settings.c

编译后直接运行的ＭＰ３播放器全部Ｃ语言源代码 一个包含FAT文件系统、系统引导 Boot、FLASH Driver等内容的

            global_settings.playlist_viewer_indices =
                (config_block[0xae] >> 5) & 1;
            global_settings.playlist_viewer_track_display =
                (config_block[0xae] >> 6) & 1;
        }

        if(config_block[0xb0] != 0xff) {
            global_settings.peak_meter_clip_hold = (config_block[0xb0]) & 0x1f;
            global_settings.peak_meter_performance = 
                (config_block[0xb0] & 0x80) != 0;
        }

        if(config_block[0xb1] != 0xff) {
            global_settings.peak_meter_release = config_block[0xb1] & 0x7f;
            global_settings.peak_meter_dbfs = (config_block[0xb1] & 0x80) != 0;
        }

        if(config_block[0xb2] != 0xff)
            global_settings.peak_meter_min = config_block[0xb2];
        
        if(config_block[0xb3] != 0xff)
            global_settings.peak_meter_max = config_block[0xb3];

        if(config_block[0xb4] != 0xff)
            global_settings.battery_capacity = config_block[0xb4]*50 + 1000;

        if (config_block[0xb5] != 0xff)
            global_settings.scroll_step = config_block[0xb5];

        if (config_block[0xb6] != 0xff)
            global_settings.scroll_delay = config_block[0xb6];

        if (config_block[0xb7] != 0xff)
            global_settings.bidir_limit = config_block[0xb7];

       if (config_block[0xac] != 0xff)
            global_settings.max_files_in_dir =
                config_block[0xac] | (config_block[0xad] << 8);

        if (config_block[0xaa] != 0xff)
            global_settings.max_files_in_playlist =
                config_block[0xaa] | (config_block[0xab] << 8);

        strncpy(global_settings.wps_file, &config_block[0xb8], MAX_FILENAME);
        strncpy(global_settings.lang_file, &config_block[0xcc], MAX_FILENAME);
        strncpy(global_settings.font_file, &config_block[0xe0], MAX_FILENAME);

        if (config_block[0xf4] != 0xff) {
            global_settings.rec_prerecord_time = config_block[0xf4] & 0x1f;
            global_settings.rec_directory = (config_block[0xf4] >> 5) & 3;
        }
        
#ifdef HAVE_LCD_CHARCELLS
        if (config_block[0xa8] != 0xff)
            global_settings.jump_scroll = config_block[0xa8];
        if (config_block[0xa9] != 0xff)
            global_settings.jump_scroll_delay = config_block[0xa9];
#endif
        if(config_block[0xaf] != 0xff) {
            global_settings.usemrb = (config_block[0xaf] >> 5) & 3;
            global_settings.autocreatebookmark = (config_block[0xaf] >> 2) & 7;
            global_settings.autoloadbookmark = (config_block[0xaf]) & 3;
        }
    }

    settings_apply();
}

/* parse a line from a configuration file. the line format is: 

   setting name: setting value

   Any whitespace before setting name or value (after ':') is ignored.
   A # as first non-whitespace character discards the whole line.
   Function sets pointers to null-terminated setting name and value.
   Returns false if no valid config entry was found.
*/

static bool settings_parseline(char* line, char** name, char** value)
{
    char* ptr;

    while ( isspace(*line) )
        line++;

    if ( *line == '#' )
        return false;

    ptr = strchr(line, ':');
    if ( !ptr )
        return false;

    *name = line;
    *ptr = 0;
    ptr++;
    while (isspace(*ptr))
        ptr++;
    *value = ptr;
    return true;
}

void set_file(char* filename, char* setting, int maxlen)
{
    char* fptr = strrchr(filename,'/');
    int len;
    int extlen = 0;
    char* ptr;

    if (!fptr)
        return;

    *fptr = 0;
    fptr++;

    len = strlen(fptr);
    ptr = fptr + len;
    while (*ptr != '.') {
        extlen++;
        ptr--;
    }
        
    if (strncmp(ROCKBOX_DIR, filename ,strlen(ROCKBOX_DIR)) ||
        (len-extlen > maxlen))
        return;
        
    strncpy(setting, fptr, len-extlen);
    setting[len-extlen]=0;

    settings_save();
}

static void set_sound(char* value, int type, int* setting)
{
    int num = atoi(value);

    num = mpeg_phys2val(type, num);

    if ((num > mpeg_sound_max(type)) ||
        (num < mpeg_sound_min(type)))
    {
        num = mpeg_sound_default(type);
    }

    *setting = num;
    mpeg_sound_set(type, num);

