[Scummvm-cvs-logs] CVS: scummvm/simon midi.cpp,1.8,1.9
Travis Howell
kirben at users.sourceforge.net
Tue Nov 12 16:25:04 CET 2002
Update of /cvsroot/scummvm/scummvm/simon
In directory usw-pr-cvs1:/tmp/cvs-serv7679/simon
Modified Files:
midi.cpp
Log Message:
Add midi streaming support from Jamieson630
Index: midi.cpp
===================================================================
RCS file: /cvsroot/scummvm/scummvm/simon/midi.cpp,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -d -r1.8 -r1.9
--- midi.cpp 10 Nov 2002 15:24:17 -0000 1.8
+++ midi.cpp 13 Nov 2002 00:24:47 -0000 1.9
@@ -1,412 +1,423 @@
-/* ScummVM - Scumm Interpreter
- * Copyright (C) 2001/2002 The ScummVM project
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * $Header$
- *
- */
-
-
-#include "stdafx.h"
-#include "scummsys.h"
-#include "common/system.h"
-#include "common/file.h"
-#include "sound/mididrv.h"
-#include "sound/mixer.h"
-#include "simon/simon.h"
-
-void MidiPlayer::read_all_songs(File *in)
-{
- uint i, num;
-
- _currentSong = _songs;
-
- num = in->readByte();
-
- for (i = 0; i != num; i++) {
- read_one_song(in, &_songs[i]);
- }
-}
-
-void MidiPlayer::read_all_songs_old(File *in)
-{
- uint i, num;
-
- _currentSong = _songs;
-
- num = 1;
-
- for (i = 0; i != num; i++) {
- read_one_song(in, &_songs[i]);
- }
-}
-
-void MidiPlayer::read_mthd(File *in, Song *s, bool old)
-{
- Track *t;
- uint i;
-
- if (!old) {
- if (in->readUint32BE() != 6)
- error("Invalid 'MThd' chunk size");
- s->midi_format = in->readUint16BE();
- s->num_tracks = in->readUint16BE();
- s->ppqn = in->readUint16BE();
- } else {
- s->midi_format = 0;
- s->num_tracks = 1;
- s->ppqn = 0xc0;
-
- in->readUint16BE();
- in->readByte();
- }
-
- s->tracks = t = (Track *)calloc(s->num_tracks, sizeof(Track));
- if (t == NULL)
- error("Out of memory when allocating MIDI tracks");
-
- for (i = 0; i != s->num_tracks; i++, t++) {
- if (!old) {
- if (in->readUint32BE() != 'MTrk')
- error("Midi track has no 'MTrk'");
-
- t->data_size = in->readUint32BE();
- } else {
- uint32 pos = in->pos();
- in->seek(0, SEEK_END);
- uint32 end = in->pos();
- in->seek(pos, SEEK_SET);
- t->data_size = end - pos;
- }
-
- t->data_ptr = (byte *)calloc(t->data_size, 1);
- if (t->data_ptr == NULL)
- error("Out of memory when allocating MIDI track data (%d)", t->data_size);
-
- in->read(t->data_ptr, t->data_size);
-
- t->data_cur_size = t->data_size;
- t->data_cur_ptr = t->data_ptr;
-
- t->a = 0;
- t->last_cmd = 0;
- t->delay = 0;
-
- if (t->data_cur_size == 0) {
- t->a |= 1;
- continue;
- }
-
- t->delay = track_read_gamma(t);
- }
-}
-
-void MidiPlayer::read_one_song(File *in, Song *s)
-{
- _lastDelay = 0;
-
- s->ppqn = 0;
- s->midi_format = 0;
- s->num_tracks = 0;
- s->tracks = NULL;
-
- uint32 id = in->readUint32BE();
-
- switch (id) {
- case 'MThd':
- read_mthd(in, s, false);
- break;
-
- case 'GMF\x1':
- warning("Old style songs not properly supported yet");
- read_mthd(in, s, true);
- break;
-
- default:
- warning("Midi song has no 'MThd'");
- }
-
-}
-
