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108 commits

Author SHA1 Message Date
Jean-Marc Valin
cefc5ca26d Revert "compute_band_energies() merged with normalised_bands()" 
This reverts commit a1bc18a388.
I think it's easier for now to deal with two functions here, even though they
could be merged.
 2008-03-07 14:53:17 +11:00
Jean-Marc Valin
f93747c44a fixed-point: changed find_spectral_pitch() to use single-precision (16-bit) FFT. 
This involved adding kfft_single.[ch] that redefines kiss_fft a second time
with a different prefix. All this is still a bit of a mess now. The mask
had to be converted to 16-bit input, but we're still using floats to apply it.
 2008-03-05 17:20:30 +11:00
Jean-Marc Valin
d9de593104 Fixed a bunch of warnings 2008-03-05 08:11:57 +11:00
Jean-Marc Valin
a1bc18a388 compute_band_energies() merged with normalised_bands() 2008-03-04 22:52:52 +11:00
Jean-Marc Valin
069c3de65f Removed deprecated mode interface and added missing include 2008-03-04 20:38:00 +11:00
Jean-Marc Valin
0758689246 pre-emphasis coef now a constant 2008-03-03 17:19:17 +11:00
Jean-Marc Valin
ddb181b75e A bit more reordering in stack memory allocation -- saved 1024 bytes on peak use 2008-03-03 14:53:47 +11:00
Jean-Marc Valin
137ec8e9b8 applying the pitch windowing directly in find_spectral_pitch() 2008-03-03 14:44:42 +11:00
Jean-Marc Valin
05080b4b9b No longer storing the zero parts of the in[] array in the encoder 2008-03-03 14:23:51 +11:00
Jean-Marc Valin
632f218b4b Pitch predictor now uses a larger range of offset by not being limited to the 
window size when parts of the window are zero.
 2008-03-03 14:08:21 +11:00
Jean-Marc Valin
0141723d30 compute_mdcts() no longer reads the part of the input that should be zeros 
anyway (check-point for pitch improvements to follow)
 2008-03-03 13:59:55 +11:00
Jean-Marc Valin
3e08a88389 Only the (rising) overlap part of the window is stored now. No need to hold the 
zeros and ones (nor even the second half).
 2008-03-03 13:49:20 +11:00
Jean-Marc Valin
f28062fe6a Don't bother multiplying when the window's value is one or zero 2008-03-03 13:42:23 +11:00
Jean-Marc Valin
a556694e12 Stereo pitch search no longer requires twice the memory/complexity. 2008-03-01 20:14:20 +11:00
Jean-Marc Valin
d748cd5570 Another C90-fying pass. Fixed some warnings in the process. 2008-03-01 07:27:03 +11:00
Jean-Marc Valin
81b38c2295 Moved mdct state and window to the mode so it can be shared between multiple 
encoders and decoders.
 2008-02-29 21:08:49 +11:00
Jean-Marc Valin
8d4ac155e6 Saved on stack usage by changing the order of the allocation 2008-02-29 17:24:02 +11:00
Jean-Marc Valin
8600f69f79 Initial support for a managed stack/scratchpad. Still needs some work. 2008-02-29 15:14:12 +11:00
Jean-Marc Valin
5e171490a9 Removed some unused parameters and fixed a couple -W warnings 2008-02-28 00:07:23 +11:00
Jean-Marc Valin
3f382caeb4 Fixing pi again before another massive public outcry 2008-02-27 14:07:45 +11:00
Jean-Marc Valin
e40a19cbe9 fixed-point: no float vars left (and nearly no float ops left) in celt.c 2008-02-27 12:09:50 +11:00
Jean-Marc Valin
5d56183404 fixed-point: log-energy for previous frame now a 16-bit value. This currently 
intruduces a bit of an encoder-decoder mismatch (Q8 in dB), but it'll be
reduced when the interals of quant_energy_mono() are properly converted to
fixed-point and oldEBands gets rounded instead of truncated.
 2008-02-27 11:59:05 +11:00
Jean-Marc Valin
1d6ad108fb fixed-point: converted window to 16-bit value 2008-02-27 11:25:25 +11:00
Jean-Marc Valin
42074389bd fixed-point: pre/de-emphasis converted. 2008-02-27 11:08:53 +11:00
Jean-Marc Valin
8835a4df25 Removed useless masking curve for current frame and ignored Fs argument to 
masking computation functions.
