1 /* ALSA mixer interface 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 Free |
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16 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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17 */ |
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18 |
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19 |
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20 #ifndef __GST_ALSA_MIXER_H__ |
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21 #define __GST_ALSA_MIXER_H__ |
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22 |
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23 |
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24 #include "gstalsa.h" |
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25 |
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26 #include <gst/interfaces/mixer.h> |
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27 #include "gstalsamixeroptions.h" |
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28 #include "gstalsamixertrack.h" |
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29 |
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30 |
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31 G_BEGIN_DECLS |
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32 |
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33 /* This does not get you what you think it does, use obj->mixer */ |
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34 /* #define GST_ALSA_MIXER(obj) ((GstAlsaMixer*)(obj)) */ |
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35 |
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36 typedef struct _GstAlsaMixer GstAlsaMixer; |
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37 |
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38 typedef enum { |
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39 GST_ALSA_MIXER_CAPTURE = 1<<0, |
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40 GST_ALSA_MIXER_PLAYBACK = 1<<1, |
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41 GST_ALSA_MIXER_ALL = GST_ALSA_MIXER_CAPTURE | GST_ALSA_MIXER_PLAYBACK |
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42 } GstAlsaMixerDirection; |
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43 |
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44 /** |
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45 * GstAlsaMixer: |
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46 * |
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47 * Opaque data structure |
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48 */ |
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49 struct _GstAlsaMixer |
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50 { |
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51 GList * tracklist; /* list of available tracks */ |
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52 |
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53 snd_mixer_t * handle; |
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54 |
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55 GstTask * task; |
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56 GStaticRecMutex * task_mutex; |
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57 GStaticRecMutex * rec_mutex; |
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58 |
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59 int pfd[2]; |
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60 |
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61 GstMixer * interface; |
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62 gchar * device; |
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63 gchar * cardname; |
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64 |
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65 GstAlsaMixerDirection dir; |
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66 }; |
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67 |
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68 |
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69 GstAlsaMixer* gst_alsa_mixer_new (const gchar *device, |
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70 GstAlsaMixerDirection dir); |
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71 void gst_alsa_mixer_free (GstAlsaMixer *mixer); |
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72 |
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73 const GList* gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer); |
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74 void gst_alsa_mixer_set_volume (GstAlsaMixer * mixer, |
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75 GstMixerTrack * track, |
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76 gint * volumes); |
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77 void gst_alsa_mixer_get_volume (GstAlsaMixer * mixer, |
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78 GstMixerTrack * track, |
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79 gint * volumes); |
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80 void gst_alsa_mixer_set_record (GstAlsaMixer * mixer, |
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81 GstMixerTrack * track, |
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82 gboolean record); |
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83 void gst_alsa_mixer_set_mute (GstAlsaMixer * mixer, |
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84 GstMixerTrack * track, |
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85 gboolean mute); |
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86 void gst_alsa_mixer_set_option (GstAlsaMixer * mixer, |
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87 GstMixerOptions * opts, |
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88 gchar * value); |
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89 const gchar* gst_alsa_mixer_get_option (GstAlsaMixer * mixer, |
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90 GstMixerOptions * opts); |
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91 void _gst_alsa_mixer_set_interface (GstAlsaMixer * mixer, |
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92 GstMixer * interface); |
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93 GstMixerFlags gst_alsa_mixer_get_mixer_flags (GstAlsaMixer *mixer); |
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94 |
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95 #define GST_IMPLEMENT_ALSA_MIXER_METHODS(Type, interface_as_function) \ |
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96 static gboolean \ |
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97 interface_as_function ## _supported (Type *this, GType iface_type) \ |
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98 { \ |
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99 g_assert (iface_type == GST_TYPE_MIXER); \ |
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100 \ |
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101 return (this->mixer != NULL); \ |
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102 } \ |
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103 \ |
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104 static const GList* \ |
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105 interface_as_function ## _list_tracks (GstMixer * mixer) \ |
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106 { \ |
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107 Type *this = (Type*) mixer; \ |
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108 \ |
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109 g_return_val_if_fail (this != NULL, NULL); \ |
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110 g_return_val_if_fail (this->mixer != NULL, NULL); \ |
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111 \ |
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112 return gst_alsa_mixer_list_tracks (this->mixer); \ |
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113 } \ |
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114 \ |
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115 static void \ |
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116 interface_as_function ## _set_volume (GstMixer * mixer, GstMixerTrack * track, \ |
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117 gint * volumes) \ |
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118 { \ |
