1 | /* |
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2 | Copyright (C) 2016 Paul Brossier <piem@aubio.org> |
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3 | |
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4 | This file is part of aubio. |
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5 | |
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6 | aubio is free software: you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation, either version 3 of the License, or |
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9 | (at your option) any later version. |
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10 | |
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11 | aubio is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with aubio. If not, see <http://www.gnu.org/licenses/>. |
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18 | |
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19 | */ |
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20 | |
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21 | #include "aubio_priv.h" |
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22 | |
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23 | #ifdef HAVE_RUBBERBAND |
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24 | |
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25 | #include "fvec.h" |
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26 | #include "fmat.h" |
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27 | #include "io/source.h" |
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28 | #include "effects/timestretch.h" |
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29 | |
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30 | #include <rubberband/rubberband-c.h> |
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31 | |
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32 | #define MIN_STRETCH_RATIO 0.025 |
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33 | #define MAX_STRETCH_RATIO 40. |
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34 | |
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35 | #define HAVE_THREADS 1 |
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36 | #if 0 |
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37 | #undef HAVE_THREADS |
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38 | #endif |
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39 | |
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40 | #ifdef HAVE_THREADS |
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41 | #include <pthread.h> |
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42 | #endif |
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43 | |
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44 | /** generic time stretching structure */ |
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45 | struct _aubio_timestretch_t |
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46 | { |
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47 | uint_t samplerate; /**< samplerate */ |
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48 | uint_t hopsize; /**< hop size */ |
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49 | smpl_t stretchratio; /**< time ratio */ |
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50 | smpl_t pitchscale; /**< pitch scale */ |
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51 | |
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52 | RubberBandState rb; |
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53 | RubberBandOptions rboptions; |
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54 | }; |
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55 | |
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56 | extern RubberBandOptions aubio_get_rubberband_opts(const char_t *mode); |
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57 | |
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58 | static void aubio_timestretch_warmup (aubio_timestretch_t * p); |
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59 | |
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60 | aubio_timestretch_t * |
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61 | new_aubio_timestretch (const char_t * mode, smpl_t stretchratio, uint_t hopsize, |
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62 | uint_t samplerate) |
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63 | { |
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64 | aubio_timestretch_t *p = AUBIO_NEW (aubio_timestretch_t); |
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65 | p->hopsize = hopsize; |
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66 | p->pitchscale = 1.; |
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67 | |
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68 | if ((sint_t)hopsize <= 0) { |
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69 | AUBIO_ERR("timestretch: hopsize should be > 0, got %d\n", hopsize); |
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70 | goto beach; |
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71 | } |
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72 | |
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73 | if ((sint_t)samplerate <= 0) { |
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74 | AUBIO_ERR("timestretch: samplerate should be > 0, got %d\n", samplerate); |
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75 | goto beach; |
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76 | } |
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77 | |
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78 | if (stretchratio <= MAX_STRETCH_RATIO && stretchratio >= MIN_STRETCH_RATIO) { |
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79 | p->stretchratio = stretchratio; |
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80 | } else { |
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81 | AUBIO_ERR("timestretch: stretchratio should be in the range [%.3f, %.3f], got %f\n", |
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82 | MIN_STRETCH_RATIO, MAX_STRETCH_RATIO, stretchratio); |
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83 | goto beach; |
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84 | } |
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85 | |
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86 | p->rboptions = aubio_get_rubberband_opts(mode); |
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87 | if (p->rboptions < 0) { |
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88 | AUBIO_ERR("timestretch: unknown time stretching method %s\n", mode); |
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89 | goto beach; |
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90 | } |
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91 | |
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92 | p->rb = rubberband_new(samplerate, 1, p->rboptions, p->stretchratio, p->pitchscale); |
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93 | if (!p->rb) goto beach; |
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94 | |
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95 | p->samplerate = samplerate; |
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96 | |
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97 | //aubio_timestretch_warmup(p); |
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98 | |
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99 | return p; |
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100 | |
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101 | beach: |
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102 | del_aubio_timestretch(p); |
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103 | return NULL; |
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104 | } |
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105 | |
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106 | static void |
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107 | aubio_timestretch_warmup (aubio_timestretch_t * p) |
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108 | { |
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109 | // warm up rubber band |
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110 | //AUBIO_WRN("timestretch: warming-up\n"); |
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111 | unsigned int latency = MAX(p->hopsize, rubberband_get_latency(p->rb)); |
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112 | fvec_t *input = new_fvec(p->hopsize); |
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113 | while (aubio_timestretch_push(p, input, input->length) < (int)latency) { |
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114 | //sint_t available = aubio_timestretch_get_available(p); |
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115 | //AUBIO_WRN("timestretch: warmup got %d, latency: %d\n", available, latency); |
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116 | } |
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117 | del_fvec(input); |
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118 | } |
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119 | |
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120 | void |
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121 | del_aubio_timestretch (aubio_timestretch_t * p) |
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122 | { |
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123 | if (p->rb) { |
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124 | rubberband_delete(p->rb); |
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125 | } |
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126 | AUBIO_FREE (p); |
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127 | } |
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128 | |
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129 | uint_t |
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130 | aubio_timestretch_get_samplerate (aubio_timestretch_t * p) |
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131 | { |
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132 | return p->samplerate; |
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133 | } |
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134 | |
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135 | uint_t aubio_timestretch_get_latency (aubio_timestretch_t * p) { |
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136 | return rubberband_get_latency(p->rb); |
