JDK14/Java14源码在线阅读
/*
* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
//#define USE_ERROR
//#define USE_TRACE
#include <CoreAudio/CoreAudio.h>
#include <IOKit/audio/IOAudioTypes.h>
#include "PLATFORM_API_MacOSX_Utils.h"
extern "C" {
#include "Ports.h"
}
#if USE_PORTS == TRUE
/* If a device has the only AudioStream in the scope (input or output),
* PortMixer provides a single Port, using the stream kAudioStreamPropertyTerminalType
* property value to determine Port.Type (PORT_GetPortType function).
* If the device has several (more than 1) AudioStreams, there are 2 ways to represent Ports:
* 1. (HALLab-style) single Port which represents all device channels with
* "master volume" and (if number of channel is 2) "master balance"; if AudioDevice
* does not provide "master" controls, implement "virtual master" controls.
* Port.Type is PORT_SRC_UNKNOWN or PORT_DST_UNKNOWN.
* 2. provide a separate Port for every AudioStream (with appropriate Port.Type);
*
* AudioHardware.h claims that AudioStream objects share AudioControl objects with their owning AudioDevice.
* In practice 10.7 OSX drivers (built-in devices, USB audio) implement AudioControl only for AudioDevice.
* For now 1st way is implemented (2nd way can be better if AudioStreams provide AudioControls).
*/
static DeviceList deviceCache;
#define FourCC2Str(n) ((char[5]){(char)(n >> 24), (char)(n >> 16), (char)(n >> 8), (char)(n), 0})
// CoreAudio's AudioControl
struct AudioControl {
AudioObjectID controlID;
AudioClassID classID; // kAudioVolumeControlClassID etc.
AudioObjectPropertyScope scope; // input, output
AudioObjectPropertyElement channel; // master = 0, channels = 1 2 ...
};
// Controls for Java
// PortMixer do all memory management (alloc/free audioControls)
struct PortControl {
enum ControlType {
Volume, // manages single or multiple volume AudioControl
Mute, // manages single or multiple mute AudioControls
Balance // "virtual" control, manages 2 volume AudioControls (only for stereo lines)
};
ControlType type;
int controlCount;
AudioControl **audioControls;
PortControl *next; // to organize PortControl list
};
// represents line (port) for PortMixer
// used for PORT_GetPortCount/PORT_GetPortType/PORT_GetPortName functions
struct PortLine {
AudioObjectPropertyScope scope;
// if the device has several AudioStreams in the scope, streamID == 0
AudioStreamID streamID;
};
struct PortMixer {
AudioDeviceID deviceID;
int portCount;
PortLine ports[2]; // maximum 2 lines - 1 for input & 1 for output
int deviceControlCount; // -1 means "not initialized"
AudioControl *deviceControls;
PortControl *portControls; // list of port controls
bool listenersInstalled;
};
void RemoveChangeListeners(PortMixer *mixer); // forward declaration
OSStatus ChangeListenerProc(AudioObjectID inObjectID, UInt32 inNumberAddresses,
const AudioObjectPropertyAddress inAddresses[], void *inClientData)
{
PortMixer *mixer = (PortMixer *)inClientData;
OSStatus err = noErr;
UInt32 size;
bool invalid = false;
for (UInt32 i = 0; i < inNumberAddresses; i++) {
