Reported by wtchang in trac: https://trac.xiph.org/ticket/2160

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

These rely on TF rather than short windows to avoid partial collapse.

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

Also clean up comments from the last patches

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

The transient detector would trigger on low-pitch vowels, but we didn't have
enough bits to properly code the high bands as a transient, resulting in
partial collapse and unstable energy.

Different distributions of doxygen have different default
values of HAVE_DOT setting, so we need to pick a specific
setting to avoid 'missing dot' warnings on some platforms.

Doxygen uses it to generate inclusion graphs for our various
header files, which is somewhat useful, but not essential.
We therefore enable dot if it's present (usually through
the parent graphviz package) but disable it if it's not
available, silencing the warning, but not giving uniform
results.

Without that, we could bust the budget and end up with the
if (ec_tell(&enc) <= 8*nb_compr_bytes)
being false, followed by an assert failure later.

Reported by Mark Warner.

memcpy() aliasing bug caught by Felicia's encoder fuzzing test

This should also avoid cases where stereo streams receive fewer
bits than mono streams.

Michael Graczyk authored 8 years ago and Jean-Marc Valin committed 8 years ago

Change-Id: I16bd4cd990d8ad5888c9e30016218ac25242ecb5

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

The encoder would reserve bytes for redundancy and then decide to use
CELT, but not use those bytes.

Also avoids stupidly high/low rates

Also clarify in doc that conformance issue relates to decoder only.

Ricardo Constantino (:RiCON) authored 8 years ago and Jean-Marc Valin committed 8 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

This makes it possible to use folding rather than LCG noise in the second CELT
band (9.6 to 12 kHz) in hybrid mode.

The multistream encoder input has st->layout.nb_channels channels.
The number of channels actually encoded is st->layout.nb_streams +
st->layout.nb_coupled_streams, which may be fewer, so ideally it
would only analyze those when computing the optimal frame size, but
there is no code to do that currently.