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https://gitee.com/openharmony/third_party_alsa-lib
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43041cbe78
- snd_seq_event_output_buffer() Outputs an event on buffer without flushing to sequencer. Useful for non-blocking mode write. - snd_seq_event_output_direct() Outputs an event directly to sequencer without using buffer. Thus the event can be passed even if output buffer is full. - snd_seq_input_buffer_size(), snd_seq_output_buffer_size() Returns the size of input/output buffers - snd_seq_resize_input_buffer(), snd_seq_resize_output_buffer() Changes the size of input/output buffers
92 lines
5.0 KiB
C
92 lines
5.0 KiB
C
/****************************************************************************
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* *
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* seq.h *
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* Sequencer *
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* *
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****************************************************************************/
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#define SND_SEQ_OPEN_OUT (O_WRONLY)
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#define SND_SEQ_OPEN_IN (O_RDONLY)
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#define SND_SEQ_OPEN (O_RDWR)
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct snd_seq snd_seq_t;
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int snd_seq_open(snd_seq_t **handle, int mode);
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int snd_seq_close(snd_seq_t *handle);
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int snd_seq_file_descriptor(snd_seq_t *handle);
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int snd_seq_block_mode(snd_seq_t *handle, int enable);
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int snd_seq_client_id(snd_seq_t *handle);
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int snd_seq_output_buffer_size(snd_seq_t *handle);
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int snd_seq_input_buffer_size(snd_seq_t *handle);
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int snd_seq_resize_output_buffer(snd_seq_t *handle, int size);
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int snd_seq_resize_input_buffer(snd_seq_t *handle, int size);
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int snd_seq_system_info(snd_seq_t *handle, snd_seq_system_info_t *info);
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int snd_seq_get_client_info(snd_seq_t *handle, snd_seq_client_info_t *info);
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int snd_seq_get_any_client_info(snd_seq_t *handle, int client, snd_seq_client_info_t *info);
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int snd_seq_set_client_info(snd_seq_t *handle, snd_seq_client_info_t *info);
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int snd_seq_create_port(snd_seq_t *handle, snd_seq_port_info_t *info);
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int snd_seq_delete_port(snd_seq_t *handle, snd_seq_port_info_t *info);
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int snd_seq_get_port_info(snd_seq_t *handle, int port, snd_seq_port_info_t *info);
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int snd_seq_get_any_port_info(snd_seq_t *handle, int client, int port, snd_seq_port_info_t *info);
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int snd_seq_set_port_info(snd_seq_t *handle, int port, snd_seq_port_info_t *info);
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int snd_seq_get_port_subscription(snd_seq_t *handle, snd_seq_port_subscribe_t *sub);
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int snd_seq_subscribe_port(snd_seq_t *handle, snd_seq_port_subscribe_t *sub);
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int snd_seq_unsubscribe_port(snd_seq_t *handle, snd_seq_port_subscribe_t *sub);
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int snd_seq_query_port_subscribers(snd_seq_t *seq, snd_seq_query_subs_t * subs);
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int snd_seq_get_queue_status(snd_seq_t *handle, int q, snd_seq_queue_status_t *status);
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int snd_seq_get_queue_tempo(snd_seq_t *handle, int q, snd_seq_queue_tempo_t *tempo);
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int snd_seq_set_queue_tempo(snd_seq_t *handle, int q, snd_seq_queue_tempo_t *tempo);
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int snd_seq_get_queue_owner(snd_seq_t *handle, int q, snd_seq_queue_owner_t *owner);
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int snd_seq_set_queue_owner(snd_seq_t *handle, int q, snd_seq_queue_owner_t *owner);
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int snd_seq_get_queue_timer(snd_seq_t *handle, int q, snd_seq_queue_timer_t *timer);
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int snd_seq_set_queue_timer(snd_seq_t *handle, int q, snd_seq_queue_timer_t *timer);
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#ifdef use_seqsync
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int snd_seq_get_queue_sync(snd_seq_t *handle, int q, snd_seq_queue_sync_t *sync);
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int snd_seq_set_queue_sync(snd_seq_t *handle, int q, snd_seq_queue_sync_t *sync);
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#endif
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int snd_seq_get_queue_client(snd_seq_t *handle, int q, snd_seq_queue_client_t *queue);
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int snd_seq_set_queue_client(snd_seq_t *handle, int q, snd_seq_queue_client_t *queue);
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int snd_seq_alloc_named_queue(snd_seq_t *seq, char *name);
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int snd_seq_alloc_queue(snd_seq_t *handle);
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int snd_seq_free_queue(snd_seq_t *handle, int q);
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int snd_seq_get_queue_info(snd_seq_t *seq, int q, snd_seq_queue_info_t *info);
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int snd_seq_set_queue_info(snd_seq_t *seq, int q, snd_seq_queue_info_t *info);
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int snd_seq_get_named_queue(snd_seq_t *seq, char *name);
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int snd_seq_get_client_pool(snd_seq_t *handle, snd_seq_client_pool_t * info);
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int snd_seq_set_client_pool(snd_seq_t *handle, snd_seq_client_pool_t * info);
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int snd_seq_query_next_client(snd_seq_t *handle, snd_seq_client_info_t * info);
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int snd_seq_query_next_port(snd_seq_t *handle, snd_seq_port_info_t * info);
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/* event routines */
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snd_seq_event_t *snd_seq_create_event(void);
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int snd_seq_free_event(snd_seq_event_t *ev);
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int snd_seq_event_length(snd_seq_event_t *ev);
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int snd_seq_event_output(snd_seq_t *handle, snd_seq_event_t *ev);
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int snd_seq_event_output(snd_seq_t *handle, snd_seq_event_t *ev);
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int snd_seq_event_output_buffer(snd_seq_t *handle, snd_seq_event_t *ev);
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int snd_seq_event_output_direct(snd_seq_t *handle, snd_seq_event_t *ev);
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int snd_seq_event_input(snd_seq_t *handle, snd_seq_event_t **ev);
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int snd_seq_event_input_pending(snd_seq_t *seq, int fetch_sequencer);
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int snd_seq_event_input_selective(snd_seq_t *seq, snd_seq_event_t **ev, int type, int blocking);
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int snd_seq_flush_output(snd_seq_t *handle);
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int snd_seq_event_output_pending(snd_seq_t *seq);
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int snd_seq_extract_output(snd_seq_t *handle, snd_seq_event_t **ev);
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int snd_seq_drain_output(snd_seq_t *handle);
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int snd_seq_drain_output_buffer(snd_seq_t *handle);
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int snd_seq_drain_input(snd_seq_t *handle);
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int snd_seq_drain_input_buffer(snd_seq_t *handle);
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int snd_seq_remove_events(snd_seq_t *handle, snd_seq_remove_events_t *info);
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/* misc */
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void snd_seq_set_bit(int nr, void *array);
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int snd_seq_change_bit(int nr, void *array);
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int snd_seq_get_bit(int nr, void *array);
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#ifdef __cplusplus
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}
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#endif
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