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198 commits

Author SHA1 Message Date
Takashi Iwai
33d69ef33b Create rate converter plugin SDK 
Created a new rate converter plugin SDK.
A rate converter can be replaced as an extra plugin now.
The default rate converter is a built-in linear converter.

You can find a sample external converter in alsa-plugins package.
 2006-04-06 18:37:55 +02:00
Clemens Ladisch
8f61812f1c return ENODEV for disconnected devices 
Return -ENODEV instead of -ENOTTY for disconnected devices.
 2006-03-03 14:08:58 +00:00
Takashi Iwai
eccc92a34d Fix infinite parse of recursive definitions 
Fixed the infinite parse (and eventually segfault) of recursive definitions.
Also fixed the parse of a string slave PCM of direct plugins.
 2006-01-30 14:41:51 +00:00
Takashi Iwai
ffdb04c3ea Fix buffer allocation and mmap with plugins 
Fixed the bug producing silent tones with some combinations of plugins.
The internal buffer handling is now better (cleaner) integrated with
snd_pcm_generic_*().
 2005-09-02 16:36:40 +00:00
Takashi Iwai
dd37bb20ee Move poll_* callbacks to fast_ops 
Moved poll_* callbacks to fast_ops.
These callbacks may be called frequently indeed.
 2005-05-23 09:03:16 +00:00
Takashi Iwai
4d7c53d280 Add snd_pcm_hw_params_get/set_export_buffer() 
Add snd_pcm_hw_params_get/set_export_buffer() API functions.
They control to ensure the buffer export to other processes.
If this flag is set, the local buffer of a plugin is exported over IPC shm.
Otherwise the buffer can be handled only locally (no shm).

Also fixed Version file for 1.0.9.
 2005-05-19 16:59:04 +00:00
Takashi Iwai
a6d3b9e4e0 Remove poll_ask callback 
Removed poll_ask callbacks.
poll_ask function is merged to poll_descriptors callbacks.
 2005-05-18 10:50:09 +00:00
Takashi Iwai
842b573424 Add poll_descriptors and poll_descriptors_count callbacks 
Added poll_descriptors and poll_descriptors_count callbacks for multiple
poll_fd's.
 2005-05-18 10:45:06 +00:00
Jaroslav Kysela
f65d9f3108 Added snd_pcm_hw_params_set_rate_resample function 
- snd_pcm_hw_params_set_rate_resample()
- snd_pcm_hw_params_get_rate_resample()
 2005-04-12 12:09:55 +00:00
Takashi Iwai
72ad0e9ae7 Fix more CPU hang-up bugs in dmix 
- Fix CPU hang-up during snd_pcm_drain()
  A new internal function snd_pcm_wait_nocheck() to force to call poll().

