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//-------------------------------------------------------------------------
// This class encapsulates a flac seekable stream. Only the functions
// needed by the alsaplayer flac plugin are implemented. It inherits from
// class FlacStream.
//
// Copyright (c) 2002 by Drew Hess <dhess@bothan.net>
//
/* This file is part of AlsaPlayer.
*
* AlsaPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* AlsaPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
//-------------------------------------------------------------------------
#ifndef _FLAC_SEEKABLE_STREAM_H_
#define _FLAC_SEEKABLE_STREAM_H_
#include "FlacStream.h"
#if !defined(FLAC_API_VERSION_CURRENT) || FLAC_API_VERSION_CURRENT < 8
#define LEGACY_FLAC
#else
#undef LEGACY_FLAC
#endif
extern "C"
{
#ifdef LEGACY_FLAC
#include <FLAC/seekable_stream_decoder.h>
#else
#include <FLAC/stream_decoder.h>
#endif
}
namespace Flac
{
class FlacEngine;
class FlagTag;
class FlacSeekableStream : public FlacStream
{
public:
//------------------------------------------------------------------
// Constructor and destructor. The reader_type f belongs to the
// FlacSeekableStream after construction, and it will be closed
// upon deletion of the FlacSeekableStream object. If reportErrors
// is false, the object will squelch all alsaplayer_error messages.
// This is particularly useful when attempting to open streams
// to determine whether they're FLAC streams.
//------------------------------------------------------------------
FlacSeekableStream (const std::string & name,
reader_type * f,
bool reportErrors = true);
virtual ~FlacSeekableStream ();
//--------------------------------------------------------
// See FlacStream.h for a description of these functions.
//--------------------------------------------------------
virtual bool open ();
virtual bool processOneBlock ();
//---------------------------------------------
// Seek to the specified sample in the stream.
//---------------------------------------------
virtual bool seekAbsolute (FLAC__uint64 sample);
private:
//---------------------------------------
// flac callbacks for a seekable stream.
//---------------------------------------
#ifdef LEGACY_FLAC
static void metaCallBack (const FLAC__SeekableStreamDecoder * decoder,
#else
static void metaCallBack (const FLAC__StreamDecoder * decoder,
#endif
const FLAC__StreamMetadata * md,
void * client_data);
static FLAC__StreamDecoderWriteStatus
#ifdef LEGACY_FLAC
writeCallBack (const FLAC__SeekableStreamDecoder * decoder,
#else
writeCallBack (const FLAC__StreamDecoder * decoder,
#endif
const FLAC__Frame * block,
const FLAC__int32 * const buffer[],
void * client_data);
#ifdef LEGACY_FLAC
static FLAC__SeekableStreamDecoderReadStatus
readCallBack (const FLAC__SeekableStreamDecoder * decoder,
#else
static FLAC__StreamDecoderReadStatus
readCallBack (const FLAC__StreamDecoder * decoder,
#endif
FLAC__byte buffer[],
size_t * bytes,
void * client_data);
#ifdef LEGACY_FLAC
static void errCallBack (const FLAC__SeekableStreamDecoder * decoder,
#else
static void errCallBack (const FLAC__StreamDecoder * decoder,
#endif
FLAC__StreamDecoderErrorStatus status,
void * client_data);
#ifdef LEGACY_FLAC
static FLAC__SeekableStreamDecoderSeekStatus
seekCallBack (const FLAC__SeekableStreamDecoder * decoder,
#else
static FLAC__StreamDecoderSeekStatus
seekCallBack (const FLAC__StreamDecoder * decoder,
#endif
FLAC__uint64 offset,
void * client_data);
#ifdef LEGACY_FLAC
static FLAC__SeekableStreamDecoderTellStatus
tellCallBack (const FLAC__SeekableStreamDecoder * decoder,
#else
static FLAC__StreamDecoderTellStatus
tellCallBack (const FLAC__StreamDecoder * decoder,
#endif
FLAC__uint64 * offset,
void * client_data);
#ifdef LEGACY_FLAC
static FLAC__SeekableStreamDecoderLengthStatus
lengthCallBack (const FLAC__SeekableStreamDecoder * decoder,
#else
static FLAC__StreamDecoderLengthStatus
lengthCallBack (const FLAC__StreamDecoder * decoder,
#endif
FLAC__uint64 * len,
void * client_data);
#ifdef LEGACY_FLAC
static FLAC__bool eofCallBack (const FLAC__SeekableStreamDecoder * decoder,
#else
static FLAC__bool eofCallBack (const FLAC__StreamDecoder * decoder,
#endif
void * client_data);
private:
FlacSeekableStream ();
private:
#ifdef LEGACY_FLAC
FLAC__SeekableStreamDecoder * _decoder;
#else
FLAC__StreamDecoder * _decoder;
#endif
}; // class FlacSeekableStream
//-----------------
// Inline methods.
//-----------------
inline
FlacSeekableStream::FlacSeekableStream ()
: _decoder (0)
{
}
} // namespace Flac
#endif // _FLAC_SEEKABLE_STREAM_H_
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