+++ /dev/null
-//
-// QuartzAudio.m
-//
-// X Window bell support using CoreAudio or AppKit.
-// Greg Parker gparker@cs.stanford.edu 19 Feb 2001
-//
-// Info about sine wave sound playback:
-// CoreAudio code derived from macosx-dev posting by Tim Wood
-// http://www.omnigroup.com/mailman/archive/macosx-dev/2000-May/002004.html
-// Smoothing transitions between sounds
-// http://www.wam.umd.edu/~mphoenix/dss/dss.html
-//
-/*
- * Copyright (c) 2001 Greg Parker. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the name(s) of the above copyright
- * holders shall not be used in advertising or otherwise to promote the sale,
- * use or other dealings in this Software without prior written authorization.
- */
-/* $XFree86: xc/programs/Xserver/hw/darwin/quartz/quartzAudio.c,v 1.1 2002/03/28 02:21:18 torrey Exp $ */
-
-#include "quartz.h"
-#include "quartz-audio.h"
-
-#include <CoreAudio/CoreAudio.h>
-#include <pthread.h>
-
-#include "inputstr.h"
-#include "extensions/XI.h"
-
-void NSBeep();
-
-typedef struct QuartzAudioRec {
- double frequency;
- double amplitude;
-
- UInt32 curFrame;
- UInt32 remainingFrames;
- UInt32 totalFrames;
- UInt32 bytesPerFrame;
- double sampleRate;
- UInt32 fadeLength;
-
- UInt32 bufferByteCount;
- Boolean playing;
- pthread_mutex_t lock;
-
- // used to fade out interrupted sound and avoid 'pop'
- double prevFrequency;
- double prevAmplitude;
- UInt32 prevFrame;
-} QuartzAudioRec;
-
-static AudioDeviceID quartzAudioDevice = kAudioDeviceUnknown;
-static QuartzAudioRec data;
-
-
-/*
- * QuartzAudioEnvelope
- * Fade sound in and out to avoid pop.
- * Sounds with shorter duration will never reach full amplitude. Deal.
- */
-static double QuartzAudioEnvelope(
- UInt32 curFrame,
- UInt32 totalFrames,
- UInt32 fadeLength )
-{
- double fadeFrames = min(fadeLength, totalFrames / 2);
- if (fadeFrames < 1) return 0;
-
- if (curFrame < fadeFrames) {
- return curFrame / fadeFrames;
- } else if (curFrame > totalFrames - fadeFrames) {
- return (totalFrames-curFrame) / fadeFrames;
- } else {
- return 1.0;
- }
-}
-
-
-/*
- * QuartzFillBuffer
- * Fill this buffer with data and update the data position.
- * FIXME: this is ugly
- */
-static void QuartzFillBuffer(
- AudioBuffer *audiobuffer,
- QuartzAudioRec *data )
-{
- float *buffer, *b;
- unsigned int frame, frameCount;
- unsigned int bufferFrameCount;
- float multiplier, v;
- int i;
-
- buffer = (float *)audiobuffer->mData;
- bufferFrameCount = audiobuffer->mDataByteSize / data->bytesPerFrame;
-
- frameCount = min(bufferFrameCount, data->remainingFrames);
-
- // Fade out previous sine wave, if any.
- b = buffer;
- if (data->prevFrame) {
- multiplier = 2*M_PI*(data->prevFrequency/data->sampleRate);
- for (frame = 0; frame < data->fadeLength; frame++) {
- v = data->prevAmplitude *
- QuartzAudioEnvelope(frame+data->fadeLength,
- 2*data->fadeLength,
- data->fadeLength) *
- sin(multiplier * (data->prevFrame+frame));
- for (i = 0; i < audiobuffer->mNumberChannels; i++) {
- *b++ = v;
- }
- }
- // no more prev fade
- data->prevFrame = 0;
-
- // adjust for space eaten by prev fade
- buffer += audiobuffer->mNumberChannels*frame;
- bufferFrameCount -= frame;
- frameCount = min(bufferFrameCount, data->remainingFrames);
- }
-
- // Write a sine wave with the specified frequency and amplitude
- multiplier = 2*M_PI*(data->frequency/data->sampleRate);
- for (frame = 0; frame < frameCount; frame++) {
- v = data->amplitude *
- QuartzAudioEnvelope(data->curFrame+frame, data->totalFrames,
- data->fadeLength) *
- sin(multiplier * (data->curFrame+frame));
- for (i = 0; i < audiobuffer->mNumberChannels; i++) {
- *b++ = v;
- }
- }
-
- // Zero out the rest of the buffer, if any
- memset(b, 0, sizeof(float) * audiobuffer->mNumberChannels *
- (bufferFrameCount-frame));
-
- data->curFrame += frameCount;
- data->remainingFrames -= frameCount;
- if (data->remainingFrames == 0) {
- data->playing = FALSE;
- data->curFrame = 0;
- }
-}
-
-
-/*
- * QuartzAudioIOProc
- * Callback function for audio playback.
