1 | //beep.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2012 |
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5 | * |
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6 | * This file is part of roard a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * RoarAudio is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | */ |
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25 | |
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26 | #include "roard.h" |
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27 | |
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28 | // TODO: FIXME: can all this VIO stuff be replaced by one call to stream_add_buffer()? |
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29 | |
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30 | // TODO: FIXME: move them out of here into libroar: |
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31 | static ssize_t beep_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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32 | struct roar_buffer * rbuf; |
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33 | |
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34 | ROAR_DBG("beep_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned int)count); |
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35 | |
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36 | if ( vio->inst == NULL ) |
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37 | return 0; |
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38 | |
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39 | rbuf = vio->inst; |
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40 | |
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41 | if ( roar_buffer_shift_out(&rbuf, buf, &count) == -1 ) |
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42 | return -1; |
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43 | |
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44 | vio->inst = rbuf; |
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45 | |
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46 | return count; |
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47 | } |
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48 | |
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49 | static int beep_close (struct roar_vio_calls * vio) { |
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50 | ROAR_DBG("beep_close(vio=%p) = ?", vio); |
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51 | |
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52 | if ( vio->inst != NULL ) |
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53 | roar_buffer_free(vio->inst); |
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54 | |
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55 | ROAR_DBG("beep_close(vio=%p) = 0", vio); |
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56 | return 0; |
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57 | } |
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58 | |
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59 | static void beep_init_vio (struct roar_vio_calls * vio, void * inst) { |
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60 | ROAR_DBG("beep_init_vio(vio=%p, inst=%p) = ?", vio, inst); |
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61 | |
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62 | memset(vio, 0, sizeof(struct roar_vio_calls)); |
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63 | |
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64 | vio->inst = inst; |
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65 | vio->read = beep_read; |
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66 | vio->close = beep_close; |
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67 | |
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68 | ROAR_DBG("beep_init_vio(vio=%p, inst=%p) = (void)", vio, inst); |
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69 | } |
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70 | |
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71 | struct roar_buffer * beep_fill_buffer (struct roar_beep * beep, struct roar_audio_info * info) { |
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72 | struct roar_buffer * buf; |
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73 | size_t frames = beep->time * info->rate / 1000; |
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74 | size_t samples = frames * info->channels; |
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75 | size_t mod = info->rate / beep->freq; |
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76 | char * data; |
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77 | void * bufdata; |
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78 | char val; |
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79 | size_t pos; |
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80 | size_t chan; |
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81 | |
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82 | ROAR_DBG("beep_fill_buffer(beep=%p, info=%p) = ?", beep, info); |
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83 | |
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84 | if ( roar_buffer_new_data(&buf, samples, &bufdata) == -1 ) { |
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85 | ROAR_DBG("beep_fill_buffer(beep=%p, info=%p) = NULL", beep, info); |
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86 | return NULL; |
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87 | } |
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88 | |
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89 | data = (char*)bufdata; |
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90 | |
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91 | for (pos = 0; pos < frames; pos++) { |
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92 | val = (pos % mod) < mod/2 ? -128 : 127; |
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93 | for (chan = 0; chan < info->channels; chan++) |
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94 | data[pos*info->channels + chan] = val; |
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95 | } |
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96 | |
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97 | ROAR_DBG("beep_fill_buffer(beep=%p, info=%p) = %p", beep, info, buf); |
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98 | return buf; |
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99 | } |
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100 | |
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101 | int beep_start (int client, struct roar_beep * beep) { |
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102 | struct roar_stream_server * ss; |
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103 | struct roar_stream * s; |
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104 | struct roar_buffer * buf; |
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105 | int stream; |
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106 | |
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107 | ROAR_DBG("beep_start(client=%i, beep=%p) = ?", client, beep); |
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108 | |
