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rockbox/apps/cuesheet.c
Jonathan Gordon 24b136f62d rework cuesheet support: 
swcodec: search for a .cue during buffering (with the possibility of adding embedded cuesheets later)
hwcodec: search for a .cue when the id3 info for the current track is requested for the first time (disk should be spining so non issue)

major beenfit from this is simplofy cuesheet handling code a bit... if mp3entry.cuesheet != NULL then there is a valid cuesheet.. no need to worry about if its enabled and preloaded.
There is the possibility of putting the next/prev subtrack handling inside the playback code (as well as the id3 updating stuff (see FS#9789 for more info), but thats probably not a good idea.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21978 a1c6a512-1295-4272-9138-f99709370657
2009-07-20 05:18:18 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 Nicolas Pennequin, Jonathan Gordon
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <ctype.h>
#include <string.h>
#include "system.h"
#include "audio.h"
#include "kernel.h"
#include "logf.h"
#include "sprintf.h"
#include "misc.h"
#include "screens.h"
#include "list.h"
#include "action.h"
#include "lang.h"
#include "debug.h"
#include "settings.h"
#include "buffer.h"
#include "plugin.h"
#include "playback.h"
#include "cuesheet.h"
#define CUE_DIR ROCKBOX_DIR "/cue"
bool look_for_cuesheet_file(const char *trackpath, char *found_cue_path)
{
/* DEBUGF("look for cue file\n"); */
char cuepath[MAX_PATH];
char *dot, *slash;
slash = strrchr(trackpath, '/');
if (!slash)
{
found_cue_path = NULL;
return false;
}
strlcpy(cuepath, trackpath, MAX_PATH);
dot = strrchr(cuepath, '.');
strcpy(dot, ".cue");
if (!file_exists(cuepath))
{
strcpy(cuepath, CUE_DIR);
strcat(cuepath, slash);
char *dot = strrchr(cuepath, '.');
strcpy(dot, ".cue");
if (!file_exists(cuepath))
{
if (found_cue_path)
found_cue_path = NULL;
return false;
}
}
if (found_cue_path)
strlcpy(found_cue_path, cuepath, MAX_PATH);
return true;
}
static char *get_string(const char *line)
{
char *start, *end;
start = strchr(line, '"');
if (!start)
{
start = strchr(line, ' ');
if (!start)
return NULL;
}
end = strchr(++start, '"');
if (end)
*end = '\0';
return start;
}
/* parse cuesheet "file" and store the information in "cue" */
bool parse_cuesheet(char *file, struct cuesheet *cue)
{
char line[MAX_PATH];
char *s;
bool utf8 = false;
int fd = open_utf8(file,O_RDONLY);
if (fd < 0)
{
/* couln't open the file */
return false;
}
if(lseek(fd, 0, SEEK_CUR) > 0)
utf8 = true;
/* Initialization */
memset(cue, 0, sizeof(struct cuesheet));
strcpy(cue->path, file);
cue->curr_track = cue->tracks;
while ( read_line(fd,line,MAX_PATH) && cue->track_count < MAX_TRACKS )
{
s = skip_whitespace(line);
if (!strncmp(s, "TRACK", 5))
{
cue->track_count++;
}
else if (!strncmp(s, "INDEX 01", 8))
{
s = strchr(s,' ');
s = skip_whitespace(s);
s = strchr(s,' ');
s = skip_whitespace(s);
cue->tracks[cue->track_count-1].offset = 60*1000 * atoi(s);
s = strchr(s,':') + 1;
cue->tracks[cue->track_count-1].offset += 1000 * atoi(s);
s = strchr(s,':') + 1;
cue->tracks[cue->track_count-1].offset += 13 * atoi(s);
}
else if (!strncmp(s, "TITLE", 5)
|| !strncmp(s, "PERFORMER", 9)
|| !strncmp(s, "SONGWRITER", 10))
{
char *dest = NULL;
char *string = get_string(s);
if (!string)
break;
switch (*s)
{
case 'T': /* TITLE */
dest = (cue->track_count <= 0) ? cue->title :
cue->tracks[cue->track_count-1].title;
break;
case 'P': /* PERFORMER */
dest = (cue->track_count <= 0) ? cue->performer :
cue->tracks[cue->track_count-1].performer;
break;
case 'S': /* SONGWRITER */
dest = (cue->track_count <= 0) ? cue->songwriter :
cue->tracks[cue->track_count-1].songwriter;
break;
}
if (dest)
{
if (!utf8)
{
dest = iso_decode(string, dest, -1, MIN(strlen(string), MAX_NAME));
*dest = '\0';
}
else
{
strlcpy(dest, string, MAX_NAME*3 + 1);
}
}
}
}
close(fd);
/* If some songs don't have performer info, we copy the cuesheet performer */
int i;
for (i = 0; i < cue->track_count; i++)
{
if (*(cue->tracks[i].performer) == '\0')
strlcpy(cue->tracks[i].performer, cue->performer, MAX_NAME*3);
if (*(cue->tracks[i].songwriter) == '\0')
strlcpy(cue->tracks[i].songwriter, cue->songwriter, MAX_NAME*3);
}
return true;
}
/* takes care of seeking to a track in a playlist
* returns false if audio isn't playing */
static bool seek(unsigned long pos)
{
if (!(audio_status() & AUDIO_STATUS_PLAY))
{
return false;
}
else
{
#if (CONFIG_CODEC == SWCODEC)
audio_pre_ff_rewind();
audio_ff_rewind(pos);
#else
audio_pause();
