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rockbox/apps/playlist_viewer.c
Hardeep Sidhu 06605a92c0 Buffer margin was off by 1 causing corruption when page scrolling 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9953 a1c6a512-1295-4272-9138-f99709370657
2006-05-17 07:57:54 +00:00

925 lines
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/***************************************************************************
*
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2003 Hardeep Sidhu
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* Kevin Ferrare 2005/10/16
* multi-screen support, rewrote a lot of code
*/
#include <string.h>
#include <sprintf.h>
#include "playlist.h"
#include "audio.h"
#include "screens.h"
#include "status.h"
#include "settings.h"
#include "icons.h"
#include "menu.h"
#include "plugin.h"
#include "keyboard.h"
#include "tree.h"
#include "onplay.h"
#include "talk.h"
#include "misc.h"
#include "action.h"
#include "debug.h"
#include "backlight.h"
#include "lang.h"
#include "playlist_viewer.h"
#include "icon.h"
#include "list.h"
#include "statusbar.h"
#include "splash.h"
#include "playlist_menu.h"
/* Maximum number of tracks we can have loaded at one time */
#define MAX_PLAYLIST_ENTRIES 200
/* The number of items between the selected one and the end/start of
* the buffer under which the buffer must reload */
#define MIN_BUFFER_MARGIN (screens[0].nb_lines+1)
/* Default playlist name for saving */
#define DEFAULT_VIEWER_PLAYLIST_NAME "/viewer.m3u"
/* Information about a specific track */
struct playlist_entry {
char *name; /* Formatted track name */
int index; /* Playlist index */
int display_index; /* Display index */
bool queued; /* Is track queued? */
bool skipped; /* Is track marked as bad? */
};
enum direction
{
FORWARD,
BACKWARD
};
struct playlist_buffer
{
char *name_buffer; /* Buffer used to store track names */
int buffer_size; /* Size of name buffer */
int first_index; /* Real index of first track loaded inside
the buffer */
enum direction direction; /* Direction of the buffer (if the buffer
was loaded BACKWARD, the last track in
the buffer has a real index < to the
real index of the the first track)*/
struct playlist_entry tracks[MAX_PLAYLIST_ENTRIES];
int num_loaded; /* Number of track entries loaded in buffer */
};
/* Global playlist viewer settings */
struct playlist_viewer {
struct playlist_info* playlist; /* playlist being viewed */
int num_tracks; /* Number of tracks in playlist */
int current_playing_track; /* Index of current playing track */
int selected_track; /* The selected track, relative (first is 0)*/
int move_track; /* Playlist index of track to move or -1 */
struct playlist_buffer buffer;
};
static struct playlist_viewer viewer;
/* Used when viewing playlists on disk */
static struct playlist_info temp_playlist;
void playlist_buffer_init(struct playlist_buffer * pb, char * names_buffer,
int names_buffer_size);
void playlist_buffer_load_entries(struct playlist_buffer * pb, int index,
enum direction direction);
int playlist_entry_load(struct playlist_entry *entry, int index,
char* name_buffer, int remaining_size);
struct playlist_entry * playlist_buffer_get_track(struct playlist_buffer * pb,
int index);
static bool playlist_viewer_init(struct playlist_viewer * viewer,
char* filename, bool reload);
static void format_name(char* dest, const char* src);