-uint32 MidiPlayer::track_read_gamma(Track *t)
-{
- uint32 sum;
- byte b;
-
- sum = 0;
- do {
- b = track_read_byte(t);
- sum = (sum << 7) | (b & 0x7F);
- } while (b & 0x80);
-
- return sum;
-}
-
-byte MidiPlayer::track_read_byte(Track *t)
-{
- if (t->a & 1)
- error("Trying to read byte from MIDI stream when end reached");
-
- if (!--t->data_cur_size) {
- t->a |= 1;
- }
-
- return *t->data_cur_ptr++;
-}
-
-void MidiPlayer::initialize()
-{
- int res;
- int i;
-
- for (i = 0; i != 16; i++)
- _volumeTable[i] = 100;
-
- _midiDriver->property(MidiDriver::PROP_TIMEDIV, _songs[0].ppqn);
-
- res = _midiDriver->open(MidiDriver::MO_STREAMING);
- if (res != 0)
- error("MidiPlayer::initializer, got %s", MidiDriver::get_error_name(res));
-}
-
-int MidiPlayer::fill(MidiEvent *me, int num_event)
-{
- uint32 best, j;
- Track *best_track, *t;
- bool did_reset;
- NoteRec midi_tmp_note_rec;
- int i = 0;
-
- did_reset = false;
-
- for (i = 0; i != num_event;) {
- best_track = NULL;
- best = 0xFFFFFFFF;
-
- /* Locate which track that's next */
- t = _currentSong->tracks;
- for (j = _currentSong->num_tracks; j; j--, t++) {
- if (!(t->a & 1)) {
- if (t->delay < best) {
- best = t->delay;
- best_track = t;
- }
- }
- }
-
- if (best_track == NULL) {
- /* reset tracks if song ended? */
- if (did_reset) {
- /* exit if song ended completely */
- return i;
- }
- did_reset = true;
- reset_tracks();
- continue;
- }
-
- read_next_note(best_track, &midi_tmp_note_rec);
- if (fill_helper(&midi_tmp_note_rec, me + i))
- i++;
-
- if (midi_tmp_note_rec.sysex_data)
- free(midi_tmp_note_rec.sysex_data);
- }
-
- return i;
-}
-
-int MidiPlayer::on_fill(void *param, MidiEvent *ev, int num)
-{
- MidiPlayer *mp = (MidiPlayer *) param;
- return mp->fill(ev, num);
-}
-
-bool MidiPlayer::fill_helper(NoteRec *nr, MidiEvent *me)
-{
- uint b;
-
- b = nr->delay - _lastDelay;
- _lastDelay = nr->delay;
-
- if (nr->cmd < 0xF0) {
- me->delta = b;
- me->event = nr->cmd | (nr->param_1 << 8) | (nr->param_2 << 16);
-
- if ((nr->cmd & 0xF0) == 0xB0 && nr->param_1 == 7) {
- _volumeTable[nr->cmd & 0xF] = nr->param_2;
- nr->param_1 = 0x76;
- me->event = nr->cmd | (nr->param_1 << 8) | (nr->param_2 << 16) /* | MEVT_F_CALLBACK */ ;
- }
- return true;
-
- }
-
- if (nr->cmd == 0xF0 || nr->cmd == 0xF7 || nr->param_1 != 0x51) {
- return false;
- }
-
- int tempo = nr->sysex_data[2] | (nr->sysex_data[1] << 8) | (nr->sysex_data[0] << 16);
-// _midi_var8 = (_currentSong->ppqn * 60000) / tempo;
-
- me->delta = b;
- me->event = (MidiDriver::ME_TEMPO << 24) | tempo;
-
- return true;
-}
-
-void MidiPlayer::reset_tracks()
-{
- Track *t;
- uint i;
-
- _lastDelay = 0;
-
- for (i = 0, t = _currentSong->tracks; i != _currentSong->num_tracks; i++, t++) {
- t->data_cur_size = t->data_size;
- t->data_cur_ptr = t->data_ptr;
- t->a = 0;
- t->last_cmd = 0;
- t->delay = 0;
- if (t->data_cur_size == 0) {
- t->a |= 1;
- } else {
- t->delay = track_read_gamma(t);
- }
- }
-}
-
-void MidiPlayer::read_next_note(Track *t, NoteRec *nr)
-{
- byte cmd_byte;
- uint i;
-
- nr->delay = 0;
