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The current implementation keeps references to VO_NUM_RECENT_FRAMES
frames (for deinterlacing), but doesn't make any use of them.
As many XXMC capable devices only supply 8 frames at all, keeping
fewer frames referenced makes more available for decoding and thus
avoids frame drops by keeping the number of frames which are ready
for display more often above frame_drop_limit.
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The current code misses the ability to switch back to an
unaccelerated context, e. g. when previously MPEG2 material
was displayed which is then followed by H.264 material. As
the latter is not handled as XINE_IMGFMT_XXMC there was no
way to leave the accelerated context and therefore the images
did not appear on screen.
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This function shall be used to poll the number of remaining frames
from a certain point in time on until the reported numbers are all
0. At that point in time, the content on screen is identical to a
certain state of the stream, at which for example, a hardcopy may
be taken.
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The current code has a race condition which can block arbitrary
threads that call for example xine_get_current_frame() until the
stream gets unpaused again. This can happen when the internal
ticket acquiration collides with a ticket revokation for example
when another thread is going to pause the stream.
There are a few situations where a port ticket needs to be
acquired for calling a port function but where it is absolutely
undesireable to get blocked for an undetermined period of time.
Therefore the ticket system should be extended by nonblocking
functions which allow ticket acquiration even when a ticket
revokation is in progress. And in the case where blocking is
not avoidable, it should simply be indicated that no ticket was
acquired. The caller can then choose to repeat the call at a
later point in time.
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discover X libraries.
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The current code implements hardware (a shift register) in software
just to find the byte pattern 00 00 01 xx, which causes remarkable
CPU load on less powerful machines.
The new approach uses memchr() to find the 01 in the buffer, which
most often hits a start code. memchr() seems to be even faster then
implementing a real pattern search (i. e. by just looking at every
third byte to find 01). The new implementation causes significantly
fewer CPU load on less powerful machines.
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The current code emits a frame when a non slice start code is seen.
For still frames, this is typically a sequence end code. But the
current code doesn't call parse_chunk() immediately because it waits
for a further start code to determine the chunk of data to pass to
parse_chunk(). But there isn't such a further start code for still
frames after the sequence end code and thus, the still frame will
not be emitted.
As sequence end code is the only start code which has no data
according to the MPEG specification, let's use this information
to call parse_chunk() immediately.
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The current code cannot detect the absence of AFD once it has been
seen in the stream. As AFD can appear in user data after sequence,
group or picture start codes, the idea is to reset the stored AFD
value when processing the sequence start code. In the case where
AFD is seen in user data, it is stored internally, to have it ready
when the first slice is processed. At least at that time, AFD data
has been seen and can be analyzed for changes. At any change, the
AFD value will then be stored into a stream property. Doing this
only for changes avoids locks while writing the same value over and
over to the stream's property.
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determination.
The current code detects MPEG2 when parsing the sequence extention
which appears only in MPEG2 streams. But this is to late for correct
aspect ratio determination which happens earlier and therefore
assumes MPEG1. The result is a totally wrong aspect ratio.
To fix this issue, the next start code (which is already available
at that time) is passed to parse_chunk() too, which can then be
used to detect a MPEG2 extension start code early enough before
the aspect ratio is determined.
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throwing off the test.
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pthread_create.
The link is needed to make sure that the LIBS variable is set correctly, otherwise it might just be finding the definition but using the wrong link-time parameter.
Also, feed proper parameters to pthread_create to avoid -Wnonnull to cause a test failure (GCC/GLIBC).
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as needed for some files where gcc runs out of registers otherwise.
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This fixes linkage problems for people who want this but don't want X.
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Altivec code.
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Two of the modified files are headers, but each contains definitions as well as
declarations and is only ever used once.
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to be video_overlay.
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get along that well.
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libdir for plugins installation.
With this change, it avoids running an egrep command for every directory
at uninstall time; the for has way less impact as the list can just be
empty.
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This reduces the number of objects that are allowed to contain
TEXT section relocations (skipping for instance libxine and the
vidix drivers).
This is still suboptimal because only those plugins that actually
contains text relocation should be allowed to contain them (that
is what is done with IMPURE_TEXT_LDFLAGS for Solaris and Darwin).
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correct location.
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Together with this, define a xinepost_LTLIBRARIES class that is used
to install the post-plugins in the correct directory.
Also add the rule to remove them.
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Checked snd_pcm_delay return code, and don't trust negative values.
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rescanned now.
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