1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000,2001,2002 Josh Coalson
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
20 #ifndef FLAC__FILE_DECODER_H
21 #define FLAC__FILE_DECODER_H
23 #include "stream_decoder.h"
30 FLAC__FILE_DECODER_OK = 0,
31 FLAC__FILE_DECODER_END_OF_FILE,
32 FLAC__FILE_DECODER_ERROR_OPENING_FILE,
33 FLAC__FILE_DECODER_MEMORY_ALLOCATION_ERROR,
34 FLAC__FILE_DECODER_SEEK_ERROR,
35 FLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR,
36 FLAC__FILE_DECODER_ALREADY_INITIALIZED,
37 FLAC__FILE_DECODER_INVALID_CALLBACK,
38 FLAC__FILE_DECODER_UNINITIALIZED
39 } FLAC__FileDecoderState;
40 extern const char * const FLAC__FileDecoderStateString[];
42 /***********************************************************************
44 * class FLAC__FileDecoder : public FLAC__StreamDecoder
46 ***********************************************************************/
48 struct FLAC__FileDecoderProtected;
49 struct FLAC__FileDecoderPrivate;
51 struct FLAC__FileDecoderProtected *protected_; /* avoid the C++ keyword 'protected' */
52 struct FLAC__FileDecoderPrivate *private_; /* avoid the C++ keyword 'private' */
55 /***********************************************************************
57 * Class constructor/destructor
59 ***********************************************************************/
62 * Any parameters that are not set before FLAC__file_decoder_init()
63 * will take on the defaults from the constructor, shown below.
64 * For more on what the parameters mean, see the documentation.
66 * FLAC__bool md5_checking (DEFAULT: false) MD5 checking will be turned off if a seek is requested
67 * (*write_callback)() (DEFAULT: NULL ) The callbacks are the only values that MUST be set before FLAC__file_decoder_init()
68 * (*metadata_callback)() (DEFAULT: NULL )
69 * (*error_callback)() (DEFAULT: NULL )
70 * void* client_data (DEFAULT: NULL ) passed back through the callbacks
72 FLAC__FileDecoder *FLAC__file_decoder_new();
73 void FLAC__file_decoder_delete(FLAC__FileDecoder *);
75 /***********************************************************************
77 * Public class method prototypes
79 ***********************************************************************/
82 * Various "set" methods. These may only be called when the decoder
83 * is in the state FLAC__FILE_DECODER_UNINITIALIZED, i.e. after
84 * FLAC__file_decoder_new() or FLAC__file_decoder_finish(), but
85 * before FLAC__file_decoder_init(). If this is the case they will
86 * return true, otherwise false.
88 * NOTE that these functions do not validate the values as many are
89 * interdependent. The FLAC__file_decoder_init() function will do
90 * this, so make sure to pay attention to the state returned by
91 * FLAC__file_decoder_init().
93 * Any parameters that are not set before FLAC__file_decoder_init()
94 * will take on the defaults from the constructor. NOTE that
95 * FLAC__file_decoder_flush() or FLAC__file_decoder_reset() do
96 * NOT reset the values to the constructor defaults.
97 @@@@ update so that only _set_ methods that need to return FLAC__bool, else void; update documentation.html also
98 @@@@ update defaults above and in documentation.html about the metadata_respond/ignore defaults
100 FLAC__bool FLAC__file_decoder_set_md5_checking(FLAC__FileDecoder *decoder, FLAC__bool value);
101 FLAC__bool FLAC__file_decoder_set_filename(FLAC__FileDecoder *decoder, const char *value); /* 'value' may not be 0; use "-" for stdin */
102 FLAC__bool FLAC__file_decoder_set_write_callback(FLAC__FileDecoder *decoder, FLAC__StreamDecoderWriteStatus (*value)(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data));
103 FLAC__bool FLAC__file_decoder_set_metadata_callback(FLAC__FileDecoder *decoder, void (*value)(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data));
104 FLAC__bool FLAC__file_decoder_set_error_callback(FLAC__FileDecoder *decoder, void (*value)(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data));
105 FLAC__bool FLAC__file_decoder_set_client_data(FLAC__FileDecoder *decoder, void *value);
107 * See the comments for the equivalent functions in stream_decoder.h
109 FLAC__bool FLAC__file_decoder_set_metadata_respond(FLAC__FileDecoder *decoder, FLAC__MetaDataType type);
110 FLAC__bool FLAC__file_decoder_set_metadata_respond_application(FLAC__FileDecoder *decoder, const FLAC__byte id[4]);
111 FLAC__bool FLAC__file_decoder_set_metadata_respond_all(FLAC__FileDecoder *decoder);
112 FLAC__bool FLAC__file_decoder_set_metadata_ignore(FLAC__FileDecoder *decoder, FLAC__MetaDataType type);
113 FLAC__bool FLAC__file_decoder_set_metadata_ignore_application(FLAC__FileDecoder *decoder, const FLAC__byte id[4]);
114 FLAC__bool FLAC__file_decoder_set_metadata_ignore_all(FLAC__FileDecoder *decoder);
117 * Various "get" methods
119 FLAC__FileDecoderState FLAC__file_decoder_get_state(const FLAC__FileDecoder *decoder);
120 FLAC__bool FLAC__file_decoder_get_md5_checking(const FLAC__FileDecoder *decoder);
122 * Methods to return the current number of channels, channel assignment
123 * bits-per-sample, sample rate in Hz, and blocksize in samples. These
124 * will only be valid after decoding has started.
126 unsigned FLAC__file_decoder_get_channels(const FLAC__FileDecoder *decoder);
127 FLAC__ChannelAssignment FLAC__file_decoder_get_channel_assignment(const FLAC__FileDecoder *decoder);
128 unsigned FLAC__file_decoder_get_bits_per_sample(const FLAC__FileDecoder *decoder);
129 unsigned FLAC__file_decoder_get_sample_rate(const FLAC__FileDecoder *decoder);
130 unsigned FLAC__file_decoder_get_blocksize(const FLAC__FileDecoder *decoder);
133 * Initialize the instance; should be called after construction and
134 * 'set' calls but before any of the 'process' or 'seek' calls. Will
135 * set and return the decoder state, which will be FLAC__FILE_DECODER_OK
136 * if initialization succeeded.
138 FLAC__FileDecoderState FLAC__file_decoder_init(FLAC__FileDecoder *decoder);
141 * Flush the decoding buffer, release resources, and return the decoder
142 * state to FLAC__FILE_DECODER_UNINITIALIZED. Only returns false if
143 * md5_checking is set AND the stored MD5 sum is non-zero AND the stored
144 * MD5 sum and computed MD5 sum do not match.
146 FLAC__bool FLAC__file_decoder_finish(FLAC__FileDecoder *decoder);
149 * Methods for decoding the data
151 FLAC__bool FLAC__file_decoder_process_whole_file(FLAC__FileDecoder *decoder);
152 FLAC__bool FLAC__file_decoder_process_metadata(FLAC__FileDecoder *decoder);
153 FLAC__bool FLAC__file_decoder_process_one_frame(FLAC__FileDecoder *decoder);
154 FLAC__bool FLAC__file_decoder_process_remaining_frames(FLAC__FileDecoder *decoder);
156 FLAC__bool FLAC__file_decoder_seek_absolute(FLAC__FileDecoder *decoder, FLAC__uint64 sample);