// Thread run method
void QuicktimeLiveImageStream::run()
{
ComponentResult result = noErr;
bool done = false;
//memset( data(), 255, 720*250*4);
while (!done)
{
// Do some funky rotational memset
// void * memset ( void * ptr, int value, size_t num );
//memset
// dirty();
if (g_s_use_sg)
{
result = SGIdle(m_gSeqGrabber);
if (result != noErr)
{
OSG_FATAL << "SGIdle : error" << std::endl;
}
}
//OpenThreads::Thread::microSleep(250000); // 25fps (1,000,000 = 1 fps)
//OpenThreads::Thread::microSleep(50000); // 200fps (1,000,000 = 1 fps)
//OpenThreads::Thread::microSleep(25000); // 400fps (1,000,000 = 1 fps)
// Ridiculous
OpenThreads::Thread::microSleep(10000); // 1000fps (1,000,000 = 1 fps)
}
}
//--------------------------------------------------------------------
void ofQuickTimeGrabber::update(){
//---------------------------------
#ifdef OF_VIDEO_CAPTURE_QUICKTIME
//---------------------------------
if (bGrabberInited == true){
SGIdle(gSeqGrabber);
// set the top pixel alpha = 0, so we can know if it
// was a new frame or not..
// or else we will process way more than necessary
// (ie opengl is running at 60fps +, capture at 30fps)
if (bHavePixelsChanged){
#if defined(TARGET_OSX) && defined(__BIG_ENDIAN__)
convertPixels(offscreenGWorldPixels, pixels.getPixels(), width, height);
#endif
}
}
// newness test for quicktime:
if (bGrabberInited == true){
bIsFrameNew = false;
if (bHavePixelsChanged == true){
bIsFrameNew = true;
bHavePixelsChanged = false;
}
}
//---------------------------------
#endif
//---------------------------------
}
static GstFlowReturn
gst_osx_video_src_create (GstPushSrc * src, GstBuffer ** buf)
{
GstOSXVideoSrc *self = GST_OSX_VIDEO_SRC (src);
ComponentResult err;
GstCaps *caps;
//GstClock * clock;
// ###: we need to sleep between calls to SGIdle. originally, the sleeping
// was done using gst_clock_id_wait(), but it turns out that approach
// doesn't work well. it has two issues:
// 1) every so often, gst_clock_id_wait() will block for a much longer
// period of time than requested (upwards of a minute) causing video
// to freeze until it finally returns. this seems to happen once
// every few minutes, which probably means something like 1 in every
// several hundred calls gst_clock_id_wait() does the wrong thing.
// 2) even when the gst_clock approach is working properly, it uses
// quite a bit of cpu in comparison to a simple usleep(). on one
// test machine, using gst_clock_id_wait() caused osxvideosrc to use
// nearly 100% cpu, while using usleep() brough the usage to less
// than 10%.
//
// so, for now, we comment out the gst_clock stuff and use usleep.
//clock = gst_system_clock_obtain ();
do {
err = SGIdle (self->seq_grab);
if (err != noErr) {
GST_ERROR_OBJECT (self, "SGIdle returned %d", (int) err);
gst_object_unref (clock);
return GST_FLOW_UNEXPECTED;
}
if (self->buffer == NULL) {
/*GstClockID clock_id;
clock_id = gst_clock_new_single_shot_id (clock,
(GstClockTime) (gst_clock_get_time(clock) +
(GST_SECOND / ((float)FRAMERATE * 2))));
gst_clock_id_wait (clock_id, NULL);
gst_clock_id_unref (clock_id); */
usleep (1000000 / (FRAMERATE * 2));
}
} while (self->buffer == NULL);
//gst_object_unref (clock);
*buf = self->buffer;
self->buffer = NULL;
caps = gst_pad_get_caps (GST_BASE_SRC_PAD (src));
gst_buffer_set_caps (*buf, caps);
gst_caps_unref (caps);
return GST_FLOW_OK;
}
Boolean QTApp_HandleEvent (EventRecord *theEvent)
{
Boolean myEventHandled = false;
// grant the sequence grabber some processor time
if (gSeqGrabber != NULL)
SGIdle(gSeqGrabber);
return(myEventHandled);
}
void QTApp_Idle (WindowReference theWindow)
{
WindowObject myWindowObject = NULL;
GrafPtr mySavedPort;
GetPort(&mySavedPort);
MacSetPort(QTFrame_GetPortFromWindowReference(theWindow));
myWindowObject = QTFrame_GetWindowObjectFromWindow(theWindow);
if (myWindowObject != NULL) {
MovieController myMC = NULL;
myMC = (**myWindowObject).fController;
if (myMC != NULL) {
// run any idle-time tasks for the movie
#if TARGET_OS_MAC
// restore the cursor to the arrow
// if it's outside the front movie window or outside the window's visible region
if (theWindow == QTFrame_GetFrontMovieWindow()) {
Rect myRect;
Point myPoint;
RgnHandle myVisRegion;
Cursor myArrow;
