Chris Robinson
8a857c35ee
Calculate filter coefficients in aluMixData
2009-03-13 22:58:54 -07:00
Chris Robinson
8348d719cd
Clamp gain of multichannel sources
2009-02-10 15:15:49 -08:00
Chris Robinson
57c2e9b5f8
Include assert.h for assert()
2009-02-02 11:18:33 -08:00
Chris Robinson
7d7fc39035
Use calculated distance from reference for air absorption
2009-01-30 10:56:25 -08:00
Chris Robinson
351105b3df
Fix incorrect comment
2009-01-30 10:53:09 -08:00
Chris Robinson
cbfc33215b
Use M_PI since it is sure to be defined
2009-01-27 07:11:58 -08:00
Chris Robinson
1f4c69c17a
Use a matrix for up- and down-mixing channels
2009-01-25 22:11:07 -08:00
Chris Robinson
f5b19fad20
Duplicate stereo onto the side channels as well as the back
2009-01-25 19:54:50 -08:00
Chris Robinson
bc60818e9a
Don't read stereo layout when output is mono
2009-01-25 19:33:52 -08:00
Chris Robinson
f82c88f016
Add options for user-configurable speaker arrangements
2009-01-25 19:20:47 -08:00
Chris Robinson
98e86decad
6.1 uses front- and back-center, not left- and right-back channels
2009-01-24 15:13:14 -08:00
Chris Robinson
aaf2c0ebd4
Seperate mixing loops depending on source channel configuration
2009-01-24 13:57:01 -08:00
Chris Robinson
778b74cae1
Reimplement panning using lookup tables, based on a patch by Christian Borss
...
This allows speaker positions to be specified by discrete angles around the
listener, providing more flexibility and configurability in placement.
Additional patches to take advantage of this are forthcoming.
2009-01-24 10:38:04 -08:00
Chris Robinson
3056f91ec5
Apply the dry filter to multi-channel sources
...
Unlike mono sources, they use 2 chained one-pole filters instead of 4
2008-12-10 11:54:13 -08:00
Chris Robinson
55b9ccc2de
Implement AL_EXTX_source_distance_model
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As with other EXTX extensions, this is subject to change and removal as the
spec gets worked on
2008-11-25 18:56:10 -08:00
Chris Robinson
181eb95b13
Use a better dB-to-linear gain convertion
2008-11-16 00:57:35 -08:00
Chris Robinson
c0ccd31a3e
Implement a new reverb effect
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Code created and graciously provided by Christopher Fitzgerald
2008-11-16 00:29:49 -08:00
Chris Robinson
010f7d12f4
Don't ramp gains when starting a sound from the beginning
2008-11-13 05:48:38 -08:00
Chris Robinson
b91c2e4a99
Include float.h if it exists, for _RC_CHOP and _MCW_RC
2008-10-14 09:47:32 -07:00
Chris Robinson
59a71b1454
Remove another unused source member
2008-10-10 01:31:31 -07:00
Chris Robinson
36f133a5ae
Use a modulo to keep the buffer position in range for looping sources
...
A high pitch and low buffer size can cause a lot of unnecessary iterations
otherwise, that just decrement the position
2008-10-10 01:13:32 -07:00
Chris Robinson
74a58c0d09
Clamp source position to the buffer size when it stops
2008-10-09 23:54:31 -07:00
Chris Robinson
bfa1107781
Remove unneeded source member variable
2008-10-09 23:44:48 -07:00
Chris Robinson
6e9e8239ef
Only send one channel through the wet path
2008-10-09 04:02:34 -07:00
Chris Robinson
af9932d28b
Increase max pitch to 65536
...
This should be safe now
2008-10-09 02:50:00 -07:00
Chris Robinson
87ff8a65e9
Simplify the lerp function
2008-10-09 02:32:47 -07:00
Chris Robinson
7b6f207790
Don't apply the wet path for multi-channel buffers
2008-10-09 02:28:52 -07:00
Chris Robinson
8672008e43
Skip mixing if the read position is beyond the end of the buffer
2008-10-09 01:17:39 -07:00
Chris Robinson
c8cd193346
The wet path should be silent if no effect is set on the slot
2008-10-09 01:07:02 -07:00
Chris Robinson
be292e5f0b
Don't hold the whole-number position in the fractional value
...
This will help prevent overflows when the max pitch is increased
2008-10-02 23:53:46 -07:00
Chris Robinson
3863dcc9cb
Use a new low-pass filter, based on the I3DL2 spec
...
Many thanks to Christopher Fitzgerald, for helping with it
2008-10-02 22:20:42 -07:00
Chris Robinson
6567cdd7b5
Air absorption factor is applied to the dB value, not linear gain
2008-09-22 17:01:47 -07:00
Chris Robinson
4a530e2146
Fixup some source parameter calculations
2008-09-16 07:36:48 -07:00
Chris Robinson
6bfdb57a5b
Use a 12dB/oct rolloff instead of 24 for the lowpass filter
2008-09-13 02:46:14 -07:00
Chris Robinson
fa76168683
Clear the end of the buffer when at the end of the queue and not looping
2008-09-06 14:08:53 -07:00
Chris Robinson
db541f3cfa
Remove unneeded source struct member
2008-08-15 17:43:07 -07:00
Chris Robinson
ac8c082b89
Overwrite the input wet sample with the output
2008-08-14 20:44:55 -07:00
Chris Robinson
22557070ec
Ramp channel gains to remove pops and clicks from abrupt changes
...
Thanks to Christopher Fitzgerald for helping me work on it
2008-08-14 05:43:52 -07:00
Chris Robinson
ef59901e7c
Set FPU mode to round toward zero for mixing
2008-08-08 07:32:21 -07:00
Chris Robinson
cfe620ccb5
Remove unnecessary casting
2008-08-08 00:21:25 -07:00
Chris Robinson
453b015225
Prevent a 0 or negative increment for the buffer position
...
Thanks to Christopher Fitzgerald for pointing these last two problems out
2008-08-05 20:51:30 -07:00
Chris Robinson
d3e5fcd13e
Fix some calculations for the reverb buffer
2008-07-26 01:57:04 -07:00
Chris Robinson
3e0f9cc716
Make the filter processing function inline
2008-07-26 00:58:54 -07:00
Chris Robinson
c7e49c9f57
Implement yet another low-pass filter
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This one using the Butterworth IIR filter design
2008-07-25 19:31:12 -07:00
Chris Robinson
559c786d0c
Specify padding per buffer, and make sure it's large enough for the filter step
2008-07-24 00:41:25 -07:00
Chris Robinson
c3a7480961
Don't advertise extra samples for mixing
2008-07-23 23:27:38 -07:00
Chris Robinson
a75e75aef5
Implement an alternative low-pass filter
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This method samples from the buffer so that it gets a time-correct 5khz stream,
which is subtracted from the original sample and has the high-frequency gain
applied, then added back.
A better method may be to average all the samples from the current one to the
one freq/5000 away, instead of bilinear filtering the two nearest freq/5000
apart. Processing cost will need to determine its viability
2008-07-23 22:29:53 -07:00
Chris Robinson
0042b1f80d
Implement doppler factor source property
2008-07-15 02:33:05 -07:00
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
