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 "config.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 "aubio_priv.h" |
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26 | #include "fvec.h" |
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27 | #include "fmat.h" |
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28 | #include "io/source.h" |
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29 | #include "effects/timestretch.h" |
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30 | |
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31 | #include "rubberband/rubberband-c.h" |
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32 | |
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33 | #define MIN_STRETCH_RATIO 0.025 |
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34 | #define MAX_STRETCH_RATIO 40. |
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35 | |
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36 | #define HAVE_THREADS 1 |
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37 | #if 0 |
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38 | #undef HAVE_THREADS |
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39 | #endif |
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40 | |
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41 | #ifdef HAVE_THREADS |
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42 | #include <pthread.h> |
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43 | #endif |
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44 | |
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45 | /** generic time stretching structure */ |
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46 | struct _aubio_timestretch_t |
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47 | { |
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48 | uint_t samplerate; /**< samplerate */ |
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49 | uint_t hopsize; /**< hop size */ |
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50 | smpl_t stretchratio; /**< time ratio */ |
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51 | smpl_t pitchscale; /**< pitch scale */ |
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52 | |
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53 | aubio_source_t *source; |
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54 | uint_t source_hopsize; /**< hop size at which the source is read */ |
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55 | fvec_t *in; |
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56 | uint_t eof; |
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57 | |
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58 | RubberBandState rb; |
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59 | RubberBandOptions rboptions; |
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60 | |
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61 | #ifdef HAVE_THREADS |
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62 | pthread_t read_thread; |
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63 | pthread_mutex_t read_mutex; |
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64 | pthread_cond_t read_avail; |
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65 | pthread_cond_t read_request; |
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66 | sint_t available; |
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67 | uint_t started; |
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68 | uint_t finish; |
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69 | #endif |
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70 | }; |
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71 | |
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72 | extern RubberBandOptions aubio_get_rubberband_opts(const char_t *mode); |
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73 | |
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74 | static void aubio_timestretch_warmup (aubio_timestretch_t * p); |
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75 | static sint_t aubio_timestretch_fetch(aubio_timestretch_t *p, uint_t fetch); |
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76 | #ifdef HAVE_THREADS |
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77 | static void *aubio_timestretch_readfn(void *p); |
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78 | #endif |
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79 | |
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80 | aubio_timestretch_t * |
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81 | new_aubio_timestretch (const char_t * uri, const char_t * mode, |
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82 | smpl_t stretchratio, uint_t hopsize, uint_t samplerate) |
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83 | { |
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84 | aubio_timestretch_t *p = AUBIO_NEW (aubio_timestretch_t); |
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85 | p->samplerate = samplerate; |
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86 | p->hopsize = hopsize; |
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87 | //p->source_hopsize = 2048; |
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88 | p->source_hopsize = hopsize; |
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89 | p->pitchscale = 1.; |
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90 | p->eof = 0; |
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91 | |
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92 | p->source = new_aubio_source(uri, samplerate, p->source_hopsize); |
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93 | if (!p->source) goto beach; |
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94 | if (samplerate == 0 ) p->samplerate = aubio_source_get_samplerate(p->source); |
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95 | |
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96 | p->in = new_fvec(p->source_hopsize); |
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97 | |
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98 | if (stretchratio <= MAX_STRETCH_RATIO && stretchratio >= MIN_STRETCH_RATIO) { |
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99 | p->stretchratio = stretchratio; |
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100 | } else { |
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101 | AUBIO_ERR("timestretch: stretchratio should be in the range [%.3f, %.3f], got %f\n", |
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102 | MIN_STRETCH_RATIO, MAX_STRETCH_RATIO, stretchratio); |
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103 | goto beach; |
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104 | } |
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105 | |
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106 | p->rboptions = aubio_get_rubberband_opts(mode); |
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107 | if (p->rboptions < 0) { |
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108 | AUBIO_ERR("timestretch: unknown time stretching method %s\n", mode); |
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109 | goto beach; |
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110 | } |
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111 | |
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112 | p->rb = rubberband_new(p->samplerate, 1, p->rboptions, p->stretchratio, p->pitchscale); |
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113 | rubberband_set_max_process_size(p->rb, p->source_hopsize); |
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114 | //rubberband_set_debug_level(p->rb, 10); |
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115 | |
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116 | #ifdef HAVE_THREADS |
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117 | p->started = 0; |
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118 | p->finish = 0; |
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119 | pthread_mutex_init(&p->read_mutex, 0); |
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120 | pthread_cond_init (&p->read_avail, 0); |
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121 | pthread_cond_init (&p->read_request, 0); |
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122 | //AUBIO_WRN("timestretch: creating thread\n"); |
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123 | pthread_create(&p->read_thread, 0, aubio_timestretch_readfn, p); |
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124 | //AUBIO_DBG("timestretch: new_ waiting for warmup, got %d available\n", p->available); |
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125 | pthread_mutex_lock(&p->read_mutex); |
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126 | pthread_cond_wait(&p->read_avail, &p->read_mutex); |
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127 | pthread_mutex_unlock(&p->read_mutex); |
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128 | //AUBIO_DBG("timestretch: new_ warm up success, got %d available\n", p->available); |
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129 | #else |
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130 | aubio_timestretch_warmup(p); |
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131 | #endif |
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132 | |
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133 | return p; |
