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rockbox/apps/cuesheet.c
Nicolas Pennequin 9e8045cc80 Fix a possible crash in the cuesheet code if the filename lacks a slash, which happens for some reason I don't quite understand yet. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16229 a1c6a512-1295-4272-9138-f99709370657
2008-02-05 20:00:14 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 Nicolas Pennequin, Jonathan Gordon
*
* 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.
*
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <atoi.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 "splash.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"
struct cuesheet *curr_cue;
struct cuesheet *temp_cue;
#if CONFIG_CODEC != SWCODEC
/* special trickery because the hwcodec playback engine is in firmware/ */
static bool cuesheet_handler(const char *filename)
{
return cuesheet_is_enabled() && look_for_cuesheet_file(filename, NULL);
}
#endif
void cuesheet_init(void)
{
if (global_settings.cuesheet) {
curr_cue = (struct cuesheet *)buffer_alloc(sizeof(struct cuesheet));
temp_cue = (struct cuesheet *)buffer_alloc(sizeof(struct cuesheet));
#if CONFIG_CODEC != SWCODEC
audio_set_cuesheet_callback(cuesheet_handler);
#endif
} else {
curr_cue = NULL;
temp_cue = NULL;
}
}
bool cuesheet_is_enabled(void)
{
return (curr_cue != NULL);
}
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;
}
strncpy(cuepath, trackpath, MAX_PATH);
dot = strrchr(cuepath, '.');
strcpy(dot, ".cue");
int fd = open(cuepath,O_RDONLY);
if (fd < 0)
{
strcpy(cuepath, CUE_DIR);
strcat(cuepath, slash);
char *dot = strrchr(cuepath, '.');
strcpy(dot, ".cue");
fd = open(cuepath,O_RDONLY);
if (fd < 0)
{
if (found_cue_path)
found_cue_path = NULL;
return false;
}
}
close(fd);
if (found_cue_path)
strncpy(found_cue_path, cuepath, MAX_PATH);
return true;
}
static char *skip_whitespace(char* buf)
{
char *r = buf;
while (*r && isspace(*r))
r++;
return r;
}
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;
DEBUGF("cue parse\n");
int fd = open(file,O_RDONLY);
if (fd < 0)
{
/* couln't open the file */
return false;
}
/* 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) {
dest = iso_decode(string, dest, -1, MIN(strlen(string), MAX_NAME));
*dest = '\0';
}
}
}
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')
strncpy(cue->tracks[i].performer, cue->performer, MAX_NAME);
if (*(cue->tracks[i].songwriter) == '\0')
strncpy(cue->tracks[i].songwriter, cue->songwriter, MAX_NAME);
}
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)
{
struct cuesheet *cue = (struct cuesheet *)data;
if (selected_item & 1)
snprintf(buffer, MAX_PATH, "%s",
cue->tracks[selected_item/2].title);
else
snprintf(buffer, MAX_PATH, "%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);
gui_synclist_set_nb_items(&lists, 2*cue->track_count);
gui_synclist_set_title(&lists, title, 0);
if (id3 && *id3->path && strcmp(id3->path, "No file!"))
{
look_for_cuesheet_file(id3->path, cuepath);
}
if (id3 && id3->cuesheet_type && !strcmp(cue->path, cuepath))
{
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_type && !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)
{
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)
{
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
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