/* called when a new media pipeline is constructed. We can query the
* pipeline and configure our appsrc */
void ReStream::media_configure_feature (GstRTSPMediaFactory * factory, GstRTSPMedia * media, gpointer user_data)
{
try{
GstElement *element, *appsrc;
struct MyContext *ctx = (struct MyContext *)user_data;
element = gst_rtsp_media_get_element (media);
appsrc = gst_bin_get_by_name_recurse_up (GST_BIN (element), "mysrc");
gst_util_set_object_arg (G_OBJECT (appsrc), "format", "time");
g_object_set (G_OBJECT (appsrc), "caps",
gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, "BGR",
"width", G_TYPE_INT, ctx->width,
"height", G_TYPE_INT,ctx->height,
"framerate", GST_TYPE_FRACTION, FPS, 1, NULL),NULL );
//ctx->white = FALSE;
ctx->timestamp = 0;
ctx->buffer = gst_buffer_new_allocate (NULL, ctx->height * ctx->width*3 , NULL);
gst_buffer_map (ctx->buffer, &ctx->map, GST_MAP_WRITE);
/* make sure ther datais freed when the media is gone */
//g_object_set_data_full (G_OBJECT (media), "my-extra-data", ctx, (GDestroyNotify) g_free);
g_signal_connect (appsrc, "need-data", (GCallback)need_data_feature, ctx);
g_signal_connect (media, "unprepared", (GCallback)unprepared_feature, ctx);
if ( ISDEBUG )
cout<<"media prepared_feature\n";
gst_object_unref (appsrc);
gst_object_unref (element);
}
catch(Exception &e){
CommonClass localcommclass;
localcommclass.PrintException("ReStream","CV::media_configure_feature",e);
}
catch(exception &e){
CommonClass localcommclass;
localcommclass.PrintException("ReStream","STD::media_configure_feature",e);
}
}
void ReStream::unprepared_feature (GstRTSPMedia *gstrtspmedia, MyContext* ctx)
{
try{
if ( ISDEBUG )
cout<<"media unprepared_feature "<<endl;
//cvReleaseCapture(&ctx->cap);
gst_buffer_unmap (ctx->buffer, &ctx->map);
gst_buffer_unref(ctx->buffer);
if ( ISDEBUG )
cout<<"Successfully released buffers";
}
catch(Exception &e){
CommonClass localcommclass;
localcommclass.PrintException("ReStream","CV::unprepared_feature",e);
}
catch(exception &e){
CommonClass localcommclass;
localcommclass.PrintException("ReStream","STD::unprepared_feature",e);
}
}
void ReStream::need_data_feature (GstElement * appsrc, guint unused, gpointer user_data)
{
try{
struct MyContext* ctx = (struct MyContext*)user_data;
if(ctx==NULL){
cout<<"ctx is NUll";
return;
}
else
if ( ISDEBUG )
cout<<"buffer size"<<gst_buffer_get_size( ctx->buffer );
guint size,depth,height,width,step,channels;
GstFlowReturn ret;
IplImage* img = cvCreateImage(cvSize(ctx->width,ctx->height),IPL_DEPTH_8U,3);
guchar *data1;
CvRect rect;
rect.width = ctx->width;
rect.height = ctx->height;
rect.x = 0;
rect.y = 0;
pthread_mutex_lock(&ctx->imgLock);
while(ctx->image == NULL){
if ( ISDEBUG )
cout<<"inside lock ! ImgBuffer is Empty. Please push images.\n";
}
cvSetImageROI( ctx->image, rect );
cvCopy(ctx->image, img );
cvResetImageROI(ctx->image);
if ( ISDEBUG )
cout<<"inside lock ! Copying Image to local Buffer.\n";
pthread_mutex_unlock(&ctx->imgLock);
if( img == NULL ){
cout<<"Failed to fetch the image:( \n";
return;
}
else
{
height = img->height;
width = img->width;
step = img->widthStep;
channels = img->nChannels;
depth = img->depth;
data1 = (guchar *)img->imageData;
size = height*width*channels;
memcpy( (guchar *)ctx->map.data, data1, gst_buffer_get_size( ctx->buffer ) );
GST_BUFFER_PTS (ctx->buffer) = ctx->timestamp;
GST_BUFFER_DURATION (ctx->buffer) = gst_util_uint64_scale_int (1, GST_SECOND, FPS);
ctx->timestamp += GST_BUFFER_DURATION (ctx->buffer);
g_signal_emit_by_name (appsrc, "push-buffer", ctx->buffer, &ret);
if (ret != GST_FLOW_OK) {
if ( ISDEBUG )
cout<<"error pushing image\n";
}
else{
if ( ISDEBUG )
cout<<"Successfully pushed\n";
if(img!=NULL)
cvReleaseImage(&img);
}
}
}
catch(Exception &e){
CommonClass localcommclass;
localcommclass.PrintException("ReStream","CV::need_data_feature",e);
}
catch(exception &e){
CommonClass localcommclass;
localcommclass.PrintException("ReStream","STD::need_data_feature",e);
}
}
