Makes it possible to do a "dry run" generation for in-place padding

Michael Klingbeil authored 1 year ago and Jean-Marc Valin committed 1 year ago

Add unit tests for opus_packet_extensions_count, opus_packet_extensions_parse,
and opus_packet_extensions_generate. Add various assertions for NULL buffers or
negative length arguments. Add explicit check for invalid length in
opus_packet_extensions_count. Check for extension id >127 in
opus_packet_extensions_generate. Check for invalid length input in
opus_packet_extensions_generate.

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

Makes shallow copy of decoder possible again

Avoids conflict with LPCNet, so that LPCNet headers can be included in
Opus

progressive decode, avoid storing DRED decoder state

Now generating the extension in place once all the data is already
in the right place.

Adding a 'D' byte to signal the DRED experiment, along with a version
number byte. This entire commit will be reverted once DRED is finalized
and given a non-experimental extension number.

Fixes "FEC buffer full" issue

Properly re-initialize DRED (only) when needed

Probably still has many bugs

Now only running the decoder on "received" packets

Unlike OPUS_SET_INBAND_FEC(1), the encoder does not necessarily
switch to SILK if we have music.

Even if the redundancy is ignored, the final range from the decoder is
needed for testing.

Reviewed by Timothy B. Terriberry.