This reverts commit 9286de04.
The change broke support for legit absolute file paths.

Reported-by: Maksym Veremeyenko <verem@m1stereo.tv>.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

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

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

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

And drop the spurious newline.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

The function will grow larger as more formats are supported.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

The parser depends on hevc_ps, which in turn needs some data tables.
Found-by: James Almer <jamrial@gmail.com>

Some of the goto err clauses do not set the error code. It seems better
to fall back on INVALIDDATA instead of adding it everywhere explicitly.

This can happen in update_thread_context(), when the previous frame was
corrupted.

It only needs the parameter sets.

Particularly those that will be needed by the QSV decoder.
More can be added later as necessary.

That loop does the actual full decoding, so 'parse' can be misleading.

This function is independent of the decoding context, so we'll be able
to use it in the parser.

Also, make hls_nal_unit() work only on the provided NAL unit, without
requiring a whole decoding context.

This will allow splitting this code for reuse by the parser.

There is no need to wait until actually decoding the NALU. This will
allow to get rid of the second hls_nal_unit() call later.

Factor out the parameter sets into a separate struct and use it instead.

This will allow us to reuse this code in the parser.

It is used as get_bits argument and reading 0 bits doesn't make sense.
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

This prevents possible infinite loops with the calling code along the
lines of while (bytestream2_get_bytes_left()) { ... }, where the reader
does not advance.

CC: libav-stable@libav.org

It provides the following features:
 * verify correctness by comparing output to the C version.
 * detect failure to save and restore clobbered callee-saved registers.
 * detect 32-bit parameters being used as if they were 64-bit in x86-64
   (the upper halves are not guaranteed to be zero - but in practice
   they very often are, which makes those bugs hard to spot otherwise).
 * easy benchmarking.

Compile by running 'make checkasm'.
Execute by running 'tests/checkasm/checkasm'.

Optional arguments are '--bench' to run benchmarks for all functions,
'--bench=<pattern>' to run benchmarks for all functions that starts with
<pattern>, and '<integer>' to seed the PRNG for reproducible results.

Contains unit tests for most h264pred functions to get started, more tests
can be added afterwards using those as a reference.

Loosely based on code from x264. Currently only supports x86 and x86-64,
but additional architectures shouldn't be too much of an obstacle to add.

Note that functions with floating point parameters or floating point
return values are not supported. Some compiler-specific features or
preprocessor hacks would likely be required to add support for that.
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

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

Try to parse up to 4 packets to find the closest packet.

Reported-By: jan.schlueter@ofai.at

Properly report the sample rate as invalid

CC: libav-stable@libav.org

Tested on a Raspberry Pi.
Signed-off-by: Martin Storsjö <martin@martin.st>

flcoeffs2[pos] should be the log2 of flcoeffs1[pos].
flcoeffs1[0] can be 0 here, thus flcoeffs2[pos] gets set to -inf,
causing problems further down.

This seems to have been copied from imc_decode_level_coefficients in
commit 4eb4bb3a without updating the position.
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

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

Unbreak make checkheaders

Unbreak make checkheaders

Found-by: kropping

Improves the accuracy of measurements, especially in short sections.

To quote the Intel 64 and IA-32 Architectures Software Developer's Manual:
"The RDTSC instruction is not a serializing instruction. It does not necessarily
wait until all previous instructions have been executed before reading the counter.
Similarly, subsequent instructions may begin execution before the read operation
is performed. If software requires RDTSC to be executed only after all previous
instructions have completed locally, it can either use RDTSCP (if the processor
supports that instruction) or execute the sequence LFENCE;RDTSC."

SSE2 is a requirement for lfence so only use it on SSE2-capable systems.
Prefer lfence;rdtsc over rdtscp since rdtscp is supported on fewer systems.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>