/usr/src/packages/BUILD/alsa-lib-1.0.25/src/pcm/pcm_route.c File Reference
PCM Route & Volume Plugin Interface.
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Functions |
int | snd_pcm_route_open (snd_pcm_t **pcmp, const char *name, snd_pcm_format_t sformat, int schannels, snd_pcm_route_ttable_entry_t *ttable, unsigned int tt_ssize, unsigned int tt_cused, unsigned int tt_sused, snd_pcm_t *slave, int close_slave) |
| Creates a new Route & Volume PCM.
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int | snd_pcm_route_determine_ttable (snd_config_t *tt, unsigned int *tt_csize, unsigned int *tt_ssize) |
| Determine route matrix sizes.
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int | snd_pcm_route_load_ttable (snd_config_t *tt, snd_pcm_route_ttable_entry_t *ttable, unsigned int tt_csize, unsigned int tt_ssize, unsigned int *tt_cused, unsigned int *tt_sused, int schannels) |
| Load route matrix.
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int | _snd_pcm_route_open (snd_pcm_t **pcmp, const char *name, snd_config_t *root, snd_config_t *conf, snd_pcm_stream_t stream, int mode) |
| Creates a new Route & Volume PCM.
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Detailed Description
PCM Route & Volume Plugin Interface.
- Author:
- Abramo Bagnara <abramo@alsa-project.org>
- Date:
- 2000-2001
Function Documentation
Creates a new Route & Volume PCM.
- Parameters:
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| pcmp | Returns created PCM handle - Parameters:
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| name | Name of PCM - Parameters:
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| root | Root configuration node - Parameters:
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| conf | Configuration node with Route & Volume PCM description - Parameters:
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| stream | Stream type - Parameters:
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| mode | Stream mode - Return values:
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| zero | on success otherwise a negative error code - Warning:
- Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future.
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int snd_pcm_route_determine_ttable |
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snd_config_t * |
tt, |
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unsigned int * |
tt_csize, |
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unsigned int * |
tt_ssize | |
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Determine route matrix sizes.
- Parameters:
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| tt | Configuration root describing route matrix - Parameters:
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| tt_csize | Returned client size in elements - Parameters:
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| tt_ssize | Returned slave size in elements - Return values:
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| zero | on success otherwise a negative error code |
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int snd_pcm_route_load_ttable |
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snd_config_t * |
tt, |
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snd_pcm_route_ttable_entry_t * |
ttable, |
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unsigned int |
tt_csize, |
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unsigned int |
tt_ssize, |
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unsigned int * |
tt_cused, |
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unsigned int * |
tt_sused, |
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int |
schannels | |
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Load route matrix.
- Parameters:
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| tt | Configuration root describing route matrix - Parameters:
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| ttable | Returned route matrix - Parameters:
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| tt_csize | Client size in elements - Parameters:
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| tt_ssize | Slave size in elements - Parameters:
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| tt_cused | Used client elements - Parameters:
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| tt_sused | Used slave elements - Parameters:
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| schannels | Slave channels - Return values:
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| zero | on success otherwise a negative error code |
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int snd_pcm_route_open |
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snd_pcm_t ** |
pcmp, |
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const char * |
name, |
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snd_pcm_format_t |
sformat, |
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int |
schannels, |
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snd_pcm_route_ttable_entry_t * |
ttable, |
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unsigned int |
tt_ssize, |
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unsigned int |
tt_cused, |
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unsigned int |
tt_sused, |
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snd_pcm_t * |
slave, |
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int |
close_slave | |
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Creates a new Route & Volume PCM.
- Parameters:
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| pcmp | Returns created PCM handle - Parameters:
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| name | Name of PCM - Parameters:
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| sformat | Slave format - Parameters:
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| schannels | Slave channels - Parameters:
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| ttable | Attenuation table - Parameters:
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| tt_ssize | Attenuation table - slave size - Parameters:
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| tt_cused | Attenuation table - client used count - Parameters:
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| tt_sused | Attenuation table - slave used count - Parameters:
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| slave | Slave PCM handle - Parameters:
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| close_slave | When set, the slave PCM handle is closed with copy PCM - Return values:
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| zero | on success otherwise a negative error code - Warning:
- Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future.
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