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278 Commits

Author SHA1 Message Date
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
Max Kellermann
28e07e900f pcm/Export: convert the DSD bools to an enum 
These options are exclusive.
 2019-06-17 22:35:00 +02:00
Max Kellermann
32380d1db0 pcm/Dop: stash odd frames away for the next call 
First part of the "real" fix for
https://github.com/MusicPlayerDaemon/MPD/issues/469
 2019-06-17 22:18:44 +02:00
Max Kellermann
c9f1354e4d pcm/RestBuffer: new utility class 2019-06-17 22:18:41 +02:00
Max Kellermann
e3f9e96eef pcm/Dop: convert public function to stateful class 
Preparing to add more state.
 2019-06-17 22:16:29 +02:00
Max Kellermann
8f9b3cbf0e pcm/Dop: add separate dsd_buffer for DSD_U16/32 
The dop_buffer will be moved out soon.
 2019-06-17 22:11:23 +02:00
Max Kellermann
458a1beed9 AudioFormat: move MAX_CHANNELS to pcm/ChannelDefs.hxx 
Reduce header dependencies.
 2019-06-17 22:11:08 +02:00
Max Kellermann
33f5e03e80 Merge branch 'v0.21.x' 2019-06-17 22:06:54 +02:00
Max Kellermann
d478bdda8e pcm/Export: document that Export() may return an empty buffer 2019-06-17 21:07:29 +02:00
Max Kellermann
e87f0ca771 pcm/Pcm*: drop more "Pcm" prefixes from source file names 2019-06-17 11:17:48 +02:00
Max Kellermann
a139279575 Copyright year 2019 2019-06-17 11:17:30 +02:00
Max Kellermann
9fcd33cc8d pcm/Dop: move the conversion loop to separate function 2019-06-16 12:23:48 +02:00
Max Kellermann
96ff6b9b8b pcm/Dop: remove redundant inline keywords 2019-06-16 12:23:38 +02:00
Max Kellermann
fd5e74dbd0 pcm/Pcm{Dop,Export}: drop "Pcm" prefix 2019-06-16 12:11:44 +02:00
Max Kellermann
b64571f4a5 pcm/Export: update API documentation 2019-06-16 11:52:57 +02:00
Max Kellermann
6addc9d6e0 pcm/PcmConvert: remove unused attribute "dest_format" 2019-04-04 21:06:28 +02:00
Max Kellermann
e78d825059 pcm/PcmConvert: eliminate Open() and Close() 
Let the constructor and destructor do this.  This means that all users
have to be converted to allocate PcmConvert dynamically.
 2019-04-04 21:01:08 +02:00
Max Kellermann
f2cacaf6b6 AudioFormat, pcm/Dsd*: remove redundant inline keywords from constexpr functions 2019-03-08 10:29:03 +01:00
Max Kellermann
c176d94598 system/ByteOrder: move to util/ 2019-03-08 10:21:10 +01:00
Max Kellermann
ce49d99c2f check.h: remove obsolete header 
Since we switched from autotools to Meson in commit
94592c1406, we don't need to include
`config.h` early to properly enable large file support.  Meson passes
the required macros on the compiler command line instead of defining
them in `config.h`.

This means we can include `config.h` at any time, whenever we want to
check its macros, and there are no ordering constraints.
 2018-11-19 16:33:49 +01:00
Max Kellermann
f5c9071494 *: copyright year 2018 2018-10-31 17:54:59 +01:00
Max Kellermann
c97469283c pcm: build dsd2pcm only if -Dtest=true 2018-10-30 13:31:43 +01:00
Max Kellermann
804ccddf7e pcm/Clamp: convert to constexpr 2018-10-30 00:08:25 +01:00
Max Kellermann
bb5918932b pcm/PcmUtils: rename to Clamp.hxx 2018-10-30 00:05:58 +01:00
Max Kellermann
aa77bc323f pcm/FloatConvert: make IntegerToFloatSampleConvert::Convert() constexpr 2018-10-29 23:52:25 +01:00