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mixer_plugin: use GError for error handling

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This commit is contained in:
Max Kellermann
2009-10-20 22:10:56 +02:00
parent 9cd2129eeb
commit 4e2fb3fb89
11 changed files with 203 additions and 85 deletions
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26
src/mixer_plugin.h
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@@ -27,6 +27,8 @@
#ifndef MPD_MIXER_PLUGIN_H
#define MPD_MIXER_PLUGIN_H
#include <glib.h>
#include <stdbool.h>
struct config_param;
@@ -35,8 +37,13 @@ struct mixer;
struct mixer_plugin {
/**
* Alocates and configures a mixer device.
*
* @param error_r location to store the error occuring, or
* NULL to ignore errors
* @return a mixer object, or NULL on error
*/
struct mixer *(*init)(const struct config_param *param);
struct mixer *(*init)(const struct config_param *param,
GError **error_r);
/**
* Finish and free mixer data
@@ -45,8 +52,12 @@ struct mixer_plugin {
/**
* Open mixer device
*
* @param error_r location to store the error occuring, or
* NULL to ignore errors
* @return true on success, false on error
*/
bool (*open)(struct mixer *data);
bool (*open)(struct mixer *data, GError **error_r);
/**
* Close mixer device
@@ -56,18 +67,23 @@ struct mixer_plugin {
/**
* Reads the current volume.
*
* @param error_r location to store the error occuring, or
* NULL to ignore errors
* @return the current volume (0..100 including) or -1 on
* error
*/
int (*get_volume)(struct mixer *mixer);
int (*get_volume)(struct mixer *mixer, GError **error_r);
/**
* Sets the volume.
*
* @param error_r location to store the error occuring, or
* NULL to ignore errors
* @param volume the new volume (0..100 including)
* @return true on success
* @return true on success, false on error
*/
bool (*set_volume)(struct mixer *mixer, unsigned volume);
bool (*set_volume)(struct mixer *mixer, unsigned volume,
GError **error_r);
/**
* If true, then the mixer is automatically opened, even if