mirror of
https://github.com/libretro/RetroArch.git
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1943 lines
64 KiB
C
1943 lines
64 KiB
C
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#include "stdlib.h"
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#include "string.h"
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#include "ibxm.h"
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const char *IBXM_VERSION = "ibxm/ac mod/xm/s3m replay 20191214 (c)mumart@gmail.com";
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static const int FP_SHIFT = 15, FP_ONE = 32768, FP_MASK = 32767;
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static const int exp2_table[] = {
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32768, 32946, 33125, 33305, 33486, 33667, 33850, 34034,
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34219, 34405, 34591, 34779, 34968, 35158, 35349, 35541,
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35734, 35928, 36123, 36319, 36516, 36715, 36914, 37114,
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37316, 37518, 37722, 37927, 38133, 38340, 38548, 38757,
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38968, 39180, 39392, 39606, 39821, 40037, 40255, 40473,
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40693, 40914, 41136, 41360, 41584, 41810, 42037, 42265,
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42495, 42726, 42958, 43191, 43425, 43661, 43898, 44137,
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44376, 44617, 44859, 45103, 45348, 45594, 45842, 46091,
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46341, 46593, 46846, 47100, 47356, 47613, 47871, 48131,
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48393, 48655, 48920, 49185, 49452, 49721, 49991, 50262,
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50535, 50810, 51085, 51363, 51642, 51922, 52204, 52488,
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52773, 53059, 53347, 53637, 53928, 54221, 54515, 54811,
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55109, 55408, 55709, 56012, 56316, 56622, 56929, 57238,
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57549, 57861, 58176, 58491, 58809, 59128, 59449, 59772,
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60097, 60423, 60751, 61081, 61413, 61746, 62081, 62419,
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62757, 63098, 63441, 63785, 64132, 64480, 64830, 65182,
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65536
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};
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static const short sine_table[] = {
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0, 24, 49, 74, 97, 120, 141, 161, 180, 197, 212, 224, 235, 244, 250, 253,
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255, 253, 250, 244, 235, 224, 212, 197, 180, 161, 141, 120, 97, 74, 49, 24
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};
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struct note {
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unsigned char key, instrument, volume, effect, param;
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};
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struct channel {
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struct replay *replay;
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struct instrument *instrument;
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struct sample *sample;
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struct note note;
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int id, key_on, random_seed, pl_row;
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int sample_off, sample_idx, sample_fra, freq, ampl, pann;
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int volume, panning, fadeout_vol, vol_env_tick, pan_env_tick;
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int period, porta_period, retrig_count, fx_count, av_count;
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int porta_up_param, porta_down_param, tone_porta_param, offset_param;
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int fine_porta_up_param, fine_porta_down_param, xfine_porta_param;
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int arpeggio_param, vol_slide_param, gvol_slide_param, pan_slide_param;
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int fine_vslide_up_param, fine_vslide_down_param;
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int retrig_volume, retrig_ticks, tremor_on_ticks, tremor_off_ticks;
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int vibrato_type, vibrato_phase, vibrato_speed, vibrato_depth;
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int tremolo_type, tremolo_phase, tremolo_speed, tremolo_depth;
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int tremolo_add, vibrato_add, arpeggio_add;
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};
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struct replay {
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int sample_rate, interpolation, global_vol;
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int seq_pos, break_pos, row, next_row, tick;
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int speed, tempo, pl_count, pl_chan;
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int *ramp_buf;
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char **play_count;
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struct channel *channels;
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struct module *module;
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};
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static int exp_2( int x ) {
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int c, m, y;
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int x0 = ( x & FP_MASK ) >> ( FP_SHIFT - 7 );
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c = exp2_table[ x0 ];
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m = exp2_table[ x0 + 1 ] - c;
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y = ( m * ( x & ( FP_MASK >> 7 ) ) >> 8 ) + c;
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return ( y << FP_SHIFT ) >> ( FP_SHIFT - ( x >> FP_SHIFT ) );
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}
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static int log_2( int x ) {
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int step;
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int y = 16 << FP_SHIFT;
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for( step = y; step > 0; step >>= 1 ) {
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if( exp_2( y - step ) >= x ) {
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y -= step;
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}
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}
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return y;
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}
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static char* data_ascii( struct data *data, int offset, int length, char *dest ) {
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int idx, chr;
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memset( dest, 32, length );
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if( offset > data->length ) {
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offset = data->length;
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}
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if( ( unsigned int ) offset + length > ( unsigned int ) data->length ) {
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length = data->length - offset;
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}
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for( idx = 0; idx < length; idx++ ) {
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chr = data->buffer[ offset + idx ] & 0xFF;
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if( chr > 32 ) {
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dest[ idx ] = chr;
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}
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}
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return dest;
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}
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static int data_s8( struct data *data, int offset ) {
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int value = 0;
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if( offset < data->length ) {
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value = data->buffer[ offset ];
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value = ( value & 0x7F ) - ( value & 0x80 );
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}
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return value;
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}
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static int data_u8( struct data *data, int offset ) {
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int value = 0;
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if( offset < data->length ) {
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value = data->buffer[ offset ] & 0xFF;
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}
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return value;
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}
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static int data_u16be( struct data *data, int offset ) {
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int value = 0;
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if( offset + 1 < data->length ) {
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value = ( ( data->buffer[ offset ] & 0xFF ) << 8 )
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| ( data->buffer[ offset + 1 ] & 0xFF );
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}
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return value;
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}
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static int data_u16le( struct data *data, int offset ) {
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int value = 0;
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if( offset + 1 < data->length ) {
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value = ( data->buffer[ offset ] & 0xFF )
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| ( ( data->buffer[ offset + 1 ] & 0xFF ) << 8 );
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}
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return value;
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}
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static unsigned int data_u32le( struct data *data, int offset ) {
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unsigned int value = 0;