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134 | |
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135 | beach: |
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136 | del_aubio_timestretch(p); |
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137 | return NULL; |
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138 | } |
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139 | |
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140 | #ifdef HAVE_THREADS |
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141 | void * |
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142 | aubio_timestretch_readfn(void *z) |
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143 | { |
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144 | aubio_timestretch_t *p = z; |
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145 | while(1) { //p->available < (int)p->hopsize && p->eof != 1) { |
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146 | //AUBIO_WRN("timestretch: locking in readfn\n"); |
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147 | pthread_mutex_lock(&p->read_mutex); |
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148 | if (!p->started && !p->eof) { |
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149 | // fetch the first few samples and mark as started |
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150 | //AUBIO_WRN("timestretch: fetching first samples\n"); |
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151 | aubio_timestretch_warmup(p); |
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152 | p->started = 1; |
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153 | } else if (!p->eof) { |
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154 | // fetch at least p->hopsize stretched samples |
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155 | p->available = aubio_timestretch_fetch(p, p->hopsize); |
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156 | // signal available frames |
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157 | pthread_cond_signal(&p->read_avail); |
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158 | if (p->eof != 1) { |
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159 | // the end of file was not reached yet, wait for the next read_request |
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160 | pthread_cond_wait(&p->read_request, &p->read_mutex); |
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161 | } else { |
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162 | // eof was reached, do not wait for a read request and mark as stopped |
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163 | p->started = 0; |
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164 | } |
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165 | } else { |
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166 | //pthread_cond_signal(&p->read_avail); |
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167 | pthread_cond_wait(&p->read_request, &p->read_mutex); |
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168 | //AUBIO_WRN("timestretch: finished idle in readfn\n"); |
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169 | if (p->finish) pthread_exit(NULL); |
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170 | } |
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171 | //AUBIO_WRN("timestretch: unlocking in readfn\n"); |
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172 | pthread_mutex_unlock(&p->read_mutex); |
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173 | } |
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174 | //AUBIO_WRN("timestretch: exiting readfn\n"); |
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175 | pthread_exit(NULL); |
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176 | } |
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177 | #endif |
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178 | |
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179 | static void |
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180 | aubio_timestretch_warmup (aubio_timestretch_t * p) |
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181 | { |
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182 | // warm up rubber band |
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183 | unsigned int latency = MAX(p->hopsize, rubberband_get_latency(p->rb)); |
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184 | #ifdef HAVE_THREADS |
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185 | p->available = aubio_timestretch_fetch(p, latency); |
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186 | #else |
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187 | aubio_timestretch_fetch(p, latency); |
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188 | #endif |
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189 | } |
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190 | |
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191 | void |
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192 | del_aubio_timestretch (aubio_timestretch_t * p) |
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193 | { |
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194 | #ifdef HAVE_THREADS |
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195 | void *threadfn; |
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196 | //AUBIO_WRN("timestretch: entering delete\n"); |
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197 | pthread_mutex_lock(&p->read_mutex); |
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198 | p->finish = 1; |
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199 | pthread_cond_signal(&p->read_request); |
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200 | //pthread_cond_wait(&p->read_avail, &p->read_mutex); |
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201 | pthread_mutex_unlock(&p->read_mutex); |
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202 | if ((p->eof == 0) && (pthread_cancel(p->read_thread))) { |
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203 | AUBIO_WRN("timestretch: cancelling thread failed\n"); |
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204 | } |
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205 | if (pthread_join(p->read_thread, &threadfn)) { |
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206 | AUBIO_WRN("timestretch: joining thread failed\n"); |
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207 | } |
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208 | pthread_mutex_destroy(&p->read_mutex); |
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209 | pthread_cond_destroy(&p->read_avail); |
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210 | pthread_cond_destroy(&p->read_request); |
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211 | #endif |
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212 | if (p->in) del_fvec(p->in); |
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213 | if (p->source) del_aubio_source(p->source); |
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214 | if (p->rb) { |
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215 | rubberband_delete(p->rb); |
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216 | } |
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217 | AUBIO_FREE (p); |
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218 | } |
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219 | |
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220 | uint_t |
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221 | aubio_timestretch_get_samplerate (aubio_timestretch_t * p) |
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222 | { |
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223 | return p->samplerate; |
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224 | } |
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225 | |
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226 | uint_t aubio_timestretch_get_latency (aubio_timestretch_t * p) { |
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227 | return rubberband_get_latency(p->rb); |
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228 | } |
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229 | |
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230 | uint_t |
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231 | aubio_timestretch_set_stretch (aubio_timestretch_t * p, smpl_t stretch) |
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232 | { |
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233 | if (stretch >= MIN_STRETCH_RATIO && stretch <= MAX_STRETCH_RATIO) { |
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234 | p->stretchratio = stretch; |
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235 | rubberband_set_time_ratio(p->rb, 1./p->stretchratio); |
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236 | return AUBIO_OK; |
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237 | } else { |
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238 | AUBIO_WRN("timestretch: could not set stretch ratio to %.2f\n", stretch); |
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239 | return AUBIO_FAIL; |
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240 | } |
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241 | } |
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242 | |
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243 | smpl_t |
