CvVideoWriter* cvCreateVideoWriter_GStreamer( const char* filename )
{
CvVideoWriter_GStreamer *writer;
unsigned offset = 0;
char *name = icvExtractPattern(filename, &offset);
if(!name)
return 0;
char str[100];
char *x = str;
int size = 100;
while(snprintf(x, size, name, 0) == size - 1) {
size *= 2;
if(x == str)
x = (char *)malloc(size);
else
x = (char *)realloc(x, size);
}
if(!cvHaveImageWriter(x)) {
if(x != str)
free(x);
return 0;
}
if(x != str)
free(x);
writer = (CvVideoWriter_GStreamer *)cvAlloc(sizeof(CvCapture_GStreamer));
memset(writer, 0, sizeof(CvVideoWriter_GStreamer));
writer->filename = strdup(name);
writer->currentframe = offset;
return (CvVideoWriter *)writer;
}
bool CvCapture_Images::open(const char * _filename)
{
unsigned offset = 0;
close();
filename = icvExtractPattern(_filename, &offset);
if(!filename)
return false;
// determine the length of the sequence
length = 0;
char str[_MAX_PATH];
for(;;)
{
sprintf(str, filename, offset + length);
struct stat s;
if(stat(str, &s))
{
if(length == 0 && offset == 0) // allow starting with 0 or 1
{
offset++;
continue;
}
}
if(!cvHaveImageReader(str))
break;
length++;
}
if(length == 0)
{
close();
return false;
}
firstframe = offset;
// grab frame to enable properties retrieval
bool grabRes = grabFrame();
grabbedInOpen = true;
currentframe = 0;
return grabRes;
}
bool CvVideoWriter_Images::open(const char* _filename) {
unsigned offset = 0;
close();
filename = icvExtractPattern(_filename, &offset);
if (!filename) {
return false;
}
char str[_MAX_PATH];
sprintf(str, filename, 0);
if (!cvHaveImageWriter(str)) {
close();
return false;
}
currentframe = offset;
return true;
}
bool CvCapture_Images::open(const char* _filename) {
unsigned offset = 0;
close();
filename = icvExtractPattern(_filename, &offset);
if (!filename) {
return false;
}
// determine the length of the sequence
length = 0;
char str[_MAX_PATH];
for (;;) {
sprintf(str, filename, offset + length);
struct stat s;
if (stat(str, &s)) {
if (length == 0 && offset == 0) { // allow starting with 0 or 1
offset++;
continue;
}
}
if (!cvHaveImageReader(str)) {
break;
}
length++;
}
if (length == 0) {
close();
return false;
}
firstframe = offset;
return true;
}