#ifdef HAVE_MAS3507D
    /* This is required to actually apply balance */
    if (SOUND_BALANCE == type)
        mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
#endif
}

static void set_cfg_bool(bool* variable, char* value)
{
    /* look for the 'n' in 'on' */
    if ((value[1] & 0xdf) == 'N') 
        *variable = true;
    else
        *variable = false;
}

static void set_cfg_int(int* variable, char* value, int min, int max )
{
    *variable = atoi(value);

    if (*variable < min)
        *variable = min;
    else
        if (*variable > max)
            *variable = max;
}

static void set_cfg_option(int* variable, char* value,
                           char* options[], int numoptions )
{
    int i;

    for (i=0; i<numoptions; i++) {
        if (!strcasecmp(options[i], value)) {
            *variable = i;
            break;
        }
    }
}

bool settings_load_config(char* file)
{
    int fd;
    char line[128];

    fd = open(file, O_RDONLY);
    if (fd < 0)
        return false;

    while (read_line(fd, line, sizeof line) > 0)
    {
        char* name;
        char* value;

        if (!settings_parseline(line, &name, &value))
            continue;

        if (!strcasecmp(name, "volume"))
            set_sound(value, SOUND_VOLUME, &global_settings.volume);
        else if (!strcasecmp(name, "bass"))
            set_sound(value, SOUND_BASS, &global_settings.bass);
        else if (!strcasecmp(name, "treble"))
            set_sound(value, SOUND_TREBLE, &global_settings.treble);
        else if (!strcasecmp(name, "balance"))
            set_sound(value, SOUND_BALANCE, &global_settings.balance);
        else if (!strcasecmp(name, "channels")) {
            static char* options[] = {
                "stereo","stereo narrow","mono","mono left",
                "mono right","karaoke","stereo wide"};
            set_cfg_option(&global_settings.channel_config, value,
                           options, 7);
        }
        else if (!strcasecmp(name, "wps")) {
            if (wps_load(value,false))
                set_file(value, global_settings.wps_file, MAX_FILENAME);
        }
        else if (!strcasecmp(name, "lang")) {
            if (!lang_load(value))
                set_file(value, global_settings.lang_file, MAX_FILENAME);
        }
        else if (!strcasecmp(name, "bidir limit"))
            set_cfg_int(&global_settings.bidir_limit, value, 0, 200);
#ifdef HAVE_LCD_BITMAP
        else if (!strcasecmp(name, "font")) {
            if (font_load(value))
                set_file(value, global_settings.font_file, MAX_FILENAME);
        }
        else if (!strcasecmp(name, "scroll step"))
            set_cfg_int(&global_settings.scroll_step, value, 1, LCD_WIDTH);
        else if (!strcasecmp(name, "statusbar"))
            set_cfg_bool(&global_settings.statusbar, value);
        else if (!strcasecmp(name, "peak meter release"))
            set_cfg_int(&global_settings.peak_meter_release, value, 1, 0x7e);
        else if (!strcasecmp(name, "peak meter hold")) {
            static char* options[] = {
                "off","200ms","300ms","500ms",
                "1","2","3","4","5","6","7","8","9","10",
                "15","20","30","1min"};
            set_cfg_option(&global_settings.peak_meter_hold, value,
                           options, 18);
        }
        else if (!strcasecmp(name, "peak meter clip hold")) {
            static char* options[] = {
                "on","1","2","3","4","5","6","7","8","9","10",
                "15","20","25","30","45","60","90",
                "2min","3min","5min","10min","20min","45min","90min"};
            set_cfg_option(&global_settings.peak_meter_clip_hold, value,
                           options, 25);
        }
        else if (!strcasecmp(name, "peak meter dbfs"))
            set_cfg_bool(&global_settings.peak_meter_dbfs, value);
        else if (!strcasecmp(name, "peak meter min"))
            set_cfg_int(&global_settings.peak_meter_min, value, 0, 100);
        else if (!strcasecmp(name, "peak meter max"))
            set_cfg_int(&global_settings.peak_meter_max, value, 0, 100);
        else if (!strcasecmp(name, "peak meter busy"))
            set_cfg_bool(&global_settings.peak_meter_performance, value);
        else if (!strcasecmp(name, "volume display")) {
            static char* options[] = {"graphic", "numeric"};
            set_cfg_option(&global_settings.volume_type, value, options, 2);
        }
        else if (!strcasecmp(name, "battery display")) {
            static char* options[] = {"graphic", "numeric"};
            set_cfg_option(&global_settings.battery_type, value, options, 2);
        }
        else if (!strcasecmp(name, "time format")) {
            static char* options[] = {"24hour", "12hour"};
            set_cfg_option(&global_settings.timeformat, value, options, 2);
        }
        else if (!strcasecmp(name, "scrollbar"))
            set_cfg_bool(&global_settings.scrollbar, value);
