1 /* ALSA mixer implementation. |
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2 * Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net> |
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3 * |
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4 * This library is free software; you can redistribute it and/or |
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5 * modify it under the terms of the GNU Library General Public |
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6 * License as published by the Free Software Foundation; either |
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7 * version 2 of the License, or (at your option) any later version. |
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8 * |
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9 * This library is distributed in the hope that it will be useful, |
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 * Library General Public License for more details. |
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13 * |
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14 * You should have received a copy of the GNU Library General Public |
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15 * License along with this library; if not, write to the |
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16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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17 * Boston, MA 02111-1307, USA. |
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18 */ |
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19 |
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20 /** |
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21 * SECTION:element-alsamixer |
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22 * @short_description: control properties of an audio device |
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23 * @see_also: alsasink, alsasrc |
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24 * |
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25 * <refsect2> |
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26 * <para> |
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27 * This element controls various aspects such as the volume and balance |
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28 * of an audio device using the ALSA api. |
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29 * </para> |
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30 * <para> |
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31 * The application should query and use the interfaces provided by this |
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32 * element to control the device. |
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33 * </para> |
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34 * </refsect2> |
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35 * |
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36 * Last reviewed on 2006-03-01 (0.10.4) |
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37 */ |
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38 |
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39 #ifdef HAVE_CONFIG_H |
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40 #include "config.h" |
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41 #endif |
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42 |
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43 #include "gstalsamixer.h" |
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44 |
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45 static void gst_alsa_mixer_update_option (GstAlsaMixer * mixer, |
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46 GstAlsaMixerOptions * alsa_opts); |
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47 static void gst_alsa_mixer_update_track (GstAlsaMixer * mixer, |
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48 GstAlsaMixerTrack * alsa_track); |
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49 static int gst_alsa_mixer_handle_callback (snd_mixer_t * handle, |
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50 unsigned int mask, snd_mixer_elem_t * elem); |
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51 |
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52 /* First some utils, then the mixer implementation */ |
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53 static gboolean |
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54 gst_alsa_mixer_open (GstAlsaMixer * mixer) |
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55 { |
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56 gint err; |
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57 snd_ctl_t *ctl; |
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58 snd_ctl_card_info_t *card_info; |
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59 |
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60 g_return_val_if_fail (mixer->handle == NULL, FALSE); |
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61 |
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62 /* open and initialize the mixer device */ |
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63 err = snd_mixer_open (&mixer->handle, 0); |
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64 if (err < 0 || mixer->handle == NULL) |
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65 goto open_failed; |
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66 |
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67 if ((err = snd_mixer_attach (mixer->handle, mixer->device)) < 0) { |
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68 GST_WARNING ("Cannot open mixer for sound device '%s': %s", mixer->device, |
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69 snd_strerror (err)); |
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70 goto error; |
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71 } |
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72 |
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73 if ((err = snd_mixer_selem_register (mixer->handle, NULL, NULL)) < 0) { |
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74 GST_WARNING ("Cannot register mixer elements: %s", snd_strerror (err)); |
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75 goto error; |
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76 } |
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77 |
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78 if ((err = snd_mixer_load (mixer->handle)) < 0) { |
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79 GST_WARNING ("Cannot load mixer settings: %s", snd_strerror (err)); |
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80 goto error; |
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81 } |
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82 |
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83 snd_mixer_set_callback_private (mixer->handle, mixer); |
