diff options
Diffstat (limited to 'xorg-server/hw/xquartz/quartzAudio.c')
| -rw-r--r-- | xorg-server/hw/xquartz/quartzAudio.c | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/xorg-server/hw/xquartz/quartzAudio.c b/xorg-server/hw/xquartz/quartzAudio.c new file mode 100644 index 000000000..5dee32f54 --- /dev/null +++ b/xorg-server/hw/xquartz/quartzAudio.c @@ -0,0 +1,346 @@ +// +// 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. + */ + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include "quartzCommon.h" +#include "quartzAudio.h" + +#include <CoreAudio/CoreAudio.h> +#include <pthread.h> + +#include "inputstr.h" +#include <X11/extensions/XI.h> +#include <assert.h> + +void NSBeep(void); + +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 %ld\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 %ld\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 %ld\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 %ld\n", status); + return; + } + + // success! + quartzAudioDevice = outputDevice; +} |