick and normal depth)
E/F/G These commands ALL share the same memory.
Oxx Offsets to samples are to the 'xx00th' SAMPLE. (ie. for
16 bit samples, the offset is xx00h*2)
Oxx past the sample end will be ignored, unless "Old Effects"
is ON, in which case the Oxx will play from the end of the
sample.
Yxy This uses a table 4 times larger (hence 4 times slower) than
vibrato or tremelo. If the waveform is set to random, then
the 'speed' part of the command is interpreted as a delay.
*/
case IT_SET_SPEED:
if (entry->effectvalue)
sigrenderer->tick = sigrenderer->speed = entry->effectvalue;
else if (sigdata->flags & IT_WAS_AN_XM) {
sigrenderer->speed = 0;
if (sigrenderer->callbacks->xm_speed_zero && (*sigrenderer->callbacks->xm_speed_zero)(sigrenderer->callbacks->xm_speed_zero_data))
return 1;
}
break;
case IT_BREAK_TO_ROW:
if (ignore_cxx) break;
sigrenderer->breakrow = entry->effectvalue;
sigrenderer->processrow = 0xFFFE;
break;
case IT_VOLSLIDE_VIBRATO:
if (channel->playing) {
channel->playing->vibrato_speed = channel->lastHspeed;
channel->playing->vibrato_depth = channel->lastHdepth;
channel->playing->vibrato_n++;
}
/* Fall through and process volume slide. */
case IT_VOLUME_SLIDE:
case IT_VOLSLIDE_TONEPORTA:
/* The tone portamento component is handled elsewhere. */
{
unsigned char v = entry->effectvalue;
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0)
v = channel->lastDKL;
channel->lastDKL = v;
}
if ((v & 0x0F) == 0) { /* Dx0 */
channel->volslide = v >> 4;
if (channel->volslide == 15 && !(sigdata->flags & IT_WAS_AN_XM)) {
channel->volume += 15;
if (channel->volume > 64) channel->volume = 64;
}
} else if ((v & 0xF0) == 0) { /* D0x */
channel->volslide = -v;
if (channel->volslide == -15 && !(sigdata->flags & IT_WAS_AN_XM)) {
channel->volume -= 15;
if (channel->volume > 64) channel->volume = 0;
}
} else if ((v & 0x0F) == 0x0F) { /* DxF */
channel->volume += v >> 4;
if (channel->volume > 64) channel->volume = 64;
} else if ((v & 0xF0) == 0xF0) { /* DFx */
channel->volume -= v & 15;
if (channel->volume > 64) channel->volume = 0;
}
}
break;
case IT_XM_FINE_VOLSLIDE_DOWN:
{
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->xm_lastEB;
channel->xm_lastEB = v;
channel->volume -= v;
if (channel->volume > 64) channel->volume = 0;
}
break;
case IT_XM_FINE_VOLSLIDE_UP:
{
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->xm_lastEA;
channel->xm_lastEA = v;
channel->volume += v;
if (channel->volume > 64) channel->volume = 64;
}
break;
case IT_PORTAMENTO_DOWN:
{
unsigned char v = entry->effectvalue;
if (sigdata->flags & IT_WAS_AN_XM) {
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0xF0)
v |= channel->xm_lastE2;
else if (v >= 0xF0)
channel->xm_lastE2 = v & 15;
else if (v == 0xE0)
v |= channel->xm_lastX2;
else
channel->xm_lastX2 = v & 15;
}
} else {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
if (channel->playing) {
if ((v & 0xF0) == 0xF0)
channel->playing->slide -= (v & 15) << 4;
else if ((v & 0xF0) == 0xE0)
channel->playing->slide -= (v & 15) << 2;
else
channel->portamento -= v << 4;
}
}
break;
case IT_PORTAMENTO_UP:
{
unsigned char v = entry->effectvalue;
if (sigdata->flags & IT_WAS_AN_XM) {
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0xF0)
v |= channel->xm_lastE1;
else if (v >= 0xF0)
channel->xm_lastE1 = v & 15;
else if (v == 0xE0)
v |= channel->xm_lastX1;
else
channel->xm_lastX1 = v & 15;
}
} else {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
if (channel->playing) {
if ((v & 0xF0) == 0xF0)
channel->playing->slide += (v & 15) << 4;
else if ((v & 0xF0) == 0xE0)
channel->playing->slide += (v & 15) << 2;
else
channel->portamento += v << 4;
}
}
break;
case IT_XM_PORTAMENTO_DOWN:
{
unsigned char v = entry->effectvalue;
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0)
v = channel->lastJ;
channel->lastJ = v;
}
if (channel->playing)
channel->portamento -= v << 4;
}
break;
case IT_XM_PORTAMENTO_UP:
{
unsigned char v = entry->effectvalue;
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
if (channel->playing)
channel->portamento += v << 4;
}
break;
case IT_XM_KEY_OFF:
channel->key_off_count = entry->effectvalue;
if (!channel->key_off_count) xm_note_off(sigdata, channel);
break;
case IT_VIBRATO:
{
unsigned char speed = entry->effectvalue >> 4;
unsigned char depth = entry->effectvalue & 15;
if (speed == 0)
speed = channel->lastHspeed;
channel->lastHspeed = speed;
if (depth == 0)
depth = channel->lastHdepth;
else {
if (sigdata->flags & IT_OLD_EFFECTS)
depth <<= 3;
else
depth <<= 2;
channel->lastHdepth = depth;
}
if (channel->playing) {
channel->playing->vibrato_speed = speed;
channel->playing->vibrato_depth = depth;
channel->playing->vibrato_n++;
}
}
break;
case IT_TREMOR:
{
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->lastI;
else if (!(sigdata->flags & IT_OLD_EFFECTS)) {
if (v & 0xF0) v -= 0x10;
if (v & 0x0F) v -= 0x01;
}
channel->lastI = v;
channel->tremor_time |= 128;
}
update_tremor(channel);
break;
case IT_ARPEGGIO:
{
unsigned char v = entry->effectvalue;
/* XM files have no memory for arpeggio (000 = no effect)
* and we use lastJ for portamento down instead.
*/
if (!(sigdata->flags & IT_WAS_AN_XM)) {
if (v == 0)
v = channel->lastJ;
channel->lastJ = v;
}
channel->arpeggio = v;
}
break;
case IT_SET_CHANNEL_VOLUME:
if (sigdata->flags & IT_WAS_AN_XM)
channel->volume = MIN(entry->effectvalue, 64);
else if (entry->effectvalue <= 64)
channel->channelvolume = entry->effectvalue;
#ifdef VOLUME_OUT_OF_RANGE_SETS_MAXIMUM
else
channel->channelvolume = 64;
#endif
if (channel->playing)
channel->playing->channel_volume = channel->channelvolume;
break;
case IT_CHANNEL_VOLUME_SLIDE:
{
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->lastN;
channel->lastN = v;
if ((v & 0x0F) == 0) { /* Nx0 */
channel->channelvolslide = v >> 4;
} else if ((v & 0xF0) == 0) { /* N0x */
channel->channelvolslide = -v;
} else {
if ((v & 0x0F) == 0x0F) { /* NxF */
channel->channelvolume += v >> 4;
if (channel->channelvolume > 64) channel->channelvolume = 64;
} else if ((v & 0xF0) == 0xF0) { /* NFx */
channel->channelvolume -= v & 15;
if (channel->channelvolume > 64) channel->channelvolume = 0;
} else
break;
if (channel->playing)
channel->playing->channel_volume = channel->channelvolume;
}
}
break;
case IT_SET_SAMPLE_OFFSET:
{
unsigned char v = entry->effectvalue;
if (sigdata->flags & IT_WAS_A_MOD) {
if (v == 0) break;
} else {
if (v == 0)
v = channel->lastO;
channel->lastO = v;
}
/* Note: we set the offset even if tone portamento is
* specified. Impulse Tracker does the same.
*/
if (entry->mask & IT_ENTRY_NOTE) {
if (channel->playing) {
int offset = ((int)channel->high_offset << 16) | ((int)v << 8);
IT_PLAYING *playing = channel->playing;
IT_SAMPLE *sample = playing->sample;
int end;
if ((sample->flags & IT_SAMPLE_SUS_LOOP) && !(playing->flags & IT_PLAYING_SUSTAINOFF))
end = sample->sus_loop_end;
else if (sample->flags & IT_SAMPLE_LOOP)
end = sample->loop_end;
else
end = sample->length;
if (offset < end)
it_playing_reset_resamplers(playing, offset);
else if (sigdata->flags & IT_OLD_EFFECTS)
it_playing_reset_resamplers(playing, end);
}
}
}
break;
case IT_PANNING_SLIDE:
/** JULIEN: guess what? the docs are wrong! (how unusual ;)
* Pxy seems to memorize its previous value... and there
* might be other mistakes like that... (sigh!)
