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47e2f4e9
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2017-01-24T20:30:48
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audio: libsamplerate can't resample in-place; make space for a copy if needed.
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c7f9dcb6
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2017-01-24T15:52:22
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audio: Offer a hint for libsamplerate quality/speed tradeoff.
This defaults to the internal SDL resampler, since that's the likely default
without a system-wide install of libsamplerate, but those that need more can
tweak this.
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1da3a337
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2017-01-24T10:09:29
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audio: Fix static analysis concerns about a dead assignment.
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8f627c1c
|
2017-01-24T00:51:33
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audio: Make sure SDL_AudioStream's work buffer is 16-byte aligned, for SIMD.
Note the giantic FIXME, though!
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17dcee20
|
2017-01-24T00:17:40
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audio: Streams now resample in-place. Removed second allocated buffer.
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b5eeab77
|
2017-01-24T00:08:24
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audio: allow stereo Sint16 resampling fast path in SDL_AudioStream.
This currently favors libsamplerate over the fast path (quality over speed),
but I'm not sure that's the correct approach, as there may be surprising
changes in performance metrics depending on what packages are available on
a user's system. That being said, currently, the only thing with access to
SDL_AudioStream is an SDL audio device's thread, and it might be mostly idle
otherwise, so maybe this is generally good.
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a80cb672
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2017-01-24T00:03:36
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audio: Fixed off-by-one error in upsampling.
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dad07f96
|
2017-01-23T16:45:50
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audio: Resampler now special-cases stereo and mono processing.
Turns out that iterating from 0 to channels-1 was a serious performance hit!
These cases now tend to match or beat the original audio resampler's speed!
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8ce6ddf1
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2017-01-23T16:42:47
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audio: Fixed incorrect pointer in SDL_ResampleCVT_si16_c2().
Forgot to update this when we changed this to process in-place. Whoops!
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3594bf8e
|
2017-01-23T01:05:44
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audio: Wired up new SSE code to build system.
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64056e81
|
2017-01-23T00:57:19
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audio: Added SSE3 implementation of SDL_ConvertStereoToMono().
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8855daac
|
2017-01-22T23:48:15
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audio: Make the simple resampler operate in-place.
This allows us to avoid an extra copy, allocate less memory and reduce cache
pressure. On the downside: we have to do a lot of tapdancing to resample the
buffer in reverse when the output is growing.
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202ab30c
|
2017-01-22T20:27:48
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audio: Special case for resampling stereo AUDIO_S16SYS audio data.
This is a fairly common case, so we avoid the conversion to/from float here.
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a7f86f2f
|
2017-01-22T20:18:59
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audio: don't cast to double in SDL_ConvertStereoToMono().
It's expensive and (hopefully) unnecessary. If this becomes an overflow
problem, we could multiply both values by 0.5f before adding them, but let's
see if we can get by without the extra multiplication first.
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83454c82
|
2017-01-20T16:26:24
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audio: removed conditional from simple resampler's inner loop.
We never seem to overflow the source buffer now; this might have been a
leftover from a bug that was covered by Vitaly's fixes?
Removing this conditional makes the resampler 10-20% faster. Left an
assert in there for debug builds, in case this still happens.
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3e1679c8
|
2017-01-18T02:11:56
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|
audio: Several fixes to "simple" resampler (thanks, Vitaly!).
Fixes Bugzilla #3551.
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1e66d457
|
2017-01-15T05:01:59
|
|
audio: Some fixes to the audio data type converter code.
Removed some needless things ("len / sizeof (Uint8)"), and made sure the
int32 -> float code uses doubles to avoid working with large integer values
in a 32-bit float.
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bf11cd50
|
2017-01-09T20:37:52
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|
Fixed bug 3552 - Building SDL in release mode fails under VS 2017 RC
Lukasz Biel
Tried to compile SDL2 using newest version of VS.
Got:
SDL_audiocvt.obj : error LNK2019: unresolved external symbol memcpy referenced in function SDL_ResampleCVT
1>E:\Users\dotPo\Lib\SDL\VisualC\x64\Release\SDL2.dll : fatal error LNK1120: 1 unresolved externals
whole compilation process: http://pastebin.com/eWDAvBce
Steps to reproduce:
clone http://hg.libsdl.org/SDL using tortoise hg,
open SDL\VisualC\SDL.sln,
when promted if should retarget solution click ok,
select release x64 build type,
Build/Build Solution
attempt 2, using Visual Studio cmake support:
open folder SDL\
select release x64 build type,
run CMake\Build CMakeLists.txt
build fails
When switched to debug build type, buils succeeds in both cases.
