static int
sync_callback(jack_transport_state_t state, jack_position_t *position, void *notused)
{
assert(jack_client);
g_debug("SYNC_CALLBACK");
if (!use_transport) return TRUE;
int res = FALSE;
if (pthread_mutex_trylock(&mutex) == 0) {
if ((smf = smf_vol) != NULL) {
if (!be_quiet)
g_debug("Seeking to %f seconds.", nframes_to_seconds(position->frame));
res = loop_seek(smf, nframes_to_seconds(position->frame));
}
else {
res = TRUE;
}
pthread_mutex_unlock(&mutex);
}
ready_to_roll = res;
return res;
}
static int
stream_callback (const void *input_buffer, void *output_buffer, unsigned long frames_per_buffer, const PaStreamCallbackTimeInfo * time_info, PaStreamCallbackFlags status_flags, void *user_data)
{
float **buffers = (float **) output_buffer;
#ifdef _HAVE_RUBBERBAND_
static gboolean initialized = FALSE;
if (!initialized) {
rubberband_set_max_process_size(rubberband, frames_per_buffer);
initialized = TRUE;
}
#endif
size_t i;
for (i = 0; i < 2; ++i)
{
memset (buffers[i], 0, frames_per_buffer * sizeof (float));
}
if (!ready)
return paContinue;
#ifdef _HAVE_FLUIDSYNTH_
if (reset_audio)
{
fluidsynth_all_notes_off ();
reset_synth_channels ();
reset_audio = FALSE;
return paContinue;
}
unsigned char event_data[MAX_MESSAGE_LENGTH]; //needs to be long enough for variable length messages...
size_t event_length = MAX_MESSAGE_LENGTH;
double event_time;
double until_time = nframes_to_seconds (playback_frame + frames_per_buffer);
#ifdef _HAVE_RUBBERBAND_
gint available = rubberband_available(rubberband);
if((!rubberband_active) || (available < (gint)frames_per_buffer)) {
#endif
while (read_event_from_queue (AUDIO_BACKEND, event_data, &event_length, &event_time, until_time/slowdown))
{//g_print("%x %x %x\n", event_data[0], event_data[1], event_data[2] );
fluidsynth_feed_midi (event_data, event_length); //in fluid.c note fluidsynth api ues fluid_synth_xxx these naming conventions are a bit too similar
}
fluidsynth_render_audio (frames_per_buffer, buffers[0], buffers[1]); //in fluid.c calls fluid_synth_write_float()
// Now get any audio to mix - dump it in the left hand channel for now
event_length = frames_per_buffer;
read_event_from_mixer_queue (AUDIO_BACKEND, (void *) buffers[1], &event_length);
#ifdef _HAVE_RUBBERBAND_
}
//if there is stuff available use it and give buffers[] to rubber band to process
if(rubberband_active)
{
if(available < (gint)frames_per_buffer)
rubberband_process(rubberband, (const float * const*)buffers, frames_per_buffer, 0);
available = rubberband_available(rubberband);
if(available >= (gint)frames_per_buffer)
{
rubberband_retrieve(rubberband, buffers, frames_per_buffer);//re-use buffers[] as they are available...
write_samples_to_rubberband_queue (AUDIO_BACKEND, buffers[0], frames_per_buffer);
write_samples_to_rubberband_queue (AUDIO_BACKEND, buffers[1], frames_per_buffer);
available -= frames_per_buffer;
}
event_length = frames_per_buffer;
read_event_from_rubberband_queue (AUDIO_BACKEND, (unsigned char *) buffers[0], &event_length);
event_length = frames_per_buffer;
read_event_from_rubberband_queue (AUDIO_BACKEND, (unsigned char *) buffers[1], &event_length);
}
#endif //_HAVE_RUBBERBAND_
if (until_time < get_playuntil ())
{
#endif //_HAVE_FLUIDSYNTH_
playback_frame += frames_per_buffer;
update_playback_time (TIMEBASE_PRIO_AUDIO, nframes_to_seconds (playback_frame));
#ifdef _HAVE_FLUIDSYNTH_
}
#endif //_HAVE_FLUIDSYNTH_
// This is probably a bad idea to do heavy work in an audio callback
record_audio(buffers, frames_per_buffer);
return paContinue;
}
void
process_midi_input (jack_nframes_t nframes)
{
static int time_of_first_event = -1;
int /*read,*/ events, i, channel;
jack_midi_event_t event;
int last_frame_time = jack_last_frame_time(jack_client);
void * port_buffer = jack_port_get_buffer(input_port, nframes);
if (port_buffer == NULL)
{
warn_from_jack_thread_context
(
"jack_port_get_buffer failed, cannot receive anything."
);
return;
}
#ifdef JACK_MIDI_NEEDS_NFRAMES
events = jack_midi_get_event_count(port_buffer, nframes);
#else
events = jack_midi_get_event_count(port_buffer);
#endif
for (i = 0; i < events; ++i)
{
smf_event_t * smf_event;
#ifdef JACK_MIDI_NEEDS_NFRAMES
int read = jack_midi_event_get(&event, port_buffer, i, nframes);
#else
int read = jack_midi_event_get(&event, port_buffer, i);
#endif
if (read) {
warn_from_jack_thread_context("jack_midi_event_get failed, RECEIVED NOTE LOST.");
continue;
}
if (event.buffer[0] >= 0xF8) /* Ignore realtime messages. */
continue;
if (time_of_first_event == -1) /* First event received? */
time_of_first_event = last_frame_time + event.time;
smf_event = smf_event_new_from_pointer(event.buffer, event.size);
if (smf_event == NULL)
{
warn_from_jack_thread_context
(
"smf_event_from_pointer failed, RECEIVED NOTE LOST."
);
continue;
}
// assert(smf_event->midi_buffer_length >= 1);
channel = smf_event->midi_buffer[0] & 0x0F;
smf_track_add_event_seconds
(
tracks[channel], smf_event,
nframes_to_seconds
(
jack_last_frame_time(jack_client) + event.time - time_of_first_event
)
);
}
}