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70 Commits

Author SHA1 Message Date
Chris Robinson
6d416ee734 Add the reverb room rolloff to the source room rolloff, not override 2008-07-15 02:23:53 -07:00
Chris Robinson
f369be148f Reduce the mix buffer sizes by half 
Nearly 3MB is a bit much. Could reduce it further, but this is good enough for now.
 2008-07-08 19:37:14 -07:00
Chris Robinson
3a09e446b3 Leave SourceToListener untransformed for use with untransformed velocities 
Distance is also left untransformed so cone calculations with SoundToListener
are correct
 2008-07-03 03:13:43 -07:00
Chris Robinson
fed346c285 Fix source calculations for AL_SOURCE_RELATIVE mode 
Make sure the source position and direction are properly put into listener-
space before working with them, and don't calculate the listener velocity for
relative coordinates
 2008-05-18 16:52:38 -07:00
Chris Robinson
49d9695ad9 Check the right struct member for the filter type 2008-04-12 07:25:18 -07:00
Chris Robinson
ec7f20644d Fast float-to-int function is no longer needed 2008-02-08 21:03:48 -08:00
Chris Robinson
3d5fa91703 Remove unnecessary casting 2008-02-08 21:01:05 -08:00
Chris Robinson
b4ffdfab81 Add an option for duplicating stereo sources on the back speakers 2008-02-06 22:18:50 -08:00
Chris Robinson
e8b576bc25 Use the correct channel ordering for Windows 2008-01-27 07:04:13 -08:00
Chris Robinson
01404ed7af Fix output channel order for 6.1 and 7.1 2008-01-27 06:49:48 -08:00
Chris Robinson
781e4e5be4 Remove an unneceesary pointer check and decrease indentation 2008-01-21 14:54:15 -08:00
Chris Robinson
f3dddb5e99 Remove unnecessary duplicate thunk lookups 2008-01-21 14:33:42 -08:00
Chris Robinson
9a5e892cad Small formatting updates 2008-01-20 22:16:28 -08:00
Chris Robinson
0317362662 Remove duplicate function 2008-01-20 19:22:39 -08:00
Chris Robinson
6b403a76e8 Don't access ALSource for every sample mix 2008-01-20 19:20:24 -08:00
Chris Robinson
1a3e39e452 Remove some unnecessary duplicate math, which was making long lines 2008-01-19 00:49:05 -08:00
Chris Robinson
7dc73815ae Remove some branches 2008-01-18 21:39:09 -08:00
Chris Robinson
4caf2c7edd Implement AL_EFFECT_REVERB 
Here is a quick description of how the reverb effect works:

 +--->---+*(4)
 |       V       new sample
 +-----+---+---+    |
 |extra|ltr|ref| <- +*(1)
 +-----+---+---+
   (3,5)*|   |*(2)
         +-->|
             V
         out sample

 1) Apply master reverb gain to incoming sample and place it at the head of the
    buffer. The master reverb gainhf was already applied when the source was
    initially mixed.
 2) Copy the delayed reflection sample to an output sample and apply the
    reflection gain.
 3) Apply the late reverb gain to the late reverb sample
 4) Copy the end of the buffer, applying a decay gain and the decay hf ratio,
    and add to the late reverb.
 5) Copy the late reverb sample, adding to the output sample.

 Then the head and sampling points are shifted forward, and done again for each
 new sample. The extra buffer length is determined by the Reverb Density
 property. A value of 0 gives a length of 0.1 seconds (long, with fairly
 distinct echos) , and 1 gives 0.075 seconds (short, indistinct echos).
 The decay gain is calculated such that after a number of loops to satisfy the
 Decay Time, a sample will be 1/32768th as powerful (virtually insignificant to
 the resulting output, and only getting further reduced). It is calculated as:

 DecayGain = pow(1.0f/32768.0f, 1.0/(DecayTime/ExtraLength));

