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Diffstat (limited to 'engines/sci/sfx/softseq/pcspeaker.cpp')
| -rw-r--r-- | engines/sci/sfx/softseq/pcspeaker.cpp | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/engines/sci/sfx/softseq/pcspeaker.cpp b/engines/sci/sfx/softseq/pcspeaker.cpp deleted file mode 100644 index 3a05c7bef9..0000000000 --- a/engines/sci/sfx/softseq/pcspeaker.cpp +++ /dev/null @@ -1,170 +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. - * - * $URL$ - * $Id$ - * - */ - -/* PC speaker software sequencer for SCI */ - -#include "sci/sfx/softseq.h" -#include "sci/sfx/sci_midi.h" - -namespace Sci { - -#define FREQUENCY 94020 - -static int volume = 0x0600; -static int note = 0; /* Current halftone, or 0 if off */ -static int freq_count = 0; - -extern sfx_softseq_t sfx_softseq_pcspeaker; -/* Forward-declare the sequencer we are defining here */ - - -static Common::Error sps_set_option(sfx_softseq_t *self, const char *name, const char *value) { - return Common::kUnknownError; -} - -static Common::Error sps_init(sfx_softseq_t *self, byte *patch, int patch_len, byte *patch2, - int patch2_len) { - return Common::kNoError; -} - -static void sps_exit(sfx_softseq_t *self) { -} - -static void sps_event(sfx_softseq_t *self, byte command, int argc, byte *argv) { -#if 0 - fprintf(stderr, "Note [%02x : %02x %02x]\n", command, argc ? argv[0] : 0, (argc > 1) ? argv[1] : 0); -#endif - - switch (command & 0xf0) { - - case 0x80: - if (argv[0] == note) - note = 0; - break; - - case 0x90: - if (!argv[1]) { - if (argv[0] == note) - note = 0; - } else - note = argv[0]; - /* Ignore velocity otherwise; we just use the global one */ - break; - - case 0xb0: - if (argv[1] == SCI_MIDI_CHANNEL_NOTES_OFF) - note = 0; - break; - - default: -#if DEBUG - fprintf(stderr, "[SFX:PCM-PC] Unused MIDI command %02x %02x %02x\n", command, argc ? argv[0] : 0, (argc > 1) ? argv[1] : 0); -#endif - break; /* ignore */ - } -} - -#define BASE_NOTE 129 /* A10 */ -#define BASE_OCTAVE 10 /* A10, as I said */ - -static const 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 -}; - - -void sps_poll(sfx_softseq_t *self, byte *dest, int len) { - 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)); - int16 *buf = (int16 *) dest; - - int i; - for (i = 0; i < len; i++) { - if (note) { - freq_count += freq; - while (freq_count >= (FREQUENCY << 1)) - freq_count -= (FREQUENCY << 1); - - if (freq_count - freq < 0) { - /* Unclean rising edge */ - int l = volume << 1; - buf[i] = -volume + (l * freq_count) / freq; - } else if (freq_count >= FREQUENCY - && freq_count - freq < FREQUENCY) { - /* Unclean falling edge */ - int l = volume << 1; - buf[i] = volume - (l * (freq_count - FREQUENCY)) / freq; - } else { - if (freq_count < FREQUENCY) - buf[i] = volume; - else - buf[i] = -volume; - } - } else - buf[i] = 0; - } - -} - -void sps_volume(sfx_softseq_t *self, int new_volume) { - volume = new_volume << 4; -} - -void sps_allstop(sfx_softseq_t *self) { - note = 0; -} - -sfx_softseq_t sfx_softseq_pcspeaker = { - "pc-speaker", - "0.3", - sps_set_option, - sps_init, - sps_exit, - sps_volume, - sps_event, - sps_poll, - sps_allstop, - NULL, - SFX_SEQ_PATCHFILE_NONE, - SFX_SEQ_PATCHFILE_NONE, - 0x20, /* PC speaker channel only */ - 0, /* No rhythm channel */ - 1, /* # of voices */ - {FREQUENCY, SFX_PCM_MONO, SFX_PCM_FORMAT_S16_NATIVE} -}; - -} // End of namespace Sci |