If no threading is requested do not issue warning about unsupported
threading algorithm.

Specifically, qmin/qmax, gop_size and keyint_min.

Fixes bug 47.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

Make libvpx support close to the libx264 one. Thanks to
Jan Gerber <j@v2v.cc> for the support.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

Uses 'buf' directly instead of a separate iterator variable 'in'.

Uses the native sample format for the codec instead of left-shifting all
samples by 8.

Make the code easier to read.

This fixes bind(8080): Address family not supported by protocol.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

On OS X, av_malloc(0) returns pointers that cause crashes when
freed.
Signed-off-by: NMartin Storsjö <martin@martin.st>

Copy the Inter 8x8 scaling list as second 8x8 matrix into DXVA2's
quantization matrix data structure instead of a potentially unset
Intra chroma scaling matrix.

Fix dxva2 decoding for some H264 samples.
Signed-off-by: NJanne Grunau <janne-libav@jannau.net>

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

There is no valid reason the user should ever send such packets in the
first place, but the documentation for CODEC_CAP_DELAY states that the
codec is guaranteed not to get a NULL packet unless that capability is
set. That isn't true without preventing this case.

The workaround needs to be enabled per PCI ID which cannot be detected inside
libavcodec. So add a flag to manually enable the alternate behavior.
Signed-off-by: NJanne Grunau <janne-libav@jannau.net>

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

Also use the post-header data size to control termination of the main
decoding loop.

Also use the post-header data size to control termination of the main
decoding loop.

Also properly clip the right channel step_index.

Speeds up the ADPCM IMA WAV decoder by 15-20% overall.