1
/* libFLAC++ - Free Lossless Audio Codec library
2
* Copyright (C) 2002,2003 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 FLACPP__DECODER_H
21
#define FLACPP__DECODER_H
25
#include "FLAC/file_decoder.h"
26
#include "FLAC/seekable_stream_decoder.h"
27
#include "FLAC/stream_decoder.h"
30
/** \file include/FLAC++/decoder.h
33
* This module contains the classes which implement the various
36
* See the detailed documentation in the
37
* \link flacpp_decoder decoder \endlink module.
40
/** \defgroup flacpp_decoder FLAC++/decoder.h: decoder classes
44
* This module describes the three decoder layers provided by libFLAC++.
46
* The libFLAC++ decoder classes are object wrappers around their
47
* counterparts in libFLAC. All three decoding layers available in
48
* libFLAC are also provided here. The interface is very similar;
49
* make sure to read the \link flac_decoder libFLAC decoder module \endlink.
51
* The only real difference here is that instead of passing in C function
52
* pointers for callbacks, you inherit from the decoder class and provide
53
* implementations for the callbacks in the derived class; because of this
54
* there is no need for a 'client_data' property.
60
// ============================================================
62
// Equivalent: FLAC__StreamDecoder
64
// ============================================================
66
/** \defgroup flacpp_stream_decoder FLAC++/decoder.h: stream decoder class
67
* \ingroup flacpp_decoder
70
* This class wraps the ::FLAC__StreamDecoder.
72
* See the \link flac_stream_decoder libFLAC stream decoder module \endlink.
77
/** This class wraps the ::FLAC__StreamDecoder.
79
class FLACPP_API Stream {
81
class FLACPP_API State {
83
inline State(::FLAC__StreamDecoderState state): state_(state) { }
84
inline operator ::FLAC__StreamDecoderState() const { return state_; }
85
inline const char *as_cstring() const { return ::FLAC__StreamDecoderStateString[state_]; }
86
const char *resolved_as_cstring(const Stream &) const;
88
::FLAC__StreamDecoderState state_;
94
bool is_valid() const;
95
inline operator bool() const { return is_valid(); }
97
bool set_metadata_respond(::FLAC__MetadataType type);
98
bool set_metadata_respond_application(const FLAC__byte id[4]);
99
bool set_metadata_respond_all();
100
bool set_metadata_ignore(::FLAC__MetadataType type);
101
bool set_metadata_ignore_application(const FLAC__byte id[4]);
102
bool set_metadata_ignore_all();
104
State get_state() const;
105
unsigned get_channels() const;
106
::FLAC__ChannelAssignment get_channel_assignment() const;
107
unsigned get_bits_per_sample() const;
108
unsigned get_sample_rate() const;
109
unsigned get_blocksize() const;
111
/** Initialize the instance; as with the C interface,
112
* init() should be called after construction and 'set'
113
* calls but before any of the 'process' calls.
122
bool process_single();
123
bool process_until_end_of_metadata();
124
bool process_until_end_of_stream();
126
virtual ::FLAC__StreamDecoderReadStatus read_callback(FLAC__byte buffer[], unsigned *bytes) = 0;
127
virtual ::FLAC__StreamDecoderWriteStatus write_callback(const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[]) = 0;
128
virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata) = 0;
129
virtual void error_callback(::FLAC__StreamDecoderErrorStatus status) = 0;
131
::FLAC__StreamDecoder *decoder_;
133
static ::FLAC__StreamDecoderReadStatus read_callback_(const ::FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
134
static ::FLAC__StreamDecoderWriteStatus write_callback_(const ::FLAC__StreamDecoder *decoder, const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
135
static void metadata_callback_(const ::FLAC__StreamDecoder *decoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
136
static void error_callback_(const ::FLAC__StreamDecoder *decoder, ::FLAC__StreamDecoderErrorStatus status, void *client_data);
138
// Private and undefined so you can't use them:
139
Stream(const Stream &);
140
void operator=(const Stream &);
146
// ============================================================
148
// Equivalent: FLAC__SeekableStreamDecoder
150
// ============================================================
152
/** \defgroup flacpp_seekable_stream_decoder FLAC++/decoder.h: seekable stream decoder class
153
* \ingroup flacpp_decoder
156
* This class wraps the ::FLAC__SeekableStreamDecoder.
158
* See the \link flac_seekable_stream_decoder libFLAC seekable stream decoder module \endlink.
163
/** This class wraps the ::FLAC__SeekableStreamDecoder.