audio_ff_rewind(pos);
audio_resume();
#endif
return true;
}
}
/* returns the index of the track currently being played
and updates the information about the current track. */
int cue_find_current_track(struct cuesheet *cue, unsigned long curpos)
{
int i=0;
while (i < cue->track_count-1 && cue->tracks[i+1].offset < curpos)
i++;
cue->curr_track_idx = i;
cue->curr_track = cue->tracks + i;
return i;
}
/* callback that gives list item titles for the cuesheet browser */
static char *list_get_name_cb(int selected_item,
void *data,
char *buffer,
size_t buffer_len)
{
struct cuesheet *cue = (struct cuesheet *)data;
if (selected_item & 1)
strlcpy(buffer, cue->tracks[selected_item/2].title, buffer_len);
else
snprintf(buffer, buffer_len, "%02d. %s", selected_item/2+1,
cue->tracks[selected_item/2].performer);
return buffer;
}
void browse_cuesheet(struct cuesheet *cue)
{
struct gui_synclist lists;
int action;
bool done = false;
int sel;
char title[MAX_PATH];
char cuepath[MAX_PATH];
struct mp3entry *id3 = audio_current_track();
snprintf(title, MAX_PATH, "%s: %s", cue->performer, cue->title);
gui_synclist_init(&lists, list_get_name_cb, cue, false, 2, NULL);
gui_synclist_set_nb_items(&lists, 2*cue->track_count);
gui_synclist_set_title(&lists, title, 0);
if (id3)
{
gui_synclist_select_item(&lists,
2*cue_find_current_track(cue, id3->elapsed));
}
while (!done)
{
gui_synclist_draw(&lists);
action = get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
if (gui_synclist_do_button(&lists, &action, LIST_WRAP_UNLESS_HELD))
continue;
switch (action)
{
case ACTION_STD_OK:
id3 = audio_current_track();
if (id3 && *id3->path && strcmp(id3->path, "No file!"))
{
look_for_cuesheet_file(id3->path, cuepath);
if (id3->cuesheet && !strcmp(cue->path, cuepath))
{
sel = gui_synclist_get_sel_pos(&lists);
seek(cue->tracks[sel/2].offset);
}
}
break;
case ACTION_STD_CANCEL:
done = true;
}
}
}
bool display_cuesheet_content(char* filename)
{
size_t bufsize = 0;
struct cuesheet *cue = (struct cuesheet *)plugin_get_buffer(&bufsize);
if (!cue || bufsize < sizeof(struct cuesheet))
return false;
if (!parse_cuesheet(filename, cue))
return false;
browse_cuesheet(cue);
return true;
}
/* skips backwards or forward in the current cuesheet
* the return value indicates whether we're still in a cusheet after skipping
* it also returns false if we weren't in a cuesheet.
* direction should be 1 or -1.
*/
bool curr_cuesheet_skip(int direction, unsigned long curr_pos)
{
struct cuesheet *curr_cue = audio_current_track()->cuesheet;
int track = cue_find_current_track(curr_cue, curr_pos);
if (direction >= 0 && track == curr_cue->track_count - 1)
{
/* we want to get out of the cuesheet */
return false;
}
else
{
if (!(direction <= 0 && track == 0))
track += direction;
seek(curr_cue->tracks[track].offset);
return true;
}
}
void cue_spoof_id3(struct cuesheet *cue, struct mp3entry *id3)
{
if (!cue || !cue->curr_track)
return;
struct cue_track_info *track = cue->curr_track;
id3->title = *track->title ? track->title : NULL;
id3->artist = *track->performer ? track->performer : NULL;
id3->composer = *track->songwriter ? track->songwriter : NULL;
id3->album = *cue->title ? cue->title : NULL;
/* if the album artist is the same as the track artist, we hide it. */
if (strcmp(cue->performer, track->performer))
id3->albumartist = *cue->performer ? cue->performer : NULL;
else
id3->albumartist = NULL;
int i = cue->curr_track_idx;
id3->tracknum = i+1;
if (id3->track_string)
snprintf(id3->track_string, 10, "%d/%d", i+1, cue->track_count);
}
#ifdef HAVE_LCD_BITMAP
static inline void draw_veritcal_line_mark(struct screen * screen,
int x, int y, int h)
{
screen->set_drawmode(DRMODE_COMPLEMENT);
screen->vline(x, y, y+h-1);
}
/* draw the cuesheet markers for a track of length "tracklen",
between (x1,y) and (x2,y) */
void cue_draw_markers(struct screen *screen, unsigned long tracklen,
int x1, int x2, int y, int h)
{
struct cuesheet *curr_cue = audio_current_track()->cuesheet;
int i,xi;
int w = x2 - x1;
for (i=1; i < curr_cue->track_count; i++)
{
xi = x1 + (w * curr_cue->tracks[i].offset)/tracklen;
draw_veritcal_line_mark(screen, xi, y, h);
}
}
#endif
bool cuesheet_subtrack_changed(struct mp3entry *id3)
{
struct cuesheet *cue = id3->cuesheet;
if (cue && (id3->elapsed < cue->curr_track->offset
|| (cue->curr_track_idx < cue->track_count - 1
&& id3->elapsed >= (cue->curr_track+1)->offset)))
{
cue_find_current_track(cue, id3->elapsed);
cue_spoof_id3(cue, id3);
return true;
}
return false;
}
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