apps/hosted/notification.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2010 Thomas Martitz
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include <jni.h>
  23 #include <stdio.h>
  24 #include <sys/mman.h>
  25 #include "notification.h"
  26 #include "appevents.h"
  27 #include "metadata.h"
  28 #include "albumart.h"
  29 #include "misc.h"
  30 #include "thread.h"
  31 #include "debug.h"
  32
  33 extern JNIEnv *env_ptr;
  34 extern jclass RockboxService_class;
  35 extern jobject RockboxService_instance;
  36
  37 static jmethodID updateNotification, finishNotification;
  38 static jobject NotificationManager_instance;
  39 static jstring title, artist, album, albumart;
  40
  41 /* completely arbitrary dimensions. neded for find_albumart() */
  42 static const struct dim dim = { .width = 200, .height = 200 };
  43 #define NZV(a) (a && a[0])
  44
  45 /*
  46  * notify about track change, and show track info */
  47 static void track_changed_callback(void *param)
  48 {
  49     struct mp3entry* id3 = (struct mp3entry*)param;
  50     JNIEnv e = *env_ptr;
  51     if (id3)
  52     {
  53         /* passing NULL to DeleteLocalRef() is OK */
  54         e->DeleteLocalRef(env_ptr, title);
  55         e->DeleteLocalRef(env_ptr, artist);
  56         e->DeleteLocalRef(env_ptr, album);
  57         e->DeleteLocalRef(env_ptr, albumart);
  58
  59         char buf[200];
  60         const char * ptitle = id3->title;
  61         if (!ptitle && *id3->path)
  62         {   /* pass the filename as title if id3 info isn't available */
  63             ptitle = strip_extension(buf, sizeof(buf), strrchr(id3->path,'/') + 1);
  64         }
  65
  66         title = e->NewStringUTF(env_ptr, ptitle ?: "");
  67         artist = e->NewStringUTF(env_ptr, id3->artist ?: "");
  68         album = e->NewStringUTF(env_ptr, id3->album ?: "");
  69
  70         albumart = NULL;
  71         if (id3->embed_albumart && id3->albumart.type == AA_TYPE_JPG)
  72         {   /* extract albumart to a temporary file using mmap() */
  73             snprintf(buf, sizeof(buf), "/sdcard/rockbox/.temp_albumart_%d.jpg",
  74                      thread_self());
  75             int dst_fd = creat(buf, 0666);
  76             if (dst_fd >= 0)
  77             {
  78                 int src_fd = open(id3->path, O_RDONLY);
  79                 off_t o_pos = id3->albumart.pos;
  80                 off_t pa_pos = o_pos & ~(sysconf(_SC_PAGE_SIZE) - 1);
  81                 if (src_fd >= 0)
  82                 {   /* align to page boundary */
  83                     int pos_diff = o_pos - pa_pos;
  84                     unsigned char* p = mmap(NULL, id3->albumart.size + pos_diff,
  85                                         PROT_READ, MAP_SHARED, src_fd, pa_pos);
  86                     if (p != MAP_FAILED)
  87                     {
  88                         write(dst_fd, p + pos_diff, id3->albumart.size);
  89                         munmap(p, id3->albumart.size + pos_diff);
  90                         albumart = e->NewStringUTF(env_ptr, buf);
  91                     }
  92                     close(src_fd);
  93                 }
  94                 close(dst_fd);
  95             }
  96         }
  97         else if (find_albumart(id3, buf, sizeof(buf), &dim))
  98         {
  99             albumart = e->NewStringUTF(env_ptr, buf);
 100         }
 101
 102         e->CallVoidMethod(env_ptr, NotificationManager_instance,
 103                       updateNotification, title, artist, album, albumart);
 104     }
 105 }
 106
 107 /*
 108  * notify about track finishing */
 109 static void track_finished_callback(void *param)
 110 {
 111     (void)param;
 112     JNIEnv e = *env_ptr;
 113     e->CallVoidMethod(env_ptr, NotificationManager_instance,
 114                       finishNotification);
 115
 116     /* delete temporary albumart file */
 117     char buf[MAX_PATH];
 118     snprintf(buf, sizeof(buf), "/sdcard/rockbox/.temp_albumart_%d.jpg",
 119                      thread_self());
 120     unlink(buf);
 121 }
 122
 123 void notification_init(void)
 124 {
 125     JNIEnv e = *env_ptr;
 126     jfieldID nNM = e->GetFieldID(env_ptr, RockboxService_class,
 127                     "fg_runner", "Lorg/rockbox/Helper/RunForegroundManager;");
 128     NotificationManager_instance = e->GetObjectField(env_ptr,
 129                                                 RockboxService_instance, nNM);
 130     if (NotificationManager_instance == NULL)
 131     {
 132         DEBUGF("Failed to get RunForegroundManager instance. Performance will be bad");
 133         return;
 134     }
 135
 136     jclass class = e->GetObjectClass(env_ptr, NotificationManager_instance);
 137     updateNotification = e->GetMethodID(env_ptr, class, "updateNotification",
 138                                          "(Ljava/lang/String;"
 139                                          "Ljava/lang/String;"
 140                                          "Ljava/lang/String;"
 141                                          "Ljava/lang/String;)V");
 142     finishNotification = e->GetMethodID(env_ptr, class, "finishNotification",
 143                                         "()V");
 144
 145     add_event(PLAYBACK_EVENT_TRACK_CHANGE, false, track_changed_callback);
 146     add_event(PLAYBACK_EVENT_TRACK_FINISH, false, track_finished_callback);
 147 }