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Diffstat (limited to 'engines/sci/sfx/softseq/pcjr.cpp')
| -rw-r--r-- | engines/sci/sfx/softseq/pcjr.cpp | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/engines/sci/sfx/softseq/pcjr.cpp b/engines/sci/sfx/softseq/pcjr.cpp deleted file mode 100644 index a80a188751..0000000000 --- a/engines/sci/sfx/softseq/pcjr.cpp +++ /dev/null @@ -1,209 +0,0 @@ -/* ScummVM - Graphic Adventure Engine - * - * ScummVM is the legal property of its developers, whose names - * are too numerous to list here. Please refer to the COPYRIGHT - * file distributed with this source distribution. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - * $URL$ - * $Id$ - * - */ - -#include "sci/sfx/softseq/mididriver.h" -#include "sci/sfx/softseq/pcjr.h" - -namespace Sci { - -#define FREQUENCY 44100 -#define VOLUME_SHIFT 3 - -#define BASE_NOTE 129 // A10 -#define BASE_OCTAVE 10 // A10, as I said - -const static int freq_table[12] = { // A4 is 440Hz, halftone map is x |-> ** 2^(x/12) - 28160, // A10 - 29834, - 31608, - 33488, - 35479, - 37589, - 39824, - 42192, - 44701, - 47359, - 50175, - 53159 -}; - -static inline int get_freq(int note) { - int halftone_delta = note - BASE_NOTE; - int oct_diff = ((halftone_delta + BASE_OCTAVE * 12) / 12) - BASE_OCTAVE; - int halftone_index = (halftone_delta + (12 * 100)) % 12 ; - int freq = (!note) ? 0 : freq_table[halftone_index] / (1 << (-oct_diff)); - - return freq; -} - -void MidiDriver_PCJr::send(uint32 b) { - byte command = b & 0xff; - byte op1 = (b >> 8) & 0xff; - byte op2 = (b >> 16) & 0xff; - int i; - int mapped_chan = -1; - int chan_nr = command & 0xf; - - // First, test for channel having been assigned already - if (_channels_assigned & (1 << chan_nr)) { - // Already assigned this channel number: - for (i = 0; i < _channels_nr; i++) - if (_chan_nrs[i] == chan_nr) { - mapped_chan = i; - break; - } - } else if ((command & 0xe0) == 0x80) { - // Assign new channel round-robin - - // Mark channel as unused: - if (_chan_nrs[_channel_assigner] >= 0) - _channels_assigned &= ~(1 << _chan_nrs[_channel_assigner]); - - // Remember channel: - _chan_nrs[_channel_assigner] = chan_nr; - // Mark channel as used - _channels_assigned |= (1 << _chan_nrs[_channel_assigner]); - - // Save channel for use later in this call: - mapped_chan = _channel_assigner; - // Round-ropin iterate channel assigner: - _channel_assigner = (_channel_assigner + 1) % _channels_nr; - } - - if (mapped_chan == -1) - return; - - switch (command & 0xf0) { - - case 0x80: - if (op1 == _notes[mapped_chan]) - _notes[mapped_chan] = 0; - break; - - case 0x90: - if (!op2) { - if (op1 == _notes[mapped_chan]) - _notes[mapped_chan] = 0; - } else { - _notes[mapped_chan] = op1; - _volumes[mapped_chan] = op2; - } - break; - - case 0xb0: - if ((op1 == SCI_MIDI_CHANNEL_NOTES_OFF) || (op1 == SCI_MIDI_CHANNEL_SOUND_OFF)) - _notes[mapped_chan] = 0; - break; - - default: - debug(2, "Unused MIDI command %02x %02x %02x", command, op1, op2); - break; /* ignore */ - } -} - -void MidiDriver_PCJr::generateSamples(int16 *data, int len) { - int i; - int chan; - int freq[kMaxChannels]; - - for (chan = 0; chan < _channels_nr; chan++) - freq[chan] = get_freq(_notes[chan]); - - for (i = 0; i < len; i++) { - int16 result = 0; - - for (chan = 0; chan < _channels_nr; chan++) - if (_notes[chan]) { - int volume = (_global_volume * _volumes[chan]) - >> VOLUME_SHIFT; - - _freq_count[chan] += freq[chan]; - while (_freq_count[chan] >= (FREQUENCY << 1)) - _freq_count[chan] -= (FREQUENCY << 1); - - if (_freq_count[chan] - freq[chan] < 0) { - /* Unclean rising edge */ - int l = volume << 1; - result += -volume + (l * _freq_count[chan]) / freq[chan]; - } else if (_freq_count[chan] >= FREQUENCY - && _freq_count[chan] - freq[chan] < FREQUENCY) { - /* Unclean falling edge */ - int l = volume << 1; - result += volume - (l * (_freq_count[chan] - FREQUENCY)) / freq[chan]; - } else { - if (_freq_count[chan] < FREQUENCY) - result += volume; - else - result += -volume; - } - } - data[i] = result; - } -} - -int MidiDriver_PCJr::open(int channels) { - if (_isOpen) - return MERR_ALREADY_OPEN; - - if (channels > kMaxChannels) - return -1; - - _channels_nr = channels; - _global_volume = 100; - for (int i = 0; i < _channels_nr; i++) { - _volumes[i] = 100; - _notes[i] = 0; - _freq_count[i] = 0; - _chan_nrs[i] = -1; - } - _channel_assigner = 0; - _channels_assigned = 0; - - MidiDriver_Emulated::open(); - - _mixer->playInputStream(Audio::Mixer::kPlainSoundType, &_mixerSoundHandle, this, -1); - - return 0; -} - -void MidiDriver_PCJr::close() { - _mixer->stopHandle(_mixerSoundHandle); -} - -int MidiPlayer_PCJr::getPlayMask(SciVersion soundVersion) { - if (soundVersion == SCI_VERSION_0_EARLY) - return 0x10; // FIXME: Not correct - - return 0x10; -} - -int MidiPlayer_PCSpeaker::getPlayMask(SciVersion soundVersion) { - if (soundVersion == SCI_VERSION_0_EARLY) - return 0x02; - - return 0x20; -} - -} // End of namespace Sci |