switch (inAddresses[i].mSelector) {
case kAudioHardwarePropertyDevices:
// check if the device has been removed
err = GetAudioObjectPropertySize(kAudioObjectSystemObject, kAudioObjectPropertyScopeGlobal,
kAudioHardwarePropertyDevices, &size);
if (err == noErr) {
int count = size/sizeof(AudioDeviceID);
AudioDeviceID devices[count];
err = GetAudioObjectProperty(kAudioObjectSystemObject, kAudioObjectPropertyScopeGlobal,
kAudioHardwarePropertyDevices, count*sizeof(AudioDeviceID), devices, 1);
if (err == noErr) {
bool found = false;
for (int j = 0; j < count; j++) {
if (devices[j] == mixer->deviceID) {
found = true;
break;
}
}
if (!found) {
invalid = true;
}
}
}
break;
case kAudioObjectPropertyOwnedObjects:
case kAudioDevicePropertyDeviceHasChanged:
// ensure all _used_ AudioControl are valid
err = GetAudioObjectPropertySize(mixer->deviceID, kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyOwnedObjects, &size);
if (err == noErr) {
int count = size / sizeof(AudioObjectID);
AudioObjectID controlIDs[count];
err = GetAudioObjectProperty(mixer->deviceID, kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyOwnedObjects, count * sizeof(AudioObjectID), &controlIDs, 1);
if (err == noErr) {
for (PortControl *ctrl = mixer->portControls; ctrl != NULL; ctrl = ctrl->next) {
for (int i = 0; i < ctrl->controlCount; i++) {
bool found = false;
for (int j = 0; j < count; j++) {
if (ctrl->audioControls[i]->controlID == controlIDs[j]) {
found = true;
break;
}
}
if (!found) {
invalid = true;
break; // goto next control
}
}
}
}
}
}
}
if (invalid) {
TRACE1("PortMixer (deviceID=0x%x) becomes invalid", (int)mixer->deviceID);
// invalidate all controls
for (int i=0; i<mixer->deviceControlCount; i++) {
mixer->deviceControls[i].controlID = 0;
}
RemoveChangeListeners(mixer);
}
return noErr;
}
const AudioObjectPropertyAddress changeListenersAddresses[] = {
{kAudioHardwarePropertyDevices, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster},
{kAudioObjectPropertyOwnedObjects, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster},
{kAudioDevicePropertyDeviceHasChanged, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster}
};
void AddChangeListeners(PortMixer *mixer) {
if (!mixer->listenersInstalled) {
for (size_t i=0; i<sizeof(changeListenersAddresses)/sizeof(changeListenersAddresses[0]); i++) {
AudioObjectAddPropertyListener(mixer->deviceID, &changeListenersAddresses[i], ChangeListenerProc, mixer);
}
mixer->listenersInstalled = true;
}
}
void RemoveChangeListeners(PortMixer *mixer) {
if (mixer->listenersInstalled) {
for (size_t i=0; i<sizeof(changeListenersAddresses)/sizeof(changeListenersAddresses[0]); i++) {
AudioObjectRemovePropertyListener(mixer->deviceID, &changeListenersAddresses[i], ChangeListenerProc, mixer);
}
mixer->listenersInstalled = false;
}
}
////////////////////////////////////////////////////////////////////////////////
// functions from Port.h
INT32 PORT_GetPortMixerCount() {
deviceCache.Refresh();
int count = deviceCache.GetCount();