*/
/** ENTHEH: umm... but... the docs say that Pxy memorises its
* value... don't they? :o
*/
{
unsigned char v = entry->effectvalue;
int p = channel->truepan;
if (sigdata->flags & IT_WAS_AN_XM)
p >>= 6;
else {
p = (p + 128) >> 8;
channel->pan = p;
}
if (v == 0)
v = channel->lastP;
channel->lastP = v;
if ((v & 0x0F) == 0) { /* Px0 */
channel->panslide = v >> 4;
} else if ((v & 0xF0) == 0) { /* P0x */
channel->panslide = -v;
} else if ((v & 0x0F) == 0x0F) { /* PxF */
p += v >> 4;
} else if ((v & 0xF0) == 0xF0) { /* PFx */
p -= v & 15;
}
if (sigdata->flags & IT_WAS_AN_XM)
channel->truepan = 32 + MID(0, p, 255) * 64;
else if (!IT_IS_SURROUND(channel->pan)) {
channel->pan = p;
channel->truepan = p << 8;
}
}
break;
case IT_RETRIGGER_NOTE:
{
unsigned char v = entry->effectvalue;
if (sigdata->flags & IT_WAS_AN_XM) {
if ((v & 0x0F) == 0) v |= channel->lastQ & 0x0F;
if ((v & 0xF0) == 0) v |= channel->lastQ & 0xF0;
} else {
if (v == 0)
v = channel->lastQ;
}
channel->lastQ = v;
if ((v & 0x0F) == 0) v |= 0x01;
channel->retrig = v;
if (entry->mask & IT_ENTRY_NOTE) {
channel->retrig_tick = v & 0x0F;
/* Emulate a bug */
if (sigdata->flags & IT_WAS_AN_XM)
update_retrig(channel);
} else
update_retrig(channel);
}
break;
case IT_XM_RETRIGGER_NOTE:
channel->retrig_tick = channel->xm_retrig = entry->effectvalue;
if (entry->effectvalue == 0)
if (channel->playing) it_playing_reset_resamplers(channel->playing, 0);
break;
case IT_TREMOLO:
{
unsigned char speed = entry->effectvalue >> 4;
unsigned char depth = entry->effectvalue & 15;
if (speed == 0)
speed = channel->lastRspeed;
channel->lastRspeed = speed;
if (depth == 0)
depth = channel->lastRdepth;
channel->lastRdepth = depth;
if (channel->playing) {
channel->playing->tremolo_speed = speed;
channel->playing->tremolo_depth = depth;
}
}
break;
case IT_S:
{
/* channel->lastS was set in update_pattern_variables(). */
unsigned char effectvalue = channel->lastS;
switch (effectvalue >> 4) {
//case IT_S_SET_FILTER:
//case IT_S_SET_GLISSANDO_CONTROL:
//case IT_S_FINETUNE:
//case IT_S_SET_VIBRATO_WAVEFORM:
//case IT_S_SET_TREMOLO_WAVEFORM:
//case IT_S_SET_PANBRELLO_WAVEFORM:
/* Waveforms for commands S3x, S4x and S5x:
* 0: Sine wave
* 1: Ramp down
* 2: Square wave
* 3: Random wave
*/
case IT_S_FINE_PATTERN_DELAY:
sigrenderer->tick += effectvalue & 15;
break;
//case IT_S7:
case IT_S_SET_PAN:
ASSERT(!(sigdata->flags & IT_WAS_AN_XM));
channel->pan =
((effectvalue & 15) << 2) |
((effectvalue & 15) >> 2);
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
break;
case IT_S_SET_SURROUND_SOUND:
if ((effectvalue & 15) == 1) {
channel->pan = IT_SURROUND;
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
}
break;
case IT_S_SET_HIGH_OFFSET:
channel->high_offset = effectvalue & 15;
break;
//case IT_S_PATTERN_LOOP:
case IT_S_DELAYED_NOTE_CUT:
channel->note_cut_count = effectvalue & 15;
if (!channel->note_cut_count) {
if (sigdata->flags & IT_WAS_AN_XM)
channel->volume = 0;
else
channel->note_cut_count = 1;
}
break;
case IT_S_SET_MIDI_MACRO:
channel->SFmacro = effectvalue & 15;
break;
}
}
break;
case IT_SET_SONG_TEMPO:
{
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->lastW;
channel->lastW = v;
if (v < 0x10)
sigrenderer->temposlide = -v;
else if (v < 0x20)
sigrenderer->temposlide = v & 15;
else
sigrenderer->tempo = v;
}
break;
case IT_FINE_VIBRATO:
{
unsigned char speed = entry->effectvalue >> 4;
unsigned char depth = entry->effectvalue & 15;
if (speed == 0)
speed = channel->lastHspeed;
channel->lastHspeed = speed;
if (depth == 0)
depth = channel->lastHdepth;
else {
if (sigdata->flags & IT_OLD_EFFECTS)
depth <<= 1;
channel->lastHdepth = depth;
}
if (channel->playing) {
channel->playing->vibrato_speed = speed;
channel->playing->vibrato_depth = depth;
channel->playing->vibrato_n++;
}
}
break;
case IT_SET_GLOBAL_VOLUME:
if (entry->effectvalue <= 128)
sigrenderer->globalvolume = entry->effectvalue;
#ifdef VOLUME_OUT_OF_RANGE_SETS_MAXIMUM
else
sigrenderer->globalvolume = 128;
#endif
break;
case IT_GLOBAL_VOLUME_SLIDE:
{
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->lastW;
channel->lastW = v;
if ((v & 0x0F) == 0) { /* Wx0 */
sigrenderer->globalvolslide =
(sigdata->flags & IT_WAS_AN_XM) ? (v >> 4)*2 : (v >> 4);
} else if ((v & 0xF0) == 0) { /* W0x */
sigrenderer->globalvolslide =
(sigdata->flags & IT_WAS_AN_XM) ? (-v)*2 : (-v);
} else if ((v & 0x0F) == 0x0F) { /* WxF */
sigrenderer->globalvolume += v >> 4;
if (sigrenderer->globalvolume > 128) sigrenderer->globalvolume = 128;
} else if ((v & 0xF0) == 0xF0) { /* WFx */
sigrenderer->globalvolume -= v & 15;
if (sigrenderer->globalvolume > 128) sigrenderer->globalvolume = 0;
}
}
break;
case IT_SET_PANNING:
if (sigdata->flags & IT_WAS_AN_XM)
channel->truepan = 32 + entry->effectvalue*64;
else {
channel->pan = (entry->effectvalue + 2) >> 2;
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
}
break;
//case IT_PANBRELLO:
case IT_MIDI_MACRO:
{
IT_MIDI *midi = sigdata->midi ? sigdata->midi : &default_midi;
if (entry->effectvalue >= 0x80) {
int n = midi->Zmacrolen[entry->effectvalue-0x80];
int i;
for (i = 0; i < n; i++)
it_send_midi(sigrenderer, channel, midi->Zmacro[entry->effectvalue-0x80][i]);
} else {
int n = midi->SFmacrolen[channel->SFmacro];
int i, j;
for (i = 0, j = 1; i < n; i++, j <<= 1)
it_send_midi(sigrenderer, channel,
(unsigned char)(midi->SFmacroz[channel->SFmacro] & j ?
entry->effectvalue : midi->SFmacro[channel->SFmacro][i]));
}
}
break;
case IT_XM_SET_ENVELOPE_POSITION:
if (channel->playing && channel->playing->env_instrument) {
IT_ENVELOPE *envelope = &channel->playing->env_instrument->volume_envelope;
if (envelope->flags & IT_ENVELOPE_ON) {
IT_PLAYING_ENVELOPE *pe = &channel->playing->volume_envelope;
pe->tick = entry->effectvalue;
if (pe->tick >= envelope->node_t[envelope->n_nodes-1])
pe->tick = envelope->node_t[envelope->n_nodes-1];
pe->next_node = 0;
while (pe->tick > envelope->node_t[pe->next_node]) pe->next_node++;
xm_envelope_calculate_value(envelope, pe);
}
}
break;
}
}
if (!(sigdata->flags & IT_WAS_AN_XM))
post_process_it_volpan(sigrenderer, entry);
return 0;
}
static int process_it_note_data(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry)
{
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
// When tone portamento and instrument are specified:
// If Gxx is off:
// - same sample, do nothing but portamento
// - diff sample, retrigger all but keep current note+slide + do porta
// - if instrument is invalid, nothing; if sample is invalid, cut
// If Gxx is on:
// - same sample or new sample invalid, retrigger envelopes and initialise note value for portamento to 'seek' to
// - diff sample/inst, start using new envelopes
// When tone portamento is specified alone, sample won't change.
// TODO: consider what happens with instrument alone after all this...
if (entry->mask & (IT_ENTRY_NOTE | IT_ENTRY_INSTRUMENT)) {
if (entry->mask & IT_ENTRY_INSTRUMENT)
channel->instrument = entry->instrument;
instrument_to_sample(sigdata, channel);
if (channel->note < 120) {
if ((sigdata->flags & IT_USE_INSTRUMENTS) && channel->sample == 0)
return 1;
if (entry->mask & IT_ENTRY_INSTRUMENT)
get_default_volpan(sigdata, channel);
} else
it_retrigger_note(sigrenderer, channel); /* Stop the note */
}
/** WARNING: This is not ideal, since channel->playing might not get allocated owing to lack of memory... */
if (((entry->mask & IT_ENTRY_VOLPAN) && entry->volpan >= 193 && entry->volpan <= 202) ||
((entry->mask & IT_ENTRY_EFFECT) && (entry->effect == IT_TONE_PORTAMENTO || entry->effect == IT_VOLSLIDE_TONEPORTA)))
{
if (channel->playing && (entry->mask & IT_ENTRY_INSTRUMENT)) {
if (sigdata->flags & IT_COMPATIBLE_GXX)
it_compatible_gxx_retrigger(sigdata, channel);
else if ((!(sigdata->flags & IT_USE_INSTRUMENTS) ||
(channel->instrument >= 1 && channel->instrument <= sigdata->n_instruments)) &&
channel->sample != channel->playing->sampnum)
{
unsigned char note = channel->playing->note;
int slide = channel->playing->slide;
it_retrigger_note(sigrenderer, channel);
if (channel->playing) {
channel->playing->note = note;
channel->playing->slide = slide;
// Should we be preserving sample_vibrato_time? depth?