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84 snd_mixer_set_callback (mixer->handle, gst_alsa_mixer_handle_callback); |
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85 |
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86 /* now get the device name, any of this is not fatal */ |
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87 g_free (mixer->cardname); |
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88 if ((err = snd_ctl_open (&ctl, mixer->device, 0)) < 0) { |
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89 GST_WARNING ("Cannot open CTL: %s", snd_strerror (err)); |
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90 goto no_card_name; |
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91 } |
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92 |
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93 snd_ctl_card_info_malloc (&card_info); |
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94 if ((err = snd_ctl_card_info (ctl, card_info)) < 0) { |
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95 GST_WARNING ("Cannot get card info: %s", snd_strerror (err)); |
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96 snd_ctl_close (ctl); |
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97 goto no_card_name; |
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98 } |
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99 |
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100 mixer->cardname = g_strdup (snd_ctl_card_info_get_name (card_info)); |
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101 GST_DEBUG ("Card name = %s", GST_STR_NULL (mixer->cardname)); |
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102 snd_ctl_card_info_free (card_info); |
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103 snd_ctl_close (ctl); |
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104 |
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105 no_card_name: |
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106 if (mixer->cardname == NULL) { |
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107 mixer->cardname = g_strdup ("Unknown"); |
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108 GST_DEBUG ("Cannot find card name"); |
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109 } |
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110 |
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111 GST_INFO ("Successfully opened mixer for device '%s'.", mixer->device); |
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112 |
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113 return TRUE; |
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114 |
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115 /* ERROR */ |
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116 open_failed: |
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117 { |
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118 GST_WARNING ("Cannot open mixer: %s", snd_strerror (err)); |
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119 mixer->handle = NULL; |
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120 return FALSE; |
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121 } |
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122 error: |
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123 { |
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124 snd_mixer_close (mixer->handle); |
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125 mixer->handle = NULL; |
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126 return FALSE; |
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127 } |
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128 } |
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129 |
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130 static snd_mixer_elem_t * |
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131 gst_alsa_mixer_find_master_mixer (GstAlsaMixer * mixer, snd_mixer_t * handle) |
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132 { |
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133 snd_mixer_elem_t *element; |
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134 gint i, count; |
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135 |
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136 count = snd_mixer_get_count (handle); |
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137 |
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138 /* Check if we have a playback mixer labelled as 'Master' */ |
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139 element = snd_mixer_first_elem (handle); |
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140 for (i = 0; i < count; i++) { |
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141 if (snd_mixer_selem_has_playback_volume (element) && |
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142 strcmp (snd_mixer_selem_get_name (element), "Master") == 0) { |
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143 return element; |
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144 } |
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145 element = snd_mixer_elem_next (element); |
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146 } |
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147 |
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148 /* If not, check if we have a playback mixer labelled as 'Front' */ |
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149 element = snd_mixer_first_elem (handle); |
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150 for (i = 0; i < count; i++) { |
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151 if (snd_mixer_selem_has_playback_volume (element) && |
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152 strcmp (snd_mixer_selem_get_name (element), "Front") == 0) { |
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153 return element; |
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154 } |
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155 element = snd_mixer_elem_next (element); |
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156 } |
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157 |
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158 /* If not, check if we have a playback mixer labelled as 'PCM' */ |
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159 element = snd_mixer_first_elem (handle); |
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160 for (i = 0; i < count; i++) { |
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161 if (snd_mixer_selem_has_playback_volume (element) && |
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162 strcmp (snd_mixer_selem_get_name (element), "PCM") == 0) { |
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163 return element; |
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164 } |
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165 element = snd_mixer_elem_next (element); |
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166 } |
