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978 commits

Author SHA1 Message Date
Takashi Iwai
f9b9015245 Fix resmgr support 
Call normal open() before trying with res_open_device().
snd_open_device() is defined to do this procedure.
 2005-02-11 16:35:24 +00:00
Takashi Iwai
237d46cfb6 Fix compile warnings 
Fixed compile warnings with unused variables.
 2005-02-09 17:28:08 +00:00
Takashi Iwai
94c4cdcd30 Add external PCM plugin SDK (draft version) 
Added the external PCM plugin SDK (draft version).
This can be used to create external PCM plugins.
Example codes are found in alsa-plugins directory.
 2005-02-08 20:57:51 +00:00
Takashi Iwai
d7a32ca06b Fix hw_params of lfloat plugin 
Fixed the bogus hw_refine call in hw_params of lfloat plugin.
 2005-02-08 20:48:39 +00:00
Takashi Iwai
22846c486f Split arch-dependent codes of dmix 
Split arch-dependent codes of dmix to separate files.
 2005-02-08 20:28:29 +00:00
Clemens Ladisch
c92969845d start pcm when draining in prepared state 
For consistency with hw pcms, dmix/dshare pcms are started
when draining in the prepared state with a non-empty buffer.
 2005-02-07 09:13:58 +00:00
Takashi Iwai
77c925a71f Add resmgr support 
Added the support for resmgr.  A new configure option --with-resmgr is added
to enable the resmgr support.
 2005-01-26 10:50:28 +00:00
Takashi Iwai
7e74f2ef1b Fix the available formats 
Fixed the available formats to be set in hw_refine.
 2005-01-21 19:38:10 +00:00
Takashi Iwai
680a60a688 Use snd_config_get_bool() 
Cleanup using snd_config_get_bool() in possible places.
 2005-01-21 19:37:00 +00:00
Jaroslav Kysela
a5831c7300 The stream linking problem for pcm_multi.c should be fixed now 
- extended link_fd callback
- added snd_pcm_generic_link2()
- added _snd_pcm_link_descriptors()
 2005-01-20 18:37:13 +00:00
Takashi Iwai
6cac58179b Add pcm_generic.h 
Added the missing pcm_generic.h.
 2005-01-20 17:46:33 +00:00
Jaroslav Kysela
836987aa99 improved stream linking and plugin code cleanups 
- added link/unlink/link_fd fast_ops callbacks
- moved code from snd_pcm_link to pcm_hw.c
- moved "empty" routines pointing to slave to pcm_generic.c
- introduced snd_pcm_generic_t
 2005-01-20 15:07:51 +00:00
Takashi Iwai
71ee169307 Fix compile warning 
Fixed compile warning with printf() and timeval sizes.
 2005-01-19 13:43:25 +00:00
Takashi Iwai
0994cf7aae Fixed compile warning 
Fixed compile warning.  The strlen() returns size_t, not integer.
 2005-01-19 13:37:14 +00:00
Takashi Iwai
340018db8a Fix a typo 
Fixed a typo in comment by Kirill Smelkov <kirr@mns.spb.ru>
 2005-01-13 17:28:11 +00:00
Takashi Iwai
ff9c030e65 Use snd_config_get_bool() 
Clean up the code, using snd_config_get_bool().
 2005-01-13 15:46:34 +00:00
Takashi Iwai
5211c26927 Fix compile warning 
Fixed compile warning due to signed/unsigned comparison.
 2005-01-12 11:19:47 +00:00
Takashi Iwai
c83e9d7451 Fix handling of DISCONNECT state 
Fixed the handling of DISCONNECT state in dmix (not to set bogus error
values to state).
 2005-01-11 17:42:49 +00:00
Takashi Iwai
c67584ec65 Clear sw_params struct at initialization 
Do zero-clear the sw_params struct in hw_params, just to be sure.
This makes valgrind happy.
 2005-01-11 15:11:09 +00:00
Takashi Iwai
a920ca39db Performance optimization 
The performance of rate conversion is optimized.
- with S16 format, no format conversion is done
- linear polation of expansion uses 16bit resolution
 2005-01-04 13:57:51 +00:00
Takashi Iwai
c7feb066b1 Support stereo volume control 
softvol supports stereo volume controls.
Fixed the dB calculation, too.
 2005-01-04 11:37:29 +00:00
Takashi Iwai
7e92411760 Fix missing declaration 
Fixed the missing declration of softvol plugin.
 2005-01-03 18:19:23 +00:00
Takashi Iwai
82e408d08b Set max volume as default for softvol 
Set max volume as default for softvol.
 2005-01-03 17:12:51 +00:00
Takashi Iwai
199d207423 Change the behavior with hardware volume controls 
When a hardware volume control is given, softvol plugin simply
passes the slave PCM without any additional changes.
 2005-01-03 14:37:39 +00:00
Takashi Iwai
0732cce6f0 Add accessor to user control elements 
Added accessor functions to user control elements, snd_ctl_elem_add_*(),
and_ctl_elem_remove() and snd_ctl_elem_info_is_user().
 2005-01-03 11:52:39 +00:00
Takashi Iwai
30f35c1f7a Add softvol PCM plugin 
The softvol PCM plugin is added.  It applies the software volume attenuation,
which may be useful for codecs without volume controls.

