bool TinyAmixerControlValue::writeControl(struct mixer_ctl *mixerControl,
size_t elementCount,
std::string &error)
{
uint32_t elementNumber;
// Write element
// Go through all elements
for (elementNumber = 0; elementNumber < elementCount; elementNumber++) {
int32_t value;
// Read data from blackboard (beware this code is OK on Little Endian machines only)
value = fromBlackboard();
if (isDebugEnabled()) {
info() << "Writing alsa element " << getControlName()
<< ", index " << elementNumber << " with value " << value;
}
// Write element
int err;
if ((err = mixer_ctl_set_value(mixerControl, elementNumber, value)) < 0) {
error = "Failed to write value in mixer control: " + getControlName() + ": " +
strerror(-err);
return false;
}
}
return true;
}
bool TinyAmixerControlValue::readControl(struct mixer_ctl *mixerControl,
size_t elementCount,
std::string &error)
{
uint32_t elementNumber;
// Read element
// Go through all elements
for (elementNumber = 0; elementNumber < elementCount; elementNumber++) {
int32_t value;
if ((value = mixer_ctl_get_value(mixerControl, elementNumber)) < 0) {
error = "Failed to read value in mixer control: " + getControlName();
return false;
}
if (isDebugEnabled()) {
info() << "Reading alsa element " << getControlName()
<< ", index " << elementNumber << " with value " << value;
}
toBlackboard(value);
}
return true;
}
void TinyAmixerControlArray::logControlValues(bool receive,
const void *array,
uint32_t elementCount) const
{
const unsigned char *buffer = reinterpret_cast<const unsigned char *>(array);
unsigned int idx;
std::stringstream log;
log << (receive ? "Reading" : "Writing");
log << " alsa element: " << getControlName() << " with value: ";
displayAndCleanString(log);
for (idx = 0; idx < elementCount; idx++) {
log.width(2);
log.fill('0');
// cast to uint16_t necessary in order to avoid 'buffer[idx]' to be
// treated as a printable character, apparently
log << hex << static_cast<unsigned short>(buffer[idx]) << " ";
if ((idx != 0) && ((idx % maxLogLine) == 0)) {
log << '\n';
displayAndCleanString(log);
}
}
if (log.str().length() > 0) {
log << '\n';
displayAndCleanString(log);
}
log << "[" << dec << elementCount << " bytes]" << endl;
displayAndCleanString(log);
}
QStringList ControllableDeviceList::getControlList() {
QStringList reply;
for (int i=0;i<deviceList.size();i++) {
reply.append(getControlName(i));
}
return reply;
}
ofxWToggle & ofxWFrame::addToggle(const string & title, string controlName, string _style){
controlName=getControlName(controlName,title);
ofxWToggle * toggle = new ofxWToggle(controlName);
toggle->init(title,_style==""?style:_style);
toggle->setPosition(getNextPosition());
addWidget(toggle,controlName);
return *toggle;
}
ofxWButton & ofxWFrame::addButton(const string & title, string controlName, string _style){
controlName=getControlName(controlName,title);
ofxWButton * button = new ofxWButton(controlName);
button->init(title,_style==""?style:_style);
button->setPosition(getNextPosition());
addWidget(button,controlName);
return *button;
}
ofxW2DSlider & ofxWFrame::add2DSlider(const string & title, float xvalue, float yvalue, float xmin, float xmax, float ymin, float ymax, string controlName, const string & _style){
controlName=getControlName(controlName,title);
ofxW2DSlider * slider = new ofxW2DSlider(controlName);
slider->init(title,xvalue,yvalue,xmin,xmax,ymin,ymax,_style==""?style:_style);
slider->setPosition(getNextPosition());
addWidget(slider,controlName);
return *slider;
}
ofxWSpinSlider & ofxWFrame::addSpinSlider(const string & title, float value, float min, float max, float step, string controlName, const string & _style){
controlName=getControlName(controlName,title);
ofxWSpinSlider * slider = new ofxWSpinSlider(controlName);
slider->init(title,value,min,max,step,_style==""?style:_style);
slider->setPosition(getNextPosition());
addWidget(slider,controlName);
return *slider;
}
ofxWTextBox & ofxWFrame::addTextBox(const string & title, string text, string controlName, string _style){
controlName=getControlName(controlName,title);
ofxWTextBox * textBox = new ofxWTextBox(controlName);
