Replace our incomplete w32threads implementation with x264's pthreads
w32threads wrapper.
Relicensed to LGPL with kind permission by Pegasys Inc.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

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

The size check must be updated to take into account both manners
in which v_data_size might be set.

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

The pixel format is not known until the frame header is parsed.
Guessing it here only causes trouble for the caller if the guess
turns out to be wrong (and actually causes very wrong output by
avconv/avplay).

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

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

This also allows for removing some of the buf_size checks and using the
sample count for some of the decoding loops.

ADPCM IMA WAV decoder.

There are still 2 nibbles to decode once the last byte in the packet has been
read. Updated FATE reference.

This is already done by avcodec_decode_audio3()

The low 32 bits of a multiplication are the same for signed
and unsigned operands.  Casting to unsigned before multiplying
is thus equivalent while avoiding signed overflow, which is
undefined by the C99 standard.

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

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Fix the fate ref for prores-422_proxy by reverting the changes to it
in commit f492df0927

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

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

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

The shorten decoder does not support seeking.

increment the 'buf' pointer instead, and consume the whole packet.

This is already checked in avcodec_decode_audio3()

channel count

Making 'samples' a pointer to uint8_t simplifies the DECODE
macro and reduces the amount of type casting overall.

This also fixes some signed overflows on left shift.

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

This function intentionally overflows the signed range on
the left shift.  Using this type-punning avoids errors from
the overflow checker without disabling this test globally.

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

Both v->fcm and v->field_mode are used in common code, now they won't be
reset for progressive frame after interlaced one causing writing past the
frame end for example.

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

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Signed-off-by: Diego Biurrun <diego@biurrun.de>

This will allow the caller to enumerate child contexts in a generic way
and since the API is recursive, it also allows for deeper nesting (e.g.
AVFormatContext->AVIOContext->URLContext)

This will also allow the new setting/reading API to transparently apply
to children contexts.

Unsupported bit depth is certainly an error the user will
want to know about.

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

This code relies on the result wrapping as for unsigned
values, and the sign is not used.  Thus an unsigned type
is proper here.

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

The values were reversed.

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

The bit_rate_value_minus1 and cpb_size_value_minus1 elements
allow a wider range than get_ue_golomb() supports.  This
adds a get_ue_golomb_long() function supporting up to 31
leading zeros, which is the maximum for these syntax
elements, and uses it in decode_hrd_parameters().

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

60% speedup (overall decoding time) at 2 threads, and another 60%
speedup at 4 threads.

~3.0-3.5x as fast as original C version, 1.6x as fast overall.