Some old assemblers still in use do not support named tags.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This might not be needed at the moment, but it's good practice to
pass it to all chained AVFormatContexts, if it would happen to be
used there at a later point.
Signed-off-by: Martin Storsjö <martin@martin.st>

This function causes several versions of armcc to miscompile code,
and the performance impact is small.
Signed-off-by: Mans Rullgard <mans@mansr.com>

All our ARM asm preserves alignment so setting this attribute
in a common location is simpler.  This removes numerous warnings
when linking with armcc.
Signed-off-by: Mans Rullgard <mans@mansr.com>

LDR with register offset and PC as base register is not available in
the Thumb instruction set so the addition must be done separately.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Make it consistent with the other function-like macros.

It should be vfw32.lib with MSVC.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Split away option settings, sanity checks and general setup.

Mostly cosmetic changes adding some intermediate to shorten the lines.

This takes into account planar vs. packed when comparing to find the closest
sample format match.

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

If there is an error during frame parsing, but AVCodecContext.channels was
changed and AC3DecodeContext.out_channels was set previously, the two may not
match.

Fixes CVE-2012-2802
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

CC: libav-stable@libav.org

When decode_nal_units() previously encountered a NAL_END_SEQUENCE,
and there are some junk bytes left in the input buffer, but no start codes,
buf_index gets stuck 3 bytes before the end of the buffer.

This can trigger an infinite loop in the caller code, eg. in
try_decode_trame(), as avcodec_decode_video() then keeps returning zeroes,
with 3 bytes of the input packet still available.

With this change, the remaining bytes are skipped so the whole packet gets
consumed.

CC:libav-stable@libav.org
Signed-off-by: Jindřich Makovička <makovick@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

It is got_output, not data_size.

Avoids a forward declaration of decode_chunks().

The decode function assumes that the video will have those dimensions.

Fixes CVE-2012-2801

CC:libav-stable@libav.org

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Fixes CVE-2012-2799

CC:libav-stable@libav.org

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Anton Khirnov <anton@khirnov.net>