textBox->init(title,_style==""?style:_style);
textBox->setPosition(getNextPosition());
textBox->setText(text);
addWidget(textBox,controlName);
return *textBox;
}
bool TinyAmixerControlArray::readControl(struct mixer_ctl *mixerControl,
uint32_t elementCount,
string &error)
{
int err;
if ((err = getArrayMixer(mixerControl, elementCount)) < 0) {
error = "Failed to read value in mixer control: " + getControlName() + ": " +
strerror(-err);
return false;
}
return true;
}
int32_t CamConfig::readControlValue(uint32_t const id) {
std::string control_name;
getControlName(id, &control_name);
LOG_DEBUG("CamConfig: readControlValue %s (%d)", control_name.c_str(), id);
struct v4l2_control control;
memset(&control, 0, sizeof(struct v4l2_control));
control.id = id;
if (0 != ioctl (mFd, VIDIOC_G_CTRL, &control)) {
std::string err_str(strerror(errno));
throw std::runtime_error(err_str.insert(0, "Could not read control object value: "));
}
LOG_DEBUG("Control %s(0x%x(%d)) value: %d", control_name.c_str(), id, id, control.value);
return control.value;
}
ofxWidgetFps & ofxWFrame::addFps(string controlName){
controlName=getControlName(controlName,"fps");
ofxWidgetFps * fps = new ofxWidgetFps(controlName);
/*fps->setEnabledStyle(buttonStyle);
fps->setDisabledStyle(buttonStyle);
fps->setFocusedStyle(buttonFocusedStyle);
fps->setPressedStyle(buttonPressedStyle);
fps->setOutStyle(buttonPressedStyle);*/
fps->setPosition(getNextPosition());
addWidget(fps,controlName);
return *fps;
}
void CamConfig::listControls() {
std::map<uint32_t, struct CamCtrl>::iterator it;
printf("CAMERA CONTROLS\n");
for(it = mCamCtrls.begin(); it != mCamCtrls.end(); it++) {
struct v4l2_queryctrl* pq = &(it->second.mCtrl);
std::string name;
getControlName(it->first, &name);
printf("0x%x(%d): %s, values: %d to %d (step %d), default: %d, current: %d, writeable: %s, readable: %s\n",
pq->id, pq->id, name.c_str(), pq->minimum, pq->maximum, pq->step, pq->default_value, it->second.mValue,
it->second.mWriteable ? "true" : "false", it->second.mReadable ? "true" : "false");
if(it->second.mMenuItems.size() > 0) {
printf("\tMenu-Entries\n");
}
for(unsigned int i=0; i < it->second.mMenuItems.size(); i++) {
printf("\t%d: %s\n", i, it->second.mMenuItems[i].c_str());
}
}
printf("\n");
}
bool LegacyAmixerControl::accessHW(bool receive, string &error)
{
CAutoLog autoLog(getConfigurableElement(), "ALSA", isDebugEnabled());
#ifdef SIMULATION
if (receive) {
memset(getBlackboardLocation(), 0, getSize());
}
log_info("%s ALSA Element Instance: %s\t\t(Control Element: %s)",
receive ? "Reading" : "Writing",
getConfigurableElement()->getPath().c_str(),
getControlName().c_str());
return true;
#endif
int ret;
// Mixer handle
snd_ctl_t *sndCtrl;
uint32_t value;
uint32_t index;
uint32_t elementCount;
snd_ctl_elem_id_t *id;
snd_ctl_elem_info_t *info;
snd_ctl_elem_value_t *control;
logControlInfo(receive);
// Check parameter type is ok (deferred error, no exceptions available :-()
if (!isTypeSupported()) {
error = "Parameter type not supported.";
return false;
}
int cardNumber = getCardNumber();
if (cardNumber < 0) {
error = "Card " + getCardName() + " not found. Error: " + strerror(cardNumber);
return false;
}
#ifdef ANDROID
if ((ret = snd_ctl_hw_open(&sndCtrl, NULL, cardNumber, 0)) < 0) {
error = snd_strerror(ret);
return false;
}
#else
// Create device name
ostringstream deviceName;
deviceName << "hw:" << cardNumber;
// Open sound control
if ((ret = snd_ctl_open(&sndCtrl, deviceName.str().c_str(), 0)) < 0) {
error = snd_strerror(ret);
return false;
}
#endif
// Allocate in stack
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_info_alloca(&info);
snd_ctl_elem_value_alloca(&control);
// Set interface
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
string controlName = getControlName();
// Set name or id
if (isdigit(controlName[0])) {
snd_ctl_elem_id_set_numid(id, asInteger(controlName));
} else {
snd_ctl_elem_id_set_name(id, controlName.c_str());
}
// Init info id
snd_ctl_elem_info_set_id(info, id);
// Get info
if ((ret = snd_ctl_elem_info(sndCtrl, info)) < 0) {