- nr->cmd = 0;
- nr->param_1 = 0;
- nr->param_2 = 0;
- nr->cmd_length = 0;
- nr->sysex_data = NULL;
-
- if (t->a & 1 || t->data_cur_size == 0)
- error("read next note when track ended");
-
- /* read next midi byte, but skip any pitch bends. */
- for (;;) {
- cmd_byte = track_read_byte(t);
- if ((cmd_byte & 0xF0) != 0xE0)
- break;
-
- track_read_byte(t);
- track_read_byte(t);
- }
-
- if (!(cmd_byte & 0x80)) {
- /* running status? */
- if (t->last_cmd == 0)
- error("Last cmd = 0");
- nr->cmd = t->last_cmd;
- nr->param_1 = cmd_byte;
- cmd_byte = nr->cmd & 0xF0;
- nr->cmd_length = 2;
- if (cmd_byte != 0xC0 && cmd_byte != 0xD0) {
- nr->param_2 = track_read_byte(t);
- nr->cmd_length++;
- }
- } else if ((cmd_byte & 0xF0) != 0xF0) {
- nr->cmd = cmd_byte;
- t->last_cmd = cmd_byte;
- cmd_byte &= 0xF0;
- nr->cmd_length = (cmd_byte == 0xC0 || cmd_byte == 0xD0) ? 2 : 3;
-
- if (t->data_cur_size < nr->cmd_length - 1) {
- error("read_next_note: end of stream");
- }
-
- nr->param_1 = track_read_byte(t);
- if (nr->cmd_length == 3)
- nr->param_2 = track_read_byte(t);
-
- } else if (cmd_byte == 0xF0 || cmd_byte == 0xF7) {
- nr->cmd = cmd_byte;
- nr->cmd_length = track_read_gamma(t);
- if (t->data_cur_size < nr->cmd_length)
- error("read_next_note: end of stream 2");
- nr->sysex_data = (byte *)malloc(nr->cmd_length);
- if (nr->sysex_data == NULL)
- error("read_next_note: out of memory");
- for (i = 0; i != nr->cmd_length; i++)
- nr->sysex_data[i] = track_read_byte(t);
- } else if (cmd_byte == 0xFF) {
-
- nr->cmd = cmd_byte;
- nr->param_1 = track_read_byte(t);
- nr->cmd_length = track_read_gamma(t);
- if (nr->cmd_length) {
- if (t->data_cur_size < nr->cmd_length)
- error("read_next_note: end of stream 3");
- nr->sysex_data = (byte *)malloc(nr->cmd_length);
- if (nr->sysex_data == NULL)
- error("read_next_note: out of memory");
- for (i = 0; i != nr->cmd_length; i++)
- nr->sysex_data[i] = track_read_byte(t);
- }
- if (nr->param_1 == 0x2F)
- t->a |= 1;
- } else {
- error("Invalid sysex cmd");
- }
-
- nr->delay = t->delay;
- if (!(t->a & 1)) {
- t->delay += track_read_gamma(t);
- }
-}
-
-void MidiPlayer::shutdown()
-{
- _midiDriver->close();
- unload();
-}
-
-void MidiPlayer::unload()
-{
- uint i, j;
- Song *s;
- Track *t;
- for (i = 0, s = _songs; i != 8; i++, s++) {
- if (s->tracks) {
- for (j = 0, t = s->tracks; j != s->num_tracks; j++, t++) {
- if (t->data_ptr)
- free(t->data_ptr);
- }
- free(s->tracks);
- s->tracks = NULL;
- }
- }
-}
-
-void MidiPlayer::play()
-{
- _midiDriver->pause(false);
-}
-
-
-void MidiPlayer::set_driver(MidiDriver *md)
-{
- _midiDriver = md;
- md->set_stream_callback(this, on_fill);
-}
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001/2002 The ScummVM project
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+
+#include "stdafx.h"
+#include "scummsys.h"
+#include "common/system.h"
+#include "common/file.h"
+#include "sound/mididrv.h"
+#include "sound/mixer.h"
+#include "simon/simon.h"
+
+// FIXME: This is a horrible place to put this, but for now....