static void format_line(const struct playlist_entry* track, char* str,
int len);
static bool update_playlist(bool force);
static int onplay_menu(int index);
static bool viewer_menu(void);
static bool show_icons(void);
static bool show_indices(void);
static bool track_display(void);
static bool save_playlist(void);
void playlist_buffer_init(struct playlist_buffer * pb, char * names_buffer,
int names_buffer_size)
{
pb->name_buffer=names_buffer;
pb->buffer_size=names_buffer_size;
pb->first_index=0;
pb->num_loaded=0;
}
/*
* Loads the entries following 'index' in the playlist buffer
*/
void playlist_buffer_load_entries(struct playlist_buffer * pb, int index,
enum direction direction)
{
int num_entries = viewer.num_tracks;
char* p = pb->name_buffer;
int remaining = pb->buffer_size;
int i;
pb->first_index = index;
if (num_entries > MAX_PLAYLIST_ENTRIES)
num_entries = MAX_PLAYLIST_ENTRIES;
for(i=0; i<num_entries; i++)
{
int len = playlist_entry_load(&(pb->tracks[i]), index, p, remaining);
if (len < 0)
{
/* Out of name buffer space */
num_entries = i;
break;
}
p += len;
remaining -= len;
if(direction==FORWARD)
index++;
else
index--;
index+=viewer.num_tracks;
index%=viewer.num_tracks;
}
pb->direction=direction;
pb->num_loaded = i;
}
void playlist_buffer_load_entries_screen(struct playlist_buffer * pb,
enum direction direction)
{
if(direction==FORWARD)
{
int min_start=viewer.selected_track-2*screens[0].nb_lines;
while(min_start<0)
min_start+=viewer.num_tracks;
min_start %= viewer.num_tracks;
playlist_buffer_load_entries(pb, min_start, FORWARD);
}
else
{
int max_start=viewer.selected_track+2*screens[0].nb_lines;
max_start%=viewer.num_tracks;
playlist_buffer_load_entries(pb, max_start, BACKWARD);
}
}
int playlist_entry_load(struct playlist_entry *entry, int index,
char* name_buffer, int remaining_size)
{
struct playlist_track_info info;
int len;
/* Playlist viewer orders songs based on display index. We need to
convert to real playlist index to access track */
index = (index + playlist_get_first_index(viewer.playlist)) %
viewer.num_tracks;
if (playlist_get_track_info(viewer.playlist, index, &info) < 0)
return -1;
len = strlen(info.filename) + 1;
if (len <= remaining_size)
{
strcpy(name_buffer, info.filename);
entry->name = name_buffer;
entry->index = info.index;
entry->display_index = info.display_index;
entry->queued = info.attr & PLAYLIST_ATTR_QUEUED;
entry->skipped = info.attr & PLAYLIST_ATTR_SKIPPED;
return len;
}
return -1;
}
int playlist_buffer_get_index(struct playlist_buffer * pb, int index )
{
int buffer_index;
if(pb->direction==FORWARD)
{
if(index>=pb->first_index)
buffer_index=index-pb->first_index;
else /* rotation : track0 in buffer + requested track */
buffer_index=(viewer.num_tracks-pb->first_index)+(index);
}
else
{
if(index<=pb->first_index)
buffer_index=pb->first_index-index;
else /* rotation : track0 in buffer + dist from the last track
to the requested track (num_tracks-requested track) */
buffer_index=(pb->first_index)+(viewer.num_tracks-index);
}
return(buffer_index);
}
#define distance(a, b) \
a>b? (a) - (b) : (b) - (a)
bool playlist_buffer_needs_reload(struct playlist_buffer* pb, int track_index)
{
if(pb->num_loaded==viewer.num_tracks)
return(false);
int selected_index=playlist_buffer_get_index(pb, track_index);
int first_buffer_index=playlist_buffer_get_index(pb, pb->first_index);
