From 6eabbee4348d0e2ca1b4140133ddc5e1fd2ed2f7 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Tue, 13 Oct 2015 02:06:58 +0200
Subject: first working version of client

---
 client/midi.c | 93 ++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 53 insertions(+), 40 deletions(-)

(limited to 'client/midi.c')

diff --git a/client/midi.c b/client/midi.c
index 25ec551..7075432 100644
--- a/client/midi.c
+++ b/client/midi.c
@@ -31,8 +31,16 @@
 
 #define NOTE_EN 0x00
 #define NOTE_DE 0x01
-u_int8_t done_data_en[] = { 0xB0, NOTE_EN, 0x01, 0xB0, NOTE_DE, 0x00 };
-u_int8_t done_data_de[] = { 0xB0, NOTE_EN, 0x00, 0xB0, NOTE_DE, 0x01 };
+u_int8_t led_cmd_en[] = { 0xB0, NOTE_EN, 0x01, 0xB0, NOTE_DE, 0x00 };
+u_int8_t led_cmd_de[] = { 0xB0, NOTE_EN, 0x00, 0xB0, NOTE_DE, 0x01 };
+
+static void free_cmd_entry(void* ptr)
+{
+  cmd_t* c = ptr;
+  assert(c);
+  free(c->buf_);
+  free(c);
+}
 
 int midi_init(midi_t* m, const char* device)
 {
@@ -42,8 +50,7 @@ int midi_init(midi_t* m, const char* device)
   m->output_ = NULL;
   memset(m->buf_, 0, sizeof(m->buf_));
   m->read_idx_ = 0;
-
-  slist_init(&(m->done_data_), free);
+  slist_init(&(m->cmds_), free_cmd_entry);
 
   int ret = snd_rawmidi_open(&(m->input_), &(m->output_), device, SND_RAWMIDI_NONBLOCK);
   if(ret < 0) {
@@ -54,6 +61,35 @@ int midi_init(midi_t* m, const char* device)
   return 0;
 }
 
+int midi_enqueue_cmd(midi_t* m, const char* lang)
+{
+  assert(m && lang);
+
+  int len;
+  const u_int8_t* src;
+  if(!strcmp(lang, "en")) {
+    len = sizeof(led_cmd_en);
+    src = led_cmd_en;
+  }
+  else if(!strcmp(lang, "de")) {
+    len = sizeof(led_cmd_de);
+    src = led_cmd_de;
+  }
+  else
+    return 0;
+
+  cmd_t* cmd = malloc(sizeof(cmd_t));
+  assert(cmd);
+  cmd->len_ = len;
+  assert((cmd->buf_ = malloc(cmd->len_)));
+  memcpy(cmd->buf_, src, cmd->len_);
+  cmd->write_idx_ = 0;
+
+  slist_add(&(m->cmds_), cmd);
+
+  return 0;
+}
+
 int midi_get_poll_fd_count(midi_t* m)
 {
   assert(m);
@@ -73,13 +109,7 @@ int midi_get_poll_fds(midi_t* m, struct pollfd *pfds, int 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) {
+  if(!slist_length(&(m->cmds_))) {
     int i;
     for(i = m->in_pfds_cnt_; i < npfds; ++i)
       pfds[i].events = 0;
@@ -87,33 +117,17 @@ int midi_get_poll_fds(midi_t* m, struct pollfd *pfds, int npfds)
   return (m->in_pfds_cnt_ + m->out_pfds_cnt_);
 }
 
-void midi_lang_switch_done(void* data)
-{
-  assert(data);
-  midi_done_data_t* d = data;
-  d->active_ = 1;
-}
-
-static int midi_enqueue_lang_switch(midi_t* m, osc_t* o, const char* lang, const u_int8_t* buf, int len)
+static int midi_enqueue_lang_switch(midi_t* m, osc_t* o, const char* lang)
 {
-  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 osc_switch_lang(o, lang, &midi_lang_switch_done, done_data);
+  return osc_switch_lang(o, lang);
 }
 
 static int midi_handle_note_on(midi_t* m, osc_t* o)
 {
   int ret = 0;
   switch(m->buf_[1]) {
-  case NOTE_EN: ret = midi_enqueue_lang_switch(m, o,"en", done_data_en, sizeof(done_data_en)); break;
-  case NOTE_DE: ret = midi_enqueue_lang_switch(m, o, "de", done_data_de, sizeof(done_data_de)); break;
+  case NOTE_EN: ret = midi_enqueue_lang_switch(m, o,"en"); break;
+  case NOTE_DE: ret = midi_enqueue_lang_switch(m, o, "de"); break;
   default: printf("ignoring unknown note\n"); break;
   }
   return ret;
@@ -189,26 +203,25 @@ static int midi_handle_out_revents(midi_t* m, struct pollfd *pfds, int npfds)
   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_);
+  assert(m->cmds_.first_);
+  cmd_t* cmd = (cmd_t*)(m->cmds_.first_->data_);
+  assert(cmd);
+  assert(cmd->buf_);
 
-  int ret = snd_rawmidi_write(m->output_, &(done_data->buf_[done_data->write_idx_]), done_data->len_ - done_data->write_idx_);
+  int ret = snd_rawmidi_write(m->output_, &(cmd->buf_[cmd->write_idx_]), cmd->len_ - cmd->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_) {
+  cmd->write_idx_ += ret;
+  if(cmd->write_idx_ >= cmd->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);
+    slist_remove(&(m->cmds_), cmd);
   }
 
   return 0;
-- 
cgit v1.2.3