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|
//-------------------------------------------------------------------------
// This class encapsulates the OggFLAC stream. Only the functions
// needed by the alsaplayer flac plugin are implemented.
//
// 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/>.
*/
//-------------------------------------------------------------------------
#include "OggFlacStream.h"
#include "FlacEngine.h"
#include <string.h>
#include "alsaplayer_error.h"
#include <string>
using namespace std;
namespace Flac
{
// static
bool
OggFlacStream::isOggFlacStream (const string & name)
{
reader_type * rdr = reader_open (name.c_str (), NULL, NULL);
if (!rdr)
return false;
OggFlacStream f (name, rdr, false);
return f.open ();
} // OggFlacStream::isOggFlacStream
OggFlacStream::OggFlacStream (const string & name,
reader_type * f,
bool reportErrors)
: FlacStream (name, f, reportErrors),
_decoder (0)
{
} // OggFlacStream::OggFlacStream
OggFlacStream::~OggFlacStream ()
{
if (_decoder)
{
OggFLAC__stream_decoder_finish (_decoder);
OggFLAC__stream_decoder_delete (_decoder);
_decoder = 0;
}
} // OggFlacStream::~OggFlacStream
bool
OggFlacStream::open ()
{
// it's illegal to call this on an already open stream
if (_decoder)
return false;
_decoder = OggFLAC__stream_decoder_new ();
if (!_decoder)
return false;
bool status = true;
status &= OggFLAC__stream_decoder_set_read_callback (_decoder,
readCallBack);
status &= OggFLAC__stream_decoder_set_write_callback (_decoder,
writeCallBack);
status &= OggFLAC__stream_decoder_set_metadata_callback (_decoder,
metaCallBack);
status &= OggFLAC__stream_decoder_set_error_callback (_decoder,
errCallBack);
status &= OggFLAC__stream_decoder_set_client_data (_decoder,
(void *) this);
if (!status)
return false;
status = (OggFLAC__stream_decoder_init (_decoder) ==
OggFLAC__STREAM_DECODER_OK);
if (!status)
return false;
// this will invoke the metaCallBack
if (!OggFLAC__stream_decoder_process_until_end_of_metadata (_decoder))
return false;
// now that we've opened the stream, tell the engine it's safe to
// initialize itself.
if (!_engine->init ())
return false;
// return the metaCallBack's status
return _mcbSuccess;
} // OggFlacStream::open
bool
OggFlacStream::processOneBlock ()
{
if (!_decoder)
return false;
return OggFLAC__stream_decoder_process_single (_decoder);
} // OggFlacStream::processOneBlock
// static
void
OggFlacStream::metaCallBack (const OggFLAC__StreamDecoder * decoder,
const FLAC__StreamMetadata * md,
void * client_data)
{
OggFlacStream * f = (OggFlacStream *) client_data;
if (!f)
{
f->apError ("OggFlacStream::metaCallBack(): no client data");
return;
}
f->realMetaCallBack (md);
} // OggFlacStream::metaCallBack
// static
void
OggFlacStream::errCallBack (const OggFLAC__StreamDecoder * decoder,
FLAC__StreamDecoderErrorStatus status,
void * client_data)
{
OggFlacStream * f = (OggFlacStream *) client_data;
if (!f)
{
f->apError ("OggFlacStream::errCallBack (): no client data");
return;
}
f->realErrCallBack ("OggFLAC", status);
} // OggFlacStream::errCallBack
// static
FLAC__StreamDecoderWriteStatus
OggFlacStream::writeCallBack (const OggFLAC__StreamDecoder * decoder,
const FLAC__Frame * block,
const FLAC__int32 * const buffer[],
void * client_data)
{
if (!client_data)
return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
OggFlacStream * f = (OggFlacStream *) client_data;
if (!f)
return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
return f->realWriteCallBack (block, buffer);
} // OggFlacStream::writeCallBack
// static
FLAC__StreamDecoderReadStatus
OggFlacStream::readCallBack (const OggFLAC__StreamDecoder * decoder,
FLAC__byte buffer[],
size_t * bytes,
void * client_data)
{
if (!client_data)
return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
OggFlacStream * f = (OggFlacStream *) client_data;
if (!f)
return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
return f->realReadCallBack (buffer, bytes);
} // OggFlacStream::readCallBack
} // namespace Flac
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