apps/codecs/libmusepack/reader.h

   1 /*
   2   Copyright (c) 2005-2009, The Musepack Development Team
   3   All rights reserved.
   4
   5   Redistribution and use in source and binary forms, with or without
   6   modification, are permitted provided that the following conditions are
   7   met:
   8
   9   * Redistributions of source code must retain the above copyright
  10   notice, this list of conditions and the following disclaimer.
  11
  12   * Redistributions in binary form must reproduce the above
  13   copyright notice, this list of conditions and the following
  14   disclaimer in the documentation and/or other materials provided
  15   with the distribution.
  16
  17   * Neither the name of the The Musepack Development Team nor the
  18   names of its contributors may be used to endorse or promote
  19   products derived from this software without specific prior
  20   written permission.
  21
  22   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  25   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  26   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  27   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  28   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  32   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33 */
  34 /// \file reader.h
  35 #ifndef _MPCDEC_READER_H_
  36 #define _MPCDEC_READER_H_
  37 #ifdef WIN32
  38 #pragma once
  39 #endif
  40
  41 #include "mpc_types.h"
  42 #include <stdio.h>
  43
  44 #ifdef __cplusplus
  45 extern "C" {
  46 #endif
  47
  48
  49 /// \brief Stream reader interface structure.
  50 ///
  51 /// This is the structure you must supply to the musepack decoding library
  52 /// to feed it with raw data.  Implement the five member functions to provide
  53 /// a functional reader.
  54 typedef struct mpc_reader_t mpc_reader;
  55 struct mpc_reader_t {
  56     /// Reads size bytes of data into buffer at ptr.
  57     mpc_int32_t (*read)(mpc_reader *p_reader, void *ptr, mpc_int32_t size);
  58
  59     /// Seeks to byte position offset.
  60     mpc_bool_t (*seek)(mpc_reader *p_reader, mpc_int32_t offset);
  61
  62     /// Returns the current byte offset in the stream.
  63     mpc_int32_t (*tell)(mpc_reader *p_reader);
  64
  65     /// Returns the total length of the source stream, in bytes.
  66     mpc_int32_t (*get_size)(mpc_reader *p_reader);
  67
  68     /// True if the stream is a seekable stream.
  69     mpc_bool_t (*canseek)(mpc_reader *p_reader);
  70
  71     /// Field that can be used to identify a particular instance of
  72     /// reader or carry along data associated with that reader.
  73     void *data;
  74 };
  75 /* rockbox: not used
  76 /// Initializes reader with default stdio file reader implementation.  Use
  77 /// this if you're just reading from a plain file.
  78 ///
  79 /// \param r p_reader handle to initialize
  80 /// \param filename input filename to attach to the reader
  81 MPC_API mpc_status mpc_reader_init_stdio(mpc_reader *p_reader, const char *filename);
  82
  83 /// Initializes reader with default stdio file reader implementation.  Use
  84 /// this if you prefer to open the file yourself.
  85 ///
  86 /// \param r p_reader handle to initialize
  87 /// \param p_file input file handle (already open)
  88 MPC_API mpc_status mpc_reader_init_stdio_stream(mpc_reader * p_reader, FILE * p_file);
  89
  90 /// Release reader with default stdio file reader implementation.
  91 ///
  92 /// \param r reader handle to release
  93 MPC_API void mpc_reader_exit_stdio(mpc_reader *p_reader);
  94 */
  95 #ifdef __cplusplus
  96 }
  97 #endif
  98 #endif