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 1.24 2008/06/03 09:57:13 tjdwave Exp $ $Name: Dirac_0_10_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/picture_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/picture_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         const Picture *CompressNextPicture();
00126 
00128         const Picture *GetPictureEncoded();
00129 
00131         const MEData *GetMEData();
00132 
00133         DiracByteStats EndSequence();
00134 
00136 
00141         bool Finished(){return m_all_done;}
00142 
00144         void SignalEOS() { m_eos_signalled = true; }
00145 
00146     protected:
00147 
00149 
00155         virtual int CodedToDisplay(const int pnum) = 0;
00156 
00158         void MakeSequenceReport();
00159 
00161         virtual const Picture& OriginalPicture(int picture_num)
00162         { return m_mebuffer->GetPicture(picture_num); }
00163 
00165         virtual void CleanBuffers();
00166 
00168         virtual bool IsNewAccessUnit() = 0;
00169 
00171         virtual void RateControlCompress(Picture& my_picture, bool is_a_cut) = 0;
00173         bool CanEncode();
00174 
00176         bool m_all_done;
00177 
00179 
00184         bool m_just_finished;
00185 
00187         SourceParams& m_srcparams;
00188 
00190         EncoderParams& m_encparams;
00191 
00193         OLBParams m_basic_olb_params0;
00194         OLBParams m_basic_olb_params1;
00195         OLBParams m_basic_olb_params2;
00196 
00198         StreamPicInput* m_pic_in;
00199 
00201         PictureBuffer* m_fbuffer;
00202 
00204         PictureBuffer* m_mebuffer;
00205 
00206         //state variables for CompressNextPicture
00207 
00209         int m_current_display_pnum;
00210 
00212         int m_current_code_pnum;
00213 
00215         int m_show_pnum;
00216 
00218         int m_last_picture_read;
00219 
00221         int m_delay;
00222 
00224         QualityMonitor m_qmonitor;
00225 
00227         RateController* m_ratecontrol;
00228 
00230         PictureCompressor m_pcoder;
00231 
00233         DiracByteStream& m_dirac_byte_stream;
00234 
00236         bool m_eos_signalled;
00237 
00239         int m_prev_gop_start;
00240 
00241     private:
00243 
00247         SequenceCompressor(const SequenceCompressor& cpy);
00248 
00250 
00254         SequenceCompressor& operator=(const SequenceCompressor& rhs);
00255 
00256 
00257     };
00258 
00260 
00266     class FrameSequenceCompressor : public SequenceCompressor
00267     {
00268     public:
00270 
00279         FrameSequenceCompressor(StreamPicInput* pin,
00280                            EncoderParams& encp,
00281                            DiracByteStream& dirac_byte_stream);
00282 
00284 
00287         virtual ~FrameSequenceCompressor(){};
00288 
00290 
00296         virtual bool LoadNextFrame();
00297     protected:
00298         virtual int CodedToDisplay(const int pnum);
00299         virtual bool IsNewAccessUnit();
00300         virtual void RateControlCompress(Picture& my_picture, bool is_a_cut);
00301 
00302     };
00303 
00305 
00311     class FieldSequenceCompressor : public SequenceCompressor
00312     {
00313     public:
00315 
00323         FieldSequenceCompressor(StreamPicInput* pin,
00324                            EncoderParams& encp,
00325                            DiracByteStream& dirac_byte_stream);
00326 
00328 
00331         virtual ~FieldSequenceCompressor();
00332 
00334 
00341         virtual bool LoadNextFrame();
00342 
00343     protected:
00344         virtual const Picture& OriginalPicture(int picture_num);
00345 
00346         virtual void CleanBuffers();
00347 
00348         virtual int CodedToDisplay(const int pnum);
00349         virtual bool IsNewAccessUnit();
00350 
00351         virtual void RateControlCompress(Picture& my_picture, bool is_a_cut);
00352     private:
00354 
00358         void PreMotionEstmationFilter (PicArray& comp);
00359 
00361         PictureBuffer* m_origbuffer;
00362 
00363         // Field1 bytes
00364         int m_field1_bytes;
00365         // Field2 bytes
00366         int m_field2_bytes;
00367     };
00368 } // namespace dirac
00369 
00370 #endif

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