}
}
}
if ((entry->mask & IT_ENTRY_VOLPAN) && entry->volpan >= 193 && entry->volpan <= 202) {
/* Tone Portamento in the volume column */
static const unsigned char slidetable[] = {0, 1, 4, 8, 16, 32, 64, 96, 128, 255};
unsigned char v = slidetable[entry->volpan - 193];
if (sigdata->flags & IT_COMPATIBLE_GXX) {
if (v == 0)
v = channel->lastG;
channel->lastG = v;
} else {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
if ((entry->mask & IT_ENTRY_NOTE) || ((sigdata->flags & IT_COMPATIBLE_GXX) && (entry->mask & IT_ENTRY_INSTRUMENT))) {
if (channel->sample)
channel->destnote = channel->truenote;
else
channel->destnote = channel->note;
}
channel->toneporta = v << 4;
} else {
/* Tone Portamento in the effect column */
unsigned char v;
if (entry->effect == IT_TONE_PORTAMENTO)
v = entry->effectvalue;
else
v = 0;
if (sigdata->flags & IT_COMPATIBLE_GXX) {
if (v == 0)
v = channel->lastG;
channel->lastG = v;
} else {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
if ((entry->mask & IT_ENTRY_NOTE) || ((sigdata->flags & IT_COMPATIBLE_GXX) && (entry->mask & IT_ENTRY_INSTRUMENT))) {
if (channel->sample)
channel->destnote = channel->truenote;
else
channel->destnote = channel->note;
}
channel->toneporta = v << 4;
}
if (channel->playing) goto skip_start_note;
}
if ((entry->mask & IT_ENTRY_NOTE) ||
((entry->mask & IT_ENTRY_INSTRUMENT) && (!channel->playing || entry->instrument != channel->playing->instnum)))
{
if (channel->note < 120) {
get_true_pan(sigdata, channel);
it_retrigger_note(sigrenderer, channel);
}
}
skip_start_note:
if (entry->mask & IT_ENTRY_VOLPAN) {
if (entry->volpan <= 64) {
/* Volume */
channel->volume = entry->volpan;
} else if (entry->volpan <= 74) {
/* Fine volume slide up */
unsigned char v = entry->volpan - 65;
if (v == 0)
v = channel->lastvolslide;
channel->lastvolslide = v;
/* = effect DxF where x == entry->volpan - 65 */
channel->volume += v;
if (channel->volume > 64) channel->volume = 64;
} else if (entry->volpan <= 84) {
/* Fine volume slide down */
unsigned char v = entry->volpan - 75;
if (v == 0)
v = channel->lastvolslide;
channel->lastvolslide = v;
/* = effect DFx where x == entry->volpan - 75 */
channel->volume -= v;
if (channel->volume > 64) channel->volume = 0;
} else if (entry->volpan < 128) {
/* Volume slide up */
/* Volume slide down */
/* Portamento down */
/* Portamento up */
} else if (entry->volpan <= 192) {
/* Pan */
channel->pan = entry->volpan - 128;
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
}
/* else */
/* Tone Portamento */
/* Vibrato */
}
return 0;
}
static void retrigger_xm_envelopes(IT_PLAYING *playing)
{
playing->volume_envelope.next_node = 0;
playing->volume_envelope.tick = -1;
playing->pan_envelope.next_node = 0;
playing->pan_envelope.tick = -1;
playing->fadeoutcount = 1024;
}
static void process_xm_note_data(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry)
{
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_INSTRUMENT) {
channel->instrument = entry->instrument;
instrument_to_sample(sigdata, channel);
if (channel->playing) {
/* Retrigger vol/pan envelopes if enabled, and cancel fadeout.
* Also reset vol/pan to that of _original_ instrument.
*/
channel->playing->flags &= ~(IT_PLAYING_SUSTAINOFF | IT_PLAYING_FADING);
it_playing_update_resamplers(channel->playing);
channel->volume = channel->playing->sample->default_volume;
if (!(sigdata->flags & IT_WAS_A_MOD))
channel->truepan = 32 + channel->playing->sample->default_pan*64;
retrigger_xm_envelopes(channel->playing);
}
}
if (!((entry->mask & IT_ENTRY_EFFECT) && entry->effect == IT_XM_KEY_OFF && entry->effectvalue == 0) &&
(entry->mask & IT_ENTRY_NOTE))
{
if (!(entry->mask & IT_ENTRY_INSTRUMENT))
instrument_to_sample(sigdata, channel);
if (channel->note >= 120)
xm_note_off(sigdata, channel);
else if (channel->sample == 0) {
/** If we get here, one of the following is the case:
** 1. The instrument has never been specified on this channel.
** 2. The specified instrument is invalid.
** 3. The instrument has no sample mapped to the selected note.
** What should happen?
**
** Experimentation shows that any existing note stops and cannot
** be brought back. A subsequent instrument change fixes that.
**/
if (channel->playing) {
free(channel->playing);
channel->playing = NULL;
}
return;
} else if (channel->playing && (entry->mask & IT_ENTRY_VOLPAN) && ((entry->volpan>>4) == 0xF)) {
/* Don't retrigger note; portamento in the volume column. */
} else if (channel->playing &&
(entry->mask & IT_ENTRY_EFFECT) &&
(entry->effect == IT_TONE_PORTAMENTO ||
entry->effect == IT_VOLSLIDE_TONEPORTA)) {
/* Don't retrigger note; portamento in the effects column. */
} else {
channel->destnote = IT_NOTE_OFF;
if (!channel->playing) {
channel->playing = malloc(sizeof(*channel->playing));
if (!channel->playing)
return;
// Adding the following seems to do the trick for the case where a piece starts with an instrument alone and then some notes alone.
retrigger_xm_envelopes(channel->playing);
}
channel->playing->flags = 0;
channel->playing->channel = channel;
channel->playing->sample = &sigdata->sample[channel->sample-1];
if (sigdata->flags & IT_USE_INSTRUMENTS)
channel->playing->instrument = &sigdata->instrument[channel->instrument-1];
else
channel->playing->instrument = NULL;
channel->playing->env_instrument = channel->playing->instrument;
channel->playing->sampnum = channel->sample;
channel->playing->instnum = channel->instrument;
channel->playing->channel_volume = channel->channelvolume;
channel->playing->note = channel->truenote;
channel->playing->filter_cutoff = 127;
channel->playing->filter_resonance = 0;
channel->playing->true_filter_cutoff = 127 << 8;
channel->playing->true_filter_resonance = 0;
channel->playing->vibrato_speed = 0;
channel->playing->vibrato_depth = 0;
channel->playing->vibrato_n = 0;
channel->playing->vibrato_time = 0;
channel->playing->tremolo_speed = 0;
channel->playing->tremolo_depth = 0;
channel->playing->tremolo_time = 0;
channel->playing->sample_vibrato_time = 0;
channel->playing->sample_vibrato_depth = 0;
channel->playing->slide = 0;
it_reset_filter_state(&channel->playing->filter_state[0]); // Are these
it_reset_filter_state(&channel->playing->filter_state[1]); // necessary?
it_playing_reset_resamplers(channel->playing, 0);
/** WARNING - is everything initialised? */
}
}
if (!((entry->mask & IT_ENTRY_EFFECT) && entry->effect == IT_XM_KEY_OFF && entry->effectvalue == 0) &&
(entry->mask & (IT_ENTRY_NOTE | IT_ENTRY_INSTRUMENT)) == (IT_ENTRY_NOTE | IT_ENTRY_INSTRUMENT))
{
if (channel->playing) retrigger_xm_envelopes(channel->playing);
get_default_volpan(sigdata, channel);
}
if ((entry->mask & IT_ENTRY_VOLPAN) && ((entry->volpan>>4) == 0xF)) {
/* Tone Portamento */
unsigned char v = (entry->volpan & 15) << 4;
if (v == 0)
v = channel->lastG;
channel->lastG = v;
if (entry->mask & IT_ENTRY_NOTE)
if (channel->sample)
channel->destnote = channel->truenote;
channel->toneporta = v << 4;
} else if ((entry->mask & IT_ENTRY_EFFECT) &&
(entry->effect == IT_TONE_PORTAMENTO ||
entry->effect == IT_VOLSLIDE_TONEPORTA)) {
unsigned char v;
if (entry->effect == IT_TONE_PORTAMENTO)
v = entry->effectvalue;
else
v = 0;
if (v == 0)
v = channel->lastG;
channel->lastG = v;
if (entry->mask & IT_ENTRY_NOTE)
if (channel->sample)
channel->destnote = channel->truenote;
channel->toneporta = v << 4;
}
if (entry->mask & IT_ENTRY_VOLPAN) {
int effect = entry->volpan >> 4;
int value = entry->volpan & 15;
switch (effect) {
case 0x6: /* Volume slide down */
channel->xm_volslide = -value;
break;
case 0x7: /* Volume slide up */
channel->xm_volslide = value;
break;
case 0x8: /* Fine volume slide down */
channel->volume -= value;
if (channel->volume > 64) channel->volume = 0;
break;
case 0x9: /* Fine volume slide up */
channel->volume += value;
if (channel->volume > 64) channel->volume = 64;
break;
case 0xA: /* Set vibrato speed */
if (value)
channel->lastHspeed = value;
if (channel->playing)
channel->playing->vibrato_speed = channel->lastHspeed;
break;
case 0xB: /* Vibrato */
if (value)
channel->lastHdepth = value << 2; /** WARNING: correct ? */
if (channel->playing) {
channel->playing->vibrato_depth = channel->lastHdepth;
channel->playing->vibrato_speed = channel->lastHspeed;
channel->playing->vibrato_n++;
}
break;
case 0xC: /* Set panning */
channel->truepan = 32 + value*(17*64);
break;
case 0xD: /* Pan slide left */
/* -128 is a special case for emulating a 'feature' in FT2.
