#include <stdlib.h>#include <string.h>#include "fb.h"#include "input.h"#include "rc.h"#include "pcm.h"#include "thinlib.h"struct pcm pcm;static byte *backbuf;static volatile int audio_int;static int samplerate = 44100;static int sound = 1;static int stereo = 0;struct fb fb;static bitmap_t *screen = NULL;static int vmode[3] = { 320, 200, 8 };rcvar_t vid_exports[] = {	RCV_VECTOR("vmode", vmode, 3),	RCV_END};rcvar_t pcm_exports[] ={	RCV_BOOL("sound", &sound),	RCV_INT("samplerate", &samplerate),	RCV_INT("stereo", &stereo),	RCV_END};/* hardware audio buffer fill */static void _audio_callback(void *buf, int len){	memcpy(buf, backbuf, len);	audio_int = 1;}void pcm_init(){	thinsound_t params;	if (!sound)	{		pcm.hz = 11025;		pcm.len = 4096;		pcm.buf = (byte *) malloc(pcm.len);		pcm.pos = 0;		pcm.stereo = stereo;		return;	}	params.sample_rate = samplerate;	params.frag_size = samplerate / 60;	params.format = THIN_SOUND_8BIT;	if (stereo)		params.format |= THIN_SOUND_STEREO;	else		params.format |= THIN_SOUND_MONO;	params.callback = _audio_callback;	if (thin_sound_init(&params))	{		sound = 0;		return;	}	pcm.hz = params.sample_rate;	pcm.len = params.frag_size;	pcm.stereo = (params.format & THIN_SOUND_STEREO) ? 1 : 0;	pcm.buf = (byte *) malloc(pcm.len);	if (!pcm.buf)		die("failed to allocate sound buffer\n");	memset(pcm.buf, 0, pcm.len);	pcm.pos = 0;	backbuf = (byte *) malloc(pcm.len);	if (!backbuf)		die("failed to allocate sound backbuffer\n");	memset(backbuf, 0, pcm.len);	thin_sound_start();}void pcm_close(){	if (sound)	{		thin_sound_stop();		thin_shutdown();	}	if (pcm.buf)		free(pcm.buf);	if (backbuf)		free(backbuf);	backbuf = 0;	memset(&pcm, 0, sizeof pcm);}int pcm_submit(){	if (!sound)	{		pcm.pos = 0;		return 0;	}	if (pcm.pos < pcm.len)		return 1;	while (!audio_int)		; /* spin */	memcpy(backbuf, pcm.buf, pcm.len);	audio_int = 0;	pcm.pos = 0;	return 1;}/* keyboard stuff... *//* keymap - mappings of the form { scancode, localcode } - from keymap.c */extern int keymap[][2];/* TODO: this is terrible. */static int mapscancode(int scan){	int i;	for (i = 0; keymap[i][0]; i++)		if (keymap[i][0] == scan)			return keymap[i][1];	return 0;}void ev_poll(){	int i;	keydata_t *key;	event_t ev;		key = thin_key_dequeue();	while (key)	{		ev.type = key->signal ? EV_PRESS : EV_RELEASE;		ev.code = mapscancode(key->key);		ev_postevent(&ev);		key = thin_key_dequeue();	}}void vid_preinit(){}void vid_init(){	int red_length, green_length, blue_length;	int red_offset, green_offset, blue_offset;	int gotmask = thin_init(THIN_VIDEO | THIN_SOUND | THIN_KEY);	if ((THIN_VIDEO | THIN_KEY) != (gotmask & (THIN_VIDEO | THIN_KEY)))		die("thinlib initialization failed.");	thin_key_set_repeat(false);	/* don't spam the graphics screen if we don't have soundcard */	thin_setlogfunc(NULL);	if (thin_vid_init(vmode[0], vmode[1], vmode[2]))		die("could not set video mode");	screen = thin_vid_lockwrite();	if (NULL == screen)		die("could not get ahold of video surface");	fb.w = screen->width;	fb.h = screen->height;	fb.pitch = screen->pitch;	fb.ptr = screen->data;	fb.pelsize = (screen->bpp + 7) / 8;	fb.indexed = (screen->bpp == 8) ? 1 : 0;	switch (screen->bpp)	{	case 8:		red_length = 0;		green_length = 0;		blue_length = 0;		red_offset = 0;		green_offset = 0;		blue_offset = 0;		break;	case 16:		red_length = 5;		green_length = 6;		blue_length = 5;		red_offset = 11;		green_offset = 5;		blue_offset = 0;		break;	case 32:		red_length = 8;		green_length = 8;		blue_length = 8;		red_offset = 16;		green_offset = 8;		blue_offset = 0;		break;	case 15:	case 24:	default:		die("i don't know what to do with %dbpp mode", screen->bpp);		break;	}	fb.cc[0].r = 8 - red_length;	fb.cc[1].r = 8 - green_length;	fb.cc[2].r = 8 - blue_length;	fb.cc[0].l = red_offset;	fb.cc[1].l = green_offset;	fb.cc[2].l = blue_offset;	fb.enabled = 1;	fb.dirty = 0;}void vid_close(){	fb.enabled = 0;	thin_shutdown();}void vid_settitle(char *title){}void vid_setpal(int i, int r, int g, int b){	rgb_t color;	color.r = r;	color.g = g;	color.b = b;	thin_vid_setpalette(&color, i, 1);}void vid_begin(){	screen = thin_vid_lockwrite();	fb.ptr = screen->data;	fb.pitch = screen->pitch;	fb.w = screen->width;	fb.h = screen->height;}void vid_end(){	thin_vid_freewrite(-1, NULL);}