+#include "sound/midistreamer.cpp"
+
+void MidiPlayer::read_all_songs(File *in)
+{
+ uint i, num;
+
+ _currentSong = _songs;
+
+ num = in->readByte();
+
+ for (i = 0; i != num; i++) {
+ read_one_song(in, &_songs[i]);
+ }
+}
+
+void MidiPlayer::read_all_songs_old(File *in)
+{
+ uint i, num;
+
+ _currentSong = _songs;
+
+ num = 1;
+
+ for (i = 0; i != num; i++) {
+ read_one_song(in, &_songs[i]);
+ }
+}
+
+void MidiPlayer::read_mthd(File *in, Song *s, bool old)
+{
+ Track *t;
+ uint i;
+
+ if (!old) {
+ if (in->readUint32BE() != 6)
+ error("Invalid 'MThd' chunk size");
+ s->midi_format = in->readUint16BE();
+ s->num_tracks = in->readUint16BE();
+ s->ppqn = in->readUint16BE();
+ } else {
+ s->midi_format = 0;
+ s->num_tracks = 1;
+ s->ppqn = 0xc0;
+
+ in->readUint16BE();
+ in->readByte();
+ }
+
+ s->tracks = t = (Track *)calloc(s->num_tracks, sizeof(Track));
+ if (t == NULL)
+ error("Out of memory when allocating MIDI tracks");
+
+ for (i = 0; i != s->num_tracks; i++, t++) {
+ if (!old) {
+ if (in->readUint32BE() != 'MTrk')
+ error("Midi track has no 'MTrk'");
+
+ t->data_size = in->readUint32BE();
+ } else {
+ uint32 pos = in->pos();
+ in->seek(0, SEEK_END);
+ uint32 end = in->pos();
+ in->seek(pos, SEEK_SET);
+ t->data_size = end - pos;
+ }
+
+ t->data_ptr = (byte *)calloc(t->data_size, 1);
+ if (t->data_ptr == NULL)
+ error("Out of memory when allocating MIDI track data (%d)", t->data_size);
+
+ in->read(t->data_ptr, t->data_size);
+
+ t->data_cur_size = t->data_size;
+ t->data_cur_ptr = t->data_ptr;
+
+ t->a = 0;
+ t->last_cmd = 0;
+ t->delay = 0;
+
+ if (t->data_cur_size == 0) {
+ t->a |= 1;
+ continue;
+ }
+
+ t->delay = track_read_gamma(t);
+ }
+}
+
+void MidiPlayer::read_one_song(File *in, Song *s)
+{
+ _lastDelay = 0;
+
+ s->ppqn = 0;
+ s->midi_format = 0;
+ s->num_tracks = 0;
+ s->tracks = NULL;
+
+ uint32 id = in->readUint32BE();
+
+ switch (id) {
+ case 'MThd':
+ read_mthd(in, s, false);
+ break;
+
+ case 'GMF\x1':
+ warning("Old style songs not properly supported yet");
+ read_mthd(in, s, true);
+ break;
+
+ default:
+ warning("Midi song has no 'MThd'");
+ }
+
+}
+
+uint32 MidiPlayer::track_read_gamma(Track *t)
+{
+ uint32 sum;
+ byte b;
+
+ sum = 0;
+ do {
+ b = track_read_byte(t);
+ sum = (sum << 7) | (b & 0x7F);
+ } while (b & 0x80);
+
+ return sum;
+}
+
+byte MidiPlayer::track_read_byte(Track *t)
+{
+ if (t->a & 1)
+ error("Trying to read byte from MIDI stream when end reached");
+
+ if (!--t->data_cur_size) {
+ t->a |= 1;
+ }
+
+ return *t->data_cur_ptr++;
+}
+
+void MidiPlayer::initialize()
+{
+ int res;
+ int i;
+
+ for (i = 0; i != 16; i++)
+ _volumeTable[i] = 100;
+
+ _midiDriver->property(MidiDriver::PROP_TIMEDIV, _songs[0].ppqn);
+
+ res = _midiDriver->open(MidiDriver::MO_STREAMING);
+ if (res == MidiDriver::MERR_STREAMING_NOT_AVAILABLE) {
+ // No direct streaming, slap a front-end on.
