diff options
Diffstat (limited to 'apps/midi.c')
| -rw-r--r-- | apps/midi.c | 122 |
1 files changed, 97 insertions, 25 deletions
diff --git a/apps/midi.c b/apps/midi.c index 861c95e..5d5fb1a 100644 --- a/apps/midi.c +++ b/apps/midi.c @@ -31,11 +31,7 @@ #define NOTE_EN 0x00 #define NOTE_DE 0x01 - -#define EN_IDX 0 u_int8_t done_data_en[] = { 0xB0, NOTE_EN, 0x01, 0xB0, NOTE_DE, 0x00 }; - -#define DE_IDX 1 u_int8_t done_data_de[] = { 0xB0, NOTE_EN, 0x00, 0xB0, NOTE_DE, 0x01 }; int midi_init(midi_t* m, const char* device) @@ -43,18 +39,13 @@ int midi_init(midi_t* m, const char* device) assert(m != NULL); m->input_ = NULL; + m->output_ = NULL; memset(m->buf_, 0, sizeof(m->buf_)); m->read_idx_ = 0; - m->done_data_[EN_IDX].self_ = m; - m->done_data_[EN_IDX].buf_ = done_data_en; - m->done_data_[EN_IDX].len_ = sizeof(done_data_en); - - m->done_data_[DE_IDX].self_ = m; - m->done_data_[DE_IDX].buf_ = done_data_de; - m->done_data_[DE_IDX].len_ = sizeof(done_data_de); + slist_init(&(m->done_data_), free); - int ret = snd_rawmidi_open(&(m->input_), NULL, device, SND_RAWMIDI_NONBLOCK); + int ret = snd_rawmidi_open(&(m->input_), &(m->output_), device, SND_RAWMIDI_NONBLOCK); if(ret < 0) { error(0, 0, "MIDI: cannot open port '%s': %s", device, snd_strerror(ret)); return ret; @@ -65,34 +56,64 @@ int midi_init(midi_t* m, const char* device) int midi_get_poll_fd_count(midi_t* m) { - return snd_rawmidi_poll_descriptors_count(m->input_); + assert(m); + + m->in_pfds_cnt_ = snd_rawmidi_poll_descriptors_count(m->input_); + assert(m->in_pfds_cnt_ > 0); + m->out_pfds_cnt_ = snd_rawmidi_poll_descriptors_count(m->output_); + assert(m->out_pfds_cnt_ > 0); + + return (m->in_pfds_cnt_ + m->out_pfds_cnt_); } int midi_get_poll_fds(midi_t* m, struct pollfd *pfds, int npfds) { - return snd_rawmidi_poll_descriptors(m->input_, pfds, npfds); + assert(m && pfds && npfds); + + snd_rawmidi_poll_descriptors(m->input_, pfds, m->in_pfds_cnt_); + snd_rawmidi_poll_descriptors(m->output_, &(pfds[m->in_pfds_cnt_]), npfds - m->in_pfds_cnt_); + + int pending_data = 0; + if(m->done_data_.first_) { + midi_done_data_t* d = (midi_done_data_t*)(m->done_data_.first_->data_); + if(d->active_) + pending_data = 1; + } + if(!pending_data) { + int i; + for(i = m->in_pfds_cnt_; i < npfds; ++i) + pfds[i].events = 0; + } + return (m->in_pfds_cnt_ + m->out_pfds_cnt_); } -void midi_switch_lang_done(void* data) +void midi_lang_switch_done(void* data) { assert(data); midi_done_data_t* d = data; - assert(d->self_); + d->active_ = 1; +} - int i; - printf("MIDI done: "); - for(i = 0; i < d->len_; ++i) { - printf("0x%02X%s", d->buf_[i], (i && !((i+1) % 3)) ? ", " : " "); - } - printf("\n"); +static int midi_enqueue_lang_switch(midi_t* m, mixer_t* x, const char* lang, const u_int8_t* buf, int len) +{ + midi_done_data_t* done_data = malloc(sizeof(midi_done_data_t)); + assert(done_data); + done_data->self_ = m; + done_data->active_ = 0; + done_data->buf_ = buf; + done_data->len_ = len; + done_data->write_idx_ = 0; + assert(slist_add(&(m->done_data_), done_data)); + + return mixer_switch_lang(x, lang, &midi_lang_switch_done, done_data); } static int midi_handle_note_on(midi_t* m, mixer_t* x) { int ret = 0; switch(m->buf_[1]) { - case NOTE_EN: ret = mixer_switch_lang(x, "en", &midi_switch_lang_done, &(m->done_data_[EN_IDX])); break; - case NOTE_DE: ret = mixer_switch_lang(x, "de", &midi_switch_lang_done, &(m->done_data_[DE_IDX])); break; + case NOTE_EN: ret = midi_enqueue_lang_switch(m, x, "en", done_data_en, sizeof(done_data_en)); break; + case NOTE_DE: ret = midi_enqueue_lang_switch(m, x, "de", done_data_de, sizeof(done_data_de)); break; default: printf("ignoring unknown note\n"); break; } return ret; @@ -120,7 +141,7 @@ static int midi_handle_message(midi_t* m, mixer_t* x) return ret; } -int midi_handle_revents(midi_t* m, struct pollfd *pfds, int npfds, mixer_t* x) +static int midi_handle_in_revents(midi_t* m, struct pollfd *pfds, int npfds, mixer_t* x) { int err; unsigned short revents; @@ -152,3 +173,54 @@ int midi_handle_revents(midi_t* m, struct pollfd *pfds, int npfds, mixer_t* x) return 0; } + +static int midi_handle_out_revents(midi_t* m, struct pollfd *pfds, int npfds) +{ + int err; + unsigned short revents; + if((err = snd_rawmidi_poll_descriptors_revents(m->output_, pfds, npfds, &revents)) < 0) { + error(0, 0, "MIDI: cannot get poll events: %s", snd_strerror(errno)); + return -1; + } + if(pfds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) { + error(0, 0, "MIDI: got POLLERR, POLLHUP or POLLNVAL"); + return -1; + } + if(!(revents & POLLOUT)) + return 0; + + assert(m->done_data_.first_); + midi_done_data_t* done_data = (midi_done_data_t*)(m->done_data_.first_->data_); + assert(done_data); + assert(done_data->active_); + assert(done_data->buf_); + + int ret = snd_rawmidi_write(m->output_, &(done_data->buf_[done_data->write_idx_]), done_data->len_ - done_data->write_idx_); + if(ret == -EAGAIN) + return 0; + if(ret < 0) { + error(0, 0, "MIDI: cannot write to port: %s", snd_strerror(ret)); + return -1; + } + done_data->write_idx_ += ret; + if(done_data->write_idx_ >= done_data->len_) { + if((err = snd_rawmidi_drain(m->output_)) < 0) { + error(0, 0, "MIDI: cannot drain output: %s", snd_strerror(err)); + return -1; + } + slist_remove(&(m->done_data_), done_data); + } + + return 0; +} + +int midi_handle_revents(midi_t* m, struct pollfd *pfds, int npfds, mixer_t* x) +{ + assert(m && x && pfds); + + int ret = midi_handle_in_revents(m, pfds, m->in_pfds_cnt_, x); + if(ret) + return ret; + + return midi_handle_out_revents(m, &(pfds[m->in_pfds_cnt_]), m->out_pfds_cnt_); +} |