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if( offset + 3 < data->length ) {
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value = ( data->buffer[ offset ] & 0xFF )
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| ( ( data->buffer[ offset + 1 ] & 0xFF ) << 8 )
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| ( ( data->buffer[ offset + 2 ] & 0xFF ) << 16 )
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| ( ( data->buffer[ offset + 3 ] & 0xFF ) << 24 );
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}
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return value;
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}
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static void data_sam_s8( struct data *data, int offset, int count, short *dest ) {
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int idx, amp, length = data->length;
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char *buffer = data->buffer;
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if( offset > length ) {
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offset = length;
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}
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if( offset + count > length ) {
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count = length - offset;
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}
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for( idx = 0; idx < count; idx++ ) {
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amp = ( buffer[ offset + idx ] & 0xFF ) << 8;
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dest[ idx ] = ( amp & 0x7FFF ) - ( amp & 0x8000 );
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}
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}
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static void data_sam_s16le( struct data *data, int offset, int count, short *dest ) {
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int idx, amp, length = data->length;
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char *buffer = data->buffer;
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if( offset > length ) {
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offset = length;
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}
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if( offset + count * 2 > length ) {
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count = ( length - offset ) / 2;
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}
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for( idx = 0; idx < count; idx++ ) {
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amp = ( buffer[ offset + idx * 2 ] & 0xFF ) | ( buffer[ offset + idx * 2 + 1 ] << 8 );
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dest[ idx ] = ( amp & 0x7FFF ) - ( amp & 0x8000 );
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}
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}
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static int envelope_next_tick( struct envelope *envelope, int tick, int key_on ) {
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tick++;
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if( envelope->looped && tick >= envelope->loop_end_tick ) {
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tick = envelope->loop_start_tick;
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}
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if( envelope->sustain && key_on && tick >= envelope->sustain_tick ) {
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tick = envelope->sustain_tick;
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}
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return tick;
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}
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static int envelope_calculate_ampl( struct envelope *envelope, int tick ) {
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int idx, point, dt, da;
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int ampl = envelope->points_ampl[ envelope->num_points - 1 ];
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if( tick < envelope->points_tick[ envelope->num_points - 1 ] ) {
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point = 0;
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for( idx = 1; idx < envelope->num_points; idx++ ) {
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if( envelope->points_tick[ idx ] <= tick ) {
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point = idx;
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}
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}
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dt = envelope->points_tick[ point + 1 ] - envelope->points_tick[ point ];
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da = envelope->points_ampl[ point + 1 ] - envelope->points_ampl[ point ];
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ampl = envelope->points_ampl[ point ];
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ampl += ( ( da << 24 ) / dt ) * ( tick - envelope->points_tick[ point ] ) >> 24;
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}
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return ampl;
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}
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static void sample_ping_pong( struct sample *sample ) {
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int idx;
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int loop_start = sample->loop_start;
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int loop_length = sample->loop_length;
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int loop_end = loop_start + loop_length;
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short *sample_data = sample->data;
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short *new_data = (short*)calloc( loop_end + loop_length + 1, sizeof( short ) );
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if( new_data ) {
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memcpy( new_data, sample_data, loop_end * sizeof( short ) );
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for( idx = 0; idx < loop_length; idx++ ) {
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new_data[ loop_end + idx ] = sample_data[ loop_end - idx - 1 ];
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}
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free( sample->data );
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sample->data = new_data;
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sample->loop_length *= 2;
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sample->data[ loop_start + sample->loop_length ] = sample->data[ loop_start ];
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}
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}
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/* Deallocate the specified module. */
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void dispose_module( struct module *module ) {
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int idx, sam;
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struct instrument *instrument;
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free( module->default_panning );
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free( module->sequence );
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if( module->patterns ) {
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for( idx = 0; idx < module->num_patterns; idx++ ) {
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free( module->patterns[ idx ].data );
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}
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free( module->patterns );
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}
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if( module->instruments ) {
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for( idx = 0; idx <= module->num_instruments; idx++ ) {
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instrument = &module->instruments[ idx ];
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if( instrument->samples ) {
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for( sam = 0; sam < instrument->num_samples; sam++ ) {
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free( instrument->samples[ sam ].data );
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}
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free( instrument->samples );
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}
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}
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free( module->instruments );
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}
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free( module );
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}
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static struct module* module_load_xm( struct data *data, char *message ) {
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int delta_env, offset, next_offset, idx, entry;
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int num_rows, num_notes, pat_data_len, pat_data_offset;
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int sam, sam_head_offset, sam_data_bytes, sam_data_samples;
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int num_samples, sam_loop_start, sam_loop_length, amp;
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int note, flags, key, ins, vol, fxc, fxp;
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int point, point_tick, point_offset;
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int looped, ping_pong, sixteen_bit;
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char ascii[ 16 ], *pattern_data;
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struct instrument *instrument;
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struct sample *sample;
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struct module *module = (struct module*)calloc( 1, sizeof( struct module ) );
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if( module ) {
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if( data_u16le( data, 58 ) != 0x0104 ) {
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strcpy( message, "XM format version must be 0x0104!" );
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dispose_module( module );
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return NULL;
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}
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data_ascii( data, 17, 20, module->name );
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delta_env = !memcmp( data_ascii( data, 38, 15, ascii ), "DigiBooster Pro", 15 );