int distance_beginning=distance(selected_index, first_buffer_index);
if(distance_beginning<MIN_BUFFER_MARGIN)
return(true);
if(pb->num_loaded - distance_beginning < MIN_BUFFER_MARGIN)
return(true);
return(false);
}
struct playlist_entry * playlist_buffer_get_track(struct playlist_buffer * pb,
int index)
{
int buffer_index=playlist_buffer_get_index(pb, index);
return(&(pb->tracks[buffer_index]));
}
/* Initialize the playlist viewer. */
static bool playlist_viewer_init(struct playlist_viewer * viewer,
char* filename, bool reload)
{
char* buffer;
int buffer_size;
bool is_playing = audio_status() & AUDIO_STATUS_PLAY;
if (!filename && !is_playing)
/* Nothing is playing, exit */
return false;
buffer = plugin_get_buffer(&buffer_size);
if (!buffer)
return false;
if (!filename)
viewer->playlist = NULL;
else
{
/* Viewing playlist on disk */
char *dir, *file, *temp_ptr;
char *index_buffer = NULL;
int index_buffer_size = 0;
viewer->playlist = &temp_playlist;
/* Separate directory from filename */
temp_ptr = strrchr(filename+1,'/');
if (temp_ptr)
{
*temp_ptr = 0;
dir = filename;
file = temp_ptr + 1;
}
else
{
dir = "/";
file = filename+1;
}
if (is_playing)
{
/* Something is playing, use half the plugin buffer for playlist
indices */
index_buffer_size = buffer_size / 2;
index_buffer = buffer;
}
playlist_create_ex(viewer->playlist, dir, file, index_buffer,
index_buffer_size, buffer+index_buffer_size,
buffer_size-index_buffer_size);
if (temp_ptr)
*temp_ptr = '/';
buffer += index_buffer_size;
buffer_size -= index_buffer_size;
}
playlist_buffer_init(&viewer->buffer, buffer, buffer_size );
viewer->move_track = -1;
if (!reload)
{
if (viewer->playlist)
viewer->selected_track = 0;
else
viewer->selected_track = playlist_get_display_index() - 1;
}
if (!update_playlist(true))
return false;
return true;
}
/* Format trackname for display purposes */
static void format_name(char* dest, const char* src)
{
switch (global_settings.playlist_viewer_track_display)
{
case 0:
default:
{
/* Only display the mp3 filename */
char* p = strrchr(src, '/');
int len;
strcpy(dest, p+1);
len = strlen(dest);
/* Remove the extension */
if (!strcasecmp(&dest[len-4], ".mp3") ||
!strcasecmp(&dest[len-4], ".mp2") ||
!strcasecmp(&dest[len-4], ".mpa"))
dest[len-4] = '\0';
break;
}
case 1:
/* Full path */
strcpy(dest, src);
break;
}
}
/* Format display line */
static void format_line(const struct playlist_entry* track, char* str,
int len)
{
char name[MAX_PATH];
char *skipped = "";
format_name(name, track->name);
if (track->skipped)
skipped = "(ERR) ";
if (global_settings.playlist_viewer_indices)
/* Display playlist index */
snprintf(str, len, "%d. %s%s", track->display_index, skipped, name);
else
snprintf(str, len, "%s%s", skipped, name);
}
/* Update playlist in case something has changed or forced */
static bool update_playlist(bool force)
{
if (!viewer.playlist)
playlist_get_resume_info(&viewer.current_playing_track);
else
viewer.current_playing_track = -1;
int nb_tracks=playlist_amount_ex(viewer.playlist);
force=force || nb_tracks != viewer.num_tracks;
if (force)
{
/* Reload tracks */
viewer.num_tracks = nb_tracks;
if (viewer.num_tracks <= 0)
return false;
playlist_buffer_load_entries_screen(&viewer.buffer, FORWARD);
if (viewer.buffer.num_loaded <= 0)
return false;
}
return true;
}
/* Menu of playlist commands. Invoked via ON+PLAY on main viewer screen.
