annotate decoders/timidity/mix.c @ 533:cad2940e992f stable-1.0

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 17 Apr 2008 17:55:22 +0000
parents 2d887640d300
children
rev   line source
199
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1 /*
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2
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3 TiMidity -- Experimental MIDI to WAVE converter
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4 Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
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5
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6 Suddenly, you realize that this program is free software; you get
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7 an overwhelming urge to redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 2 of the License, or (at your
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10 option) any later version.
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11
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12 This program is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received another copy of the GNU General Public
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18 License along with this program; if not, write to the Free
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19 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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20 I bet they'll be amazed.
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21
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22 mix.c */
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23
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24 #if HAVE_CONFIG_H
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25 # include <config.h>
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26 #endif
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27
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28 #include <math.h>
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31
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32 #include "SDL_sound.h"
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33
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34 #define __SDL_SOUND_INTERNAL__
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35 #include "SDL_sound_internal.h"
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36
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37 #include "timidity.h"
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38 #include "options.h"
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39 #include "instrum.h"
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40 #include "playmidi.h"
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41 #include "output.h"
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42 #include "tables.h"
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43 #include "resample.h"
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44 #include "mix.h"
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45
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46 /* Returns 1 if envelope runs out */
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47 int recompute_envelope(MidiSong *song, int v)
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48 {
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49 int stage;
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50
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51 stage = song->voice[v].envelope_stage;
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52
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53 if (stage>5)
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54 {
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55 /* Envelope ran out. */
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56 song->voice[v].status = VOICE_FREE;
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57 return 1;
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58 }
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59
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60 if (song->voice[v].sample->modes & MODES_ENVELOPE)
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61 {
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62 if (song->voice[v].status==VOICE_ON || song->voice[v].status==VOICE_SUSTAINED)
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63 {
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64 if (stage>2)
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65 {
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66 /* Freeze envelope until note turns off. Trumpets want this. */
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67 song->voice[v].envelope_increment=0;
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68 return 0;
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69 }
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70 }
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71 }
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72 song->voice[v].envelope_stage=stage+1;
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73
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74 if (song->voice[v].envelope_volume==song->voice[v].sample->envelope_offset[stage])
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75 return recompute_envelope(song, v);
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76 song->voice[v].envelope_target = song->voice[v].sample->envelope_offset[stage];
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77 song->voice[v].envelope_increment = song->voice[v].sample->envelope_rate[stage];
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78 if (song->voice[v].envelope_target < song->voice[v].envelope_volume)
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79 song->voice[v].envelope_increment = -song->voice[v].envelope_increment;
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80 return 0;
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81 }
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82
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83 void apply_envelope_to_amp(MidiSong *song, int v)
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84 {
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85 float lamp = song->voice[v].left_amp, ramp;
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86 Sint32 la,ra;
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87 if (song->voice[v].panned == PANNED_MYSTERY)
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88 {
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89 ramp = song->voice[v].right_amp;
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90 if (song->voice[v].tremolo_phase_increment)
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91 {
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92 lamp *= song->voice[v].tremolo_volume;
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93 ramp *= song->voice[v].tremolo_volume;
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94 }
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95 if (song->voice[v].sample->modes & MODES_ENVELOPE)
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96 {
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97 lamp *= (float)vol_table[song->voice[v].envelope_volume>>23];
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98 ramp *= (float)vol_table[song->voice[v].envelope_volume>>23];
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99 }
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100
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101 la = (Sint32)FSCALE(lamp,AMP_BITS);
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102
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103 if (la>MAX_AMP_VALUE)
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104 la=MAX_AMP_VALUE;
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105
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106 ra = (Sint32)FSCALE(ramp,AMP_BITS);
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107 if (ra>MAX_AMP_VALUE)
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108 ra=MAX_AMP_VALUE;
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109
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110 song->voice[v].left_mix = la;
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111 song->voice[v].right_mix = ra;
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112 }
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113 else
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114 {
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115 if (song->voice[v].tremolo_phase_increment)
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116 lamp *= song->voice[v].tremolo_volume;
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117 if (song->voice[v].sample->modes & MODES_ENVELOPE)
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118 lamp *= (float)vol_table[song->voice[v].envelope_volume>>23];
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119
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120 la = (Sint32)FSCALE(lamp,AMP_BITS);
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121
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122 if (la>MAX_AMP_VALUE)
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123 la=MAX_AMP_VALUE;
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124
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125 song->voice[v].left_mix = la;
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126 }
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127 }
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128
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129 static int update_envelope(MidiSong *song, int v)