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167 |
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168 /* If not, check if we have a playback mixer with both volume and switch */ |
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169 element = snd_mixer_first_elem (handle); |
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170 for (i = 0; i < count; i++) { |
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171 if (snd_mixer_selem_has_playback_volume (element) && |
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172 snd_mixer_selem_has_playback_switch (element)) { |
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173 return element; |
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174 } |
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175 element = snd_mixer_elem_next (element); |
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176 } |
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177 |
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178 /* If not, take any playback mixer with a volume control */ |
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179 element = snd_mixer_first_elem (handle); |
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180 for (i = 0; i < count; i++) { |
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181 if (snd_mixer_selem_has_playback_volume (element)) { |
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182 return element; |
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183 } |
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184 element = snd_mixer_elem_next (element); |
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185 } |
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186 |
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187 /* Looks like we're out of luck ... */ |
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188 return NULL; |
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189 } |
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190 |
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191 static void |
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192 gst_alsa_mixer_update (GstAlsaMixer * mixer, snd_mixer_elem_t * elem) |
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193 { |
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194 GList *item; |
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195 |
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196 g_return_if_fail (mixer != NULL); |
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197 |
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198 g_static_rec_mutex_lock (mixer->rec_mutex); |
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199 |
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200 for (item = mixer->tracklist; item != NULL; item = item->next) { |
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201 if (GST_IS_ALSA_MIXER_TRACK (item->data)) { |
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202 if (elem && (GST_ALSA_MIXER_TRACK (item->data)->element != elem)) |
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203 continue; |
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204 |
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205 gst_alsa_mixer_update_track (mixer, GST_ALSA_MIXER_TRACK (item->data)); |
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206 } else if (GST_IS_ALSA_MIXER_OPTIONS (item->data)) { |
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207 if (elem && (GST_ALSA_MIXER_OPTIONS (item->data)->element != elem)) |
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208 continue; |
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209 |
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210 gst_alsa_mixer_update_option (mixer, GST_ALSA_MIXER_OPTIONS (item->data)); |
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211 } |
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212 } |
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213 |
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214 g_static_rec_mutex_unlock (mixer->rec_mutex); |
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215 } |
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216 |
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217 static int |
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218 gst_alsa_mixer_elem_handle_callback (snd_mixer_elem_t * elem, unsigned int mask) |
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219 { |
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220 GstAlsaMixer *mixer = |
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221 (GstAlsaMixer *) snd_mixer_elem_get_callback_private (elem); |
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222 |
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223 GST_LOG ("ALSA elem cb"); |
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224 |
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225 g_return_val_if_fail (mixer != NULL, 1); |
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226 |
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227 gst_alsa_mixer_update (mixer, elem); |
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228 |
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229 return 0; |
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230 } |
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231 |
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232 static int |
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233 gst_alsa_mixer_handle_callback (snd_mixer_t * handle, unsigned int mask, |
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234 snd_mixer_elem_t * elem) |
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235 { |
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236 GstAlsaMixer *mixer = |
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237 (GstAlsaMixer *) snd_mixer_get_callback_private (handle); |
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238 |
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239 GST_LOG ("ALSA cb"); |
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240 |
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241 g_return_val_if_fail (mixer != NULL, 1); |
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242 |
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243 /* Hopefully won't be call recursively and will handle pending elem events */ |
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244 snd_mixer_handle_events (mixer->handle); |
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245 |
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246 gst_alsa_mixer_update (mixer, elem); |
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247 |
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248 return 0; |
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249 } |
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250 |
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251 static void |