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137 | } |
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138 | |
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139 | uint_t |
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140 | aubio_timestretch_set_stretch (aubio_timestretch_t * p, smpl_t stretch) |
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141 | { |
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142 | if (!p->rb) { |
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143 | AUBIO_ERR("timestretch: could not set stretch ratio," |
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144 | " rubberband not created\n"); |
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145 | return AUBIO_FAIL; |
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146 | } |
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147 | if (stretch >= MIN_STRETCH_RATIO && stretch <= MAX_STRETCH_RATIO) { |
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148 | p->stretchratio = stretch; |
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149 | rubberband_set_time_ratio(p->rb, 1./p->stretchratio); |
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150 | return AUBIO_OK; |
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151 | } else { |
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152 | AUBIO_ERR("timestretch: could not set stretch ratio to '%f'," |
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153 | " should be in the range [%.2f, %.2f].\n", stretch, |
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154 | MIN_STRETCH_RATIO, MAX_STRETCH_RATIO); |
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155 | return AUBIO_FAIL; |
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156 | } |
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157 | } |
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158 | |
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159 | smpl_t |
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160 | aubio_timestretch_get_stretch (aubio_timestretch_t * p) |
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161 | { |
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162 | return p->stretchratio; |
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163 | } |
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164 | |
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165 | uint_t |
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166 | aubio_timestretch_set_pitchscale (aubio_timestretch_t * p, smpl_t pitchscale) |
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167 | { |
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168 | if (!p->rb) { |
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169 | AUBIO_ERR("timestretch: could not set pitch scale," |
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170 | " rubberband not created\n"); |
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171 | return AUBIO_FAIL; |
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172 | } |
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173 | if (pitchscale >= 0.0625 && pitchscale <= 4.) { |
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174 | p->pitchscale = pitchscale; |
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175 | rubberband_set_pitch_scale(p->rb, p->pitchscale); |
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176 | return AUBIO_OK; |
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177 | } else { |
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178 | AUBIO_ERR("timestretch: could not set pitchscale to '%f'," |
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179 | " should be in the range [0.0625, 4.].\n", pitchscale); |
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180 | return AUBIO_FAIL; |
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181 | } |
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182 | } |
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183 | |
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184 | smpl_t |
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185 | aubio_timestretch_get_pitchscale (aubio_timestretch_t * p) |
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186 | { |
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187 | return p->pitchscale; |
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188 | } |
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189 | |
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190 | uint_t |
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191 | aubio_timestretch_set_transpose(aubio_timestretch_t * p, smpl_t transpose) |
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192 | { |
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193 | if (transpose >= -24. && transpose <= 24.) { |
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194 | smpl_t pitchscale = POW(2., transpose / 12.); |
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195 | return aubio_timestretch_set_pitchscale(p, pitchscale); |
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196 | } else { |
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197 | AUBIO_ERR("timestretch: could not set transpose to '%f'," |
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198 | " should be in the range [-24; 24].\n", transpose); |
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199 | return AUBIO_FAIL; |
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200 | } |
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201 | } |
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202 | |
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203 | smpl_t |
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204 | aubio_timestretch_get_transpose(aubio_timestretch_t * p) |
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205 | { |
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206 | return 12. * LOG(p->pitchscale) / LOG(2.0); |
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207 | } |
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208 | |
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209 | sint_t |
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210 | aubio_timestretch_push(aubio_timestretch_t *p, fvec_t *input, uint_t length) |
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211 | { |
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212 | // push new samples to rubberband, return available |
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213 | int available; |
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214 | int eof = (input->length != length) ? 1 : 0; |
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215 | rubberband_process(p->rb, (const float* const*)&(input->data), length, eof); |
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216 | available = rubberband_available(p->rb); |
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217 | //AUBIO_WRN("timestretch: processed %d, %d available, eof: %d\n", |
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218 | // length, available, eof); |
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219 | return available; |
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220 | } |
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221 | |
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222 | sint_t |
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223 | aubio_timestretch_get_available(aubio_timestretch_t *p) { |
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224 | return rubberband_available(p->rb); |
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225 | } |
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226 | |
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227 | void |
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228 | aubio_timestretch_do(aubio_timestretch_t * p, fvec_t * out, uint_t * read) |
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229 | { |
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230 | // now retrieve the samples and write them into out->data |
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231 | int available = rubberband_available(p->rb); |
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232 | if (available >= (int)out->length) { |
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233 | rubberband_retrieve(p->rb, (float* const*)&(out->data), out->length); |
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234 | *read = out->length; |
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235 | } else if (available > 0) { |
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236 | // this occurs each time the end of file is reached |
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237 | //AUBIO_WRN("timestretch: short read\n"); |
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238 | rubberband_retrieve(p->rb, (float* const*)&(out->data), available); |
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239 | fvec_t zeros; zeros.length = out->length - available; zeros.data = out->data + available; |
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240 | fvec_zeros(&zeros); |
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241 | *read = available; |
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242 | } else { |
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243 | // this may occur if the previous was a short read available == hopsize |
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244 | fvec_zeros(out); |
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245 | *read = 0; |
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246 | } |
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247 | } |
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248 | |
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249 | uint_t |
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250 | aubio_timestretch_reset(aubio_timestretch_t *p) |
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251 | { |
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252 | uint_t err = AUBIO_OK; |
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253 | if (p->rb) { |
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254 | rubberband_reset(p->rb); |
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255 | } |
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256 | return err; |
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257 | } |
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258 | |
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259 | #endif |
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