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Diffstat (limited to 'engines/scumm/player_mod.cpp')
-rw-r--r-- | engines/scumm/player_mod.cpp | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/engines/scumm/player_mod.cpp b/engines/scumm/player_mod.cpp deleted file mode 100644 index 6411f0a17a..0000000000 --- a/engines/scumm/player_mod.cpp +++ /dev/null @@ -1,223 +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. - * - */ - - -#include "scumm/player_mod.h" -#include "audio/mixer.h" -#include "audio/rate.h" -#include "audio/decoders/raw.h" - -namespace Scumm { - -Player_MOD::Player_MOD(Audio::Mixer *mixer) - : _mixer(mixer), _sampleRate(mixer->getOutputRate()) { - int i; - _mixamt = 0; - _mixpos = 0; - - for (i = 0; i < MOD_MAXCHANS; i++) { - _channels[i].id = 0; - _channels[i].vol = 0; - _channels[i].freq = 0; - _channels[i].input = NULL; - _channels[i].ctr = 0; - _channels[i].pos = 0; - } - - _playproc = NULL; - _playparam = NULL; - - _mixer->playStream(Audio::Mixer::kPlainSoundType, &_soundHandle, this, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO, true); -} - -Player_MOD::~Player_MOD() { - _mixer->stopHandle(_soundHandle); - for (int i = 0; i < MOD_MAXCHANS; i++) { - if (!_channels[i].id) - continue; - delete _channels[i].input; - } -} - -void Player_MOD::setMusicVolume(int vol) { - _maxvol = vol; -} - -void Player_MOD::setUpdateProc(ModUpdateProc *proc, void *param, int freq) { - _playproc = proc; - _playparam = param; - _mixamt = _sampleRate / freq; -} -void Player_MOD::clearUpdateProc() { - _playproc = NULL; - _playparam = NULL; - _mixamt = 0; -} - -void Player_MOD::startChannel(int id, void *data, int size, int rate, uint8 vol, int loopStart, int loopEnd, int8 pan) { - int i; - if (id == 0) - error("player_mod - attempted to start channel id 0"); - - for (i = 0; i < MOD_MAXCHANS; i++) { - if (!_channels[i].id) - break; - } - if (i == MOD_MAXCHANS) { - warning("player_mod - too many music channels playing (%i max)",MOD_MAXCHANS); - return; - } - _channels[i].id = id; - _channels[i].vol = vol; - _channels[i].pan = pan; - _channels[i].freq = rate; - _channels[i].ctr = 0; - - Audio::SeekableAudioStream *stream = Audio::makeRawStream((const byte *)data, size, rate, 0); - if (loopStart != loopEnd) { - _channels[i].input = new Audio::SubLoopingAudioStream(stream, 0, Audio::Timestamp(0, loopStart, rate), Audio::Timestamp(0, loopEnd, rate)); - } else { - _channels[i].input = stream; - } - - // read the first sample - _channels[i].input->readBuffer(&_channels[i].pos, 1); -} - -void Player_MOD::stopChannel(int id) { - if (id == 0) - error("player_mod - attempted to stop channel id 0"); - for (int i = 0; i < MOD_MAXCHANS; i++) { - if (_channels[i].id == id) { - delete _channels[i].input; - _channels[i].input = NULL; - _channels[i].id = 0; - _channels[i].vol = 0; - _channels[i].freq = 0; - _channels[i].ctr = 0; - _channels[i].pos = 0; - } - } -} -void Player_MOD::setChannelVol(int id, uint8 vol) { - if (id == 0) - error("player_mod - attempted to set volume for channel id 0"); - for (int i = 0; i < MOD_MAXCHANS; i++) { - if (_channels[i].id == id) { - _channels[i].vol = vol; - break; - } - } -} - -void Player_MOD::setChannelPan(int id, int8 pan) { - if (id == 0) - error("player_mod - attempted to set pan for channel id 0"); - for (int i = 0; i < MOD_MAXCHANS; i++) { - if (_channels[i].id == id) { - _channels[i].pan = pan; - break; - } - } -} - -void Player_MOD::setChannelFreq(int id, int freq) { - if (id == 0) - error("player_mod - attempted to set frequency for channel id 0"); - for (int i = 0; i < MOD_MAXCHANS; i++) { - if (_channels[i].id == id) { - if (freq > 31400) // this is about as high as WinUAE goes - freq = 31400; // can't easily verify on my own Amiga - _channels[i].freq = freq; - break; - } - } -} - -void Player_MOD::do_mix(int16 *data, uint len) { - int i; - int dpos = 0; - uint dlen = 0; - memset(data, 0, 2 * len * sizeof(int16)); - while (len) { - if (_playproc) { - dlen = _mixamt - _mixpos; - if (!_mixpos) - _playproc(_playparam); - if (dlen <= len) { - _mixpos = 0; - len -= dlen; - } else { - _mixpos = len; - dlen = len; - len = 0; - } - } else { - dlen = len; - len = 0; - } - for (i = 0; i < MOD_MAXCHANS; i++) { - if (_channels[i].id) { - Audio::st_volume_t vol_l = (127 - _channels[i].pan) * _channels[i].vol / 127; - Audio::st_volume_t vol_r = (127 + _channels[i].pan) * _channels[i].vol / 127; - for (uint j = 0; j < dlen; j++) { - // simple linear resample, unbuffered - int delta = (uint32)(_channels[i].freq * 0x10000) / _sampleRate; - uint16 cfrac = ~_channels[i].ctr & 0xFFFF; - if (_channels[i].ctr + delta < 0x10000) - cfrac = delta; - _channels[i].ctr += delta; - int32 cpos = _channels[i].pos * cfrac / 0x10000; - while (_channels[i].ctr >= 0x10000) { - if (_channels[i].input->readBuffer(&_channels[i].pos, 1) != 1) { // out of data - stopChannel(_channels[i].id); - goto skipchan; // exit 2 loops at once - } - _channels[i].ctr -= 0x10000; - if (_channels[i].ctr > 0x10000) - cpos += _channels[i].pos; - else - cpos += (int32)(_channels[i].pos * (_channels[i].ctr & 0xFFFF)) / 0x10000; - } - int16 pos = 0; - // if too many samples play in a row, the calculation below will overflow and clip - // so try and split it up into pieces it can manage comfortably - while (cpos < -0x8000) { - pos -= 0x80000000 / delta; - cpos += 0x8000; - } - while (cpos > 0x7FFF) { - pos += 0x7FFF0000 / delta; - cpos -= 0x7FFF; - } - pos += cpos * 0x10000 / delta; - Audio::clampedAdd(data[(dpos + j) * 2 + 0], pos * vol_l / Audio::Mixer::kMaxMixerVolume); - Audio::clampedAdd(data[(dpos + j) * 2 + 1], pos * vol_r / Audio::Mixer::kMaxMixerVolume); - } - } -skipchan: ; // channel ran out of data - } - dpos += dlen; - } -} - -} // End of namespace Scumm |