radio.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

                break;
        }

        peak_meter_peek();

        if(!screen_freeze)
        {
            lcd_setmargins(0, 8);
            
            /* Only display the peak meter when not recording */
            if(!mpeg_status())
            {
                lcd_clearrect(0, 8 + fh*(top_of_screen + 3), LCD_WIDTH, fh);
                peak_meter_draw(0, 8 + fh*(top_of_screen + 3), LCD_WIDTH, fh);
                lcd_update_rect(0, 8 + fh*(top_of_screen + 3), LCD_WIDTH, fh);
            }
            
            if(TIME_AFTER(current_tick, timeout))
            {
                timeout = current_tick + HZ;
                
                val = fmradio_read(3);
                stereo = (val & 0x100000)?true:false;
                if(stereo != last_stereo_status)
                {
                    update_screen = true;
                    last_stereo_status = stereo;
                }
            }
            
            seconds = mpeg_recorded_time() / HZ;
            
            if(update_screen || seconds > last_seconds)
            {
                last_seconds = seconds;
                
                lcd_setfont(FONT_UI);
                
                if(curr_preset >= 0)
                {
                    lcd_puts_scroll(0, top_of_screen,
                                    presets[curr_preset].name);
                }
                else
                {
                    lcd_clearrect(0, 8 + top_of_screen*fh, LCD_WIDTH, fh);
                }
                
                freq = curr_freq / 100000;
                snprintf(buf, 128, str(LANG_FM_STATION), freq / 10, freq % 10);
                lcd_puts(0, top_of_screen + 1, buf);
                
                snprintf(buf, 128,
                         stereo?str(LANG_CHANNEL_STEREO):
                         str(LANG_CHANNEL_MONO));
                lcd_puts(0, top_of_screen + 2, buf);

                if(mpeg_status() == MPEG_STATUS_RECORD)
                {
                    hours = seconds / 3600;
                    minutes = (seconds - (hours * 3600)) / 60;
                    snprintf(buf, 32, "%s %02d:%02d:%02d",
                             str(LANG_RECORDING_TIME),
                             hours, minutes, seconds%60);
                    lcd_puts(0, top_of_screen + 3, buf);
                }
                else
                {
                    snprintf(buf, 32, "%s %02d",
                             str(LANG_RECORD_PRERECORD), seconds%60);
                    lcd_puts(0, top_of_screen + 3, buf);
                }
                
                /* Only force the redraw if update_screen is true */
                status_draw(update_screen);
                
                buttonbar_draw();
                
                lcd_update();
                
                update_screen = false;
            }
        }

        if(mpeg_status() & MPEG_STATUS_ERROR)
        {
            done = true;
        }
    }

    
    if(mpeg_status() & MPEG_STATUS_ERROR)
    {
        status_set_playmode(STATUS_STOP);
        splash(0, true, str(LANG_DISK_FULL));
        status_draw(true);
        lcd_update();
        mpeg_error_clear();

        while(1)
        {
            button = button_get(true);
            if(button == (BUTTON_OFF | BUTTON_REL))
                break;
        }
    }
    
    mpeg_init_playback();

    mpeg_sound_channel_config(global_settings.channel_config);
    mpeg_sound_set(SOUND_BASS, global_settings.bass);
    mpeg_sound_set(SOUND_TREBLE, global_settings.treble);
    mpeg_sound_set(SOUND_BALANCE, global_settings.balance);
    mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
    mpeg_sound_set(SOUND_LOUDNESS, global_settings.loudness);
    mpeg_sound_set(SOUND_SUPERBASS, global_settings.bass_boost);
    mpeg_sound_set(SOUND_AVC, global_settings.avc);

    fmradio_set_status(0);

    if(keep_playing)
    {
        /* Enable the Left and right A/D Converter */
        mpeg_set_recording_gain(mpeg_sound_default(SOUND_LEFT_GAIN),
                                mpeg_sound_default(SOUND_RIGHT_GAIN), false);
        mas_codec_writereg(6, 0x4000);
    }
    return have_recorded;
}

static bool parseline(char* line, char** freq, char** name)
{
    char* ptr;

