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Fix div by zero in fluid_player_set_tempo()

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derselbst 2022-06-11 17:45:50 +02:00 committed by Tom M
parent 41f00ec8cb
commit 58ec0d8eb7
1 changed files with 10 additions and 0 deletions
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10
src/midi/fluid_midi.c
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@ -2336,6 +2336,12 @@ static void fluid_player_update_tempo(fluid_player_t *player)
int tempo; /* tempo in micro seconds by quarter note */ int tempo; /* tempo in micro seconds by quarter note */
float deltatime; float deltatime;
/* do nothing if the division is still unknown to avoid a div by zero */
if(player->division == 0)
{
return;
}
if(fluid_atomic_int_get(&player->sync_mode)) if(fluid_atomic_int_get(&player->sync_mode))
{ {
/* take internal tempo from MIDI file */ /* take internal tempo from MIDI file */
@ -2400,6 +2406,10 @@ static void fluid_player_update_tempo(fluid_player_t *player)
* #FLUID_PLAYER_TEMPO_INTERNAL will set the player to follow this internal * #FLUID_PLAYER_TEMPO_INTERNAL will set the player to follow this internal
* tempo. * tempo.
* *
* @warning If the function is called when no MIDI file is loaded or currently playing, it
* would have caused a division by zero in fluidsynth 2.2.7 and earlier. Starting with 2.2.8, the
* new tempo change will be stashed and applied later.
*
* @return #FLUID_OK if success or #FLUID_FAILED otherwise (incorrect parameters). * @return #FLUID_OK if success or #FLUID_FAILED otherwise (incorrect parameters).
* @since 2.2.0 * @since 2.2.0
*/ */