Returns -1 if USB attached, 0 if no playlist change, and 1 if playlist
changed. */
static int onplay_menu(int index)
{
struct menu_item items[3]; /* increase this if you add entries! */
int m, i=0, result, ret = 0;
struct playlist_entry * current_track=
playlist_buffer_get_track(&viewer.buffer, index);
bool current = (current_track->index == viewer.current_playing_track);
items[i].desc = ID2P(LANG_REMOVE);
i++;
items[i].desc = ID2P(LANG_MOVE);
i++;
items[i].desc = ID2P(LANG_FILE_OPTIONS);
i++;
m = menu_init(items, i, NULL, NULL, NULL, NULL);
result = menu_show(m);
if (result == MENU_ATTACHED_USB)
ret = -1;
else if (result >= 0)
{
/* Abort current move */
viewer.move_track = -1;
switch (result)
{
case 0:
/* delete track */
playlist_delete(viewer.playlist, current_track->index);
if (current)
{
if (playlist_amount_ex(viewer.playlist) <= 0)
audio_stop();
else
{
/* Start playing new track except if it's the lasttrack
track in the playlist and repeat mode is disabled */
current_track =
playlist_buffer_get_track(&viewer.buffer, index);
if (current_track->display_index!=viewer.num_tracks ||
global_settings.repeat_mode == REPEAT_ALL)
{
talk_buffer_steal(); /* will use the mp3 buffer */
audio_play(0);
viewer.current_playing_track = -1;
}
}
}
ret = 1;
break;
case 1:
/* move track */
viewer.move_track = current_track->index;
ret = 0;
break;
case 2:
{
onplay(current_track->name, TREE_ATTR_MPA, CONTEXT_TREE);
if (!viewer.playlist)
ret = 1;
else
ret = 0;
break;
}
}
}
menu_exit(m);
return ret;
}
/* Menu of viewer options. Invoked via F1(r) or Menu(p). */
static bool viewer_menu(void)
{
int m;
bool result;
static const struct menu_item items[] = {
{ ID2P(LANG_SHOW_ICONS), show_icons },
{ ID2P(LANG_SHOW_INDICES), show_indices },
{ ID2P(LANG_TRACK_DISPLAY), track_display },
{ ID2P(LANG_SAVE_DYNAMIC_PLAYLIST), save_playlist },
};
m=menu_init( items, sizeof(items) / sizeof(*items), NULL,
NULL, NULL, NULL );
result = menu_run(m);
menu_exit(m);
settings_save();
return result;
}
/* Show icons in viewer? */
static bool show_icons(void)
{
return set_bool((char *)str(LANG_SHOW_ICONS),
&global_settings.playlist_viewer_icons);
}
/* Show indices of tracks? */
static bool show_indices(void)
{
return set_bool((char *)str(LANG_SHOW_INDICES),
&global_settings.playlist_viewer_indices);
}
/* How to display a track */
static bool track_display(void)
{
static const struct opt_items names[] = {
{ STR(LANG_DISPLAY_TRACK_NAME_ONLY) },
{ STR(LANG_DISPLAY_FULL_PATH) }
};
return set_option((char *)str(LANG_TRACK_DISPLAY),
&global_settings.playlist_viewer_track_display, INT, names, 2,
NULL);
}
/* Save playlist to disk */
static bool save_playlist(void)
{
save_playlist_screen(viewer.playlist);
return false;
}
/* View current playlist */
bool playlist_viewer(void)
{
return playlist_viewer_ex(NULL);
}
char * playlist_callback_name(int selected_item, void * data, char *buffer)
{
struct playlist_viewer * local_viewer = (struct playlist_viewer *)data;
struct playlist_entry *track=
playlist_buffer_get_track(&(local_viewer->buffer), selected_item);
format_line(track, buffer, MAX_PATH);
return(buffer);
}
void playlist_callback_icons(int selected_item, void * data, ICON * icon)
{
struct playlist_viewer * local_viewer=(struct playlist_viewer *)data;
struct playlist_entry *track=
playlist_buffer_get_track(&(local_viewer->buffer), selected_item);
if (track->index == local_viewer->current_playing_track)
{
/* Current playing track */
#ifdef HAVE_LCD_BITMAP
*icon=bitmap_icons_6x8[Icon_Audio];
#else
*icon=Icon_Audio;
#endif
}
else if (track->index == local_viewer->move_track)
{
/* Track we are moving */
#ifdef HAVE_LCD_BITMAP
*icon=bitmap_icons_6x8[Icon_Moving];
#else
*icon=Icon_Moving;
#endif
}
else if (track->queued)
{
/* Queued track */
#ifdef HAVE_LCD_BITMAP
*icon=bitmap_icons_6x8[Icon_Queued];
#else
*icon=Icon_Queued;
#endif
}
else
#ifdef HAVE_LCD_BITMAP
*icon=0;
#else
*icon=-1;
#endif
}
/* Main viewer function. Filename identifies playlist to be viewed. If NULL,
view current playlist. */
bool playlist_viewer_ex(char* filename)
{
bool ret = false; /* return value */
bool exit=false; /* exit viewer */
int button, lastbutton = BUTTON_NONE;
struct gui_synclist playlist_lists;
if (!playlist_viewer_init(&viewer, filename, false))
goto exit;
gui_synclist_init(&playlist_lists, playlist_callback_name, &viewer);
gui_synclist_set_icon_callback(&playlist_lists,
global_settings.playlist_viewer_icons?
