64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
#include <alsa/asoundlib.h>
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#include "alsa_wrapper.h"
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int new_client(char* client_name) {
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int status;
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status = snd_seq_open(&seq_handle, "hw", SND_SEQ_OPEN_OUTPUT, 0);
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if (status < 0) {
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return 1<<16|status;
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}
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seq_client = snd_seq_client_id(seq_handle);
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if (seq_client < 0) {
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return 2<<16|status;
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}
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status = snd_seq_set_client_name(seq_handle, client_name);
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if (status < 0) {
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return 3<<16|status;
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}
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// Success
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return 0;
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}
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int new_port(char* port_name) {
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seq_port = snd_seq_create_simple_port(seq_handle, port_name,
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SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ,
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SND_SEQ_PORT_TYPE_MIDI_GENERIC|SND_SEQ_PORT_TYPE_APPLICATION);
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if (seq_port < 0) {
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return seq_port;
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}
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// Success
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return 0;
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}
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int send_data(char* data, int length) {
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int status;
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snd_midi_event_t* midiParser;
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status = snd_midi_event_new(length, &midiParser);
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if (status < 0) {
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return 1<<16|status;
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}
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snd_seq_event_t* ev;
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snd_seq_ev_clear(ev);
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status = snd_midi_event_encode(midiParser, data, length, ev);
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if (status < 0) {
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return 2<<16|status;
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}
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snd_seq_ev_set_direct(ev);
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snd_seq_ev_set_source(ev, seq_port);
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snd_seq_ev_set_dest(ev, SND_SEQ_ADDRESS_SUBSCRIBERS, 0);
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status = snd_seq_event_output_direct(seq_handle, ev);
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if (status < 0) {
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return 3<<16|status;
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}
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return 0;
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} |