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3308
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1 /* Play sound with the ALSA library
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2 Copyright (C) 2006 Jerry James.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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23 /* TODO: Support asynchronous sound playing; see the NAS support in sound.c */
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24
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25 #include <config.h>
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26 #include "lisp.h"
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27 #include "sound.h"
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28 #include "sysfile.h"
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29
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30 /* We can't just include <alsa/asoundlib.h> because it tries to redefine
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31 * several symbols defined by the previous header files.
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32 */
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33 #include <alsa/input.h>
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34 #include <alsa/output.h>
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35 #include <alsa/conf.h>
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36 #include <alsa/global.h>
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37 #include <alsa/pcm.h>
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38 #include <alsa/error.h>
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39 #include <alsa/hwdep.h>
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40 #include <alsa/rawmidi.h>
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41 #include <alsa/control.h>
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42 #include <alsa/mixer.h>
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43
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3335
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44 #define ALSA_VERSION(major,minor,sub) (((major)<<16) | ((minor)<<8)| (sub))
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45
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3308
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46 struct mixer_state
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47 {
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48 snd_mixer_t *mixer;
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49 snd_mixer_elem_t *vol_ctl;
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50
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51 /* Which channels need the old volume restored */
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52 int reset_front_left;
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53 int reset_front_center;
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54 int reset_front_right;
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55 int reset_rear_left;
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3335
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56 int reset_rear_right;
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57 int reset_woofer;
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58 #if SND_LIB_VERSION >= ALSA_VERSION (1, 0, 10)
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3308
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59 int reset_rear_center;
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60 int reset_side_left;
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61 int reset_side_right;
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3335
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62 #endif
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3308
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63
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64 /* Old volumes for the channels */
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65 long front_left_vol;
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66 long front_center_vol;
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67 long front_right_vol;
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68 long rear_left_vol;
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3335
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69 long rear_right_vol;
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70 long woofer_vol;
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71 #if SND_LIB_VERSION >= ALSA_VERSION (1, 0, 10)
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3308
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72 long rear_center_vol;
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73 long side_left_vol;
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74 long side_right_vol;
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3335
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75 #endif
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3308
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76 };
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77
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78 /* Assemble a machine half-word in little-endian order */
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79 #define HALF_LE(arr,start) (arr[start] + (arr[start + 1] << 8))
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80
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81 /* Assemble a machine word in little-endian order */
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82 #define WORD_LE(arr,start) (arr[start] + (arr[start + 1] << 8) + \
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83 (arr[start + 2] << 16) + (arr[start + 3] << 24))
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84
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85 /* Assemble a machine word in big-endian order */
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86 #define WORD_BE(arr,start) ((arr[start] << 24) + (arr[start + 1] << 16) + \
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87 (arr[start + 2] << 8) + arr[start + 3])
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88
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89 /* This function was inspired by miscplay.c.
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90 * Examine sound data to determine its format.
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91 *
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92 * TODO: Detect other formats that ALSA can play, such as GSM and MPEG.
