Data is stored in separated components so rework decode_rle() to support
stepping and offsets.

Quickdraw packs data as a series of codes that the application is supposed
to handle, but it does not define any order in which they might appear.
Since it's unfeasible to support *all* opcodes defined by the spec,
only handle well-known blocks containing video data and ignore any unknown
or unsupported ones.

Move palette loading and rle decoding to separate functions to resue them
in other blocks and drop format initialization in init since it can
support more formats than pal8.

Validate width and height.

Add appropriate error messages and reduce r, g, b variables scope.
Drop the now redundant line checks in RLE decoding.

Introduced in e8c4db0d.

This reverts commit 63be97ec.

All those calls were unchecked on purpose, as explained in the comments
in the code.

For max_order = 0 the clipping range is invalid. (amin = 2, amax = 1)

CC: libav-stable@libav.org
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Also change the type of begin, end and smp to ptrdiff_t to make the
comparison well-defined.

CC: libav-stable@libav.org
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

The minimum of the ath(x, ATH_ADD) function depends on ATH_ADD.
This patch uses the first order approximation to determine it.

For ATH_ADD = 4 this results in the value at 3407.06812 (-5.24241638)
not the one at 3410 (-5.24237967).

CC: libav-stabl@libav.org
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

avctx->bits_per_raw_sample is used in get_sbits_long, which only
supports up to 32 bits.

CC: libav-stable@libav.org
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

CC: libav-stable@libav.org
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Only MSVC 2010 in x64 mode, in the static msvcrt, had a
stray log2 function (which wasn't available in the headers).

MSVC 2013 has got a proper log2 function though.
Signed-off-by: Martin Storsjö <martin@martin.st>

$cc is the compiler requested as main target compiler, while $_cc
is the actual tool tested in the probe function right now (which
can also be e.g. the host compiler).
Signed-off-by: Martin Storsjö <martin@martin.st>

This is printed in a separate subgroup "displaymatrix" inside a
new group named "sidedata". The subgroup has got two values,
"rotation" (which is the parsed rotation from the matrix) and
"matrix" containing the full actual values.
Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>

The option is enabled by default, but can be disabled.

If this is enabled, such side data isn't copied into the output stream
(except when doing stream copy).
Signed-off-by: Martin Storsjö <martin@martin.st>

This is enabled by default, but can be disbled via the -noautorotate
option.

Based on a patch by Clément Bœsch.
Signed-off-by: Martin Storsjö <martin@martin.st>

Significantly based on a patch by Clément Bœsch.
Signed-off-by: Martin Storsjö <martin@martin.st>

Regression introduced in 598f7d04.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

warning: assigning to 'AVFrame *' (aka 'struct AVFrame *') from
         'const AVFrame *' (aka 'const struct AVFrame *') discards
         qualifiers [-Wincompatible-pointer-types-discards-qualifiers]

Initialize `diff` to 0.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

And notify why the capture is impossible.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

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

It now has a fixed size and is initialized only once, so there is no
point in allocating it separately.

There is no real need to handle the init case specially, everything
necessary is initialized in the reinit code as well.

It is only used to decide whether to call free_tables(), but that
function is safe to call on an uninitialized context as well.

With frame threading, it is currently only updated in the context where
the change occurs, but not in any other contexts.

It does not make sense to copy is_avc without copying this as well. This
patch should not change anything for now, but will have an effect in
later commits.

It does not logically belong in free_tables(), since it's not allocated
in alloc_tables() and its size has nothing to do with the frame size.

That function currently does two things -- reinitializing the DSP
contexts and setting low_delay based on the SPS values.

The former more appropriately belongs in h264_slice_header_init(), while
the latter only really makes sense in decode_slice_header().

The third call to ff_h264_set_parameter_from_sps(), done immediately
after parsing a new SPS, appears to serve no useful purpose, so it is
just dropped.

Also, drop now unneeded H264Context.cur_chroma_format_idc.

It uses some fields from the SPS, which is not yet set where the reinit
is called currently.

Currently, the DPB is initialized in alloc_tables() and uninitialized in
free_tables(), but those functions manage frame size-dependent
variables, so DPB management does not logically belong in there.

Since we want the init/uninit to happen exactly once per the context
lifetime, init_context()/free_context() are the proper place for this
code.

It is only set, but never used for anything.

It is not needed anymore since switching to refcounted frames.

Fixes the corner case in which the internal buffer size
is larger than input buffer provided and resizing it
before moving the left over samples would make it write
to now unallocated memory.

Bug-Id: 825
CC: libav-stable@libav.org
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

If a PAT is finished while a PMT section filter is opened but
not yet finished, the PMT section filter is closed and all
the received data is discarded.

This is usually not an issue but some multiplexers (With very
quick PAT/PMT repetition settings) consistently emit a PMT
section start, then a PAT, and then the rest of the PMT,
causing the aforementioned behavior to result in no PMT being
finished.

In the most pathologic situation the stream information are lost
and the probe fallback miscategorizes subtitles as mp3 audio.

Avoid the issue through eliminating redundant PSI/SI table
updates by checking their version field, which is required by
the standard to be incremented on every change no matter how
minor.

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