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252 gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer) |
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253 { |
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254 gint i, count; |
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255 snd_mixer_elem_t *element, *master; |
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256 GList *item; |
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257 |
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258 g_return_if_fail (mixer->handle != NULL); |
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259 |
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260 if (mixer->tracklist) |
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261 return; |
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262 |
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263 g_static_rec_mutex_lock (mixer->rec_mutex); |
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264 |
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265 master = gst_alsa_mixer_find_master_mixer (mixer, mixer->handle); |
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266 |
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267 count = snd_mixer_get_count (mixer->handle); |
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268 element = snd_mixer_first_elem (mixer->handle); |
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269 |
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270 /* build track list |
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271 * |
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272 * Some ALSA tracks may have playback and capture capabilities. |
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273 * Here we model them as two separate GStreamer tracks. |
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274 */ |
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275 |
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276 for (i = 0; i < count; i++) { |
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277 GstMixerTrack *play_track = NULL; |
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278 GstMixerTrack *cap_track = NULL; |
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279 const gchar *name; |
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280 GList *item; |
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281 gint samename = 0; |
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282 |
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283 name = snd_mixer_selem_get_name (element); |
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284 |
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285 /* prevent dup names */ |
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286 for (item = mixer->tracklist; item != NULL; item = item->next) { |
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287 snd_mixer_elem_t *temp; |
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288 |
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289 if (GST_IS_ALSA_MIXER_OPTIONS (item->data)) |
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290 temp = GST_ALSA_MIXER_OPTIONS (item->data)->element; |
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291 else |
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292 temp = GST_ALSA_MIXER_TRACK (item->data)->element; |
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293 |
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294 if (strcmp (name, snd_mixer_selem_get_name (temp)) == 0) |
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295 samename++; |
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296 } |
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297 |
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298 GST_LOG ("[%s] probing element #%u, mixer->dir=%u", name, i, mixer->dir); |
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299 |
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300 if (mixer->dir & GST_ALSA_MIXER_PLAYBACK) { |
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301 gboolean has_playback_switch, has_playback_volume; |
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302 |
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303 has_playback_switch = snd_mixer_selem_has_playback_switch (element); |
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304 has_playback_volume = snd_mixer_selem_has_playback_volume (element); |
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305 |
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306 GST_LOG ("[%s] PLAYBACK: has_playback_volume=%d, has_playback_switch=%d" |
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307 "%s", name, has_playback_volume, has_playback_switch, |
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308 (element == master) ? " MASTER" : ""); |
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309 |
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310 if (has_playback_volume) { |
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311 gint flags = GST_MIXER_TRACK_OUTPUT; |
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312 |
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313 if (element == master) |
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314 flags |= GST_MIXER_TRACK_MASTER; |
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315 |
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316 play_track = gst_alsa_mixer_track_new (element, samename, i, |
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317 flags, FALSE, NULL, FALSE); |
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318 |
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319 } else if (has_playback_switch) { |
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320 /* simple mute switch */ |
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321 play_track = gst_alsa_mixer_track_new (element, samename, i, |
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322 GST_MIXER_TRACK_OUTPUT, TRUE, NULL, FALSE); |
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323 } |
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324 |
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325 if (snd_mixer_selem_is_enumerated (element)) { |
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326 GstMixerOptions *opts = gst_alsa_mixer_options_new (element, i); |
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327 |
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328 GST_LOG ("[%s] is enumerated (%d)", name, i); |
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329 mixer->tracklist = g_list_append (mixer->tracklist, opts); |
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330 } |
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331 } |
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332 |
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333 if (mixer->dir & GST_ALSA_MIXER_CAPTURE) { |
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334 gboolean has_capture_switch, has_common_switch; |
