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925b5954c3
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302 Commits

Author SHA1 Message Date
Max Kellermann
925b5954c3 pcm/Dsd2Pcm: add integer-only implementation 2020-01-17 16:17:32 +01:00
Max Kellermann
235b6980b8 pcm/Dsd2Pcm: add optimized stereo version 
This code path is 2% faster.
 2020-01-14 23:38:46 +01:00
Max Kellermann
ee46150329 pcm/Dsd2Pcm: add class MultiDsd2Pcm 2020-01-14 23:29:03 +01:00
Max Kellermann
79c585bf03 pcm/PcmDsd: use size_t 2020-01-14 23:28:34 +01:00
Max Kellermann
becd81f771 pcm/PcmDsd: manage Dsd2Pcm instances, not pointers 2020-01-14 23:26:34 +01:00
Max Kellermann
2073a2c1b0 pcm/Dsd2Pcm: remove unused "lsbf" flag 2020-01-14 23:20:45 +01:00
Max Kellermann
3f3104348e pcm/Dsd2Pcm: add "restrict" attribute 2020-01-14 23:20:36 +01:00
Max Kellermann
4038d8527f pcm/Dsd2Pcm: eliminate "& 0xff" 2020-01-14 22:56:28 +01:00
Max Kellermann
3565f0c8ce pcm/Dsd2Pcm: move code to TranslateSample() 
10% speedup.  Strange, huh?
 2020-01-14 22:51:20 +01:00
Max Kellermann
9647b2cb01 pcm/Dsd2Pcm: move code to ApplySample() 
For some reason, this speeds up the library by 2%.
 2020-01-14 22:43:11 +01:00
Max Kellermann
2d5bf53240 pcm/Dsd2Pcm: use sizet_t instead of int 2020-01-14 22:40:54 +01:00
Max Kellermann
a65f7b1006 pcm/Dsd2Pcm: use std::fill_n() 2020-01-14 22:39:54 +01:00
Max Kellermann
bc5b647053 pcm/Dsd2Pcm: use sizet_t instead of unsigned 2020-01-14 22:37:30 +01:00
Max Kellermann
1708ae3e3c pcm/Dsd2Pcm: use uint8_t instead of unsigned char 2020-01-14 22:36:50 +01:00
Max Kellermann
6bfbc5d320 pcm/Dsd2Pcm: move code to CalcOutputSample() 2020-01-14 22:25:54 +01:00
Max Kellermann
e7483bc5bc pcm/Dsd2Pcm: make variables more local 2020-01-14 22:21:32 +01:00
Max Kellermann
b911ec1a29 pcm/Dsd2Pcm: convert to class 2020-01-14 22:16:02 +01:00
Max Kellermann
ca2633bf26 pcm/Dsd2Pcm: remove unused function dsd2pcm_clone() 2020-01-14 22:15:05 +01:00
Max Kellermann
566ac171f5 pcm/Dsd2Pcm: generate ctables at compile time 2020-01-14 22:11:12 +01:00
Max Kellermann
4d95402e4e pcm/Dsd2Pcm: move formula to CalculateCtableValue() 2020-01-14 22:11:12 +01:00
Max Kellermann
4d102c4770 pcm/Dsd2Pcm: convert parameter to bool 2020-01-14 22:11:12 +01:00
Max Kellermann
91bc41ea20 pcm/Dsd2Pcm: add noexcept and remove extern 2020-01-14 22:11:12 +01:00
Max Kellermann
e565dcf18c pcm/dsd2pcm: convert to C++ 2020-01-14 22:05:58 +01:00
Max Kellermann
5a87fc7c26 pcm/dsd2pcm: remove unused sources 2020-01-14 22:05:27 +01:00
Max Kellermann
44d7a1d8d2 pcm/Traits: drop "_type" from type names 2020-01-03 16:01:44 +01:00
Max Kellermann
683d5848f4 release v0.21.17 
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Merge tag 'v0.21.17'

release v0.21.17
 2019-12-16 23:44:20 +01:00
Max Kellermann
dc3c0c8866 pcm/Convert, ...: add missing include for std::runtime_error 2019-12-16 22:52:50 +01:00
Max Kellermann
f357f743a3 pcm/Volume: use transform_n() 2019-08-10 12:05:37 +02:00
Max Kellermann
91e565d92e pcm/PcmFormat: use transform_n() 2019-08-10 12:05:35 +02:00
Max Kellermann
af99f9fc90 pcm/Volume: convert S16 to S24 to preserve quality and reduce noise 
Applying software volume to S16 samples means several bits of
precision are lost; at 25% volume, two bits are lost.  Additionally,
dithering adds some noise.

