144 lines
5.0 KiB
C++
144 lines
5.0 KiB
C++
/* libOggFLAC++ - Free Lossless Audio Codec + Ogg library
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* Copyright (C) 2002 Josh Coalson
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef OggFLACPP__DECODER_H
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#define OggFLACPP__DECODER_H
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#include "OggFLAC/stream_decoder.h"
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// we only need this for the state abstraction really...
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#include "FLAC++/decoder.h"
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/** \file include/OggFLAC++/decoder.h
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*
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* \brief
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* This module contains the classes which implement the various
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* decoders.
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*
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* See the detailed documentation in the
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* \link oggflacpp_decoder decoder \endlink module.
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*/
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/** \defgroup oggflacpp_decoder OggFLAC++/decoder.h: decoder classes
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* \ingroup oggflacpp
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*
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* \brief
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* This module describes the decoder layers provided by libOggFLAC++.
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*
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* The libOggFLAC++ decoder classes are object wrappers around their
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* counterparts in libOggFLAC. Only the stream decoding layer in
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* libOggFLAC provided here. The interface is very similar;
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* make sure to read the \link oggflac_decoder libOggFLAC decoder module \endlink.
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*
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* The only real difference here is that instead of passing in C function
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* pointers for callbacks, you inherit from the decoder class and provide
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* implementations for the callbacks in the derived class; because of this
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* there is no need for a 'client_data' property.
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*/
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namespace OggFLAC {
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namespace Decoder {
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// ============================================================
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//
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// Equivalent: OggFLAC__StreamDecoder
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//
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// ============================================================
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/** \defgroup oggflacpp_stream_decoder OggFLAC++/decoder.h: stream decoder class
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* \ingroup oggflacpp_decoder
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*
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* \brief
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* This class wraps the ::OggFLAC__StreamDecoder.
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*
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* See the \link oggflac_stream_decoder libOggFLAC stream decoder module \endlink.
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*
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* \{
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*/
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/** This class wraps the ::OggFLAC__StreamDecoder.
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*/
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class Stream {
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public:
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class State {
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public:
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inline State(::OggFLAC__StreamDecoderState state): state_(state) { }
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inline operator ::OggFLAC__StreamDecoderState() const { return state_; }
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inline const char *as_cstring() const { return ::OggFLAC__StreamDecoderStateString[state_]; }
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protected:
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::OggFLAC__StreamDecoderState state_;
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};
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Stream();
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virtual ~Stream();
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bool is_valid() const;
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inline operator bool() const { return is_valid(); }
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bool set_serial_number(long value);
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bool set_metadata_respond(::FLAC__MetadataType type);
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bool set_metadata_respond_application(const FLAC__byte id[4]);
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bool set_metadata_respond_all();
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bool set_metadata_ignore(::FLAC__MetadataType type);
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bool set_metadata_ignore_application(const FLAC__byte id[4]);
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bool set_metadata_ignore_all();
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State get_state() const;
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FLAC::Decoder::Stream::State get_FLAC_stream_decoder_state() const;
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unsigned get_channels() const;
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::FLAC__ChannelAssignment get_channel_assignment() const;
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unsigned get_bits_per_sample() const;
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unsigned get_sample_rate() const;
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unsigned get_blocksize() const;
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State init();
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void finish();
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bool flush();
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bool reset();
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bool process_single();
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bool process_until_end_of_metadata();
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bool process_until_end_of_stream();
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protected:
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virtual ::FLAC__StreamDecoderReadStatus read_callback(FLAC__byte buffer[], unsigned *bytes) = 0;
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virtual ::FLAC__StreamDecoderWriteStatus write_callback(const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[]) = 0;
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virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata) = 0;
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virtual void error_callback(::FLAC__StreamDecoderErrorStatus status) = 0;
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::OggFLAC__StreamDecoder *decoder_;
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private:
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static ::FLAC__StreamDecoderReadStatus read_callback_(const ::OggFLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
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static ::FLAC__StreamDecoderWriteStatus write_callback_(const ::OggFLAC__StreamDecoder *decoder, const ::FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
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static void metadata_callback_(const ::OggFLAC__StreamDecoder *decoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
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static void error_callback_(const ::OggFLAC__StreamDecoder *decoder, ::FLAC__StreamDecoderErrorStatus status, void *client_data);
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// Private and undefined so you can't use them:
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Stream(const Stream &);
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void operator=(const Stream &);
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};
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/* \} */
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};
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};
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#endif
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