TRACE1("<<PORT_GetPortMixerCount = %d\n", count);
return count;
}
INT32 PORT_GetPortMixerDescription(INT32 mixerIndex, PortMixerDescription* mixerDescription) {
bool result = deviceCache.GetDeviceInfo(mixerIndex, NULL, PORT_STRING_LENGTH,
mixerDescription->name, mixerDescription->vendor, mixerDescription->description, mixerDescription->version);
return result ? TRUE : FALSE;
}
void* PORT_Open(INT32 mixerIndex) {
TRACE1("\n>>PORT_Open (mixerIndex=%d)\n", (int)mixerIndex);
PortMixer *mixer = (PortMixer *)calloc(1, sizeof(PortMixer));
mixer->deviceID = deviceCache.GetDeviceID(mixerIndex);
if (mixer->deviceID != 0) {
mixer->deviceControlCount = -1; // not initialized
// fill mixer->ports (and mixer->portCount)
for (int i=0; i<2; i++) {
OSStatus err;
UInt32 size = 0;
AudioObjectPropertyScope scope =
(i == 0) ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput;
err = GetAudioObjectPropertySize(mixer->deviceID, scope, kAudioDevicePropertyStreams, &size);
if (err || size == 0) {
continue;
}
if (size / sizeof(AudioStreamID) == 1) {
// the device has the only AudioStream
AudioStreamID streamID;
err = GetAudioObjectProperty(mixer->deviceID, scope, kAudioDevicePropertyStreams,
sizeof(streamID), &streamID, 1);
if (err) {
continue;
}
mixer->ports[mixer->portCount].streamID = streamID;
} else {
// the device has several AudioStreams in the scope
mixer->ports[mixer->portCount].streamID = 0;
}
mixer->ports[mixer->portCount].scope = scope;
mixer->portCount++;
}
}
TRACE2("<<PORT_Open (mixerIndex=%d) %p\n", mixerIndex, mixer);
return mixer;
}
void PORT_Close(void* id) {
TRACE1(">>PORT_Close %p\n", id);
PortMixer *mixer = (PortMixer *)id;
if (mixer) {
RemoveChangeListeners(mixer);
while (mixer->portControls != NULL) {
PortControl *control2delete = mixer->portControls;
mixer->portControls = control2delete->next;
if (control2delete->audioControls != NULL) {
free(control2delete->audioControls);
}
free(control2delete);
}
if (mixer->deviceControls) {
free(mixer->deviceControls);
}
free(mixer);
}
TRACE1("<<PORT_Close %p\n", mixer);
}
INT32 PORT_GetPortCount(void* id) {
PortMixer *mixer = (PortMixer *)id;
int result = mixer->portCount;
TRACE1("<<PORT_GetPortCount = %d\n", result);
return result;
}
INT32 PORT_GetPortType(void* id, INT32 portIndex) {
PortMixer *mixer = (PortMixer *)id;
INT32 ret = 0;
if (portIndex < 0 || portIndex >= mixer->portCount) {
ERROR1("PORT_GetPortType: line (portIndex = %d) not found\n", portIndex);
return 0;
}
AudioObjectPropertyScope scope = mixer->ports[portIndex].scope;
AudioStreamID streamID = mixer->ports[portIndex].streamID;
if (streamID != 0) {
UInt32 terminalType;
OSStatus err = GetAudioObjectProperty(streamID, kAudioObjectPropertyScopeGlobal,
kAudioStreamPropertyTerminalType, sizeof(terminalType), &terminalType, 1);
if (err) {
OS_ERROR1(err, "PORT_GetPortType(kAudioStreamPropertyTerminalType), portIndex=%d", portIndex);
return 0;
}
// Note that kAudioStreamPropertyTerminalType actually returns values from
// IOAudioTypes.h, not the defined kAudioStreamTerminalType*.