 2008-02-26 16:35:19 +11:00
Jean-Marc Valin
017d4455da pitch gain is now celt_pgain_t 2008-02-26 16:19:03 +11:00
Jean-Marc Valin
e901fe35b8 fixed-point: added a celt_ener_t type for band energy. 2008-02-26 14:46:26 +11:00
Jean-Marc Valin
5c032a4cb4 fixed-point: celt_sig_t now a 32-bit value. 2008-02-25 14:55:09 +11:00
Jean-Marc Valin
49ca99efa5 fixed-point: initial support for using the fixed-point MDCT (rest is still all 
float)
 2008-02-25 14:12:10 +11:00
Jean-Marc Valin
2c1d2f5bcc MDCT now scales down by N/2 instead of N/4. The factor two is moved to the 
overlap-add during synthesis.
 2008-02-22 21:54:11 +11:00
Jean-Marc Valin
18ddc02afd Separating types for normalised vs. denormalised data paths 2008-02-22 14:24:50 +11:00
Jean-Marc Valin
44ffd5a8da Making sure freed or corrupted modes can't be used (produce a run-time warning). 2008-02-22 00:39:25 +11:00
Jean-Marc Valin
d501f6143c Doing intra-frame prediction backwards (and a few comments) 2008-02-21 12:16:57 +11:00
Jean-Marc Valin
e6b7465087 Some sampling rate cleanup (now in the mode) 2008-02-20 18:01:08 +11:00
Jean-Marc Valin
276de7211d Mode doc 2008-02-20 17:45:51 +11:00
Jean-Marc Valin
8c19b030df Changed _new() to _create() in the API. Added some documentation 
on how to use the API.
 2008-02-20 15:53:15 +11:00
Jean-Marc Valin
0bb05bc5ea Another bunch of C99 array conversions (few more to go) 2008-02-20 13:43:40 +11:00
Jean-Marc Valin
02fa913c32 More C89 fixes, making sure to include config.h from all source files. 2008-02-20 12:09:29 +11:00
Jean-Marc Valin
a85657bd29 removed // comments and added stack_alloc.h (not used everywhere yet) 
to make the code more C89-friendly.
 2008-02-20 11:59:30 +11:00
Jean-Marc Valin
25358cd407 Merged the rate allocation atruct directly into the mode struct. 2008-02-19 12:21:32 +11:00
Jean-Marc Valin
ccea9ce917 Two-pass algorithm for filling the remaining bits. Still not perfect, but close 
enough.
 2008-02-18 22:03:18 +11:00
Jean-Marc Valin
c9cc6d3e34 Introducing a (very) crude budget for the energy encoder. 2008-02-13 11:37:41 +11:00
Jean-Marc Valin
cc4d3dda74 Fixed stereo regression introduced in 05686a5d6e 
also another stereo bug fixed for static-array ncwrs64().
 2008-02-13 00:08:29 +11:00
Jean-Marc Valin
636f5c86ab bit of cleaning up 2008-02-12 17:40:27 +11:00
Jean-Marc Valin
05686a5d6e As extra safety, make sure not to use pitch prediction when it would make 
the "effective gain" too high (>10 dB).
 2008-02-11 17:54:28 +11:00
Jean-Marc Valin
7e8a487ed2 No longer encoding the pitch index if the gain is zero anyway. 2008-02-11 16:55:34 +11:00
Jean-Marc Valin
cb7a2a3d52 Re-ordered the parameters in the stream: [energy, pitch index, pitch gains] 
Also fixed a bug that was exposed by the change (and removed some warnings)
 2008-02-11 16:44:48 +11:00
Jean-Marc Valin
6c1f604944 Oops. Fixed spreading function for stereo 2008-02-11 16:17:42 +11:00
Jean-Marc Valin
8f0f4b9421 Limiting intra-frame prediction codebook to 32 entries (plus sign) 2008-02-11 13:52:44 +11:00
Jean-Marc Valin
5b50f4bf81 Decays corresponding to the psychoacoustic spreading function are now 
pre-computed (instead of computing tons of pow() uselessly all the time)
 2008-02-11 11:50:20 +11:00