DiskIO Class Reference

handles all the read's and write's of AudioSources in it's private thread. More...

List of all members.

Public Slots
void	seek ()
void	start_io ()
void	stop_io ()
Signals
void	seekFinished ()
void	readSourceBufferUnderRun ()
void	writeSourceBufferOverRun ()
Public Member Functions
	DiskIO (Sheet *sheet)
void	prepare_for_seek ()
void	output_rate_changed (int rate)
void	register_read_source (ReadSource *source)
void	register_write_source (WriteSource *source)
void	set_resample_quality (int quality)
void	unregister_read_source (ReadSource *source)
void	unregister_write_source (WriteSource *source)
trav_time_t	get_cpu_time ()
int	get_write_buffers_fill_status ()
int	get_read_buffers_fill_status ()
int	get_output_rate ()
int	get_resample_quality ()
DecodeBuffer *	get_resample_decode_buffer ()
Static Public Attributes
static const int	writebuffertime = 5
static const int	bufferdividefactor = 5
Friends
class	DiskIOThread

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Detailed Description

handles all the read's and write's of AudioSources in it's private thread.

Each Sheet class has it's own DiskIO instance. The DiskIO manages all the AudioSources related to a Sheet, and makes sure the RingBuffers from the AudioSources are processed in time. (It at least tries very hard)

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Member Function Documentation

void DiskIO::prepare_for_seek

(

)

Interupts any pending AudioSource's buffer processing, and returns from do_work(). Use this before calling seek() to shorten the seek process.

void DiskIO::register_read_source

(

ReadSource *

source

)

Registers the ReadSource source. The source's RingBuffer will be initialized at this point.

Note: This function is thread save.

Parameters:

source

The ReadSource to register

References AudioSource::get_channel_count(), and ReadSource::set_diskio().

void DiskIO::register_write_source

(

WriteSource *

source

)

Registers the WriteSource source. The source's RingBuffer will be initialized at this point.

Note: This function is thread save.

Parameters:

source

The WriteSource to register

References WriteSource::set_diskio().

void DiskIO::unregister_read_source

(

ReadSource *

source

)

Unregisters the ReadSource from this DiskIO instance

Note: This function is Thread save.

Parameters:

source

The ReadSource to be removed from the DiskIO instance.

trav_time_t DiskIO::get_cpu_time

(

)

Returns:

Returns the CPU time consumed by the DiskIO work thread

References RingBuffer::read(), and RingBuffer::read_space().

int DiskIO::get_write_buffers_fill_status

(

)

Get the status of the writebuffers.

Returns:

The status in procentual amount of the smallest remaining space in the writebuffers that could be used to write 'recording' data too.

References AudioDevice::get_sample_rate().

int DiskIO::get_read_buffers_fill_status

(

)

Get the status of the readbuffers.

Returns:

The status is the procentual amount of the buffer which was most empty since the last call to this function

void DiskIO::seek

(

)

[slot]

Seek's all the ReadSources readbuffers to the new position. Call prepare_seek() first, to interupt do_work() if it was running.

Parameters:

position

The position to seek too

References Sheet::get_new_transport_location(), ReadSource::rb_seek_to_file_position(), and ReadSource::set_diskio().

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The documentation for this class was generated from the following files:

• Traverso/cvs/traverso/src/core/DiskIO.h
• Traverso/cvs/traverso/buildfiles/moc_DiskIO.cxx
• Traverso/cvs/traverso/qtcreator-build/buildfiles/moc_DiskIO.cxx
• Traverso/cvs/traverso/src/core/DiskIO.cpp