TRACE4("PORT_GetPortType (portIndex=%d), scope=%s, termType=0x%04x (%s)\n",
(int)portIndex, FourCC2Str(scope), (int)terminalType, FourCC2Str(terminalType));
switch (terminalType) {
case INPUT_MICROPHONE:
ret = PORT_SRC_MICROPHONE;
break;
case OUTPUT_SPEAKER:
ret = PORT_DST_SPEAKER;
break;
case OUTPUT_HEADPHONES:
ret = PORT_DST_HEADPHONE;
break;
case EXTERNAL_LINE_CONNECTOR:
ret = scope == kAudioDevicePropertyScopeInput ? PORT_SRC_LINE_IN : PORT_DST_LINE_OUT;
break;
default:
TRACE1(" unknown output terminal type %#x\n", terminalType);
}
} else {
TRACE0(" PORT_GetPortType: multiple streams\n");
}
if (ret == 0) {
// if the type not detected, return "common type"
ret = scope == kAudioDevicePropertyScopeInput ? PORT_SRC_UNKNOWN : PORT_DST_UNKNOWN;
}
TRACE2("<<PORT_GetPortType (portIndex=%d) = %d\n", portIndex, ret);
return ret;
}
INT32 PORT_GetPortName(void* id, INT32 portIndex, char* name, INT32 len) {
PortMixer *mixer = (PortMixer *)id;
name[0] = 0; // for safety
if (portIndex < 0 || portIndex >= mixer->portCount) {
ERROR1("PORT_GetPortName: line (portIndex = %d) not found\n", portIndex);
return FALSE;
}
AudioStreamID streamID = mixer->ports[portIndex].streamID;
CFStringRef cfname = NULL;
if (streamID != 0) {
OSStatus err = GetAudioObjectProperty(streamID, kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyName, sizeof(cfname), &cfname, 1);
if (err && err != kAudioHardwareUnknownPropertyError) {
OS_ERROR1(err, "PORT_GetPortName(stream name), portIndex=%d", portIndex);
return FALSE;
}
}
if (!cfname) {
// use the device's name if the stream has no name (usually the case)
// or the device has several AudioStreams
OSStatus err = GetAudioObjectProperty(mixer->deviceID, kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyName, sizeof(cfname), &cfname, 1);
if (err) {
OS_ERROR1(err, "PORT_GetPortName(device name), portIndex=%d", portIndex);
return FALSE;
}
}
if (cfname) {
CFStringGetCString(cfname, name, len, kCFStringEncodingUTF8);
CFRelease(cfname);
}
TRACE2("<<PORT_GetPortName (portIndex = %d) = %s\n", portIndex, name);
return TRUE;
}
// counts number of valid (non-NULL) elements in the array of AudioControls
static int ValidControlCount(AudioControl **arr, int offset, int len) {
int result = 0;
int end = offset + len;
for (int i=offset; i<end; i++) {
if (arr[i] != NULL)
result++;
}
return result;
}
// returns java control
static void* CreatePortControl(PortMixer *mixer, PortControlCreator *creator, PortControl::ControlType type,
AudioControl **audioControls, int offset, int len) {
void *jControl = NULL;
PortControl *control = (PortControl *)calloc(1, sizeof(PortControl));
if (control == NULL) {
return NULL;
}
float precision = 0.01;
control->type = type;
control->controlCount = len;
control->audioControls = (AudioControl **)malloc(len * sizeof(AudioControl *));
if (control->audioControls == NULL) {
free(control);
return NULL;
}
memcpy(control->audioControls, audioControls + offset, len * sizeof(AudioControl *));
switch (control->type) {
case PortControl::Volume:
jControl = creator->newFloatControl(creator, control, CONTROL_TYPE_VOLUME, 0, 1, precision, "");
break;
case PortControl::Mute:
jControl = creator->newBooleanControl(creator, control, CONTROL_TYPE_MUTE);
break;
case PortControl::Balance:
jControl = creator->newFloatControl(creator, control, CONTROL_TYPE_BALANCE, -1, 1, precision, "");
break;
};
if (jControl == NULL) {
ERROR0("CreatePortControl: javaControl was not created\n");
free(control->audioControls);
free(control);
return NULL;
}
// add the control to mixer control list;
control->next = mixer->portControls;
mixer->portControls = control;
return jControl;
}
