wps.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

#endif
                if ( muted )
                    mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
                else
                    mpeg_sound_set(SOUND_VOLUME, 0);
                muted = !muted;
#ifdef HAVE_LCD_CHARCELLS
                status_set_param(false);
#endif
                display_mute_text(muted);
                break;

                /* key lock */
#ifdef HAVE_RECORDER_KEYPAD
            case BUTTON_F1 | BUTTON_DOWN:
#else
            case BUTTON_MENU | BUTTON_STOP:
#endif
                keys_locked = !keys_locked;
                display_keylock_text(keys_locked);
                exit = true;
                while (button_get(false)); /* clear button queue */
                break;

#ifdef BUTTON_MENU
                /* change volume */
            case BUTTON_MENU | BUTTON_LEFT:
            case BUTTON_MENU | BUTTON_LEFT | BUTTON_REPEAT:
            case BUTTON_MENU | BUTTON_RIGHT:
            case BUTTON_MENU | BUTTON_RIGHT | BUTTON_REPEAT:
                player_change_volume(button);
                exit = true;
                break;

                /* show id3 tags */
#ifdef BUTTON_ON
            case BUTTON_MENU | BUTTON_ON:
                status_set_param(true);
                status_set_audio(true);
#endif
#else
            case BUTTON_F1 | BUTTON_ON:
#endif
                lcd_clear_display();
                lcd_puts(0, 0, str(LANG_ID3_INFO));
                lcd_puts(0, 1, str(LANG_ID3_SCREEN));
                lcd_update();
                sleep(HZ);
 
                if(browse_id3())
                    return true;
#ifdef HAVE_PLAYER_KEYPAD
                status_set_param(false);
                status_set_audio(true);
#endif
                exit = true;
                break;

            case SYS_USB_CONNECTED:
                status_set_playmode(STATUS_STOP);
                usb_screen();
                return true;
        }
        last_button = button;
    }

#ifdef HAVE_LCD_CHARCELLS
    status_set_param(false);
#endif

    return false;
}

static void fade(bool fade_in)
{
    if (fade_in) {
        /* fade in */
        int current_volume = 20;
        
        /* zero out the sound */
        mpeg_sound_set(SOUND_VOLUME, current_volume);

        sleep(HZ/10); /* let mpeg thread run */
        mpeg_resume();
        
        while (current_volume < global_settings.volume) {    
            current_volume += 2;
            sleep(1);
            mpeg_sound_set(SOUND_VOLUME, current_volume);
        }
        mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
    }
    else {
        /* fade out */
        int current_volume = global_settings.volume;

        while (current_volume > 20) {    
            current_volume -= 2;
            sleep(1);
            mpeg_sound_set(SOUND_VOLUME, current_volume);
        }
        mpeg_pause();
        sleep(HZ/5); /* let mpeg thread run */

        /* reset volume to what it was before the fade */
        mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
    }
}


/* demonstrates showing different formats from playtune */
int wps_show(void)
{
    int button = 0, lastbutton = 0;
    bool ignore_keyup = true;
    bool restore = false;
    bool exit = false;
    bool update_track = false;

    id3 = NULL;
    current_track_path[0] = '\0';

#ifdef HAVE_LCD_CHARCELLS
    status_set_audio(true);
    status_set_param(false);
#else
    if(global_settings.statusbar)
        lcd_setmargins(0, STATUSBAR_HEIGHT);
    else
        lcd_setmargins(0, 0);
#endif

    ff_rewind = false;

    if(mpeg_status() & MPEG_STATUS_PLAY)
    {
        id3 = mpeg_current_track();
        if (id3) {
            if (wps_display(id3))
                return 0;
            wps_refresh(id3, 0, WPS_REFRESH_ALL);

            memcpy(current_track_path, id3->path, sizeof(current_track_path));
        }

        restore = true;
    }

    while ( 1 )
    {
        bool mpeg_paused = (mpeg_status() & MPEG_STATUS_PAUSE)?true:false;
        status_set_playmode(paused ? STATUS_PAUSE : STATUS_PLAY);
        
        /* did someone else (i.e power thread) change mpeg pause mode? */
        if (paused != mpeg_paused) {
            paused = mpeg_paused;

            /* if another thread paused mpeg, we are probably in car mode,
               about to shut down. lets save the settings. */
            if (paused && global_settings.resume) {
                settings_save();
#ifndef HAVE_RTC
                ata_flush();
#endif
            }
        }

#ifdef HAVE_LCD_BITMAP
        /* when the peak meter is enabled we want to have a
            few extra updates to make it look smooth. On the
            other hand we don't want to waste energy if it 
            isn't displayed */
        if (peak_meter_enabled) {
            int i;