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offset = 60 + data_u32le( data, 60 );
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module->sequence_len = data_u16le( data, 64 );
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module->restart_pos = data_u16le( data, 66 );
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module->num_channels = data_u16le( data, 68 );
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module->num_patterns = data_u16le( data, 70 );
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module->num_instruments = data_u16le( data, 72 );
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module->linear_periods = data_u16le( data, 74 ) & 0x1;
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module->default_gvol = 64;
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module->default_speed = data_u16le( data, 76 );
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module->default_tempo = data_u16le( data, 78 );
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module->c2_rate = 8363;
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module->gain = 64;
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module->default_panning = (unsigned char*)calloc( module->num_channels, sizeof( unsigned char ) );
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if( !module->default_panning ) {
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dispose_module( module );
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return NULL;
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}
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for( idx = 0; idx < module->num_channels; idx++ ) {
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module->default_panning[ idx ] = 128;
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}
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module->sequence = (unsigned char*)calloc( module->sequence_len, sizeof( unsigned char ) );
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if( !module->sequence ) {
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dispose_module( module );
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return NULL;
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}
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for( idx = 0; idx < module->sequence_len; idx++ ) {
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entry = data_u8( data, 80 + idx );
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module->sequence[ idx ] = entry < module->num_patterns ? entry : 0;
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}
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module->patterns = (struct pattern*)calloc( module->num_patterns, sizeof( struct pattern ) );
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if( !module->patterns ) {
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dispose_module( module );
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return NULL;
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}
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for( idx = 0; idx < module->num_patterns; idx++ ) {
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if( data_u8( data, offset + 4 ) ) {
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strcpy( message, "Unknown pattern packing type!" );
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dispose_module( module );
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return NULL;
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}
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num_rows = data_u16le( data, offset + 5 );
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if( num_rows < 1 ) {
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num_rows = 1;
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}
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pat_data_len = data_u16le( data, offset + 7 );
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offset += data_u32le( data, offset );
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next_offset = offset + pat_data_len;
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num_notes = num_rows * module->num_channels;
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pattern_data = (char*)calloc( num_notes, 5 );
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if( !pattern_data ) {
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dispose_module( module );
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return NULL;
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}
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module->patterns[ idx ].num_channels = module->num_channels;
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module->patterns[ idx ].num_rows = num_rows;
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module->patterns[ idx ].data = pattern_data;
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if( pat_data_len > 0 ) {
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pat_data_offset = 0;
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for( note = 0; note < num_notes; note++ ) {
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flags = data_u8( data, offset );
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if( ( flags & 0x80 ) == 0 ) {
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flags = 0x1F;
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} else {
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offset++;
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}
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key = ( flags & 0x01 ) > 0 ? data_u8( data, offset++ ) : 0;
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pattern_data[ pat_data_offset++ ] = key;
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ins = ( flags & 0x02 ) > 0 ? data_u8( data, offset++ ) : 0;
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pattern_data[ pat_data_offset++ ] = ins;
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vol = ( flags & 0x04 ) > 0 ? data_u8( data, offset++ ) : 0;
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pattern_data[ pat_data_offset++ ] = vol;
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fxc = ( flags & 0x08 ) > 0 ? data_u8( data, offset++ ) : 0;
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fxp = ( flags & 0x10 ) > 0 ? data_u8( data, offset++ ) : 0;
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if( fxc >= 0x40 ) {
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fxc = fxp = 0;
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}
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pattern_data[ pat_data_offset++ ] = fxc;
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pattern_data[ pat_data_offset++ ] = fxp;
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}
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}
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offset = next_offset;
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}
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module->instruments = (struct instrument*)calloc( module->num_instruments + 1, sizeof( struct instrument ) );
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if( !module->instruments ) {
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dispose_module( module );
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return NULL;
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}
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instrument = &module->instruments[ 0 ];
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instrument->samples = (struct sample*)calloc( 1, sizeof( struct sample ) );
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if( !instrument->samples ) {
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dispose_module( module );
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return NULL;
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}
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for( ins = 1; ins <= module->num_instruments; ins++ ) {
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instrument = &module->instruments[ ins ];
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data_ascii( data, offset + 4, 22, instrument->name );
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num_samples = data_u16le( data, offset + 27 );
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instrument->num_samples = ( num_samples > 0 ) ? num_samples : 1;
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instrument->samples = (struct sample*)calloc( instrument->num_samples, sizeof( struct sample ) );
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if( !instrument->samples ) {
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dispose_module( module );
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return NULL;
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}
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if( num_samples > 0 ) {
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for( key = 0; key < 96; key++ ) {
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instrument->key_to_sample[ key + 1 ] = data_u8( data, offset + 33 + key );
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}
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point_tick = 0;
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for( point = 0; point < 12; point++ ) {
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point_offset = offset + 129 + ( point * 4 );
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point_tick = ( delta_env ? point_tick : 0 ) + data_u16le( data, point_offset );
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instrument->vol_env.points_tick[ point ] = point_tick;
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instrument->vol_env.points_ampl[ point ] = data_u16le( data, point_offset + 2 );
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}
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point_tick = 0;
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for( point = 0; point < 12; point++ ) {
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point_offset = offset + 177 + ( point * 4 );
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point_tick = ( delta_env ? point_tick : 0 ) + data_u16le( data, point_offset );
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instrument->pan_env.points_tick[ point ] = point_tick;
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instrument->pan_env.points_ampl[ point ] = data_u16le( data, point_offset + 2 );
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}
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instrument->vol_env.num_points = data_u8( data, offset + 225 );
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if( instrument->vol_env.num_points > 12 ) {
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instrument->vol_env.num_points = 0;
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}
