/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../audioOutput.h"
#ifdef HAVE_OSX
#include <AudioUnit/AudioUnit.h>
#include <stdlib.h>
#include <pthread.h>
#include "../log.h"
typedef struct _OsxData {
AudioUnit au;
pthread_mutex_t mutex;
pthread_cond_t condition;
char *buffer;
int bufferSize;
int pos;
int len;
int started;
} OsxData;
static OsxData *newOsxData()
{
OsxData *ret = xmalloc(sizeof(OsxData));
pthread_mutex_init(&ret->mutex, NULL);
pthread_cond_init(&ret->condition, NULL);
ret->pos = 0;
ret->len = 0;
ret->started = 0;
ret->buffer = NULL;
ret->bufferSize = 0;
return ret;
}
static int osx_testDefault()
{
/*AudioUnit au;
ComponentDescription desc;
Component comp;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_Output;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
comp = FindNextComponent(NULL, &desc);
if(!comp) {
ERROR("Unable to open default OS X defice\n");
return -1;
}
if(OpenAComponent(comp, &au) != noErr) {
ERROR("Unable to open default OS X defice\n");
return -1;
}
CloseComponent(au); */
return 0;
}
static int osx_initDriver(AudioOutput * audioOutput, ConfigParam * param)
{
OsxData *od = newOsxData();
audioOutput->data = od;
return 0;
}
static void freeOsxData(OsxData * od)
{
if (od->buffer)
free(od->buffer);
pthread_mutex_destroy(&od->mutex);
pthread_cond_destroy(&od->condition);
free(od);
}
static void osx_finishDriver(AudioOutput * audioOutput)
{
OsxData *od = (OsxData *) audioOutput->data;
freeOsxData(od);
}
static void osx_dropBufferedAudio(AudioOutput * audioOutput)
{
OsxData *od = (OsxData *) audioOutput->data;
pthread_mutex_lock(&od->mutex);
od->len = 0;
pthread_mutex_unlock(&od->mutex);
}
static void osx_closeDevice(AudioOutput * audioOutput)
{
OsxData *od = (OsxData *) audioOutput->data;
pthread_mutex_lock(&od->mutex);
while (od->len) {
pthread_cond_wait(&od->condition, &od->mutex);
}
pthread_mutex_unlock(&od->mutex);
if (od->started) {
AudioOutputUnitStop(od->au);
od->started = 0;
}
CloseComponent(od->au);
AudioUnitUninitialize(od->au);
audioOutput->open = 0;
}
static OSStatus osx_render(void *vdata,
AudioUnitRenderActionFlags * ioActionFlags,
const AudioTimeStamp * inTimeStamp,
UInt32 inBusNumber, UInt32 inNumberFrames,
AudioBufferList * bufferList)
{
OsxData *od = (OsxData *) vdata;
AudioBuffer *buffer = &bufferList->mBuffers[0];
int bufferSize = buffer->mDataByteSize;
int bytesToCopy;
int curpos = 0;
/*DEBUG("osx_render: enter : %i\n", (int)bufferList->mNumberBuffers);
DEBUG("osx_render: ioActionFlags: %p\n", ioActionFlags);
if(ioActionFlags) {
if(*ioActionFlags & kAudioUnitRenderAction_PreRender) {
DEBUG("prerender\n");
}
if(*ioActionFlags & kAudioUnitRenderAction_PostRender) {
DEBUG("post render\n");
}
if(*ioActionFlags & kAudioUnitRenderAction_OutputIsSilence) {
DEBUG("post render\n");
}
if(*ioActionFlags & kAudioOfflineUnitRenderAction_Preflight) {
DEBUG("prefilight\n");
}
if(*ioActionFlags & kAudioOfflineUnitRenderAction_Render) {
DEBUG("render\n");
}
if(*ioActionFlags & kAudioOfflineUnitRenderAction_Complete) {
DEBUG("complete\n");
}
} */
/* while(bufferSize) {
DEBUG("osx_render: lock\n"); */
pthread_mutex_lock(&od->mutex);
/*
DEBUG("%i:%i\n", bufferSize, od->len);
while(od->go && od->len < bufferSize &&
od->len < od->bufferSize)
{
DEBUG("osx_render: wait\n");
pthread_cond_wait(&od->condition, &od->mutex);
}
*/
bytesToCopy = od->len < bufferSize ? od->len : bufferSize;
bufferSize = bytesToCopy;
od->len -= bytesToCopy;
if (od->pos + bytesToCopy > od->bufferSize) {
int bytes = od->bufferSize - od->pos;
memcpy(buffer->mData + curpos, od->buffer + od->pos, bytes);
od->pos = 0;
curpos += bytes;
bytesToCopy -= bytes;
}
memcpy(buffer->mData + curpos, od->buffer + od->pos, bytesToCopy);
od->pos += bytesToCopy;
curpos += bytesToCopy;
if (od->pos >= od->bufferSize)
od->pos = 0;