void PORT_GetControls(void* id, INT32 portIndex, PortControlCreator* creator) {
PortMixer *mixer = (PortMixer *)id;
TRACE1(">>PORT_GetControls (portIndex = %d)\n", portIndex);
if (portIndex < 0 || portIndex >= mixer->portCount) {
ERROR1("<<PORT_GetControls: line (portIndex = %d) not found\n", portIndex);
return;
}
PortLine *port = &(mixer->ports[portIndex]);
if (mixer->deviceControlCount < 0) { // not initialized
OSStatus err;
UInt32 size;
// deviceControlCount is overestimated
// because we don't actually filter by if the owned objects are controls
err = GetAudioObjectPropertySize(mixer->deviceID, kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyOwnedObjects, &size);
if (err) {
OS_ERROR1(err, "PORT_GetControls (portIndex = %d) get OwnedObject size", portIndex);
} else {
mixer->deviceControlCount = size / sizeof(AudioObjectID);
TRACE1(" PORT_GetControls: detected %d owned objects\n", mixer->deviceControlCount);
AudioObjectID controlIDs[mixer->deviceControlCount];
err = GetAudioObjectProperty(mixer->deviceID, kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyOwnedObjects, sizeof(controlIDs), controlIDs, 1);
if (err) {
OS_ERROR1(err, "PORT_GetControls (portIndex = %d) get OwnedObject values", portIndex);
} else {
mixer->deviceControls = (AudioControl *)calloc(mixer->deviceControlCount, sizeof(AudioControl));
if (mixer->deviceControls == NULL) {
return;
}
for (int i = 0; i < mixer->deviceControlCount; i++) {
AudioControl *control = &mixer->deviceControls[i];
control->controlID = controlIDs[i];
OSStatus err1 = GetAudioObjectProperty(control->controlID, kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyClass, sizeof(control->classID), &control->classID, 1);
OSStatus err2 = GetAudioObjectProperty(control->controlID, kAudioObjectPropertyScopeGlobal,
kAudioControlPropertyScope, sizeof(control->scope), &control->scope, 1);
OSStatus err3 = GetAudioObjectProperty(control->controlID, kAudioObjectPropertyScopeGlobal,
kAudioControlPropertyElement, sizeof(control->channel), &control->channel, 1);
if (err1 || err2 || err3) { // not a control or other error
control->classID = 0;
continue;
}
TRACE4("- control 0x%x, class='%s', scope='%s', channel=%d\n",
control->controlID, FourCC2Str(control->classID), FourCC2Str(control->scope), control->channel);
}
}
}
}
if (mixer->deviceControlCount <= 0) {
TRACE1("<<PORT_GetControls (portIndex = %d): no owned AudioControls\n", portIndex);
return;
}
int totalChannels = GetChannelCount(mixer->deviceID, port->scope == kAudioDevicePropertyScopeOutput ? 1 : 0);
// collect volume and mute controls
AudioControl* volumeControls[totalChannels+1]; // 0 - for master channel
memset(&volumeControls, 0, sizeof(AudioControl *) * (totalChannels+1));
AudioControl* muteControls[totalChannels+1]; // 0 - for master channel
memset(&muteControls, 0, sizeof(AudioControl *) * (totalChannels+1));
for (int i=0; i<mixer->deviceControlCount; i++) {
AudioControl *control = &mixer->deviceControls[i];
if (control->classID == 0 || control->scope != port->scope || control->channel > (unsigned)totalChannels) {
continue;
}
if (control->classID == kAudioVolumeControlClassID) {
if (volumeControls[control->channel] == NULL) {
volumeControls[control->channel] = control;
} else {
ERROR4("WARNING: duplicate VOLUME control 0x%x, class='%s', scope='%s', channel=%d\n",
control->controlID, FourCC2Str(control->classID), FourCC2Str(control->scope), control->channel);
}
} else if (control->classID == kAudioMuteControlClassID) {
if (muteControls[control->channel] == NULL) {
muteControls[control->channel] = control;
} else {
ERROR4("WARNING: duplicate MUTE control 0x%x, class='%s', scope='%s', channel=%d\n",
