The most interesting parts are initialization in ff_MPV_common_init() and
uninitialization in ff_MPV_common_end().

ff_mpeg_unref_picture and ff_thread_release_buffer have additional NULL
checks for Picture.f, because these functions can be called on
uninitialized or partially initialized Pictures.

NULL pointer checks are added to ff_thread_release_buffer() stub function.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

It is only used in one place immediately after it is set.

That field is never set for encoding.

These were erroneously removed in 8769113a.

It does not help as an abstraction and adds dsputil dependencies.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This allows using it from libavformat as well. This will be used
by the RTP/JPEG depacketizer.
Signed-off-by: Martin Storsjö <martin@martin.st>

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

Also break some long lines, remove codec function placeholder comments
and add spaces in sample/pixel format lists.
Signed-off-by: Martin Storsjö <martin@martin.st>

Deprecate CODEC_FLAG_CBP_RD.

Deprecate CODEC_FLAG2_SKIP_RD in favor of the corresponding mpv_flags
flag.

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

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

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

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

It's not used anywhere else.

They are used in lavf.

Deprecate CODEC_FLAG_ALT_SCAN

Deprecate CODEC_FLAG_PART

It's more readable and less prone to breakage.

FF_COMMON_FRAME holds the contents of the AVFrame structure and is also copied
to struct Picture.  Replace by an embedded AVFrame structure in struct Picture.

As a nice sideeffect this fixes the following warning:
libavcodec/mpeg4videoenc.c:302:20: warning: variable ‘rl’ set but not used [-Wunused-but-set-variable]

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

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

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

None of these symbols should be accessed directly, so declare them as
hidden.
Signed-off-by: Mans Rullgard <mans@mansr.com>