/* DEBUG("osx_render: unlock\n"); */
pthread_mutex_unlock(&od->mutex);
pthread_cond_signal(&od->condition);
/* } */
buffer->mDataByteSize = bufferSize;
if (!bufferSize) {
my_usleep(1000);
}
/* DEBUG("osx_render: leave\n"); */
return 0;
}
static int osx_openDevice(AudioOutput * audioOutput)
{
OsxData *od = (OsxData *) audioOutput->data;
ComponentDescription desc;
Component comp;
AURenderCallbackStruct callback;
AudioFormat *audioFormat = &audioOutput->outAudioFormat;
AudioStreamBasicDescription streamDesc;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_DefaultOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
comp = FindNextComponent(NULL, &desc);
if (comp == 0) {
ERROR("Error finding OS X component\n");
return -1;
}
if (OpenAComponent(comp, &od->au) != noErr) {
ERROR("Unable to open OS X component\n");
return -1;
}
if (AudioUnitInitialize(od->au) != 0) {
CloseComponent(od->au);
ERROR("Unable to initialize OS X audio unit\n");
return -1;
}
callback.inputProc = osx_render;
callback.inputProcRefCon = od;
if (AudioUnitSetProperty(od->au, kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input, 0,
&callback, sizeof(callback)) != 0) {
AudioUnitUninitialize(od->au);
CloseComponent(od->au);
ERROR("unable to set callback for OS X audio unit\n");
return -1;
}
streamDesc.mSampleRate = audioFormat->sampleRate;
streamDesc.mFormatID = kAudioFormatLinearPCM;
streamDesc.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
#ifdef WORDS_BIGENDIAN
streamDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
#endif
streamDesc.mBytesPerPacket =
audioFormat->channels * audioFormat->bits / 8;
streamDesc.mFramesPerPacket = 1;
streamDesc.mBytesPerFrame = streamDesc.mBytesPerPacket;
streamDesc.mChannelsPerFrame = audioFormat->channels;
streamDesc.mBitsPerChannel = audioFormat->bits;
if (AudioUnitSetProperty(od->au, kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input, 0,
&streamDesc, sizeof(streamDesc)) != 0) {
AudioUnitUninitialize(od->au);
CloseComponent(od->au);
ERROR("Unable to set format on OS X device\n");
return -1;
}
/* create a buffer of 1s */
od->bufferSize = (audioFormat->sampleRate) *
(audioFormat->bits >> 3) * (audioFormat->channels);
od->buffer = xrealloc(od->buffer, od->bufferSize);
od->pos = 0;
od->len = 0;
audioOutput->open = 1;
return 0;
}
static int osx_play(AudioOutput * audioOutput, char *playChunk, int size)
{
OsxData *od = (OsxData *) audioOutput->data;
int bytesToCopy;
int curpos;
/* DEBUG("osx_play: enter\n"); */
if (!od->started) {
int err;
od->started = 1;
err = AudioOutputUnitStart(od->au);
if (err) {
ERROR("unable to start audio output: %i\n", err);
return -1;
}
}
pthread_mutex_lock(&od->mutex);
while (size) {
/* DEBUG("osx_play: lock\n"); */
curpos = od->pos + od->len;
if (curpos >= od->bufferSize)
curpos -= od->bufferSize;
bytesToCopy = od->bufferSize < size ? od->bufferSize : size;
while (od->len > od->bufferSize - bytesToCopy) {
/* DEBUG("osx_play: wait\n"); */
pthread_cond_wait(&od->condition, &od->mutex);
}
bytesToCopy = od->bufferSize - od->len;
bytesToCopy = bytesToCopy < size ? bytesToCopy : size;
size -= bytesToCopy;
od->len += bytesToCopy;
if (curpos + bytesToCopy > od->bufferSize) {
int bytes = od->bufferSize - curpos;
memcpy(od->buffer + curpos, playChunk, bytes);
curpos = 0;
playChunk += bytes;
bytesToCopy -= bytes;
}
memcpy(od->buffer + curpos, playChunk, bytesToCopy);
curpos += bytesToCopy;
playChunk += bytesToCopy;
}
/* DEBUG("osx_play: unlock\n"); */
pthread_mutex_unlock(&od->mutex);
/* DEBUG("osx_play: leave\n"); */
return 0;
}
AudioOutputPlugin osxPlugin = {
"osx",
osx_testDefault,
osx_initDriver,
osx_finishDriver,
osx_openDevice,
osx_play,
osx_dropBufferedAudio,
osx_closeDevice,
NULL, /* sendMetadataFunc */
};
#else
#include <stdio.h>
DISABLED_AUDIO_OUTPUT_PLUGIN(osxPlugin)
#endif