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instrument->pan_env.num_points = data_u8( data, offset + 226 );
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if( instrument->pan_env.num_points > 12 ) {
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instrument->pan_env.num_points = 0;
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}
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instrument->vol_env.sustain_tick = instrument->vol_env.points_tick[ data_u8( data, offset + 227 ) & 0xF ];
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instrument->vol_env.loop_start_tick = instrument->vol_env.points_tick[ data_u8( data, offset + 228 ) & 0xF ];
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instrument->vol_env.loop_end_tick = instrument->vol_env.points_tick[ data_u8( data, offset + 229 ) & 0xF ];
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instrument->pan_env.sustain_tick = instrument->pan_env.points_tick[ data_u8( data, offset + 230 ) & 0xF ];
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instrument->pan_env.loop_start_tick = instrument->pan_env.points_tick[ data_u8( data, offset + 231 ) & 0xF ];
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instrument->pan_env.loop_end_tick = instrument->pan_env.points_tick[ data_u8( data, offset + 232 ) & 0xF ];
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instrument->vol_env.enabled = instrument->vol_env.num_points > 0 && ( data_u8( data, offset + 233 ) & 0x1 );
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instrument->vol_env.sustain = ( data_u8( data, offset + 233 ) & 0x2 ) > 0;
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instrument->vol_env.looped = ( data_u8( data, offset + 233 ) & 0x4 ) > 0;
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instrument->pan_env.enabled = instrument->pan_env.num_points > 0 && ( data_u8( data, offset + 234 ) & 0x1 );
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instrument->pan_env.sustain = ( data_u8( data, offset + 234 ) & 0x2 ) > 0;
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instrument->pan_env.looped = ( data_u8( data, offset + 234 ) & 0x4 ) > 0;
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instrument->vib_type = data_u8( data, offset + 235 );
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instrument->vib_sweep = data_u8( data, offset + 236 );
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instrument->vib_depth = data_u8( data, offset + 237 );
|
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instrument->vib_rate = data_u8( data, offset + 238 );
|
|
instrument->vol_fadeout = data_u16le( data, offset + 239 );
|
|
}
|
|
offset += data_u32le( data, offset );
|
|
sam_head_offset = offset;
|
|
offset += num_samples * 40;
|
|
for( sam = 0; sam < num_samples; sam++ ) {
|
|
sample = &instrument->samples[ sam ];
|
|
sam_data_bytes = data_u32le( data, sam_head_offset );
|
|
sam_loop_start = data_u32le( data, sam_head_offset + 4 );
|
|
sam_loop_length = data_u32le( data, sam_head_offset + 8 );
|
|
sample->volume = data_u8( data, sam_head_offset + 12 );
|
|
sample->fine_tune = data_s8( data, sam_head_offset + 13 );
|
|
looped = ( data_u8( data, sam_head_offset + 14 ) & 0x3 ) > 0;
|
|
ping_pong = ( data_u8( data, sam_head_offset + 14 ) & 0x2 ) > 0;
|
|
sixteen_bit = ( data_u8( data, sam_head_offset + 14 ) & 0x10 ) > 0;
|
|
sample->panning = data_u8( data, sam_head_offset + 15 ) + 1;
|
|
sample->rel_note = data_s8( data, sam_head_offset + 16 );
|
|
data_ascii( data, sam_head_offset + 18, 22, sample->name );
|
|
sam_head_offset += 40;
|
|
sam_data_samples = sam_data_bytes;
|
|
if( sixteen_bit ) {
|
|
sam_data_samples = sam_data_samples >> 1;
|
|
sam_loop_start = sam_loop_start >> 1;
|
|
sam_loop_length = sam_loop_length >> 1;
|
|
}
|
|
if( !looped || ( sam_loop_start + sam_loop_length ) > sam_data_samples ) {
|
|
sam_loop_start = sam_data_samples;
|
|
sam_loop_length = 0;
|
|
}
|
|
sample->loop_start = sam_loop_start;
|
|
sample->loop_length = sam_loop_length;
|
|
sample->data = (short*)calloc( sam_data_samples + 1, sizeof( short ) );
|
|
if( sample->data ) {
|
|
if( sixteen_bit ) {
|
|
data_sam_s16le( data, offset, sam_data_samples, sample->data );
|
|
} else {
|
|
data_sam_s8( data, offset, sam_data_samples, sample->data );
|
|
}
|
|
amp = 0;
|
|
for( idx = 0; idx < sam_data_samples; idx++ ) {
|
|
amp = amp + sample->data[ idx ];
|
|
amp = ( amp & 0x7FFF ) - ( amp & 0x8000 );
|
|
sample->data[ idx ] = amp;
|
|
}
|
|
sample->data[ sam_loop_start + sam_loop_length ] = sample->data[ sam_loop_start ];
|
|
if( ping_pong ) {
|
|
sample_ping_pong( sample );
|
|
}
|
|
} else {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
offset += sam_data_bytes;
|
|
}
|
|
}
|
|
}
|
|
return module;
|
|
}
|
|
|
|
static struct module* module_load_s3m( struct data *data, char *message ) {
|
|
int idx, module_data_idx, inst_offset, flags;
|
|
int version, sixteen_bit, tune, signed_samples;
|
|
int stereo_mode, default_pan, channel_map[ 32 ];
|
|
int sample_offset, sample_length, loop_start, loop_length;
|
|
int pat_offset, note_offset, row, chan, token;
|
|
int key, ins, volume, effect, param, panning;
|
|
char *pattern_data;
|
|
struct instrument *instrument;
|
|
struct sample *sample;
|
|
struct module *module = (struct module*)calloc( 1, sizeof( struct module ) );
|
|
if( module ) {
|
|
data_ascii( data, 0, 28, module->name );
|
|
module->sequence_len = data_u16le( data, 32 );
|
|
module->num_instruments = data_u16le( data, 34 );
|
|
module->num_patterns = data_u16le( data, 36 );
|
|
flags = data_u16le( data, 38 );
|
|
version = data_u16le( data, 40 );
|
|
module->fast_vol_slides = ( ( flags & 0x40 ) == 0x40 ) || version == 0x1300;
|
|
signed_samples = data_u16le( data, 42 ) == 1;
|
|
if( data_u32le( data, 44 ) != 0x4d524353 ) {
|
|
strcpy( message, "Not an S3M file!" );
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
module->default_gvol = data_u8( data, 48 );
|
|
module->default_speed = data_u8( data, 49 );
|
|
module->default_tempo = data_u8( data, 50 );
|
|
module->c2_rate = 8363;
|
|
module->gain = data_u8( data, 51 ) & 0x7F;
|
|
stereo_mode = ( data_u8( data, 51 ) & 0x80 ) == 0x80;
|
|
default_pan = data_u8( data, 53 ) == 0xFC;
|
|
for( idx = 0; idx < 32; idx++ ) {
|
|
channel_map[ idx ] = -1;
|
|
if( data_u8( data, 64 + idx ) < 16 ) {
|
|
channel_map[ idx ] = module->num_channels++;
|
|
}
|
|
}
|
|
module->sequence = (unsigned char*)calloc( module->sequence_len, sizeof( unsigned char ) );
|
|
if( !module->sequence ){
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
for( idx = 0; idx < module->sequence_len; idx++ ) {
|
|
module->sequence[ idx ] = data_u8( data, 96 + idx );
|
|
}
|
|
module_data_idx = 96 + module->sequence_len;
|
|
module->instruments = (struct instrument*)calloc( module->num_instruments + 1, sizeof( struct instrument ) );
|
|
if( !module->instruments ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
instrument = &module->instruments[ 0 ];
|
|
instrument->num_samples = 1;
|
|
instrument->samples = (struct sample*)calloc( 1, sizeof( struct sample ) );
|
|
if( !instrument->samples ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
for( ins = 1; ins <= module->num_instruments; ins++ ) {
|
|
instrument = &module->instruments[ ins ];
|
|
instrument->num_samples = 1;
|
|
instrument->samples = (struct sample*)calloc( 1, sizeof( struct sample ) );
|
|
if( !instrument->samples ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
sample = &instrument->samples[ 0 ];
|
|
inst_offset = data_u16le( data, module_data_idx ) << 4;
|
|
module_data_idx += 2;
|
|
data_ascii( data, inst_offset + 48, 28, instrument->name );
|
|
if( data_u8( data, inst_offset ) == 1 && data_u16le( data, inst_offset + 76 ) == 0x4353 ) {
|
|
sample_offset = ( data_u8( data, inst_offset + 13 ) << 20 )
|
|
+ ( data_u16le( data, inst_offset + 14 ) << 4 );
|
|
sample_length = data_u32le( data, inst_offset + 16 );
|
|
loop_start = data_u32le( data, inst_offset + 20 );
|
|
loop_length = data_u32le( data, inst_offset + 24 ) - loop_start;
|
|
sample->volume = data_u8( data, inst_offset + 28 );
|
|
if( data_u8( data, inst_offset + 30 ) != 0 ) {
|
|
strcpy( message, "Packed samples not supported!" );
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
if( loop_start + loop_length > sample_length ) {
|
|
loop_length = sample_length - loop_start;
|
|
}
|
|
if( loop_length < 1 || !( data_u8( data, inst_offset + 31 ) & 0x1 ) ) {
|
|
loop_start = sample_length;
|
|
loop_length = 0;
|
|
}
|
|
sample->loop_start = loop_start;
|
|
sample->loop_length = loop_length;
|
|
/* stereo = data_u8( data, inst_offset + 31 ) & 0x2; */
|
|
sixteen_bit = data_u8( data, inst_offset + 31 ) & 0x4;
|
|
tune = ( log_2( data_u32le( data, inst_offset + 32 ) ) - log_2( module->c2_rate ) ) * 12;
|
|
sample->rel_note = tune >> FP_SHIFT;
|
|
sample->fine_tune = ( tune & FP_MASK ) >> ( FP_SHIFT - 7 );
|
|
sample->data = (short*)calloc( sample_length + 1, sizeof( short ) );
|
|
if( sample->data ) {
|
|
if( sixteen_bit ) {
|
|
data_sam_s16le( data, sample_offset, sample_length, sample->data );
|
|
} else {
|
|
data_sam_s8( data, sample_offset, sample_length, sample->data );
|
|
}
|
|
if( !signed_samples ) {
|
|
for( idx = 0; idx < sample_length; idx++ ) {
|
|
sample->data[ idx ] = ( sample->data[ idx ] & 0xFFFF ) - 32768;
|
|
}
|
|
}
|
|
sample->data[ loop_start + loop_length ] = sample->data[ loop_start ];
|
|
} else {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
module->patterns = (struct pattern*)calloc( module->num_patterns, sizeof( struct pattern ) );
|
|
if( !module->patterns ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
for( idx = 0; idx < module->num_patterns; idx++ ) {
|
|
module->patterns[ idx ].num_channels = module->num_channels;
|
|
module->patterns[ idx ].num_rows = 64;
|
|
pattern_data = (char*)calloc( module->num_channels * 64, 5 );
|
|
if( !pattern_data ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
module->patterns[ idx ].data = pattern_data;
|
|
pat_offset = ( data_u16le( data, module_data_idx ) << 4 ) + 2;
|
|
row = 0;
|
|
while( row < 64 ) {
|
|
token = data_u8( data, pat_offset++ );
|
|
if( token ) {
|
|
key = ins = 0;
|
|
if( ( token & 0x20 ) == 0x20 ) {
|
|
/* Key + Instrument.*/
|
|
key = data_u8( data, pat_offset++ );
|
|
ins = data_u8( data, pat_offset++ );
|
|
if( key < 0xFE ) {
|
|
key = ( key >> 4 ) * 12 + ( key & 0xF ) + 1;
|
|
} else if( key == 0xFF ) {
|
|
key = 0;
|
|
}
|
|
}
|
|
volume = 0;
|
|
if( ( token & 0x40 ) == 0x40 ) {
|
|
/* Volume Column.*/
|
|
volume = ( data_u8( data, pat_offset++ ) & 0x7F ) + 0x10;
|
|
if( volume > 0x50 ) {
|
|
volume = 0;
|
|
}
|
|
}
|
|
effect = param = 0;
|
|
if( ( token & 0x80 ) == 0x80 ) {
|
|
/* Effect + Param.*/
|
|
effect = data_u8( data, pat_offset++ );
|
|
param = data_u8( data, pat_offset++ );
|
|
if( effect < 1 || effect >= 0x40 ) {
|
|
effect = param = 0;
|
|
} else if( effect > 0 ) {
|
|
effect += 0x80;
|
|
