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added interface for variable bitrate encoding

This commit is contained in:
darkeye 2002-03-28 16:39:32 +00:00
parent f96c7969eb
commit c326ebfac1
1 changed files with 109 additions and 7 deletions
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116
darkice/trunk/src/AudioEncoder.h
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@ -80,10 +80,15 @@ class AudioEncoder : public Sink, public virtual Referable
bool inBigEndian; bool inBigEndian;
/** /**
* Bit rate of the output. (bits/sec) * Bit rate of the output in kbits/sec, for fixed bitrate encodings.
*/ */
unsigned int outBitrate; unsigned int outBitrate;
/**
* Quality of the output, for variable bitrate encodings.
*/
double outQuality;
/** /**
* Sample rate of the output. * Sample rate of the output.
*/ */
@ -112,6 +117,7 @@ class AudioEncoder : public Sink, public virtual Referable
unsigned int inChannel, unsigned int inChannel,
bool inBigEndian, bool inBigEndian,
unsigned int outBitrate, unsigned int outBitrate,
float outQuality,
unsigned int outSampleRate, unsigned int outSampleRate,
unsigned int outChannel ) throw ( Exception ) unsigned int outChannel ) throw ( Exception )
{ {
@ -120,6 +126,7 @@ class AudioEncoder : public Sink, public virtual Referable
this->inChannel = inChannel; this->inChannel = inChannel;
this->inBigEndian = inBigEndian; this->inBigEndian = inBigEndian;
this->outBitrate = outBitrate; this->outBitrate = outBitrate;
this->outQuality = outQuality;
this->outSampleRate = outSampleRate; this->outSampleRate = outSampleRate;
this->outChannel = outChannel; this->outChannel = outChannel;
} }
@ -149,13 +156,13 @@ class AudioEncoder : public Sink, public virtual Referable
} }
/** /**
* Constructor. * Constructor for fixed bitrate encoding.
* *
* @param inSampleRate sample rate of the input. * @param inSampleRate sample rate of the input.
* @param inBitsPerSample number of bits per sample of the input. * @param inBitsPerSample number of bits per sample of the input.
* @param inChannel number of channels of the input. * @param inChannel number of channels of the input.
* @param inBigEndian shows if the input is big or little endian * @param inBigEndian shows if the input is big or little endian
* @param outBitrate bit rate of the output (bits/sec). * @param outBitrate bit rate of the output (kbits/sec).
* @param outSampleRate sample rate of the output. * @param outSampleRate sample rate of the output.
* If 0, inSampleRate is used. * If 0, inSampleRate is used.
* @param outChannel number of channels of the output. * @param outChannel number of channels of the output.
@ -166,7 +173,7 @@ class AudioEncoder : public Sink, public virtual Referable
AudioEncoder ( unsigned int inSampleRate, AudioEncoder ( unsigned int inSampleRate,
unsigned int inBitsPerSample, unsigned int inBitsPerSample,
unsigned int inChannel, unsigned int inChannel,
bool inBigEndian, bool inBigEndian,
unsigned int outBitrate, unsigned int outBitrate,
unsigned int outSampleRate = 0, unsigned int outSampleRate = 0,
unsigned int outChannel = 0 ) unsigned int outChannel = 0 )
@ -177,16 +184,51 @@ class AudioEncoder : public Sink, public virtual Referable
inChannel, inChannel,
inBigEndian, inBigEndian,
outBitrate, outBitrate,
0.0,
outSampleRate ? outSampleRate : inSampleRate, outSampleRate ? outSampleRate : inSampleRate,
outChannel ? outChannel : inChannel ); outChannel ? outChannel : inChannel );
} }
/** /**
* Constructor. * Constructor for variable bitrate encoding.
*
* @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 outQuality the quality of the stream.
* @param outSampleRate sample rate of the output.
* If 0, inSampleRate is used.
* @param outChannel number of channels of the output.
* If 0, inChannel is used.
* @exception Exception
*/
inline
AudioEncoder ( unsigned int inSampleRate,
unsigned int inBitsPerSample,
unsigned int inChannel,
bool inBigEndian,
double outQuality,
unsigned int outSampleRate = 0,
unsigned int outChannel = 0 )
throw ( Exception )
{
init ( inSampleRate,
inBitsPerSample,
inChannel,
inBigEndian,
0,
outQuality,
outSampleRate ? outSampleRate : inSampleRate,
outChannel ? outChannel : inChannel );
}
/**
* Constructor for fixed bitrate encoding.