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130 {
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131 song->voice[v].envelope_volume += song->voice[v].envelope_increment;
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132 /* Why is there no ^^ operator?? */
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133 if (((song->voice[v].envelope_increment < 0) &&
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134 (song->voice[v].envelope_volume <= song->voice[v].envelope_target)) ||
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135 ((song->voice[v].envelope_increment > 0) &&
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136 (song->voice[v].envelope_volume >= song->voice[v].envelope_target)))
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137 {
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138 song->voice[v].envelope_volume = song->voice[v].envelope_target;
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139 if (recompute_envelope(song, v))
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140 return 1;
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141 }
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142 return 0;
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143 }
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144
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145 static void update_tremolo(MidiSong *song, int v)
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146 {
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147 Sint32 depth = song->voice[v].sample->tremolo_depth << 7;
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148
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149 if (song->voice[v].tremolo_sweep)
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150 {
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151 /* Update sweep position */
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152
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153 song->voice[v].tremolo_sweep_position += song->voice[v].tremolo_sweep;
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154 if (song->voice[v].tremolo_sweep_position >= (1 << SWEEP_SHIFT))
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155 song->voice[v].tremolo_sweep=0; /* Swept to max amplitude */
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156 else
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157 {
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158 /* Need to adjust depth */
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159 depth *= song->voice[v].tremolo_sweep_position;
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160 depth >>= SWEEP_SHIFT;
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161 }
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162 }
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163
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164 song->voice[v].tremolo_phase += song->voice[v].tremolo_phase_increment;
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165
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166 /* if (song->voice[v].tremolo_phase >= (SINE_CYCLE_LENGTH<<RATE_SHIFT))
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167 song->voice[v].tremolo_phase -= SINE_CYCLE_LENGTH<<RATE_SHIFT; */
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168
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169 song->voice[v].tremolo_volume = (float)
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170 (1.0 - FSCALENEG((sine(song->voice[v].tremolo_phase >> RATE_SHIFT) + 1.0)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
171 * depth * TREMOLO_AMPLITUDE_TUNING,
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 17));
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
173
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
174 /* I'm not sure about the +1.0 there -- it makes tremoloed voices'
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
175 volumes on average the lower the higher the tremolo amplitude. */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
177
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 /* Returns 1 if the note died */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 static int update_signal(MidiSong *song, int v)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181 if (song->voice[v].envelope_increment && update_envelope(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182 return 1;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184 if (song->voice[v].tremolo_phase_increment)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185 update_tremolo(song, v);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187 apply_envelope_to_amp(song, v);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
188 return 0;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191 #define MIXATION(a) *lp++ += (a)*s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193 static void mix_mystery_signal(MidiSong *song, sample_t *sp, Sint32 *lp, int v,
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194 int count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196 Voice *vp = song->voice + v;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
197 final_volume_t
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 left=vp->left_mix,
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 right=vp->right_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 int cc;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201 sample_t s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
202
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 if (!(cc = vp->control_counter))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
205 cc = song->control_ratio;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206 if (update_signal(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
207 return; /* Envelope ran out */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
208 left = vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
209 right = vp->right_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
210 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212 while (count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
213 if (cc < count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
214 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215 count -= cc;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
216 while (cc--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
219 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
220 MIXATION(right);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
221 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
222 cc = song->control_ratio;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
223 if (update_signal(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 return; /* Envelope ran out */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225 left = vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
226 right = vp->right_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
227 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230 vp->control_counter = cc - count;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
231 while (count--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 MIXATION(right);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
237 return;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
239 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
240
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241 static void mix_center_signal(MidiSong *song, sample_t *sp, Sint32 *lp, int v,
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
242 int count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 Voice *vp = song->voice + v;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
245 final_volume_t
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
246 left=vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
247 int cc;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
248 sample_t s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
249
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250 if (!(cc = vp->control_counter))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
251 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
252 cc = song->control_ratio;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253 if (update_signal(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
254 return; /* Envelope ran out */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
255 left = vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 while (count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 if (cc < count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
260 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261 count -= cc;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 while (cc--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 cc = song->control_ratio;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 if (update_signal(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
270 return; /* Envelope ran out */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 left = vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275 vp->control_counter = cc - count;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276 while (count--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
279 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 return;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286 static void mix_single_signal(MidiSong *song, sample_t *sp, Sint32 *lp, int v,
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 int count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 Voice *vp = song->voice + v;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290 final_volume_t
