Per-channel ALL_SOUND_OFF when seeking/stopping player

src/midi/fluid_midi.c

@@ -1604,6 +1604,10 @@ fluid_track_send_events(fluid_track_t *track,
             if(player->playback_callback)
             {
                 player->playback_callback(player->playback_userdata, event);
+                if(event->type == NOTE_ON && !player->channel_isplaying[event->channel])
+                {
+                    player->channel_isplaying[event->channel] = 1;
+                }
             }
         }
 
@@ -1660,6 +1664,11 @@ new_fluid_player(fluid_synth_t *synth)
         player->track[i] = NULL;
     }
 
+    for(i = 0; i < synth->midi_channels; i++)
+    {
+        player->channel_isplaying[i] = 0;
+    }
+
     player->synth = synth;
     player->system_timer = NULL;
     player->sample_timer = NULL;
@@ -2080,18 +2089,30 @@ fluid_player_callback(void *data, unsigned int msec)
     int i;
     int loadnextfile;
     int status = FLUID_PLAYER_DONE;
+    fluid_midi_event_t mute_event;
     fluid_player_t *player;
     fluid_synth_t *synth;
     player = (fluid_player_t *) data;
     synth = player->synth;
 
     loadnextfile = player->currentfile == NULL ? 1 : 0;
+
+    fluid_midi_event_set_type(&mute_event, CONTROL_CHANGE);
+    mute_event.param1 = ALL_SOUND_OFF;
+    mute_event.param2 = 1;
 
     if(fluid_player_get_status(player) != FLUID_PLAYER_PLAYING)
     {
         if(fluid_atomic_int_get(&player->stopping))
         {
-            fluid_synth_all_notes_off(synth, -1);
+			for(i = 0; i < synth->midi_channels; i++)
+			{
+				if(player->channel_isplaying[i])
+				{
+					fluid_midi_event_set_channel(&mute_event, i);
+					player->playback_callback(player->playback_userdata, &mute_event);
+				}
+			}
             fluid_atomic_int_set(&player->stopping, 0);
         }
         return 1;
@@ -2121,7 +2142,14 @@ fluid_player_callback(void *data, unsigned int msec)
         seek_ticks = fluid_atomic_int_get(&player->seek_ticks);
         if(seek_ticks >= 0)
         {
-            fluid_synth_all_sounds_off(synth, -1); /* avoid hanging notes */
+			for(i = 0; i < synth->midi_channels; i++)
+			{
+				if(player->channel_isplaying[i])
+				{
+					fluid_midi_event_set_channel(&mute_event, i);
+					player->playback_callback(player->playback_userdata, &mute_event);
+				}
+			}
         }
 
         for(i = 0; i < player->ntracks; i++)

src/midi/fluid_midi.h

@@ -39,6 +39,7 @@ fluid_midi_event_t *fluid_midi_parser_parse(fluid_midi_parser_t *parser, unsigne
 
 
 #define MAX_NUMBER_OF_TRACKS 128
+#define MAX_NUMBER_OF_CHANNELS 256
 
 enum fluid_midi_event_type
 {
@@ -325,6 +326,8 @@ struct _fluid_player_t
     void *playback_userdata; /* pointer to user-defined data passed to playback_callback function */
     handle_midi_tick_func_t tick_callback; /* function fired on each tick change */
     void *tick_userdata; /* pointer to user-defined data passed to tick_callback function */
+
+    int channel_isplaying[MAX_NUMBER_OF_CHANNELS]; /* flags indicating channels on which notes have played */
 };
 
 void fluid_player_settings(fluid_settings_t *settings);