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93 */
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94 static snd_pcm_format_t
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95 analyze_format (const Binbyte *format, int *speed, int *tracks)
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96 {
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97 if (!memcmp (format, "Creative Voice File\x1A\x1A\x00", 22) &&
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98 HALF_LE (format, 22) == ((0x1233 - HALF_LE (format, 24)) & 0xFFFF))
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99 {
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100 /* VOC */
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101 *speed = 8000;
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102 *tracks = 2;
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103 return SND_PCM_FORMAT_U8;
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104 }
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105 else if (!memcmp (format, "RIFF", 4) && !memcmp (format + 8, "WAVEfmt ", 8))
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106 {
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107 /* WAVE */
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108 *speed = WORD_LE (format, 24);
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109 *tracks = format[22];
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110 return format[32] / format[22] == 1
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111 ? SND_PCM_FORMAT_U8
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112 : SND_PCM_FORMAT_S16_LE;
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113 }
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114 else if (!memcmp (format, ".snd", 4))
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115 {
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116 /* Sun/NeXT Audio (big endian) */
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117 if (WORD_BE (format, 4) < 24)
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118 {
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119 *speed = 8000;
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120 *tracks = 1;
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121 return SND_PCM_FORMAT_MU_LAW;
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122 }
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123 *speed = WORD_BE (format, 16);
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124 *tracks = format[23];
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125 if (!memcmp (format + 12, "\000\000\000", 3))
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126 {
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127 switch (format[15])
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128 {
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129 case 1:
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130 case 17:
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131 case 29:
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132 return SND_PCM_FORMAT_MU_LAW;
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133 case 2:
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134 return SND_PCM_FORMAT_S8;
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135 case 3:
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136 return SND_PCM_FORMAT_S16_BE;
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137 case 4:
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138 return SND_PCM_FORMAT_S24_BE;
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139 case 5:
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140 return SND_PCM_FORMAT_S32_BE;
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141 case 23:
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142 case 24:
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143 case 25:
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144 case 26:
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145 return SND_PCM_FORMAT_IMA_ADPCM;
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146 case 27:
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147 return SND_PCM_FORMAT_A_LAW;
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148 default:
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149 break;
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150 }
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151 }
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152 return SND_PCM_FORMAT_UNKNOWN;
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153 }
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154 else if (!memcmp (format, ".sd", 4))
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155 {
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156 /* DEC Audio (little endian) */
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157 if (WORD_LE (format, 4) < 24)
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158 {
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159 *speed = 8000;
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160 *tracks = 1;
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161 return SND_PCM_FORMAT_MU_LAW;
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162 }
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163 *speed = WORD_LE (format, 16);
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164 *tracks = format[20];
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165 if (!memcmp (format + 13, "\000\000\000", 3))
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166 {
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167 switch (format[12])
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168 {
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169 case 1:
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170 case 17:
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171 case 29:
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172 return SND_PCM_FORMAT_MU_LAW;
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173 case 2:
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174 return SND_PCM_FORMAT_S8;
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175 case 3:
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176 return SND_PCM_FORMAT_S16_LE;
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177 case 4:
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178 return SND_PCM_FORMAT_S24_LE;
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179 case 5:
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180 return SND_PCM_FORMAT_S32_LE;
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181 case 23:
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182 case 24:
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183 case 25:
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184 case 26:
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185 return SND_PCM_FORMAT_IMA_ADPCM;
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186 case 27:
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187 return SND_PCM_FORMAT_A_LAW;
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188 default:
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189 break;
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190 }
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191 }
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192 return SND_PCM_FORMAT_UNKNOWN;
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193 }
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194 else
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195 {
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196 /* We don't know what it is. Guess that it is mono audio in unsigned
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197 * byte format. Maybe we should error if we reach this point.
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198 */
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199 *speed = 8000;
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200 *tracks = 1;
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201 return SND_PCM_FORMAT_U8;
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202 }
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203 }
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204
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205 /* Set the volume: if any errors occur, we accept the existing volume */
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206 static void
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207 set_volume (struct mixer_state *mix, int volume)
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208 {
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209 snd_mixer_selem_id_t *volume_id;
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210 long min_vol, max_vol, dev_vol;
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211