error = "ALSA: Unable to get element info " + controlName +
": " + snd_strerror(ret);
// Close sound control
snd_ctl_close(sndCtrl);
return false;
}
// Get type
snd_ctl_elem_type_t eType = snd_ctl_elem_info_get_type(info);
// Get element count
elementCount = snd_ctl_elem_info_get_count(info);
uint32_t scalarSize = getScalarSize();
// If size defined in the PFW different from alsa mixer control size, return an error
if (elementCount * scalarSize != getSize()) {
error = "ALSA: Control element count (" + asString(elementCount) +
") and configurable scalar element count (" +
asString(getSize() / scalarSize) + ") mismatch";
// Close sound control
snd_ctl_close(sndCtrl);
return false;
}
// Set value id
snd_ctl_elem_value_set_id(control, id);
if (receive) {
// Read element
if ((ret = snd_ctl_elem_read(sndCtrl, control)) < 0) {
error = "ALSA: Unable to read element " + controlName +
": " + snd_strerror(ret);
// Close sound control
snd_ctl_close(sndCtrl);
return false;
}
// Go through all indexes
for (index = 0; index < elementCount; index++) {
switch (eType) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
value = snd_ctl_elem_value_get_boolean(control, index);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
value = snd_ctl_elem_value_get_integer(control, index);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
value = snd_ctl_elem_value_get_integer64(control, index);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
value = snd_ctl_elem_value_get_enumerated(control, index);
break;
case SND_CTL_ELEM_TYPE_BYTES:
value = snd_ctl_elem_value_get_byte(control, index);
break;
default:
error = "ALSA: Unknown control element type while reading alsa element " +
controlName;
return false;
}
if (isDebugEnabled()) {
log_info("Reading alsa element %s, index %u with value %u",
controlName.c_str(), index, value);
}
// Write data to blackboard (beware this code is OK on Little Endian machines only)
toBlackboard(value);
}
} else {
// Go through all indexes
for (index = 0; index < elementCount; index++) {
// Read data from blackboard (beware this code is OK on Little Endian machines only)
value = fromBlackboard();
if (isDebugEnabled()) {
log_info("Writing alsa element %s, index %u with value %u",
controlName.c_str(), index, value);
}
switch (eType) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
snd_ctl_elem_value_set_boolean(control, index, value);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
snd_ctl_elem_value_set_integer(control, index, value);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
snd_ctl_elem_value_set_integer64(control, index, value);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
snd_ctl_elem_value_set_enumerated(control, index, value);
break;
case SND_CTL_ELEM_TYPE_BYTES:
snd_ctl_elem_value_set_byte(control, index, value);
break;
default:
error = "ALSA: Unknown control element type while writing alsa element " +
controlName;
return false;
}
}
// Write element
if ((ret = snd_ctl_elem_write(sndCtrl, control)) < 0) {
error = "ALSA: Unable to write element " + controlName +
": " + snd_strerror(ret);
// Close sound control
snd_ctl_close(sndCtrl);
return false;
}
}
// Close sound control
snd_ctl_close(sndCtrl);
return true;
}
bool TinyAmixerControl::accessHW(bool receive, std::string &error)
{
CAutoLog autoLog(getConfigurableElement(), "ALSA", isDebugEnabled());
// Mixer handle
struct mixer *mixer;
// Mixer control handle
struct mixer_ctl *mixerControl;
uint32_t elementCount;
std::string controlName = getControlName();
// Debug conditionnaly enabled in XML
logControlInfo(receive);
// Check parameter type is ok (deferred error, no exceptions available :-()
if (!isTypeSupported()) {
error = "Parameter type not supported.";
return false;
}
// Check card number
int32_t cardIndex = getCardNumber();
if (cardIndex < 0) {
error = "Card " + getCardName() + " not found. Error: " + strerror(-cardIndex);
return false;
}
// Open alsa mixer
// getMixerHandle is non-const; we need to forcefully remove the constness
// then, we need to cast the generic subsystem into a TinyAlsaSubsystem.