+ _midiDriver = new MidiStreamer (_midiDriver);
+ _midiDriver->property (MidiDriver::PROP_TIMEDIV, _songs[0].ppqn);
+ _midiDriver->set_stream_callback (this, on_fill);
+ res = _midiDriver->open (MidiDriver::MO_STREAMING);
+ }
+
+ if (res != 0)
+ error("MidiPlayer::initializer, got %s", MidiDriver::get_error_name(res));
+}
+
+int MidiPlayer::fill(MidiEvent *me, int num_event)
+{
+ uint32 best, j;
+ Track *best_track, *t;
+ bool did_reset;
+ NoteRec midi_tmp_note_rec;
+ int i = 0;
+
+ did_reset = false;
+
+ for (i = 0; i != num_event;) {
+ best_track = NULL;
+ best = 0xFFFFFFFF;
+
+ /* Locate which track that's next */
+ t = _currentSong->tracks;
+ for (j = _currentSong->num_tracks; j; j--, t++) {
+ if (!(t->a & 1)) {
+ if (t->delay < best) {
+ best = t->delay;
+ best_track = t;
+ }
+ }
+ }
+
+ if (best_track == NULL) {
+ /* reset tracks if song ended? */
+ if (did_reset) {
+ /* exit if song ended completely */
+ return i;
+ }
+ did_reset = true;
+ reset_tracks();
+ continue;
+ }
+
+ read_next_note(best_track, &midi_tmp_note_rec);
+ if (fill_helper(&midi_tmp_note_rec, me + i))
+ i++;
+
+ if (midi_tmp_note_rec.sysex_data)
+ free(midi_tmp_note_rec.sysex_data);
+ }
+
+ return i;
+}
+
+int MidiPlayer::on_fill(void *param, MidiEvent *ev, int num)
+{
+ MidiPlayer *mp = (MidiPlayer *) param;
+ return mp->fill(ev, num);
+}
+
+bool MidiPlayer::fill_helper(NoteRec *nr, MidiEvent *me)
+{
+ uint b;
+
+ b = nr->delay - _lastDelay;
+ _lastDelay = nr->delay;
+
+ if (nr->cmd < 0xF0) {
+ me->delta = b;
+ me->event = nr->cmd | (nr->param_1 << 8) | (nr->param_2 << 16);
+
+ if ((nr->cmd & 0xF0) == 0xB0 && nr->param_1 == 7) {
+ _volumeTable[nr->cmd & 0xF] = nr->param_2;
+ nr->param_1 = 0x76;
+ me->event = nr->cmd | (nr->param_1 << 8) | (nr->param_2 << 16) /* | MEVT_F_CALLBACK */ ;
+ }
+ return true;
+
+ }
+
+ if (nr->cmd == 0xF0 || nr->cmd == 0xF7 || nr->param_1 != 0x51) {
+ return false;
+ }
+
+ int tempo = nr->sysex_data[2] | (nr->sysex_data[1] << 8) | (nr->sysex_data[0] << 16);
+// _midi_var8 = (_currentSong->ppqn * 60000) / tempo;
+
+ me->delta = b;
+ me->event = (MidiDriver::ME_TEMPO << 24) | tempo;
+
+ return true;
+}
+
+void MidiPlayer::reset_tracks()
+{
+ Track *t;
+ uint i;
+
+ _lastDelay = 0;
+
+ for (i = 0, t = _currentSong->tracks; i != _currentSong->num_tracks; i++, t++) {
+ t->data_cur_size = t->data_size;
+ t->data_cur_ptr = t->data_ptr;
+ t->a = 0;
+ t->last_cmd = 0;
+ t->delay = 0;
+ if (t->data_cur_size == 0) {
+ t->a |= 1;
+ } else {
+ t->delay = track_read_gamma(t);
+ }
+ }
+}
+
+void MidiPlayer::read_next_note(Track *t, NoteRec *nr)
+{
+ byte cmd_byte;
+ uint i;
+
+ nr->delay = 0;
+ nr->cmd = 0;
+ nr->param_1 = 0;
