Dirac Video Codec

# 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

© 2004 British Broadcasting Corporation. Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
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