}
|
|
}
|
|
chan = channel_map[ token & 0x1F ];
|
|
if( chan >= 0 ) {
|
|
note_offset = ( row * module->num_channels + chan ) * 5;
|
|
pattern_data[ note_offset ] = key;
|
|
pattern_data[ note_offset + 1 ] = ins;
|
|
pattern_data[ note_offset + 2 ] = volume;
|
|
pattern_data[ note_offset + 3 ] = effect;
|
|
pattern_data[ note_offset + 4 ] = param;
|
|
}
|
|
} else {
|
|
row++;
|
|
}
|
|
}
|
|
module_data_idx += 2;
|
|
}
|
|
module->default_panning = (unsigned char*)calloc( module->num_channels, sizeof( unsigned char ) );
|
|
if( module->default_panning ) {
|
|
for( chan = 0; chan < 32; chan++ ) {
|
|
if( channel_map[ chan ] >= 0 ) {
|
|
panning = 7;
|
|
if( stereo_mode ) {
|
|
panning = 12;
|
|
if( data_u8( data, 64 + chan ) < 8 ) {
|
|
panning = 3;
|
|
}
|
|
}
|
|
if( default_pan ) {
|
|
flags = data_u8( data, module_data_idx + chan );
|
|
if( ( flags & 0x20 ) == 0x20 ) {
|
|
panning = flags & 0xF;
|
|
}
|
|
}
|
|
module->default_panning[ channel_map[ chan ] ] = panning * 17;
|
|
}
|
|
}
|
|
} else {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
}
|
|
return module;
|
|
}
|
|
|
|
static struct module* module_load_mod( struct data *data, char *message ) {
|
|
int idx, pat, module_data_idx, pat_data_len, pat_data_idx;
|
|
int period, key, ins, effect, param, fine_tune;
|
|
int sample_length, loop_start, loop_length;
|
|
char *pattern_data;
|
|
struct instrument *instrument;
|
|
struct sample *sample;
|
|
struct module *module = (struct module*)calloc( 1, sizeof( struct module ) );
|
|
if( module ) {
|
|
data_ascii( data, 0, 20, module->name );
|
|
module->sequence_len = data_u8( data, 950 ) & 0x7F;
|
|
module->restart_pos = data_u8( data, 951 ) & 0x7F;
|
|
if( module->restart_pos >= module->sequence_len ) {
|
|
module->restart_pos = 0;
|
|
}
|
|
module->sequence = (unsigned char*)calloc( 128, sizeof( unsigned char ) );
|
|
if( !module->sequence ){
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
for( idx = 0; idx < 128; idx++ ) {
|
|
pat = data_u8( data, 952 + idx ) & 0x7F;
|
|
module->sequence[ idx ] = pat;
|
|
if( pat >= module->num_patterns ) {
|
|
module->num_patterns = pat + 1;
|
|
}
|
|
}
|
|
switch( data_u16be( data, 1082 ) ) {
|
|
case 0x4b2e: /* M.K. */
|
|
case 0x4b21: /* M!K! */
|
|
case 0x5434: /* FLT4 */
|
|
module->num_channels = 4;
|
|
module->c2_rate = 8287;
|
|
module->gain = 64;
|
|
break;
|
|
case 0x484e: /* xCHN */
|
|
module->num_channels = data_u8( data, 1080 ) - 48;
|
|
module->c2_rate = 8363;
|
|
module->gain = 32;
|
|
break;
|
|
case 0x4348: /* xxCH */
|
|
module->num_channels = ( data_u8( data, 1080 ) - 48 ) * 10;
|
|
module->num_channels += data_u8( data, 1081 ) - 48;
|
|
module->c2_rate = 8363;
|
|
module->gain = 32;
|
|
break;
|
|
default:
|
|
strcpy( message, "MOD Format not recognised!" );
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
module->default_gvol = 64;
|
|
module->default_speed = 6;
|
|
module->default_tempo = 125;
|
|
module->default_panning = (unsigned char*)calloc( module->num_channels, sizeof( unsigned char ) );
|
|
if( !module->default_panning ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
for( idx = 0; idx < module->num_channels; idx++ ) {
|
|
module->default_panning[ idx ] = 51;
|
|
if( ( idx & 3 ) == 1 || ( idx & 3 ) == 2 ) {
|
|
module->default_panning[ idx ] = 204;
|
|
}
|
|
}
|
|
module_data_idx = 1084;
|
|
module->patterns = (struct pattern*)calloc( module->num_patterns, sizeof( struct pattern ) );
|
|
if( !module->patterns ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
pat_data_len = module->num_channels * 64 * 5;
|
|
for( pat = 0; pat < module->num_patterns; pat++ ) {
|
|
module->patterns[ pat ].num_channels = module->num_channels;
|
|
module->patterns[ pat ].num_rows = 64;
|
|
pattern_data = (char*)calloc( 1, pat_data_len );
|
|
if( !pattern_data ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
module->patterns[ pat ].data = pattern_data;
|
|
for( pat_data_idx = 0; pat_data_idx < pat_data_len; pat_data_idx += 5 ) {
|
|
period = ( data_u8( data, module_data_idx ) & 0xF ) << 8;
|
|
period = ( period | data_u8( data, module_data_idx + 1 ) ) * 4;
|
|
if( period >= 112 && period <= 6848 ) {
|
|
key = -12 * log_2( ( period << FP_SHIFT ) / 29021 );
|
|
key = ( key + ( key & ( FP_ONE >> 1 ) ) ) >> FP_SHIFT;
|
|
pattern_data[ pat_data_idx ] = key;
|
|
}
|
|
ins = ( data_u8( data, module_data_idx + 2 ) & 0xF0 ) >> 4;
|
|
ins = ins | ( data_u8( data, module_data_idx ) & 0x10 );
|
|
pattern_data[ pat_data_idx + 1 ] = ins;
|
|
effect = data_u8( data, module_data_idx + 2 ) & 0x0F;
|
|
param = data_u8( data, module_data_idx + 3 );
|
|
if( param == 0 && ( effect < 3 || effect == 0xA ) ) {
|
|
effect = 0;
|
|
}
|
|
if( param == 0 && ( effect == 5 || effect == 6 ) ) {
|
|
effect -= 2;
|
|
}
|
|
if( effect == 8 ) {
|
|
if( module->num_channels == 4 ) {
|
|
effect = param = 0;
|
|
} else if( param > 128 ) {
|
|
param = 128;
|
|
} else {
|
|
param = ( param * 255 ) >> 7;
|
|
}
|
|
}
|
|
pattern_data[ pat_data_idx + 3 ] = effect;
|
|
pattern_data[ pat_data_idx + 4 ] = param;
|
|
module_data_idx += 4;
|
|
}
|
|
}
|
|
module->num_instruments = 31;
|
|
module->instruments = (struct instrument*)calloc( module->num_instruments + 1, sizeof( struct instrument ) );
|
|
if( !module->instruments ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
instrument = &module->instruments[ 0 ];
|
|
instrument->num_samples = 1;
|
|
instrument->samples = (struct sample*)calloc( 1, sizeof( struct sample ) );
|
|
if( !instrument->samples ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
for( ins = 1; ins <= module->num_instruments; ins++ ) {
|
|
instrument = &module->instruments[ ins ];
|
|
instrument->num_samples = 1;
|
|
instrument->samples = (struct sample*)calloc( 1, sizeof( struct sample ) );
|
|
if( !instrument->samples ) {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
sample = &instrument->samples[ 0 ];
|
|
data_ascii( data, ins * 30 - 10, 22, instrument->name );
|
|
sample_length = data_u16be( data, ins * 30 + 12 ) * 2;
|
|
fine_tune = ( data_u8( data, ins * 30 + 14 ) & 0xF ) << 4;
|
|
sample->fine_tune = ( fine_tune & 0x7F ) - ( fine_tune & 0x80 );
|
|
sample->volume = data_u8( data, ins * 30 + 15 ) & 0x7F;
|
|
if( sample->volume > 64 ) {
|
|
sample->volume = 64;
|
|
}
|
|
loop_start = data_u16be( data, ins * 30 + 16 ) * 2;
|
|
loop_length = data_u16be( data, ins * 30 + 18 ) * 2;
|
|
if( loop_start + loop_length > sample_length ) {
|
|
loop_length = sample_length - loop_start;
|
|
}
|
|
if( loop_length < 4 ) {
|
|
loop_start = sample_length;
|
|
loop_length = 0;
|
|
}
|
|
sample->loop_start = loop_start;
|
|
sample->loop_length = loop_length;
|
|
sample->data = (short*)calloc( sample_length + 1, sizeof( short ) );
|
|
if( sample->data ) {
|
|
data_sam_s8( data, module_data_idx, sample_length, sample->data );
|
|
sample->data[ loop_start + loop_length ] = sample->data[ loop_start ];
|
|
} else {
|
|
dispose_module( module );
|
|
return NULL;
|
|
}
|
|
module_data_idx += sample_length;
|
|
}
|
|
}
|
|
return module;
|
|
}
|
|
|
|
/* Allocate and initialize a module from the specified data, returns NULL on error.
|
|
Message must point to a 64-character buffer to receive error messages. */
|
|
struct module* module_load( struct data *data, char *message ) {
|
|
char ascii[ 16 ];
|
|
struct module* module;
|
|
if( !memcmp( data_ascii( data, 0, 16, ascii ), "Extended Module:", 16 ) ) {
|
|
module = module_load_xm( data, message );
|
|
} else if( !memcmp( data_ascii( data, 44, 4, ascii ), "SCRM", 4 ) ) {
|
|
module = module_load_s3m( data, message );
|
|
} else {
|
|
module = module_load_mod( data, message );
|
|
}
|
|
return module;
|
|
}
|
|
|
|
static void pattern_get_note( struct pattern *pattern, int row, int chan, struct note *dest ) {
|
|
int offset = ( row * pattern->num_channels + chan ) * 5;
|
|
if( offset >= 0 && row < pattern->num_rows && chan < pattern->num_channels ) {
|
|
dest->key = pattern->data[ offset ];
|
|
dest->instrument = pattern->data[ offset + 1 ];
|
|
dest->volume = pattern->data[ offset + 2 ];
|
|
dest->effect = pattern->data[ offset + 3 ];
|
|
dest->param = pattern->data[ offset + 4 ];
|
|
} else {
|
|
memset( dest, 0, sizeof( struct note ) );
|
|
}
|
|
}
|
|
|
|
static void channel_init( struct channel *channel, struct replay *replay, int idx ) {
|
|
memset( channel, 0, sizeof( struct channel ) );
|
|
channel->replay = replay;
|
|
channel->id = idx;
|
|
channel->panning = replay->module->default_panning[ idx ];
|
|
channel->instrument = &replay->module->instruments[ 0 ];
|
|
channel->sample = &channel->instrument->samples[ 0 ];
|
|
channel->random_seed = ( idx + 1 ) * 0xABCDEF;
|
|
}
|
|
|
|
static void channel_volume_slide( struct channel *channel ) {
|
|
int up = channel->vol_slide_param >> 4;
|
|
int down = channel->vol_slide_param & 0xF;
|
|
if( down == 0xF && up > 0 ) {
|
|
/* Fine slide up.*/
|
|
if( channel->fx_count == 0 ) {
|
|
channel->volume += up;
|
|
}
|
|
} else if( up == 0xF && down > 0 ) {
|
|
/* Fine slide down.*/
|
|
if( channel->fx_count == 0 ) {
|
|
channel->volume -= down;
|
|
}
|
|
} else if( channel->fx_count > 0 || channel->replay->module->fast_vol_slides ) {
|
|
/* Normal.*/
|
|
channel->volume += up - down;
|
|
}
|
|
if( channel->volume > 64 ) {
|
|
channel->volume = 64;
|
|
}
|
|
if( channel->volume < 0 ) {
|
|
channel->volume = 0;
|
|
}
|
|
}
|
|
|
|
static void channel_porta_up( struct channel *channel, int param ) {
|
|
switch( param & 0xF0 ) {
|
|
case 0xE0: /* Extra-fine porta.*/
|
|
if( channel->fx_count == 0 ) {
|
|
channel->period -= param & 0xF;
|
|
}
|
|
break;
|
|
case 0xF0: /* Fine porta.*/
|
|
if( channel->fx_count == 0 ) {
|
|
channel->period -= ( param & 0xF ) << 2;
|
|
}
|
|
break;
|
|
default:/* Normal porta.*/
|
|
if( channel->fx_count > 0 ) {
|
|
channel->period -= param << 2;
|
|
}
|
|
break;
|
|
}
|
|
if( channel->period < 0 ) {
|
|
channel->period = 0;
|
|
}
|
|
}
|
|
|
|
static void channel_porta_down( struct channel *channel, int param ) {
|
|
if( channel->period > 0 ) {
|
|
switch( param & 0xF0 ) {
|
|
case 0xE0: /* Extra-fine porta.*/
|
|
if( channel->fx_count == 0 ) {
|
|
channel->period += param & 0xF;
|
|
}
|
|
break;
|
|
case 0xF0: /* Fine porta.*/
|
|
if( channel->fx_count == 0 ) {
|
|
channel->period += ( param & 0xF ) << 2;
|
|
}
|
|
break;
|
|
default:/* Normal porta.*/
|
|
if( channel->fx_count > 0 ) {
|
|
channel->period += param << 2;
|
|
}
|
|
break;
|
|
}
|
|
if( channel->period > 65535 ) {
|
|
channel->period = 65535;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void channel_tone_porta( struct channel *channel ) {
|
|
if( channel->period > 0 ) {
|
|
if( channel->period < channel->porta_period ) {
|
|
channel->period += channel->tone_porta_param << 2;
|
|
if( channel->period > channel->porta_period ) {
|
|
channel->period = channel->porta_period;
|
|
}
|
|
} else {
|
|
channel->period -= channel->tone_porta_param << 2;
|
|
if( channel->period < channel->porta_period ) {
|
|
