/* * argument structure for synthesizer operations
*/ struct snd_seq_oss_arg { /* given by OSS sequencer */ int app_index; /* application unique index */ int file_mode; /* file mode - see below */ int seq_mode; /* sequencer mode - see below */
/* following must be initialized in open callback */ struct snd_seq_addr addr; /* opened port address */ void *private_data; /* private data for lowlevel drivers */
/* note-on event passing mode: initially given by OSS seq, * but configurable by drivers - see below
*/ int event_passing;
};
/* * synthesizer operation callbacks
*/ struct snd_seq_oss_callback { struct module *owner; int (*open)(struct snd_seq_oss_arg *p, void *closure); int (*close)(struct snd_seq_oss_arg *p); int (*ioctl)(struct snd_seq_oss_arg *p, unsignedint cmd, unsignedlong arg); int (*load_patch)(struct snd_seq_oss_arg *p, int format, constchar __user *buf, int offs, int count); int (*reset)(struct snd_seq_oss_arg *p); int (*raw_event)(struct snd_seq_oss_arg *p, unsignedchar *data);
};
/* flag: event_passing */ #define SNDRV_SEQ_OSS_PROCESS_EVENTS 0 /* key == 255 is processed as velocity change */ #define SNDRV_SEQ_OSS_PASS_EVENTS 1 /* pass all events to callback */ #define SNDRV_SEQ_OSS_PROCESS_KEYPRESS 2 /* key >= 128 will be processed as key-pressure */
/* default control rate: fixed */ #define SNDRV_SEQ_OSS_CTRLRATE 100
/* default max queue length: configurable by module option */ #define SNDRV_SEQ_OSS_MAX_QLEN 1024
/* * data pointer to snd_seq_register_device
*/ struct snd_seq_oss_reg { int type; int subtype; int nvoices; struct snd_seq_oss_callback oper; void *private_data;
};
/* device id */ #define SNDRV_SEQ_DEV_ID_OSS "seq-oss"
#endif/* __SOUND_SEQ_OSS_H */
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