org.tritonus.lowlevel.alsa
Class AlsaPcm

java.lang.Object
  org.tritonus.lowlevel.alsa.AlsaPcm

public class AlsaPcm

extends Object

TODO:

Field Summary

static int	SND_PCM_ACCESS_MMAP_COMPLEX mmap access with complex placement
static int	SND_PCM_ACCESS_MMAP_INTERLEAVED mmap access with simple interleaved channels
static int	SND_PCM_ACCESS_MMAP_NONINTERLEAVED mmap access with simple non interleaved channels
static int	SND_PCM_ACCESS_RW_INTERLEAVED snd_pcm_readi/snd_pcm_writei access
static int	SND_PCM_ACCESS_RW_NONINTERLEAVED snd_pcm_readn/snd_pcm_writen access
static int	SND_PCM_FORMAT_A_LAW
static int	SND_PCM_FORMAT_FLOAT_BE
static int	SND_PCM_FORMAT_FLOAT_LE
static int	SND_PCM_FORMAT_FLOAT64_BE
static int	SND_PCM_FORMAT_FLOAT64_LE
static int	SND_PCM_FORMAT_GSM
static int	SND_PCM_FORMAT_IEC958_SUBFRAME_BE
static int	SND_PCM_FORMAT_IEC958_SUBFRAME_LE
static int	SND_PCM_FORMAT_IMA_ADPCM
static int	SND_PCM_FORMAT_MPEG
static int	SND_PCM_FORMAT_MU_LAW
static int	SND_PCM_FORMAT_S16_BE
static int	SND_PCM_FORMAT_S16_LE
static int	SND_PCM_FORMAT_S24_BE
static int	SND_PCM_FORMAT_S24_LE
static int	SND_PCM_FORMAT_S32_BE
static int	SND_PCM_FORMAT_S32_LE
static int	SND_PCM_FORMAT_S8
static int	SND_PCM_FORMAT_SPECIAL
static int	SND_PCM_FORMAT_U16_BE
static int	SND_PCM_FORMAT_U16_LE
static int	SND_PCM_FORMAT_U24_BE
static int	SND_PCM_FORMAT_U24_LE
static int	SND_PCM_FORMAT_U32_BE
static int	SND_PCM_FORMAT_U32_LE
static int	SND_PCM_FORMAT_U8
static int	SND_PCM_FORMAT_UNKNOWN
static int	SND_PCM_START_DATA Automatic start on data read/write
static int	SND_PCM_START_EXPLICIT Explicit start
static int	SND_PCM_STATE_DRAINING Draining: running (playback) or stopped (capture)
static int	SND_PCM_STATE_OPEN Open
static int	SND_PCM_STATE_PAUSED Paused
static int	SND_PCM_STATE_PREPARED Ready to start
static int	SND_PCM_STATE_RUNNING Running
static int	SND_PCM_STATE_SETUP Setup installed
static int	SND_PCM_STATE_XRUN Stopped: underrun (playback) or overrun (capture) detected
static int	SND_PCM_STREAM_CAPTURE Capture stream
static int	SND_PCM_STREAM_PLAYBACK
static int	SND_PCM_TSTAMP_MMAP Update mmap'ed timestamp
static int	SND_PCM_TSTAMP_NONE No timestamp
static int	SND_PCM_XRUN_NONE Xrun detection disabled
static int	SND_PCM_XRUN_STOP Stop on xrun detection

Constructor Summary

AlsaPcm(String strPcmName, int nDirection, int nMode)
For parameter documentation, see open().