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244 | aubio_timestretch_get_stretch (aubio_timestretch_t * p) |
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245 | { |
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246 | return p->stretchratio; |
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247 | } |
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248 | |
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249 | uint_t |
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250 | aubio_timestretch_set_pitchscale (aubio_timestretch_t * p, smpl_t pitchscale) |
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251 | { |
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252 | if (pitchscale >= 0.0625 && pitchscale <= 4.) { |
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253 | p->pitchscale = pitchscale; |
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254 | rubberband_set_pitch_scale(p->rb, p->pitchscale); |
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255 | return AUBIO_OK; |
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256 | } else { |
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257 | AUBIO_WRN("timestretch: could not set pitchscale to %.2f\n", pitchscale); |
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258 | return AUBIO_FAIL; |
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259 | } |
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260 | } |
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261 | |
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262 | smpl_t |
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263 | aubio_timestretch_get_pitchscale (aubio_timestretch_t * p) |
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264 | { |
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265 | return p->pitchscale; |
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266 | } |
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267 | |
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268 | uint_t |
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269 | aubio_timestretch_set_transpose(aubio_timestretch_t * p, smpl_t transpose) |
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270 | { |
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271 | if (transpose >= -24. && transpose <= 24.) { |
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272 | smpl_t pitchscale = POW(2., transpose / 12.); |
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273 | return aubio_timestretch_set_pitchscale(p, pitchscale); |
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274 | } else { |
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275 | AUBIO_WRN("timestretch: could not set transpose to %.2f\n", transpose); |
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276 | return AUBIO_FAIL; |
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277 | } |
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278 | } |
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279 | |
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280 | smpl_t |
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281 | aubio_timestretch_get_transpose(aubio_timestretch_t * p) |
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282 | { |
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283 | return 12. * LOG(p->pitchscale) / LOG(2.0); |
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284 | } |
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285 | |
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286 | sint_t |
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287 | aubio_timestretch_fetch(aubio_timestretch_t *p, uint_t length) |
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288 | { |
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289 | uint_t source_read = p->source_hopsize; |
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290 | // read more samples from source until we have enough available or eof is reached |
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291 | int available = rubberband_available(p->rb); |
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292 | while ((available < (int)length) && (p->eof == 0)) { |
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293 | aubio_source_do(p->source, p->in, &source_read); |
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294 | if (source_read < p->source_hopsize) { |
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295 | p->eof = 1; |
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296 | } |
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297 | rubberband_process(p->rb, (const float* const*)&(p->in->data), source_read, p->eof); |
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298 | available = rubberband_available(p->rb); |
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299 | } |
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300 | return available; |
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301 | } |
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302 | |
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303 | void |
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304 | aubio_timestretch_do (aubio_timestretch_t * p, fvec_t * out, uint_t * read) |
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305 | { |
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306 | #ifndef HAVE_THREADS |
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307 | int available = aubio_timestretch_fetch(p, p->hopsize); |
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308 | #else /* HAVE_THREADS */ |
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309 | int available; |
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310 | pthread_mutex_lock(&p->read_mutex); |
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311 | if (p->eof != 1) { |
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312 | // signal a read request |
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313 | pthread_cond_signal(&p->read_request); |
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314 | // wait for an available signal |
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315 | pthread_cond_wait(&p->read_avail, &p->read_mutex); |
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316 | } else { |
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317 | available = rubberband_available(p->rb); |
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318 | } |
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319 | #endif /* HAVE_THREADS */ |
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320 | // now retrieve the samples and write them into out->data |
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321 | if (available >= (int)p->hopsize) { |
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322 | rubberband_retrieve(p->rb, (float* const*)&(out->data), p->hopsize); |
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323 | *read = p->hopsize; |
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324 | } else if (available > 0) { |
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325 | rubberband_retrieve(p->rb, (float* const*)&(out->data), available); |
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326 | *read = available; |
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327 | } else { |
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328 | fvec_zeros(out); |
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329 | *read = 0; |
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330 | } |
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331 | #ifdef HAVE_THREADS |
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332 | pthread_mutex_unlock(&p->read_mutex); |
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333 | #endif |
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334 | } |
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335 | |
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336 | uint_t |
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337 | aubio_timestretch_seek (aubio_timestretch_t *p, uint_t pos) |
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338 | { |
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339 | uint_t err = AUBIO_OK; |
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340 | #if HAVE_THREADS |
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341 | pthread_mutex_lock(&p->read_mutex); |
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342 | #endif |
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343 | p->eof = 0; |
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344 | rubberband_reset(p->rb); |
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345 | err = aubio_source_seek(p->source, pos); |
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346 | #if HAVE_THREADS |
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347 | p->available = 0; |
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348 | p->started = 1; |
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349 | pthread_mutex_unlock(&p->read_mutex); |
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350 | #endif |
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351 | return err; |
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352 | } |
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353 | |
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354 | #endif |
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