PCM Hook Interface.
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| int | snd_pcm_hooks_open (snd_pcm_t **pcmp, const char *name, snd_pcm_t *slave, int close_slave) |
| | Creates a new hooks PCM.
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| int | _snd_pcm_hooks_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 hooks PCM.
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| snd_pcm_t * | snd_pcm_hook_get_pcm (snd_pcm_hook_t *hook) |
| | Get PCM handle for a PCM hook.
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| void * | snd_pcm_hook_get_private (snd_pcm_hook_t *hook) |
| | Get callback function private data for a PCM hook.
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| void | snd_pcm_hook_set_private (snd_pcm_hook_t *hook, void *private_data) |
| | Set callback function private data for a PCM hook.
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| int | snd_pcm_hook_add (snd_pcm_hook_t **hookp, snd_pcm_t *pcm, snd_pcm_hook_type_t type, snd_pcm_hook_func_t func, void *private_data) |
| | Add a PCM hook at end of hooks chain.
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| int | snd_pcm_hook_remove (snd_pcm_hook_t *hook) |
| | Remove a PCM hook.
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| int | _snd_pcm_hook_ctl_elems_install (snd_pcm_t *pcm, snd_config_t *conf) |
| | Install CTL settings using hardware associated with PCM handle.
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◆ _snd_pcm_hook_ctl_elems_install()
| int _snd_pcm_hook_ctl_elems_install |
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snd_pcm_t * | pcm, |
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snd_config_t * | conf ) |
Install CTL settings using hardware associated with PCM handle.
- Parameters
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| pcm | PCM handle |
| conf | Configuration node with CTL settings |
- Returns
- zero on success otherwise a negative error code
◆ _snd_pcm_hooks_open()
| int _snd_pcm_hooks_open |
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snd_pcm_t ** | pcmp, |
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const char * | name, |
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snd_config_t * | root, |
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snd_config_t * | conf, |
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snd_pcm_stream_t | stream, |
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int | mode ) |
Creates a new hooks PCM.
- Parameters
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| pcmp | Returns created PCM handle |
| name | Name of PCM |
| root | Root configuration node |
| conf | Configuration node with hooks PCM description |
| stream | PCM Stream |
| mode | PCM 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.
◆ snd_pcm_hook_add()
| int snd_pcm_hook_add |
( |
snd_pcm_hook_t ** | hookp, |
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snd_pcm_t * | pcm, |
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snd_pcm_hook_type_t | type, |
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snd_pcm_hook_func_t | func, |
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void * | private_data ) |
Add a PCM hook at end of hooks chain.
- Parameters
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| hookp | Returned PCM hook handle |
| pcm | PCM handle |
| type | PCM hook type |
| func | PCM hook callback function |
| private_data | PCM hook private data |
- Returns
- 0 on success otherwise a negative error code
Warning: an hook callback function cannot remove an hook of the same type different from itself
◆ snd_pcm_hook_get_pcm()
| snd_pcm_t * snd_pcm_hook_get_pcm |
( |
snd_pcm_hook_t * | hook | ) |
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Get PCM handle for a PCM hook.
- Parameters
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- Returns
- PCM handle
◆ snd_pcm_hook_get_private()
| void * snd_pcm_hook_get_private |
( |
snd_pcm_hook_t * | hook | ) |
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Get callback function private data for a PCM hook.
- Parameters
-
- Returns
- callback function private data
◆ snd_pcm_hook_remove()
| int snd_pcm_hook_remove |
( |
snd_pcm_hook_t * | hook | ) |
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Remove a PCM hook.
- Parameters
-
- Returns
- 0 on success otherwise a negative error code
Warning: an hook callback cannot remove an hook of the same type different from itself
◆ snd_pcm_hook_set_private()
| void snd_pcm_hook_set_private |
( |
snd_pcm_hook_t * | hook, |
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void * | private_data ) |
Set callback function private data for a PCM hook.
- Parameters
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| hook | PCM hook handle |
| private_data | The private data value |
◆ snd_pcm_hooks_open()
| int snd_pcm_hooks_open |
( |
snd_pcm_t ** | pcmp, |
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const char * | name, |
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snd_pcm_t * | slave, |
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int | close_slave ) |
Creates a new hooks PCM.
- Parameters
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| pcmp | Returns created PCM handle |
| name | Name of PCM |
| slave | Slave PCM |
| close_slave | If set, slave PCM handle is closed when hooks PCM is closed |
- 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.