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
291 left=vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292 int cc;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 sample_t s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 if (!(cc = vp->control_counter))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
296 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
297 cc = song->control_ratio;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
298 if (update_signal(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
299 return; /* Envelope ran out */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
300 left = vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
301 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
302
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
303 while (count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
304 if (cc < count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
305 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
306 count -= cc;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
307 while (cc--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
308 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
309 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
310 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
311 lp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
312 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
313 cc = song->control_ratio;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
314 if (update_signal(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
315 return; /* Envelope ran out */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
316 left = vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
317 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
318 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
319 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
320 vp->control_counter = cc - count;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
321 while (count--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
322 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
324 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
325 lp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
326 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
327 return;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
328 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
329 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
330
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
331 static void mix_mono_signal(MidiSong *song, sample_t *sp, Sint32 *lp, int v,
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
332 int count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
333 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
334 Voice *vp = song->voice + v;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
335 final_volume_t
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
336 left=vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
337 int cc;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
338 sample_t s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
339
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
340 if (!(cc = vp->control_counter))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
341 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
342 cc = song->control_ratio;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
343 if (update_signal(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
344 return; /* Envelope ran out */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
345 left = vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
346 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
347
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
348 while (count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
349 if (cc < count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
351 count -= cc;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
352 while (cc--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
353 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
354 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
355 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
356 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
357 cc = song->control_ratio;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
358 if (update_signal(song, v))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
359 return; /* Envelope ran out */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
360 left = vp->left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
361 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
362 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
363 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
364 vp->control_counter = cc - count;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
365 while (count--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
366 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
367 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
368 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
369 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
370 return;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
371 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
372 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
373
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
374 static void mix_mystery(MidiSong *song, sample_t *sp, Sint32 *lp, int v, int count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
375 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
376 final_volume_t
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
377 left = song->voice[v].left_mix,
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
378 right = song->voice[v].right_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
379 sample_t s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
380
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
381 while (count--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
382 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
383 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
384 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
385 MIXATION(right);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
386 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
387 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
388
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
389 static void mix_center(MidiSong *song, sample_t *sp, Sint32 *lp, int v, int count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
390 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
391 final_volume_t
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
392 left = song->voice[v].left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
393 sample_t s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
394
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
395 while (count--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
396 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
397 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
398 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
399 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
400 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
401 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
402
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
403 static void mix_single(MidiSong *song, sample_t *sp, Sint32 *lp, int v, int count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
404 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
405 final_volume_t
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
406 left = song->voice[v].left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
407 sample_t s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
408
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
409 while (count--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
410 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
411 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
412 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
413 lp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
414 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
415 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
416
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
417 static void mix_mono(MidiSong *song, sample_t *sp, Sint32 *lp, int v, int count)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
418 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
419 final_volume_t
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
420 left = song->voice[v].left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
421 sample_t s;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
422
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
423 while (count--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
424 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
425 s = *sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
426 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
427 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
428 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
429
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
430 /* Ramp a note out in c samples */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
431 static void ramp_out(MidiSong *song, sample_t *sp, Sint32 *lp, int v, Sint32 c)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
432 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
433
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
434 /* should be final_volume_t, but Uint8 gives trouble. */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
