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/*------------------------------------------------------------------------------
Copyright (c) 2000-2007 Tyrell Corporation. All rights reserved.
Tyrell DarkIce
File : VorbisLibEncoder.h
Version : $Revision: 553 $
Author : $Author: rafael@riseup.net $
Location : $HeadURL: https://darkice.googlecode.com/svn/darkice/tags/darkice-1_2/src/VorbisLibEncoder.h $
Copyright notice:
This program 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.
This program 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
------------------------------------------------------------------------------*/
#ifndef VORBIS_LIB_ENCODER_H
#define VORBIS_LIB_ENCODER_H
#ifndef __cplusplus
#error This is a C++ include file
#endif
/* ============================================================ include files */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_VORBIS_LIB
#include <vorbis/vorbisenc.h>
#else
#error configure for Ogg Vorbis
#endif
#include "Ref.h"
#include "Exception.h"
#include "Reporter.h"
#include "AudioEncoder.h"
#include "CastSink.h"
#ifdef HAVE_SRC_LIB
#include <samplerate.h>
#else
#include "aflibConverter.h"
#endif
/* ================================================================ constants */
/* =================================================================== macros */
/* =============================================================== data types */
/**
* A class representing the ogg vorbis encoder linked as a shared object or
* as a static library.
*
* @author $Author: rafael@riseup.net $
* @version $Revision: 553 $
*/
class VorbisLibEncoder : public AudioEncoder, public virtual Reporter
{
private:
/**
* Value indicating if the encoding process is going on
*/
bool encoderOpen;
/**
* Ogg Vorbis library global info
*/
vorbis_info vorbisInfo;
/**
* Ogg Vorbis library global DSP state
*/
vorbis_dsp_state vorbisDspState;
/**
* Ogg Vorbis library global block
*/
vorbis_block vorbisBlock;
/**
* Ogg Vorbis library global comment
*/
vorbis_comment vorbisComment;
/**
* Ogg library global stream state
*/
ogg_stream_state oggStreamState;
/**
* Maximum bitrate of the output in kbits/sec. If 0, don't care.
*/
unsigned int outMaxBitrate;
/**
* Resample ratio
*/
double resampleRatio;
/**
* sample rate converter object for possible resampling
*/
#ifdef HAVE_SRC_LIB
SRC_STATE * converter;
SRC_DATA converterData;
#else
aflibConverter * converter;
#endif
/**
* Initialize the object.
*
* @param the maximum bit rate
* @exception Exception
*/
void
init ( unsigned int outMaxBitrate ) throw ( Exception );
/**
* De-initialize the object.
*
* @exception Exception
*/
inline void
strip ( void ) throw ( Exception )
{
if ( converter ) {
#ifdef HAVE_SRC_LIB
delete [] converterData.data_in;
delete [] converterData.data_out;
src_delete (converter);
#else
delete converter;
#endif
}
}
/**
* Send pending Vorbis blocks to the underlying stream
*/
void
vorbisBlocksOut( void ) throw ( Exception );
protected:
/**
* Default constructor. Always throws an Exception.
*
* @exception Exception
*/
inline
VorbisLibEncoder ( void ) throw ( Exception )
{
throw Exception( __FILE__, __LINE__);
}
public:
/**
* Constructor.
*
* @param sink the sink to send encoded output to
* @param inSampleRate sample rate of the input.
* @param inBitsPerSample number of bits per sample of the input.
* @param inChannel number of channels of the input.
* @param inBigEndian shows if the input is big or little endian
* @param outBitrateMode the bit rate mode of the output.
* @param outBitrate bit rate of the output (kbits/sec).
* @param outQuality the quality of the stream.
* @param outSampleRate sample rate of the output.
* If 0, inSampleRate is used.
* @param outMaxBitrate maximum output bitrate.
* 0 if not used.
* @param outChannel number of channels of the output.
* If 0, inChannel is used.
* @exception Exception
*/
inline
VorbisLibEncoder ( CastSink * sink,
unsigned int inSampleRate,
unsigned int inBitsPerSample,
unsigned int inChannel,
bool inBigEndian,
BitrateMode outBitrateMode,
unsigned int outBitrate,
double outQuality,
unsigned int outSampleRate = 0,
unsigned int outChannel = 0,
unsigned int outMaxBitrate = 0 )
throw ( Exception )
: AudioEncoder ( sink,
inSampleRate,
inBitsPerSample,
inChannel,
inBigEndian,
outBitrateMode,
outBitrate,
outQuality,
outSampleRate,
outChannel )
{
init( outMaxBitrate);
}
/**
* Constructor.
*
* @param sink the sink to send encoded output to
* @param as get input sample rate, bits per sample and channels
* from this AudioSource.