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335 gboolean has_capture_volume, has_common_volume; |
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336 |
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337 has_capture_switch = snd_mixer_selem_has_capture_switch (element); |
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338 has_common_switch = snd_mixer_selem_has_common_switch (element); |
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339 has_capture_volume = snd_mixer_selem_has_capture_volume (element); |
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340 has_common_volume = snd_mixer_selem_has_common_volume (element); |
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341 |
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342 GST_LOG ("[%s] CAPTURE: has_capture_volume=%d, has_common_volume=%d, " |
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343 "has_capture_switch=%d, has_common_switch=%d, play_track=%p", name, |
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344 has_capture_volume, has_common_volume, has_capture_switch, |
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345 has_common_switch, play_track); |
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346 |
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347 if (has_capture_volume && !(play_track && has_common_volume)) { |
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348 cap_track = gst_alsa_mixer_track_new (element, samename, i, |
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349 GST_MIXER_TRACK_INPUT, FALSE, NULL, play_track != NULL); |
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350 } else if (has_capture_switch && !(play_track && has_common_switch)) { |
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351 cap_track = gst_alsa_mixer_track_new (element, samename, i, |
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352 GST_MIXER_TRACK_INPUT, TRUE, NULL, play_track != NULL); |
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353 } |
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354 } |
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355 |
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356 |
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357 if (play_track && cap_track) { |
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358 GST_ALSA_MIXER_TRACK (play_track)->shared_mute = |
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359 GST_ALSA_MIXER_TRACK (cap_track); |
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360 GST_ALSA_MIXER_TRACK (cap_track)->shared_mute = |
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361 GST_ALSA_MIXER_TRACK (play_track); |
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362 } |
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363 |
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364 if (play_track) |
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365 mixer->tracklist = g_list_append (mixer->tracklist, play_track); |
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366 |
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367 if (cap_track) |
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368 mixer->tracklist = g_list_append (mixer->tracklist, cap_track); |
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369 |
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370 element = snd_mixer_elem_next (element); |
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371 } |
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372 |
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373 for (item = mixer->tracklist; item != NULL; item = item->next) { |
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374 snd_mixer_elem_t *temp; |
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375 |
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376 if (GST_IS_ALSA_MIXER_OPTIONS (item->data)) |
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377 temp = GST_ALSA_MIXER_OPTIONS (item->data)->element; |
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378 else |
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379 temp = GST_ALSA_MIXER_TRACK (item->data)->element; |
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380 |
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381 snd_mixer_elem_set_callback (temp, gst_alsa_mixer_elem_handle_callback); |
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382 snd_mixer_elem_set_callback_private (temp, mixer); |
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383 } |
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384 |
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385 g_static_rec_mutex_unlock (mixer->rec_mutex); |
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386 } |
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387 |
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388 static void |
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389 task_monitor_alsa (gpointer data) |
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390 { |
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391 struct pollfd *pfds; |
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392 unsigned int nfds, rnfds; |
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393 unsigned short revents; |
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394 GstAlsaMixer *mixer = (GstAlsaMixer *) data; |
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395 |
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396 g_static_rec_mutex_lock (mixer->rec_mutex); |
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397 |
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398 nfds = snd_mixer_poll_descriptors_count (mixer->handle); |
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399 if (nfds <= 0) { |
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400 GST_ERROR ("snd_mixer_poll_descriptors_count <= 0: %d", nfds); |
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401 /* FIXME: sleep ? stop monitoring ? */ |
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402 return; |
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403 } |
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404 |
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405 pfds = g_newa (struct pollfd, nfds + 1); |
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406 rnfds = snd_mixer_poll_descriptors (mixer->handle, pfds, nfds); |
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407 g_assert (rnfds <= nfds); |
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408 |
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409 pfds[rnfds].fd = mixer->pfd[0]; |
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410 pfds[rnfds].events = POLLIN | POLLPRI | POLLHUP | POLLERR; |
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411 pfds[rnfds].revents = 0; |
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412 |
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413 g_static_rec_mutex_unlock (mixer->rec_mutex); |