GetMouse(&myPoint);
myVisRegion = NewRgn();
GetPortVisibleRegion(QTFrame_GetPortFromWindowReference(theWindow), myVisRegion);
GetWindowPortBounds(theWindow, &myRect);
if (!MacPtInRect(myPoint, &myRect) || !PtInRgn(myPoint, myVisRegion))
MacSetCursor(GetQDGlobalsArrow(&myArrow));
DisposeRgn(myVisRegion);
}
#endif // TARGET_OS_MAC
}
}
// grant the sequence grabber some processor time
if (gSeqGrabber != NULL)
SGIdle(gSeqGrabber);
MacSetPort(mySavedPort);
}
/////////////////////////////////////////////////////////
// render
//
/////////////////////////////////////////////////////////
void pix_videoDarwin :: render(GemState *state)
{
OSErr err;
// short frameCount = 0;
// Boolean *done;
if (m_auto || m_banged) {
err = SGIdle(m_sg);
if (err != noErr){
error("SGIdle failed with error %d",err);
m_haveVideo = 0;
} else {
//this doesn't do anything so far
//VDCompressDone(m_vdig,frameCount,data,size,similar,time);
//err = SGGrabFrameComplete(m_vc,frameCount,done);
//if (err != noErr) error("SGGrabCompressComplete failed with error %d",err);
//post("SGGrabFramecomplete done %d framecount = %d",done[0],frameCount);
m_haveVideo = 1;
m_newFrame = 1;
}
if (!m_haveVideo)
{
post("no video yet");
return;
}
// derSwizzler(m_pixBlock.image);
m_pixBlock.newimage = m_newFrame;
state->image = &m_pixBlock;
m_newFrame = 0;
}else {
m_newFrame = 0;
m_pixBlock.newimage = m_newFrame;
state->image = &m_pixBlock;
}
m_banged = false;
}
// ######################################################################
GenericFrame QuickTimeGrabber::Impl::readFrame()
{
if (!itsStreamStarted)
this->startStream();
while (1)
{
itsGotFrame = false;
itsErrorMsg = "";
if (noErr != SGIdle(itsSeqGrab.it))
LFATAL("SGIdle() failed");
if (itsErrorMsg.length() > 0)
{
// some error specific to SGIdle occurred - any errors
// returned from the data proc will also show up here and we
// don't want to write over them
// in QT 4 you would always encounter a cDepthErr error
// after a user drags the window, this failure condition has
// been greatly relaxed in QT 5 it may still occur but
// should only apply to vDigs that really control the screen
// you don't always know where these errors originate from,
// some may come from the VDig...
LFATAL("QuickTimeGrabber error during SGIdle (%s)",
itsErrorMsg.c_str());
// ...to fix this we simply call SGStop and SGStartRecord
// again calling stop allows the SG to release and
// re-prepare for grabbing hopefully fixing any problems,
// this is obviously a very relaxed approach
SGStop(itsSeqGrab.it);
SGStartRecord(itsSeqGrab.it);
}
if (itsGotFrame)
return GenericFrame(itsCurrentImage);
usleep(20000);
}
}
static void v4m_process(MSFilter * obj){
V4lState *s=(V4lState*)obj->data;
uint32_t timestamp;
int cur_frame;
if (s->frame_count==-1){
s->start_time=obj->ticker->time;
s->frame_count=0;
}
if (s->seqgrab!=NULL)
{
SGIdle(s->seqgrab);
}
cur_frame=((obj->ticker->time-s->start_time)*s->fps/1000.0);
if (cur_frame>=s->frame_count){
mblk_t *om=NULL;
ms_mutex_lock(&s->mutex);
/*keep the most recent frame if several frames have been captured */
if (s->seqgrab!=NULL){
om=getq(&s->rq);
}else{
if (s->usemire){
om=dupmsg(v4m_make_mire(s));
}else {
mblk_t *tmpm=v4m_make_nowebcam(s);
if (tmpm) om=dupmsg(tmpm);
}
}
ms_mutex_unlock(&s->mutex);
if (om!=NULL){
timestamp=obj->ticker->time*90;/* rtp uses a 90000 Hz clockrate for video*/
mblk_set_timestamp_info(om,timestamp);
mblk_set_marker_info(om,TRUE);
ms_queue_put(obj->outputs[0],om);
/*ms_message("picture sent");*/
s->frame_count++;
}
}else flushq(&s->rq,0);
}
unsigned char* macsgCamera::getFrame()
{
OSErr result = SGIdle(sg);
if (result != noErr) {
fprintf(stderr, "SGIdle failed\n");
return NULL;
}
switch (colour) {
case false: {
for(int i=0;i<width*height;i++) {
pbuffer[i]=256-buffer[i];
}
break;
}
case true: {
memcpy(pbuffer,buffer,width*height*bytes);
break;
}
}
return pbuffer;
}
//--------------------------------------------------------------------
void ofVideoGrabber::grabFrame(){
//---------------------------------
#ifdef OF_VIDEO_CAPTURE_QUICKTIME
//---------------------------------
if (bGrabberInited == true){
SGIdle(gSeqGrabber);
// set the top pixel alpha = 0, so we can know if it
// was a new frame or not..