* @param outBitrateMode the bit rate mode of the output.
* @param outBitrate bit rate of the output (kbits/sec).
* @param outQuality the quality of the stream.
* @param outSampleRate sample rate of the output.
* If 0, input sample rate is used.
* @param outMaxBitrate maximum output bitrate.
* 0 if not used.
* @param outChannel number of channels of the output.
* If 0, input channel is used.
* @exception Exception
*/
inline
VorbisLibEncoder ( CastSink * sink,
const AudioSource * as,
BitrateMode outBitrateMode,
unsigned int outBitrate,
double outQuality,
unsigned int outSampleRate = 0,
unsigned int outChannel = 0,
unsigned int outMaxBitrate = 0 )
throw ( Exception )
: AudioEncoder ( sink,
as,
outBitrateMode,
outBitrate,
outQuality,
outSampleRate,
outChannel )
{
init( outMaxBitrate);
}
/**
* Copy constructor.
*
* @param encoder the VorbisLibEncoder to copy.
*/
inline
VorbisLibEncoder ( const VorbisLibEncoder & encoder )
throw ( Exception )
: AudioEncoder( encoder )
{
if( encoder.isOpen() ) {
throw Exception(__FILE__, __LINE__, "don't copy open encoders");
}
init( encoder.getOutMaxBitrate() );
}
/**
* Destructor.
*
* @exception Exception
*/
inline virtual
~VorbisLibEncoder ( void ) throw ( Exception )
{
if ( isOpen() ) {
close();
}
strip();
}
/**
* Assignment operator.
*
* @param encoder the VorbisLibEncoder to assign this to.
* @return a reference to this VorbisLibEncoder.
* @exception Exception
*/
inline virtual VorbisLibEncoder &
operator= ( const VorbisLibEncoder & encoder ) throw ( Exception )
{
if( encoder.isOpen() ) {
throw Exception(__FILE__, __LINE__, "don't copy open encoders");
}
if ( this != &encoder ) {
strip();
AudioEncoder::operator=( encoder);
init( encoder.getOutMaxBitrate() );
}
return *this;
}
/**
* Get the maximum bit rate of the output in kbits/sec,
* for fixed / average bitrate encodings.
*
* @return the maximum bit rate of the output, or 0 if not set.
*/
inline unsigned int
getOutMaxBitrate ( void ) const throw ()
{
return outMaxBitrate;
}
/**
* Check wether encoding is in progress.
*
* @return true if encoding is in progress, false otherwise.
*/
inline virtual bool
isRunning ( void ) const throw ()
{
return isOpen();
}
/**
* Start encoding. This function returns as soon as possible,
* with encoding started in the background.
*
* @return true if encoding has started, false otherwise.
* @exception Exception
*/
inline virtual bool
start ( void ) throw ( Exception )
{
return open();
}
/**
* Stop encoding. Stops the encoding running in the background.
*
* @exception Exception
*/
inline virtual void
stop ( void ) throw ( Exception )
{
return close();
}
/**
* Open an encoding session.
*
* @return true if opening was successfull, false otherwise.
* @exception Exception
*/
virtual bool
open ( void ) throw ( Exception );
/**
* Check if the encoding session is open.
*
* @return true if the encoding session is open, false otherwise.
*/
inline virtual bool
isOpen ( void ) const throw ()
{
return encoderOpen;
}
/**
* Check if the encoder is ready to accept data.
*
* @param sec the maximum seconds to block.
* @param usec micro seconds to block after the full seconds.
* @return true if the encoder is ready to accept data,
* false otherwise.
* @exception Exception
*/
inline virtual bool
canWrite ( unsigned int sec,
unsigned int usec ) throw ( Exception )
{
if ( !isOpen() ) {
return false;
}
return getSink()->canWrite(sec, usec);
}
/**
* Write data to the encoder.
* Buf is expected to be a sequence of big-endian 16 bit values,
* with left and right channels interleaved. Len is the number of
* bytes, must be a multiple of 4.
*
* @param buf the data to write.
* @param len number of bytes to write from buf.
* @return the number of bytes written (may be less than len).
* @exception Exception
*/
virtual unsigned int
write ( const void * buf,
unsigned int len ) throw ( Exception );
/**
* Flush all data that was written to the encoder to the underlying
* connection.
*
* @exception Exception
*/
virtual void
flush ( void ) throw ( Exception );
/**
* Close the encoding session.
*
* @exception Exception
*/
virtual void
close ( void ) throw ( Exception );
};
/* ================================================= external data structures */
/* ====================================================== function prototypes */
#endif /* VORBIS_LIB_ENCODER_H */
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