void backend_gtk_update_image( gpointer _data, unicap_data_buffer_t *data_buffer, GError **err )
{
unicap_data_buffer_t tmp_buffer;
struct backend_data *data = _data;
int tmp;
if( !data_buffer )
{
g_warning( "update_image: data_buffer == NULL!\n" );
return;
}
if( /* ( data_buffer->format.fourcc != data->format.fourcc ) || */
( data_buffer->format.size.width != data->format.size.width ) ||
( data_buffer->format.size.height != data->format.size.height ) /* || */
/* ( data_buffer->format.bpp != data->format.bpp )*/ )
{
g_warning( "update_image: data_buffer format missmatch\n" );
return;
}
unicap_copy_format( &tmp_buffer.format, &data_buffer->format );
tmp_buffer.format.bpp = 24;
tmp_buffer.format.fourcc = UCIL_FOURCC( 'R', 'G', 'B', '3' );
tmp = ( data->current_buffer + 1 ) % NUM_BUFFERS;
memcpy( &data->fill_times[tmp], &data_buffer->fill_time, sizeof( struct timeval ) );
tmp_buffer.data = data->image_data[tmp];
tmp_buffer.buffer_size = data->format.size.width * data->format.size.height * 3;
if( !data->color_conversion_cb )
{
ucil_convert_buffer( &tmp_buffer, data_buffer );
}
else
{
if( !data->color_conversion_cb( &tmp_buffer, data_buffer, data->color_conversion_data ) )
{
ucil_convert_buffer( &tmp_buffer, data_buffer );
}
}
}
static void new_frame_cb( unicap_event_t event, unicap_handle_t handle, unicap_data_buffer_t *buffer, void *usr_data )
{
ucil_convert_buffer( &yuvbuffer, buffer );
new_data = 1;
}
int main (int argc, char *argv [])
{
unicap_handle_t handle;
unicap_device_t device;
unicap_format_t src_format;
unicap_format_t dest_format;
unicap_data_buffer_t src_buffer;
unicap_data_buffer_t dest_buffer;
unicap_data_buffer_t *returned_buffer;
if (argc != 4) {
fprintf (stderr, "Usage: sender <hostname> <camera name> "
"<interface>\n");
exit (1);
}
// Initialise 0MQ infrastructure
// 1. Set error handler function (to ignore disconnected receivers)
zmq::set_error_handler (error_handler);
// 2. Initialise basic infrastructure for 2 threads
zmq::dispatcher_t dispatcher (2);
// 3. Initialise local locator (to connect to global locator)
zmq::locator_t locator (argv [1]);
// 4. Start one working thread (to send data to receivers)
zmq::poll_thread_t *pt = zmq::poll_thread_t::create (&dispatcher);
// 5. Register one API thread (the application thread - the one that
// is being executed at the moment)
zmq::api_thread_t *api = zmq::api_thread_t::create (&dispatcher, &locator);
// 6. Define an entry point for the messages. The name of the entry point
// is user-defined ("camera name"). Specify that working thread "pt"
// will be used to listen to new connections being created as well as
// to send frames to existing connections.
int e_id = api->create_exchange (argv [2], zmq::scope_global, argv [3],
pt, 1, &pt);
// Open first available video capture device
if (!SUCCESS (unicap_enumerate_devices (NULL, &device, 0))) {
fprintf (stderr, "Could not enumerate devices\n");
exit (1);
}
if (!SUCCESS (unicap_open (&handle, &device))) {
fprintf (stderr, "Failed to open device: %s\n", device.identifier);
exit (1);
}
printf( "Opened video capture device: %s\n", device.identifier );
// Find a suitable video format that we can convert to RGB24
bool conversion_found = false;
int index = 0;
while (SUCCESS (unicap_enumerate_formats (handle, NULL, &src_format,
index))) {
printf ("Trying video format: %s\n", src_format.identifier);
if (ucil_conversion_supported (FOURCC ('R', 'G', 'B', '3'),
src_format.fourcc)) {
conversion_found = true;
break;
}
index++;
}
if (!conversion_found) {
fprintf (stderr, "Could not find a suitable video format\n");
exit (1);
}
src_format.buffer_type = UNICAP_BUFFER_TYPE_USER;
if (!SUCCESS (unicap_set_format (handle, &src_format))) {
fprintf (stderr, "Failed to set video format\n");
exit (1);
}
printf ("Using video format: %s [%dx%d]\n",
src_format.identifier,
src_format.size.width,
src_format.size.height);
// Clone destination format with equal dimensions, but RGB24 colorspace
unicap_copy_format (&dest_format, &src_format);
strcpy (dest_format.identifier, "RGB 24bpp");
dest_format.fourcc = FOURCC ('R', 'G', 'B', '3');
dest_format.bpp = 24;
dest_format.buffer_size = dest_format.size.width *
dest_format.size.height * 3;
// Initialise image buffers
memset (&src_buffer, 0, sizeof (unicap_data_buffer_t));
src_buffer.data = (unsigned char *)malloc (src_format.buffer_size);
src_buffer.buffer_size = src_format.buffer_size;
memset (&dest_buffer, 0, sizeof (unicap_data_buffer_t));
dest_buffer.data = (unsigned char *)malloc (dest_format.buffer_size);
dest_buffer.buffer_size = dest_format.buffer_size;
dest_buffer.format = dest_format;
// Start video capture
if (!SUCCESS (unicap_start_capture (handle))) {
fprintf (stderr, "Failed to start capture on device: %s\n",
device.identifier);
exit (1);
}
// Loop, sending video to defined exchange
while (1) {
// Queue buffer for video capture
if (!SUCCESS (unicap_queue_buffer (handle, &src_buffer))) {
fprintf (stderr, "Failed to queue a buffer on device: %s\n",
device.identifier);
exit (1);
}
// Wait until buffer is ready
if (!SUCCESS (unicap_wait_buffer (handle, &returned_buffer))) {
fprintf (stderr, "Failed to wait for buffer on device: %s\n",
device.identifier);
exit (1);
}
// Convert colorspace
if (!SUCCESS (ucil_convert_buffer (&dest_buffer, &src_buffer))) {
// TODO: This fails sometimes for unknown reasons,
// just skip the frame for now
fprintf (stderr, "Failed to convert video buffer\n");
}
// Create ZMQ message
zmq::message_t msg (dest_format.buffer_size + (2 * sizeof (uint32_t)));
unsigned char *data = (unsigned char *)msg.data();
// Image width in pixels
zmq::put_uint32 (data, (uint32_t)dest_format.size.width);
data += sizeof (uint32_t);
// Image height in pixels
zmq::put_uint32 (data, (uint32_t)dest_format.size.height);
data += sizeof (uint32_t);
// RGB24 image data
memcpy (data, dest_buffer.data, dest_format.buffer_size);
// Send message
api->send (e_id, msg);
}
return 0;
}
