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 1.31 2008/08/27 00:17:11 asuraparaju Exp $ $Name: Dirac_1_0_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_encoder/enc_queue.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 EncPicture *CompressNextPicture();
00126 
00128         virtual void SetPicTypeAndRefs( PictureParams& pparams ) = 0;
00129 
00131         const EncPicture *GetPictureEncoded();
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         void SetMotionParameters();
00150 
00152 
00158         virtual int CodedToDisplay(const int pnum) = 0;
00159 
00161         void MakeSequenceReport();
00162 
00164         virtual void CleanBuffers();
00165 
00167     //Purely virtual. The child class will have to define it.
00168         virtual void UpdateCBRModel(EncPicture& my_picture, const PictureByteIO* picture_byteio) = 0;
00169 
00171         void UpdateIntraPicCBRModel( const PictureParams& , const bool is_a_cut );
00172 
00174         bool CanEncode();
00175 
00177         bool m_all_done;
00178 
00180 
00185         bool m_just_finished;
00186 
00188         OLBParams m_basic_olb_params0;
00189 
00191         OLBParams m_basic_olb_params1;
00192 
00194         OLBParams m_basic_olb_params2;
00195 
00197         OLBParams* m_intra_olbp;
00198 
00200         SourceParams& m_srcparams;
00201 
00203         EncoderParams& m_encparams;
00204 
00206         PicturePredParams& m_predparams;
00207 
00209     int m_L1_sep;
00210 
00212         PictureParams m_pparams;
00213 
00215         StreamPicInput* m_pic_in;
00216 
00218         EncQueue m_enc_pbuffer;
00219 
00220         //state variables for CompressNextPicture
00221 
00223         int m_current_display_pnum;
00224 
00226         int m_current_code_pnum;
00227 
00229         int m_show_pnum;
00230 
00232         int m_last_picture_read;
00233 
00235     int m_gop_start_num;
00236 
00238         int m_delay;
00239 
00241         QualityMonitor m_qmonitor;
00242 
00244         RateController* m_ratecontrol;
00245 
00247         PictureCompressor m_pcoder;
00248 
00250         DiracByteStream& m_dirac_byte_stream;
00251 
00253         bool m_eos_signalled;
00254 
00255     private:
00257 
00261         SequenceCompressor(const SequenceCompressor& cpy);
00262 
00264 
00268         SequenceCompressor& operator=(const SequenceCompressor& rhs);
00269 
00270 
00271     };
00272 
00274 
00280     class FrameSequenceCompressor : public SequenceCompressor
00281     {
00282     public:
00284 
00293         FrameSequenceCompressor(StreamPicInput* pin,
00294                            EncoderParams& encp,
00295                            DiracByteStream& dirac_byte_stream);
00296 
00298 
00301         virtual ~FrameSequenceCompressor(){};
00302 
00304 
00310         virtual bool LoadNextFrame();
00311         
00313         virtual void SetPicTypeAndRefs( PictureParams& pparams );
00314 
00315 protected:
00316         virtual int CodedToDisplay(const int pnum);
00317         virtual void UpdateCBRModel(EncPicture& my_picture, const PictureByteIO* picture_byteio);
00318 
00319     };
00320 
00322 
00328     class FieldSequenceCompressor : public SequenceCompressor
00329     {
00330     public:
00332 
00340         FieldSequenceCompressor(StreamPicInput* pin,
00341                            EncoderParams& encp,
00342                            DiracByteStream& dirac_byte_stream);
00343 
00345 
00348         virtual ~FieldSequenceCompressor();
00349 
00351 
00358         virtual bool LoadNextFrame();
00359 
00360         
00362         virtual void SetPicTypeAndRefs( PictureParams& pparams );
00363 
00364     protected:
00365 
00366         virtual int CodedToDisplay(const int pnum);
00367 
00368         virtual void UpdateCBRModel(EncPicture& my_picture, const PictureByteIO* picture_byteio);
00369     private:
00371 
00375         void PreMotionEstmationFilter (PicArray& comp);
00376 
00377         // Field1 bytes
00378         int m_field1_bytes;
00379         // Field2 bytes
00380         int m_field2_bytes;
00381     };
00382 } // namespace dirac
00383 
00384 #endif

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