sqrt(-1) returns "some NaN", it's not specified which exactly.

This fixes some nonsensical code by moving some should-be-shared
code to separate functions and using these.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This reverts commit 2cf8355f.
AVInputStream.nb_streams tracks number of streams found at the
beginning, new streams may appear that ffmpeg doesn't know about. Fixes
crash in this case.

Fixes build on next major bump.

They are still being used and shouldn't be removed.

Fixes compile with next lavc major.

This fixes build failures with -DDEBUG in CPPFLAGS.

This fixes build failures with -DDEBUG in CPPFLAGS.

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

0 is top-field-first, 1 is bottom-field-first, not the other way
around.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

Signed-off-by: David Goldwich <david.goldwich@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

This extends the ID3v2 parser to allow for reading of non-text (i.e.
other than T***) meta tag frames providing a ff_id3v2_read_all()
function. An additional data structure 'ID3v2ExtraMeta' is introduced
for these tags since AVDictionary is string oriented and unsuitable
for binary data.

A parser for tag frames of type GEOB is implemented, which is needed
to extract keyring information from encrypted OMA files. GEOB data
is parsed into 'ID3v2ExtraMetaGEOB' data structures.

The routine to decode characters from different encodings to UTF-8,
formerly part of the read_ttag() function, is moved to its own
function. Because some tag frames contain subparts of unknown length,
the function is now also able to read until a null character is found.
In addition, the function now takes care of allocating a buffer long
enough to hold the decoded characters.
Signed-off-by: David Goldwich <david.goldwich@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

This patch adds the possibility to calculate the DES-CBC-MAC of a
source buffer (i.e. the last block of the buffer encrypted in CBC
mode) without having to allocate a destination buffer that is as
long as the complete source buffer, but instead only 8 bytes
for the MAC.
Signed-off-by: David Goldwich <david.goldwich@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

If not enough bytes are available, keep track of them and skip
them on next call.

In practice, if these trailer bytes are written in a separate
call, there is no other data written in this call, making it
fall into the "FLV packet too small" case currently - working,
but not as intended.

This patch makes the code more robust, handling all cases
except for having the FLV packet header split over multiple
write calls.
Signed-off-by: Martin Storsjö <martin@martin.st>

If the FLV packet is larger than the AVIO buffer, a partial
FLV packet will be flushed to the RTMP protocol.

This commit handles the most common cases of FLV packets
being written in more than one call.
Signed-off-by: Martin Storsjö <martin@martin.st>

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

st may be NULL when there are more mov streams than AVStreams, e.g. when
chapters are present.

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

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

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

rv34_decode_slice() can return without allocating any pictures.
Signed-off-by: Martin Storsjö <martin@martin.st>

This prevents crashes with some corrupted bitstreams.
Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Joakim Plate <elupus@ecce.se>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

-1 is more correct than 0, as the position in the file is undefined.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Also remove outdated reference to color in vf_pad.c.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

It prevents crashes due to non initialized fields.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: David Goldwich <david.goldwich@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

Between ogg_save() and ogg_restore() calls, the number of streams
could have been reduced.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>