anx_import.h

Go to the documentation of this file.

/*
   Copyright (C) 2003 Commonwealth Scientific and Industrial Research
   Organisation (CSIRO) Australia
 
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:
 
   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
 
   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
 
   - Neither the name of CSIRO Australia nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.
 
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
 
#ifndef __ANX_IMPORT_H__
#define __ANX_IMPORT_H__
 
#include <annodex/anx_types.h>
#include <annodex/anx_core.h>


typedef struct _AnxImporter AnxImporter;

typedef struct _AnxSourceTrack AnxSourceTrack;

typedef struct _AnxSource AnxSource;

typedef AnxSource* (*AnxImporterOpenFunc) (const char * path, const char * id,
                                           int ignore_raw,
                                           double start_time, double end_time,
                                           AnxImportCallbacks * import_callbacks);

typedef AnxSource * (*AnxImporterOpenFDFunc) (int fd, const char * id,
                                              int ignore_raw,
                                              double start_time, double end_time,
                                              AnxImportCallbacks * import_callbacks);

typedef long (*AnxImporterReadFunc) (AnxSource * source, unsigned char * buf,
                                  long n, long bound);

typedef long (*AnxImporterSizeofNextReadFunc) (AnxSource * source, long bound);

typedef int (*AnxImporterCloseFunc) (AnxSource * source);
 
struct _AnxImporter {
  AnxImporterOpenFunc open;
  AnxImporterOpenFDFunc openfd;
  AnxImporterCloseFunc close;
  AnxImporterReadFunc read;
  AnxImporterSizeofNextReadFunc sizeof_next_read;
  char * content_type;
};
 
struct _AnxSourceTrack {
  char * id;
  char * content_type;
  long nr_header_packets;
  anx_int64_t granule_rate_n;
  anx_int64_t granule_rate_d;
  anx_int64_t start_granule;
  anx_int64_t end_granule;
  anx_int64_t current_granule;
  int eos;
  anx_int64_t basegranule;/*< Base granule */
  int preroll;            /*< Preroll */
  int granuleshift;       /*< Granuleshift */
};
 
struct _AnxSource {
  AnxImporter * importer;
  AnxList * tracks;
  AnxSourceTrack * current_track; /* points within tracks,
                                     managed by importer */
  
  int eos;
  double start_time;
  double end_time;
  void * custom_data;
  double current_time;
  int written_secondaries;
  double duration;
  long byte_length;
};
 
#ifdef __cplusplus
extern "C" {
#endif

int anx_importer_register (AnxImporter * importer);

int anx_importer_unregister (AnxImporter * importer);
 

 
AnxImporter *anx_importer_find (char * content_type);
 
#ifdef __cplusplus
}
#endif
 
#endif /* __ANX_IMPORT_H__ */