* As soon as effects are processed, it goes hard left.
*/
channel->panslide = value ? -value : -128;
break;
case 0xE: /* Pan slide Right */
channel->panslide = value;
break;
case 0xF: /* Tone porta */
break;
default: /* Volume */
channel->volume = entry->volpan - 0x10;
break;
}
}
}
/* This function assumes !IT_IS_END_ROW(entry). */
static int process_note_data(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry, int ignore_cxx)
{
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
if (sigdata->flags & IT_WAS_AN_XM)
process_xm_note_data(sigrenderer, entry);
else
if (process_it_note_data(sigrenderer, entry)) return 0;
return process_effects(sigrenderer, entry, ignore_cxx);
}
static int process_entry(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry, int ignore_cxx)
{
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_NOTE)
channel->note = entry->note;
if ((entry->mask & IT_ENTRY_EFFECT) && entry->effect == IT_S) {
/* channel->lastS was set in update_pattern_variables(). */
unsigned char effectvalue = channel->lastS;
if (effectvalue >> 4 == IT_S_NOTE_DELAY) {
channel->note_delay_count = effectvalue & 15;
if (channel->note_delay_count == 0)
channel->note_delay_count = 1;
channel->note_delay_entry = entry;
return 0;
}
}
return process_note_data(sigrenderer, entry, ignore_cxx);
}
static void update_tick_counts(DUMB_IT_SIGRENDERER *sigrenderer)
{
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
if (channel->key_off_count) {
channel->key_off_count--;
if (channel->key_off_count == 0)
xm_note_off(sigrenderer->sigdata, channel);
} else if (channel->note_cut_count) {
channel->note_cut_count--;
if (channel->note_cut_count == 0) {
if (sigrenderer->sigdata->flags & IT_WAS_AN_XM)
channel->volume = 0;
else if (channel->playing) {
free(channel->playing);
channel->playing = NULL;
}
}
} else if (channel->note_delay_count) {
channel->note_delay_count--;
if (channel->note_delay_count == 0)
process_note_data(sigrenderer, channel->note_delay_entry, 0);
/* Don't bother checking the return value; if the note
* was delayed, there can't have been a speed=0.
*/
}
}
}
static int envelope_get_y(IT_ENVELOPE *envelope, IT_PLAYING_ENVELOPE *pe)
{
#if 1
(void)envelope; //TODO: remove the parameter
return pe->value;
#else
int ys, ye;
int ts, te;
int t;
if (pe->next_node <= 0)
return envelope->node_y[0] << IT_ENVELOPE_SHIFT;
if (pe->next_node >= envelope->n_nodes)
return envelope->node_y[envelope->n_nodes-1] << IT_ENVELOPE_SHIFT;
ys = envelope->node_y[pe->next_node-1] << IT_ENVELOPE_SHIFT;
ts = envelope->node_t[pe->next_node-1];
te = envelope->node_t[pe->next_node];
if (ts == te)
return ys;
ye = envelope->node_y[pe->next_node] << IT_ENVELOPE_SHIFT;
t = pe->tick;
return ys + (ye - ys) * (t - ts) / (te - ts);
#endif
}
#if 0
static int it_envelope_end(IT_PLAYING *playing, IT_ENVELOPE *envelope, IT_PLAYING_ENVELOPE *pe)
{
if (pe->next_node >= envelope->n_nodes)
return 1;
if (pe->tick < envelope->node_t[pe->next_node]) return 0;
if ((envelope->flags & IT_ENVELOPE_LOOP_ON) &&
envelope->loop_end >= pe->next_node &&
envelope->node_t[envelope->loop_end] <= pe->tick) return 0;
if ((envelope->flags & IT_ENVELOPE_SUSTAIN_LOOP) &&
!(playing->flags & IT_PLAYING_SUSTAINOFF) &&
envelope->sus_loop_end >= pe->next_node &&
envelope->node_t[envelope->sus_loop_end] <= pe->tick) return 0;
if (envelope->node_t[envelope->n_nodes-1] <= pe->tick) return 1;
return 0;
}
#endif
/* Returns 1 when fading should be initiated for a volume envelope. */
static int update_it_envelope(IT_PLAYING *playing, IT_ENVELOPE *envelope, IT_PLAYING_ENVELOPE *pe)
{
if (!(envelope->flags & IT_ENVELOPE_ON))
return 0;
ASSERT(envelope->n_nodes > 0);
if (pe->next_node <= 0)
pe->value = envelope->node_y[0] << IT_ENVELOPE_SHIFT;
else if (pe->next_node >= envelope->n_nodes) {
pe->value = envelope->node_y[envelope->n_nodes-1] << IT_ENVELOPE_SHIFT;
return 1;
} else {
int ys = envelope->node_y[pe->next_node-1] << IT_ENVELOPE_SHIFT;
int ts = envelope->node_t[pe->next_node-1];
int te = envelope->node_t[pe->next_node];
if (ts == te)
pe->value = ys;
else {
int ye = envelope->node_y[pe->next_node] << IT_ENVELOPE_SHIFT;
int t = pe->tick;
pe->value = ys + (ye - ys) * (t - ts) / (te - ts);
}
}
pe->tick++;
while (pe->tick >= envelope->node_t[pe->next_node]) {
pe->next_node++;
if ((envelope->flags & IT_ENVELOPE_SUSTAIN_LOOP) && !(playing->flags & IT_PLAYING_SUSTAINOFF)) {
if (pe->next_node > envelope->sus_loop_end) {
pe->next_node = envelope->sus_loop_start;
ASSERT(pe->next_node < envelope->n_nodes);
pe->tick = envelope->node_t[envelope->sus_loop_start];
return 0;
}
} else if (envelope->flags & IT_ENVELOPE_LOOP_ON) {
if (pe->next_node > envelope->loop_end) {
pe->next_node = envelope->loop_start;
ASSERT(pe->next_node < envelope->n_nodes);
pe->tick = envelope->node_t[envelope->loop_start];
return 0;
}
}
if (pe->next_node >= envelope->n_nodes)
return 0;
}
return 0;
}
static void update_it_envelopes(IT_PLAYING *playing)
{
IT_ENVELOPE *envelope = &playing->env_instrument->volume_envelope;
IT_PLAYING_ENVELOPE *pe = &playing->volume_envelope;
if (update_it_envelope(playing, envelope, pe)) {
playing->flags |= IT_PLAYING_FADING;
if (pe->value == 0)
playing->flags |= IT_PLAYING_DEAD;
}
update_it_envelope(playing, &playing->env_instrument->pan_envelope, &playing->pan_envelope);
update_it_envelope(playing, &playing->env_instrument->pitch_envelope, &playing->pitch_envelope);
}
static int xm_envelope_is_sustaining(IT_PLAYING *playing, IT_ENVELOPE *envelope, IT_PLAYING_ENVELOPE *pe)
{
if ((envelope->flags & IT_ENVELOPE_SUSTAIN_LOOP) && !(playing->flags & IT_PLAYING_SUSTAINOFF))
if (envelope->sus_loop_start < envelope->n_nodes)
if (pe->tick == envelope->node_t[envelope->sus_loop_start])
return 1;
return 0;
}
static void update_xm_envelope(IT_PLAYING *playing, IT_ENVELOPE *envelope, IT_PLAYING_ENVELOPE *pe)
{
if (!(envelope->flags & IT_ENVELOPE_ON))
return;
if (xm_envelope_is_sustaining(playing, envelope, pe))
return;
if (pe->tick >= envelope->node_t[envelope->n_nodes-1])
return;
pe->tick++;
/* pe->next_node must be kept up to date for envelope_get_y(). */
while (pe->tick > envelope->node_t[pe->next_node])
pe->next_node++;
if ((envelope->flags & IT_ENVELOPE_LOOP_ON) && envelope->loop_end < envelope->n_nodes) {
if (pe->tick == envelope->node_t[envelope->loop_end]) {
pe->next_node = MID(0, envelope->loop_start, envelope->n_nodes - 1);
pe->tick = envelope->node_t[pe->next_node];
}
}
xm_envelope_calculate_value(envelope, pe);
}
static void update_xm_envelopes(IT_PLAYING *playing)
{
update_xm_envelope(playing, &playing->env_instrument->volume_envelope, &playing->volume_envelope);
update_xm_envelope(playing, &playing->env_instrument->pan_envelope, &playing->pan_envelope);
}
static void update_fadeout(DUMB_IT_SIGDATA *sigdata, IT_PLAYING *playing)
{
if (playing->flags & IT_PLAYING_FADING) {
playing->fadeoutcount -= playing->env_instrument->fadeout;
if (playing->fadeoutcount <= 0) {
playing->fadeoutcount = 0;
if (!(sigdata->flags & IT_WAS_AN_XM))
playing->flags |= IT_PLAYING_DEAD;
}
}
}
static void process_playing(DUMB_IT_SIGDATA *sigdata, IT_PLAYING *playing)
{
if (playing->instrument) {
if (sigdata->flags & IT_WAS_AN_XM)
update_xm_envelopes(playing);
else
update_it_envelopes(playing);
update_fadeout(sigdata, playing);
}
//Calculate final volume if required
//Calculate final pan if required
if (sigdata->flags & IT_WAS_AN_XM) {
/* 'depth' is used to store the tick number for XM files. */
if (playing->sample_vibrato_depth < playing->sample->vibrato_rate)
playing->sample_vibrato_depth++;
} else {
playing->sample_vibrato_depth += playing->sample->vibrato_rate;
if (playing->sample_vibrato_depth > playing->sample->vibrato_depth << 8)
playing->sample_vibrato_depth = playing->sample->vibrato_depth << 8;
}
playing->sample_vibrato_time += playing->sample->vibrato_speed;
}
static void process_all_playing(DUMB_IT_SIGRENDERER *sigrenderer)
{
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
IT_PLAYING *playing = channel->playing;
if (playing) {
int vibrato_shift = it_sine[playing->vibrato_time];
vibrato_shift *= playing->vibrato_n;
vibrato_shift *= playing->vibrato_depth;
vibrato_shift >>= 4;
if (sigdata->flags & IT_OLD_EFFECTS)
vibrato_shift = -vibrato_shift;
playing->volume = channel->volume;
playing->pan = channel->truepan;
if (sigdata->flags & IT_LINEAR_SLIDES) {
int currpitch = ((playing->note - 60) << 8) + playing->slide
+ vibrato_shift;
/* We add a feature here, which is that of keeping the pitch
* within range. Otherwise it crashes. Trust me. It happened.
