libvaapi/VaapiContext.h

   1 // VaapiContext.h: VA context abstraction
   2 //
   3 // Copyright (C) 2009, 2010 Free Software Foundation, Inc.
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18 //
  19
  20 #ifndef GNASH_VAAPICONTEXT_H
  21 #define GNASH_VAAPICONTEXT_H
  22
  23
  24 #include <queue>
  25
  26 #include "log.h"
  27 #include "vaapi_common.h"
  28
  29 namespace gnash {
  30
  31 // Forward declarations
  32 class VaapiSurface;
  33
  34 /// VA codec
  35 enum VaapiCodec {
  36     VAAPI_CODEC_UNKNOWN,
  37     VAAPI_CODEC_MPEG2,
  38     VAAPI_CODEC_MPEG4,
  39     VAAPI_CODEC_H264,
  40     VAAPI_CODEC_VC1
  41 };
  42
  43 /// VA context user-data
  44 class VaapiContextData {
  45 public:
  46     virtual ~VaapiContextData()
  47     { /* do nothing */ }
  48 };
  49
  50 /// VA context abstraction
  51 class DSOEXPORT VaapiContext {
  52     typedef boost::shared_ptr<VaapiSurface> VaapiSurfaceSP;
  53
  54     VADisplay                           _display;
  55     VAConfigID                          _config;
  56     VAContextID                         _context;
  57     VaapiCodec                          _codec;
  58     VAProfile                           _profile;
  59     VAEntrypoint                        _entrypoint;
  60     std::queue<VaapiSurfaceSP>          _surfaces;
  61     unsigned int                        _picture_width;
  62     unsigned int                        _picture_height;
  63     std::auto_ptr<VaapiContextData>     _user_data;
  64
  65     bool construct();
  66     void destruct();
  67     bool createContext(unsigned int width, unsigned int height);
  68     void destroyContext();
  69
  70 public:
  71     VaapiContext(VAProfile profile, VAEntrypoint entrypoint);
  72     ~VaapiContext();
  73
  74     /// Initialize VA decoder for the specified picture dimensions
  75     bool initDecoder(unsigned int width, unsigned int height);
  76
  77     /// Return VA context
  78     VAContextID get() const { return _context; }
  79
  80     /// Get a free surface
  81     boost::shared_ptr<VaapiSurface> acquireSurface();
  82
  83     /// Release surface
  84     void releaseSurface(boost::shared_ptr<VaapiSurface> surface);
  85
  86     /// Set user data
  87     void setData(std::auto_ptr<VaapiContextData> user_data) { _user_data = user_data; }
  88
  89     /// Get user data
  90     VaapiContextData *getData() const { return _user_data.get(); }
  91 };
  92
  93 } // gnash namespace
  94
  95 #endif // GNASH_VAAPICONTEXT_H
  96
  97 // local Variables:
  98 // mode: C++
  99 // indent-tabs-mode: nil
 100 // End:
 101
 102