include/OggFLAC++/decoder.h Source File

00001 /* libOggFLAC++ - Free Lossless Audio Codec + Ogg library
00002  * Copyright (C) 2002,2003  Josh Coalson
00003  *
00004  * This library is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Library General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2 of the License, or (at your option) any later version.
00008  *
00009  * This library is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * Library General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU Library General Public
00015  * License along with this library; if not, write to the
00016  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00017  * Boston, MA  02111-1307, USA.
00018  */
00019 
00020 #ifndef OggFLACPP__DECODER_H
00021 #define OggFLACPP__DECODER_H
00022 
00023 #include "export.h"
00024 
00025 #include "OggFLAC/stream_decoder.h"
00026 // we only need this for the state abstraction really...
00027 #include "FLAC++/decoder.h"
00028 
00029 
00057 namespace OggFLAC {
00058     namespace Decoder {
00059 
00060         // ============================================================
00061         //
00062         //  Equivalent: OggFLAC__StreamDecoder
00063         //
00064         // ============================================================
00065 
00079         class OggFLACPP_API Stream {
00080         public:
00081             class OggFLACPP_API State {
00082             public:
00083                 inline State(::OggFLAC__StreamDecoderState state): state_(state) { }
00084                 inline operator ::OggFLAC__StreamDecoderState() const { return state_; }
00085                 inline const char *as_cstring() const { return ::OggFLAC__StreamDecoderStateString[state_]; }
00086             protected:
00087                 ::OggFLAC__StreamDecoderState state_;
00088             };
00089 
00090             Stream();
00091             virtual ~Stream();
00092 
00093             bool is_valid() const;
00094             inline operator bool() const { return is_valid(); }
00095 
00096             bool set_serial_number(long value);
00097             bool set_metadata_respond(::FLAC__MetadataType type);
00098             bool set_metadata_respond_application(const FLAC__byte id[4]);
00099             bool set_metadata_respond_all();
00100             bool set_metadata_ignore(::FLAC__MetadataType type);
00101             bool set_metadata_ignore_application(const FLAC__byte id[4]);
00102             bool set_metadata_ignore_all();
00103 
00104             State get_state() const;
00105             FLAC::Decoder::Stream::State get_FLAC_stream_decoder_state() const;
00106             unsigned get_channels() const;
00107             ::FLAC__ChannelAssignment get_channel_assignment() const;
00108             unsigned get_bits_per_sample() const;
00109             unsigned get_sample_rate() const;
00110             unsigned get_blocksize() const;
00111 
00112             State init();
00113 
00114             void finish();
00115 
00116             bool flush();
00117             bool reset();
00118 
00119             bool process_single();
00120             bool process_until_end_of_metadata();
00121             bool process_until_end_of_stream();
00122         protected:
00123             virtual ::FLAC__StreamDecoderReadStatus read_callback(FLAC__byte buffer[], unsigned *bytes) = 0;
00124             virtual ::FLAC__StreamDecoderWriteStatus write_callback(const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[]) = 0;
00125             virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata) = 0;
00126             virtual void error_callback(::FLAC__StreamDecoderErrorStatus status) = 0;
00127 
00128             ::OggFLAC__StreamDecoder *decoder_;
00129         private:
00130             static ::FLAC__StreamDecoderReadStatus read_callback_(const ::OggFLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
00131             static ::FLAC__StreamDecoderWriteStatus write_callback_(const ::OggFLAC__StreamDecoder *decoder, const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
00132             static void metadata_callback_(const ::OggFLAC__StreamDecoder *decoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
00133             static void error_callback_(const ::OggFLAC__StreamDecoder *decoder, ::FLAC__StreamDecoderErrorStatus status, void *client_data);
00134 
00135             // Private and undefined so you can't use them:
00136             Stream(const Stream &);
00137             void operator=(const Stream &);
00138         };
00139 
00140         /* \} */
00141 
00142     };
00143 };
00144 
00145 #endif