* The limit 32768 gives almost 11 octaves either way.
*/
if (currpitch < -32768)
currpitch = -32768;
else if (currpitch > 32767)
currpitch = 32767;
playing->delta = (float)pow(DUMB_PITCH_BASE, currpitch);
playing->delta *= playing->sample->C5_speed / 65536.0f;
} else {
int slide = playing->slide + vibrato_shift;
playing->delta = (float)pow(DUMB_SEMITONE_BASE, 60 - playing->note);
/* playing->delta is 1.0 for C-5, 0.5 for C-6, etc. */
playing->delta *= 1.0f / playing->sample->C5_speed;
playing->delta -= slide / AMIGA_DIVISOR;
if (playing->delta < (1.0f / 65536.0f) / 32768.0f) {
// Should XM notes die if Amiga slides go out of range?
playing->flags |= IT_PLAYING_DEAD;
continue;
}
playing->delta = (1.0f / 65536.0f) / playing->delta;
}
playing->delta *= (float)pow(DUMB_SEMITONE_BASE, channel->arpeggio >> 8);
playing->filter_cutoff = channel->filter_cutoff;
playing->filter_resonance = channel->filter_resonance;
}
}
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing) {
process_playing(sigdata, sigrenderer->channel[i].playing);
if (!(sigdata->flags & IT_WAS_AN_XM)) {
//if ((sigrenderer->channel[i].playing->flags & (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) == (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) {
// This change was made so Gxx would work correctly when a note faded out or whatever. Let's hope nothing else was broken by it.
if (sigrenderer->channel[i].playing->flags & IT_PLAYING_DEAD) {
free(sigrenderer->channel[i].playing);
sigrenderer->channel[i].playing = NULL;
}
}
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]) {
process_playing(sigdata, sigrenderer->playing[i]);
if (sigrenderer->playing[i]->flags & IT_PLAYING_DEAD) {
free(sigrenderer->playing[i]);
sigrenderer->playing[i] = NULL;
}
}
}
}
static int process_tick(DUMB_IT_SIGRENDERER *sigrenderer)
{
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
// Set note vol/freq to vol/freq set for each channel
if (sigrenderer->speed && --sigrenderer->tick == 0) {
reset_tick_counts(sigrenderer);
sigrenderer->tick = sigrenderer->speed;
sigrenderer->rowcount--;
if (sigrenderer->rowcount == 0) {
sigrenderer->rowcount = 1;
sigrenderer->processrow++;
if (sigrenderer->processrow >= sigrenderer->n_rows) {
IT_PATTERN *pattern;
int n;
int processorder = sigrenderer->processorder;
if (sigrenderer->processrow == 0xFFFE + 1) { /* It was incremented above! */
sigrenderer->processrow = sigrenderer->breakrow;
sigrenderer->breakrow = 0;
for (n = 0; n < DUMB_IT_N_CHANNELS; n++) sigrenderer->channel[n].pat_loop_end_row = 0;
} else
sigrenderer->processrow = sigrenderer->breakrow;
if (sigrenderer->processorder == 0xFFFF)
sigrenderer->processorder = sigrenderer->order - 1;
for (;;) {
sigrenderer->processorder++;
if (sigrenderer->processorder >= sigdata->n_orders) {
sigrenderer->processorder = sigdata->restart_position;
if (sigrenderer->processorder >= sigdata->n_orders) {
/* Restarting beyond end. We'll loop for now. */
sigrenderer->processorder = -1;
continue;
}
}
n = sigdata->order[sigrenderer->processorder];
if (n < sigdata->n_patterns)
break;
#ifdef INVALID_ORDERS_END_SONG
if (n != IT_ORDER_SKIP)
sigrenderer->processorder = -1;
#else
if (n == IT_ORDER_END)
sigrenderer->processorder = -1;
#endif
}
pattern = &sigdata->pattern[n];
n = sigrenderer->n_rows;
sigrenderer->n_rows = pattern->n_rows;
if (sigrenderer->processrow >= sigrenderer->n_rows)
sigrenderer->processrow = 0;
/** WARNING - everything pertaining to a new pattern initialised? */
sigrenderer->entry = sigrenderer->entry_start = pattern->entry;
sigrenderer->entry_end = sigrenderer->entry + pattern->n_entries;
/* If n_rows was 0, we're only just starting. Don't do anything weird here. */
if (n && (processorder == 0xFFFF ? sigrenderer->order > sigrenderer->processorder : sigrenderer->order >= sigrenderer->processorder)) {
if (sigrenderer->callbacks->loop) {
if ((*sigrenderer->callbacks->loop)(sigrenderer->callbacks->loop_data))
return 1;
if (sigrenderer->speed == 0)
goto speed0; /* I love goto */
}
}
sigrenderer->order = sigrenderer->processorder;
n = sigrenderer->processrow;
while (n) {
while (sigrenderer->entry < sigrenderer->entry_end) {
if (IT_IS_END_ROW(sigrenderer->entry)) {
sigrenderer->entry++;
break;
}
sigrenderer->entry++;
}
n--;
}
sigrenderer->row = sigrenderer->processrow;
} else {
if (sigrenderer->entry) {
while (sigrenderer->entry < sigrenderer->entry_end) {
if (IT_IS_END_ROW(sigrenderer->entry)) {
sigrenderer->entry++;
break;
}
sigrenderer->entry++;
}
sigrenderer->row++;
} else {
sigrenderer->entry = sigrenderer->entry_start;
sigrenderer->row = 0;
}
}
reset_effects(sigrenderer);
{
IT_ENTRY *entry = sigrenderer->entry;
int ignore_cxx = 0;
while (entry < sigrenderer->entry_end && !IT_IS_END_ROW(entry))
ignore_cxx |= update_pattern_variables(sigrenderer, entry++);
entry = sigrenderer->entry;
while (entry < sigrenderer->entry_end && !IT_IS_END_ROW(entry))
if (process_entry(sigrenderer, entry++, sigdata->flags & IT_WAS_AN_XM ? 0 : ignore_cxx))
return 1;
}
if (!(sigdata->flags & IT_OLD_EFFECTS))
update_smooth_effects(sigrenderer);
} else {
{
IT_ENTRY *entry = sigrenderer->entry;
while (entry < sigrenderer->entry_end && !IT_IS_END_ROW(entry))
process_effects(sigrenderer, entry++, 0);
/* Don't bother checking the return value; if there
* was a pattern delay, there can't be a speed=0.
