C++ (Cpp) pe_cache_seek Examples

Example #1

File: plugin_gif.c Project: alkap007/ali3606

static int gif_seek_data(UINT32 fh,long offset, UINT32 origin)
{
#ifdef ENABLE_PE_CACHE
    if(gif_cache_id >= 0)
    {
        pe_cache_seek(gif_cache_id, (off_t)offset, origin);
        return 0;
    }
#endif

#ifndef ENABLE_PE_CACHE
	FILE *fp = (FILE*)fh;

	if(fp == NULL)
	{
		return -1;
	}

	fseek(fp, (off_t)offset, origin);
#endif
	return 0;
}

Example #2

File: ogg_36.c Project: Janesak1977/ali3602

static int ogg_get_song_info(char *filename, MusicInfo *music_info)
{
	int														status = 3;
	FILE														*file;
	unsigned long												file_length;
	int														bitrate;
	double													song_time;
	OggVorbis_File											temp_ogg;
		
	PE_DBG_PRINTF("MusicEngine: ==> ogg_get_song_info()! \n");
	
	
	if ((!filename) || (!music_info) || (!ogg_file))
	{
		PE_DBG_PRINTF("MusicEngine: ogg_get_song_info() invalid parameter filename or music_info or ogg_file!\n");
		return -1;
	}

#ifndef ENABLE_PE_CACHE
	file = fopen(filename, "rb");               // get_song_info打开文件
	if (!file)
	{
		PE_DBG_PRINTF("MusicEngine: ogg_get_song_info() fopen failed! \n");
		return -1;
	}

	fseek(file, 0, SEEK_END);   
	file_length = ftell(file);
	music_info->file_length = file_length;
	fseek(file, 0, SEEK_SET);
#else
    ogg_info_cache_id = pe_cache_open(filename, NULL, OGG_CACHE_SIZE, OGG_BLOCK_SIZE);
    if (0 > ogg_info_cache_id)
    {
        libc_printf("<%d><%s> pe_cache_open failed!\n", __LINE__, __FUNCTION__);
        return -1;
    }
    file = (FILE *)(((UINT32)ogg_info_cache_id | PE_CACHE_ID_TAG));
    pe_cache_seek(ogg_info_cache_id, 0, SEEK_END);
    file_length = pe_cache_tell(ogg_info_cache_id);
    music_info->file_length = file_length;
    pe_cache_seek(ogg_info_cache_id, 0, SEEK_SET);
#endif
	if(ov_open(file, &temp_ogg, NULL, 0) < 0)       // 如果这里紧跟着调用ov的函数,则里面的文件系统函数都是stdio,不是pe_cache
	{
		PE_DBG_PRINTF("Input does not appear to be an Ogg bitstream.\n");
#ifndef ENABLE_PE_CACHE
        fclose(file);
#else
        pe_cache_close(ogg_info_cache_id);
		ogg_info_cache_id = -1;
#endif
 		return -1;
	}
	song_time = ov_time_total(&temp_ogg, -1);
	if (song_time < 0)
	{
		PE_DBG_PRINTF("Can not get song time from Ogg bitstream.\n");
		song_time = 0;		
	}

	music_info->time = song_time / 1000;

	ov_clear(&temp_ogg);                            // get_song_info完毕,在这里close文件

	PE_DBG_PRINTF("MusicEngine: <== ogg_get_song_info()! \n");
	return status;

}