mixer = static_cast<TinyAlsaSubsystem *>(
const_cast<CSubsystem *>(getSubsystem()))->getMixerHandle(cardIndex);
if (!mixer) {
error = "Failed to open mixer for card: " + getCardName();
return false;
}
// Get control handle
if (isdigit(controlName[0])) {
mixerControl = mixer_get_ctl(mixer, asInteger(controlName));
} else {
mixerControl = mixer_get_ctl_by_name(mixer, controlName.c_str());
}
// Check control has been found
if (!mixerControl) {
error = "Failed to open mixer control: " + controlName;
return false;
}
// Get element count
elementCount = getNumValues(mixerControl);
uint32_t scalarSize = getScalarSize();
// Check available size
if (elementCount * scalarSize != getSize()) {
error = "ALSA: Control element count (" + asString(elementCount) +
") and configurable scalar element count (" +
asString(getSize() / scalarSize) + ") mismatch";
return false;
}
// Read/Write element
bool success;
if (receive) {
success = readControl(mixerControl, elementCount, error);
} else {
success = writeControl(mixerControl, elementCount, error);
}
return success;
}
void CamConfig::writeControlValue(uint32_t const id, int32_t value, bool just_write) {
std::string control_name;
getControlName(id, &control_name);
LOG_DEBUG("CamConfig: writeControlValue %s (%d) to %d", control_name.c_str(), id, value);
struct v4l2_control control;
control.id = id;
control.value = value;
// Problem setting control parameter V4L2_CID_WHITE_BALANCE_TEMPERATURE
// on Microsoft LifeCam Cinema(TM), will be ignored.
/* Should be handled by read/write only parameters.
if(id == V4L2_CID_WHITE_BALANCE_TEMPERATURE) {
LOG_WARN("Writing of control V4L2_CID_WHITE_BALANCE_TEMPERATURE is ignored!");
return;
}
*/
std::map<uint32_t, struct CamCtrl>::iterator it;
if(!just_write) {
// Request internally stored control.
it = mCamCtrls.find(id);
// id unknown?
if(it == mCamCtrls.end()) {
throw std::runtime_error("Passed id unknown");
}
// read-only control?
if(!it->second.mWriteable) {
std::stringstream ss;
ss << "Writing is deactivated for control " << control_name << std::endl;
throw std::runtime_error(ss.str().c_str());
}
// Check borders.
if(value < it->second.mCtrl.minimum) {
LOG_INFO("Control %s (%d) value %d set to minimum %d",
control_name.c_str(), id, value, it->second.mCtrl.minimum);
control.value = it->second.mCtrl.minimum;
}
if(value > it->second.mCtrl.maximum) {
LOG_INFO("Control %s (%d) value %d set to maximum %d",
control_name.c_str(), id, value, it->second.mCtrl.maximum);
control.value = it->second.mCtrl.maximum;
}
}
if(0 == ioctl (mFd, VIDIOC_S_CTRL, &control)) {
if(!just_write) {
// Change internally stored value as well.
it->second.mValue = value;
}
LOG_DEBUG("Control value %s (0x%x (%d)) set to %d", control_name.c_str(), id, id, value);
} else {
std::string err_str(strerror(errno));
// ID unknown? Should not happen or data would be out of sync.
if(errno == EINVAL) {
throw CamConfigException(err_str.insert(0,
"VIDIOC_S_CTRL is not supported by device driver: "));
}
// Some controls may only be changed in manual mode. This is not an error.
if(mAutoManualDependentControlIds.find(id) != mAutoManualDependentControlIds.end()) {
LOG_WARN("Control value %s (0x%x (%d)) cannot be changed, auto-mode active?", control_name.c_str(), id, id);
} else {
throw std::runtime_error(err_str.insert(0, "Could not write control object: "));
}
}
}
