Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / cinelerra / vdevicev4l2jpeg.C

diff --git a/cinelerra-5.1/cinelerra/vdevicev4l2jpeg.C b/cinelerra-5.1/cinelerra/vdevicev4l2jpeg.C
new file mode 100644 (file)
index 0000000..011c937
--- /dev/null
+++ b/cinelerra-5.1/cinelerra/vdevicev4l2jpeg.C
@@ -0,0 +1,132 @@
+
+/*
+ * CINELERRA
+ * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifdef HAVE_VIDEO4LINUX2
+#include "channel.h"
+#include "file.h"
+#include "libmjpeg.h"
+#include "preferences.h"
+#include "recordconfig.h"
+#include "vdevicev4l2jpeg.h"
+#include "vframe.h"
+#include "videodevice.h"
+
+#include <string.h>
+
+VDeviceV4L2JPEG::VDeviceV4L2JPEG(VideoDevice *device)
+ : VDeviceBase(device), DeviceV4L2Base()
+{
+}
+
+VDeviceV4L2JPEG::~VDeviceV4L2JPEG()
+{
+       close_all();
+}
+
+int VDeviceV4L2JPEG::close_all()
+{
+       close_dev();
+       return 0;
+}
+
+int VDeviceV4L2JPEG::open_input()
+{
+       int result = get_sources();
+       return result;
+}
+
+int VDeviceV4L2JPEG::get_best_colormodel(Asset *asset)
+{
+       return BC_COMPRESSED;
+}
+
+int VDeviceV4L2JPEG::has_signal()
+{
+       return !status_dev() ? dev_signal() : 0;
+}
+
+int VDeviceV4L2JPEG::read_buffer(VFrame *frame)
+{
+       int result = 0;
+
+       if(is_opened())
+       {
+               if(device->channel_changed || device->picture_changed)
+                       close_dev();
+       }
+
+       if(!is_opened())
+       {
+               result = open_dev(frame->get_color_model());
+               if( !result )
+               {
+                       device->channel_changed = 0;
+                       device->picture_changed = 0;
+               }
+       }
+
+// Get buffer from thread
+       if( !result )
+       {
+               int bfr = get_buffer();
+               if(bfr >= 0)
+               {
+                       VFrame *buffer = device_buffer(bfr);
+                       frame->set_timestamp(buffer->get_timestamp());
+                       frame->allocate_compressed_data(buffer->get_compressed_size());
+                       frame->set_compressed_size(buffer->get_compressed_size());
+
+// Transfer fields to frame
+                       if(device->odd_field_first)
+                       {
+                               int field2_offset = mjpeg_get_field2((unsigned char*)buffer->get_data(),
+                                       buffer->get_compressed_size());
+                               int field1_len = field2_offset;
+                               int field2_len = buffer->get_compressed_size() -
+                                       field2_offset;
+
+                               memcpy(frame->get_data(),
+                                       buffer->get_data() + field2_offset,
+                                       field2_len);
+                               memcpy(frame->get_data() + field2_len,
+                                       buffer->get_data(),
+                                       field1_len);
+                       }
+                       else
+                       {
+                               bcopy(buffer->get_data(),
+                                       frame->get_data(),
+                                       buffer->get_compressed_size());
+                       }
+
+                       put_buffer(bfr);
+               }
+               else
+                       result = 1;
+       }
+
+       if( result )
+               close_dev();
+
+       return result;
+}
+
+#endif