Split normal build system documentation and the fate one.

Document THREADS make variable and provide an introduction to fate.
Document DESTDIR make variable and add some generic targets.

When a normal Block is parsed, duration is initialized to
AV_NOPTS_VALUE.  If it is not changed, then the track's default
duration is used.  But for SimpleBlock, duration is initialized to
0 instead of AV_NOPTS_VALUE.  This is due to the difference in how
EBML_NEST vs EBML_PASS are processed.  Setting duration to 0 leads
eventually to wrongly estimate the frame duration in util.c

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

When -std=c99 is used, GCC defines __STRICT_ANSI__ to hide non-ANSI
interfaces; on MinGW32, when this macro is defined, some functions that are
part of POSIX but not of Windows APIs are disabled, including strcasecmp().

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

The length argument should be unsigned.  No change in code.

Signed-off-by: Mans Rullgard <mans@mansr.com>

This moves the check for --as-needed linker support before all
library tests, ensuring consistent behaviour between the checks
and the actual link step.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Mans Rullgard <mans@mansr.com>

Fixes "make THREADS=2 fate-mpeg2-field-enc".

The normal dependency tracking system disables them just fine.

It is automatically disabled on both mingw and dos due to
the lack of fork.

This was missed when ASF was changed to return timestamps
without preroll.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Signed-off-by: Mans Rullgard <mans@mansr.com>

With unknown attribute warnings disabled, these checks are no
longer needed.  Removing them improves readability while having
no effect on generated code.

Signed-off-by: Mans Rullgard <mans@mansr.com>

ICC lies about the version of gcc it emulates, which results
in unsupported attributes sometimes being used.  The warning
is an annoyance and should be disabled.

Signed-off-by: Mans Rullgard <mans@mansr.com>

In this particular case, we aren't ever printing anything else than
0.000 anyway.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This fixes shared library versioning after 3dd851c.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This also fixes broken SBR detection, which produced files with double
sample rate since 8ae0fa2.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

The format string was locale-depending.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

in the ac3_fixed encoder.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

The correct machine name for dlltool is arm-wince.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Factor ffmpeg calls using run_ffmpeg()

Add a THREADS variable to fate calls.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Fixes --disable-everything --enable-decoder=ac3

Signed-off-by: Mans Rullgard <mans@mansr.com>

This allows the AC-3 decoder to be used directly with RealMedia
decoders that unlike the libavformat one do not byte-swap automatically.
Since the new code is only used in case we would fail directly otherwise
there should be no risk for regressions.

Depending on error_recognition is not correct, low values do
certainly not mean it is ok to crash.

Based on a patch by Reimar Döffinger <Reimar.Doeffinger@gmx.de>

The Atom has SSSE3 support, which is useful in many cases, but sometimes the
SSSE3 version is slower than the SSE2 equivalent on the Atom, but is generally
faster on other processors supporting SSSE3. This flag allows for selectively
disabling certain SSSE3 functions on the Atom.

fixes issue2649.

It's pointless, since there's a seek to the end of tag later.

Conio.h is a non-standard header and may not have kbhit()
prototyped. This fixes compile on OS/2 where the EMX version (we're
using a fork) of conio.h only has getch() and getche().

Signed-off-by: Mans Rullgard <mans@mansr.com>

This updates the wmv8-drm reference after c47d383.

Signed-off-by: Mans Rullgard <mans@mansr.com>

This is required for the generated .lib file to actually
be usable by MSVC.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

This makes the amr demuxer support seeking, closing roundup
issue 2593.

Previously, the field pointed to the second byte of the packet
(which is the first byte of the actual AMR payload).

This allows libavformat to guess an estimated duration for
amr files.

For streams with varying bit rates (or with silence descriptors
or "no frame" blocks) the guess is, of course, inaccurate.