void Player_V2CMS::stopSound(int nr) {
Common::StackLock lock(_mutex);
if (_next_nr == nr) {
_next_nr = 0;
_next_data = 0;
}
if (_current_nr == nr) {
for (int i = 0; i < 4; i++) {
clear_channel(i);
}
_current_nr = 0;
_current_data = 0;
chainNextSound();
}
if (_loadedMidiSong == nr) {
_midiData = 0;
_midiSongBegin = 0;
_midiDelay = 0;
offAllChannels();
}
}
void Player_V2Base::execute_cmd(ChannelInfo *channel) {
uint16 value;
int16 offset;
uint8 *script_ptr;
ChannelInfo * current_channel;
ChannelInfo * dest_channel;
current_channel = channel;
if (channel->d.next_cmd == 0)
goto check_stopped;
script_ptr = &_current_data[channel->d.next_cmd];
for (;;) {
uint8 opcode = *script_ptr++;
if (opcode >= 0xf8) {
switch (opcode) {
case 0xf8: // set hull curve
debug(7, "channels[%d]: hull curve %2d",
(uint)(channel - _channels), *script_ptr);
channel->d.hull_curve = hull_offsets[*script_ptr / 2];
script_ptr++;
break;
case 0xf9: // set freqmod curve
debug(7, "channels[%d]: freqmod curve %2d",
(uint)(channel - _channels), *script_ptr);
channel->d.freqmod_table = freqmod_offsets[*script_ptr / 4];
channel->d.freqmod_modulo = freqmod_lengths[*script_ptr / 4];
script_ptr++;
break;
case 0xfd: // clear other channel
value = READ_LE_UINT16 (script_ptr) / sizeof (ChannelInfo);
debug(7, "clear channel %d", value);
script_ptr += 2;
// In Indy3, when traveling to Venice a command is
// issued to clear channel 4. So we introduce a 4th
// channel, which is never used. All OOB accesses are
// mapped to this channel.
//
// The original game had room for 8 channels, but only
// channels 0-3 are read, changes to other channels
// had no effect.
if (value >= ARRAYSIZE (_channels))
value = 4;
channel = &_channels[value];
// fall through
case 0xfa: // clear current channel
if (opcode == 0xfa)
debug(7, "clear channel");
channel->d.next_cmd = 0;
channel->d.base_freq = 0;
channel->d.freq_delta = 0;
channel->d.freq = 0;
channel->d.volume = 0;
channel->d.volume_delta = 0;
channel->d.inter_note_pause = 0;
channel->d.transpose = 0;
channel->d.hull_curve = 0;
channel->d.hull_offset = 0;
channel->d.hull_counter = 0;
channel->d.freqmod_table = 0;
channel->d.freqmod_offset = 0;
channel->d.freqmod_incr = 0;
channel->d.freqmod_multiplier = 0;
channel->d.freqmod_modulo = 0;
break;
case 0xfb: // ret from subroutine
debug(7, "ret from sub");
script_ptr = _retaddr;
break;
case 0xfc: // call subroutine
offset = READ_LE_UINT16 (script_ptr);
debug(7, "subroutine %d", offset);
script_ptr += 2;
_retaddr = script_ptr;
script_ptr = _current_data + offset;
break;
case 0xfe: // loop music
opcode = *script_ptr++;
offset = READ_LE_UINT16 (script_ptr);
script_ptr += 2;
debug(7, "loop if %d to %d", opcode, offset);
if (!channel->array[opcode / 2] || --channel->array[opcode/2])
script_ptr += offset;
break;
case 0xff: // set parameter
opcode = *script_ptr++;
value = READ_LE_UINT16 (script_ptr);
channel->array[opcode / 2] = value;
debug(7, "channels[%d]: set param %2d = %5d",
(uint)(channel - _channels), opcode, value);
script_ptr += 2;
if (opcode == 14) {
/* tempo var */
_ticks_per_music_timer = 125;
}
if (opcode == 0)
goto end;
break;
}
} else { // opcode < 0xf8
for (;;) {
int16 note, octave;
int is_last_note;
dest_channel = &_channels[(opcode >> 5) & 3];
if (!(opcode & 0x80)) {
int tempo = channel->d.tempo;
if (!tempo)
tempo = 1;
channel->d.time_left = tempo * note_lengths[opcode & 0x1f];
note = *script_ptr++;
is_last_note = note & 0x80;
note &= 0x7f;
if (note == 0x7f) {
debug(8, "channels[%d]: pause %d",
(uint)(channel - _channels), channel->d.time_left);
goto end;
}
} else {
channel->d.time_left = ((opcode & 7) << 8) | *script_ptr++;
if ((opcode & 0x10)) {
debug(8, "channels[%d]: pause %d",
(uint)(channel - _channels), channel->d.time_left);
goto end;
}
is_last_note = 0;
note = (*script_ptr++) & 0x7f;
}
debug(8, "channels[%d]: @%04x note: %3d+%d len: %2d hull: %d mod: %d/%d/%d %s",
(uint)(dest_channel - channel), script_ptr ? (uint)(script_ptr - _current_data - 2) : 0,
note, (signed short) dest_channel->d.transpose, channel->d.time_left,
dest_channel->d.hull_curve, dest_channel->d.freqmod_table,
dest_channel->d.freqmod_incr,dest_channel->d.freqmod_multiplier,
is_last_note ? "last":"");
uint16 myfreq;
dest_channel->d.time_left = channel->d.time_left;
dest_channel->d.note_length =
channel->d.time_left - dest_channel->d.inter_note_pause;
note += dest_channel->d.transpose;
while (note < 0)
note += 12;
octave = note / 12;
note = note % 12;
dest_channel->d.hull_offset = 0;
dest_channel->d.hull_counter = 1;
if (_pcjr && dest_channel == &_channels[3]) {
dest_channel->d.hull_curve = 196 + note * 12;
myfreq = 384 - 64 * octave;
} else {
myfreq = _freqs_table[note] >> octave;
}
dest_channel->d.freq = dest_channel->d.base_freq = myfreq;
if (is_last_note)
goto end;
opcode = *script_ptr++;
}
}
}
end:
channel = current_channel;
if (channel->d.time_left) {
channel->d.next_cmd = script_ptr - _current_data;
return;
}
channel->d.next_cmd = 0;
check_stopped:
int i;
for (i = 0; i < 4; i++) {
if (_channels[i].d.time_left)
return;
}
_current_nr = 0;
_current_data = 0;
chainNextSound();
}