// or else we will process way more than necessary
// (ie opengl is running at 60fps +, capture at 30fps)
if (offscreenGWorldPixels[0] != 0x00){
offscreenGWorldPixels[0] = 0x00;
bHavePixelsChanged = true;
convertPixels(offscreenGWorldPixels, pixels, width, height);
if (bUseTexture){
tex.loadData(pixels, width, height, GL_RGB);
}
}
}
// newness test for quicktime:
if (bGrabberInited == true){
bIsFrameNew = false;
if (bHavePixelsChanged == true){
bIsFrameNew = true;
bHavePixelsChanged = false;
}
}
//---------------------------------
#endif
//---------------------------------
//---------------------------------
#ifdef OF_VIDEO_CAPTURE_DIRECTSHOW
//---------------------------------
if (bGrabberInited == true){
bIsFrameNew = false;
if (VI.isFrameNew(device)){
bIsFrameNew = true;
/*
rescale --
currently this is nearest neighbor scaling
not the greatest, but fast
this can be optimized too
with pointers, etc
better --
make sure that you ask for a "good" size....
*/
unsigned char * viPixels = VI.getPixels(device, true, true);
if (bDoWeNeedToResize == true){
int inputW = VI.getWidth(device);
int inputH = VI.getHeight(device);
float scaleW = (float)inputW / (float)width;
float scaleH = (float)inputH / (float)height;
for(int i=0;i<width;i++){
for(int j=0;j<height;j++){
float posx = i * scaleW;
float posy = j * scaleH;
/*
// start of calculating
// for linear interpolation
int xbase = (int)floor(posx);
int xhigh = (int)ceil(posx);
float pctx = (posx - xbase);
int ybase = (int)floor(posy);
int yhigh = (int)ceil(posy);
float pcty = (posy - ybase);
*/
int posPix = (((int)posy * inputW * 3) + ((int)posx * 3));
pixels[(j*width*3) + i*3 ] = viPixels[posPix ];
pixels[(j*width*3) + i*3 + 1] = viPixels[posPix+1];
pixels[(j*width*3) + i*3 + 2] = viPixels[posPix+2];
}
}
} else {
memcpy(pixels, viPixels, width*height*3);
}
if (bUseTexture){
tex.loadData(pixels, width, height, GL_RGB);
}
}
}
//---------------------------------
#endif
//---------------------------------
//---------------------------------
#ifdef OF_VIDEO_CAPTURE_UNICAP
//--------------------------------
if (bGrabberInited){
bIsFrameNew = ucGrabber.getFrameUC(&pixels);
if(bIsFrameNew) {
if (bUseTexture){
tex.loadData(pixels, width, height, GL_RGB);
}
}
}
//---------------------------------
#endif
//---------------------------------
//---------------------------------
#ifdef OF_VIDEO_CAPTURE_GSTREAMER
//--------------------------------
if (bGrabberInited){
gstUtils.update();
bIsFrameNew = gstUtils.isFrameNew();
if(bIsFrameNew) {
if (bUseTexture){
tex.loadData(gstUtils.getPixels(), width, height, GL_RGB);
}
}
}
//---------------------------------
#endif
//---------------------------------
//---------------------------------
#ifdef OF_VIDEO_CAPTURE_V4L
//--------------------------------
if (bV4LGrabberInited == true){
bIsFrameNew = getFrameV4L(pixels);
if(bIsFrameNew) {
if (bUseTexture){
tex.loadData(pixels, width, height, GL_RGB);
}
}
}
//---------------------------------
#endif
//---------------------------------
}