Method Summary

int	close() Calls snd_pcm_close().
int	getAnyHWParams(AlsaPcmHWParams hwParams) Calls snd_pcm_hw_params_any().
int	getSWParams(AlsaPcmSWParams swParams)
long	readi(byte[] abBuffer, long lOffset, long lFrameCount)
int	setHWParams(AlsaPcmHWParams hwParams) Calls snd_pcm_hw_params().
int	setHWParamsAccess(AlsaPcmHWParams hwParams, int nAccess) Calls snd_pcm_hw_params_set_access().
int	setHWParamsBufferTimeNear(AlsaPcmHWParams hwParams, int nBufferTime) Calls snd_pcm_hw_params_set_buffer_time_near().
int	setHWParamsChannels(AlsaPcmHWParams hwParams, int nChannels) Calls snd_pcm_hw_params_set_channels().
int	setHWParamsFormat(AlsaPcmHWParams hwParams, int nFormat) Calls snd_pcm_hw_params_set_format().
int	setHWParamsFormatMask(AlsaPcmHWParams hwParams, AlsaPcmHWParamsFormatMask mask) Calls snd_pcm_hw_params_set_format_mask().
int	setHWParamsPeriodTimeNear(AlsaPcmHWParams hwParams, int nPeriodTime) Calls snd_pcm_hw_params_set_period_time_near().
int	setHWParamsRateNear(AlsaPcmHWParams hwParams, int nRate) Calls snd_pcm_hw_params_set_rate_near().
int	setSWParams(AlsaPcmSWParams swParams)
int	setSWParamsAvailMin(AlsaPcmSWParams swParams, int n)
int	setSWParamsSilenceSize(AlsaPcmSWParams swParams, int n)
int	setSWParamsSilenceThreshold(AlsaPcmSWParams swParams, int n)
int	setSWParamsSleepMin(AlsaPcmSWParams swParams, int n)
int	setSWParamsStartMode(AlsaPcmSWParams swParams, int n)
int	setSWParamsStartThreshold(AlsaPcmSWParams swParams, int n)
int	setSWParamsStopThreshold(AlsaPcmSWParams swParams, int n)
int	setSWParamsTStampMode(AlsaPcmSWParams swParams, int n)
int	setSWParamsXferAlign(AlsaPcmSWParams swParams, int n)
int	setSWParamsXrunMode(AlsaPcmSWParams swParams, int n)
static void	setTrace(boolean bTrace)
long	writei(byte[] abBuffer, long lOffset, long lFrameCount)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SND_PCM_STREAM_PLAYBACK

public static final int SND_PCM_STREAM_PLAYBACK

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Constant Field Values

SND_PCM_STREAM_CAPTURE

public static final int SND_PCM_STREAM_CAPTURE

Capture stream

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Constant Field Values

SND_PCM_ACCESS_MMAP_INTERLEAVED

public static final int SND_PCM_ACCESS_MMAP_INTERLEAVED

mmap access with simple interleaved channels

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Constant Field Values

SND_PCM_ACCESS_MMAP_NONINTERLEAVED

public static final int SND_PCM_ACCESS_MMAP_NONINTERLEAVED

mmap access with simple non interleaved channels

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Constant Field Values

SND_PCM_ACCESS_MMAP_COMPLEX

public static final int SND_PCM_ACCESS_MMAP_COMPLEX

mmap access with complex placement

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SND_PCM_ACCESS_RW_INTERLEAVED

