paraslash/write.h, branch v0.3

wng: Avoid buffer underruns due to filter chain output buffer constraints.

2009-11-05T21:42:52Z

Using ogg vorbis streams together with the oss writer hits the following nasty bug: In case the filter chain can provide more data than what fits into its output buffer, it converts the maximal amount possible to completely fill its output buffer. However, the time to play this data might be less than than the time until the next data packet arrives from the upper layers, especially when using ogg vorbis streams and FEC. Since the filter chain task has no pre_select function, the convert function(s) of its filter nodes only get the chance to convert more data until the next select call returns, which might already be too late. This patch fixes the bug by teaching the pre_select function of the writer node group to remember whether something was written during the previous call to wng_post_select(). In this case we force a minimal timeout for select, i.e. the next call to select() will return immediately and the convert functions of the filter node are called again, hopefully converting more data for the writer node group.

struct writer_node: Store the number of the writer rather than a pointer.

2009-05-14T06:34:06Z

This makes it easier to get the name of the writer from the writer_node struct.

Use only a single buffer pointer for filters/receivers.

2009-05-02T09:46:46Z

This allows filters to change the output buffer size on the fly.

write: Get rid of wn->chunk_bytes and wng->max_chunk_bytes.

2009-03-15T16:14:50Z

These are not used anyway. Make all writers return 1 on success.

Fix a typo in the documentation to struct writer.

2009-03-12T20:38:07Z

Change year of copyright from 2008 to 2009.

2009-01-10T00:53:18Z

Improve help/man page of para_write.

2008-12-06T13:37:03Z

Replace MAX, MIN, ABS macros by type-checking variants.

2008-12-01T15:51:37Z

Taken from the Linux kernel. These macros also evaluate each parameter only once. Fix up all resulting gcc warnings.

write.h: Cosmetics.

2008-11-28T21:04:54Z

Fix a bug in para_write.

2008-07-12T10:40:36Z

With the old code, the command "para_write < /dev/null" would segfault because the wng_close() is called although the writer node group was never opened. Fix this bug by introducing a new field in struct writer_node_group that tracks whether wng_open() was called.