The problem gets worse when you apply the software volume code twice:
for the software mixer volume, and again for the replay gain.  This
loses some more precision and adds even more dithering noise, which
can become audible (see
https://github.com/MusicPlayerDaemon/MPD/issues/542).

By converting everything to 24 bit, we need to shift only two bits to
the right instead of ten, losing nearly no precision, and dithering is
not needed.  Even if the output device is unable to play S24 directly,
we can convert back to S16 with only one stage of dithering.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/542
 2019-07-30 20:03:37 +02:00
Max Kellermann
326c6ae615 pcm/Volume: add variable "dest_size" 2019-07-05 21:01:09 +02:00
Max Kellermann
5fa7610264 pcm/Volume: Open() returns output sample format 
Prepare for a new mode which may convert to a different sample format
when applying volume, to reduce dithering.
 2019-07-05 19:03:00 +02:00
Max Kellermann
1c757f8c1c pcm/Volume: allow any exception 2019-07-05 19:01:46 +02:00
Max Kellermann
06fbbe2d7b pcm/Volume: calculate PCM_VOLUME_1 2019-07-05 18:26:26 +02:00
Max Kellermann
21d91cb1d1 pcm/Volume: fix API documentation 2019-07-05 18:26:14 +02:00
Max Kellermann
d663f81420 include cleanups (powered by iwyu) 2019-07-05 09:59:58 +02:00
Max Kellermann
beed004b10 pcm/Export: add GetSilence() 2019-06-26 16:04:46 +02:00
Max Kellermann
34c6337887 pcm/Export: add GetInputBlockSize(), GetOutputBlockSize() 2019-06-26 15:49:08 +02:00
Max Kellermann
2093e53641 pcm/Export: add GetInputFrameSize() 2019-06-26 15:48:18 +02:00
Max Kellermann
2f243f2295 pcm/Export: rename GetFrameSize() to GetOutputFrameSize() 2019-06-26 15:46:49 +02:00
Max Kellermann
e69fd0300a pcm/Export: rename CalcSourceSize() to CalcInputSize() 2019-06-26 15:46:05 +02:00
Max Kellermann
f43cafbf7d pcm/Export: eliminate the AudioFormat parameter from GetFrameSize() 2019-06-26 15:42:47 +02:00
Max Kellermann
53faf77d20 pcm/Export: use the "channels" attribute in GetFrameSize() 2019-06-26 15:41:07 +02:00
Max Kellermann
bf574dcb0a pcm/RestBuffer: make internal methods private 2019-06-26 14:44:20 +02:00
Max Kellermann
72b8f33272 pcm/Export: split src_sample_format from alsa_channel_order 
Combining these two in one single value saves some memory, but is
complicated and we may need the src_sample_format for new features
later.
 2019-06-18 12:19:40 +02:00
Max Kellermann
a17f420d6b pcm/Export: update API documentation 2019-06-18 12:19:40 +02:00
Max Kellermann
bf26adf555 pcm/Dsd{16,32}: stash odd frames away for the next call 
Similar to commit 32380d1db0, these are
the final parts for really fixing
https://github.com/MusicPlayerDaemon/MPD/issues/469
 2019-06-18 11:19:27 +02:00
Max Kellermann
0cc94fe30c pcm/Dsd{16,32}: convert public function to stateful class 2019-06-18 10:58:55 +02:00
Max Kellermann
d5d5705213 pcm/Export: update API documentation 2019-06-18 10:58:26 +02:00
Max Kellermann
96d74e77eb pcm/Dsd{16,32}: move the conversion loop to a separate function 2019-06-17 22:51:01 +02:00