| 1 | /* Copyright (c) 2004-2005, Oracle and/or its affiliates. All rights reserved. |
| 2 | * |
| 3 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 4 | * copy of this software and associated documentation files (the "Software"), |
| 5 | * to deal in the Software without restriction, including without limitation |
| 6 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 7 | * and/or sell copies of the Software, and to permit persons to whom the |
| 8 | * Software is furnished to do so, subject to the following conditions: |
| 9 | * |
| 10 | * The above copyright notice and this permission notice (including the next |
| 11 | * paragraph) shall be included in all copies or substantial portions of the |
| 12 | * Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 19 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 20 | * DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #ifdef HAVE_XORG_CONFIG_H |
| 24 | #include <xorg-config.h> |
| 25 | #endif |
| 26 | |
| 27 | #include <sys/audio.h> |
| 28 | #include <sys/uio.h> |
| 29 | #include <limits.h> |
| 30 | #include <math.h> |
| 31 | #include <poll.h> |
| 32 | |
| 33 | #include "xf86.h" |
| 34 | #include "xf86Priv.h" |
| 35 | #include "xf86_OSlib.h" |
| 36 | |
| 37 | #define BELL_RATE 48000 /* Samples per second */ |
| 38 | #define BELL_HZ 50 /* Fraction of a second i.e. 1/x */ |
| 39 | #define BELL_MS (1000/BELL_HZ) /* MS */ |
| 40 | #define BELL_SAMPLES (BELL_RATE / BELL_HZ) |
| 41 | #define BELL_MIN 3 /* Min # of repeats */ |
| 42 | |
| 43 | #define AUDIO_DEVICE "/dev/audio" |
| 44 | |
| 45 | void |
| 46 | xf86OSRingBell(int loudness, int pitch, int duration) |
| 47 | { |
| 48 | static short samples[BELL_SAMPLES]; |
| 49 | static short silence[BELL_SAMPLES]; /* "The Sound of Silence" */ |
| 50 | static int lastFreq; |
| 51 | int cnt; |
| 52 | int i; |
| 53 | int written; |
| 54 | int repeats; |
| 55 | int freq; |
| 56 | audio_info_t audioInfo; |
| 57 | struct iovec iov[IOV_MAX]; |
| 58 | int iovcnt; |
| 59 | double ampl, cyclen, phase; |
| 60 | int audioFD; |
| 61 | |
| 62 | if ((loudness <= 0) || (pitch <= 0) || (duration <= 0)) { |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | lastFreq = 0; |
| 67 | memset(silence, 0, sizeof(silence)); |
| 68 | |
| 69 | audioFD = open(AUDIO_DEVICE, O_WRONLY | O_NONBLOCK); |
| 70 | if (audioFD == -1) { |
| 71 | xf86Msg(X_ERROR, "Bell: cannot open audio device \"%s\": %s\n", |
| 72 | AUDIO_DEVICE, strerror(errno)); |
| 73 | return; |
| 74 | } |
| 75 | |
| 76 | freq = pitch; |
| 77 | freq = min(freq, (BELL_RATE / 2) - 1); |
| 78 | freq = max(freq, 2 * BELL_HZ); |
| 79 | |
| 80 | /* |
| 81 | * Ensure full waves per buffer |
| 82 | */ |
| 83 | freq -= freq % BELL_HZ; |
| 84 | |
| 85 | if (freq != lastFreq) { |
| 86 | lastFreq = freq; |
| 87 | ampl = 16384.0; |
| 88 | |
| 89 | cyclen = (double) freq / (double) BELL_RATE; |
| 90 | phase = 0.0; |
| 91 | |
| 92 | for (i = 0; i < BELL_SAMPLES; i++) { |
| 93 | samples[i] = (short) (ampl * sin(2.0 * M_PI * phase)); |
| 94 | phase += cyclen; |
| 95 | if (phase >= 1.0) |
| 96 | phase -= 1.0; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | repeats = (duration + (BELL_MS / 2)) / BELL_MS; |
| 101 | repeats = max(repeats, BELL_MIN); |
| 102 | |
| 103 | loudness = max(0, loudness); |
| 104 | loudness = min(loudness, 100); |
| 105 | |
| 106 | #ifdef DEBUG |
| 107 | ErrorF("BELL : freq %d volume %d duration %d repeats %d\n", |
| 108 | freq, loudness, duration, repeats); |
| 109 | #endif |
| 110 | |
| 111 | AUDIO_INITINFO(&audioInfo); |
| 112 | audioInfo.play.encoding = AUDIO_ENCODING_LINEAR; |
| 113 | audioInfo.play.sample_rate = BELL_RATE; |
| 114 | audioInfo.play.channels = 2; |
| 115 | audioInfo.play.precision = 16; |
| 116 | audioInfo.play.gain = min(AUDIO_MAX_GAIN, AUDIO_MAX_GAIN * loudness / 100); |
| 117 | |
| 118 | if (ioctl(audioFD, AUDIO_SETINFO, &audioInfo) < 0) { |
| 119 | xf86Msg(X_ERROR, |
| 120 | "Bell: AUDIO_SETINFO failed on audio device \"%s\": %s\n", |
| 121 | AUDIO_DEVICE, strerror(errno)); |
| 122 | close(audioFD); |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | iovcnt = 0; |
| 127 | |
| 128 | for (cnt = 0; cnt <= repeats; cnt++) { |
| 129 | if (cnt == repeats) { |
| 130 | /* Insert a bit of silence so that multiple beeps are distinct and |
| 131 | * not compressed into a single tone. |
| 132 | */ |
| 133 | iov[iovcnt].iov_base = (char *) silence; |
| 134 | iov[iovcnt++].iov_len = sizeof(silence); |
| 135 | } |
| 136 | else { |
| 137 | iov[iovcnt].iov_base = (char *) samples; |
| 138 | iov[iovcnt++].iov_len = sizeof(samples); |
| 139 | } |
| 140 | if ((iovcnt >= IOV_MAX) || (cnt == repeats)) { |
| 141 | written = writev(audioFD, iov, iovcnt); |
| 142 | |
| 143 | if ((written < ((int) (sizeof(samples) * iovcnt)))) { |
| 144 | /* audio buffer was full! */ |
| 145 | |
| 146 | int naptime; |
| 147 | |
| 148 | if (written == -1) { |
| 149 | if (errno != EAGAIN) { |
| 150 | xf86Msg(X_ERROR, |
| 151 | "Bell: writev failed on audio device \"%s\": %s\n", |
| 152 | AUDIO_DEVICE, strerror(errno)); |
| 153 | close(audioFD); |
| 154 | return; |
| 155 | } |
| 156 | i = iovcnt; |
| 157 | } |
| 158 | else { |
| 159 | i = ((sizeof(samples) * iovcnt) - written) |
| 160 | / sizeof(samples); |
| 161 | } |
| 162 | cnt -= i; |
| 163 | |
| 164 | /* sleep a little to allow audio buffer to drain */ |
| 165 | naptime = BELL_MS * i; |
| 166 | poll(NULL, 0, naptime); |
| 167 | |
| 168 | i = ((sizeof(samples) * iovcnt) - written) % sizeof(samples); |
| 169 | iovcnt = 0; |
| 170 | if ((written != -1) && (i > 0)) { |
| 171 | iov[iovcnt].iov_base = ((char *) samples) + i; |
| 172 | iov[iovcnt++].iov_len = sizeof(samples) - i; |
| 173 | } |
| 174 | } |
| 175 | else { |
| 176 | iovcnt = 0; |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | close(audioFD); |
| 182 | return; |
| 183 | } |