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119 Type *this = (Type*) mixer; \ |
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120 \ |
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121 g_return_if_fail (this != NULL); \ |
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122 g_return_if_fail (this->mixer != NULL); \ |
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123 \ |
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124 gst_alsa_mixer_set_volume (this->mixer, track, volumes); \ |
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125 } \ |
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126 \ |
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127 static void \ |
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128 interface_as_function ## _get_volume (GstMixer * mixer, GstMixerTrack * track, \ |
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129 gint * volumes) \ |
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130 { \ |
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131 Type *this = (Type*) mixer; \ |
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132 \ |
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133 g_return_if_fail (this != NULL); \ |
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134 g_return_if_fail (this->mixer != NULL); \ |
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135 \ |
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136 gst_alsa_mixer_get_volume (this->mixer, track, volumes); \ |
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137 } \ |
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138 \ |
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139 static void \ |
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140 interface_as_function ## _set_record (GstMixer * mixer, GstMixerTrack * track, \ |
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141 gboolean record) \ |
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142 { \ |
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143 Type *this = (Type*) mixer; \ |
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144 \ |
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145 g_return_if_fail (this != NULL); \ |
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146 g_return_if_fail (this->mixer != NULL); \ |
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147 \ |
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148 gst_alsa_mixer_set_record (this->mixer, track, record); \ |
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149 } \ |
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150 \ |
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151 static void \ |
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152 interface_as_function ## _set_mute (GstMixer * mixer, GstMixerTrack * track, \ |
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153 gboolean mute) \ |
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154 { \ |
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155 Type *this = (Type*) mixer; \ |
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156 \ |
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157 g_return_if_fail (this != NULL); \ |
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158 g_return_if_fail (this->mixer != NULL); \ |
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159 \ |
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160 gst_alsa_mixer_set_mute (this->mixer, track, mute); \ |
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161 } \ |
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162 \ |
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163 static void \ |
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164 interface_as_function ## _set_option (GstMixer * mixer, GstMixerOptions * opts, \ |
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165 gchar * value) \ |
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166 { \ |
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167 Type *this = (Type*) mixer; \ |
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168 \ |
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169 g_return_if_fail (this != NULL); \ |
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170 g_return_if_fail (this->mixer != NULL); \ |
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171 \ |
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172 gst_alsa_mixer_set_option (this->mixer, opts, value); \ |
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173 } \ |
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174 \ |
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175 static const gchar* \ |
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176 interface_as_function ## _get_option (GstMixer * mixer, GstMixerOptions * opts) \ |
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177 { \ |
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178 Type *this = (Type*) mixer; \ |
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179 \ |
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180 g_return_val_if_fail (this != NULL, NULL); \ |
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181 g_return_val_if_fail (this->mixer != NULL, NULL); \ |
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182 \ |
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183 return gst_alsa_mixer_get_option (this->mixer, opts); \ |
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184 } \ |
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185 \ |
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186 static GstMixerFlags \ |
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187 interface_as_function ## _get_mixer_flags (GstMixer * mixer) \ |
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188 { \ |
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189 Type *this = (Type*) mixer; \ |
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190 \ |
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191 g_return_val_if_fail (this != NULL, GST_MIXER_FLAG_NONE); \ |
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192 g_return_val_if_fail (this->mixer != NULL, GST_MIXER_FLAG_NONE); \ |
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193 \ |
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194 return gst_alsa_mixer_get_mixer_flags (this->mixer); \ |
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195 } \ |
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196 \ |
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197 static void \ |
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198 interface_as_function ## _interface_init (GstMixerClass * klass) \ |
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199 { \ |
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200 GST_MIXER_TYPE (klass) = GST_MIXER_HARDWARE; \ |
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201 \ |
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202 /* set up the interface hooks */ \ |
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203 klass->list_tracks = interface_as_function ## _list_tracks; \ |
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204 klass->set_volume = interface_as_function ## _set_volume; \ |
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205 klass->get_volume = interface_as_function ## _get_volume; \ |
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206 klass->set_mute = interface_as_function ## _set_mute; \ |
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207 klass->set_record = interface_as_function ## _set_record; \ |
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208 klass->set_option = interface_as_function ## _set_option; \ |
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209 klass->get_option = interface_as_function ## _get_option; \ |
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210 klass->get_mixer_flags = interface_as_function ## _get_mixer_flags; \ |
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211 } |
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212 |
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213 |
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214 G_END_DECLS |
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215 |
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216 |
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217 #endif /* __GST_ALSA_MIXER_H__ */ |
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