public static final int SND_PCM_ACCESS_RW_INTERLEAVED

snd_pcm_readi/snd_pcm_writei access

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Constant Field Values

SND_PCM_ACCESS_RW_NONINTERLEAVED

public static final int SND_PCM_ACCESS_RW_NONINTERLEAVED

snd_pcm_readn/snd_pcm_writen access

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Constant Field Values

SND_PCM_FORMAT_UNKNOWN

public static final int SND_PCM_FORMAT_UNKNOWN

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SND_PCM_FORMAT_S8

public static final int SND_PCM_FORMAT_S8

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SND_PCM_FORMAT_U8

public static final int SND_PCM_FORMAT_U8

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SND_PCM_FORMAT_S16_LE

public static final int SND_PCM_FORMAT_S16_LE

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SND_PCM_FORMAT_S16_BE

public static final int SND_PCM_FORMAT_S16_BE

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SND_PCM_FORMAT_U16_LE

public static final int SND_PCM_FORMAT_U16_LE

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SND_PCM_FORMAT_U16_BE

public static final int SND_PCM_FORMAT_U16_BE

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Constant Field Values

SND_PCM_FORMAT_S24_LE

public static final int SND_PCM_FORMAT_S24_LE

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SND_PCM_FORMAT_S24_BE

public static final int SND_PCM_FORMAT_S24_BE

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SND_PCM_FORMAT_U24_LE

public static final int SND_PCM_FORMAT_U24_LE

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SND_PCM_FORMAT_U24_BE

public static final int SND_PCM_FORMAT_U24_BE

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SND_PCM_FORMAT_S32_LE

public static final int SND_PCM_FORMAT_S32_LE

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SND_PCM_FORMAT_S32_BE

public static final int SND_PCM_FORMAT_S32_BE

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SND_PCM_FORMAT_U32_LE

public static final int SND_PCM_FORMAT_U32_LE

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SND_PCM_FORMAT_U32_BE

public static final int SND_PCM_FORMAT_U32_BE

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SND_PCM_FORMAT_FLOAT_LE

public static final int SND_PCM_FORMAT_FLOAT_LE

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SND_PCM_FORMAT_FLOAT_BE

public static final int SND_PCM_FORMAT_FLOAT_BE

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SND_PCM_FORMAT_FLOAT64_LE

public static final int SND_PCM_FORMAT_FLOAT64_LE

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SND_PCM_FORMAT_FLOAT64_BE

public static final int SND_PCM_FORMAT_FLOAT64_BE

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Constant Field Values

SND_PCM_FORMAT_IEC958_SUBFRAME_LE

public static final int SND_PCM_FORMAT_IEC958_SUBFRAME_LE

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SND_PCM_FORMAT_IEC958_SUBFRAME_BE

public static final int SND_PCM_FORMAT_IEC958_SUBFRAME_BE

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SND_PCM_FORMAT_MU_LAW

public static final int SND_PCM_FORMAT_MU_LAW

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Constant Field Values

SND_PCM_FORMAT_A_LAW

public static final int SND_PCM_FORMAT_A_LAW

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Constant Field Values

SND_PCM_FORMAT_IMA_ADPCM

public static final int SND_PCM_FORMAT_IMA_ADPCM

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Constant Field Values

SND_PCM_FORMAT_MPEG

public static final int SND_PCM_FORMAT_MPEG

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SND_PCM_FORMAT_GSM

public static final int SND_PCM_FORMAT_GSM

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SND_PCM_FORMAT_SPECIAL

public static final int SND_PCM_FORMAT_SPECIAL

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Constant Field Values

SND_PCM_STATE_OPEN

public static final int SND_PCM_STATE_OPEN

Open

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SND_PCM_STATE_SETUP

public static final int SND_PCM_STATE_SETUP

Setup installed

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SND_PCM_STATE_PREPARED

public static final int SND_PCM_STATE_PREPARED

Ready to start

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SND_PCM_STATE_RUNNING

public static final int SND_PCM_STATE_RUNNING

Running

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SND_PCM_STATE_XRUN

public static final int SND_PCM_STATE_XRUN

Stopped: underrun (playback) or overrun (capture) detected

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Constant Field Values

SND_PCM_STATE_DRAINING

public static final int SND_PCM_STATE_DRAINING

Draining: running (playback) or stopped (capture)

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Constant Field Values

SND_PCM_STATE_PAUSED

public static final int SND_PCM_STATE_PAUSED

Paused

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Constant Field Values

SND_PCM_START_DATA

public static final int SND_PCM_START_DATA

Automatic start on data read/write

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Constant Field Values

SND_PCM_START_EXPLICIT

public static final int SND_PCM_START_EXPLICIT

Explicit start

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Constant Field Values

SND_PCM_XRUN_NONE

public static final int SND_PCM_XRUN_NONE

Xrun detection disabled

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Constant Field Values

SND_PCM_XRUN_STOP

public static final int SND_PCM_XRUN_STOP

Stop on xrun detection

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Constant Field Values

SND_PCM_TSTAMP_NONE

public static final int SND_PCM_TSTAMP_NONE

No timestamp

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Constant Field Values

SND_PCM_TSTAMP_MMAP

public static final int SND_PCM_TSTAMP_MMAP

Update mmap'ed timestamp

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Constant Field Values

Constructor Detail

AlsaPcm

public AlsaPcm(String strPcmName,
               int nDirection,
               int nMode)
        throws Exception

For parameter documentation, see open().

