mp3 support for playing background music

game/globals.h

@@ -8,6 +8,7 @@
 #include <stdlib.h>
 #include <malloc.h>
 #include <libs/memman.h>
+#include <libs/music.h>
 
 #define POCET_POSTAV 6
 #define HODINA 360
@@ -1448,12 +1449,15 @@ void show_textured_button(int x,int y,int xs,int ys,int texture,CTL3D *border3d)
 extern short sample_volume;           //hlastitost samplu
 extern char **sound_table;
 
+
+
 void init_tracks(void);
 void recalc_volumes(int sector,int side);
 void play_effekt(int x,int y,int xd,int yd,int sector, int side,const TMA_SOUND *p);
+void change_music(const char *name);
+char resolve_music_source(const char *name, TMUSIC_SOURCE *new_source, TMUSIC_SOURCE_TYPE *new_type);
 void create_playlist(char *playlist);
 const char *get_next_music_from_playlist(void);
-const char * end_of_song_callback(void *ctx);
 void purge_playlist(void);
 void play_sample_at_sector(int sample,int listener,int source,int track, char loop);
 void play_sample_at_channel(int sample,int channel,int vol);
@@ -1462,7 +1466,7 @@ char test_playing(int track);
 void stop_track_free(int track);
 void mute_all_tracks(char all);
 void kill_all_sounds(void);
-void create_sound_table(char *template,int32_t size);
+void create_sound_table(char *t,int32_t size);
 void create_sound_table_old(void);
 void start_play_flute(char );
 void stop_play_flute(void);

game/realgame.c

@@ -117,17 +117,6 @@ int32_t load_section(FILE *f,void **section, int *sct_type,int32_t *sect_size)
   return s;
   }
 */
-static void ddl_file_deleter(void *ctx) {
-    ablock_free(ctx);
-}
-
-TMPFILE_RD *open_ddl_file(const char *name, int group) {
-    int32_t size;
-    if (!test_file_exist(group, name)) return NULL;
-    const void *data = afile(name, group, &size);
-    if (!data) return NULL;
-    return temp_storage_from_binary(data, size, &ddl_file_deleter, (void *)data);
-}
 
 int32_t load_section_mem(TMPFILE_RD *f,void **section, int *sct_type,int32_t *sect_size) {
     int32_t s;

game/skeldal.c

@@ -103,7 +103,8 @@ const void *pcx_8bit_decomp(const void *p, int32_t *s, int h);
 const void *pcx_fade_decomp(const void *p, int32_t *s, int h);
 const void *load_text_decomp(const void *p, int32_t *s, int h);
 
-static const char *patch_file=NULL;
+static const char *patch_files[4]={NULL};
+
 int cur_page=0;
 
 TSTR_LIST cur_config=NULL;
@@ -530,6 +531,17 @@ void clrscr(void)
   }
 
 
+static void ddl_file_deleter(void *ctx) {
+    ablock_free(ctx);
+}
+
+TMPFILE_RD *open_ddl_file(const char *name, int group) {
+    int32_t size;
+    if (!test_file_exist(group, name)) return NULL;
+    const void *data = afile(name, group, &size);
+    if (!data) return NULL;
+    return temp_storage_from_binary(data, size, &ddl_file_deleter, (void *)data);
+}
 
 
 
@@ -538,18 +550,6 @@ void back_music(THE_TIMER *t)
   mix_back_sound(0);
   }
 
-/*void *anim_idle(EVENT_MSG *msg,void **usr)
-  {
-  usr;
-  if (msg->msg==E_TIMER) calc_animations();
-  return &anim_idle;
-  }*/
-
-/*void timer_error(void)
-  {
-  puts("\x7");
-  }
-*/
 void timming(EVENT_MSG *msg,void **data)
   {
   THE_TIMER *p,*q;
@@ -881,37 +881,6 @@ const void *boldcz;
 #define ERR_WINX 320
 #define ERR_WINY 100
 
-/*
-
-char device_error(int chyba,char disk,char info)
-  {
-  char c;
-  void *old;
-
-  old=_STACKLOW;
-  _STACKLOW=NULL;
-  chyba,disk,info;
-  curfont=&boldcz;
-  charcolors[0]=0xffff;
-  for(c=1;c<5;c++) charcolors[c]=0x7fff;
-  memcpy(buffer_2nd,screen,screen_buffer_size);
-  trans_bar(320-ERR_WINX/2,240-ERR_WINY/2,ERR_WINX,ERR_WINY,0);
-  curcolor=0x7fff;
-  rectangle(320-ERR_WINX/2,240-ERR_WINY/2,320+ERR_WINX/2,240+ERR_WINY/2,0x7fff);
-  set_aligned_position(320,230,1,1,texty[8]);outtext(texty[8]);
-  set_aligned_position(320,250,1,1,texty[9]);outtext(texty[9]);
-  showview(0,0,0,0);
-  do
-     {
-     c=getche();
-     }
-  while (c!=13 && c!=27);
-  memcpy(screen,buffer_2nd,screen_buffer_size);
-  showview(0,0,0,0);
-  _STACKLOW=old;
-  return (c==13?_ERR_RETRY:_ERR_FAIL);
-  }
-*/
 
