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anx_import.h

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00001 /*
00002    Copyright (C) 2003 Commonwealth Scientific and Industrial Research
00003    Organisation (CSIRO) Australia
00004 
00005    Redistribution and use in source and binary forms, with or without
00006    modification, are permitted provided that the following conditions
00007    are met:
00008 
00009    - Redistributions of source code must retain the above copyright
00010    notice, this list of conditions and the following disclaimer.
00011 
00012    - Redistributions in binary form must reproduce the above copyright
00013    notice, this list of conditions and the following disclaimer in the
00014    documentation and/or other materials provided with the distribution.
00015 
00016    - Neither the name of CSIRO Australia nor the names of its
00017    contributors may be used to endorse or promote products derived from
00018    this software without specific prior written permission.
00019 
00020    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00021    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00022    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00023    PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
00024    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00025    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00026    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00027    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00028    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00029    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00030    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00031 */
00032 
00033 #ifndef __ANX_IMPORT_H__
00034 #define __ANX_IMPORT_H__
00035 
00036 #include <annodex/anx_int64.h>
00037 #include <annodex/anx_types.h>
00038 #include <annodex/anx_core.h>
00039 
00068 typedef struct _AnxImporter AnxImporter;
00069 
00073 typedef struct _AnxSourceTrack AnxSourceTrack;
00074 
00079 typedef struct _AnxSource AnxSource;
00080 
00093 typedef AnxSource* (*AnxImporterOpenFunc) (const char * path, const char * id,
00094                                            int ignore_raw,
00095                                            double start_time, double end_time,
00096                                            AnxImportCallbacks * import_callbacks);
00097 
00111 typedef AnxSource * (*AnxImporterOpenFDFunc) (int fd, const char * id,
00112                                               int ignore_raw,
00113                                               double start_time, double end_time,
00114                                               AnxImportCallbacks * import_callbacks);
00115 
00123 typedef long (*AnxImporterReadFunc) (AnxSource * source, unsigned char * buf,
00124                                   long n, long bound);
00125 
00131 typedef long (*AnxImporterSizeofNextReadFunc) (AnxSource * source, long bound);
00132 
00137 typedef int (*AnxImporterCloseFunc) (AnxSource * source);
00138 
00139 struct _AnxImporter {
00140   AnxImporterOpenFunc open;
00141   AnxImporterOpenFDFunc openfd;
00142   AnxImporterCloseFunc close;
00143   AnxImporterReadFunc read;
00144   AnxImporterSizeofNextReadFunc sizeof_next_read;
00145   char * content_type;
00146 };
00147 
00148 struct _AnxSourceTrack {
00149   char * id;
00150   char * content_type;
00151   long nr_header_packets;
00152   anx_int64_t granule_rate_n;
00153   anx_int64_t granule_rate_d;
00154   anx_int64_t start_granule;
00155   anx_int64_t end_granule;
00156   anx_int64_t current_granule;
00157   int eos;
00158 };
00159 
00160 struct _AnxSource {
00161   AnxImporter * importer;
00162   AnxList * tracks;
00163   AnxSourceTrack * current_track; /* points within tracks,
00164                                      managed by importer */
00165   
00166   int eos;
00167   double start_time;
00168   double end_time;
00169   void * custom_data;
00170 };
00171 
00172 #ifdef __cplusplus
00173 extern "C" {
00174 #endif
00175 
00181 int anx_importer_register (AnxImporter * importer);
00182 
00188 int anx_importer_unregister (AnxImporter * importer);
00189 
00190 #ifdef __cplusplus
00191 }
00192 #endif
00193 
00194 #endif /* __ANX_IMPORT_H__ */

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