*/
}
update_effects(sigrenderer);
}
} else {
speed0:
update_effects(sigrenderer);
update_tick_counts(sigrenderer);
}
process_all_playing(sigrenderer);
{
LONG_LONG t = sigrenderer->sub_time_left + ((LONG_LONG)TICK_TIME_DIVIDEND << 16) / sigrenderer->tempo;
sigrenderer->time_left += (int)(t >> 16);
sigrenderer->sub_time_left = (int)t & 65535;
}
return 0;
}
int dumb_it_max_to_mix = 64;
static float calculate_volume(DUMB_IT_SIGRENDERER *sigrenderer, IT_PLAYING *playing, float volume)
{
if (volume != 0) {
int vol;
if (playing->channel->flags & IT_CHANNEL_MUTED)
return 0;
if ((playing->channel->tremor_time & 192) == 128)
return 0;
vol = it_sine[playing->tremolo_time];
vol *= playing->tremolo_depth;
vol = (playing->volume << 5) + vol;
if (vol <= 0)
return 0;
if (vol > 64 << 5)
vol = 64 << 5;
volume *= vol; /* 64 << 5 */
volume *= playing->sample->global_volume; /* 64 */
volume *= playing->channel_volume; /* 64 */
volume *= sigrenderer->globalvolume; /* 128 */
volume *= sigrenderer->sigdata->mixing_volume; /* 128 */
volume *= 1.0f / ((64 << 5) * 64.0f * 64.0f * 128.0f * 128.0f);
if (volume && playing->instrument) {
if (playing->env_instrument->volume_envelope.flags & IT_ENVELOPE_ON) {
volume *= envelope_get_y(&playing->env_instrument->volume_envelope, &playing->volume_envelope);
volume *= 1.0f / (64 << IT_ENVELOPE_SHIFT);
}
volume *= playing->instrument->global_volume; /* 128 */
volume *= playing->fadeoutcount; /* 1024 */
volume *= 1.0f / (128.0f * 1024.0f);
}
}
return volume;
}
static int apply_pan_envelope(IT_PLAYING *playing)
{
int pan = playing->pan;
if (pan <= 64 << IT_ENVELOPE_SHIFT && playing->env_instrument && (playing->env_instrument->pan_envelope.flags & IT_ENVELOPE_ON)) {
int p = envelope_get_y(&playing->env_instrument->pan_envelope, &playing->pan_envelope);
if (pan > 32 << IT_ENVELOPE_SHIFT)
p *= (64 << IT_ENVELOPE_SHIFT) - pan;
else
p *= pan;
pan += p >> (5 + IT_ENVELOPE_SHIFT);
}
return pan;
}
/* Note: if a click remover is provided, and store_end_sample is set, then
* the end point will be computed twice. This situation should not arise.
*/
static long render_playing(DUMB_IT_SIGRENDERER *sigrenderer, IT_PLAYING *playing, float volume, float delta, long pos, long size, sample_t **samples, int store_end_sample, int *left_to_mix)
{
int bits;
int pan;
float span; /* separated pan, range -1 to 1; garbage for surround */
long size_rendered;
if (playing->flags & IT_PLAYING_DEAD)
return 0;
if (*left_to_mix <= 0)
volume = 0;
bits = playing->sample->flags & IT_SAMPLE_16BIT ? 16 : 8;
pan = apply_pan_envelope(playing);
span = (pan - (32<<8)) * sigrenderer->sigdata->pan_separation * (1.0f / ((32<<8) * 128));
if (volume == 0) {
if (playing->sample->flags & IT_SAMPLE_STEREO)
size_rendered = dumb_resample_n_2_1(bits, &playing->resampler, NULL, size, 0, 0, delta);
else
size_rendered = dumb_resample_n_1_1(bits, &playing->resampler, NULL, size, 0, delta);
} else {
if (sigrenderer->n_channels == 2) {
float lvol, rvol;
lvol = volume;
if (!IT_IS_SURROUND_SHIFTED(pan)) lvol *= 1.0f - span;
rvol = -lvol;
if (!IT_IS_SURROUND_SHIFTED(pan)) rvol += 2.0f * volume;
if (playing->sample->flags & IT_SAMPLE_STEREO) {
if (sigrenderer->click_remover) {
sample_t click[2];
dumb_resample_get_current_sample_n_2_2(bits, &playing->resampler, lvol, rvol, click);
dumb_record_click(sigrenderer->click_remover[0], pos, click[0]);
dumb_record_click(sigrenderer->click_remover[1], pos, click[1]);
}
size_rendered = dumb_resample_n_2_2(bits, &playing->resampler, samples[0] + pos*2, size, lvol, rvol, delta);
if (store_end_sample) {
sample_t click[2];
dumb_resample_get_current_sample_n_2_2(bits, &playing->resampler, lvol, rvol, click);
samples[0][(pos + size_rendered) * 2] = click[0];
samples[0][(pos + size_rendered) * 2 + 1] = click[1];
}
if (sigrenderer->click_remover) {
sample_t click[2];
dumb_resample_get_current_sample_n_2_2(bits, &playing->resampler, lvol, rvol, click);
dumb_record_click(sigrenderer->click_remover[0], pos + size_rendered, -click[0]);
dumb_record_click(sigrenderer->click_remover[1], pos + size_rendered, -click[1]);
}
} else {
if (sigrenderer->click_remover) {
sample_t click[2];
dumb_resample_get_current_sample_n_1_2(bits, &playing->resampler, lvol, rvol, click);
dumb_record_click(sigrenderer->click_remover[0], pos, click[0]);
dumb_record_click(sigrenderer->click_remover[1], pos, click[1]);
}
size_rendered = dumb_resample_n_1_2(bits, &playing->resampler, samples[0] + pos*2, size, lvol, rvol, delta);
if (store_end_sample) {
sample_t click[2];
dumb_resample_get_current_sample_n_1_2(bits, &playing->resampler, lvol, rvol, click);
samples[0][(pos + size_rendered) * 2] = click[0];
samples[0][(pos + size_rendered) * 2 + 1] = click[1];
}
if (sigrenderer->click_remover) {
sample_t click[2];
dumb_resample_get_current_sample_n_1_2(bits, &playing->resampler, lvol, rvol, click);
dumb_record_click(sigrenderer->click_remover[0], pos + size_rendered, -click[0]);
dumb_record_click(sigrenderer->click_remover[1], pos + size_rendered, -click[1]);
}
}
} else {
if (playing->sample->flags & IT_SAMPLE_STEREO) {
float lvol, rvol;
lvol = 0.5f * volume;
if (!IT_IS_SURROUND_SHIFTED(pan)) lvol *= 1.0f - span;
rvol = lvol;
if (!IT_IS_SURROUND_SHIFTED(pan)) rvol = volume - rvol;
if (sigrenderer->click_remover) {
sample_t click;
dumb_resample_get_current_sample_n_2_1(bits, &playing->resampler, lvol, rvol, &click);
dumb_record_click(sigrenderer->click_remover[0], pos, click);
}
size_rendered = dumb_resample_n_2_1(bits, &playing->resampler, samples[0] + pos, size, lvol, rvol, delta);
if (store_end_sample)
dumb_resample_get_current_sample_n_2_1(bits, &playing->resampler, lvol, rvol, &samples[0][pos + size_rendered]);
if (sigrenderer->click_remover) {
sample_t click;
dumb_resample_get_current_sample_n_2_1(bits, &playing->resampler, lvol, rvol, &click);
dumb_record_click(sigrenderer->click_remover[0], pos + size_rendered, -click);
}
} else {
if (sigrenderer->click_remover) {
sample_t click;
dumb_resample_get_current_sample_n_1_1(bits, &playing->resampler, volume, &click);
dumb_record_click(sigrenderer->click_remover[0], pos, click);
}
size_rendered = dumb_resample_n_1_1(bits, &playing->resampler, samples[0] + pos, size, volume, delta);
if (store_end_sample)
dumb_resample_get_current_sample_n_1_1(bits, &playing->resampler, volume, &samples[0][pos + size_rendered]);
if (sigrenderer->click_remover) {
sample_t click;
dumb_resample_get_current_sample_n_1_1(bits, &playing->resampler, volume, &click);
dumb_record_click(sigrenderer->click_remover[0], pos + size_rendered, -click);
}
}
}
(*left_to_mix)--;
}
if (playing->resampler.dir == 0)
playing->flags |= IT_PLAYING_DEAD;
return size_rendered;
}
typedef struct IT_TO_MIX
{
IT_PLAYING *playing;
float volume;
}
IT_TO_MIX;
static int it_to_mix_compare(const void *e1, const void *e2)
{
if (((const IT_TO_MIX *)e1)->volume > ((const IT_TO_MIX *)e2)->volume)
return -1;
if (((const IT_TO_MIX *)e1)->volume < ((const IT_TO_MIX *)e2)->volume)
return 1;
return 0;
}
static void apply_pitch_modifications(DUMB_IT_SIGDATA *sigdata, IT_PLAYING *playing, float *delta, int *cutoff)
{
{
int sample_vibrato_shift = it_sine[playing->sample_vibrato_time];
if (sigdata->flags & IT_WAS_AN_XM) {
int depth = playing->sample->vibrato_depth; /* True depth */
if (playing->sample->vibrato_rate) {
depth *= playing->sample_vibrato_depth; /* Tick number */
depth /= playing->sample->vibrato_rate; /* XM sweep */
}
sample_vibrato_shift *= depth;
} else
sample_vibrato_shift *= playing->sample_vibrato_depth >> 8;
sample_vibrato_shift >>= 4;
*delta *= (float)pow(DUMB_PITCH_BASE, sample_vibrato_shift);
}
if (playing->env_instrument &&
(playing->env_instrument->pitch_envelope.flags & IT_ENVELOPE_ON))
{
int p = envelope_get_y(&playing->env_instrument->pitch_envelope, &playing->pitch_envelope);
if (playing->env_instrument->pitch_envelope.flags & IT_ENVELOPE_PITCH_IS_FILTER)
*cutoff = (*cutoff * (p+(32<<IT_ENVELOPE_SHIFT))) >> (6 + IT_ENVELOPE_SHIFT);
else
*delta *= (float)pow(DUMB_PITCH_BASE, p >> (IT_ENVELOPE_SHIFT - 7));
}
}
static void render(DUMB_IT_SIGRENDERER *sigrenderer, float volume, float delta, long pos, long size, sample_t **samples)
{
int i;
int n_to_mix = 0;
IT_TO_MIX to_mix[DUMB_IT_TOTAL_CHANNELS];
int left_to_mix = dumb_it_max_to_mix;
sample_t **samples_to_filter = NULL;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing && !(sigrenderer->channel[i].playing->flags & IT_PLAYING_DEAD)) {
to_mix[n_to_mix].playing = sigrenderer->channel[i].playing;
to_mix[n_to_mix].volume = volume == 0 ? 0 : calculate_volume(sigrenderer, sigrenderer->channel[i].playing, volume);
n_to_mix++;
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]) { /* Won't be dead; it would have been freed. */
to_mix[n_to_mix].playing = sigrenderer->playing[i];
to_mix[n_to_mix].volume = volume == 0 ? 0 : calculate_volume(sigrenderer, sigrenderer->playing[i], volume);
