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rockbox/apps/plugins/midiplay.c

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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
PLUGIN_IRAM_DECLARE
/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define BTN_QUIT BUTTON_OFF
#define BTN_RIGHT BUTTON_RIGHT
#define BTN_UP BUTTON_UP
#define BTN_DOWN BUTTON_DOWN
#elif CONFIG_KEYPAD == ONDIO_PAD
#define BTN_QUIT BUTTON_OFF
#define BTN_RIGHT BUTTON_RIGHT
#define BTN_UP BUTTON_UP
#define BTN_DOWN BUTTON_DOWN
#elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || (CONFIG_KEYPAD == IRIVER_H300_PAD)
#define BTN_QUIT BUTTON_OFF
#define BTN_RIGHT BUTTON_RIGHT
#define BTN_UP BUTTON_UP
#define BTN_DOWN BUTTON_DOWN
#define BTN_RC_QUIT BUTTON_RC_STOP
#elif (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IPOD_3G_PAD) || \
(CONFIG_KEYPAD == IPOD_1G2G_PAD)
#define BTN_QUIT (BUTTON_SELECT | BUTTON_MENU)
#define BTN_RIGHT BUTTON_RIGHT
#define BTN_UP BUTTON_SCROLL_FWD
#define BTN_DOWN BUTTON_SCROLL_BACK
#elif (CONFIG_KEYPAD == GIGABEAT_PAD)
#define BTN_QUIT BUTTON_POWER
#define BTN_RIGHT BUTTON_RIGHT
#define BTN_UP BUTTON_UP
#define BTN_DOWN BUTTON_DOWN
#elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \
(CONFIG_KEYPAD == SANSA_C200_PAD)
#define BTN_QUIT BUTTON_POWER
#define BTN_RIGHT BUTTON_RIGHT
#define BTN_UP BUTTON_UP
#define BTN_DOWN BUTTON_DOWN
#elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD
#define BTN_QUIT BUTTON_POWER
#define BTN_RIGHT BUTTON_RIGHT
#define BTN_UP BUTTON_UP
#define BTN_DOWN BUTTON_DOWN
#elif CONFIG_KEYPAD == IRIVER_H10_PAD
#define BTN_QUIT BUTTON_POWER
#define BTN_RIGHT BUTTON_RIGHT
#define BTN_UP BUTTON_SCROLL_UP
#define BTN_DOWN BUTTON_SCROLL_DOWN
#endif
#define FRACTSIZE 10
#ifndef SIMULATOR
#if (HW_SAMPR_CAPS & SAMPR_CAP_22)
#define SAMPLE_RATE SAMPR_22 // 44100 22050 11025
#else
#define SAMPLE_RATE SAMPR_44 // 44100 22050 11025
#endif
#define MAX_VOICES 20 // Note: 24 midi channels is the minimum general midi
// spec implementation
#else // Simulator requires 44100, and we can afford to use more voices
#define SAMPLE_RATE SAMPR_44
#define MAX_VOICES 48
#endif
#define BUF_SIZE 256
#define NBUF 2
#undef SYNC
#ifdef SIMULATOR
#define SYNC
#endif
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"
long gmbuf[BUF_SIZE*NBUF];
int quit=0;
struct plugin_api * rb;
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
int retval = 0;
PLUGIN_IRAM_INIT(api)
rb = api;
if(parameter == NULL)
{
rb->splash(HZ*2, " Play .MID file ");
return PLUGIN_OK;
}
rb->lcd_setfont(0);
#if defined(HAVE_ADJUSTABLE_CPU_FREQ)
rb->cpu_boost(true);
#endif
printf("%s", parameter);
/* rb->splash(HZ, true, parameter); */
#ifdef RB_PROFILE
rb->profile_thread();
#endif
retval = midimain(parameter);
#ifdef RB_PROFILE
rb->profstop();
#endif
rb->pcm_play_stop();
rb->pcm_set_frequency(HW_SAMPR_DEFAULT);
#if defined(HAVE_ADJUSTABLE_CPU_FREQ)
rb->cpu_boost(false);
#endif
rb->splash(HZ, "FINISHED PLAYING");
if(retval == -1)
return PLUGIN_ERROR;
return PLUGIN_OK;
}
bool swap=0;
bool lastswap=1;
inline void synthbuf(void)
{
long *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) << 16) | (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.
}
#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 notesUsed = 0;
int a=0;
printf("Loading file");
mf= loadFile(filename);
if(mf == NULL)
{
printf("Error loading file.");
return -1;
}
if (initSynth(mf, ROCKBOX_DIR "/patchset/patchset.cfg",
ROCKBOX_DIR "/patchset/drums.cfg") == -1)
return -1;
//#ifndef SIMULATOR
rb->pcm_play_stop();
#if INPUT_SRC_CAPS != 0
/* Select playback */
rb->audio_set_input_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK);
rb->audio_set_output_source(AUDIO_SRC_PLAYBACK);
#endif
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. On a laptop, anyway.
*/
printf("Okay, starting sequencing");
bpm=mf->div*1000000/tempo;
numberOfSamples=SAMPLE_RATE/bpm;
/* Skip over any junk in the beginning of the file, so start playing */
/* after the first note event */
do
{
notesUsed = 0;
for(a=0; a<MAX_VOICES; a++)
if(voices[a].isUsed == 1)
notesUsed++;
tick();
} while(notesUsed == 0);
synthbuf();
//#ifndef SIMULATOR
rb->pcm_play_data(&get_more, NULL, 0);
//#endif
int vol=0;
while(!quit)
{
#ifndef SYNC
synthbuf();
#endif
rb->yield();
/* Prevent idle poweroff */
rb->reset_poweroff_timer();
/* Code taken from Oscilloscope plugin */
switch(rb->button_get(false))
{
case BTN_UP:
case BTN_UP | BUTTON_REPEAT:
vol = rb->global_settings->volume;
if (vol < rb->sound_max(SOUND_VOLUME))
{
vol++;
rb->sound_set(SOUND_VOLUME, vol);
rb->global_settings->volume = vol;
}
break;
case BTN_DOWN:
case BTN_DOWN | BUTTON_REPEAT:
vol = rb->global_settings->volume;
if (vol > rb->sound_min(SOUND_VOLUME))
{
vol--;
rb->sound_set(SOUND_VOLUME, vol);
rb->global_settings->volume = vol;
}
break;
case BTN_RIGHT:
{
/* Skip 3 seconds */
/* Should skip length be retrieved from the RB settings? */
int samp = 3*SAMPLE_RATE;
int tickCount = samp / numberOfSamples;
int a=0;
for(a=0; a<tickCount; a++)
tick();
break;
}
#ifdef BTN_RC_QUIT
case BTN_RC_QUIT:
#endif
case BTN_QUIT:
quit=1;
}
}
return 0;
}
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