+ nr->param_2 = 0;
+ nr->cmd_length = 0;
+ nr->sysex_data = NULL;
+
+ if (t->a & 1 || t->data_cur_size == 0)
+ error("read next note when track ended");
+
+ /* read next midi byte, but skip any pitch bends. */
+ for (;;) {
+ cmd_byte = track_read_byte(t);
+ if ((cmd_byte & 0xF0) != 0xE0)
+ break;
+
+ track_read_byte(t);
+ track_read_byte(t);
+ }
+
+ if (!(cmd_byte & 0x80)) {
+ /* running status? */
+ if (t->last_cmd == 0)
+ error("Last cmd = 0");
+ nr->cmd = t->last_cmd;
+ nr->param_1 = cmd_byte;
+ cmd_byte = nr->cmd & 0xF0;
+ nr->cmd_length = 2;
+ if (cmd_byte != 0xC0 && cmd_byte != 0xD0) {
+ nr->param_2 = track_read_byte(t);
+ nr->cmd_length++;
+ }
+ } else if ((cmd_byte & 0xF0) != 0xF0) {
+ nr->cmd = cmd_byte;
+ t->last_cmd = cmd_byte;
+ cmd_byte &= 0xF0;
+ nr->cmd_length = (cmd_byte == 0xC0 || cmd_byte == 0xD0) ? 2 : 3;
+
+ if (t->data_cur_size < nr->cmd_length - 1) {
+ error("read_next_note: end of stream");
+ }
+
+ nr->param_1 = track_read_byte(t);
+ if (nr->cmd_length == 3)
+ nr->param_2 = track_read_byte(t);
+
+ } else if (cmd_byte == 0xF0 || cmd_byte == 0xF7) {
+ nr->cmd = cmd_byte;
+ nr->cmd_length = track_read_gamma(t);
+ if (t->data_cur_size < nr->cmd_length)
+ error("read_next_note: end of stream 2");
+ nr->sysex_data = (byte *)malloc(nr->cmd_length);
+ if (nr->sysex_data == NULL)
+ error("read_next_note: out of memory");
+ for (i = 0; i != nr->cmd_length; i++)
+ nr->sysex_data[i] = track_read_byte(t);
+ } else if (cmd_byte == 0xFF) {
+
+ nr->cmd = cmd_byte;
+ nr->param_1 = track_read_byte(t);
+ nr->cmd_length = track_read_gamma(t);
+ if (nr->cmd_length) {
+ if (t->data_cur_size < nr->cmd_length)
+ error("read_next_note: end of stream 3");
+ nr->sysex_data = (byte *)malloc(nr->cmd_length);
+ if (nr->sysex_data == NULL)
+ error("read_next_note: out of memory");
+ for (i = 0; i != nr->cmd_length; i++)
+ nr->sysex_data[i] = track_read_byte(t);
+ }
+ if (nr->param_1 == 0x2F)
+ t->a |= 1;
+ } else {
+ error("Invalid sysex cmd");
+ }
+
+ nr->delay = t->delay;
+ if (!(t->a & 1)) {
+ t->delay += track_read_gamma(t);
+ }
+}
+
+void MidiPlayer::shutdown()
+{
+ _midiDriver->close();
+ unload();
+}
+
+void MidiPlayer::unload()
+{
+ uint i, j;
+ Song *s;
+ Track *t;
+ for (i = 0, s = _songs; i != 8; i++, s++) {
+ if (s->tracks) {
+ for (j = 0, t = s->tracks; j != s->num_tracks; j++, t++) {
+ if (t->data_ptr)
+ free(t->data_ptr);
+ }
+ free(s->tracks);
+ s->tracks = NULL;
+ }
+ }
+}
+
+void MidiPlayer::play()
+{
+ _midiDriver->pause(false);
+}
+
+
+void MidiPlayer::set_driver(MidiDriver *md)
+{
+ _midiDriver = md;
+ _midiDriver->set_stream_callback(this, on_fill);
+}
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