diff options
Diffstat (limited to 'src/i_oplmusic.c')
| -rw-r--r-- | src/i_oplmusic.c | 158 |
1 files changed, 140 insertions, 18 deletions
diff --git a/src/i_oplmusic.c b/src/i_oplmusic.c index a5910056..2df361e5 100644 --- a/src/i_oplmusic.c +++ b/src/i_oplmusic.c @@ -143,6 +143,9 @@ struct opl_voice_s // The current volume (register value) that has been set for this channel. unsigned int reg_volume; + // Priority. + unsigned int priority; + // Next in linked list; a voice is always either in the // free list or the allocated list. opl_voice_t *next; @@ -294,6 +297,7 @@ static const unsigned int volume_mapping_table[] = { 124, 124, 125, 125, 126, 126, 127, 127 }; +opl_driver_ver_t opl_drv_ver = opl_v_new; static boolean music_initialized = false; //static boolean musicpaused = false; @@ -311,6 +315,7 @@ static char (*percussion_names)[32]; static opl_voice_t voices[OPL_NUM_VOICES]; static opl_voice_t *voice_free_list; static opl_voice_t *voice_alloced_list; +static int voice_alloced_num; // Track data for playing tracks: @@ -391,6 +396,8 @@ static opl_voice_t *GetFreeVoice(void) *rover = result; result->next = NULL; + voice_alloced_num++; + return result; } @@ -410,6 +417,7 @@ static void RemoveVoiceFromAllocedList(opl_voice_t *voice) { *rover = voice->next; voice->next = NULL; + voice_alloced_num--; break; } @@ -419,13 +427,20 @@ static void RemoveVoiceFromAllocedList(opl_voice_t *voice) // Release a voice back to the freelist. +static void VoiceKeyOff(opl_voice_t *voice); + static void ReleaseVoice(opl_voice_t *voice) { opl_voice_t **rover; + opl_voice_t *next; + boolean doublev; voice->channel = NULL; voice->note = 0; + doublev = voice->current_instr_voice != 0; + next = voice->next; + // Remove from alloced list. RemoveVoiceFromAllocedList(voice); @@ -441,6 +456,12 @@ static void ReleaseVoice(opl_voice_t *voice) *rover = voice; voice->next = NULL; + + if (next != NULL && doublev && opl_drv_ver == opl_v_old) + { + VoiceKeyOff(next); + ReleaseVoice(next); + } } // Load data to the specified operator @@ -511,6 +532,11 @@ static void SetVoiceInstrument(opl_voice_t *voice, // Hack to force a volume update. voice->reg_volume = 999; + + // Calculate voice priority. + + voice->priority = 0x0f - (data->carrier.attack >> 4) + + 0x0f - (data->carrier.sustain & 0x0f); } static void SetVoiceVolume(opl_voice_t *voice, unsigned int volume) @@ -638,8 +664,9 @@ static opl_channel_data_t *TrackChannelForEvent(opl_track_data_t *track, static void KeyOffEvent(opl_track_data_t *track, midi_event_t *event) { opl_channel_data_t *channel; + opl_voice_t *rover; + opl_voice_t *prev; unsigned int key; - unsigned int i; /* printf("note off: channel %i, %i, %i\n", @@ -654,15 +681,31 @@ static void KeyOffEvent(opl_track_data_t *track, midi_event_t *event) // Turn off voices being used to play this key. // If it is a double voice instrument there will be two. - for (i = 0; i < OPL_NUM_VOICES; ++i) + rover = voice_alloced_list; + prev = NULL; + + while (rover!=NULL) { - if (voices[i].channel == channel && voices[i].key == key) + if (rover->channel == channel && rover->key == key) { - VoiceKeyOff(&voices[i]); + VoiceKeyOff(rover); // Finished with this voice now. - ReleaseVoice(&voices[i]); + ReleaseVoice(rover); + if (prev == NULL) + { + rover = voice_alloced_list; + } + else + { + rover = prev->next; + } + } + else + { + prev = rover; + rover = rover->next; } } } @@ -701,6 +744,39 @@ static void ReplaceExistingVoice(void) ReleaseVoice(result); } +static void ReplaceExistingVoiceOld(opl_channel_data_t *channel) +{ + opl_voice_t *rover; + opl_voice_t *result; + opl_voice_t *roverend; + int i; + int priority; + + result = voice_alloced_list; + + roverend = voice_alloced_list; + + for (i = 0; i < voice_alloced_num - 3; i++) + { + roverend = roverend->next; + } + + priority = 0x8000; + + for (rover = voice_alloced_list; rover != roverend; rover = rover->next) + { + if (rover->priority < priority + && rover->channel >= channel) + { + priority = rover->priority; + result = rover; + } + } + + VoiceKeyOff(result); + ReleaseVoice(result); +} + static unsigned int FrequencyForVoice(opl_voice_t *voice) { @@ -854,6 +930,7 @@ static void KeyOnEvent(opl_track_data_t *track, midi_event_t *event) genmidi_instr_t *instrument; opl_channel_data_t *channel; unsigned int note, key, volume; + boolean doublev; /* printf("note on: channel %i, %i, %i\n", @@ -896,20 +973,45 @@ static void KeyOnEvent(opl_track_data_t *track, midi_event_t *event) { instrument = channel->instrument; } + doublev = (SHORT(instrument->flags) & GENMIDI_FLAG_2VOICE) != 0; - if (voice_free_list == NULL) + if (opl_drv_ver == opl_v_old) { - ReplaceExistingVoice(); - } + if (voice_alloced_num == OPL_NUM_VOICES) + { + ReplaceExistingVoiceOld(channel); + } + if (voice_alloced_num == OPL_NUM_VOICES - 1 && doublev) + { + ReplaceExistingVoiceOld(channel); + } - // Find and program a voice for this instrument. If this - // is a double voice instrument, we must do this twice. + // Find and program a voice for this instrument. If this + // is a double voice instrument, we must do this twice. - VoiceKeyOn(channel, instrument, 0, note, key, volume); + if (doublev) + { + VoiceKeyOn(channel, instrument, 1, note, key, volume); + } - if ((SHORT(instrument->flags) & GENMIDI_FLAG_2VOICE) != 0) + VoiceKeyOn(channel, instrument, 0, note, key, volume); + } + else { - VoiceKeyOn(channel, instrument, 1, note, key, volume); + if (voice_free_list == NULL) + { + ReplaceExistingVoice(); + } + + // Find and program a voice for this instrument. If this + // is a double voice instrument, we must do this twice. + + VoiceKeyOn(channel, instrument, 0, note, key, volume); + + if (doublev) + { + VoiceKeyOn(channel, instrument, 1, note, key, volume); + } } } @@ -948,14 +1050,34 @@ static void SetChannelVolume(opl_channel_data_t *channel, unsigned int volume) // Handler for the MIDI_CONTROLLER_ALL_NOTES_OFF channel event. static void AllNotesOff(opl_channel_data_t *channel, unsigned int param) { - unsigned int i; + opl_voice_t *rover; + opl_voice_t *prev; - for (i = 0; i < OPL_NUM_VOICES; ++i) + rover = voice_alloced_list; + prev = NULL; + + while (rover!=NULL) { - if (voices[i].channel == channel) + if (rover->channel == channel) { - VoiceKeyOff(&voices[i]); - ReleaseVoice(&voices[i]); + VoiceKeyOff(rover); + + // Finished with this voice now. + + ReleaseVoice(rover); + if (prev == NULL) + { + rover = voice_alloced_list; + } + else + { + rover = prev->next; + } + } + else + { + prev = rover; + rover = rover->next; } } } |