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414 |
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415 GST_LOG ("task loop"); |
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416 poll (pfds, rnfds + 1, -1); |
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417 |
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418 g_static_rec_mutex_lock (mixer->rec_mutex); |
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419 |
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420 snd_mixer_poll_descriptors_revents (mixer->handle, pfds, nfds, &revents); |
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421 if (revents & POLLIN || revents & POLLPRI) { |
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422 GST_DEBUG ("Handling events"); |
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423 snd_mixer_handle_events (mixer->handle); |
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424 } |
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425 |
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426 g_static_rec_mutex_unlock (mixer->rec_mutex); |
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427 } |
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428 |
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429 /* API */ |
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430 |
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431 GstAlsaMixer * |
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432 gst_alsa_mixer_new (const char *device, GstAlsaMixerDirection dir) |
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433 { |
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434 GstAlsaMixer *ret = NULL; |
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435 |
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436 g_return_val_if_fail (device != NULL, NULL); |
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437 |
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438 ret = g_new0 (GstAlsaMixer, 1); |
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439 |
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440 if (pipe (ret->pfd) == -1) |
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441 goto error; |
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442 |
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443 ret->rec_mutex = g_new (GStaticRecMutex, 1); |
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444 g_static_rec_mutex_init (ret->rec_mutex); |
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445 |
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446 ret->task_mutex = g_new (GStaticRecMutex, 1); |
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447 g_static_rec_mutex_init (ret->task_mutex); |
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448 |
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449 ret->task = gst_task_create (task_monitor_alsa, ret); |
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450 gst_task_set_lock (ret->task, ret->task_mutex); |
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451 |
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452 ret->device = g_strdup (device); |
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453 ret->dir = dir; |
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454 |
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455 if (!gst_alsa_mixer_open (ret)) |
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456 goto error; |
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457 |
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458 if (gst_task_start (ret->task) == FALSE) { |
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459 GST_WARNING ("Could not start alsamixer task"); |
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460 } |
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461 |
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462 return ret; |
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463 |
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464 /* ERRORS */ |
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465 error: |
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466 { |
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467 gst_alsa_mixer_free (ret); |
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468 return NULL; |
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469 } |
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470 } |
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471 |
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472 void |
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473 gst_alsa_mixer_free (GstAlsaMixer * mixer) |
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474 { |
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475 g_return_if_fail (mixer != NULL); |
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476 |
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477 if (mixer->task) { |
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478 if (write (mixer->pfd[1], "stop", 5) <= 0) { |
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479 GST_ERROR ("Cannot send " "stop" " to alsamixer task"); |
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480 close (mixer->pfd[1]); |
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481 mixer->pfd[1] = -1; |
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482 } |
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483 |
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484 if (gst_task_join (mixer->task) == FALSE) { |
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485 GST_ERROR ("Cannot join alsamixer task"); |
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486 } |
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487 |
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488 gst_object_unref (mixer->task); |
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489 mixer->task = NULL; |
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490 } |
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491 |
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492 g_static_rec_mutex_free (mixer->task_mutex); |
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493 g_free (mixer->task_mutex); |
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494 mixer->task_mutex = NULL; |
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495 |
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496 if (mixer->pfd[0] > 0) { |
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497 close (mixer->pfd[0]); |
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498 mixer->pfd[0] = -1; |
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499 } |
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500 |
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501 if (mixer->pfd[1] > 0) { |
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502 close (mixer->pfd[1]); |
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503 mixer->pfd[1] = -1; |
