cinelerra-5.0/cinelerra/indexstate.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2009 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22
  23 #include "asset.h"
  24 #include "filexml.h"
  25 #include "format.inc"
  26 #include "indexstate.h"
  27 #include "indexstate.inc"
  28 #include "language.h"
  29
  30 #include <stdio.h>
  31
  32
  33 IndexState::IndexState()
  34 {
  35         reset();
  36 }
  37
  38 IndexState::~IndexState()
  39 {
  40         delete [] index_offsets;
  41         delete [] index_sizes;
  42 // Don't delete index buffer since it is shared with the index thread.
  43 }
  44
  45 void IndexState::reset()
  46 {
  47         index_status = INDEX_NOTTESTED;
  48         index_start = old_index_end = index_end = 0;
  49         index_offsets = 0;
  50         index_sizes = 0;
  51         index_zoom = 0;
  52         index_bytes = 0;
  53         index_buffer = 0;
  54         channels = 0;
  55 }
  56
  57 void IndexState::dump()
  58 {
  59         printf("IndexState::dump this=%p\n", this);
  60         printf("    channels=%d index_status=%d index_zoom=" _LD
  61                 " index_bytes=" _LD " index_offsets=%p\n",
  62                 channels, index_status, index_zoom,
  63                 index_bytes, index_offsets);
  64         if(index_sizes)
  65         {
  66                 printf("    index_sizes=");
  67                 for(int i = 0; i < channels; i++)
  68                         printf(_LD " ", index_sizes[i]);
  69                 printf("\n");
  70         }
  71 }
  72
  73 void IndexState::copy_from(IndexState *src)
  74 {
  75         if(this == src) return;
  76
  77         delete [] index_offsets;
  78         delete [] index_sizes;
  79         index_offsets = 0;
  80         index_sizes = 0;
  81
  82 //printf("Asset::update_index 1 %d\n", index_status);
  83         index_status = src->index_status;
  84         index_zoom = src->index_zoom;    // zoom factor of index data
  85         index_start = src->index_start;  // byte start of index data in the index file
  86         index_bytes = src->index_bytes;  // Total bytes in source file for comparison before rebuilding the index
  87         index_end = src->index_end;
  88         old_index_end = src->old_index_end;      // values for index build
  89         channels = src->channels;
  90
  91         if(src->index_offsets)
  92         {
  93                 index_offsets = new int64_t[channels];
  94                 index_sizes = new int64_t[channels];
  95
  96                 int i;
  97                 for(i = 0; i < channels; i++)
  98                 {
  99 // offsets of channels in index file in floats
 100                         index_offsets[i] = src->index_offsets[i];
 101                         index_sizes[i] = src->index_sizes[i];
 102                 }
 103         }
 104
 105 // pointer
 106         index_buffer = src->index_buffer;
 107 }
 108
 109 void IndexState::write_xml(FileXML *file)
 110 {
 111         file->tag.set_title("INDEX");
 112         file->tag.set_property("ZOOM", index_zoom);
 113         file->tag.set_property("BYTES", index_bytes);
 114         file->append_tag();
 115         file->append_newline();
 116
 117         if(index_offsets)
 118         {
 119                 for(int i = 0; i < channels; i++)
 120                 {
 121                         file->tag.set_title("OFFSET");
 122                         file->tag.set_property("FLOAT", index_offsets[i]);
 123                         file->append_tag();
 124                         file->tag.set_title("SIZE");
 125                         file->tag.set_property("FLOAT", index_sizes[i]);
 126                         file->append_tag();
 127                 }
 128         }
 129
 130         file->append_newline();
 131         file->tag.set_title("/INDEX");
 132         file->append_tag();
 133         file->append_newline();
 134 }
 135
 136 void IndexState::read_xml(FileXML *file, int channels)
 137 {
 138         this->channels = channels;
 139
 140         delete [] index_offsets;
 141         delete [] index_sizes;
 142         index_offsets = new int64_t[channels];
 143         index_sizes = new int64_t[channels];
 144
 145         for(int i = 0; i < channels; i++)
 146         {
 147                 index_offsets[i] = 0;
 148                 index_sizes[i] = 0;
 149         }
 150
 151         int current_offset = 0;
 152         int current_size = 0;
 153         int result = 0;
 154
 155         index_zoom = file->tag.get_property("ZOOM", 1);
 156         index_bytes = file->tag.get_property("BYTES", (int64_t)0);
 157
 158         while(!result)
 159         {
 160                 result = file->read_tag();
 161                 if(!result)
 162                 {
 163                         if(file->tag.title_is("/INDEX"))
 164                         {
 165                                 result = 1;
 166                         }
 167                         else
 168                         if(file->tag.title_is("OFFSET"))
 169                         {
 170                                 if(current_offset < channels)
 171                                 {
 172                                         index_offsets[current_offset++] = file->tag.get_property("FLOAT", 0);
 173 //printf("Asset::read_index %d %d\n", current_offset - 1, index_offsets[current_offset - 1]);
 174                                 }
 175                         }
 176                         else
 177                         if(file->tag.title_is("SIZE"))
 178                         {
 179                                 if(current_size < channels)
 180                                 {
 181                                         index_sizes[current_size++] = file->tag.get_property("FLOAT", 0);
 182                                 }
 183                         }
 184                 }
 185         }
 186 }
 187
 188 int IndexState::write_index(const char *path,
 189         int data_bytes,
 190         Asset *asset,
 191         int64_t length_source)
 192 {
 193
 194         FILE *file;
 195         if(!(file = fopen(path, "wb")))
 196         {
 197 // failed to create it
 198                 printf(_("IndexState::write_index Couldn't write index file %s to disk.\n"),
 199                         path);
 200         }
 201         else
 202         {
 203                 FileXML xml;
 204 // Pad index start position
 205                 fwrite((char*)&(index_start), sizeof(int64_t), 1, file);
 206
 207                 index_status = INDEX_READY;
 208
 209 // Write asset encoding information in index file.
 210 // This also calls back into index_state to write it.
 211                 if(asset)
 212                 {
 213                         asset->write(&xml,
 214                                 1,
 215                                 "");
 216                 }
 217                 else
 218                 {
 219 // Must write index_state directly.
 220                         write_xml(&xml);
 221                 }
 222
 223                 xml.write_to_file(file);
 224                 index_start = ftell(file);
 225                 fseek(file, 0, SEEK_SET);
 226 // Write index start
 227                 fwrite((char*)&(index_start), sizeof(int64_t), 1, file);
 228                 fseek(file, index_start, SEEK_SET);
 229
 230 // Write index data
 231                 fwrite(index_buffer,
 232                         data_bytes,
 233                         1,
 234                         file);
 235                 fclose(file);
 236         }
 237
 238 // Force reread of header
 239         index_status = INDEX_NOTTESTED;
 240         index_end = length_source;
 241         old_index_end = 0;
 242         index_start = 0;
 243         return 0;
 244 }
 245
 246 int64_t IndexState::get_index_offset(int channel)
 247 {
 248         return channel < channels && index_offsets ? index_offsets[channel] : 0;
 249 }
 250
 251 int64_t IndexState::get_index_size(int channel)
 252 {
 253         return channel < channels && index_sizes ? index_sizes[channel] : 0;
 254 }
 255
 256