Use the flags argument of av_hwframe_ctx_create_derived() to pass the
mapping flags which will be used on allocation.  Also, set the format
and hardware context on the allocated frame automatically - the user
should not be required to do this themselves.

This only supports one device globally, but more can be used by
passing them with input streams in hw_frames_ctx or by deriving new
devices inside a filter graph with hwmap.

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

Only I-frames are decoded for now.

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

doc/examples/output.c:512:33: warning: passing argument 2 of ‘sws_scale’ from incompatible pointer type

doc/examples/filter_audio.c:168:17: warning: assignment discards ‘const’ qualifier from pointer target type

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

Added parameter descriptions for all functions
 and converted in-function comments into regular
 (non-Doxygen) comments.

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

Takes a raw input stream containing frames with correct timestamps but
possibly out of order and inserts additional show-existing-frame
packets to correct the ordering.

From ffmpeg commit 2e6636aa87.

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.

Adds functions to convert to/from strings and a function to iterate
over all supported device types.  Also adds a new invalid type
AV_HWDEVICE_TYPE_NONE, which acts as a sentinel value.

Creates a new device context from another of a different type which
refers to the same underlying hardware.

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>

NASM is more actively maintained and permits generating dependency information
as a sideeffect of assembling, thus cutting build times in half.

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

For use by codec implementations which can allocate frames internally.

This is an extended version of the AVFrame.opaque field, which can be
used to attach arbitrary user information to an AVFrame.

The usefulness of the opaque field is rather limited, because it can
store only up to 32 bits of information (or 64 bit on 64 bit systems).
It's not possible to set this field to a memory allocation, because
there is no way to deallocate it correctly.

The opaque_ref field circumvents this by letting the user set an
AVBuffer, which makes the user data refcounted.

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

This will avoid every caller from hardcoding some specific alignment,
which may break in the future with new instruction sets.

Before this commit, AVIOContext is to be freed with a plain av_free(),
which prevents us from adding any deeper structure to it.

No deprecation guards, because the old decode API (for which this field
is needed) doesn't have any either.

This field should be removed together with the old decode calls.

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

In this mode it tells the muxer about the bitrate of the input stream.

Signed-off-by: Peter Große <pegro@friiks.de>
Signed-off-by: Martin Storsjö <martin@martin.st>

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

Extend the width/height doxy to clarify that it should store coded
values.

size_t is the correct type to use for sizes.

This can be useful to filter out noise in known-broken scenarios like
miscompilation by legacy compilers and similar.

Originally based on a patch by Diego Biurrun.

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

Partially based on code by Ronald S. Bultje <rsbultje@gmail.com>.

It is useful for testing/debugging and will also be used as the default
filter in the following commit adding pre-decode filtering to avoid
having a separate non-filtered codepath.

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

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

While no decoder currently exports spherical information, this type
represents a frame property that has to be passed through from container
to frames.

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

Supporting the system was a nice joke for the 9 release, but it has
run its course. Nowadays Plan 9 receives no testing and has no
practical usefulness.

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

Functionally similar to av_packet_add_side_data(). Allows the use of an
already allocated buffer as stream side data.

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

If makeopts_fate is set, these makeopts are used for running the
tests instead of the normal makeopts. If it isn't set, the normal
makeopts variable is used as before.

This is useful if remote testing on a lesser machine where a large
number of parallel jobs might be undesireable, while wanting to speed
up the build with many parallel processes.

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

AVPackets on stack are discouraged.