- * FIXME: use inOutputTime to correct for skipping
- */
-static OSStatus
-QuartzAudioIOProc(
- AudioDeviceID inDevice,
- const AudioTimeStamp *inNow,
- const AudioBufferList *inInputData,
- const AudioTimeStamp *inInputTime,
- AudioBufferList *outOutputData,
- const AudioTimeStamp *inOutputTime,
- void *inClientData )
-{
- QuartzAudioRec *data = (QuartzAudioRec *)inClientData;
- int i;
- Boolean wasPlaying;
-
- pthread_mutex_lock(&data->lock);
- wasPlaying = data->playing;
- for (i = 0; i < outOutputData->mNumberBuffers; i++) {
- if (data->playing) {
- QuartzFillBuffer(outOutputData->mBuffers+i, data);
- }
- else {
- memset(outOutputData->mBuffers[i].mData, 0,
- outOutputData->mBuffers[i].mDataByteSize);
- }
- }
- if (wasPlaying && !data->playing) {
- OSStatus err;
- err = AudioDeviceStop(inDevice, QuartzAudioIOProc);
- }
- pthread_mutex_unlock(&data->lock);
- return 0;
-}
-
-
-/*
- * QuartzCoreAudioBell
- * Play a tone using the CoreAudio API
- */
-static void QuartzCoreAudioBell(
- int volume, // volume is % of max
- int pitch, // pitch is Hz
- int duration ) // duration is milliseconds
-{
- if (quartzAudioDevice == kAudioDeviceUnknown) return;
-
- pthread_mutex_lock(&data.lock);
-
- // fade previous sound, if any
- data.prevFrequency = data.frequency;
- data.prevAmplitude = data.amplitude;
- data.prevFrame = data.curFrame;
-
- // set new sound
- data.frequency = pitch;
- data.amplitude = volume / 100.0;
- data.curFrame = 0;
- data.totalFrames = (int)(data.sampleRate * duration / 1000.0);
- data.remainingFrames = data.totalFrames;
-
- if (! data.playing) {
- OSStatus status;
- status = AudioDeviceStart(quartzAudioDevice, QuartzAudioIOProc);
- if (status) {
- ErrorF("QuartzAudioBell: AudioDeviceStart returned %d\n", status);
- } else {
- data.playing = TRUE;
- }
- }
- pthread_mutex_unlock(&data.lock);
-}
-
-
-/*
- * QuartzBell
- * Ring the bell
- */
-void QuartzBell(
- int volume, // volume in percent of max
- DeviceIntPtr pDevice,
- pointer ctrl,
- int class )
-{
- int pitch; // pitch in Hz
- int duration; // duration in milliseconds
-
- if (class == BellFeedbackClass) {
- pitch = ((BellCtrl*)ctrl)->pitch;
- duration = ((BellCtrl*)ctrl)->duration;
- } else if (class == KbdFeedbackClass) {
- pitch = ((KeybdCtrl*)ctrl)->bell_pitch;
- duration = ((KeybdCtrl*)ctrl)->bell_duration;
- } else {
- ErrorF("QuartzBell: bad bell class %d\n", class);
- return;
- }
-
- if (quartzUseSysBeep) {
- if (volume)
- NSBeep();
- } else {
- QuartzCoreAudioBell(volume, pitch, duration);
- }
-}
-
-
-/*
- * QuartzAudioInit
- * Prepare to play the bell with the CoreAudio API
- */
-void QuartzAudioInit(void)
-{
- UInt32 propertySize;
- OSStatus status;
- AudioDeviceID outputDevice;
- AudioStreamBasicDescription outputStreamDescription;
- double sampleRate;
-
- // Get the default output device
- propertySize = sizeof(outputDevice);
- status = AudioHardwareGetProperty(
- kAudioHardwarePropertyDefaultOutputDevice,
- &propertySize, &outputDevice);
- if (status) {
- ErrorF("QuartzAudioInit: AudioHardwareGetProperty returned %d\n",
- status);
- return;
- }
- if (outputDevice == kAudioDeviceUnknown) {
- ErrorF("QuartzAudioInit: No audio output devices available.\n");
- return;
- }
-
- // Get the basic device description
- propertySize = sizeof(outputStreamDescription);
- status = AudioDeviceGetProperty(outputDevice, 0, FALSE,
- kAudioDevicePropertyStreamFormat,
- &propertySize, &outputStreamDescription);
- if (status) {
- ErrorF("QuartzAudioInit: GetProperty(stream format) returned %d\n",
- status);
- return;
- }
- sampleRate = outputStreamDescription.mSampleRate;
-
- // Fill in the playback data
- data.frequency = 0;
- data.amplitude = 0;
- data.curFrame = 0;
- data.remainingFrames = 0;
- data.bytesPerFrame = outputStreamDescription.mBytesPerFrame;
- data.sampleRate = sampleRate;
- // data.bufferByteCount = bufferByteCount;
- data.playing = FALSE;
- data.prevAmplitude = 0;
- data.prevFrame = 0;
- data.prevFrequency = 0;
- data.fadeLength = data.sampleRate / 200;
- pthread_mutex_init(&data.lock, NULL); // fixme error check
-
- // fixme assert fadeLength<framesPerBuffer
-
- // Prepare for playback
- status = AudioDeviceAddIOProc(outputDevice, QuartzAudioIOProc, &data);
- if (status) {
- ErrorF("QuartzAudioInit: AddIOProc returned %d\n", status);
- return;
- }
-
- // success!
- quartzAudioDevice = outputDevice;
-}
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