VS 2017 is still beta.
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23020f92
|
2017-01-09T16:31:57
|
|
audio: Don't ever use libsamplerate in the SDL_AudioCVT codepath.
It causes audio pops if you're converting in chunks (and needs to
allocate/initialize/free on each convert). We'll either adjust this interface
when we break ABI for 2.1 to make this usable, or publish the SDL_AudioStream
API for those that want a streaming solution.
In the meantime, the "simple" resampler produces "good enough" audio without
pops and doesn't have to be initialized, so that'll do for now on the
SDL_AudioCVT interface.
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063c9d40
|
2017-01-09T06:00:58
|
|
audio: Replaced older resamplers in SDL_AudioCVT with the new ones.
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38854e03
|
2017-01-08T16:18:49
|
|
audio: Improvements in channel conversion code.
|
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d005dc21
|
2017-01-08T14:23:15
|
|
audio: Patched to compile with libsamplerate support.
|
|
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19e937fc
|
2017-01-08T14:18:03
|
|
audio: libsamplerate loading now happens once at init time.
|
|
|
98cc9d10
|
2017-01-08T14:17:09
|
|
Fixed coding style on a function signature.
|
|
|
df25258a
|
2017-01-06T20:43:53
|
|
Added configure and cmake support for libsamplerate
|
|
|
c5825b69
|
2017-01-06T21:23:51
|
|
audio: Don't call a NULL function pointer when clearing audio streams.
(Partially?) fixes Bugzilla #3547.
|
|
|
cbe44f7f
|
2017-01-06T02:16:26
|
|
Added support for using libsamplerate to do audio resampling
|
|
|
3443dc19
|
2017-01-05T23:53:46
|
|
Don't do any audio conversion if none is necessary
|
|
|
992124d4
|
2017-01-06T01:02:58
|
|
audio: Fixed SDL_AudioStreamGet() function parameters.
There was a draft of this where it did audio conversion into the final buffer,
if there was enough room available past what you asked for, but that interface
got removed, so the parameters didn't make sense (and we were using the
wrong one in any case, too!).
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|
|
3761b5f6
|
2017-01-05T20:11:19
|
|
Fixed a few compiler warnings.
|
|
|
30178a9b
|
2017-01-05T19:29:38
|
|
audio: Added SDL_AudioStream. Non-power-of-two resampling now works!
|
|
|
f12ab8f2
|
2017-01-05T19:12:20
|
|
audio: More effort to improve and simplify audio resamplers.
|
|
|
45b774e3
|
2017-01-01T18:33:28
|
|
Updated copyright for 2017
|
|
6380d5c2
|
2016-11-07T21:10:01
|
|
Fixed audio conversion for unsigned 16 bit data.
|
|
|
6ed82130
|
2016-11-05T01:52:28
|
|
Fixed Windows build
|
|
|
a17abf10
|
2016-11-05T03:56:55
|
|
Also patched to compile on C89 compilers.
|
|
|
067f0c84
|
2016-11-05T03:53:59
|
|
Patched to compile on C89 compilers.
|
|
|
f3456e9a
|
2016-11-05T02:34:38
|
|
Reworked audio converter code.
This no longer uses a script to generate code for every possible type
conversion or resampler. This caused a bloat in binary size and and compile
times. Now we use a handful of more generic functions and assume staying in
the CPU cache is the most important thing anyhow.
This shrinks the size of the final build (in this case: macOS X amd64, -Os to
optimize for size) by 15%. When compiling on a single core, build times drop
by about 15% too (although the previous cost was largely hidden by multicore
builds).
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|
|
42065e78
|
2016-01-02T10:10:34
|
|
Updated copyright to 2016
|
|
|
0e45984f
|
2015-06-21T17:33:46
|
|
Fixed crash if initialization of EGL failed but was tried again later.
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly
uninitialized data structure if loading the library first failed. A later try to
use EGL then skipped initialization and assumed it was previously successful
because the data structure now already existed. This led to at least one crash
in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was
dereferenced to make a call to eglBindAPI().
|