* *
* @param as get input sample rate, bits per sample and channels * @param as get input sample rate, bits per sample and channels
* from this AudioSource. * from this AudioSource.
* @param outBitrate bit rate of the output (bits/sec). * @param outBitrate bit rate of the output (kbits/sec).
* @param outSampleRate sample rate of the output. * @param outSampleRate sample rate of the output.
* If 0, input sample rate is used. * If 0, input sample rate is used.
* @param outChannel number of channels of the output. * @param outChannel number of channels of the output.
@ -205,6 +247,36 @@ class AudioEncoder : public Sink, public virtual Referable
as->getChannel(), as->getChannel(),
as->isBigEndian(), as->isBigEndian(),
outBitrate, outBitrate,
0.0,
outSampleRate ? outSampleRate : as->getSampleRate(),
outChannel ? outChannel : as->getChannel() );
}
/**
* Constructor for variable bitrate encoding.
*
* @param as get input sample rate, bits per sample and channels
* from this AudioSource.
* @param outQuality the quality of the stream.
* @param outSampleRate sample rate of the output.
* If 0, input sample rate is used.
* @param outChannel number of channels of the output.
* If 0, input channel is used.
* @exception Exception
*/
inline
AudioEncoder ( const AudioSource * as,
double outQuality,
unsigned int outSampleRate = 0,
unsigned int outChannel = 0 )
throw ( Exception)
{
init( as->getSampleRate(),
as->getBitsPerSample(),
as->getChannel(),
as->isBigEndian(),
0,
outQuality,
outSampleRate ? outSampleRate : as->getSampleRate(), outSampleRate ? outSampleRate : as->getSampleRate(),
outChannel ? outChannel : as->getChannel() ); outChannel ? outChannel : as->getChannel() );
} }
@ -222,6 +294,7 @@ class AudioEncoder : public Sink, public virtual Referable
encoder.inChannel, encoder.inChannel,
encoder.inBigEndian, encoder.inBigEndian,
encoder.outBitrate, encoder.outBitrate,
encoder.outQuality,
encoder.outSampleRate, encoder.outSampleRate,
encoder.outChannel ); encoder.outChannel );
} }
@ -244,6 +317,7 @@ class AudioEncoder : public Sink, public virtual Referable
encoder.inChannel, encoder.inChannel,
encoder.inBigEndian, encoder.inBigEndian,
encoder.outBitrate, encoder.outBitrate,
encoder.outQuality,
encoder.outSampleRate, encoder.outSampleRate,
encoder.outChannel ); encoder.outChannel );
} }
@ -332,7 +406,8 @@ class AudioEncoder : public Sink, public virtual Referable
} }
/** /**
* Get the bit rate of the output. (bits/sec) * Get the bit rate of the output in kbits/sec, for fixed bitrate
* encodings.
* *
* @return the bit rate of the output. * @return the bit rate of the output.
*/ */
@ -342,6 +417,30 @@ class AudioEncoder : public Sink, public virtual Referable
return outBitrate; return outBitrate;
} }
/**
* Get the encoding quality of the output, for variable bitrate
* encodings.
*
* @return the encoding quality of the output.
*/
inline double
getOutQuality ( void ) const throw ()
{
return outQuality;
}
/**
* Tell if this encoding is fixed bitrate or variable bitrate.
*
* @return <code>true</code> if this encoding is variable bitrate,
* <code>false</code> if fixed bitrate.
*/
inline bool
isVBR ( void ) const throw ()
{
return outBitrate == 0;
}
/** /**
* Check wether encoding is in progress. * Check wether encoding is in progress.
* *
@ -385,6 +484,9 @@ class AudioEncoder : public Sink, public virtual Referable
$Source$ $Source$
$Log$ $Log$
Revision 1.6 2002/03/28 16:39:32 darkeye
added interface for variable bitrate encoding
Revision 1.5 2002/02/19 15:23:59 darkeye Revision 1.5 2002/02/19 15:23:59 darkeye
fixed typo fixed typo