n_to_mix++;
}
}
if (volume != 0)
qsort(to_mix, n_to_mix, sizeof(IT_TO_MIX), &it_to_mix_compare);
for (i = 0; i < n_to_mix; i++) {
IT_PLAYING *playing = to_mix[i].playing;
float note_delta = delta * playing->delta;
int cutoff = playing->filter_cutoff << IT_ENVELOPE_SHIFT;
apply_pitch_modifications(sigrenderer->sigdata, playing, &note_delta, &cutoff);
if (cutoff != 127 << IT_ENVELOPE_SHIFT || playing->filter_resonance != 0) {
playing->true_filter_cutoff = cutoff;
playing->true_filter_resonance = playing->filter_resonance;
}
if (to_mix[i].volume && (playing->true_filter_cutoff != 127 << IT_ENVELOPE_SHIFT || playing->true_filter_resonance != 0)) {
if (!samples_to_filter) {
samples_to_filter = allocate_sample_buffer(sigrenderer->n_channels, size + 1);
if (!samples_to_filter) {
render_playing(sigrenderer, playing, 0, note_delta, pos, size, NULL, 0, &left_to_mix);
continue;
}
}
{
long size_rendered;
DUMB_CLICK_REMOVER **cr = sigrenderer->click_remover;
dumb_silence(samples_to_filter[0], sigrenderer->n_channels * (size + 1));
sigrenderer->click_remover = NULL;
size_rendered = render_playing(sigrenderer, playing, to_mix[i].volume, note_delta, 0, size, samples_to_filter, 1, &left_to_mix);
sigrenderer->click_remover = cr;
if (sigrenderer->n_channels == 2) {
it_filter(cr ? cr[0] : NULL, &playing->filter_state[0], samples[0], pos, samples_to_filter[0], size_rendered,
2, (int)(65536.0f/delta), playing->true_filter_cutoff, playing->true_filter_resonance);
it_filter(cr ? cr[1] : NULL, &playing->filter_state[1], samples[0]+1, pos, samples_to_filter[0]+1, size_rendered,
2, (int)(65536.0f/delta), playing->true_filter_cutoff, playing->true_filter_resonance);
} else {
it_filter(cr ? cr[0] : NULL, &playing->filter_state[0], samples[0], pos, samples_to_filter[0], size_rendered,
1, (int)(65536.0f/delta), playing->true_filter_cutoff, playing->true_filter_resonance);
}
// FIXME: filtering is not prevented by low left_to_mix!
// FIXME: change 'warning' to 'FIXME' everywhere
}
} else {
it_reset_filter_state(&playing->filter_state[0]);
it_reset_filter_state(&playing->filter_state[1]);
render_playing(sigrenderer, playing, to_mix[i].volume, note_delta, pos, size, samples, 0, &left_to_mix);
}
}
destroy_sample_buffer(samples_to_filter);
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing) {
//if ((sigrenderer->channel[i].playing->flags & (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) == (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) {
// This change was made so Gxx would work correctly when a note faded out or whatever. Let's hope nothing else was broken by it.
if (sigrenderer->channel[i].playing->flags & IT_PLAYING_DEAD) {
free(sigrenderer->channel[i].playing);
sigrenderer->channel[i].playing = NULL;
}
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]) {
if (sigrenderer->playing[i]->flags & IT_PLAYING_DEAD) {
free(sigrenderer->playing[i]);
sigrenderer->playing[i] = NULL;
}
}
}
}
static DUMB_IT_SIGRENDERER *init_sigrenderer(DUMB_IT_SIGDATA *sigdata, int n_channels, int startorder, IT_CALLBACKS *callbacks, DUMB_CLICK_REMOVER **cr)
{
DUMB_IT_SIGRENDERER *sigrenderer;
int i;
if (startorder > sigdata->n_orders) {
free(callbacks);
dumb_destroy_click_remover_array(n_channels, cr);
return NULL;
}
sigrenderer = malloc(sizeof(*sigrenderer));
if (!sigrenderer) {
free(callbacks);
dumb_destroy_click_remover_array(n_channels, cr);
return NULL;
}
sigrenderer->callbacks = callbacks;
sigrenderer->click_remover = cr;
sigrenderer->sigdata = sigdata;
sigrenderer->n_channels = n_channels;
sigrenderer->globalvolume = sigdata->global_volume;
sigrenderer->tempo = sigdata->tempo;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
#if IT_CHANNEL_MUTED != 1
#error this is wrong
#endif
channel->flags = sigdata->channel_pan[i] >> 7;
channel->volume = (sigdata->flags & IT_WAS_AN_XM) ? 0 : 64;
channel->pan = sigdata->channel_pan[i] & 0x7F;
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
channel->channelvolume = sigdata->channel_volume[i];
channel->instrument = 0;
channel->note = 0;
channel->SFmacro = 0;
channel->filter_cutoff = 127;
channel->filter_resonance = 0;
channel->xm_retrig = 0;
channel->retrig_tick = 0;
channel->tremor_time = 0;
channel->midi_state = 0;
channel->lastvolslide = 0;
channel->lastDKL = 0;
channel->lastEF = 0;
channel->lastG = 0;
channel->lastHspeed = 0;
channel->lastHdepth = 0;
channel->lastRspeed = 0;
channel->lastRdepth = 0;
channel->lastI = 0;
channel->lastJ = 0;
channel->lastN = 0;
channel->lastO = 0;
channel->high_offset = 0;
channel->lastP = 0;
channel->lastQ = 0;
channel->lastS = 0;
channel->pat_loop_row = 0;
channel->pat_loop_count = 0;
channel->pat_loop_end_row = 0;
channel->lastW = 0;
channel->xm_lastE1 = 0;
channel->xm_lastE2 = 0;
channel->xm_lastEA = 0;
channel->xm_lastEB = 0;
channel->xm_lastX1 = 0;
channel->xm_lastX2 = 0;
channel->playing = NULL;
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++)
sigrenderer->playing[i] = NULL;
sigrenderer->speed = sigdata->speed;
sigrenderer->processrow = 0xFFFE;
sigrenderer->n_rows = 0;
sigrenderer->breakrow = 0;
sigrenderer->pat_loop_row = -1;
sigrenderer->rowcount = 1;
sigrenderer->order = startorder;
sigrenderer->row = 0;
sigrenderer->processorder = startorder - 1;
sigrenderer->tick = 1;
{
int order;
for (order = 0; order < sigdata->n_orders; order++) {
int n = sigdata->order[order];
if (n < sigdata->n_patterns) goto found_valid_order;
#ifdef INVALID_ORDERS_END_SONG
if (n != IT_ORDER_SKIP)
#else
if (n == IT_ORDER_END)
#endif
break;
}
/* If we get here, there were no valid orders in the song. */
_dumb_it_end_sigrenderer(sigrenderer);
return NULL;
}
found_valid_order:
sigrenderer->time_left = 0;
sigrenderer->sub_time_left = 0;
return sigrenderer;
}
void dumb_it_set_loop_callback(DUMB_IT_SIGRENDERER *sigrenderer, int (*callback)(void *data), void *data)
{
if (sigrenderer) {
sigrenderer->callbacks->loop = callback;
sigrenderer->callbacks->loop_data = data;
}
}
void dumb_it_set_xm_speed_zero_callback(DUMB_IT_SIGRENDERER *sigrenderer, int (*callback)(void *data), void *data)
{
if (sigrenderer) {
sigrenderer->callbacks->xm_speed_zero = callback;
sigrenderer->callbacks->xm_speed_zero_data = data;
}
}
void dumb_it_set_midi_callback(DUMB_IT_SIGRENDERER *sigrenderer, int (*callback)(void *data, int channel, unsigned char midi_byte), void *data)
{
if (sigrenderer) {
sigrenderer->callbacks->midi = callback;
sigrenderer->callbacks->midi_data = data;
}
}
static IT_CALLBACKS *create_callbacks(void)
{
IT_CALLBACKS *callbacks = malloc(sizeof(*callbacks));
if (!callbacks) return NULL;
callbacks->loop = NULL;
callbacks->xm_speed_zero = NULL;
callbacks->midi = NULL;
return callbacks;
}
static DUMB_IT_SIGRENDERER *dumb_it_init_sigrenderer(DUMB_IT_SIGDATA *sigdata, int n_channels, int startorder)
{
IT_CALLBACKS *callbacks;
if (!sigdata) return NULL;
callbacks = create_callbacks();
if (!callbacks) return NULL;
return init_sigrenderer(sigdata, n_channels, startorder, callbacks,
dumb_create_click_remover_array(n_channels));
}
DUH_SIGRENDERER *dumb_it_start_at_order(DUH *duh, int n_channels, int startorder)
{
DUMB_IT_SIGDATA *itsd = duh_get_it_sigdata(duh);
DUMB_IT_SIGRENDERER *itsr = dumb_it_init_sigrenderer(itsd, n_channels, startorder);
return duh_encapsulate_it_sigrenderer(itsr, n_channels, 0);
}
static sigrenderer_t *it_start_sigrenderer(DUH *duh, sigdata_t *vsigdata, int n_channels, long pos)
{
DUMB_IT_SIGDATA *sigdata = vsigdata;
DUMB_IT_SIGRENDERER *sigrenderer;
(void)duh;
{
IT_CALLBACKS *callbacks = create_callbacks();
if (!callbacks) return NULL;
if (sigdata->checkpoint) {
IT_CHECKPOINT *checkpoint = sigdata->checkpoint;
while (checkpoint->next && checkpoint->next->time < pos)
checkpoint = checkpoint->next;
sigrenderer = dup_sigrenderer(checkpoint->sigrenderer, n_channels, callbacks);
if (!sigrenderer) return NULL;
sigrenderer->click_remover = dumb_create_click_remover_array(n_channels);
pos -= checkpoint->time;
} else {
sigrenderer = init_sigrenderer(sigdata, n_channels, 0, callbacks,
dumb_create_click_remover_array(n_channels));
if (!sigrenderer) return NULL;
}
}
while (pos >= sigrenderer->time_left) {
render(sigrenderer, 0, 1.0f, 0, sigrenderer->time_left, NULL);
pos -= sigrenderer->time_left;
sigrenderer->time_left = 0;
if (process_tick(sigrenderer)) {
_dumb_it_end_sigrenderer(sigrenderer);
return NULL;
}
}
render(sigrenderer, 0, 1.0f, 0, pos, NULL);
sigrenderer->time_left -= pos;
return sigrenderer;
}
static long it_sigrenderer_get_samples(
sigrenderer_t *vsigrenderer,
float volume, float delta,
long size, sample_t **samples
)
{
DUMB_IT_SIGRENDERER *sigrenderer = vsigrenderer;
long pos;
int dt;
long todo;
LONG_LONG t;
if (sigrenderer->order < 0) return 0; // problematic
pos = 0;
dt = (int)(delta * 65536.0f + 0.5f);
/* When samples is finally used in render_playing(), it won't be used if
* volume is 0.
