It is used to store the channel mask for non-standard layouts.

The channel layout mask for non-standard layouts is typically stored at
the container level (as a vorbiscomment tag) for FLAC.

Before, header information for ogg format files was sent with the
first encoded packet.

This patch makes it so that it is possible for API users to
differentiate between headers and encoded audio. This is useful, for
example, when creating an audio stream where you want to send one set
of headers for every client that connects and then the encoded stream
of audio.
Signed-off-by: NMartin Storsjö <martin@martin.st>

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

Also shorten HuffYUV context member names to avoid clutter.

Also shorten HuffYUV context member names to avoid clutter.

Thatt hardcodes the number of formats into lavfi and will break when a
shared lavu is updated, adding new formats.

That hardcodes the number of pixel formats into lavfi and will break
when a shared lavu is updated, adding new pixel formats.

That hardcodes the number of pixel formats into lavfi and will break
when a shared lavu is updated, adding new pixel formats.

Avoid using AV_PIX_FMT_NB, since that hardcodes the number of pixel
formats into lavfi and will break when a shared lavu is updated, adding
new pixel formats.

Avoid using AV_PIX_FMT_NB, since that hardcodes the number of pixel
formats into lavfi and will break when a shared lavu is updated, adding
new pixel formats.

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

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

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

Signed-off-by: NKostya Shishkov <kostya.shishkov@gmail.com>

Also include zero in the table, eliminating a special case in the
decoder.
Signed-off-by: NNiels Möller <nisse@southpole.se>
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

Removes an ugly $(if) to avoid conflicts with $(FFLIBS-) in the
top-level MAkefile.

This fixes compilation with MSVC.
Signed-off-by: NMartin Storsjö <martin@martin.st>

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

Add AV_PKT_DATA_DISPLAYMATRIX and AV_FRAME_DATA_DISPLAYMATRIX as stream and
frame side data (respectively) to describe a display transformation matrix
for linear transformation operations on the decoded video.

Add functions to easily extract a rotation angle from a matrix and
conversely to setup a matrix for a given rotation angle.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

This also handles side data properly.

Side data count is incremented by by calling av_packet_new_side_data()
in the following loop, setting it explicitly results in the resulting
value being twice what it should be.

CC: libav-stable@libav.org

All encoders should output proper timestamps now.

Use OutputStream.last_mux_dts as an approximation of 'current' output
time instead.

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

Process 4 pixels at once.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

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

This mirrors the demuxer behaviour and avoids accessing
AVCodecContext.codec, which should not be done in muxers.

Also, return a proper error code.

It is not supposed to be set from outside of libavcodec.
Set average framerate instead.