Dirac - A Video Codec

Created by the British Broadcasting Corporation.


seq_compress.h

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00001 /* ***** BEGIN LICENSE BLOCK *****
00002 *
00003 * $Id: seq_compress.h,v 1.19 2007/09/26 12:18:43 asuraparaju Exp $ $Name: Dirac_0_8_0 $
00004 *
00005 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00006 *
00007 * The contents of this file are subject to the Mozilla Public License
00008 * Version 1.1 (the "License"); you may not use this file except in compliance
00009 * with the License. You may obtain a copy of the License at
00010 * http://www.mozilla.org/MPL/
00011 *
00012 * Software distributed under the License is distributed on an "AS IS" basis,
00013 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
00014 * the specific language governing rights and limitations under the License.
00015 *
00016 * The Original Code is BBC Research and Development code.
00017 *
00018 * The Initial Developer of the Original Code is the British Broadcasting
00019 * Corporation.
00020 * Portions created by the Initial Developer are Copyright (C) 2004.
00021 * All Rights Reserved.
00022 *
00023 * Contributor(s): Thomas Davies (Original Author),
00024 *                 Scott R Ladd,
00025 *                 Anuradha Suraparaju
00026 *                 Andrew Kennedy
00027 *
00028 * Alternatively, the contents of this file may be used under the terms of
00029 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser
00030 * Public License Version 2.1 (the "LGPL"), in which case the provisions of
00031 * the GPL or the LGPL are applicable instead of those above. If you wish to
00032 * allow use of your version of this file only under the terms of the either
00033 * the GPL or LGPL and not to allow others to use your version of this file
00034 * under the MPL, indicate your decision by deleting the provisions above
00035 * and replace them with the notice and other provisions required by the GPL
00036 * or LGPL. If you do not delete the provisions above, a recipient may use
00037 * your version of this file under the terms of any one of the MPL, the GPL
00038 * or the LGPL.
00039 * ***** END LICENSE BLOCK ***** */
00040 
00041 #ifndef _SEQ_COMPRESS_H_
00042 #define _SEQ_COMPRESS_H_
00043 
00045 //-------------------------------------//
00046 //Class to manage compressing sequences//
00047 //-------------------------------------//
00049 
00050 #include <libdirac_byteio/dirac_byte_stream.h>
00051 #include <libdirac_common/common.h>
00052 #include <libdirac_common/frame_buffer.h>
00053 #include <libdirac_common/pic_io.h>
00054 #include <libdirac_common/dirac_assertions.h>
00055 #include <libdirac_encoder/quality_monitor.h>
00056 #include <libdirac_encoder/frame_compress.h>
00057 #include <libdirac_encoder/rate_control.h>
00058 
00059 #include <fstream>
00060 
00061 namespace dirac
00062 {
00063 
00065 
00073     class SequenceCompressor{
00074     public:
00076 
00084         SequenceCompressor(StreamPicInput* pin,
00085                            EncoderParams& encp,
00086                            DiracByteStream& dirac_byte_stream);
00087 
00089 
00092         virtual ~SequenceCompressor();
00093 
00095 
00103         virtual bool LoadNextFrame() = 0;
00104 
00106 
00125         Frame &CompressNextFrame();
00126 
00128         const Frame *GetFrameEncoded();
00129 
00131         const MEData *GetMEData();
00132 
00133         DiracByteStats EndSequence();
00134 
00136 
00141         bool Finished(){return m_all_done;}
00142 
00143 
00144     protected:
00145         void Denoise( Frame& frame );
00146 
00148         void DenoiseComponent( PicArray& pic_data );
00149 
00150         ValueType Median( const ValueType* val_list, const int length);
00151 
00153 
00159         virtual int CodedToDisplay(const int pnum) = 0;
00160 
00162         void MakeSequenceReport();
00163 
00165         virtual const Frame& OriginalFrame(int frame_num)
00166         { return m_mebuffer->GetFrame(frame_num); }
00167 
00169         virtual void CleanBuffers();
00170 
00172         virtual bool IsNewAccessUnit() = 0;
00173 
00175         virtual void RateControlCompress(Frame& my_frame, bool is_a_cut) = 0;
00176 
00178         bool m_all_done;
00179 
00181 
00186         bool m_just_finished;
00187 
00189         SourceParams& m_srcparams;
00190 
00192         EncoderParams& m_encparams;
00193 
00195         StreamPicInput* m_pic_in;
00196 
00198         FrameBuffer* m_fbuffer;
00199 
00201         FrameBuffer* m_mebuffer;
00202 
00203         //state variables for CompressNextFrame
00204 
00206         int m_current_display_fnum;
00207 
00209         int m_current_code_fnum;
00210 
00212         int m_show_fnum;
00213 
00215         int m_last_frame_read;
00216 
00218         int m_delay;
00219 
00221         QualityMonitor m_qmonitor;
00222 
00224         RateController* m_ratecontrol;
00225 
00227         FrameCompressor m_fcoder;
00228 
00230         DiracByteStream& m_dirac_byte_stream;
00231 
00232     private:
00234 
00238         SequenceCompressor(const SequenceCompressor& cpy);
00239 
00241 
00245         SequenceCompressor& operator=(const SequenceCompressor& rhs);
00246 
00247 
00248     };
00249 
00251 
00257     class FrameSequenceCompressor : public SequenceCompressor
00258     {
00259     public:
00261 
00270         FrameSequenceCompressor(StreamPicInput* pin,
00271                            EncoderParams& encp,
00272                            DiracByteStream& dirac_byte_stream);
00273 
00275 
00278         virtual ~FrameSequenceCompressor(){};
00279 
00281 
00287         virtual bool LoadNextFrame();
00288     protected:
00289         virtual int CodedToDisplay(const int pnum);
00290         virtual bool IsNewAccessUnit();
00291         virtual void RateControlCompress(Frame& my_frame, bool is_a_cut);
00292 
00293     };
00294 
00296 
00302     class FieldSequenceCompressor : public SequenceCompressor
00303     {
00304     public:
00306 
00314         FieldSequenceCompressor(StreamPicInput* pin,
00315                            EncoderParams& encp,
00316                            DiracByteStream& dirac_byte_stream);
00317 
00319 
00322         virtual ~FieldSequenceCompressor();
00323 
00325 
00332         virtual bool LoadNextFrame();
00333 
00334     protected:
00335         virtual const Frame& OriginalFrame(int frame_num);
00336 
00337         virtual void CleanBuffers();
00338 
00339         virtual int CodedToDisplay(const int pnum);
00340         virtual bool IsNewAccessUnit();
00341 
00342         virtual void RateControlCompress(Frame& my_frame, bool is_a_cut);
00343     private:
00345 
00349         void PreMotionEstmationFilter (PicArray& comp);
00350 
00352         FrameBuffer* m_origbuffer;
00353 
00354         // Field1 bytes
00355         int m_field1_bytes;
00356         // Field2 bytes
00357         int m_field2_bytes;
00358     };
00359 } // namespace dirac
00360 
00361 #endif

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