        else if (!strcasecmp(name, "invert"))
            set_cfg_bool(&global_settings.invert, value);
        else if (!strcasecmp(name, "flip display"))
            set_cfg_bool(&global_settings.flip_display, value);
        else if (!strcasecmp(name, "invert cursor"))
            set_cfg_bool(&global_settings.invert_cursor, value);
        else if (!strcasecmp(name, "show icons"))
            set_cfg_bool(&global_settings.show_icons, value);
#endif
        else if (!strcasecmp(name, "caption backlight"))
            set_cfg_bool(&global_settings.caption_backlight, value);
        else if (!strcasecmp(name, "shuffle"))
            set_cfg_bool(&global_settings.playlist_shuffle, value);
        else if (!strcasecmp(name, "repeat")) {
            static char* options[] = {"off", "all", "one"};
            set_cfg_option(&global_settings.repeat_mode, value, options, 3);
        }
        else if (!strcasecmp(name, "resume")) {
            static char* options[] = {"off", "ask", "ask once", "on"};
            set_cfg_option(&global_settings.resume, value, options, 4);
        }
        else if (!strcasecmp(name, "sort case"))
            set_cfg_bool(&global_settings.sort_case, value);
        else if (!strcasecmp(name, "show files")) {
            static char* options[] = {"all", "supported","music", "playlists"};
            set_cfg_option(&global_settings.dirfilter, value, options, 4);
        }
        else if (!strcasecmp(name, "follow playlist"))
            set_cfg_bool(&global_settings.browse_current, value);
        else if (!strcasecmp(name, "play selected"))
            set_cfg_bool(&global_settings.play_selected, value);
        else if (!strcasecmp(name, "contrast"))
            set_cfg_int(&global_settings.contrast, value,
                        MIN_CONTRAST_SETTING, MAX_CONTRAST_SETTING);
        else if (!strcasecmp(name, "scroll speed"))
            set_cfg_int(&global_settings.scroll_speed, value, 1, 10);
        else if (!strcasecmp(name, "scan min step")) {
            static char* options[] =
                {"1","2","3","4","5","6","8","10",
                 "15","20","25","30","45","60"};
            set_cfg_option(&global_settings.ff_rewind_min_step, value,
                           options, 14);
        }
        else if (!strcasecmp(name, "scan accel"))
            set_cfg_int(&global_settings.ff_rewind_accel, value, 0, 15);
        else if (!strcasecmp(name, "scroll delay"))
            set_cfg_int(&global_settings.scroll_delay, value, 0, 250);
        else if (!strcasecmp(name, "backlight timeout")) {
            static char* options[] = {
                "off","on","1","2","3","4","5","6","7","8","9",
                "10","15","20","25","30","45","60","90"};
            set_cfg_option(&global_settings.backlight_timeout, value,
                           options, 19);
        }
        else if (!strcasecmp(name, "backlight when plugged"))
            set_cfg_bool(&global_settings.backlight_on_when_charging, value);
        else if (!strcasecmp(name, "antiskip"))
            set_cfg_int(&global_settings.buffer_margin, value, 0, 7);
        else if (!strcasecmp(name, "disk spindown"))
            set_cfg_int(&global_settings.disk_spindown, value, 3, 254);
#ifdef HAVE_ATA_POWER_OFF
        else if (!strcasecmp(name, "disk poweroff"))
            set_cfg_bool(&global_settings.disk_poweroff, value);
#endif
#ifdef HAVE_MAS3587F
        else if (!strcasecmp(name, "loudness"))
            set_sound(value, SOUND_LOUDNESS, &global_settings.loudness);
        else if (!strcasecmp(name, "bass boost"))
            set_sound(value, SOUND_SUPERBASS, &global_settings.bass_boost);
        else if (!strcasecmp(name, "auto volume")) {
            static char* options[] = {"off", "2", "4", "8" };
            set_cfg_option(&global_settings.avc, value, options, 4);
        }
        else if (!strcasecmp(name, "rec mic gain"))
            set_sound(value, SOUND_MIC_GAIN, &global_settings.rec_mic_gain);
        else if (!strcasecmp(name, "rec left gain"))
            set_sound(value, SOUND_LEFT_GAIN, &global_settings.rec_left_gain);
        else if (!strcasecmp(name, "rec right gain"))
            set_sound(value, SOUND_RIGHT_GAIN, &global_settings.rec_right_gain);
        else if (!strcasecmp(name, "rec quality"))
            set_cfg_int(&global_settings.rec_quality, value, 0, 7);
        else if (!strcasecmp(name, "rec timesplit")){
            static char* options[] = {"off", "00:05","00:10","00:15",
                                      "00:30","01:00","02:00","04:00",
                                      "06:00","08:00","10:00","12:00",
                                      "18:00","24:00"};
            set_cfg_option(&global_settings.rec_timesplit, value, 
                           options, 14);
        }
        else if (!strcasecmp(name, "rec source")) {
            static char* options[] = {"mic", "line", "spdif"};