1 /* libFLAC++ - Free Lossless Audio Codec library
2 * Copyright (C) 2002,2003 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #ifndef FLACPP__DECODER_H
33 #define FLACPP__DECODER_H
37 #include "FLAC/file_decoder.h"
38 #include "FLAC/seekable_stream_decoder.h"
39 #include "FLAC/stream_decoder.h"
42 /** \file include/FLAC++/decoder.h
45 * This module contains the classes which implement the various
48 * See the detailed documentation in the
49 * \link flacpp_decoder decoder \endlink module.
52 /** \defgroup flacpp_decoder FLAC++/decoder.h: decoder classes
56 * This module describes the three decoder layers provided by libFLAC++.
58 * The libFLAC++ decoder classes are object wrappers around their
59 * counterparts in libFLAC. All three decoding layers available in
60 * libFLAC are also provided here. The interface is very similar;
61 * make sure to read the \link flac_decoder libFLAC decoder module \endlink.
63 * The only real difference here is that instead of passing in C function
64 * pointers for callbacks, you inherit from the decoder class and provide
65 * implementations for the callbacks in the derived class; because of this
66 * there is no need for a 'client_data' property.
72 // ============================================================
74 // Equivalent: FLAC__StreamDecoder
76 // ============================================================
78 /** \defgroup flacpp_stream_decoder FLAC++/decoder.h: stream decoder class
79 * \ingroup flacpp_decoder
82 * This class wraps the ::FLAC__StreamDecoder.
84 * See the \link flac_stream_decoder libFLAC stream decoder module \endlink.
89 /** This class wraps the ::FLAC__StreamDecoder.
91 class FLACPP_API Stream {
93 class FLACPP_API State {
95 inline State(::FLAC__StreamDecoderState state): state_(state) { }
96 inline operator ::FLAC__StreamDecoderState() const { return state_; }
97 inline const char *as_cstring() const { return ::FLAC__StreamDecoderStateString[state_]; }
99 ::FLAC__StreamDecoderState state_;
105 bool is_valid() const;
106 inline operator bool() const { return is_valid(); }
108 bool set_metadata_respond(::FLAC__MetadataType type);
109 bool set_metadata_respond_application(const FLAC__byte id[4]);
110 bool set_metadata_respond_all();
111 bool set_metadata_ignore(::FLAC__MetadataType type);
112 bool set_metadata_ignore_application(const FLAC__byte id[4]);
113 bool set_metadata_ignore_all();
115 State get_state() const;
116 unsigned get_channels() const;
117 ::FLAC__ChannelAssignment get_channel_assignment() const;
118 unsigned get_bits_per_sample() const;
119 unsigned get_sample_rate() const;
120 unsigned get_blocksize() const;
122 /** Initialize the instance; as with the C interface,
123 * init() should be called after construction and 'set'
124 * calls but before any of the 'process' calls.
133 bool process_single();
134 bool process_until_end_of_metadata();
135 bool process_until_end_of_stream();
137 virtual ::FLAC__StreamDecoderReadStatus read_callback(FLAC__byte buffer[], unsigned *bytes) = 0;
138 virtual ::FLAC__StreamDecoderWriteStatus write_callback(const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[]) = 0;
139 virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata) = 0;
140 virtual void error_callback(::FLAC__StreamDecoderErrorStatus status) = 0;
142 ::FLAC__StreamDecoder *decoder_;
144 static ::FLAC__StreamDecoderReadStatus read_callback_(const ::FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
145 static ::FLAC__StreamDecoderWriteStatus write_callback_(const ::FLAC__StreamDecoder *decoder, const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
146 static void metadata_callback_(const ::FLAC__StreamDecoder *decoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
147 static void error_callback_(const ::FLAC__StreamDecoder *decoder, ::FLAC__StreamDecoderErrorStatus status, void *client_data);
149 // Private and undefined so you can't use them:
150 Stream(const Stream &);
151 void operator=(const Stream &);
157 // ============================================================
159 // Equivalent: FLAC__SeekableStreamDecoder
161 // ============================================================
163 /** \defgroup flacpp_seekable_stream_decoder FLAC++/decoder.h: seekable stream decoder class
164 * \ingroup flacpp_decoder
167 * This class wraps the ::FLAC__SeekableStreamDecoder.
169 * See the \link flac_seekable_stream_decoder libFLAC seekable stream decoder module \endlink.
174 /** This class wraps the ::FLAC__SeekableStreamDecoder.