channel->period = channel->porta_period;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int channel_waveform( struct channel *channel, int phase, int type ) {
|
|
int amplitude = 0;
|
|
switch( type ) {
|
|
default: /* Sine. */
|
|
amplitude = sine_table[ phase & 0x1F ];
|
|
if( ( phase & 0x20 ) > 0 ) {
|
|
amplitude = -amplitude;
|
|
}
|
|
break;
|
|
case 6: /* Saw Up.*/
|
|
amplitude = ( ( ( phase + 0x20 ) & 0x3F ) << 3 ) - 255;
|
|
break;
|
|
case 1: case 7: /* Saw Down. */
|
|
amplitude = 255 - ( ( ( phase + 0x20 ) & 0x3F ) << 3 );
|
|
break;
|
|
case 2: case 5: /* Square. */
|
|
amplitude = ( phase & 0x20 ) > 0 ? 255 : -255;
|
|
break;
|
|
case 3: case 8: /* Random. */
|
|
amplitude = ( channel->random_seed >> 20 ) - 255;
|
|
channel->random_seed = ( channel->random_seed * 65 + 17 ) & 0x1FFFFFFF;
|
|
break;
|
|
}
|
|
return amplitude;
|
|
}
|
|
|
|
static void channel_vibrato( struct channel *channel, int fine ) {
|
|
int wave = channel_waveform( channel, channel->vibrato_phase, channel->vibrato_type & 0x3 );
|
|
channel->vibrato_add = wave * channel->vibrato_depth >> ( fine ? 7 : 5 );
|
|
}
|
|
|
|
static void channel_tremolo( struct channel *channel ) {
|
|
int wave = channel_waveform( channel, channel->tremolo_phase, channel->tremolo_type & 0x3 );
|
|
channel->tremolo_add = wave * channel->tremolo_depth >> 6;
|
|
}
|
|
|
|
static void channel_tremor( struct channel *channel ) {
|
|
if( channel->retrig_count >= channel->tremor_on_ticks ) {
|
|
channel->tremolo_add = -64;
|
|
}
|
|
if( channel->retrig_count >= ( channel->tremor_on_ticks + channel->tremor_off_ticks ) ) {
|
|
channel->tremolo_add = channel->retrig_count = 0;
|
|
}
|
|
}
|
|
|
|
static void channel_retrig_vol_slide( struct channel *channel ) {
|
|
if( channel->retrig_count >= channel->retrig_ticks ) {
|
|
channel->retrig_count = channel->sample_idx = channel->sample_fra = 0;
|
|
switch( channel->retrig_volume ) {
|
|
case 0x1: channel->volume = channel->volume - 1; break;
|
|
case 0x2: channel->volume = channel->volume - 2; break;
|
|
case 0x3: channel->volume = channel->volume - 4; break;
|
|
case 0x4: channel->volume = channel->volume - 8; break;
|
|
case 0x5: channel->volume = channel->volume - 16; break;
|
|
case 0x6: channel->volume = channel->volume * 2 / 3; break;
|
|
case 0x7: channel->volume = channel->volume >> 1; break;
|
|
case 0x8: /* ? */ break;
|
|
case 0x9: channel->volume = channel->volume + 1; break;
|
|
case 0xA: channel->volume = channel->volume + 2; break;
|
|
case 0xB: channel->volume = channel->volume + 4; break;
|
|
case 0xC: channel->volume = channel->volume + 8; break;
|
|
case 0xD: channel->volume = channel->volume + 16; break;
|
|
case 0xE: channel->volume = channel->volume * 3 / 2; break;
|
|
case 0xF: channel->volume = channel->volume << 1; break;
|
|
}
|
|
if( channel->volume < 0 ) {
|
|
channel->volume = 0;
|
|
}
|
|
if( channel->volume > 64 ) {
|
|
channel->volume = 64;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void channel_trigger( struct channel *channel ) {
|
|
int key, sam, porta, period, fine_tune, ins = channel->note.instrument;
|
|
struct sample *sample;
|
|
if( ins > 0 && ins <= channel->replay->module->num_instruments ) {
|
|
channel->instrument = &channel->replay->module->instruments[ ins ];
|
|
key = channel->note.key < 97 ? channel->note.key : 0;
|
|
sam = channel->instrument->key_to_sample[ key ];
|
|
sample = &channel->instrument->samples[ sam ];
|
|
channel->volume = sample->volume >= 64 ? 64 : sample->volume & 0x3F;
|
|
if( sample->panning > 0 ) {
|
|
channel->panning = ( sample->panning - 1 ) & 0xFF;
|
|
}
|
|
if( channel->period > 0 && sample->loop_length > 1 ) {
|
|
/* Amiga trigger.*/
|
|
channel->sample = sample;
|
|
}
|
|
channel->sample_off = 0;
|
|
channel->vol_env_tick = channel->pan_env_tick = 0;
|
|
channel->fadeout_vol = 32768;
|
|
channel->key_on = 1;
|
|
}
|
|
if( channel->note.effect == 0x09 || channel->note.effect == 0x8F ) {
|
|
/* Set Sample Offset. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->offset_param = channel->note.param;
|
|
}
|
|
channel->sample_off = channel->offset_param << 8;
|
|
}
|
|
if( channel->note.volume >= 0x10 && channel->note.volume < 0x60 ) {
|
|
channel->volume = channel->note.volume < 0x50 ? channel->note.volume - 0x10 : 64;
|
|
}
|
|
switch( channel->note.volume & 0xF0 ) {
|
|
case 0x80: /* Fine Vol Down.*/
|
|
channel->volume -= channel->note.volume & 0xF;
|
|
if( channel->volume < 0 ) {
|
|
channel->volume = 0;
|
|
}
|
|
break;
|
|
case 0x90: /* Fine Vol Up.*/
|
|
channel->volume += channel->note.volume & 0xF;
|
|
if( channel->volume > 64 ) {
|
|
channel->volume = 64;
|
|
}
|
|
break;
|
|
case 0xA0: /* Set Vibrato Speed.*/
|
|
if( ( channel->note.volume & 0xF ) > 0 ) {
|
|
channel->vibrato_speed = channel->note.volume & 0xF;
|
|
}
|
|
break;
|
|
case 0xB0: /* Vibrato.*/
|
|
if( ( channel->note.volume & 0xF ) > 0 ) {
|
|
channel->vibrato_depth = channel->note.volume & 0xF;
|
|
}
|
|
channel_vibrato( channel, 0 );
|
|
break;
|
|
case 0xC0: /* Set Panning.*/
|
|
channel->panning = ( channel->note.volume & 0xF ) * 17;
|
|
break;
|
|
case 0xF0: /* Tone Porta.*/
|
|
if( ( channel->note.volume & 0xF ) > 0 ) {
|
|
channel->tone_porta_param = channel->note.volume & 0xF;
|
|
}
|
|
break;
|
|
}
|
|
if( channel->note.key > 0 ) {
|
|
if( channel->note.key > 96 ) {
|
|
channel->key_on = 0;
|
|
} else {
|
|
porta = ( channel->note.volume & 0xF0 ) == 0xF0 ||
|
|
channel->note.effect == 0x03 || channel->note.effect == 0x05 ||
|
|
channel->note.effect == 0x87 || channel->note.effect == 0x8C;
|
|
if( !porta ) {
|
|
ins = channel->instrument->key_to_sample[ channel->note.key ];
|
|
channel->sample = &channel->instrument->samples[ ins ];
|
|
}
|
|
fine_tune = channel->sample->fine_tune;
|
|
if( channel->note.effect == 0x75 || channel->note.effect == 0xF2 ) {
|
|
/* Set Fine Tune. */
|
|
fine_tune = ( ( channel->note.param & 0xF ) << 4 ) - 128;
|
|
}
|
|
key = channel->note.key + channel->sample->rel_note;
|
|
if( key < 1 ) {
|
|
key = 1;
|
|
}
|
|
if( key > 120 ) {
|
|
key = 120;
|
|
}
|
|
period = ( key << 6 ) + ( fine_tune >> 1 );
|
|
if( channel->replay->module->linear_periods ) {
|
|
channel->porta_period = 7744 - period;
|
|
} else {
|
|
channel->porta_period = 29021 * exp_2( ( period << FP_SHIFT ) / -768 ) >> FP_SHIFT;
|
|
}
|
|
if( !porta ) {
|
|
channel->period = channel->porta_period;
|
|
channel->sample_idx = channel->sample_off;
|
|
channel->sample_fra = 0;
|
|
if( channel->vibrato_type < 4 ) {
|
|
channel->vibrato_phase = 0;
|
|
}
|
|
if( channel->tremolo_type < 4 ) {
|
|
channel->tremolo_phase = 0;
|
|
}
|
|
channel->retrig_count = channel->av_count = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void channel_update_envelopes( struct channel *channel ) {
|
|
if( channel->instrument->vol_env.enabled ) {
|
|
if( !channel->key_on ) {
|
|
channel->fadeout_vol -= channel->instrument->vol_fadeout;
|
|
if( channel->fadeout_vol < 0 ) {
|
|
channel->fadeout_vol = 0;
|
|
}
|
|
}
|
|
channel->vol_env_tick = envelope_next_tick( &channel->instrument->vol_env,
|
|
channel->vol_env_tick, channel->key_on );
|
|
}
|
|
if( channel->instrument->pan_env.enabled ) {
|
|
channel->pan_env_tick = envelope_next_tick( &channel->instrument->pan_env,
|
|
channel->pan_env_tick, channel->key_on );
|
|
}
|
|
}
|
|
|
|
static void channel_auto_vibrato( struct channel *channel ) {
|
|
int sweep, rate, type, wave;
|
|
int depth = channel->instrument->vib_depth & 0x7F;
|
|
if( depth > 0 ) {
|
|
sweep = channel->instrument->vib_sweep & 0x7F;
|
|
rate = channel->instrument->vib_rate & 0x7F;
|
|
type = channel->instrument->vib_type;
|
|
if( channel->av_count < sweep ) {
|
|
depth = depth * channel->av_count / sweep;
|
|
}
|
|
wave = channel_waveform( channel, channel->av_count * rate >> 2, type + 4 );
|
|
channel->vibrato_add += wave * depth >> 8;
|
|
channel->av_count++;
|
|
}
|
|
}
|
|
|
|
static void channel_calculate_freq( struct channel *channel ) {
|
|
int per = channel->period + channel->vibrato_add;
|
|
if( channel->replay->module->linear_periods ) {
|
|
per = per - ( channel->arpeggio_add << 6 );
|
|
if( per < 28 || per > 7680 ) {
|
|
per = 7680;
|
|
}
|
|
channel->freq = ( ( channel->replay->module->c2_rate >> 4 )
|
|
* exp_2( ( ( 4608 - per ) << FP_SHIFT ) / 768 ) ) >> ( FP_SHIFT - 4 );
|
|
} else {
|
|
if( per > 29021 ) {
|
|
per = 29021;
|
|
}
|
|
per = ( per << FP_SHIFT ) / exp_2( ( channel->arpeggio_add << FP_SHIFT ) / 12 );
|
|
if( per < 28 ) {
|
|
per = 29021;
|
|
}
|
|
channel->freq = channel->replay->module->c2_rate * 1712 / per;
|
|
}
|
|
}
|
|
|
|
static void channel_calculate_ampl( struct channel *channel ) {
|
|
int vol, range, env_pan = 32, env_vol = channel->key_on ? 64 : 0;
|
|
if( channel->instrument->vol_env.enabled ) {
|
|
env_vol = envelope_calculate_ampl( &channel->instrument->vol_env, channel->vol_env_tick );
|
|
}
|
|
vol = channel->volume + channel->tremolo_add;
|
|
if( vol > 64 ) {
|
|
vol = 64;
|
|
}
|
|
if( vol < 0 ) {
|
|
vol = 0;
|
|
}
|
|
vol = ( vol * channel->replay->module->gain * FP_ONE ) >> 13;
|
|
vol = ( vol * channel->fadeout_vol ) >> 15;
|
|
channel->ampl = ( vol * channel->replay->global_vol * env_vol ) >> 12;
|
|
if( channel->instrument->pan_env.enabled ) {
|
|
env_pan = envelope_calculate_ampl( &channel->instrument->pan_env, channel->pan_env_tick );
|
|
}
|
|
range = ( channel->panning < 128 ) ? channel->panning : ( 255 - channel->panning );
|
|
channel->pann = channel->panning + ( range * ( env_pan - 32 ) >> 5 );
|
|
}
|
|
|
|
static void channel_tick( struct channel *channel ) {
|
|
channel->vibrato_add = 0;
|
|
channel->fx_count++;
|
|
channel->retrig_count++;
|
|
if( !( channel->note.effect == 0x7D && channel->fx_count <= channel->note.param ) ) {
|
|
switch( channel->note.volume & 0xF0 ) {
|
|
case 0x60: /* Vol Slide Down.*/
|
|
channel->volume -= channel->note.volume & 0xF;
|
|
if( channel->volume < 0 ) {
|
|
channel->volume = 0;
|
|
}
|
|
break;
|
|
case 0x70: /* Vol Slide Up.*/
|
|
channel->volume += channel->note.volume & 0xF;
|
|
if( channel->volume > 64 ) {
|
|
channel->volume = 64;
|
|
}
|
|
break;
|
|
case 0xB0: /* Vibrato.*/
|
|
channel->vibrato_phase += channel->vibrato_speed;
|
|
channel_vibrato( channel, 0 );
|
|
break;
|
|
case 0xD0: /* Pan Slide Left.*/
|
|
channel->panning -= channel->note.volume & 0xF;
|
|
if( channel->panning < 0 ) {
|
|
channel->panning = 0;
|
|
}
|
|
break;
|
|
case 0xE0: /* Pan Slide Right.*/
|
|
channel->panning += channel->note.volume & 0xF;
|
|
if( channel->panning > 255 ) {
|
|
channel->panning = 255;
|
|
}
|
|
break;
|
|
case 0xF0: /* Tone Porta.*/
|
|
channel_tone_porta( channel );
|
|
break;
|
|
}
|
|
}
|
|
switch( channel->note.effect ) {
|
|
case 0x01: case 0x86: /* Porta Up. */
|
|
channel_porta_up( channel, channel->porta_up_param );
|
|
break;
|
|
case 0x02: case 0x85: /* Porta Down. */
|
|
channel_porta_down( channel, channel->porta_down_param );
|
|
break;
|
|
case 0x03: case 0x87: /* Tone Porta. */
|
|
channel_tone_porta( channel );
