1 | //ctl_roar.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2012 |
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5 | * |
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6 | * This file is part of libroar 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 | * libroar 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 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | //#define DEBUG |
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37 | #include "roar.h" |
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38 | #include <string.h> |
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39 | |
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40 | #ifdef DEBUG |
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41 | static struct roar_vio_calls DEBUG_FH; |
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42 | #endif |
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43 | |
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44 | static void roar_plugin_close(snd_ctl_ext_t * ext) { |
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45 | struct roar_alsa_ctl * self = ext->private_data; |
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46 | |
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47 | roar_disconnect(&(self->roar.con)); |
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48 | free(self); |
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49 | } |
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50 | |
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51 | static int roar_plugin_elem_count(snd_ctl_ext_t *ext) { |
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52 | struct roar_alsa_ctl * self = ext->private_data; |
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53 | int ret = 0; |
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54 | |
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55 | for (; self->streams[ret].id != -1; ret++); |
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56 | |
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57 | return ret; |
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58 | } |
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59 | |
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60 | static int roar_plugin_elem_list(snd_ctl_ext_t *ext, unsigned int offset, snd_ctl_elem_id_t *id) { |
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61 | struct roar_alsa_ctl * self = ext->private_data; |
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62 | |
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63 | snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); |
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64 | snd_ctl_elem_id_set_name(id, self->streams[offset].name); |
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65 | |
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66 | return 0; |
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67 | } |
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68 | |
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69 | // ALSA is strange here, this function makes keys (stream ID) from non-unique stream names... |
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70 | static snd_ctl_ext_key_t roar_plugin_find_elem(snd_ctl_ext_t *ext, |
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71 | const snd_ctl_elem_id_t *id) { |
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72 | struct roar_alsa_ctl * self = ext->private_data; |
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73 | // int numid = snd_ctl_elem_id_get_numid(id); |
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74 | const char * name; |
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75 | int i; |
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76 | |
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77 | // ROAR_DBG("roar_plugin_find_elem(ext=%p, id=%p): numid=%i", ext, id, numid); |
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78 | |
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79 | // return self->streams[numid].id; |
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80 | |
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81 | name = snd_ctl_elem_id_get_name(id); |
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82 | |
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83 | for (i = 0; i < MAX_STREAMS; i++) { |
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84 | if ( !strcmp(self->streams[i].name, name) ) { |
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85 | return self->streams[i].id; |
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86 | } |
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87 | } |
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88 | |
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89 | return SND_CTL_EXT_KEY_NOT_FOUND; |
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90 | } |
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91 | |
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92 | static int roar_plugin_get_attribute(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, |
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93 | int *type, unsigned int *acc, unsigned int *count) { |
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94 | struct roar_alsa_ctl * self = ext->private_data; |
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95 | int i; |
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96 | |
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97 | *type = SND_CTL_ELEM_TYPE_INTEGER; |
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98 | *acc = SND_CTL_EXT_ACCESS_READWRITE; |
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99 | |
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100 | for (i = 0; i < MAX_STREAMS && self->streams[i].id != (int)key; i++) |
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101 | |
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102 | if ( i == MAX_STREAMS ) |
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103 | return -EIO; |
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104 | |
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105 | *count = self->streams[i].channels; |
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106 | |
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107 | return 0; |
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108 | } |
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109 | |
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110 | static int roar_plugin_get_integer_info(snd_ctl_ext_t *ext ATTRIBUTE_UNUSED, |
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111 | snd_ctl_ext_key_t key ATTRIBUTE_UNUSED, |
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112 | long *imin, long *imax, long *istep) { |
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113 | *istep = 0; |
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114 | *imin = 0; |
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115 | *imax = 65535; |
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116 | return 0; |
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117 | } |
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118 | |
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119 | static int roar_plugin_read_integer(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value) { |
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120 | struct roar_alsa_ctl * self = ext->private_data; |
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121 | struct roar_mixer_settings mixer; |
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122 | int channels; |
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123 | int i; |
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124 | |
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125 | for (i = 0; i < MAX_STREAMS && self->streams[i].id != (int)key; i++) |
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126 | |
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127 | if ( i == MAX_STREAMS ) |
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128 | return -EIO; |
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129 | |
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130 | roar_err_clear_all(); |
