Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/GStreamerSource.h
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00001 /*
00002 ** Copyright (C) 2012 Nate Bogdanowicz <natezb@gmail.com>
00003 **
00004 ** This program is free software; you can redistribute it and/or modify
00005 ** it under the terms of the GNU General Public License as published by
00006 ** the Free Software Foundation; either version 2 of the License, or
00007 ** (at your option) any later version.
00008 **
00009 ** This program is distributed in the hope that it will be useful,
00010 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 ** GNU General Public License for more details.
00013 **
00014 ** You should have received a copy of the GNU General Public License
00015 ** along with this program; if not, write to the Free Software
00016 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017 */
00018 
00019 #ifndef MARSYAS_GSTREAMERSOURCE_H
00020 #define MARSYAS_GSTREAMERSOURCE_H
00021 
00022 #include "AbsSoundFileSource.h"
00023 #include <sys/stat.h>
00024 
00025 #include <marsyas/common_header.h>
00026 
00027 #include <glib.h>
00028 #include <gst/gst.h>
00029 #include <gst/app/gstappsink.h>
00030 
00031 namespace Marsyas
00032 {
00033 
00041 class GStreamerSource : public AbsSoundFileSource
00042 {
00043 private:
00044   mrs_natural size_, newpos_;
00045   mrs_string filename_, tfilename_;
00046   mrs_bool playing_, pipe_created_;
00047   MarControlPtr ctrl_pos_, ctrl_hasData_, ctrl_lastTickWithData_;
00048 
00049   /* GStreamer Elements */
00050   GstElement *pipe_, *dec_, *sink_;
00051   GstBuffer *buffer_;
00052 
00053   /* These measured in # of SAMPLES per channel */
00054   mrs_natural buffer_left_;
00055   mrs_natural buffer_size_;
00056 
00057   void addControls();
00058   void myUpdate(MarControlPtr sender);
00059   void getHeader(mrs_string filename);
00060   void init_pipeline();
00061   mrs_bool seek();
00062   mrs_bool pull_buffer();
00063   void copyFromBuffer(GstBuffer *buf,
00064                       mrs_natural  buf_start,
00065                       realvec&   vec,
00066                       mrs_natural  vec_start,
00067                       mrs_natural  length);
00068 
00069 public:
00070   GStreamerSource(std::string name);
00071   GStreamerSource(const GStreamerSource& a);
00072   ~GStreamerSource();
00073 
00074   MarSystem* clone() const;
00075   void myProcess(realvec& in,realvec &out);
00076 };
00077 
00078 }//namespace Marsyas
00079 
00080 #endif  // !MARSYAS_GSTREAMERSOURCE_H