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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* Copyright (C) 2005 Karl Kurbjun based on midi2wav by Stepan Moskovchenko
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "../../plugin.h"
PLUGIN_HEADER
#define SAMPLE_RATE 22050 // 44100 22050 11025
#define MAX_VOICES 12 // Note: 24 midi channels is the minimum general midi
// spec implementation
#define BUF_SIZE 512
#define NBUF 2
#undef SYNC
struct MIDIfile * mf IBSS_ATTR;
int numberOfSamples IBSS_ATTR;
long bpm IBSS_ATTR;
#include "midi/midiutil.c"
#include "midi/guspat.h"
#include "midi/guspat.c"
#include "midi/sequencer.c"
#include "midi/midifile.c"
#include "midi/synth.c"
short gmbuf[BUF_SIZE*NBUF] IBSS_ATTR;
int quit=0;
struct plugin_api * rb;
#ifdef USE_IRAM
extern char iramcopy[];
extern char iramstart[];
extern char iramend[];
extern char iedata[];
extern char iend[];
#endif
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
rb = api;
if(parameter == NULL)
{
rb->splash(HZ*2, true, " Play .MID file ");
return PLUGIN_OK;
}
rb->lcd_setfont(0);
#ifdef USE_IRAM
rb->memcpy(iramstart, iramcopy, iramend-iramstart);
rb->memset(iedata, 0, iend - iedata);
#endif
#if !defined(SIMULATOR) && defined(HAVE_ADJUSTABLE_CPU_FREQ)
rb->cpu_boost(true);
#endif
printf("\n%s", parameter);
/* rb->splash(HZ, true, parameter); */
#ifdef RB_PROFILE
rb->profile_thread();
#endif
if(midimain(parameter) == -1)
return PLUGIN_ERROR;
#ifdef RB_PROFILE
rb->profstop();
#endif
#ifndef SIMULATOR
rb->pcm_play_stop();
rb->pcm_set_frequency(44100); // 44100
#endif
#if !defined(SIMULATOR) && defined(HAVE_ADJUSTABLE_CPU_FREQ)
rb->cpu_boost(false);
#endif
rb->splash(HZ, true, "FINISHED PLAYING");
return PLUGIN_OK;
}
bool swap=0;
bool lastswap=1;
inline void synthbuf(void)
{
short *outptr;
register int i;
static int currentSample=0;
int synthtemp[2];
#ifndef SYNC
if(lastswap==swap) return;
lastswap=swap;
outptr=(swap ? gmbuf : gmbuf+BUF_SIZE);
#else
outptr=gmbuf;
#endif
for(i=0; i<BUF_SIZE/2; i++)
{
synthSample(&synthtemp[0], &synthtemp[1]);
currentSample++;
*outptr=synthtemp[0]&0xFFFF;
outptr++;
*outptr=synthtemp[1]&0xFFFF;
outptr++;
if(currentSample==numberOfSamples)
{
if( tick() == 0 ) quit=1;
currentSample=0;
}
}
}
void get_more(unsigned char** start, size_t* size)
{
#ifndef SYNC
if(lastswap!=swap)
{
printf("Buffer miss!"); // Comment out the printf to make missses less noticable.
/*
int a=0;
for(a=0; a<MAX_VOICES; a++)
{
voices[a].isUsed=0;
}
*/
}
#else
synthbuf(); // For some reason midiplayer crashes when an update is forced
#endif
*size = BUF_SIZE*sizeof(short);
#ifndef SYNC
*start = (unsigned char*)((swap ? gmbuf : gmbuf + BUF_SIZE));
swap=!swap;
#else
*start = (unsigned char*)(gmbuf);
#endif
}
int midimain(void * filename)
{
int button;
/* rb->splash(HZ/5, true, "LOADING MIDI"); */
printf("\nLoading file");
mf= loadFile(filename);
/* rb->splash(HZ/5, true, "LOADING PATCHES"); */
if (initSynth(mf, "/.rockbox/patchset/patchset.cfg", "/.rockbox/patchset/drums.cfg") == -1)
return -1;
#ifndef SIMULATOR
rb->pcm_play_stop();
rb->pcm_set_frequency(SAMPLE_RATE); // 44100 22050 11025
#endif
/*
* tick() will do one MIDI clock tick. Then, there's a loop here that
* will generate the right number of samples per MIDI tick. The whole
* MIDI playback is timed in terms of this value.. there are no forced
* delays or anything. It just produces enough samples for each tick, and
* the playback of these samples is what makes the timings right.
*
* This seems to work quite well.
*/
printf("\nOkay, starting sequencing");
bpm=mf->div*1000000/tempo;
numberOfSamples=SAMPLE_RATE/bpm;
tick();
synthbuf();
#ifndef SIMULATOR
rb->pcm_play_data(&get_more, NULL, 0);
#endif
button=rb->button_status();
while(!quit)
{
#ifndef SYNC
synthbuf();
#endif
rb->yield();
if(rb->button_status()!=button) quit=1;
}
return 0;
}
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