&playlist_callback_icons:NULL);
gui_synclist_set_nb_items(&playlist_lists, viewer.num_tracks);
gui_synclist_select_item(&playlist_lists, viewer.selected_track);
gui_synclist_draw(&playlist_lists);
while (!exit)
{
int track;
if (!viewer.playlist && !(audio_status() & AUDIO_STATUS_PLAY))
{
/* Play has stopped */
#ifdef HAVE_LCD_CHARCELLS
gui_syncsplash(HZ, true, str(LANG_END_PLAYLIST_PLAYER));
#else
gui_syncsplash(HZ, true, str(LANG_END_PLAYLIST_RECORDER));
#endif
goto exit;
}
if (viewer.move_track != -1)
gui_synclist_flash(&playlist_lists);
if (!viewer.playlist)
playlist_get_resume_info(&track);
else
track = -1;
if (track != viewer.current_playing_track ||
playlist_amount_ex(viewer.playlist) != viewer.num_tracks)
{
/* Playlist has changed (new track started?) */
if (!update_playlist(false))
goto exit;
gui_synclist_set_nb_items(&playlist_lists, viewer.num_tracks);
/* Abort move on playlist change */
viewer.move_track = -1;
}
/* Timeout so we can determine if play status has changed */
button = button_get_w_tmo(HZ/2);
int list_action;
if( (list_action=gui_synclist_do_button(&playlist_lists, button))!=0 )
{
viewer.selected_track=gui_synclist_get_sel_pos(&playlist_lists);
if(playlist_buffer_needs_reload(&viewer.buffer,
viewer.selected_track))
playlist_buffer_load_entries_screen(&viewer.buffer,
list_action==LIST_NEXT?
FORWARD
:
BACKWARD
);
}
switch (button)
{
case TREE_EXIT:
#ifdef TREE_RC_EXIT
case TREE_RC_EXIT:
#endif
#ifdef TREE_OFF
case TREE_OFF:
#endif
exit = true;
break;
#ifdef TREE_ENTER
case TREE_ENTER:
case TREE_ENTER | BUTTON_REPEAT:
#endif
#ifdef TREE_RC_RUN
case TREE_RC_RUN:
#endif
case TREE_RUN:
#ifdef TREE_RUN_PRE
if (((button == TREE_RUN)
#ifdef TREE_RC_RUN_PRE
|| (button == TREE_RC_RUN))
&& ((lastbutton != TREE_RC_RUN_PRE)
#endif
&& (lastbutton != TREE_RUN_PRE)))
break;
#endif
struct playlist_entry * current_track =
playlist_buffer_get_track(&viewer.buffer,
viewer.selected_track);
if (viewer.move_track >= 0)
{
/* Move track */
int ret;
ret = playlist_move(viewer.playlist, viewer.move_track,
current_track->index);
if (ret < 0)
gui_syncsplash(HZ, true, str(LANG_MOVE_FAILED));
update_playlist(true);
viewer.move_track = -1;
}
else if (!viewer.playlist)
{
/* play new track */
playlist_start(current_track->index, 0);
update_playlist(false);
}
else
{
/* New playlist */
if (playlist_set_current(viewer.playlist) < 0)
goto exit;
playlist_start(current_track->index, 0);
/* Our playlist is now the current list */
if (!playlist_viewer_init(&viewer, NULL, true))
goto exit;
}
gui_synclist_draw(&playlist_lists);
break;
case TREE_CONTEXT:
#ifdef TREE_CONTEXT2
case TREE_CONTEXT2:
#endif
#ifdef TREE_RC_CONTEXT
case TREE_RC_CONTEXT:
#endif
{
/* ON+PLAY menu */
int ret;
ret = onplay_menu(viewer.selected_track);
if (ret < 0)
{
ret = true;
goto exit;
}
else if (ret > 0)
{
/* Playlist changed */
gui_synclist_del_item(&playlist_lists);
update_playlist(true);
if (viewer.num_tracks <= 0)
exit = true;
}
gui_synclist_draw(&playlist_lists);
break;
}
#ifdef TREE_MENU_PRE
case TREE_MENU_PRE:
#else
case TREE_MENU:
#endif
#ifdef TREE_RC_MENU
case TREE_RC_MENU:
#endif
if (viewer_menu())
{
ret = true;
goto exit;
}
gui_synclist_set_icon_callback(
&playlist_lists,
global_settings.playlist_viewer_icons?