 Things to note: Reverb Diffusion is not currently handled, nor is Decay HF
 Limit. Decay HF Ratios above 1 probably give incorrect results. Also, this
 method likely sucks, but it's the best I can come up with before release. :)
 2008-01-18 21:25:40 -08:00
Chris Robinson
43cfc097de Don't dereference ALContext if there's no context yet 
Patch by Evgeny A. Marchenko
 2008-01-17 12:57:22 -08:00
Chris Robinson
be34dbe608 Don't include alAuxEffectSlot.h in alSource.h 2008-01-16 14:01:24 -08:00
Chris Robinson
4742dedb45 Don't clamp wet gain if there's no send slot, and move slot gain calculation 
To remove an extra if check
 2008-01-16 13:00:35 -08:00
Chris Robinson
10a9bc62bf Store a reference to the effect slot in a source's send, not a copy 2008-01-16 12:43:25 -08:00
Chris Robinson
24f433b938 Remove unneeded variables 2008-01-15 21:57:50 -08:00
Chris Robinson
abc69dd3d0 Use acosf when available 2008-01-15 21:23:14 -08:00
Chris Robinson
03ca50fa70 Use the previous low-pass filter again, as it seems to match the intended output better 2008-01-15 18:29:21 -08:00
Chris Robinson
df07e8a65b Add support for AL_LOKI_quadriphonic 2008-01-14 16:11:15 -08:00
Chris Robinson
38db8eb64b Reorder setting of some variables 2008-01-12 07:36:22 -08:00
Chris Robinson
3bbbf8a025 Merge branch 'master' into efx-experiment 2008-01-11 17:19:08 -08:00
Chris Robinson
042ec206e7 Disable fast float-to-int hack. 
Even with precautions, it's giving problems. Not worth it since I don't quite
understand how it works, or know if there's even a benefit.
 2008-01-05 05:03:31 -08:00
Chris Robinson
312108a0d3 Try a different low-pass filter 
Seems to be more correct, although it's not as powerful as the previous (which
may be a good thing)
 2008-01-05 03:51:24 -08:00
Chris Robinson
5e48be27b8 Merge branch 'master' into efx-experiment 2008-01-04 14:40:38 -08:00
Chris Robinson
b3badbf97d Use 6 point spatialization for 6.1 and 7.1 output 2008-01-04 14:15:55 -08:00
Chris Robinson
8fe39042da Add the Bauer stereophonic-to-binaural DSP (bs2b) code and hooks 2008-01-03 05:36:51 -08:00
Chris Robinson
9ed574b399 Merge branch 'master' into efx-experiment 2008-01-01 06:29:11 -08:00
Chris Robinson
733cd120b3 Fix channel ordering for multichannel buffers 2008-01-01 06:16:19 -08:00
Chris Robinson
4e2f8e305e Fix wet volumes for multichannel path 2007-12-31 19:40:24 -08:00
Chris Robinson
3d78d93b40 Merge branch 'master' into efx-experiment 2007-12-31 19:34:52 -08:00
Chris Robinson
5a2f509104 Zero out wet send params when calculating source params 
Instead of using a check in the mix loop
 2007-12-31 19:13:18 -08:00
Chris Robinson
cb1d62f254 Add paths for 4 to 7.1 channel buffer mixing 2007-12-31 04:50:34 -08:00
Chris Robinson
1cbd625b4e Disable unnecessary calculations 2007-12-31 03:45:26 -08:00
Chris Robinson
73678f3b78 Allow psuedo 6.1 and 7.1 output 
This only does spatial calculations on the 4 corner speakers, but it's
necessary groundwork for AL_EXT_MCFORMATS support. Spatial calculations for 6
speakers can be added later.
 2007-12-31 03:29:14 -08:00
Chris Robinson
a43868c32b Use an enum list for dealing with channels 
This will make it easier to remap channels, especially the center and lfe channels
 2007-12-31 01:47:10 -08:00
Chris Robinson
7a99b1fa32 Make some defines local to ALu.c 2007-12-31 01:16:13 -08:00
Chris Robinson
e82c27ab04 Fix includes so alMain.h doesn't include so much by itself 2007-12-31 01:09:57 -08:00
Chris Robinson
f7ef5c169b Don't default to AL_FORMAT_STEREO16 when writing to the output buffer 2007-12-31 00:08:07 -08:00
Chris Robinson
927763902f Loop per frame, not per sample, when writing the output buffer 2007-12-31 00:05:29 -08:00
Chris Robinson
5f8e65e099 Implement AL_EXT_FLOAT32 2007-12-28 22:41:14 -08:00
Chris Robinson
8011ad97b5 Don't check explicitly against formats, but rather their byte/channel count 2007-12-26 23:29:32 -08:00
Chris Robinson
ab8d342df0 Allow 5.1 channel output 
This doesn't use the center or LFE channel in spatial calculations, however
 2007-12-26 23:01:22 -08:00
Chris Robinson
96bd020bd3 Use the right-channel sample... 2007-12-21 14:30:38 -08:00