165
class FLACPP_API SeekableStream {
167
class FLACPP_API State {
169
inline State(::FLAC__SeekableStreamDecoderState state): state_(state) { }
170
inline operator ::FLAC__SeekableStreamDecoderState() const { return state_; }
171
inline const char *as_cstring() const { return ::FLAC__SeekableStreamDecoderStateString[state_]; }
172
const char *resolved_as_cstring(const SeekableStream &) const;
174
::FLAC__SeekableStreamDecoderState state_;
178
virtual ~SeekableStream();
180
bool is_valid() const;
181
inline operator bool() const { return is_valid(); }
183
bool set_md5_checking(bool value);
184
bool set_metadata_respond(::FLAC__MetadataType type);
185
bool set_metadata_respond_application(const FLAC__byte id[4]);
186
bool set_metadata_respond_all();
187
bool set_metadata_ignore(::FLAC__MetadataType type);
188
bool set_metadata_ignore_application(const FLAC__byte id[4]);
189
bool set_metadata_ignore_all();
191
State get_state() const;
192
Stream::State get_stream_decoder_state() const;
193
bool get_md5_checking() const;
194
unsigned get_channels() const;
195
::FLAC__ChannelAssignment get_channel_assignment() const;
196
unsigned get_bits_per_sample() const;
197
unsigned get_sample_rate() const;
198
unsigned get_blocksize() const;
207
bool process_single();
208
bool process_until_end_of_metadata();
209
bool process_until_end_of_stream();
211
bool seek_absolute(FLAC__uint64 sample);
213
virtual ::FLAC__SeekableStreamDecoderReadStatus read_callback(FLAC__byte buffer[], unsigned *bytes) = 0;
214
virtual ::FLAC__SeekableStreamDecoderSeekStatus seek_callback(FLAC__uint64 absolute_byte_offset) = 0;
215
virtual ::FLAC__SeekableStreamDecoderTellStatus tell_callback(FLAC__uint64 *absolute_byte_offset) = 0;
216
virtual ::FLAC__SeekableStreamDecoderLengthStatus length_callback(FLAC__uint64 *stream_length) = 0;
217
virtual bool eof_callback() = 0;
218
virtual ::FLAC__StreamDecoderWriteStatus write_callback(const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[]) = 0;
219
virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata) = 0;
220
virtual void error_callback(::FLAC__StreamDecoderErrorStatus status) = 0;
222
::FLAC__SeekableStreamDecoder *decoder_;
224
static ::FLAC__SeekableStreamDecoderReadStatus read_callback_(const ::FLAC__SeekableStreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
225
static ::FLAC__SeekableStreamDecoderSeekStatus seek_callback_(const ::FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
226
static ::FLAC__SeekableStreamDecoderTellStatus tell_callback_(const ::FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
227
static ::FLAC__SeekableStreamDecoderLengthStatus length_callback_(const ::FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
228
static FLAC__bool eof_callback_(const ::FLAC__SeekableStreamDecoder *decoder, void *client_data);
229
static ::FLAC__StreamDecoderWriteStatus write_callback_(const ::FLAC__SeekableStreamDecoder *decoder, const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
230
static void metadata_callback_(const ::FLAC__SeekableStreamDecoder *decoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
231
static void error_callback_(const ::FLAC__SeekableStreamDecoder *decoder, ::FLAC__StreamDecoderErrorStatus status, void *client_data);
233
// Private and undefined so you can't use them:
234
SeekableStream(const SeekableStream &);
235
void operator=(const SeekableStream &);
241
// ============================================================
243
// Equivalent: FLAC__FileDecoder
245
// ============================================================
247
/** \defgroup flacpp_file_decoder FLAC++/decoder.h: file decoder class
248
* \ingroup flacpp_decoder
251
* This class wraps the ::FLAC__FileDecoder.
253
* See the \link flac_file_decoder libFLAC file decoder module \endlink.
258
/** This class wraps the ::FLAC__FileDecoder.
260
class FLACPP_API File {
262
class FLACPP_API State {
264
inline State(::FLAC__FileDecoderState state): state_(state) { }
265
inline operator ::FLAC__FileDecoderState() const { return state_; }
266
inline const char *as_cstring() const { return ::FLAC__FileDecoderStateString[state_]; }
267
const char *resolved_as_cstring(const File &) const;
269
::FLAC__FileDecoderState state_;
275
bool is_valid() const;
276
inline operator bool() const { return is_valid(); }
278
bool set_md5_checking(bool value);
279
bool set_filename(const char *value); //!< 'value' may not be \c NULL; use "-" for stdin
280
bool set_metadata_respond(::FLAC__MetadataType type);
281
bool set_metadata_respond_application(const FLAC__byte id[4]);
282
bool set_metadata_respond_all();
283
bool set_metadata_ignore(::FLAC__MetadataType type);
284
bool set_metadata_ignore_application(const FLAC__byte id[4]);
285
bool set_metadata_ignore_all();
287
State get_state() const;
288
SeekableStream::State get_seekable_stream_decoder_state() const;
289
Stream::State get_stream_decoder_state() const;
290
bool get_md5_checking() const;
291
unsigned get_channels() const;
292
::FLAC__ChannelAssignment get_channel_assignment() const;
293
unsigned get_bits_per_sample() const;
294
unsigned get_sample_rate() const;
295
unsigned get_blocksize() const;
301
bool process_single();
302
bool process_until_end_of_metadata();
303
bool process_until_end_of_file();
305
bool seek_absolute(FLAC__uint64 sample);
307
virtual ::FLAC__StreamDecoderWriteStatus write_callback(const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[]) = 0;
308
virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata) = 0;
309
virtual void error_callback(::FLAC__StreamDecoderErrorStatus status) = 0;
311
::FLAC__FileDecoder *decoder_;
313
static ::FLAC__StreamDecoderWriteStatus write_callback_(const ::FLAC__FileDecoder *decoder, const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
314
static void metadata_callback_(const ::FLAC__FileDecoder *decoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
315
static void error_callback_(const ::FLAC__FileDecoder *decoder, ::FLAC__StreamDecoderErrorStatus status, void *client_data);
317
// Private and undefined so you can't use them:
319
void operator=(const File &);