435 Sint32 left, right, li, ri;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
436
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
437 sample_t s=0; /* silly warning about uninitialized s */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
438
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
439 /* Fix by James Caldwell */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
440 if ( c == 0 ) c = 1;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
441
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
442 left=song->voice[v].left_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
443 li=-(left/c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
444 if (!li) li=-1;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
445
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
446 /* printf("Ramping out: left=%d, c=%d, li=%d\n", left, c, li); */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
447
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
448 if (!(song->encoding & PE_MONO))
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
449 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
450 if (song->voice[v].panned==PANNED_MYSTERY)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
451 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
452 right=song->voice[v].right_mix;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
453 ri=-(right/c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
454 while (c--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
455 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
456 left += li;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
457 if (left<0)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
458 left=0;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
459 right += ri;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
460 if (right<0)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
461 right=0;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
462 s=*sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
463 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
464 MIXATION(right);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
465 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
466 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
467 else if (song->voice[v].panned==PANNED_CENTER)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
468 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
469 while (c--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
470 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
471 left += li;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
472 if (left<0)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
473 return;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
474 s=*sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
475 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
476 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
477 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
478 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
479 else if (song->voice[v].panned==PANNED_LEFT)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
480 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
481 while (c--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
482 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
483 left += li;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
484 if (left<0)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
485 return;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
486 s=*sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
487 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
488 lp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
489 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
490 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
491 else if (song->voice[v].panned==PANNED_RIGHT)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
492 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
493 while (c--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
494 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
495 left += li;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
496 if (left<0)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
497 return;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
498 s=*sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
499 lp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
500 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
501 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
502 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
503 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
504 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
505 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
506 /* Mono output. */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
507 while (c--)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
508 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
509 left += li;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
510 if (left<0)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
511 return;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
512 s=*sp++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
513 MIXATION(left);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
514 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
515 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
516 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
517
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
518
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
519 /**************** interface function ******************/
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
520
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
521 void mix_voice(MidiSong *song, Sint32 *buf, int v, Sint32 c)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
522 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
523 Voice *vp = song->voice + v;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
524 sample_t *sp;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
525 if (vp->status==VOICE_DIE)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
526 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
527 if (c>=MAX_DIE_TIME)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
528 c=MAX_DIE_TIME;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
529 sp=resample_voice(song, v, &c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
530 ramp_out(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
531 vp->status=VOICE_FREE;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
532 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
533 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
534 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
535 sp=resample_voice(song, v, &c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
536 if (song->encoding & PE_MONO)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
537 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
538 /* Mono output. */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
539 if (vp->envelope_increment || vp->tremolo_phase_increment)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
540 mix_mono_signal(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
541 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
542 mix_mono(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
543 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
544 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
545 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
546 if (vp->panned == PANNED_MYSTERY)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
547 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
548 if (vp->envelope_increment || vp->tremolo_phase_increment)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
549 mix_mystery_signal(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
550 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
551 mix_mystery(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
552 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
553 else if (vp->panned == PANNED_CENTER)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
554 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
555 if (vp->envelope_increment || vp->tremolo_phase_increment)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
556 mix_center_signal(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
557 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
558 mix_center(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
559 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
560 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
561 {
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
562 /* It's either full left or full right. In either case,
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
563 every other sample is 0. Just get the offset right: */
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
564 if (vp->panned == PANNED_RIGHT) buf++;
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
565
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
566 if (vp->envelope_increment || vp->tremolo_phase_increment)
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
567 mix_single_signal(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
568 else
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
569 mix_single(song, sp, buf, v, c);
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
570 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
571 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
572 }
2d887640d300 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
573 }