_stdint.h is generated by Autotools and we don't really need it. All
supported platforms now ship with stdint.h. The only stickler was MSVC,
and since Visual Studio 2015 it also ships stdint.h now.
a52_init initializes the IMDCT global state as well as creating
a new state. When two A52 decoders are created (eg, when two AC3
tracks are contained in a video), calls to a52_init may happen
at the same time, and the IMDCT initialization is not reentrant.
https://bugzilla.gnome.org/show_bug.cgi?id=746781
gst_buffer_extract returns the number of bytes extracted, here 2 max.
Set size to the buffer size as was done in 0.10 to avoid first_access
error when it bypass 2.
https://bugzilla.gnome.org/show_bug.cgi?id=673434
and use fixed caps on the srcpad. To correctly support
upstream renegotiation a52dec would need to check if the
caps of the downstream allocated buffer are the requested
caps or if the size is different.
Fixes bug #665989.
liba52 in a52dec-0.7.4 does not have any MMX, MMXEXT or 3DNOW based
IMDCT transform acceleration. It does however have a software based
acceleration using the djbfft library (D.J. Bernstein's library for
fourier transforms - Extremely fast library for floating-point
convolution). So allow liba52 to use it through the MM_ACCEL_DJBFFT
flag.
The liba52 copy in MPlayer sources does have SSE, 3dnowext, 3dnow
and AltiVec implementations, but those are checked for first, and
djbfft is chosen only if none of those is available - good in the
case of some distributions including a port of the MPlayer changes
in their system a52dec library.
The down and upmix code in liba52 doesn't seem to be disturbed by
this additional MM_ACCEL flag and will still use MMX, SSE or 3DNOW
versions if passed from oil_cpu_get_flags (SSE currently is not).
Fixes bug #592787.
Perform some cleanups based on the dtsdec code such as using the boilerplate
macro and static pad template functions.
Add some documentation. Don't register a change in flags until we synch on
another frame successfully.
Original commit message from CVS:
* ext/a52dec/gsta52dec.c:
* ext/a52dec/gsta52dec.h:
Fix channel re-negotiation on a change of the incoming stream.
Patch By: Thijs Vermeir <thijsvermeir@gmail.com>
Fixes: #551660
Original commit message from CVS:
* ext/a52dec/gsta52dec.c:
Set up a default time segment for output when receiving
an incoming byte segment (as for raw AC3 files).
Fixes: #548194