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131 | if ( roar_get_vol(&(self->roar.con), key, &mixer, &channels) == -1 ) { |
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132 | roar_err_update(); |
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133 | return -errno; |
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134 | } |
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135 | |
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136 | if ( channels != (int)self->streams[i].channels ) |
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137 | return -EIO; |
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138 | |
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139 | for (i = 0; i < channels; i++) |
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140 | value[i] = ((unsigned long int)mixer.mixer[i] * 65535LU) / mixer.scale; |
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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 int roar_plugin_write_integer(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value) { |
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146 | struct roar_alsa_ctl * self = ext->private_data; |
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147 | struct roar_mixer_settings mixer; |
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148 | int sid; |
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149 | int i; |
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150 | |
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151 | ROAR_DBG("roar_plugin_write_integer(ext=%p, key=%i, value=%p) = ?", ext, (int)key, value); |
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152 | |
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153 | for (sid = 0; sid < MAX_STREAMS && self->streams[sid].id != (int)key; sid++) |
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154 | |
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155 | if ( sid == MAX_STREAMS ) |
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156 | return -EIO; |
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157 | |
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158 | mixer.scale = 65535; |
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159 | mixer.rpg_mul = 1; |
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160 | mixer.rpg_div = 1; |
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161 | |
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162 | for (i = 0; i < (int)self->streams[i].channels; i++) |
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163 | mixer.mixer[i] = value[i]; |
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164 | |
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165 | roar_err_clear_all(); |
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166 | if ( roar_set_vol(&(self->roar.con), key, &mixer, self->streams[sid].channels, ROAR_SET_VOL_ALL) == -1 ) { |
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167 | roar_err_update(); |
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168 | return -errno; |
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169 | } |
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170 | |
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171 | return 0; |
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172 | } |
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173 | |
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174 | static int roar_plugin_read_event(snd_ctl_ext_t *ext ATTRIBUTE_UNUSED, |
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175 | snd_ctl_elem_id_t *id ATTRIBUTE_UNUSED, |
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176 | unsigned int *event_mask ATTRIBUTE_UNUSED) { |
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177 | return -EAGAIN; |
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178 | } |
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179 | |
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180 | static void roar_plugin__handle_stream(struct roar_alsa_ctl * self, int id) { |
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181 | struct roar_mixerstream * cs = NULL; |
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182 | struct roar_stream s; |
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183 | char name[1024]; |
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184 | int i; |
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185 | |
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186 | if ( roar_get_stream(&(self->roar.con), &s, id) == -1 ) |
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187 | return; |
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188 | |
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189 | switch (s.dir) { |
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190 | case ROAR_DIR_OUTPUT: |
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191 | case ROAR_DIR_MIXING: |
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192 | case ROAR_DIR_BRIDGE: |
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193 | if ( roar_stream_get_name(&(self->roar.con), &s, name, sizeof(name)) != 0 ) |
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194 | snprintf(name, sizeof(name), "Stream %i", id); |
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195 | break; |
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196 | default: |
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197 | return; |
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198 | break; |
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199 | } |
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200 | |
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201 | switch (s.dir) { |
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202 | case ROAR_DIR_MIXING: |
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203 | case ROAR_DIR_BRIDGE: |
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204 | if ( strstr(name, "MIDI") != NULL || strstr(name, "Light") != NULL ) |
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205 | return; |
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206 | break; |
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207 | } |
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208 | |
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209 | for (i = 0; cs == NULL && i < (int)(sizeof(self->streams)/sizeof(*self->streams)); i++) |
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210 | if (self->streams[i].id == -1 ) |
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211 | cs = &(self->streams[i]); |
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212 | |
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213 | if ( cs == NULL ) |
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214 | return; |
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215 | |
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216 | cs->id = id; |
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217 | cs->channels = s.info.channels; |
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218 | strncpy(cs->name, name, sizeof(cs->name) - 1); |
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219 | } |
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220 | |
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221 | static int roar_plugin__find_streams(struct roar_alsa_ctl * self) { |
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222 | int id[ROAR_STREAMS_MAX]; |
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223 | int num; |
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224 | int i; |
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225 | |
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226 | for (i = 0; i < (int)(sizeof(self->streams)/sizeof(*self->streams)); i++) |
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227 | self->streams[i].id = -1; |
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228 | |
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229 | roar_err_clear_all(); |
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230 | |
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231 | if ( (num = roar_list_streams(&(self->roar.con), id, ROAR_STREAMS_MAX)) == -1 ) { |
