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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_types.h>
00037 #include <annodex/anx_core.h>
00038 
00067 typedef struct _AnxImporter AnxImporter;
00068 
00072 typedef struct _AnxSourceTrack AnxSourceTrack;
00073 
00078 typedef struct _AnxSource AnxSource;
00079 
00092 typedef AnxSource* (*AnxImporterOpenFunc) (const char * path, const char * id,
00093                                            int ignore_raw,
00094                                            double start_time, double end_time,
00095                                            AnxImportCallbacks * import_callbacks);
00096 
00110 typedef AnxSource * (*AnxImporterOpenFDFunc) (int fd, const char * id,
00111                                               int ignore_raw,
00112                                               double start_time, double end_time,
00113                                               AnxImportCallbacks * import_callbacks);
00114 
00122 typedef long (*AnxImporterReadFunc) (AnxSource * source, unsigned char * buf,
00123                                   long n, long bound);
00124 
00130 typedef long (*AnxImporterSizeofNextReadFunc) (AnxSource * source, long bound);
00131 
00136 typedef int (*AnxImporterCloseFunc) (AnxSource * source);
00137 
00138 struct _AnxImporter {
00139   AnxImporterOpenFunc open;
00140   AnxImporterOpenFDFunc openfd;
00141   AnxImporterCloseFunc close;
00142   AnxImporterReadFunc read;
00143   AnxImporterSizeofNextReadFunc sizeof_next_read;
00144   char * content_type;
00145 };
00146 
00147 struct _AnxSourceTrack {
00148   char * id;
00149   char * content_type;
00150   long nr_header_packets;
00151   anx_int64_t granule_rate_n;
00152   anx_int64_t granule_rate_d;
00153   anx_int64_t start_granule;
00154   anx_int64_t end_granule;
00155   anx_int64_t current_granule;
00156   int eos;
00157   anx_int64_t basegranule;/*< Base granule */
00158   int preroll;            /*< Preroll */
00159   int granuleshift;       /*< Granuleshift */
00160 };
00161 
00162 struct _AnxSource {
00163   AnxImporter * importer;
00164   AnxList * tracks;
00165   AnxSourceTrack * current_track; /* points within tracks,
00166                                      managed by importer */
00167   
00168   int eos;
00169   double start_time;
00170   double end_time;
00171   void * custom_data;
00172   double current_time;
00173   int written_secondaries;
00174   double duration;
00175   long byte_length;
00176 };
00177 
00178 #ifdef __cplusplus
00179 extern "C" {
00180 #endif
00181 
00187 int anx_importer_register (AnxImporter * importer);
00188 
00194 int anx_importer_unregister (AnxImporter * importer);
00195 
00196 
00203 AnxImporter *anx_importer_find (char * content_type);
00204 
00205 #ifdef __cplusplus
00206 }
00207 #endif
00208 
00209 #endif /* __ANX_IMPORT_H__ */

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