Currently, the control is only mono.  The attenuation is applied to all
channels equally.  The control is probed and automatically created
when not exists yet.
 2004-12-27 14:40:19 +00:00
Clemens Ladisch
5c9ee5ef03 fix changed error message handling 
In the last error message handling change, some error conditions
didn't get properly inverted.
 2004-12-23 08:15:46 +00:00
Takashi Iwai
2b54677fdb Change error message handling 
Change the handling of non-fatal errors.  Now the non-fatal error
messages are not shown in stderr and no assert() as default.  The
behavior can be changed with LIBASOUND_DEBUG environment variable.
 2004-12-21 14:11:00 +00:00
Takashi Iwai
73aa2549d9 Add preamble value configuration for iec958 plugin 
The preamble values can be defined in iec958 plugin configuration.
As default, Z/Y/X=8/4/2 is used.  CMI8338 has different values,
so override in its configuration.
 2004-12-15 15:17:36 +00:00
Kirill Smelkov
0256e1e8c9 Fixed few typos in documentation. 
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
 2004-12-08 19:22:42 +00:00
Andreas Fenkart
0ed778404d Fixes variable shadow problem in capture direction 
My gnomemeeting hung when accessing the microphone.
The problem was that the rate variable was not initialized when jumping to
the __partial label.
Signed-off-by: Andreas Fenkart <afenkart@gmx.ch>
 2004-11-22 06:40:10 +00:00
Jaroslav Kysela
457b8777ab fix for capture for case when status/control structures are not mmaped 2004-11-16 16:03:01 +00:00
Jaroslav Kysela
6987a8555c appl_ptr sync fix when status/control structures are not mmaped 
The prepare and reset ioctls can modify appl_ptr, thus the user space
must take modified appl_ptr from driver.
 2004-11-16 15:05:49 +00:00
Jaroslav Kysela
2d7ca56e2a Return correct error in snd_pcm_wait() after snd_pcm_poll_descriptors() call 2004-11-12 20:27:31 +00:00
Clemens Ladisch
e156d54c84 remove duplicate snd_pcm_null_fwd() function 2004-11-08 08:49:19 +00:00
Jaroslav Kysela
b7e8f57314 Try to fix period_time/period_size problems for direct plugin slaves 2004-10-29 10:56:13 +00:00
Jaroslav Kysela
090fa69b51 Added check_std_error to avoid extra verbosity 2004-09-28 10:54:05 +00:00
Takashi Iwai
83a533d1a7 [alsa-lib] Avoid zero division 
Check the invalid parameters in snd_pcm_sw_params() beforehand to avoid
zero division.
 2004-09-17 17:36:18 +00:00
Markus Grabner
3a8bfd43d7 Fix the downsampling noise problem 
Description: The patch replaces the nearest neighbor downsampling method
in the sample rate conversion plugin by linear interpolation of the closest
two samples, thus significantly reducing the resampling noise.

Signed-off-by: Markus Grabner <grabner@icg.tu-graz.ac.at>
 2004-09-16 10:02:12 +00:00
Takashi Iwai
8ac16f151c [ALSA-LIB] suppress PAUSE and RESUME for direct plugins 
Direct plugins don't work well with PAUSE and RESUME.  The info
bits are cleared for these plugins to suppress these features.
 2004-09-15 18:45:51 +00:00
Stas Sergeev
6f515096d9 [ALSA-LIB] dmix: dont forget to return -EINVAL on errors 
snd_pcm_dmix_open() returns success if the open fails attempting
to open not the HW plugin (dmix seems to be limited to use only
the HW plugin right now). This leads to memory corruptions and
eventually a SIGSEGV. The attached patch fixes the omission.

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
 2004-09-15 18:44:24 +00:00
Jaroslav Kysela
e35885fa65 Small optimization 2004-08-27 11:14:21 +00:00
Jaroslav Kysela
06976cbcce Fixed problem with the route plugin and ttable (an extra route plugin was 
inserted accidently).
 2004-08-11 15:09:05 +00:00
James Courtier-Dutton
6170a88309 Signed-off-by: James Courtier-Dutton <James@superbug.demon.co.uk> 
This patch fixes a number of different bugs in pcm_rate.c.
1) Resampling now works for rate 192000 -> 8000.
2) zero samples are not accidentally inserted into the stream any more.
3) Corrects period size calculations.
4) Prevents avail_min and xfer_align being less than 1.
 2004-08-09 06:31:41 +00:00
Jaroslav Kysela
509e30494f compilation fix 2004-05-24 18:44:04 +00:00
Jaroslav Kysela
0c468bf109 Fixed wrong jump for 32-bit mixing 2004-05-24 18:40:11 +00:00
Takashi Iwai
c11a1fc9be fixed documents to process properly via doxygen. 2004-05-24 14:57:47 +00:00
Jaroslav Kysela
eafb492512 - added SYNC_PTR ioctl support for pcm_hw plugin 2004-05-22 10:14:32 +00:00
Takashi Iwai
5a2c2e0295 fixed unneeded cast. 2004-05-21 15:10:58 +00:00
Takashi Iwai
01f217d581 fixed debug messages by Erik Inge Bolso. 2004-05-04 15:54:01 +00:00