1 | //hwmixer_oss.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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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 | #define OSS_VOLUME_SCALE 100 |
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29 | |
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30 | struct subdev { |
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31 | int bit; |
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32 | int channels; |
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33 | long long int cmd_read, cmd_write; |
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34 | }; |
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35 | |
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36 | int hwmixer_oss_open(struct hwmixer_stream * stream, char * drv, char * dev, int fh, char * basename, struct roar_keyval * subnames, size_t subnamelen) { |
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37 | struct roar_vio_calls * vio = roar_mm_malloc(sizeof(struct roar_vio_calls)); |
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38 | struct roar_vio_defaults def; |
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39 | struct roar_stream_server * ss; |
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40 | struct roar_vio_sysio_ioctl ctl; |
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41 | int devmask, sdevmask; |
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42 | struct subdev * subdev = roar_mm_malloc(sizeof(struct subdev)); |
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43 | |
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44 | if ( vio == NULL || subdev == NULL ) { |
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45 | if ( vio != NULL ) |
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46 | roar_mm_free(vio); |
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47 | if ( subdev != NULL ) |
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48 | roar_mm_free(subdev); |
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49 | return -1; |
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50 | } |
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51 | |
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52 | if ( fh == -1 ) { |
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53 | if ( dev == NULL ) { |
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54 | dev = "/dev/mixer"; |
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55 | } |
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56 | |
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57 | if ( dev == NULL ) { |
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58 | roar_mm_free(vio); |
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59 | roar_mm_free(subdev); |
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60 | return -1; |
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61 | } |
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62 | |
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63 | if ( roar_vio_dstr_init_defaults(&def, ROAR_VIO_DEF_TYPE_FILE, O_RDWR, 0644) == -1 ) { |
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64 | roar_mm_free(vio); |
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65 | roar_mm_free(subdev); |
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66 | return -1; |
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67 | } |
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68 | |
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69 | if ( roar_vio_open_dstr(vio, dev, &def, 1) == -1 ) { |
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70 | roar_mm_free(vio); |
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71 | roar_mm_free(subdev); |
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72 | return -1; |
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73 | } |
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74 | } else { |
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75 | if ( roar_vio_open_fh(vio, fh) == -1 ) { |
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76 | roar_mm_free(vio); |
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77 | roar_mm_free(subdev); |
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78 | return -1; |
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79 | } |
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80 | } |
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81 | |
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82 | stream->baseud = vio; |
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83 | stream->ud = subdev; |
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84 | |
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85 | ctl.cmd = SOUND_MIXER_READ_DEVMASK; |
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86 | ctl.argp = &devmask; |
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87 | |
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88 | if ( roar_vio_ctl(vio, ROAR_VIO_CTL_SYSIO_IOCTL, &ctl) == -1 ) { |
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89 | roar_vio_close(vio); |
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90 | roar_mm_free(vio); |
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91 | roar_mm_free(subdev); |
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92 | return -1; |
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93 | } |
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94 | |
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95 | ctl.cmd = SOUND_MIXER_READ_STEREODEVS; |
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96 | ctl.argp = &sdevmask; |
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97 | |
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98 | if ( roar_vio_ctl(vio, ROAR_VIO_CTL_SYSIO_IOCTL, &ctl) == -1 ) { |
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99 | sdevmask = 0; |
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100 | } |
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101 | |
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102 | memset(subdev, 0, sizeof(struct subdev)); |
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103 | |
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104 | if ( devmask & SOUND_MASK_VOLUME ) { |
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105 | subdev->bit = SOUND_MASK_VOLUME; |
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106 | subdev->channels = sdevmask & SOUND_MASK_VOLUME ? 2 : 1; |
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107 | subdev->cmd_read = SOUND_MIXER_READ_VOLUME; |
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108 | subdev->cmd_write = SOUND_MIXER_WRITE_VOLUME; |
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109 | } else { |
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110 | roar_vio_close(vio); |
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111 | roar_mm_free(vio); |
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112 | roar_mm_free(subdev); |
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113 | return -1; |
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114 | } |
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115 | |
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116 | if (streams_get(stream->basestream, &ss) != -1) { |
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117 | ROAR_STREAM(ss)->info.channels = 2; |
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118 | } else { |
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119 | ROAR_WARN("hwmixer_dstr_open(*): can not get object for basestream %i", stream->basestream); |
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120 | } |
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121 | |