Throws:

Exception

Method Detail

close

public int close()

Calls snd_pcm_close().

getAnyHWParams

public int getAnyHWParams(AlsaPcmHWParams hwParams)

Calls snd_pcm_hw_params_any().

setHWParamsAccess

public int setHWParamsAccess(AlsaPcmHWParams hwParams,
                             int nAccess)

Calls snd_pcm_hw_params_set_access().

setHWParamsFormat

public int setHWParamsFormat(AlsaPcmHWParams hwParams,
                             int nFormat)

Calls snd_pcm_hw_params_set_format().

setHWParamsFormatMask

public int setHWParamsFormatMask(AlsaPcmHWParams hwParams,
                                 AlsaPcmHWParamsFormatMask mask)

Calls snd_pcm_hw_params_set_format_mask().

setHWParamsChannels

public int setHWParamsChannels(AlsaPcmHWParams hwParams,
                               int nChannels)

Calls snd_pcm_hw_params_set_channels().

setHWParamsRateNear

public int setHWParamsRateNear(AlsaPcmHWParams hwParams,
                               int nRate)

Calls snd_pcm_hw_params_set_rate_near().

setHWParamsBufferTimeNear

public int setHWParamsBufferTimeNear(AlsaPcmHWParams hwParams,
                                     int nBufferTime)

Calls snd_pcm_hw_params_set_buffer_time_near().

setHWParamsPeriodTimeNear

public int setHWParamsPeriodTimeNear(AlsaPcmHWParams hwParams,
                                     int nPeriodTime)

Calls snd_pcm_hw_params_set_period_time_near().

setHWParams

public int setHWParams(AlsaPcmHWParams hwParams)

Calls snd_pcm_hw_params().

getSWParams

public int getSWParams(AlsaPcmSWParams swParams)

setSWParamsStartMode

public int setSWParamsStartMode(AlsaPcmSWParams swParams,
                                int n)

setSWParamsXrunMode

public int setSWParamsXrunMode(AlsaPcmSWParams swParams,
                               int n)

setSWParamsTStampMode

public int setSWParamsTStampMode(AlsaPcmSWParams swParams,
                                 int n)

setSWParamsSleepMin

public int setSWParamsSleepMin(AlsaPcmSWParams swParams,
                               int n)

setSWParamsAvailMin

public int setSWParamsAvailMin(AlsaPcmSWParams swParams,
                               int n)

setSWParamsXferAlign

public int setSWParamsXferAlign(AlsaPcmSWParams swParams,
                                int n)

setSWParamsStartThreshold

public int setSWParamsStartThreshold(AlsaPcmSWParams swParams,
                                     int n)

setSWParamsStopThreshold

public int setSWParamsStopThreshold(AlsaPcmSWParams swParams,
                                    int n)

setSWParamsSilenceThreshold

public int setSWParamsSilenceThreshold(AlsaPcmSWParams swParams,
                                       int n)

setSWParamsSilenceSize

public int setSWParamsSilenceSize(AlsaPcmSWParams swParams,
                                  int n)

setSWParams

public int setSWParams(AlsaPcmSWParams swParams)

writei

public long writei(byte[] abBuffer,
                   long lOffset,
                   long lFrameCount)

Parameters:

lOffset - Offset where the data should be read from the buffer, in bytes.

lFrameCount - Length of the data to write, in number of PCM frames.

readi

public long readi(byte[] abBuffer,
                  long lOffset,
                  long lFrameCount)

setTrace

public static void setTrace(boolean bTrace)