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

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

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

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

void radio_save_presets(void)
{
    int fd;
    int i;
    
    fd = creat(default_filename, O_WRONLY);
    if(fd >= 0)
    {
        for(i = 0;i < MAX_PRESETS;i++)
        {
            fprintf(fd, "%d:%s\n", presets[i].frequency, presets[i].name);
        }
        close(fd);
    }
    else
    {
        splash(HZ*2, true, str(LANG_FM_PRESET_SAVE_FAILED));
    }
}

void radio_load_presets(void)
{
    int fd;
    int rc;
    char buf[128];
    char *freq;
    char *name;
    bool done = false;
    int i;

    if(!presets_loaded)
    {
        memset(presets, 0, sizeof(presets));
    
        fd = open(default_filename, O_RDONLY);
        if(fd >= 0)
        {
            i = 0;
            while(!done && i < MAX_PRESETS)
            {
                rc = read_line(fd, buf, 128);
                if(rc > 0)
                {
                    if(parseline(buf, &freq, &name))
                    {
                        presets[i].frequency = atoi(freq);
                        strncpy(presets[i].name, name, 27);
                        presets[i].name[27] = 0;
                        i++;
                    }
                }
                else
                    done = true;
            }
            close(fd);
        }
    }
    presets_loaded = true;
}

bool radio_preset_select(void)
{
    struct menu_items menu[MAX_PRESETS];
    int m, result;
    int i;
    bool reload_dir = false;
    int num_presets;

    if(presets_loaded)
    {
        num_presets = 0;
        
        for(i = 0;i < MAX_PRESETS;i++)
        {
            if(presets[i].frequency)
            {
                menu[num_presets].desc = presets[i].name;
                /* We use the function pointer entry for the preset
                   entry index */
                menu[num_presets++].function = (void *)i;
            }
        }

        if(num_presets)
        {
            /* DIY menu handling, since we want to exit after selection */
            m = menu_init( menu, num_presets );
            result = menu_show(m);
            menu_exit(m);
            if (result == MENU_SELECTED_EXIT)
                return false;
            else if (result == MENU_ATTACHED_USB)
                reload_dir = true;
            
            if (result >= 0)
            {
                i = (int)menu[result].function;
                curr_freq = presets[i].frequency;
                radio_set_frequency(curr_freq);
            }
        }
        else
        {
            splash(HZ*2, true, str(LANG_FM_NO_PRESETS));
        }
    }

    return reload_dir;
}

static bool radio_add_preset(void)
{
    char buf[27];
    int i = find_preset(0);

    if(i >= 0)
    {
        memset(buf, 0, 27);
        
        if (!kbd_input(buf, 27))
        {
            buf[27] = 0;
            strcpy(presets[i].name, buf);
            presets[i].frequency = curr_freq;
            radio_save_presets();
        }
    }
    else
    {
        splash(HZ*2, true, str(LANG_FM_NO_FREE_PRESETS));
    }
    return true;
}

bool radio_delete_preset(void)
{
    struct menu_items menu[MAX_PRESETS];
    int m, result;
    int i;
    bool reload_dir = false;
    int num_presets;

    if(presets_loaded)
    {
        num_presets = 0;
        
        for(i = 0;i < MAX_PRESETS;i++)
        {
            if(presets[i].frequency)
            {
                menu[num_presets].desc = presets[i].name;
                /* We use the function pointer entry for the preset
                   entry index */
                menu[num_presets++].function = (void *)i;
            }
        }
        
        /* DIY menu handling, since we want to exit after selection */
        m = menu_init( menu, num_presets );
        result = menu_show(m);
        menu_exit(m);
        if (result == MENU_SELECTED_EXIT)
            return false;
        else if (result == MENU_ATTACHED_USB)
            reload_dir = true;
        
        if (result >= 0)
        {
            i = (int)menu[result].function;
            presets[i].frequency = 0;
            radio_save_presets();
        }
    }

    return reload_dir;
}

static bool fm_recording_settings(void)
{
    bool ret;
    
    ret = recording_menu(true);
    if(!ret)
    {
        mpeg_set_recording_options(global_settings.rec_frequency,
                                   global_settings.rec_quality,
                                   1, /* Line In */
                                   global_settings.rec_channels,
                                   global_settings.rec_editable,
                                   global_settings.rec_prerecord_time);
    }
    return ret;
}

bool radio_menu(void)
{
    struct menu_items radio_menu_items[] = {
        { str(LANG_FM_SAVE_PRESET), radio_add_preset },
        { str(LANG_FM_DELETE_PRESET), radio_delete_preset },
        { str(LANG_SOUND_SETTINGS), sound_menu },
        { str(LANG_RECORDING_SETTINGS), fm_recording_settings }
    };
    int m;
    bool result;

    m = menu_init( radio_menu_items,
                   sizeof radio_menu_items / sizeof(struct menu_items) );
    result = menu_run(m);
    menu_exit(m);
    return result;
}

#endif