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109 | if ( beep->vol == 0 ) |
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110 | beep->vol = ROAR_BEEP_DEFAULT_VOL; |
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111 | |
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112 | if ( beep->time == 0 ) |
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113 | beep->time = ROAR_BEEP_DEFAULT_TIME; |
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114 | |
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115 | if ( beep->freq == 0 ) |
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116 | beep->freq = ROAR_BEEP_DEFAULT_FREQ; |
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117 | |
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118 | if ( beep->type == 0 ) |
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119 | beep->type = ROAR_BEEP_DEFAULT_TYPE; |
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120 | |
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121 | // x, y, z location '0' is allready centered. |
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122 | |
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123 | // TODO: remove the following lions as soon as we support non zero values |
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124 | if ( beep->z != 0 ) |
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125 | return -1; |
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126 | |
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127 | if ( beep->y != 0 ) |
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128 | return -1; |
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129 | |
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130 | ROAR_DBG("beep_start(client=%i, beep=%p) = ?", client, beep); |
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131 | |
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132 | if ((stream = streams_new()) == -1 ) |
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133 | return -1; |
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134 | |
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135 | ROAR_DBG("beep_start(client=%i, beep=%p): stream=%i", client, beep, stream); |
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136 | |
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137 | if ( client_stream_add(client, stream) == -1 ) { |
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138 | streams_delete(stream); |
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139 | return -1; |
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140 | } |
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141 | |
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142 | if ( streams_set_name(stream, "Beep Source") == -1 ) { |
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143 | streams_delete(stream); |
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144 | return -1; |
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145 | } |
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146 | |
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147 | if ( streams_get(stream, &ss) == -1 ) { |
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148 | streams_delete(stream); |
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149 | return -1; |
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150 | } |
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151 | |
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152 | s = ROAR_STREAM(ss); |
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153 | |
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154 | memcpy(&(s->info), g_sa, sizeof(s->info)); |
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155 | |
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156 | s->info.channels = 2; |
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157 | s->info.bits = 8; |
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158 | |
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159 | ss->mixer.mixer[0] = beep->x > 0 ? |
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160 | ((long)beep->vol * ((long)ROAR_BEEP_MAX_POS - (long)beep->x)/(long)ROAR_BEEP_MAX_POS) : |
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161 | beep->vol; |
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162 | ss->mixer.mixer[1] = beep->x < 0 ? |
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163 | ((long)beep->vol * ((long)ROAR_BEEP_MAX_POS + (long)beep->x)/(long)ROAR_BEEP_MAX_POS) : |
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164 | beep->vol; |
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165 | ss->mixer.scale = ROAR_BEEP_MAX_VOL; |
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166 | |
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167 | ROAR_DBG("beep_start(client=%i, beep=%p): beep->x=%i, ss->mixer.mixer[] = {%u, %u}", client, beep, beep->x, ss->mixer.mixer[0], ss->mixer.mixer[1]); |
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168 | |
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169 | if ( streams_set_dir(stream, ROAR_DIR_PLAY, 1) == -1 ) { |
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170 | streams_delete(stream); |
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171 | return -1; |
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172 | } |
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173 | |
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174 | if ( streams_set_role(stream, ROAR_ROLE_BEEP) == -1 ) { |
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175 | streams_delete(stream); |
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176 | return -1; |
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177 | } |
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178 | |
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179 | if ( (buf = beep_fill_buffer(beep, &(s->info))) == NULL ) { |
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180 | streams_delete(stream); |
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181 | return -1; |
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182 | } |
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183 | |
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184 | ROAR_DBG("beep_start(client=%i, beep=%p): buf=%p", client, beep, buf); |
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185 | |
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186 | beep_init_vio(&(ss->vio), buf); |
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187 | |
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188 | if ( streams_set_fh(stream, -2) == -1 ) { |
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189 | streams_delete(stream); |
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190 | return -1; |
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191 | } |
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192 | |
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193 | ROAR_DBG("beep_start(client=%i, beep=%p) = %i", client, beep, stream); |
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194 | return stream; |
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195 | } |
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196 | |
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197 | //ll |
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