mnu2txt.c

VS1000B的应用文档,很好启发.大家可以

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

//#define OLD_FORMAT
typedef unsigned char ubyte;

struct ENTRY {
    ubyte parent[2];        /*0 parent index:  0 or 1..65535 */
    ubyte subtree[2];       /*1 subtree index: 0 or 1..65535 */
    ubyte extra;            /*2 number of extra files to play */
    ubyte flags;            /*2 flags for this entry */
#ifdef OLD_FORMAT
    ubyte name[42];         /*3 entry name (for display) */
#else
    ubyte fileName[8];      /*28 FAT short filename, .ogg implied */
#endif
    ubyte startFraction[2]; /*24 clip start position, x/65536 seconds */
    ubyte startSeconds[2];  /*25 clip start position, seconds */
    ubyte endFraction[2];   /*26 clip end position, x/65536 seconds */
    ubyte endSeconds[2];    /*27 clip end position, seconds */
#ifdef OLD_FORMAT
    ubyte fileName[8];      /*28 FAT short filename, .ogg implied */
#else
    ubyte name[42];         /*3 entry name (for display) */
#endif
};
#define MFLG_LAST  1 /* last entry */
#define MFLG_FIRST 2 /* first entry */
#define MFLG_USEENDTIME 4 /* play only to the specified end time */
#define MFLG_ENDPLAY 8 /* end of leaf entries, stop playing */

struct MenuTemp;
struct MenuTemp {
    char menuName[80];
    //ubyte parent[2];        /*(0 parent index:  0 or 1..65535) */
    //ubyte subtree[2];       /*1 subtree index: 0 or 1..65535 */
    char subMenu[80];
    int subTree;
    int parent;
    ubyte extra;            /*2 number of extra files to play */
    ubyte flags;            /*2 flags for this entry */
    ubyte name[80];         /*3 entry name (for display) */
    double startTime;
    double endTime;
    ubyte fileName[80];      /*28 FAT short filename, .ogg implied */
};

struct MenuTemp menuTemp[65536] = {0};
int menuTempNum = 0;

int main(int argc, char *argv[]) {
    FILE *fp = fopen((argc > 1) ? argv[1] : "menu.mnu", "rb");
    long sz, l;
    struct ENTRY *e, *c;
    int cnt;
    if (!fp) {
	fprintf(stderr, "Could not open menu.mnu for reading\n");
	exit(10);
    }

    fseek(fp, 0, SEEK_END);
    sz = ftell(fp);
    fseek(fp, 0, SEEK_SET);
    if ((e = malloc(sz))) {
	fread(e, 1, sz, fp);
    } else {
	fprintf(stderr, "allocation of %ld failed\n", sz);
    }
    fclose(fp);

    /* fix parent references if they are not present */
    c = e;
    cnt = 0;
    for (l=0;l<sz;l+=sizeof(struct ENTRY)) {
	int sub = (c->subtree[0]<<8) | c->subtree[1];
	if (sub) {
	    struct ENTRY *m = &e[sub];
	    while ((char *)m < (char *)e+sz) {
		m->parent[0] = cnt>>8;
		m->parent[1] = cnt&255;
		if ((m->flags & MFLG_LAST))
		    break;
		m++;
	    }
	}
	cnt++;
	c++;
    }

    c = e;
    for (l=0;l<sz;l+=sizeof(struct ENTRY)) {
	if (c->flags & MFLG_FIRST) {
	    if (l==0) {
		printf("--main menu--\n");
	    } else {
		int parent = (c->parent[0]<<8) | c->parent[1];
		struct ENTRY *m = &e[parent];
		printf("--%s--\n", m->name);
	    }
	}
	{
	    int sub = (c->subtree[0]<<8) | c->subtree[1];
	    long t;
	    int times = 1;
	    char fileName[9];
	    strncpy(fileName, c->fileName, 8);
	    fileName[8] = 0;
	    printf("\"%s\"", c->name);
	    if (fileName[0] == ':') {
		printf(" bookmark %d", (c->fileName[2]<<8) | c->fileName[3]);
		times = 0;
	    } else if (c->fileName[0] == '!') {
		printf(" timer %d", (c->fileName[2]<<8) | c->fileName[3]);
		times = 0;
	    } else {
		if (sub) {
		    if (c->flags & MFLG_USEENDTIME) {
			printf(" entry \"%s\"", e[sub].name);
		    } else {
			printf(" submenu \"%s\"", c->name);
			times = 0;
		    }
		    if (c->fileName[0])
			printf(" autoplay");
		} else if (c->fileName[0]) {
		    printf(" file \"%s\"", fileName);
		}
	    }
	    if (times) {
		t = (c->startFraction[0]<<8) | c->startFraction[1];
		t |= ((c->startSeconds[0]<<8) | c->startSeconds[1])<<16;
//printf(" %d %d", c->startSeconds[0], c->startSeconds[1]);
		printf(" %8.3f", t / 65536.0);
		t = (c->endFraction[0]<<8) | c->endFraction[1];
		t |= ((c->endSeconds[0]<<8) | c->endSeconds[1])<<16;
		if (t == 0x7fffffff) {
		    printf(" end");
		} else {
		    printf(" %8.3f", t / 65536.0);
		}
		if ((c->flags & MFLG_USEENDTIME) && sub == 0) {
		    printf(" useend");
		}
	    }
	    printf("\n");
	}
	c++;
    }
    printf("--end--\n");
    return 0;
}