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122 | #ifdef TEST_HWMIXER_SUBSTREAMS |
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123 | stream = hwmixer_substream_new(stream); |
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124 | if ( stream == NULL ) { |
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125 | ROAR_WARN("hwmixer_dstr_open(*): can not create substream"); |
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126 | } else { |
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127 | if (streams_get(stream->stream, &ss) != -1) { |
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128 | ROAR_STREAM(ss)->info.channels = 2; |
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129 | } else { |
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130 | ROAR_WARN("hwmixer_dstr_open(*): can not get object for stream %i", stream->stream); |
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131 | } |
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132 | } |
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133 | #endif |
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134 | |
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135 | return 0; |
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136 | } |
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137 | |
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138 | int hwmixer_oss_close(struct hwmixer_stream * stream) { |
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139 | // are we a substream? if yes we do not clean up anything. |
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140 | // streams_delete() will do all our work. |
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141 | |
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142 | roar_mm_free(stream->ud); |
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143 | |
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144 | if ( stream->stream != stream->basestream ) |
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145 | return 0; |
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146 | |
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147 | roar_vio_close(stream->baseud); |
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148 | roar_mm_free(stream->baseud); |
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149 | return 0; |
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150 | } |
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151 | |
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152 | int hwmixer_oss_set_vol(struct hwmixer_stream * stream, int channels, int mode, struct roar_mixer_settings * settings) { |
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153 | struct roar_vio_calls * vio = stream->baseud; |
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154 | struct roar_vio_sysio_ioctl ctl; |
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155 | struct subdev * subdev = stream->ud; |
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156 | int i; |
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157 | int l, r; |
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158 | |
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159 | if ( channels == 0 ) |
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160 | return 0; |
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161 | |
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162 | if ( channels == 1 ) { |
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163 | l = r = settings->mixer[0]; |
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164 | } else { |
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165 | l = settings->mixer[0]; |
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166 | r = settings->mixer[1]; |
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167 | } |
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168 | |
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169 | if ( subdev->channels == 1 ) { |
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170 | l = r = (l + r) / 2; |
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171 | } |
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172 | |
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173 | l = (l * OSS_VOLUME_SCALE) / settings->scale; |
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174 | r = (r * OSS_VOLUME_SCALE) / settings->scale; |
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175 | |
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176 | i = (l & 0xFF) | ((r & 0xFF) << 8); |
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177 | |
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178 | ctl.cmd = subdev->cmd_write; |
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179 | ctl.argp = &i; |
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180 | |
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181 | return roar_vio_ctl(vio, ROAR_VIO_CTL_SYSIO_IOCTL, &ctl); |
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182 | } |
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183 | |
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184 | int hwmixer_oss_get_vol(struct hwmixer_stream * stream, int channels, int mode, struct roar_mixer_settings * settings) { |
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185 | struct roar_vio_calls * vio = stream->baseud; |
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186 | struct roar_vio_sysio_ioctl ctl; |
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187 | struct subdev * subdev = stream->ud; |
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188 | int i; |
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189 | int l, r; |
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190 | |
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191 | ctl.cmd = subdev->cmd_read; |
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192 | ctl.argp = &i; |
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193 | |
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194 | if ( roar_vio_ctl(vio, ROAR_VIO_CTL_SYSIO_IOCTL, &ctl) == -1 ) |
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195 | return -1; |
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196 | |
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197 | l = i & 0xFF; |
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198 | r = (i >> 8) & 0xFF; |
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199 | |
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200 | if ( subdev->channels == 1 ) |
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201 | r = l; |
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202 | |
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203 | settings->scale = OSS_VOLUME_SCALE; |
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204 | |
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205 | if ( channels == 1 ) { |
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206 | settings->mixer[0] = (l + r) / 2; |
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207 | } else if ( channels == 2 ) { |
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208 | settings->mixer[0] = l; |
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209 | settings->mixer[1] = r; |
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210 | } else { |
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211 | return -1; |
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212 | } |
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213 | |
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214 | return 0; |
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215 | } |
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216 | |
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217 | //ll |
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