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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include "midiin.h" |
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|
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MidiIn::MidiIn(AudioThread* pAudioThread) : Thread(true, 1, -1) { |
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this->seq_handle = NULL; |
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this->pAudioThread = pAudioThread; |
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memset(MIDIControllerTable, 0x00, 128); // set all controller values to zero |
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} |
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|
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MidiIn::~MidiIn() { |
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close_alsa_midi_seq(); |
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} |
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|
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int MidiIn::open_alsa_midi_seq(void) { |
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if (snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_INPUT, 0) < 0) { |
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fprintf(stderr, "Error opening ALSA sequencer.\n"); |
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exit(1); |
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} |
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this->AlsaID = snd_seq_client_id(seq_handle); |
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snd_seq_set_client_name(seq_handle, "LinuxSampler"); |
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if ((this->AlsaPort = snd_seq_create_simple_port(seq_handle, "LinuxSampler", |
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SND_SEQ_PORT_CAP_WRITE|SND_SEQ_PORT_CAP_SUBS_WRITE, |
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SND_SEQ_PORT_TYPE_APPLICATION)) < 0) { |
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fprintf(stderr, "Error creating sequencer port.\n"); |
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exit(1); |
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} |
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return 0; |
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} |
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|
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void MidiIn::close_alsa_midi_seq(void) { |
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} |
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|
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/** |
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* Makes a connection to another Alsa sequencer client, so that all MIDI |
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* events from e.g. a keyboard are always delivered to us. |
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* |
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* @param Client - Alsa sequencer client ID and port string to connect to |
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* (e.g. "64:0") |
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*/ |
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void MidiIn::SubscribeToClient(const char* Client) { |
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if (!this->seq_handle) { // if we haven't registered our seq client yet |
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int res = open_alsa_midi_seq(); |
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if (res < 0) { |
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fprintf(stderr,"Opening of MIDI in device failed, exiting.\n"); |
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exit(EXIT_FAILURE); |
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} |
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} |
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|
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snd_seq_addr_t sender, dest; |
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snd_seq_port_subscribe_t* subs; |
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int extClientID, extPortID; |
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|
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sscanf(Client, "%d:%d", &extClientID, &extPortID); |
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sender.client = (char) extClientID; |
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sender.port = (char) extPortID; |
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dest.client = (char) this->AlsaID; |
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dest.port = (char) this->AlsaPort; |
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snd_seq_port_subscribe_alloca(&subs); |
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snd_seq_port_subscribe_set_sender(subs, &sender); |
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snd_seq_port_subscribe_set_dest(subs, &dest); |
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snd_seq_port_subscribe_set_queue(subs, 1); |
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snd_seq_port_subscribe_set_time_update(subs, 1); |
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snd_seq_port_subscribe_set_time_real(subs, 1); |
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if (snd_seq_subscribe_port(this->seq_handle, subs) < 0) { |
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fprintf(stderr, "Unable to subscribe to client \'%s\' (%s)\n", Client, snd_strerror(errno)); |
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} |
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} |
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|
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int MidiIn::Main() { |
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if (!this->seq_handle) { // if we haven't registered our seq client yet |
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int res = open_alsa_midi_seq(); |
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if (res < 0) { |
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fprintf(stderr,"Opening of MIDI in device failed, exiting.\n"); |
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exit(EXIT_FAILURE); |
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} |
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} |
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|
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int npfd; |
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struct pollfd *pfd; |
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snd_seq_event_t *ev; |
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|
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npfd = snd_seq_poll_descriptors_count(seq_handle, POLLIN); |
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pfd = (struct pollfd *)alloca(npfd * sizeof(struct pollfd)); |
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snd_seq_poll_descriptors(seq_handle, pfd, npfd, POLLIN); |
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while (true) { |
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if (poll(pfd, npfd, 100000) > 0) { |
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do { |
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snd_seq_event_input(seq_handle, &ev); |
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switch (ev->type) { |
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case SND_SEQ_EVENT_CONTROLLER: |
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pAudioThread->SendControlChange(ev->data.control.channel, ev->data.control.param, ev->data.control.value); |
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break; |
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|
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case SND_SEQ_EVENT_PITCHBEND: |
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// fprintf(stderr, "Pitchbender event on Channel %2d: %5d \n", |
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// ev->data.control.channel, ev->data.control.value); |
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break; |
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|
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case SND_SEQ_EVENT_NOTEON: |
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if (ev->data.note.velocity != 0) { |
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pAudioThread->SendNoteOn(ev->data.note.note, ev->data.note.velocity); |
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} |
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else { |
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pAudioThread->SendNoteOff(ev->data.note.note, 0); |
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} |
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break; |
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|
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case SND_SEQ_EVENT_NOTEOFF: |
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pAudioThread->SendNoteOff(ev->data.note.note, ev->data.note.velocity); |
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break; |
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} |
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snd_seq_free_event(ev); |
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} while (snd_seq_event_input_pending(seq_handle, 0) > 0); |
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} |
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} |
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} |
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