|
|
break;
|
|
case 0x04: case 0x88: /* Vibrato. */
|
|
channel->vibrato_phase += channel->vibrato_speed;
|
|
channel_vibrato( channel, 0 );
|
|
break;
|
|
case 0x05: case 0x8C: /* Tone Porta + Vol Slide. */
|
|
channel_tone_porta( channel );
|
|
channel_volume_slide( channel );
|
|
break;
|
|
case 0x06: case 0x8B: /* Vibrato + Vol Slide. */
|
|
channel->vibrato_phase += channel->vibrato_speed;
|
|
channel_vibrato( channel, 0 );
|
|
channel_volume_slide( channel );
|
|
break;
|
|
case 0x07: case 0x92: /* Tremolo. */
|
|
channel->tremolo_phase += channel->tremolo_speed;
|
|
channel_tremolo( channel );
|
|
break;
|
|
case 0x0A: case 0x84: /* Vol Slide. */
|
|
channel_volume_slide( channel );
|
|
break;
|
|
case 0x11: /* Global Volume Slide. */
|
|
channel->replay->global_vol = channel->replay->global_vol
|
|
+ ( channel->gvol_slide_param >> 4 )
|
|
- ( channel->gvol_slide_param & 0xF );
|
|
if( channel->replay->global_vol < 0 ) {
|
|
channel->replay->global_vol = 0;
|
|
}
|
|
if( channel->replay->global_vol > 64 ) {
|
|
channel->replay->global_vol = 64;
|
|
}
|
|
break;
|
|
case 0x19: /* Panning Slide. */
|
|
channel->panning = channel->panning
|
|
+ ( channel->pan_slide_param >> 4 )
|
|
- ( channel->pan_slide_param & 0xF );
|
|
if( channel->panning < 0 ) {
|
|
channel->panning = 0;
|
|
}
|
|
if( channel->panning > 255 ) {
|
|
channel->panning = 255;
|
|
}
|
|
break;
|
|
case 0x1B: case 0x91: /* Retrig + Vol Slide. */
|
|
channel_retrig_vol_slide( channel );
|
|
break;
|
|
case 0x1D: case 0x89: /* Tremor. */
|
|
channel_tremor( channel );
|
|
break;
|
|
case 0x79: /* Retrig. */
|
|
if( channel->fx_count >= channel->note.param ) {
|
|
channel->fx_count = 0;
|
|
channel->sample_idx = channel->sample_fra = 0;
|
|
}
|
|
break;
|
|
case 0x7C: case 0xFC: /* Note Cut. */
|
|
if( channel->note.param == channel->fx_count ) {
|
|
channel->volume = 0;
|
|
}
|
|
break;
|
|
case 0x7D: case 0xFD: /* Note Delay. */
|
|
if( channel->note.param == channel->fx_count ) {
|
|
channel_trigger( channel );
|
|
}
|
|
break;
|
|
case 0x8A: /* Arpeggio. */
|
|
if( channel->fx_count == 1 ) {
|
|
channel->arpeggio_add = channel->arpeggio_param >> 4;
|
|
} else if( channel->fx_count == 2 ) {
|
|
channel->arpeggio_add = channel->arpeggio_param & 0xF;
|
|
} else {
|
|
channel->arpeggio_add = channel->fx_count = 0;
|
|
}
|
|
break;
|
|
case 0x95: /* Fine Vibrato. */
|
|
channel->vibrato_phase += channel->vibrato_speed;
|
|
channel_vibrato( channel, 1 );
|
|
break;
|
|
}
|
|
channel_auto_vibrato( channel );
|
|
channel_calculate_freq( channel );
|
|
channel_calculate_ampl( channel );
|
|
channel_update_envelopes( channel );
|
|
}
|
|
|
|
static void channel_row( struct channel *channel, struct note *note ) {
|
|
channel->note = *note;
|
|
channel->retrig_count++;
|
|
channel->vibrato_add = channel->tremolo_add = channel->arpeggio_add = channel->fx_count = 0;
|
|
if( !( ( note->effect == 0x7D || note->effect == 0xFD ) && note->param > 0 ) ) {
|
|
/* Not note delay.*/
|
|
channel_trigger( channel );
|
|
}
|
|
switch( channel->note.effect ) {
|
|
case 0x01: case 0x86: /* Porta Up. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->porta_up_param = channel->note.param;
|
|
}
|
|
channel_porta_up( channel, channel->porta_up_param );
|
|
break;
|
|
case 0x02: case 0x85: /* Porta Down. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->porta_down_param = channel->note.param;
|
|
}
|
|
channel_porta_down( channel, channel->porta_down_param );
|
|
break;
|
|
case 0x03: case 0x87: /* Tone Porta. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->tone_porta_param = channel->note.param;
|
|
}
|
|
break;
|
|
case 0x04: case 0x88: /* Vibrato. */
|
|
if( ( channel->note.param >> 4 ) > 0 ) {
|
|
channel->vibrato_speed = channel->note.param >> 4;
|
|
}
|
|
if( ( channel->note.param & 0xF ) > 0 ) {
|
|
channel->vibrato_depth = channel->note.param & 0xF;
|
|
}
|
|
channel_vibrato( channel, 0 );
|
|
break;
|
|
case 0x05: case 0x8C: /* Tone Porta + Vol Slide. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->vol_slide_param = channel->note.param;
|
|
}
|
|
channel_volume_slide( channel );
|
|
break;
|
|
case 0x06: case 0x8B: /* Vibrato + Vol Slide. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->vol_slide_param = channel->note.param;
|
|
}
|
|
channel_vibrato( channel, 0 );
|
|
channel_volume_slide( channel );
|
|
break;
|
|
case 0x07: case 0x92: /* Tremolo. */
|
|
if( ( channel->note.param >> 4 ) > 0 ) {
|
|
channel->tremolo_speed = channel->note.param >> 4;
|
|
}
|
|
if( ( channel->note.param & 0xF ) > 0 ) {
|
|
channel->tremolo_depth = channel->note.param & 0xF;
|
|
}
|
|
channel_tremolo( channel );
|
|
break;
|
|
case 0x08: /* Set Panning.*/
|
|
channel->panning = channel->note.param & 0xFF;
|
|
break;
|
|
case 0x0A: case 0x84: /* Vol Slide. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->vol_slide_param = channel->note.param;
|
|
}
|
|
channel_volume_slide( channel );
|
|
break;
|
|
case 0x0C: /* Set Volume. */
|
|
channel->volume = channel->note.param >= 64 ? 64 : channel->note.param & 0x3F;
|
|
break;
|
|
case 0x10: case 0x96: /* Set Global Volume. */
|
|
channel->replay->global_vol = channel->note.param >= 64 ? 64 : channel->note.param & 0x3F;
|
|
break;
|
|
case 0x11: /* Global Volume Slide. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->gvol_slide_param = channel->note.param;
|
|
}
|
|
break;
|
|
case 0x14: /* Key Off. */
|
|
channel->key_on = 0;
|
|
break;
|
|
case 0x15: /* Set Envelope Tick. */
|
|
channel->vol_env_tick = channel->pan_env_tick = channel->note.param & 0xFF;
|
|
break;
|
|
case 0x19: /* Panning Slide. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->pan_slide_param = channel->note.param;
|
|
}
|
|
break;
|
|
case 0x1B: case 0x91: /* Retrig + Vol Slide. */
|
|
if( ( channel->note.param >> 4 ) > 0 ) {
|
|
channel->retrig_volume = channel->note.param >> 4;
|
|
}
|
|
if( ( channel->note.param & 0xF ) > 0 ) {
|
|
channel->retrig_ticks = channel->note.param & 0xF;
|
|
}
|
|
channel_retrig_vol_slide( channel );
|
|
break;
|
|
case 0x1D: case 0x89: /* Tremor. */
|
|
if( ( channel->note.param >> 4 ) > 0 ) {
|
|
channel->tremor_on_ticks = channel->note.param >> 4;
|
|
}
|
|
if( ( channel->note.param & 0xF ) > 0 ) {
|
|
channel->tremor_off_ticks = channel->note.param & 0xF;
|
|
}
|
|
channel_tremor( channel );
|
|
break;
|
|
case 0x21: /* Extra Fine Porta. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->xfine_porta_param = channel->note.param;
|
|
}
|
|
switch( channel->xfine_porta_param & 0xF0 ) {
|
|
case 0x10:
|
|
channel_porta_up( channel, 0xE0 | ( channel->xfine_porta_param & 0xF ) );
|
|
break;
|
|
case 0x20:
|
|
channel_porta_down( channel, 0xE0 | ( channel->xfine_porta_param & 0xF ) );
|
|
break;
|
|
}
|
|
break;
|
|
case 0x71: /* Fine Porta Up. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->fine_porta_up_param = channel->note.param;
|
|
}
|
|
channel_porta_up( channel, 0xF0 | ( channel->fine_porta_up_param & 0xF ) );
|
|
break;
|
|
case 0x72: /* Fine Porta Down. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->fine_porta_down_param = channel->note.param;
|
|
}
|
|
channel_porta_down( channel, 0xF0 | ( channel->fine_porta_down_param & 0xF ) );
|
|
break;
|
|
case 0x74: case 0xF3: /* Set Vibrato Waveform. */
|
|
if( channel->note.param < 8 ) {
|
|
channel->vibrato_type = channel->note.param;
|
|
}
|
|
break;
|
|
case 0x77: case 0xF4: /* Set Tremolo Waveform. */
|
|
if( channel->note.param < 8 ) {
|
|
channel->tremolo_type = channel->note.param;
|
|
}
|
|
break;
|
|
case 0x7A: /* Fine Vol Slide Up. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->fine_vslide_up_param = channel->note.param;
|
|
}
|
|
channel->volume += channel->fine_vslide_up_param;
|
|
if( channel->volume > 64 ) {
|
|
channel->volume = 64;
|
|
}
|
|
break;
|
|
case 0x7B: /* Fine Vol Slide Down. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->fine_vslide_down_param = channel->note.param;
|
|
}
|
|
channel->volume -= channel->fine_vslide_down_param;
|
|
if( channel->volume < 0 ) {
|
|
channel->volume = 0;
|
|
}
|
|
break;
|
|
case 0x7C: case 0xFC: /* Note Cut. */
|
|
if( channel->note.param <= 0 ) {
|
|
channel->volume = 0;
|
|
}
|
|
break;
|
|
case 0x8A: /* Arpeggio. */
|
|
if( channel->note.param > 0 ) {
|
|
channel->arpeggio_param = channel->note.param;
|
|
}
|
|
break;
|
|
case 0x95: /* Fine Vibrato.*/
|
|
if( ( channel->note.param >> 4 ) > 0 ) {
|
|
channel->vibrato_speed = channel->note.param >> 4;
|
|
}
|
|
if( ( channel->note.param & 0xF ) > 0 ) {
|
|
channel->vibrato_depth = channel->note.param & 0xF;
|
|
}
|
|
channel_vibrato( channel, 1 );
|
|
break;
|
|
case 0xF8: /* Set Panning. */
|
|
channel->panning = channel->note.param * 17;
|
|
break;
|
|
}
|
|
channel_auto_vibrato( channel );
|
|
channel_calculate_freq( channel );
|
|
channel_calculate_ampl( channel );
|
|
channel_update_envelopes( channel );
|
|
}
|
|
|
|
static void channel_resample( struct channel *channel, int *mix_buf,
|
|
int offset, int count, int sample_rate, int interpolate ) {
|
|
struct sample *sample = channel->sample;
|
|
int l_gain, r_gain, sam_idx, sam_fra, step;
|
|
int loop_len, loop_end, out_idx, out_end, y, m, c;
|
|
short *sample_data = channel->sample->data;
|
|
if( channel->ampl > 0 ) {
|
|
l_gain = channel->ampl * ( 255 - channel->pann ) >> 8;
|
|
r_gain = channel->ampl * channel->pann >> 8;
|
|
sam_idx = channel->sample_idx;
|
|
sam_fra = channel->sample_fra;
|
|
step = ( channel->freq << ( FP_SHIFT - 3 ) ) / ( sample_rate >> 3 );
|
|
loop_len = sample->loop_length;
|
|
loop_end = sample->loop_start + loop_len;
|
|
out_idx = offset * 2;
|
|
out_end = ( offset + count ) * 2;
|
|
if( interpolate ) {
|
|
while( out_idx < out_end ) {
|
|
if( sam_idx >= loop_end ) {
|
|
if( loop_len > 1 ) {
|
|
while( sam_idx >= loop_end ) {
|
|
sam_idx -= loop_len;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
c = sample_data[ sam_idx ];
|
|
m = sample_data[ sam_idx + 1 ] - c;
|
|
y = ( ( m * sam_fra ) >> FP_SHIFT ) + c;
|
|
mix_buf[ out_idx++ ] += ( y * l_gain ) >> FP_SHIFT;
|
|
mix_buf[ out_idx++ ] += ( y * r_gain ) >> FP_SHIFT;
|
|
sam_fra += step;
|
|
sam_idx += sam_fra >> FP_SHIFT;
|
|
sam_fra &= FP_MASK;
|
|
}
|
|
} else {
|
|
while( out_idx < out_end ) {
|
|
if( sam_idx >= loop_end ) {
|
|
if( loop_len > 1 ) {
|
|
while( sam_idx >= loop_end ) {
|
|
sam_idx -= loop_len;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
y = sample_data[ sam_idx ];
|
|
mix_buf[ out_idx++ ] += ( y * l_gain ) >> FP_SHIFT;
|
|
mix_buf[ out_idx++ ] += ( y * r_gain ) >> FP_SHIFT;
|
|
sam_fra += step;
|
|
sam_idx += sam_fra >> FP_SHIFT;
|
|
sam_fra &= FP_MASK;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void channel_update_sample_idx( struct channel *channel, int count, int sample_rate ) {
|
|
struct sample *sample = channel->sample;
|
|
int step = ( channel->freq << ( FP_SHIFT - 3 ) ) / ( sample_rate >> 3 );
|
|
channel->sample_fra += step * count;
|
|
channel->sample_idx += channel->sample_fra >> FP_SHIFT;