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212 if (snd_mixer_open (&mix->mixer, 0) < 0)
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213 return;
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214
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215 if (snd_mixer_attach (mix->mixer, "default") < 0)
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216 return;
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217
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218 if (snd_mixer_selem_register (mix->mixer, NULL, NULL) < 0)
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219 return;
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220
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221 if (snd_mixer_load (mix->mixer) < 0)
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222 return;
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223
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224 snd_mixer_selem_id_alloca (&volume_id);
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225 snd_mixer_selem_id_set_name (volume_id, "PCM");
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226
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227 if ((mix->vol_ctl = snd_mixer_find_selem (mix->mixer, volume_id)) == NULL)
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228 {
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229 snd_mixer_selem_id_set_name (volume_id, "Master");
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230 if ((mix->vol_ctl = snd_mixer_find_selem (mix->mixer, volume_id))
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231 == NULL)
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232 return;
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233 }
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234
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235 /* Translate the Lisp volume range to the device volume range */
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3335
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236 #if SND_LIB_VERSION < ALSA_VERSION (1, 0, 10)
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237 snd_mixer_selem_get_playback_volume_range (mix->vol_ctl, &min_vol, &max_vol);
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238 #else
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3308
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239 if (snd_mixer_selem_get_playback_volume_range (mix->vol_ctl, &min_vol,
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240 &max_vol) < 0)
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241 return;
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3335
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242 #endif
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3308
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243
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244 dev_vol = volume * (max_vol - min_vol) / 100 + min_vol;
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245
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246 /* Record the old volumes */
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247 if (snd_mixer_selem_get_playback_volume
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248 (mix->vol_ctl, SND_MIXER_SCHN_FRONT_LEFT, &mix->front_left_vol) >= 0)
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249 mix->reset_front_left = 1;
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250
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251 if (snd_mixer_selem_get_playback_volume
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252 (mix->vol_ctl, SND_MIXER_SCHN_FRONT_CENTER, &mix->front_center_vol) >= 0)
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253 mix->reset_front_center = 1;
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254
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255 if (snd_mixer_selem_get_playback_volume
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256 (mix->vol_ctl, SND_MIXER_SCHN_FRONT_RIGHT, &mix->front_right_vol) >= 0)
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257 mix->reset_front_right = 1;
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258
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259 if (snd_mixer_selem_get_playback_volume
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260 (mix->vol_ctl, SND_MIXER_SCHN_REAR_LEFT, &mix->rear_left_vol) >= 0)
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261 mix->reset_rear_left = 1;
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262
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263 if (snd_mixer_selem_get_playback_volume
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3335
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264 (mix->vol_ctl, SND_MIXER_SCHN_REAR_RIGHT, &mix->rear_right_vol) >= 0)
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265 mix->reset_rear_right = 1;
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266
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267 if (snd_mixer_selem_get_playback_volume
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268 (mix->vol_ctl, SND_MIXER_SCHN_WOOFER, &mix->woofer_vol) >= 0)
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269 mix->reset_woofer = 1;
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270
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271 #if SND_LIB_VERSION >= ALSA_VERSION (1, 0, 10)
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272 if (snd_mixer_selem_get_playback_volume
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3308
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273 (mix->vol_ctl, SND_MIXER_SCHN_REAR_CENTER, &mix->rear_center_vol) >= 0)
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274 mix->reset_rear_center = 1;
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275
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276 if (snd_mixer_selem_get_playback_volume
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277 (mix->vol_ctl, SND_MIXER_SCHN_SIDE_LEFT, &mix->side_left_vol) >= 0)
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278 mix->reset_side_left = 1;
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279
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280 if (snd_mixer_selem_get_playback_volume
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281 (mix->vol_ctl, SND_MIXER_SCHN_SIDE_RIGHT, &mix->side_right_vol) >= 0)
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282 mix->reset_side_right = 1;
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3335
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283 #endif
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3308
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284
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285 /* Set the volume */
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286 snd_mixer_selem_set_playback_volume_all (mix->vol_ctl, dev_vol);
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287 }
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288
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289 static void
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290 reset_volume (const struct mixer_state *mix)
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291 {
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292 if (mix->reset_front_left)
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293 snd_mixer_selem_set_playback_volume
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294 (mix->vol_ctl, SND_MIXER_SCHN_FRONT_LEFT, mix->front_left_vol);
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295
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296 if (mix->reset_front_center)
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297 snd_mixer_selem_set_playback_volume
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298 (mix->vol_ctl, SND_MIXER_SCHN_FRONT_CENTER, mix->front_center_vol);
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299
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300 if (mix->reset_front_right)
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301 snd_mixer_selem_set_playback_volume
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302 (mix->vol_ctl, SND_MIXER_SCHN_FRONT_RIGHT, mix->front_right_vol);
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303
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304 if (mix->reset_rear_left)
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305 snd_mixer_selem_set_playback_volume
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306 (mix->vol_ctl, SND_MIXER_SCHN_REAR_LEFT, mix->rear_left_vol);
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307
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3335
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308 if (mix->reset_rear_right)
