This is the less-surprising behavior and will hopefully
result in fewer corner case bugs (e.g. losing gain
after seeking). This commit also updates the documentation.

This CTL was requested by Nicolas George for FFmpeg.

This reverts commit 9f407afa.

Gregory Maxwell authored 12 years ago and Jean-Marc Valin committed 12 years ago

This will help prevent people using non-standard build environments from
footgunning themselves and becoming a support burden.

Also added 3rd clause to "master" COPYING file

See http://www.ietf.org/mail-archive/web/codec/current/msg02833.html
Still more changes to come

Thanks to Vincent Penquerc'h

Gregory Maxwell authored 13 years ago and Jean-Marc Valin committed 13 years ago

Also change the packet length in the API from int to opus_int32
because repacketized frames are able to go beyond 32767 bytes
in size.

- Draft updates
- Updated code to produce and check test vectors
- Making sure that the test vectors pass at all rates as well as for mono and stereo

- Safer gain clamping for PLC
- Makes opus_decoder_get_nb_samples() report an error on invalid ToC
- Giving a free license to the text ofthe draft (not just the code)

- When it cannot produce the rate it's being asked, the encoder now
  returns a "PLC packet"
- Makes it possible to use the CELT PLC for more than 20 ms

Also reformat some, but by no means all, of the opus
code for line length and three-character indents.

This is achieved by running the encoding process in a loop and
padding when we don't reach the exact rate. It also implements
VBR-with-cap, which means we no longer need to artificially decrease
the SILK bandwidth when it's close to the cap.

- There was a bug where the decoder resampler was not properly initialized
when fs_kHz == API_fs_kHz. In that case the resampler would continue to
upsample, and the output was corrupt.

- The delay value in the decoder was taken from the state before it was
potentially updated. This caused the decoder to apply the new dalay value one
frame late

- The encoder and decoder states are now updated more consistently, when
the sampling rate changes (pesq liked these changes)

- Properly resetting the side channel encoder and decoder for the first
frame with side coding active again

- Faster updating the "ratio" value in the LR_to_MS() code for large
prediction values means that for certain extreme/artificial input
signals the output looks better

Koen Vos authored 13 years ago and Jean-Marc Valin committed 13 years ago

- compile warning in opus_decoder.c
- decoder state reduced by ~3 kB (by merging buffers, as Tim suggested)
- some minor decoder optimizations (only the PLC is non-bit exact, so should be ok)

No longer encoding the redundancy flag for SILK since we can infer
redundancy from the length of the frame. Also, we skip encoding the
flag for hybrid mode when we know the decoder will not read it.

We now reset the CELT state when swithing to hybrid and we "drain"
the CELT MDCT overlap when switching away from hybrid.

The redundancy_bytes<0 test always fails because of the ec_tell(&dec)+29 test above.

Fix bug in the OPUS_GET_APPLICATION_REQUEST ctl and also add a bunch of set ctl range checking and improve encoder/decoder error code consistency.

This is now part of the bit-stream