&playlist_callback_icons:NULL
);
gui_synclist_draw(&playlist_lists);
break;
case BUTTON_NONE:
gui_syncstatusbar_draw(&statusbars, false);
break;
default:
if(default_event_handler(button) == SYS_USB_CONNECTED)
{
ret = true;
goto exit;
}
break;
}
lastbutton = button;
}
exit:
if (viewer.playlist)
playlist_close(viewer.playlist);
return ret;
}
char * playlist_search_callback_name(int selected_item, void * data, char *buffer)
{
int *found_indicies = (int*)data;
static struct playlist_track_info track;
playlist_get_track_info(viewer.playlist,found_indicies[selected_item],&track);
format_name(buffer,track.filename);
return(buffer);
}
void playlist_search_callback_icons(int selected_item, void * data, ICON * icon)
{
(void)selected_item;
(void)data;
#ifdef HAVE_LCD_BITMAP
*icon=0;
#else
*icon=-1;
#endif
}
bool search_playlist(void)
{
char search_str[32] = "";
bool ret = false, exit = false;
int i, playlist_count;
int found_indicies[MAX_PLAYLIST_ENTRIES],found_indicies_count = 0;
int button;
struct gui_synclist playlist_lists;
struct playlist_track_info track;
if (!playlist_viewer_init(&viewer, 0, false))
return ret;
if (kbd_input(search_str,sizeof(search_str)) == -1)
return ret;
lcd_clear_display();
playlist_count = playlist_amount_ex(viewer.playlist);
for (i=0;(i<playlist_count)&&(found_indicies_count<MAX_PLAYLIST_ENTRIES);i++)
{
gui_syncsplash(0, true, str(LANG_PLAYLIST_SEARCH_MSG),found_indicies_count,
#if CONFIG_KEYPAD == PLAYER_PAD
str(LANG_STOP_ABORT)
#else
str(LANG_OFF_ABORT)
#endif
);
if (SETTINGS_CANCEL == button_get(false))
return ret;
playlist_get_track_info(viewer.playlist,i,&track);
if (strcasestr(track.filename,search_str))
{
found_indicies[found_indicies_count++] = track.index;
}
}
if (!found_indicies_count)
{
return ret;
}
backlight_on();
gui_synclist_init(&playlist_lists, playlist_search_callback_name,
found_indicies);
gui_synclist_set_icon_callback(&playlist_lists,
global_settings.playlist_viewer_icons?
&playlist_search_callback_icons:NULL);
gui_synclist_set_nb_items(&playlist_lists, found_indicies_count);
gui_synclist_select_item(&playlist_lists, 0);
gui_synclist_draw(&playlist_lists);
while (!exit)
{
button = button_get(true);
if (gui_synclist_do_button(&playlist_lists, button))
continue;
switch (button)
{
case TREE_EXIT:
#ifdef TREE_RC_EXIT
case TREE_RC_EXIT:
#endif
#ifdef TREE_OFF
case TREE_OFF:
#endif
exit = true;
break;
#ifdef TREE_ENTER
case TREE_ENTER:
case TREE_ENTER | BUTTON_REPEAT:
#endif
#ifdef TREE_RC_RUN
case TREE_RC_RUN:
#endif
case TREE_RUN:
playlist_start(
found_indicies[gui_synclist_get_sel_pos(&playlist_lists)]
,0);
exit = 1;
break;
case BUTTON_NONE:
break;
default:
if(default_event_handler(button) == SYS_USB_CONNECTED)
{
ret = true;
exit = true;
}
break;
}
}
return ret;
}
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