control->controlID, FourCC2Str(control->classID), FourCC2Str(control->scope), control->channel);
}
} else {
#ifdef USE_ERROR
if (control->classID != 0) {
ERROR4("WARNING: unhandled control 0x%x, class='%s', scope='%s', channel=%d\n",
control->controlID, FourCC2Str(control->classID), FourCC2Str(control->scope), control->channel);
}
#endif
}
}
////////////////////////////////////////////////////////
// create java control hierarchy
void *masterVolume = NULL, *masterMute = NULL, *masterBalance = NULL;
// volumeControls[0] and muteControls[0] - master volume/mute
// volumeControls[n] and muteControls[n] (n=1..totalChannels) - corresponding channel controls
if (volumeControls[0] != NULL) { // "master volume" AudioControl
masterVolume = CreatePortControl(mixer, creator, PortControl::Volume, volumeControls, 0, 1);
} else {
if (ValidControlCount(volumeControls, 1, totalChannels) == totalChannels) {
// every channel has volume control => create virtual master volume
masterVolume = CreatePortControl(mixer, creator, PortControl::Volume, volumeControls, 1, totalChannels);
} else {
TRACE2(" PORT_GetControls (master volume): totalChannels = %d, valid volume controls = %d\n",
totalChannels, ValidControlCount(volumeControls, 1, totalChannels));
}
}
if (muteControls[0] != NULL) { // "master mute"
masterMute = CreatePortControl(mixer, creator, PortControl::Mute, muteControls, 0, 1);
} else {
if (ValidControlCount(muteControls, 1, totalChannels) == totalChannels) {
// every channel has mute control => create virtual master mute control
masterMute = CreatePortControl(mixer, creator, PortControl::Mute, muteControls, 1, totalChannels);
} else {
TRACE2(" PORT_GetControls (master mute): totalChannels = %d, valid volume controls = %d\n",
totalChannels, ValidControlCount(muteControls, 1, totalChannels));
}
}
// virtual balance
if (totalChannels == 2) {
if (ValidControlCount(volumeControls, 1, totalChannels) == totalChannels) {
masterBalance = CreatePortControl(mixer, creator, PortControl::Balance, volumeControls, 1, totalChannels);
} else {
TRACE2(" PORT_GetControls (naster balance): totalChannels = %d, valid volume controls = %d\n",
totalChannels, ValidControlCount(volumeControls, 1, totalChannels));
}
}
// add "master" controls
if (masterVolume != NULL) {
creator->addControl(creator, masterVolume);
}
if (masterBalance != NULL) {
creator->addControl(creator, masterBalance);
}
if (masterMute != NULL) {
creator->addControl(creator, masterMute);
}
// don't add per-channel controls for mono & stereo - they are handled by "master" controls
// TODO: this should be reviewed to handle controls other than mute & volume
if (totalChannels > 2) {
// add separate compound control for each channel (containing volume and mute)
// (ensure that we have controls)
if (ValidControlCount(volumeControls, 1, totalChannels) > 0 || ValidControlCount(muteControls, 1, totalChannels) > 0) {
for (int ch=1; ch<=totalChannels; ch++) {
// get the channel name
char *channelName;
CFStringRef cfname = NULL;
const AudioObjectPropertyAddress address = {kAudioObjectPropertyElementName, port->scope, (unsigned)ch};
UInt32 size = sizeof(cfname);
OSStatus err = AudioObjectGetPropertyData(mixer->deviceID, &address, 0, NULL, &size, &cfname);
if (err == noErr) {
CFIndex length = CFStringGetLength(cfname) + 1;
channelName = (char *)malloc(length);
if (channelName == NULL) {
return;
}
CFStringGetCString(cfname, channelName, length, kCFStringEncodingUTF8);
CFRelease(cfname);
} else {
channelName = (char *)malloc(16);
if (channelName == NULL) {
return;
}
sprintf(channelName, "Ch %d", ch);
}
void* jControls[2];
int controlCount = 0;
