Chris Robinson
1c54018111
Move the WetBuffer into the effect slot object
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This should make it easier to support multiple slots
2009-04-11 17:04:55 -07:00
Chris Robinson
a8a4ff8af1
Constify some parameters
2009-03-13 23:08:15 -07:00
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
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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
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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
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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
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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
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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
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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
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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
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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