- Clean up, fix status() callback of dmix
 2005-04-11 10:03:28 +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
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
Jaroslav Kysela
eafb492512 - added SYNC_PTR ioctl support for pcm_hw plugin 2004-05-22 10:14:32 +00:00
Clemens Ladisch
4861d237e6 define SND_PCM_INFO_RESUME 2004-05-03 14:37:53 +00:00
Takashi Iwai
965222c3d9 fixed compile warnings. 2004-04-15 12:52:49 +00:00
Takashi Iwai
494f3e66e4 fixed the handling of EINTR in read/write. 
EINTR can be returned during ACPI suspend/resume.
 2004-04-15 12:22:26 +00:00
Jaroslav Kysela
7c201b510a - added poll_ask callback to mangle avail_min (rate_plugin as example) 
- added mangling of avail_min to rate_plugin
- added poll_fd_count variable
- FIXME: move poll_revents callback to fast_ops
 2004-03-17 11:48:14 +00:00
Jaroslav Kysela
131d6610fc Fixed file plugin - mmap access was broken and revents were not handled correctly 2004-02-08 10:19:52 +00:00
Takashi Iwai
08874160c8 - fixed the type punning (compilation warnings with the recent GCC). 2004-01-31 12:16:32 +00:00
Jaroslav Kysela
63c19961b9 Takashi: added shadow pcm to avoid problem with plug plugin and mmaped access 2003-08-08 09:06:41 +00:00
Jaroslav Kysela
573f85dc1d - added shm area manager code 
- fixed parsing of period_size/buffer_size options for dmix, dsnoop and
  dshare plugins
 2003-04-23 12:41:55 +00:00
Jaroslav Kysela
7b09000813 Removed snd_pcm_hwdiff() function 2003-02-22 17:53:01 +00:00
Jaroslav Kysela
2dab1dfbc3 Removed snd_pcm_hwptr(). 
Added snd_pcm_hwdiff() and snd_pcm_forward().
Returned the behaviour for snd_pcm_mmap_begin().
 2003-02-22 17:19:02 +00:00
Jaroslav Kysela
fbd99fdec0 Added snd_pcm_hwptr() and enhanced snd_pcm_mmap_begin() for no xrun mode. 2003-02-22 10:19:53 +00:00
Jaroslav Kysela
b5316c86cc Fixed compilation problem for dmix (donot_close) 2003-02-12 11:49:47 +00:00
Jaroslav Kysela
af89cefd99 More changes for dmix plugin: 
- added poll_events to main pcm structure
  - added poll_revents callback to pcm->ops structure
  - fixed snd_pcm_wait() - call revents function and enhanced
    error code reporting
DMIX plugin:
  - more complete code (works at least for one instance)
  - still no "mix" code (it's silent)
 2003-02-11 18:14:43 +00:00
Jaroslav Kysela
3b6638e8ce More pcm params functions returns an error rather than do assert(). 
Some cleanups in refine.
Added more debug code to refine.
Improved dmix refine method.
 2003-02-08 16:35:24 +00:00
Jaroslav Kysela
8720faaccb Cleanups in IPC stuff. 
Cleanups in snd_pcm_close().
Added initial code for dmix plugin:
  - only skeleton, but all major problems should be solved
 2003-02-04 14:48:51 +00:00
Takashi Iwai
1b41de0653 - fixed the rate selection in the plug layer: 
the multiples of the given rate is chosen if available.
  the nearest rate is selected as usual if not available.
 2003-01-27 11:34:50 +00:00
Jaroslav Kysela
0d7d11889d Added missing snd_dlclose() calls 2002-11-07 15:18:45 +00:00
Jaroslav Kysela
6979732fa5 Changed sw_params to follow hw_params (unify functions) 2002-10-19 19:09:46 +00:00
Jaroslav Kysela
8205a95376 Replaced snd_pcm_avail() with snd_pcm_hwsync() 2002-10-12 11:49:53 +00:00
Jaroslav Kysela
dac0626b9f Added snd_pcm_hw_params_current() function and clear() functions for structures 2002-10-12 10:38:43 +00:00
Jaroslav Kysela
e859cf2644 Implemented snd_pcm_avail() function. 
More documentation updates for snd_pcm_avail_update() and snd_pcm_delay().
Updated behaviour of read/write functions (wait when buffer is full) to
follow kernel.
 2002-10-11 18:39:24 +00:00
Takashi Iwai
25e41cf1e8 fixed the build without versioned symbols. 
the rc4 symbols are defined as __ prefix, which are aliased in
pcm.h as well as the versioned symbol binary.
 2002-10-10 11:01:18 +00:00
Jaroslav Kysela
f0e5677f29 Fixed mmap_xxxx_delay() to follow kernel code 2002-10-09 06:44:45 +00:00
Jaroslav Kysela
b9343e0834 - unified snd_pcm_hw_params_* functions 
- added backward compatibility for older non-compatible functions
- added --with-compat-rc3 to configure script to build library
  backwards compatible with 0.9.0rc3
- added symbol versioning like libc.so.6
  - ALSA_0.9      - alsa base
  - ALSA_0.9.0rc4 - first set of new functions (snd_pcm_hw_params_*)
 2002-09-17 12:33:05 +00:00
Jaroslav Kysela
16b3bf447c Enhanced bitmasks in PCM - added support for more formats by Takashi and me 2002-06-26 02:04:11 +00:00
Jaroslav Kysela
c941c548f8 Moved ring buffer pointers and added a mechanism to transfer them via shm 2002-04-23 15:51:29 +00:00
Jaroslav Kysela
e128bf856e Cleaned the mmap_commit implementations in plugins. 
Added undo callbacks for snd_pcm_plugin based plugins.
  - helpers when mmap_commit proceed only a partial transfer
Fixes to avail_update implementation in pcm_hw.c.
 2002-02-21 15:01:34 +00:00
Jaroslav Kysela
8c1887d7af Moved some prototypes from src/pcm/pcm_plugin.h to include/pcm_plugin.h. 
Merged src/pcm/atomic.h to include/iatomic.h.
Added initial description of hw and hooks plugins.
 2002-01-12 10:52:42 +00:00
Jaroslav Kysela
3e3df2d32b Updated GNU GPL license (address). 
Changed GNU LGPL licence from 2.0 to 2.1.
 2001-12-30 09:22:54 +00:00
Jaroslav Kysela
48ae96f50c Added error passing to some refining functions to disable abort when 
no configuration can be found.
 2001-12-11 15:10:27 +00:00
Takashi Iwai
e457d1f0c0 Removed inclusion of asm/system.h 2001-12-10 16:43:20 +00:00
Jaroslav Kysela
b63e44aab0 Synchronized snd_pcm_write_areas and snd_pcm_read_areas with the kernel 
write/read functions.
Changed snd_pcm_xfer_areas_func_t to return snd_pcm_sframes_t (pass errors).
 2001-12-09 12:32:42 +00:00
Jaroslav Kysela
0917ba63b0 Changed result of mmap_commit callback 
(follows description of snd_pcm_mmap_commit function).
 2001-12-08 21:02:20 +00:00
Jaroslav Kysela
bb749766d4 Added lfloat plugin code (not finished) 2001-11-26 16:08:49 +00:00
Jaroslav Kysela
66865e1df9 Added more ACCBIT masks 2001-11-26 15:20:32 +00:00
Jaroslav Kysela
3c59c6b11d Added power management functions and defines. 2001-09-26 13:57:04 +00:00
Jaroslav Kysela
f5709d953d Moved SND_PCM_INFO defines from asoundlib.h to pcm_local.h. 2001-07-30 12:13:49 +00:00