|
|
if( channel->sample_idx > sample->loop_start ) {
|
|
if( sample->loop_length > 1 ) {
|
|
channel->sample_idx = sample->loop_start
|
|
+ ( channel->sample_idx - sample->loop_start ) % sample->loop_length;
|
|
} else {
|
|
channel->sample_idx = sample->loop_start;
|
|
}
|
|
}
|
|
channel->sample_fra &= FP_MASK;
|
|
}
|
|
|
|
static void replay_row( struct replay *replay ) {
|
|
int idx, count;
|
|
struct note note;
|
|
struct pattern *pattern;
|
|
struct channel *channel;
|
|
struct module *module = replay->module;
|
|
if( replay->next_row < 0 ) {
|
|
replay->break_pos = replay->seq_pos + 1;
|
|
replay->next_row = 0;
|
|
}
|
|
if( replay->break_pos >= 0 ) {
|
|
if( replay->break_pos >= module->sequence_len ) {
|
|
replay->break_pos = replay->next_row = 0;
|
|
}
|
|
while( module->sequence[ replay->break_pos ] >= module->num_patterns ) {
|
|
replay->break_pos++;
|
|
if( replay->break_pos >= module->sequence_len ) {
|
|
replay->break_pos = replay->next_row = 0;
|
|
}
|
|
}
|
|
replay->seq_pos = replay->break_pos;
|
|
for( idx = 0; idx < module->num_channels; idx++ ) {
|
|
replay->channels[ idx ].pl_row = 0;
|
|
}
|
|
replay->break_pos = -1;
|
|
}
|
|
pattern = &module->patterns[ module->sequence[ replay->seq_pos ] ];
|
|
replay->row = replay->next_row;
|
|
if( replay->row >= pattern->num_rows ) {
|
|
replay->row = 0;
|
|
}
|
|
if( replay->play_count && replay->play_count[ 0 ] ) {
|
|
count = replay->play_count[ replay->seq_pos ][ replay->row ];
|
|
if( replay->pl_count < 0 && count < 127 ) {
|
|
replay->play_count[ replay->seq_pos ][ replay->row ] = count + 1;
|
|
}
|
|
}
|
|
replay->next_row = replay->row + 1;
|
|
if( replay->next_row >= pattern->num_rows ) {
|
|
replay->next_row = -1;
|
|
}
|
|
for( idx = 0; idx < module->num_channels; idx++ ) {
|
|
channel = &replay->channels[ idx ];
|
|
pattern_get_note( pattern, replay->row, idx, ¬e );
|
|
if( note.effect == 0xE ) {
|
|
note.effect = 0x70 | ( note.param >> 4 );
|
|
note.param &= 0xF;
|
|
}
|
|
if( note.effect == 0x93 ) {
|
|
note.effect = 0xF0 | ( note.param >> 4 );
|
|
note.param &= 0xF;
|
|
}
|
|
if( note.effect == 0 && note.param > 0 ) {
|
|
note.effect = 0x8A;
|
|
}
|
|
channel_row( channel, ¬e );
|
|
switch( note.effect ) {
|
|
case 0x81: /* Set Speed. */
|
|
if( note.param > 0 ) {
|
|
replay->tick = replay->speed = note.param;
|
|
}
|
|
break;
|
|
case 0xB: case 0x82: /* Pattern Jump.*/
|
|
if( replay->pl_count < 0 ) {
|
|
replay->break_pos = note.param;
|
|
replay->next_row = 0;
|
|
}
|
|
break;
|
|
case 0xD: case 0x83: /* Pattern Break.*/
|
|
if( replay->pl_count < 0 ) {
|
|
if( replay->break_pos < 0 ) {
|
|
replay->break_pos = replay->seq_pos + 1;
|
|
}
|
|
replay->next_row = ( note.param >> 4 ) * 10 + ( note.param & 0xF );
|
|
}
|
|
break;
|
|
case 0xF: /* Set Speed/Tempo.*/
|
|
if( note.param > 0 ) {
|
|
if( note.param < 32 ) {
|
|
replay->tick = replay->speed = note.param;
|
|
} else {
|
|
replay->tempo = note.param;
|
|
}
|
|
}
|
|
break;
|
|
case 0x94: /* Set Tempo.*/
|
|
if( note.param > 32 ) {
|
|
replay->tempo = note.param;
|
|
}
|
|
break;
|
|
case 0x76: case 0xFB : /* Pattern Loop.*/
|
|
if( note.param == 0 ) {
|
|
/* Set loop marker on this channel. */
|
|
channel->pl_row = replay->row;
|
|
}
|
|
if( channel->pl_row < replay->row && replay->break_pos < 0 ) {
|
|
/* Marker valid. */
|
|
if( replay->pl_count < 0 ) {
|
|
/* Not already looping, begin. */
|
|
replay->pl_count = note.param;
|
|
replay->pl_chan = idx;
|
|
}
|
|
if( replay->pl_chan == idx ) {
|
|
/* Next Loop.*/
|
|
if( replay->pl_count == 0 ) {
|
|
/* Loop finished. Invalidate current marker. */
|
|
channel->pl_row = replay->row + 1;
|
|
} else {
|
|
/* Loop. */
|
|
replay->next_row = channel->pl_row;
|
|
}
|
|
replay->pl_count--;
|
|
}
|
|
}
|
|
break;
|
|
case 0x7E: case 0xFE: /* Pattern Delay.*/
|
|
replay->tick = replay->speed + replay->speed * note.param;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int replay_tick( struct replay *replay ) {
|
|
int idx, num_channels, count = 1;
|
|
if( --replay->tick <= 0 ) {
|
|
replay->tick = replay->speed;
|
|
replay_row( replay );
|
|
} else {
|
|
num_channels = replay->module->num_channels;
|
|
for( idx = 0; idx < num_channels; idx++ ) {
|
|
channel_tick( &replay->channels[ idx ] );
|
|
}
|
|
}
|
|
if( replay->play_count && replay->play_count[ 0 ] ) {
|
|
count = replay->play_count[ replay->seq_pos ][ replay->row ] - 1;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
static int module_init_play_count( struct module *module, char **play_count ) {
|
|
int idx, pat, rows, len = 0;
|
|
for( idx = 0; idx < module->sequence_len; idx++ ) {
|
|
pat = module->sequence[ idx ];
|
|
rows = ( pat < module->num_patterns ) ? module->patterns[ pat ].num_rows : 0;
|
|
if( play_count ) {
|
|
play_count[ idx ] = play_count[ 0 ] ? &play_count[ 0 ][ len ] : NULL;
|
|
}
|
|
len += rows;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/* Set the pattern in the sequence to play. The tempo is reset to the default. */
|
|
void replay_set_sequence_pos( struct replay *replay, int pos ) {
|
|
int idx;
|
|
struct module *module = replay->module;
|
|
if( pos >= module->sequence_len ) {
|
|
pos = 0;
|
|
}
|
|
replay->break_pos = pos;
|
|
replay->next_row = 0;
|
|
replay->tick = 1;
|
|
replay->global_vol = module->default_gvol;
|
|
replay->speed = module->default_speed > 0 ? module->default_speed : 6;
|
|
replay->tempo = module->default_tempo > 0 ? module->default_tempo : 125;
|
|
replay->pl_count = replay->pl_chan = -1;
|
|
if( replay->play_count ) {
|
|
free( replay->play_count[ 0 ] );
|
|
free( replay->play_count );
|
|
}
|
|
replay->play_count = (char**)calloc( module->sequence_len, sizeof( char * ) );
|
|
if( replay->play_count ) {
|
|
replay->play_count[ 0 ] = (char*)calloc( module_init_play_count( module, NULL ), sizeof( char ) );
|
|
module_init_play_count( module, replay->play_count );
|
|
}
|
|
for( idx = 0; idx < module->num_channels; idx++ ) {
|
|
channel_init( &replay->channels[ idx ], replay, idx );
|
|
}
|
|
memset( replay->ramp_buf, 0, 128 * sizeof( int ) );
|
|
replay_tick( replay );
|
|
}
|
|
|
|
/* Deallocate the specified replay. */
|
|
void dispose_replay( struct replay *replay ) {
|
|
if( replay->play_count ) {
|
|
free( replay->play_count[ 0 ] );
|
|
free( replay->play_count );
|
|
}
|
|
free( replay->ramp_buf );
|
|
free( replay->channels );
|
|
free( replay );
|
|
}
|
|
|
|
/* Allocate and initialize a replay with the specified sampling rate and interpolation. */
|
|
struct replay* new_replay( struct module *module, int sample_rate, int interpolation ) {
|
|
struct replay *replay = (struct replay*)calloc( 1, sizeof( struct replay ) );
|
|
if( replay ) {
|
|
replay->module = module;
|
|
replay->sample_rate = sample_rate;
|
|
replay->interpolation = interpolation;
|
|
replay->ramp_buf = (int*)calloc( 128, sizeof( int ) );
|
|
replay->channels = (struct channel*)calloc( module->num_channels, sizeof( struct channel ) );
|
|
if( replay->ramp_buf && replay->channels ) {
|
|
replay_set_sequence_pos( replay, 0 );
|
|
} else {
|
|
dispose_replay( replay );
|
|
replay = NULL;
|
|
}
|
|
}
|
|
return replay;
|
|
}
|
|
|
|
static int calculate_tick_len( int tempo, int sample_rate ) {
|
|
return ( sample_rate * 5 ) / ( tempo * 2 );
|
|
}
|
|
|
|
/* Returns the length of the output buffer required by replay_get_audio(). */
|
|
int calculate_mix_buf_len( int sample_rate ) {
|
|
return ( calculate_tick_len( 32, sample_rate ) + 65 ) * 4;
|
|
}
|
|
|
|
/* Returns the song duration in samples at the current sampling rate. */
|
|
int replay_calculate_duration( struct replay *replay ) {
|
|
int count = 0, duration = 0;
|
|
replay_set_sequence_pos( replay, 0 );
|
|
while( count < 1 ) {
|
|
duration += calculate_tick_len( replay->tempo, replay->sample_rate );
|
|
count = replay_tick( replay );
|
|
}
|
|
replay_set_sequence_pos( replay, 0 );
|
|
return duration;
|
|
}
|
|
|
|
/* Seek to approximately the specified sample position.
|
|
The actual sample position reached is returned. */
|
|
int replay_seek( struct replay *replay, int sample_pos ) {
|
|
int idx, tick_len, current_pos = 0;
|
|
replay_set_sequence_pos( replay, 0 );
|
|
tick_len = calculate_tick_len( replay->tempo, replay->sample_rate );
|
|
while( ( sample_pos - current_pos ) >= tick_len ) {
|
|
for( idx = 0; idx < replay->module->num_channels; idx++ ) {
|
|
channel_update_sample_idx( &replay->channels[ idx ],
|
|
tick_len * 2, replay->sample_rate * 2 );
|
|
}
|
|
current_pos += tick_len;
|
|
replay_tick( replay );
|
|
tick_len = calculate_tick_len( replay->tempo, replay->sample_rate );
|
|
}
|
|
return current_pos;
|
|
}
|
|
|
|
static void replay_volume_ramp( struct replay *replay, int *mix_buf, int tick_len ) {
|
|
int idx, a1, a2, ramp_rate = 256 * 2048 / replay->sample_rate;
|
|
for( idx = 0, a1 = 0; a1 < 256; idx += 2, a1 += ramp_rate ) {
|
|
a2 = 256 - a1;
|
|
mix_buf[ idx ] = ( mix_buf[ idx ] * a1 + replay->ramp_buf[ idx ] * a2 ) >> 8;
|
|
mix_buf[ idx + 1 ] = ( mix_buf[ idx + 1 ] * a1 + replay->ramp_buf[ idx + 1 ] * a2 ) >> 8;
|
|
}
|
|
memcpy( replay->ramp_buf, &mix_buf[ tick_len * 2 ], 128 * sizeof( int ) );
|
|
}
|
|
|
|
/* 2:1 downsampling with simple but effective anti-aliasing. Buf must contain count * 2 + 1 stereo samples. */
|
|
static void downsample( int *buf, int count ) {
|
|
int idx, out_idx, out_len = count * 2;
|
|
for( idx = 0, out_idx = 0; out_idx < out_len; idx += 4, out_idx += 2 ) {
|
|
buf[ out_idx ] = ( buf[ idx ] >> 2 ) + ( buf[ idx + 2 ] >> 1 ) + ( buf[ idx + 4 ] >> 2 );
|
|
buf[ out_idx + 1 ] = ( buf[ idx + 1 ] >> 2 ) + ( buf[ idx + 3 ] >> 1 ) + ( buf[ idx + 5 ] >> 2 );
|
|
}
|
|
}
|
|
|
|
/* Generates audio and returns the number of stereo samples written into mix_buf.
|
|
Individual channels may be excluded using the mute bitmask. */
|
|
int replay_get_audio( struct replay *replay, int *mix_buf, int mute ) {
|
|
struct channel *channel;
|
|
int idx, num_channels, tick_len = calculate_tick_len( replay->tempo, replay->sample_rate );
|
|
/* Clear output buffer. */
|
|
memset( mix_buf, 0, ( tick_len + 65 ) * 4 * sizeof( int ) );
|
|
/* Resample. */
|
|
num_channels = replay->module->num_channels;
|
|
for( idx = 0; idx < num_channels; idx++ ) {
|
|
channel = &replay->channels[ idx ];
|
|
if( !( mute & 1 ) ) {
|
|
channel_resample( channel, mix_buf, 0, ( tick_len + 65 ) * 2,
|
|
replay->sample_rate * 2, replay->interpolation );
|
|
}
|
|
channel_update_sample_idx( channel, tick_len * 2, replay->sample_rate * 2 );
|
|
mute >>= 1;
|
|
}
|
|
downsample( mix_buf, tick_len + 64 );
|
|
replay_volume_ramp( replay, mix_buf, tick_len );
|
|
replay_tick( replay );
|
|
return tick_len;
|
|
}
|
|
|
|
/* Returns the currently playing pattern in the sequence.*/
|
|
int replay_get_sequence_pos( struct replay *replay ) {
|
|
return replay->seq_pos;
|
|
}
|
|
|
|
/* Returns the currently playing row in the pattern. */
|
|
int replay_get_row( struct replay *replay ) {
|
|
return replay->row;
|
|
}
|