*/
if (!samples) volume = 0;
for (;;) {
todo = (long)((((LONG_LONG)sigrenderer->time_left << 16) | sigrenderer->sub_time_left) / dt);
if (todo >= size)
break;
render(sigrenderer, volume, delta, pos, todo, samples);
pos += todo;
size -= todo;
t = sigrenderer->sub_time_left - (LONG_LONG)todo * dt;
sigrenderer->sub_time_left = (long)t & 65535;
sigrenderer->time_left += (long)(t >> 16);
if (process_tick(sigrenderer)) {
sigrenderer->order = -1;
sigrenderer->row = -1;
return pos;
}
}
render(sigrenderer, volume, delta, pos, size, samples);
pos += size;
t = sigrenderer->sub_time_left - (LONG_LONG)size * dt;
sigrenderer->sub_time_left = (long)t & 65535;
sigrenderer->time_left += (long)(t >> 16);
if (samples)
dumb_remove_clicks_array(sigrenderer->n_channels, sigrenderer->click_remover, samples, pos, 512.0f / delta);
return pos;
}
static void it_sigrenderer_get_current_sample(sigrenderer_t *vsigrenderer, float volume, sample_t *samples)
{
DUMB_IT_SIGRENDERER *sigrenderer = vsigrenderer;
(void)volume; // for consideration: in any of these such functions, is 'volume' going to be required?
dumb_click_remover_get_offset_array(sigrenderer->n_channels, sigrenderer->click_remover, samples);
}
void _dumb_it_end_sigrenderer(sigrenderer_t *vsigrenderer)
{
DUMB_IT_SIGRENDERER *sigrenderer = vsigrenderer;
int i;
if (sigrenderer) {
for (i = 0; i < DUMB_IT_N_CHANNELS; i++)
if (sigrenderer->channel[i].playing)
free(sigrenderer->channel[i].playing);
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++)
if (sigrenderer->playing[i])
free(sigrenderer->playing[i]);
dumb_destroy_click_remover_array(sigrenderer->n_channels, sigrenderer->click_remover);
if (sigrenderer->callbacks)
free(sigrenderer->callbacks);
free(vsigrenderer);
}
}
DUH_SIGTYPE_DESC _dumb_sigtype_it = {
SIGTYPE_IT,
NULL,
&it_start_sigrenderer,
NULL,
&it_sigrenderer_get_samples,
&it_sigrenderer_get_current_sample,
&_dumb_it_end_sigrenderer,
&_dumb_it_unload_sigdata
};
DUH_SIGRENDERER *duh_encapsulate_it_sigrenderer(DUMB_IT_SIGRENDERER *it_sigrenderer, int n_channels, long pos)
{
return duh_encapsulate_raw_sigrenderer(it_sigrenderer, &_dumb_sigtype_it, n_channels, pos);
}
DUMB_IT_SIGRENDERER *duh_get_it_sigrenderer(DUH_SIGRENDERER *sigrenderer)
{
return duh_get_raw_sigrenderer(sigrenderer, SIGTYPE_IT);
}
/* Values of 64 or more will access NNA channels here. */
void dumb_it_sr_get_channel_state(DUMB_IT_SIGRENDERER *sr, int channel, DUMB_IT_CHANNEL_STATE *state)
{
IT_PLAYING *playing;
int t; /* temporary var for holding accurate pan and filter cutoff */
float delta;
ASSERT(channel < DUMB_IT_TOTAL_CHANNELS);
if (!sr) { state->sample = 0; return; }
if (channel >= DUMB_IT_N_CHANNELS) {
playing = sr->playing[channel - DUMB_IT_N_CHANNELS];
if (!playing) { state->sample = 0; return; }
} else {
playing = sr->channel[channel].playing;
if (!playing) { state->sample = 0; return; }
}
if (playing->flags & IT_PLAYING_DEAD) { state->sample = 0; return; }
state->channel = playing->channel - sr->channel;
state->sample = playing->sampnum;
state->volume = calculate_volume(sr, playing, 1.0f);
t = apply_pan_envelope(playing);
state->pan = (unsigned char)((t + 128) >> IT_ENVELOPE_SHIFT);
state->subpan = (signed char)t;
delta = playing->delta * 65536.0f;
t = playing->filter_cutoff << IT_ENVELOPE_SHIFT;
apply_pitch_modifications(sr->sigdata, playing, &delta, &t);
state->freq = (int)delta;
if (t == 127 << IT_ENVELOPE_SHIFT && playing->filter_resonance == 0) {
state->filter_resonance = playing->true_filter_resonance;
t = playing->true_filter_cutoff;
} else
state->filter_resonance = playing->filter_resonance;
state->filter_cutoff = (unsigned char)(t >> 8);
state->filter_subcutoff = (unsigned char)t;
}
int dumb_it_callback_terminate(void *data)
{
(void)data;
return 1;
}
int dumb_it_callback_midi_block(void *data, int channel, unsigned char midi_byte)
{
(void)data;
(void)channel;
(void)midi_byte;
return 1;
}
#define IT_CHECKPOINT_INTERVAL (30 * 65536) /* Half a minute */
/* Returns the length of the module, up until it first loops. */
long dumb_it_build_checkpoints(DUMB_IT_SIGDATA *sigdata)
{
IT_CHECKPOINT *checkpoint;
if (!sigdata) return 0;
checkpoint = sigdata->checkpoint;
while (checkpoint) {
IT_CHECKPOINT *next = checkpoint->next;
_dumb_it_end_sigrenderer(checkpoint->sigrenderer);
free(checkpoint);
checkpoint = next;
}
sigdata->checkpoint = NULL;
checkpoint = malloc(sizeof(*checkpoint));
if (!checkpoint) return 0;
checkpoint->time = 0;
checkpoint->sigrenderer = dumb_it_init_sigrenderer(sigdata, 0, 0);
if (!checkpoint->sigrenderer) {
free(checkpoint);
return 0;
}
checkpoint->sigrenderer->callbacks->loop = &dumb_it_callback_terminate;
checkpoint->sigrenderer->callbacks->xm_speed_zero = &dumb_it_callback_terminate;
sigdata->checkpoint = checkpoint;
for (;;) {
long l;
DUMB_IT_SIGRENDERER *sigrenderer = dup_sigrenderer(checkpoint->sigrenderer, 0, checkpoint->sigrenderer->callbacks);
checkpoint->sigrenderer->callbacks = NULL;
if (!sigrenderer) {
checkpoint->next = NULL;
return checkpoint->time;
}
l = it_sigrenderer_get_samples(sigrenderer, 0, 1.0f, IT_CHECKPOINT_INTERVAL, NULL);
if (l < IT_CHECKPOINT_INTERVAL) {
_dumb_it_end_sigrenderer(sigrenderer);
checkpoint->next = NULL;
return checkpoint->time + l;
}
checkpoint->next = malloc(sizeof(*checkpoint->next));
if (!checkpoint->next) {
_dumb_it_end_sigrenderer(sigrenderer);
return checkpoint->time + IT_CHECKPOINT_INTERVAL;
}
checkpoint->next->time = checkpoint->time + IT_CHECKPOINT_INTERVAL;
checkpoint = checkpoint->next;
checkpoint->sigrenderer = sigrenderer;
}
}
void dumb_it_do_initial_runthrough(DUH *duh)
{
if (duh) {
DUMB_IT_SIGDATA *sigdata = duh_get_it_sigdata(duh);
if (sigdata)
duh_set_length(duh, dumb_it_build_checkpoints(sigdata));
}
}
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