id3v2: read all textual chapter subframes

Signed-off-by: Paul B Mahol <onemda@gmail.com>
alacenc: don't allocate unused avctx->coded_frame

Signed-off-by: Paul B Mahol <onemda@gmail.com>
pcmenc: don't allocate unused avctx->coded_frame

Signed-off-by: Paul B Mahol <onemda@gmail.com>
sonicenc: don't allocate unused avctx->coded_frame

Signed-off-by: Paul B Mahol <onemda@gmail.com>
tta: replace datalen with nb_samples

This is less confusing.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
tta: unbreak demuxing of files with id3 tags at start of file

Signed-off-by: Paul B Mahol <onemda@gmail.com>
smvjpegdec: only extract picture when a picture has been decoded.

Fixes null pointer dereference

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>