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504 } |
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505 |
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506 if (mixer->interface) { |
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507 g_object_unref (G_OBJECT (mixer->interface)); |
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508 mixer->interface = NULL; |
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509 } |
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510 |
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511 if (mixer->device) { |
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512 g_free (mixer->device); |
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513 mixer->device = NULL; |
|
514 } |
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515 |
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516 if (mixer->cardname) { |
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517 g_free (mixer->cardname); |
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518 mixer->cardname = NULL; |
|
519 } |
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520 |
|
521 if (mixer->tracklist) { |
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522 g_list_foreach (mixer->tracklist, (GFunc) g_object_unref, NULL); |
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523 g_list_free (mixer->tracklist); |
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524 mixer->tracklist = NULL; |
|
525 } |
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526 |
|
527 if (mixer->handle) { |
|
528 snd_mixer_close (mixer->handle); |
|
529 mixer->handle = NULL; |
|
530 } |
|
531 |
|
532 g_static_rec_mutex_free (mixer->rec_mutex); |
|
533 g_free (mixer->rec_mutex); |
|
534 mixer->rec_mutex = NULL; |
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535 |
|
536 g_free (mixer); |
|
537 } |
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538 |
|
539 const GList * |
|
540 gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer) |
|
541 { |
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542 g_return_val_if_fail (mixer->handle != NULL, NULL); |
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543 |
|
544 gst_alsa_mixer_ensure_track_list (mixer); |
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545 |
|
546 return (const GList *) mixer->tracklist; |
|
547 } |
|
548 |
|
549 void |
|
550 gst_alsa_mixer_get_volume (GstAlsaMixer * mixer, GstMixerTrack * track, |
|
551 gint * volumes) |
|
552 { |
|
553 gint i; |
|
554 GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track); |
|
555 |
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556 g_return_if_fail (mixer->handle != NULL); |
|
557 |
|
558 gst_alsa_mixer_track_update (alsa_track); |
|
559 |
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560 if (track->flags & GST_MIXER_TRACK_OUTPUT) { /* return playback volume */ |
|
561 |
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562 /* Is emulated mute flag activated? */ |
|
563 if (track->flags & GST_MIXER_TRACK_MUTE && |
|
564 !(alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH)) { |
|
565 for (i = 0; i < track->num_channels; i++) |
|
566 volumes[i] = alsa_track->volumes[i]; |
|
567 } else { |
|
568 for (i = 0; i < track->num_channels; i++) { |
|
569 long tmp = 0; |
|
570 |
|
571 snd_mixer_selem_get_playback_volume (alsa_track->element, i, &tmp); |
|
572 alsa_track->volumes[i] = volumes[i] = (gint) tmp; |
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573 } |
|
574 } |
|
575 |
|
576 } else if (track->flags & GST_MIXER_TRACK_INPUT) { /* return capture volume */ |
|
577 |
|
578 /* Is emulated record flag activated? */ |
|
579 if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH || |
|
580 track->flags & GST_MIXER_TRACK_RECORD) { |
|
581 for (i = 0; i < track->num_channels; i++) { |
|
582 long tmp = 0; |
|
583 |
|
584 snd_mixer_selem_get_capture_volume (alsa_track->element, i, &tmp); |
|
585 alsa_track->volumes[i] = volumes[i] = (gint) tmp; |
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586 } |
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587 } else { |
|
588 for (i = 0; i < track->num_channels; i++) |
|
589 volumes[i] = alsa_track->volumes[i]; |
|
590 } |
|
591 } |
|
592 } |
|
593 |
|
594 static gboolean |
|
595 check_if_volumes_are_the_same (guint num_channels, gint * volumes) |
|
596 { |
|
597 guint i; |
|
598 |
|
599 if (num_channels <= 1) |
|
600 return TRUE; |
|
601 |
|
602 for (i = 1; i < num_channels; i++) { |
|
603 if (volumes[i] != volumes[0]) |
|
604 return FALSE; |
|
605 } |
|
606 |
|
607 return TRUE; |
|
608 } |
|
609 |
|
610 void |
|
611 gst_alsa_mixer_set_volume (GstAlsaMixer * mixer, GstMixerTrack * track, |
|
612 gint * volumes) |
|
613 { |
|
614 GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track); |
|
615 gint i; |
|
616 |
|
617 g_return_if_fail (mixer->handle != NULL); |
|
618 |
|
619 gst_alsa_mixer_track_update (alsa_track); |
|
620 |
|
621 if (track->flags & GST_MIXER_TRACK_OUTPUT) { |
|
622 |
|
623 /* Is emulated mute flag activated? */ |
|
624 if (track->flags & GST_MIXER_TRACK_MUTE && |
|
625 !(alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH)) { |
|
626 for (i = 0; i < track->num_channels; i++) |
|
627 alsa_track->volumes[i] = volumes[i]; |
|
628 } else { |
|
629 if (check_if_volumes_are_the_same (track->num_channels, volumes)) { |
|
630 snd_mixer_selem_set_playback_volume_all (alsa_track->element, |
|
631 volumes[0]); |
|
632 for (i = 0; i < track->num_channels; i++) |
|
633 alsa_track->volumes[i] = volumes[0]; |
|
634 } else { |
|
635 for (i = 0; i < track->num_channels; i++) { |
|
636 alsa_track->volumes[i] = volumes[i]; |
|
637 snd_mixer_selem_set_playback_volume (alsa_track->element, i, |
|
638 volumes[i]); |
|
639 } |
|
640 } |
|
641 } |
|
642 |
|
643 } else if (track->flags & GST_MIXER_TRACK_INPUT) { |
|
644 |
|
645 /* Is emulated record flag activated? */ |
|
646 if (track->flags & GST_MIXER_TRACK_RECORD || |
|
647 alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH) { |
|
648 if (check_if_volumes_are_the_same (track->num_channels, volumes)) { |
|
649 snd_mixer_selem_set_capture_volume_all (alsa_track->element, |
|
650 volumes[0]); |
|
651 for (i = 0; i < track->num_channels; i++) |
|
652 alsa_track->volumes[i] = volumes[0]; |
|
653 } else { |
|
654 for (i = 0; i < track->num_channels; i++) { |
|
655 alsa_track->volumes[i] = volumes[i]; |
|
656 snd_mixer_selem_set_capture_volume (alsa_track->element, i, |
|
657 volumes[i]); |
|
658 } |
|
659 } |
|
660 } else { |
|
661 for (i = 0; i < track->num_channels; i++) |
|
662 alsa_track->volumes[i] = volumes[i]; |
|
663 } |
|
664 } |
|
665 } |
|
666 |
|
667 void |
|
668 gst_alsa_mixer_set_mute (GstAlsaMixer * mixer, GstMixerTrack * track, |
|
669 gboolean mute) |
|
670 { |
|
671 GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track); |
|
672 |
|
673 g_return_if_fail (mixer->handle != NULL); |
|
674 |
|
675 gst_alsa_mixer_track_update (alsa_track); |
|
676 |
|