176 class FLACPP_API SeekableStream {
178 class FLACPP_API State {
180 inline State(::FLAC__SeekableStreamDecoderState state): state_(state) { }
181 inline operator ::FLAC__SeekableStreamDecoderState() const { return state_; }
182 inline const char *as_cstring() const { return ::FLAC__SeekableStreamDecoderStateString[state_]; }
183 inline const char *resolved_as_cstring(const SeekableStream &decoder) const { return ::FLAC__seekable_stream_decoder_get_resolved_state_string(decoder.decoder_); }
185 ::FLAC__SeekableStreamDecoderState state_;
189 virtual ~SeekableStream();
191 bool is_valid() const;
192 inline operator bool() const { return is_valid(); }
194 bool set_md5_checking(bool value);
195 bool set_metadata_respond(::FLAC__MetadataType type);
196 bool set_metadata_respond_application(const FLAC__byte id[4]);
197 bool set_metadata_respond_all();
198 bool set_metadata_ignore(::FLAC__MetadataType type);
199 bool set_metadata_ignore_application(const FLAC__byte id[4]);
200 bool set_metadata_ignore_all();
202 State get_state() const;
203 Stream::State get_stream_decoder_state() const;
204 bool get_md5_checking() const;
205 unsigned get_channels() const;
206 ::FLAC__ChannelAssignment get_channel_assignment() const;
207 unsigned get_bits_per_sample() const;
208 unsigned get_sample_rate() const;
209 unsigned get_blocksize() const;
218 bool process_single();
219 bool process_until_end_of_metadata();
220 bool process_until_end_of_stream();
222 bool seek_absolute(FLAC__uint64 sample);
224 virtual ::FLAC__SeekableStreamDecoderReadStatus read_callback(FLAC__byte buffer[], unsigned *bytes) = 0;
225 virtual ::FLAC__SeekableStreamDecoderSeekStatus seek_callback(FLAC__uint64 absolute_byte_offset) = 0;
226 virtual ::FLAC__SeekableStreamDecoderTellStatus tell_callback(FLAC__uint64 *absolute_byte_offset) = 0;
227 virtual ::FLAC__SeekableStreamDecoderLengthStatus length_callback(FLAC__uint64 *stream_length) = 0;
228 virtual bool eof_callback() = 0;
229 virtual ::FLAC__StreamDecoderWriteStatus write_callback(const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[]) = 0;
230 virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata) = 0;
231 virtual void error_callback(::FLAC__StreamDecoderErrorStatus status) = 0;
233 ::FLAC__SeekableStreamDecoder *decoder_;
235 static ::FLAC__SeekableStreamDecoderReadStatus read_callback_(const ::FLAC__SeekableStreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
236 static ::FLAC__SeekableStreamDecoderSeekStatus seek_callback_(const ::FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
237 static ::FLAC__SeekableStreamDecoderTellStatus tell_callback_(const ::FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
238 static ::FLAC__SeekableStreamDecoderLengthStatus length_callback_(const ::FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
239 static FLAC__bool eof_callback_(const ::FLAC__SeekableStreamDecoder *decoder, void *client_data);
240 static ::FLAC__StreamDecoderWriteStatus write_callback_(const ::FLAC__SeekableStreamDecoder *decoder, const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
241 static void metadata_callback_(const ::FLAC__SeekableStreamDecoder *decoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
242 static void error_callback_(const ::FLAC__SeekableStreamDecoder *decoder, ::FLAC__StreamDecoderErrorStatus status, void *client_data);
244 // Private and undefined so you can't use them:
245 SeekableStream(const SeekableStream &);
246 void operator=(const SeekableStream &);
252 // ============================================================
254 // Equivalent: FLAC__FileDecoder
256 // ============================================================
258 /** \defgroup flacpp_file_decoder FLAC++/decoder.h: file decoder class
259 * \ingroup flacpp_decoder
262 * This class wraps the ::FLAC__FileDecoder.
264 * See the \link flac_file_decoder libFLAC file decoder module \endlink.
269 /** This class wraps the ::FLAC__FileDecoder.
271 class FLACPP_API File {
273 class FLACPP_API State {
275 inline State(::FLAC__FileDecoderState state): state_(state) { }
276 inline operator ::FLAC__FileDecoderState() const { return state_; }
277 inline const char *as_cstring() const { return ::FLAC__FileDecoderStateString[state_]; }
278 inline const char *resolved_as_cstring(const File &decoder) const { return ::FLAC__file_decoder_get_resolved_state_string(decoder.decoder_); }
280 ::FLAC__FileDecoderState state_;
286 bool is_valid() const;
287 inline operator bool() const { return is_valid(); }
289 bool set_md5_checking(bool value);
290 bool set_filename(const char *value); //!< 'value' may not be \c NULL; use "-" for stdin
291 bool set_metadata_respond(::FLAC__MetadataType type);
292 bool set_metadata_respond_application(const FLAC__byte id[4]);
293 bool set_metadata_respond_all();
294 bool set_metadata_ignore(::FLAC__MetadataType type);
295 bool set_metadata_ignore_application(const FLAC__byte id[4]);
296 bool set_metadata_ignore_all();
298 State get_state() const;
299 SeekableStream::State get_seekable_stream_decoder_state() const;
300 Stream::State get_stream_decoder_state() const;
301 bool get_md5_checking() const;
302 unsigned get_channels() const;
303 ::FLAC__ChannelAssignment get_channel_assignment() const;
304 unsigned get_bits_per_sample() const;
305 unsigned get_sample_rate() const;
306 unsigned get_blocksize() const;
312 bool process_single();
313 bool process_until_end_of_metadata();
314 bool process_until_end_of_file();
316 bool seek_absolute(FLAC__uint64 sample);
318 virtual ::FLAC__StreamDecoderWriteStatus write_callback(const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[]) = 0;
319 virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata) = 0;
320 virtual void error_callback(::FLAC__StreamDecoderErrorStatus status) = 0;
322 ::FLAC__FileDecoder *decoder_;
324 static ::FLAC__StreamDecoderWriteStatus write_callback_(const ::FLAC__FileDecoder *decoder, const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
325 static void metadata_callback_(const ::FLAC__FileDecoder *decoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
326 static void error_callback_(const ::FLAC__FileDecoder *decoder, ::FLAC__StreamDecoderErrorStatus status, void *client_data);
328 // Private and undefined so you can't use them:
330 void operator=(const File &);