lyric_parse.c

智原mp3 SDK 开发包 与巨力 有mp3 wma ogg decoder

/*
 *      lyric_parse.c
 *
 *      Lyrics parse program
 *
 *              Copyright (c) FARADAY, All Right Reserved 2007
 *
 *      Created by:     K.J. Lin <[e-mail]>
 *
 */
#include <string.h>
#include "api.h"
#include "lrc_parser.h"

UINT8 lyric[MAX_LYRIC_WORD];
UINT8 *seg2lrc[MAX_LYRIC_SEGMENT];
UINT8 time2seg[MAX_MUSIC_LENGTH];

UINT8 remains;
BOOLEAN eof;

UINT8 line_buf[128];
UINT8 tmp[16], tmp_pos;
UINT16 time[10];
UINT8 time_count;

FILE_t *fp;

static UINT16 parse_time(UINT8 xdata *buf)
{	
	return ((buf[0]-'0')*10 + (buf[1]-'0'))*60 + (buf[3]-'0')*10 + (buf[4]-'0');
}

static BOOLEAN get_line(UINT8 xdata *buf)
{
	UINT8 data tok;
	
	while(!eof) {
		if(remains == 0) {
			remains = api_u16FileRead(tmp, sizeof(tmp), fp);
			tmp_pos = 0;
			if(remains != sizeof(tmp))
				eof = true;
		}
		
		while(remains) {
			remains--;
			tok = tmp[tmp_pos++];
			if(tok == 0x0D)
				continue;
			else if(tok == 0x0A) {
				*buf = '\0';
				return true;
			}
			else
				*buf++ = tok;
		}
	}

	return FALSE;
}

static BOOLEAN get_time(UINT8 xdata * xdata *buf)
{
	UINT8 tok, n;
	UINT8 timetok[9];
	BOOLEAN find = false;
	
	n = 0;
	while((tok = *((*buf)++)) != '\0') {
		if(tok == '[') {
			find = true;
		}
		else if(tok == ']') {
			if(!find)
				return false;
			timetok[n++] = '\0';
			if(timetok[0]>='0' && timetok[0]<='9'&&timetok[1]>='0' && timetok[1]<='9'&&timetok[3]>='0' && timetok[3]<='9'&&timetok[4]>='0' && timetok[4]<='9')
			{
				time[time_count++] = parse_time(timetok);			
				if(**buf != '[')
					return true;
				
				n = 0;
				find = false;
			}
			else
			{
				return false;	
			}	
		}
		else {
			timetok[n++] = tok;
		}
	}
	
	return false;
}

BOOLEAN lyric_parse(UINT8 *filename)
{
	UINT8 tok, i;
	UINT8 data segment;
	UINT8  xdata *buf,*buf1;
	UINT8  xdata *plyric;
	
	memset(time2seg, 0xFF, MAX_MUSIC_LENGTH);
	
	fp = NULL;
	if((fp = api_pFileOpen(filename)) == NULL)
		return false;
	
	remains = 0;
	segment = 0;
	tmp_pos = 0;
	eof = false;
	plyric = lyric;
	while(get_line(line_buf)) {
		time_count = 0;
		buf = line_buf;
		//Print(line_buf);
		if(get_time(&buf) == true) {
			for(i = 0; i < time_count; i++)
				time2seg[time[i]] = segment;
			buf1 = plyric;
			
			//seg2lrc[segment] = (UINT16)plyric;
			//Print(buf);
			while((tok = *buf++) != '\0')
				*plyric++ = tok;				
			*plyric++ = '\0';
			seg2lrc[segment] = buf1;
			//Print(buf1);
			Print(seg2lrc[segment]);
			if(++segment >= MAX_LYRIC_SEGMENT || ((UINT16)plyric - (UINT16)lyric) >= MAX_LYRIC_WORD)
				break;
		}
	}
	
	api_vFileClose(fp);

	return TRUE;
}