677 if (!!(mute) == !!(track->flags & GST_MIXER_TRACK_MUTE)) |
|
678 return; |
|
679 |
|
680 if (mute) { |
|
681 track->flags |= GST_MIXER_TRACK_MUTE; |
|
682 |
|
683 if (alsa_track->shared_mute) |
|
684 ((GstMixerTrack *) (alsa_track->shared_mute))->flags |= |
|
685 GST_MIXER_TRACK_MUTE; |
|
686 } else { |
|
687 track->flags &= ~GST_MIXER_TRACK_MUTE; |
|
688 |
|
689 if (alsa_track->shared_mute) |
|
690 ((GstMixerTrack *) (alsa_track->shared_mute))->flags &= |
|
691 ~GST_MIXER_TRACK_MUTE; |
|
692 } |
|
693 |
|
694 if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH) { |
|
695 snd_mixer_selem_set_playback_switch_all (alsa_track->element, mute ? 0 : 1); |
|
696 } else { |
|
697 gint i; |
|
698 GstAlsaMixerTrack *ctrl_track; |
|
699 |
|
700 if ((track->flags & GST_MIXER_TRACK_INPUT) |
|
701 && alsa_track->shared_mute != NULL) |
|
702 ctrl_track = alsa_track->shared_mute; |
|
703 else |
|
704 ctrl_track = alsa_track; |
|
705 |
|
706 for (i = 0; i < ((GstMixerTrack *) ctrl_track)->num_channels; i++) { |
|
707 long vol = |
|
708 mute ? ((GstMixerTrack *) ctrl_track)->min_volume : ctrl_track-> |
|
709 volumes[i]; |
|
710 snd_mixer_selem_set_playback_volume (ctrl_track->element, i, vol); |
|
711 } |
|
712 } |
|
713 } |
|
714 |
|
715 void |
|
716 gst_alsa_mixer_set_record (GstAlsaMixer * mixer, |
|
717 GstMixerTrack * track, gboolean record) |
|
718 { |
|
719 GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track); |
|
720 |
|
721 g_return_if_fail (mixer->handle != NULL); |
|
722 |
|
723 gst_alsa_mixer_track_update (alsa_track); |
|
724 |
|
725 if (!!(record) == !!(track->flags & GST_MIXER_TRACK_RECORD)) |
|
726 return; |
|
727 |
|
728 if (record) { |
|
729 track->flags |= GST_MIXER_TRACK_RECORD; |
|
730 } else { |
|
731 track->flags &= ~GST_MIXER_TRACK_RECORD; |
|
732 } |
|
733 |
|
734 if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH) { |
|
735 snd_mixer_selem_set_capture_switch_all (alsa_track->element, |
|
736 record ? 1 : 0); |
|
737 |
|
738 /* update all tracks in same exlusive cswitch group */ |
|
739 if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL) { |
|
740 GList *item; |
|
741 |
|
742 for (item = mixer->tracklist; item != NULL; item = item->next) { |
|
743 |
|
744 if (GST_IS_ALSA_MIXER_TRACK (item->data)) { |
|
745 GstAlsaMixerTrack *item_alsa_track = |
|
746 GST_ALSA_MIXER_TRACK (item->data); |
|
747 |
|
748 if (item_alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL && |
|
749 item_alsa_track->capture_group == alsa_track->capture_group) { |
|
750 gst_alsa_mixer_track_update (item_alsa_track); |
|
751 } |
|
752 } |
|
753 } |
|
754 } |
|
755 } else { |
|
756 gint i; |
|
757 |
|
758 for (i = 0; i < track->num_channels; i++) { |
|
759 long vol = record ? alsa_track->volumes[i] : track->min_volume; |
|
760 |
|
761 snd_mixer_selem_set_capture_volume (alsa_track->element, i, vol); |
|
762 } |
|
763 } |
|
764 } |
|
765 |
|
766 void |
|
767 gst_alsa_mixer_set_option (GstAlsaMixer * mixer, |
|
768 GstMixerOptions * opts, gchar * value) |
|
769 { |
|
770 gint idx = -1, n = 0; |
|
771 GList *item; |
|
772 GstAlsaMixerOptions *alsa_opts = GST_ALSA_MIXER_OPTIONS (opts); |
|
773 |
|
774 g_return_if_fail (mixer->handle != NULL); |
|
775 |
|
776 for (item = opts->values; item != NULL; item = item->next, n++) { |
|
777 if (!strcmp (item->data, value)) { |
|
778 idx = n; |
|
779 break; |
|
780 } |
|
781 } |
|
782 if (idx == -1) |
|
783 return; |
|
784 |
|
785 snd_mixer_selem_set_enum_item (alsa_opts->element, 0, idx); |
|
786 } |
|
787 |
|
788 const gchar * |
|
789 gst_alsa_mixer_get_option (GstAlsaMixer * mixer, GstMixerOptions * opts) |
|
790 { |
|
791 gint ret; |
|
792 guint idx; |
|
793 GstAlsaMixerOptions *alsa_opts = GST_ALSA_MIXER_OPTIONS (opts); |
|
794 |
|
795 g_return_val_if_fail (mixer->handle != NULL, NULL); |
|
796 |
|
797 ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx); |
|
798 if (ret == 0) |
|
799 return g_list_nth_data (opts->values, idx); |
|
800 else |
|
801 return snd_strerror (ret); /* feeble attempt at error handling */ |
|
802 } |
|
803 |
|
804 GstMixerFlags |
|
805 gst_alsa_mixer_get_mixer_flags (GstAlsaMixer * mixer) |
|
806 { |
|
807 g_return_val_if_fail (mixer != NULL, GST_MIXER_FLAG_NONE); |
|
808 |
|
809 return GST_MIXER_FLAG_AUTO_NOTIFICATIONS; |
|
810 } |
|
811 |
|
812 static void |
|
813 gst_alsa_mixer_update_option (GstAlsaMixer * mixer, |
|
814 GstAlsaMixerOptions * alsa_opts) |
|
815 { |
|
816 gint ret; |
|
817 guint idx; |
|
818 /* const */ gchar *option; |
|
819 |
|
820 if (mixer->interface == NULL) { |
|
821 GST_WARNING ("Cannot send update notifications, no GstMixer * given"); |
|
822 return; |
|
823 } |
|
824 |
|
825 ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx); |
|
826 if (ret == 0) { |
|
827 option = g_list_nth_data (GST_MIXER_OPTIONS (alsa_opts)->values, idx); |
|
828 gst_mixer_option_changed (mixer->interface, GST_MIXER_OPTIONS (alsa_opts), |
|
829 option); |
|
830 } |
|
831 } |
|
832 |
|
833 static void |
|
834 gst_alsa_mixer_update_track (GstAlsaMixer * mixer, |
|
835 GstAlsaMixerTrack * alsa_track) |
|
836 { |
|
837 GstMixerTrack *track = (GstMixerTrack *) alsa_track; |
|
838 gboolean old_mute; |
|
839 gboolean old_record; |
|
840 gint i, n_channels; |
|
841 gint *old_volumes; |
|
842 |
|
843 GST_DEBUG ("Updating track %" GST_PTR_FORMAT, alsa_track); |
|
844 |
|
845 if (mixer->interface == NULL) { |
|
846 GST_WARNING ("Cannot send update notifications, no GstMixer * given"); |
|
847 return; |
|
848 } |
|
849 |
|
850 old_mute = !!(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE)); |
|
851 old_record = !!(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)); |
|
852 old_volumes = g_new (gint, track->num_channels); |
|
853 n_channels = track->num_channels; |
|
854 memcpy (old_volumes, alsa_track->volumes, |
|
855 sizeof (gint) * track->num_channels); |
|
856 |
|
857 gst_alsa_mixer_track_update (alsa_track); |
|
858 |
|
859 if (old_record != |
|
860 !!(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD))) { |
|
861 gst_mixer_record_toggled (mixer->interface, track, |
|
862 !!GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)); |
|
863 } |
|
864 if (old_mute != !!(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE))) { |
|
865 gst_mixer_mute_toggled (mixer->interface, track, |
|
866 !!GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE)); |
|
867 } |
|
868 |
|
869 n_channels = MIN (n_channels, track->num_channels); |
|
870 for (i = 0; i < n_channels; i++) { |
|
871 if (old_volumes[i] != alsa_track->volumes[i]) { |
|
872 gst_mixer_volume_changed (mixer->interface, track, alsa_track->volumes); |
|
873 break; |
|
874 } |
|
875 } |
|
876 g_free (old_volumes); |
|
877 } |
|
878 |
|
879 /* utility function for gstalsamixerelement to set the interface */ |
|
880 void |
|
881 _gst_alsa_mixer_set_interface (GstAlsaMixer * mixer, GstMixer * interface) |
|
882 { |
|
883 g_return_if_fail (mixer != NULL && mixer->interface == NULL); |
|
884 g_return_if_fail (interface != NULL); |
|
885 |
|
886 mixer->interface = g_object_ref (G_OBJECT (interface)); |
|
887 } |
|