            /* In high performance mode we read out the mas as
               often as we can. There is no sleep for cpu */
            if (global_settings.peak_meter_performance) {
                long next_refresh = current_tick;
                long next_big_refresh = current_tick + HZ / 5;
                button = BUTTON_NONE;
                while (!TIME_AFTER(current_tick, next_big_refresh)) {
                    button = button_get(false);
                    if (button != BUTTON_NONE) {
                        break;
                    }
                    peak_meter_peek();
                    sleep(1);

                    if (TIME_AFTER(current_tick, next_refresh)) {
                        wps_refresh(id3, 0, WPS_REFRESH_PEAK_METER);
                        next_refresh = current_tick + HZ / peak_meter_fps;
                    }
                }
            } 
            
            /* In energy saver mode the cpu may sleep a 
               little bit while waiting for buttons */
            else {
            for (i = 0; i < 4; i++) {
                    button = button_get_w_tmo(HZ / peak_meter_fps);
                if (button != 0) {
                    break;
                }
                    wps_refresh(id3, 0, WPS_REFRESH_PEAK_METER);
                }
            }
        } 
        
        /* The peak meter is disabled 
           -> no additional screen updates needed */
        else {
            button = button_get_w_tmo(HZ/5);
        }
#else
        button = button_get_w_tmo(HZ/5);
#endif

        /* discard first event if it's a button release */
        if (button && ignore_keyup)
        {
            ignore_keyup = false;
            if (button & BUTTON_REL && button != SYS_USB_CONNECTED)
                continue;
        }
        
        /* ignore non-remote buttons when keys are locked */
        if (keys_locked &&
#ifdef HAVE_RECORDER_KEYPAD
            ! ((button & BUTTON_F1) ||
#else
            ! ((button & BUTTON_MENU) ||
#endif
               (button == BUTTON_NONE) ||
               (button == SYS_USB_CONNECTED)
#ifdef BUTTON_REMOTE
               || (button & BUTTON_REMOTE)
#endif
               ))
        {
            while (button_get(false)); /* clear button queue */
            display_keylock_text(true);
            restore = true;
            continue;
        }

        /* Exit if mpeg has stopped playing. This can happen if using the
           sleep timer with the charger plugged or if starting a recording
           from F1 */
        if (!mpeg_status())
            exit = true;

        switch(button)
        {
#ifdef BUTTON_ON
            case BUTTON_ON:
#ifdef HAVE_RECORDER_KEYPAD
                switch (on_screen()) {
                    case 2:
                        /* usb connected? */
                        return SYS_USB_CONNECTED;
                
                    case 1:
                        /* was on_screen used? */
                        restore = true;

                        /* pause may have been turned off by pitch screen */
                        if (paused && !(mpeg_status() & MPEG_STATUS_PAUSE)) {
                            paused = false;
                            status_set_playmode(STATUS_PLAY);
                        }
                        break;

                    case 0:
                        /* otherwise, exit to browser */
#else
                        status_set_record(false);
                        status_set_audio(false);
#endif
                        lcd_stop_scroll();

                        /* set dir browser to current playing song */
                        if (global_settings.browse_current &&
                            current_track_path[0] != '\0')
                            set_current_file(current_track_path);
                        
                        return 0;
#ifdef HAVE_RECORDER_KEYPAD
                }
                break;
#endif
#endif /* BUTTON_ON */
                /* play/pause */
            case BUTTON_PLAY:
#ifdef BUTTON_RC_PLAY
            case BUTTON_RC_PLAY:
#endif
                if ( paused )
                {
                    paused = false;
                    status_set_playmode(STATUS_PLAY);
                    if ( global_settings.fade_on_stop )
                        fade(1);
                    else
                        mpeg_resume();
                }
                else
                {
                    paused = true;
                    status_set_playmode(STATUS_PAUSE);
                    if ( global_settings.fade_on_stop )
                        fade(0);
                    else
                        mpeg_pause();
                    if (global_settings.resume) {
                        settings_save();
#ifndef HAVE_RTC
                        ata_flush();
#endif
                    }
                }
                break;

                /* volume up */
#ifdef HAVE_RECORDER_KEYPAD
            case BUTTON_UP:
            case BUTTON_UP | BUTTON_REPEAT:
#endif
#ifdef BUTTON_RC_VOL_UP
            case BUTTON_RC_VOL_UP:
#endif
                global_settings.volume++;
                if(global_settings.volume > mpeg_sound_max(SOUND_VOLUME))
                    global_settings.volume = mpeg_sound_max(SOUND_VOLUME);
                mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
                status_draw(false);
                settings_save();
                break;