if (volumeControls[ch] != NULL) {
jControls[controlCount++] = CreatePortControl(mixer, creator, PortControl::Volume, volumeControls, ch, 1);
}
if (muteControls[ch] != NULL) {
jControls[controlCount++] = CreatePortControl(mixer, creator, PortControl::Mute, muteControls, ch, 1);
}
// TODO: add any extra controls for "other" controls for the channel
void *compoundControl = creator->newCompoundControl(creator, channelName, jControls, controlCount);
creator->addControl(creator, compoundControl);
free(channelName);
}
}
}
AddChangeListeners(mixer);
TRACE1("<<PORT_GetControls (portIndex = %d)\n", portIndex);
}
bool TestPortControlValidity(PortControl *control) {
for (int i=0; i<control->controlCount; i++) {
if (control->audioControls[i]->controlID == 0)
return false;
}
return true;
}
#define DEFAULT_MUTE_VALUE 0
INT32 PORT_GetIntValue(void* controlIDV) {
PortControl *control = (PortControl *)controlIDV;
INT32 result = 0;
switch (control->type) {
case PortControl::Mute:
if (!TestPortControlValidity(control)) {
return DEFAULT_MUTE_VALUE;
}
result = 1; // default is "muted", if some channel in unmuted, then "virtual mute" is also unmuted
for (int i=0; i<control->controlCount; i++) {
UInt32 value;
OSStatus err = GetAudioObjectProperty(control->audioControls[i]->controlID,
kAudioObjectPropertyScopeGlobal, kAudioBooleanControlPropertyValue, sizeof(value), &value, 1);
if (err) {
OS_ERROR3(err, "PORT_GetIntValue, control %d of %d (coltrolID = 0x%x)",
i, control->controlCount, control->audioControls[i]->controlID);
return DEFAULT_MUTE_VALUE;
}
if (value == 0) {
result = 0;
}
}
break;
default:
ERROR1("PORT_GetIntValue requested for non-Int control (control-type == %d)\n", control->type);
return 0;
}
//TRACE1("<<PORT_GetIntValue = %d\n", result);
return result;
}
void PORT_SetIntValue(void* controlIDV, INT32 value) {
//TRACE1("> PORT_SetIntValue = %d\n", value);
PortControl *control = (PortControl *)controlIDV;
if (!TestPortControlValidity(control)) {
return;
}
switch (control->type) {
case PortControl::Mute:
for (int i=0; i<control->controlCount; i++) {
OSStatus err = SetAudioObjectProperty(control->audioControls[i]->controlID,
kAudioObjectPropertyScopeGlobal, kAudioBooleanControlPropertyValue, sizeof(value), &value);
if (err) {
OS_ERROR3(err, "PORT_SetIntValue, control %d of %d (coltrolID = 0x%x)",
i, control->controlCount, control->audioControls[i]->controlID);
// don't return - try to set the rest of AudioControls
}
}
break;
default:
ERROR1("PORT_SetIntValue requested for non-Int control (control-type == %d)\n", control->type);
return;
}
}
// gets volume value for all AudioControls of the PortControl
static bool GetPortControlVolumes(PortControl *control, Float32 *volumes, Float32 *maxVolume) {
*maxVolume = 0.0f;
for (int i=0; i<control->controlCount; i++) {
OSStatus err = GetAudioObjectProperty(control->audioControls[i]->controlID,
kAudioObjectPropertyScopeGlobal, kAudioLevelControlPropertyScalarValue,
sizeof(volumes[i]), &volumes[i], 1);
if (err) {
OS_ERROR3(err, "GetPortControlVolumes, control %d of %d (controlID = 0x%x)",
i, control->controlCount, control->audioControls[i]->controlID);
return false;
}
if (volumes[i] > *maxVolume) {
*maxVolume = volumes[i];
}
}
return true;
}
// sets volume value for all AudioControls of the PortControl
static void SetPortControlVolumes(PortControl *control, Float32 *volumes) {
for (int i=0; i<control->controlCount; i++) {
OSStatus err = SetAudioObjectProperty(control->audioControls[i]->controlID,
kAudioObjectPropertyScopeGlobal, kAudioLevelControlPropertyScalarValue,
sizeof(volumes[i]), &volumes[i]);
if (err) {
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