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232 | roar_err_update(); |
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233 | return -errno; |
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234 | } |
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235 | |
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236 | for (i = 0; i < num; i++) |
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237 | roar_plugin__handle_stream(self, i); |
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238 | |
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239 | return 0; |
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240 | } |
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241 | |
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242 | static snd_ctl_ext_callback_t roar_ext_callback = { |
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243 | .close = roar_plugin_close, |
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244 | .elem_count = roar_plugin_elem_count, |
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245 | .elem_list = roar_plugin_elem_list, |
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246 | .find_elem = roar_plugin_find_elem, |
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247 | .get_attribute = roar_plugin_get_attribute, |
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248 | .get_integer_info = roar_plugin_get_integer_info, |
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249 | .read_integer = roar_plugin_read_integer, |
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250 | .write_integer = roar_plugin_write_integer, |
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251 | .read_event = roar_plugin_read_event |
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252 | }; |
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253 | |
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254 | SND_CTL_PLUGIN_DEFINE_FUNC(roar) { |
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255 | struct roar_alsa_ctl * self; |
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256 | snd_config_iterator_t i, next; |
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257 | snd_config_t * n; |
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258 | const char * para; |
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259 | const char * server = NULL; |
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260 | int error; |
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261 | |
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262 | const char * ext_id = "ROAR"; |
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263 | const char * ext_name = "RoarAudio"; |
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264 | |
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265 | (void)root; |
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266 | |
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267 | #ifdef DEBUG |
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268 | roar_vio_open_dstr_simple(&DEBUG_FH, "/tmp/alsamixer-roar.log", O_WRONLY|O_CREAT|O_APPEND); |
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269 | roar_debug_set_stderr_vio(&DEBUG_FH); |
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270 | roar_debug_set_stderr_mode(ROAR_DEBUG_MODE_VIO); |
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271 | #endif |
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272 | |
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273 | snd_config_for_each(i, next, conf) { |
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274 | n = snd_config_iterator_entry(i); |
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275 | if ( snd_config_get_id(n, ¶) < 0 ) |
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276 | continue; |
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277 | |
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278 | if ( !strcmp(para, "type") || !strcmp(para, "comment") || !strcmp(para, "hint") ) |
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279 | continue; |
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280 | |
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281 | if ( !strcmp(para, "server") ) { |
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282 | if (snd_config_get_string(n, &server) < 0) { |
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283 | return -EINVAL; |
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284 | } |
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285 | } else { |
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286 | return -EINVAL; |
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287 | } |
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288 | } |
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289 | |
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290 | if ( (self = malloc(sizeof(struct roar_alsa_ctl))) == NULL ) |
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291 | return -errno; |
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292 | |
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293 | memset(self, 0, sizeof(struct roar_alsa_ctl)); |
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294 | |
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295 | errno = ENOSYS; |
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296 | if ( roar_simple_connect(&(self->roar.con), server, "ALSA Plugin") == -1 ) { |
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297 | free(self); |
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298 | return -errno; |
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299 | } |
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300 | |
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301 | if ( (error = roar_plugin__find_streams(self)) < 0 ) { |
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302 | roar_disconnect(&(self->roar.con)); |
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303 | free(self); |
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304 | return error; |
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305 | } |
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306 | |
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307 | self->ext.version = SND_CTL_EXT_VERSION; |
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308 | self->ext.card_idx = 0; /* FIXME */ |
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309 | strncpy(self->ext.id, ext_id, sizeof(self->ext.id) - 1); |
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310 | strcpy(self->ext.driver, "OSS-Emulation"); |
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311 | strncpy(self->ext.name, ext_name, sizeof(self->ext.name) - 1); |
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312 | strncpy(self->ext.longname, ext_name, sizeof(self->ext.longname) - 1); |
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313 | strncpy(self->ext.mixername, ext_name, sizeof(self->ext.mixername) - 1); |
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314 | self->ext.poll_fd = -1; |
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315 | self->ext.callback = &roar_ext_callback; |
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316 | self->ext.private_data = self; |
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317 | |
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318 | if ( (error = snd_ctl_ext_create(&(self->ext), name, mode)) < 0 ) { |
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319 | roar_disconnect(&(self->roar.con)); |
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320 | free(self); |
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321 | return error; |
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322 | } |
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323 | |
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324 | *handlep = self->ext.handle; |
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325 | return 0; |
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326 | } |
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327 | |
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328 | SND_CTL_PLUGIN_SYMBOL(roar); |
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