                /* volume down */
#ifdef HAVE_RECORDER_KEYPAD
            case BUTTON_DOWN:
            case BUTTON_DOWN | BUTTON_REPEAT:
#endif
#ifdef BUTTON_RC_VOL_DOWN
            case BUTTON_RC_VOL_DOWN:
#endif
                global_settings.volume--;
                if(global_settings.volume < mpeg_sound_min(SOUND_VOLUME))
                    global_settings.volume = mpeg_sound_min(SOUND_VOLUME);
                mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
                status_draw(false);
                settings_save();
                break;

                /* fast forward / rewind */
            case BUTTON_LEFT | BUTTON_REPEAT:
            case BUTTON_RIGHT | BUTTON_REPEAT:
                ffwd_rew(button);
                break;

                /* prev / restart */
#ifdef BUTTON_RC_LEFT
            case BUTTON_RC_LEFT:
#endif
            case BUTTON_LEFT | BUTTON_REL:
#ifdef HAVE_RECORDER_KEYPAD
                if ((button == (BUTTON_LEFT | BUTTON_REL)) &&
                    (lastbutton != BUTTON_LEFT ))
                    break; 
#endif
                if (!id3 || (id3->elapsed < 3*1000)) {
                    mpeg_prev();
                }
                else {
                    if (!paused)
                        mpeg_pause();

                    mpeg_ff_rewind(0);

                    if (!paused)
                        mpeg_resume();
                }
                break;

                /* next */
#ifdef BUTTON_RC_RIGHT
            case BUTTON_RC_RIGHT:
#endif
            case BUTTON_RIGHT | BUTTON_REL:
#ifdef HAVE_RECORDER_KEYPAD
                if ((button == (BUTTON_RIGHT | BUTTON_REL)) &&
                    (lastbutton != BUTTON_RIGHT))
                     break; 
#endif
                mpeg_next();
                break;

                /* menu key functions */
#ifdef BUTTON_MENU
            case BUTTON_MENU:
#else
            case BUTTON_F1:
#endif
                if (menu())
                    return SYS_USB_CONNECTED;

                update_track = true;
                restore = true;
                break;

#ifdef HAVE_RECORDER_KEYPAD
                /* play settings */
            case BUTTON_F2:
                if (f2_screen())
                    return SYS_USB_CONNECTED;
                restore = true;
                break;

                /* screen settings */
            case BUTTON_F3:
                if (f3_screen())
                    return SYS_USB_CONNECTED;
                restore = true;
                break;
#endif

                /* stop and exit wps */
#ifdef BUTTON_RC_STOP
            case BUTTON_RC_STOP:
#endif
#ifdef BUTTON_OFF
            case BUTTON_OFF | BUTTON_REL:
#else
            case BUTTON_STOP | BUTTON_REL:
                if ( lastbutton != BUTTON_STOP )
                    break;
#endif
                exit = true;
                break;

            case SYS_USB_CONNECTED:
                status_set_playmode(STATUS_STOP);
                usb_screen();
                return SYS_USB_CONNECTED;

            case BUTTON_NONE: /* Timeout */
                update_track = true;
                break;
        }

        if (update_track)
        {
            if (update())
            {
                /* set dir browser to current playing song */
                if (global_settings.browse_current &&
                    current_track_path[0] != '\0')
                    set_current_file(current_track_path);
                
                return 0;
            }
            update_track = false;
        }

        if (exit) {
#ifdef HAVE_LCD_CHARCELLS
            status_set_record(false);
            status_set_audio(false);
#endif
            if (global_settings.fade_on_stop)
                fade(0);
                
            lcd_stop_scroll();
            bookmark_autobookmark();
            mpeg_stop();
            status_set_playmode(STATUS_STOP);

            /* Keys can be locked when exiting, so either unlock here
               or implement key locking in tree.c too */
            keys_locked=false;

            /* set dir browser to current playing song */
            if (global_settings.browse_current &&
                current_track_path[0] != '\0')
                set_current_file(current_track_path);
            
            return 0;
        }
                    
        if ( button )
            ata_spin();

        if (restore) {
            restore = false;
            if (wps_display(id3))
            {
                /* set dir browser to current playing song */
                if (global_settings.browse_current &&
                    current_track_path[0] != '\0')
                    set_current_file(current_track_path);

                return 0;
            }

            if (id3)
                wps_refresh(id3, 0, WPS_REFRESH_NON_STATIC);
        }
        if(button != BUTTON_NONE)
            lastbutton = button;
    }
    return 0; /* unreachable - just to reduce compiler warnings */
}