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309 snd_mixer_selem_set_playback_volume
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310 (mix->vol_ctl, SND_MIXER_SCHN_REAR_RIGHT, mix->rear_right_vol);
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311
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312 if (mix->reset_woofer)
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313 snd_mixer_selem_set_playback_volume
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314 (mix->vol_ctl, SND_MIXER_SCHN_WOOFER, mix->woofer_vol);
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315
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316 #if SND_LIB_VERSION >= ALSA_VERSION (1, 0, 10)
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3308
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317 if (mix->reset_rear_center)
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318 snd_mixer_selem_set_playback_volume
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319 (mix->vol_ctl, SND_MIXER_SCHN_REAR_CENTER, mix->rear_center_vol);
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320
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321 if (mix->reset_side_left)
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322 snd_mixer_selem_set_playback_volume
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323 (mix->vol_ctl, SND_MIXER_SCHN_SIDE_LEFT, mix->side_left_vol);
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324
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325 if (mix->reset_side_right)
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326 snd_mixer_selem_set_playback_volume
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327 (mix->vol_ctl, SND_MIXER_SCHN_SIDE_RIGHT, mix->side_right_vol);
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3335
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328 #endif
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3308
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329
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330 snd_mixer_close (mix->mixer);
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331 }
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332
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333 int
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334 alsa_play_sound_data (const Binbyte *data, int length, int volume)
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335 {
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336 snd_pcm_t *pcm_handle;
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337 snd_pcm_hw_params_t *hwparams;
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338 snd_pcm_format_t format;
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339 struct mixer_state mix;
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340 int speed, tracks, err;
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341
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342 /* Set the PCM parameters */
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343 if ((err = snd_pcm_open (&pcm_handle, "default", SND_PCM_STREAM_PLAYBACK,
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344 0)) < 0)
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345 goto error_pcm_open;
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346
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347 snd_pcm_hw_params_alloca (&hwparams);
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348
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349 if ((err = snd_pcm_hw_params_any (pcm_handle, hwparams)) < 0)
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350 goto error_pcm;
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351
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352 format = analyze_format (data, &speed, &tracks);
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353
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354 if ((err = snd_pcm_hw_params_set_access (pcm_handle, hwparams,
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355 SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
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356 goto error_pcm;
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357
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358 if ((err = snd_pcm_hw_params_set_format (pcm_handle, hwparams, format)) < 0)
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359 goto error_pcm;
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360
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361 if ((err = snd_pcm_hw_params_set_rate (pcm_handle, hwparams, speed, 0)) < 0)
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362 goto error_pcm;
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363
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364 if ((err = snd_pcm_hw_params_set_channels (pcm_handle, hwparams, tracks))
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365 < 0)
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366 goto error_pcm;
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367
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368 if ((err = snd_pcm_hw_params (pcm_handle, hwparams)) < 0)
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369 goto error_pcm;
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370
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371 /* Set the volume */
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372 memset (&mix, 0, sizeof (mix));
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373 set_volume (&mix, volume);
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374
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375 /* Play the sound */
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376 if ((err = snd_pcm_writei (pcm_handle, data, length)) < 0)
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377 goto error_mixer;
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378
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379 /* Put the volume back the way it used to be */
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380 reset_volume (&mix);
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381
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382 /* Release resources */
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383 snd_pcm_close (pcm_handle);
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384 return 1;
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385
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386 error_mixer:
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387 reset_volume (&mix);
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388 error_pcm:
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389 snd_pcm_close (pcm_handle);
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390 error_pcm_open:
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391 sound_perror (snd_strerror (err));
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392 return 0;
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393 }
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394
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395 /* Read the sound file into an internal buffer, then call
|
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396 * alsa_play_sound_data.
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397 */
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398 int
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399 alsa_play_sound_file (const Extbyte *sound_file, int volume)
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400 {
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401 Binbyte *data;
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402 int fd, retval;
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403 struct stat st;
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404
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405 fd = retry_open (sound_file, O_RDONLY, 0);
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406 if (fd < 0) {
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407 sound_perror (sound_file);
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408 return 0;
|
|
|
409 }
|
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410
|
|
|
411 qxe_fstat (fd, &st);
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|
412 data = xnew_array (Binbyte, st.st_size);
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|
413 retry_read (fd, data, st.st_size);
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|
|
414 retry_close (fd);
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415 retval = alsa_play_sound_data (data, st.st_size, volume);
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|
|
416 xfree (data, Binbyte);
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|
|
417 return retval;
|
|
|
418 }
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