Meant to reset the internal bsf state without the need to reinitialize it.

Signed-off-by: James Almer <jamrial@gmail.com>

AVCodecContext.extra_hw_frames is added to the size of hardware frame
pools created by libavcodec for APIs which require fixed-size pools.
This allows the user to keep references to a greater number of frames
after decode, which may be necessary for some use-cases.

It is also added to the initial_pool_size value returned by
avcodec_get_hw_frames_parameters() if a fixed-size pool is required.

This adds a new API, which allows the API user to query the required
AVHWFramesContext parameters. This also reduces code duplication across
the hwaccels by introducing ff_decode_get_hw_frames_ctx(), which uses
the new API function. It takes care of initializing the hw_frames_ctx
if needed, and does additional error handling and API usage checking.

Support for VDA and Cuvid missing.

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

This also adds support to avconv (which is trivial due to the new
hwaccel API being generic enough).

The new decoder setup code in dxva2.c is significantly based on work by
Steve Lhomme <robux4@gmail.com>, but with heavy changes/rewrites.

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

Only I-frames are decoded for now.

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

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Deprecated in 07/2015.

Deprecated in 10/2014 and 07/2015.

Deprecated in 10/2015.

Deprecated in 08/2014.

Deprecated in 08/2014.

Deprecated in 04/2014.

Deprecated between 04/2014 - 05/2015.

Deprecated in 07/2014.

Deprecated in 01/2014.

Deprecated in 10/2013.

Deprecated in 10/2013.

qscale types and maximum number of bframes deprecated in 10/2013.
Negative linesizes deprecated in 11/2013.
xvidmmx deprecated in 08/2014.

Deprecated in 10/2013.

Deprecated in 11/2013.

Alpha deprecated in 11/2013.
Sh4 and sparc deprecated in 01/2014.

Deprecated in 10/2013.

Illegal ac_vlc and old msmpeg4 detection deprecated in 10/2013.

Deprecated in 10/2013.

Deprecated in 10/2013.

Deprecated in 08/2013.

Deprecated in 07/2013.

Deprecated in 07/2013.

Deprecated in 04/2013.

Deprecated in 01/2013.

Deprecated in 11/2012.

This disables everything that was deprecated at least 18 months ago.

Readjust the minimum API version as needed, postponing any
API-incompatible changes until the next bump.

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

This supports retrieving the device from a provided hw_frames_ctx, and
automatically creating a hw_frames_ctx if hw_device_ctx is set.

The old API is not deprecated yet. The user can still use
av_vdpau_bind_context() (with or without setting hw_frames_ctx), or use
the API before that by allocating and setting hwaccel_context manually.

This "reuses" the flags introduced for the av_vdpau_bind_context() API
function, and makes them available to all hwaccels. This does not affect
the current vdpau API, as av_vdpau_bind_context() should obviously
override the AVCodecContext.hwaccel_flags flags for the sake of
compatibility.

Decodes YUV 4:2:2 10-bit and RGB 12-bit files.
Older files with more subbands, skips, Bayer, alpha not supported.

Further fixes and refactorings by Anton Khirnov <anton@khirnov.net>,
Diego Biurrun <diego@biurrun.de>, Vittorio Giovara <vittorio.giovara@gmail.com>

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

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

For use by codec implementations which can allocate frames internally.

Also, add generic code for handling cropping, so the decoders can export
just the cropping size and not bother with the rest.

Introducing enforced sync points in arbitrary places is bad for
performance. Since the vast majority of receiving code (QSV VPP or
encoders, retrieving frames through hwcontext) will do the syncing, this
change should not be visible to most callers. But bumping micro just in
case.

This is also consistent with what VAAPI hwaccel does.

We can pick the correct slice index directly from the ID3D11VideoDecoderOutputView
casted from data[3].

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

Partially based on a patch by Timo Rothenpieler <timo@rothenpieler.org>.
Additional scaling list handling fix by Jun Zhao <mypopydev@gmail.com>.

Certain hardware decoding APIs are not guaranteed to be thread-safe, so
having the user access decoded hardware surfaces while the decoder is
running in another thread can cause failures (this is mainly known to
happen with DXVA2).

For such hwaccels, only allow the decoding thread to run while the user
is inside a lavc decode call (avcodec_send_packet/receive_frame).

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