This avoids potential alignment issues with allocating a char
array on the stack.

Let's put it back in if/when we have a clearer view of voice/music detection

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

Renames test_opus to opus_demo and adds the test_opus_api, test_opus_encode, test_opus_decode test programs.

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

Also some comment/warning fixes

Only encoder changes were necessary because this uses the same
"redundant frames" mechanism as SILK<->CELT switching.
This also fixes a regression introduced in 78291b27 that was
causing the encoder to go back and forth between bandwidths when
SILK wasn't ready to change.

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.

Only one of the two required checks in the encoder were updated. Thanks to
Tim for tracking down the actual cause of the mismatch.

These were caused by not prefilling the hybrid CELT state

- 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)

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

- fixes the test_opus "skip" for stereo
- fixes 6 visual studio compile warnings
- adds several header files to visual studio's include folder

Making sure not to abruptly "de-collapse" the stereo for such transitions

When SILK decided not to use the desired bandwidth, the redundancy
could be encoded at the desired bandwidth rather than at the actual
bandwidth used.

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.