 void init_DDL_manager() {
 
@@ -919,9 +888,14 @@ void init_DDL_manager() {
     ddlfile = local_strdup(ddlfile);
 
     init_manager();
-    if (patch_file && !add_patch_file(patch_file)) {
+    for (size_t sz = countof(patch_files); sz > 0;) {
-        display_error("Can't open resource file (adv_patch): %s", ddlfile);
+        --sz;
-        abort();
+        if (patch_files[sz]) {
+            if (!add_patch_file(patch_files[sz])) {
+                display_error("Can't open resource file (adv_patch): %s", patch_files[sz]);
+                abort();
+            }
+        }
     }
     const char *lang_fld = lang_get_folder();
     if (lang_fld) {
@@ -981,6 +955,12 @@ void show_loading_picture(char *filename)
   ablock_free(p);
   }
 
+char end_of_song_callback(void *, TMUSIC_SOURCE *s, TMUSIC_SOURCE_TYPE *t) {
+    const char *ms =  get_next_music_from_playlist();
+    return resolve_music_source(ms, s, t);
+}
+
+
 
 void init_skeldal(const INI_CONFIG *cfg)
   {
@@ -1173,121 +1153,7 @@ void enter_game(void)
   if (end==255) konec_hry();
   }
 
-/*int dos58(int mode);
-#pragma aux dos58=\
-  "mov  al,1"\
-  "mov  ah,58h"\
-  "int  21h"\
- parm[ebx] value [eax]
-*/
 
-/*
-static int do_config_skeldal(int num,int numdata,char *txt)
-  {
-  switch (num)
-     {
-     case 0:vmode=numdata;break;
-     case 1:zoom_speed(numdata);break;
-     case 2:turn_speed(numdata);break;
-     case 3:init_music_vol=numdata;break;
-     case 4:init_gfx_vol=numdata;break;
-     case 5:sscanf(txt,"%d %x %d %d",&snd_devnum,&snd_parm1,&snd_parm2,&snd_parm3);
-            sound_detection=0;
-            break;
-     case 6:snd_mixing=numdata;break;
-     case 7:strcopy_n(default_map,txt,20);default_map[19]='\0';break;
-     case 8:gamespeed=numdata;break;
-     case 9:level_preload=numdata;break;
-//     case 10:system(txt);break;
-     case 11:mman_patch=numdata;break;
-     case 12:skip_intro=numdata;break;
-     case 13:autosave_enabled=numdata;break;
-     case 14: debug_enabled=numdata;break;
-     case 15:full_video=numdata;break;
-		 case 16:patch_file=getmem(strlen(txt)+1);
-						 strcpy(patch_file,txt);
-						 txt=strchr(patch_file,'\n');if (txt!=NULL) txt[0]=0;
-						 break;
-     case 17:titles_on=numdata;break;
-     case 18:charmin=numdata;break;
-     case 19:charmax=numdata;break;
-	 case 20:game_extras=numdata;break;
-	 case 21:windowed=numdata;break;
-	 case 22:gamespeedbattle=numdata;break;
-	 case 23:windowedzoom=numdata;break;
-     case 24:monitor=numdata;break;
-     case 25:if (VERSIONNUM<numdata)
-               display_error("Pozor! Hra je starsi verze, nez vyzaduje dobrodruzstvi. Ve vlastnim zajmu si stahnete novou verzi, protoze toto dobrodruzstvi nemusi byt s aktualni verzi dohratelne");
-            break;
-     case 26:refresh=numdata;break;
-     default:num-=CESTY_POS;
-             gpathtable[num] = strdup(txt);
-             SEND_LOG("(GAME) Directory '%s' has been assigned to group nb. %d",txt,num);
-             break;
-
-     }
- return 0;
-  }
-*/
-/*
-static void config_skeldal(const char *line)
-  {
-  int ndata=0,i,maxi;
-
-  char *data=0;char *c;
-
-  c=strchr(line,' ');if (c==NULL) return;
-  c++;
-  maxi=strlen(c);
-  data=alloca(maxi+1);
-  strcpy(data,c);
-  while (maxi && (isspace(data[maxi-1]))) {
-      --maxi;
-      data[maxi]=0;
-  }
-  maxi=(sizeof(sinit)/sizeof(INIS));
-  for(i=0;i<maxi;i++) if (comcmp(line,sinit[i].heslo)) break;
-  if (i==maxi)
-     {
-     char s[256];
-     i=data-line;
-
-     strcpy(s,"Chyba v INI souboru: Neznama promenna - ");
-     strncat(s,line,i);
-     SEND_LOG("(ERROR) %s",s);
-     }
-  else
-     {
-     if (sinit[i].parmtype==INI_INT) if (sscanf(data,"%d",&ndata)!=1)
-        {
-        char s[256];
-
-        sprintf(s,"Chyba v INI souboru: Ocekava se ciselna hodnota\n%s\n",line);
-        SEND_LOG("(ERROR) %s",s);
-        }
-     do_config_skeldal(i,ndata,data);
-     }
-  }
-*/
-/*
-static void configure(char *filename)
-  {
-  SEND_LOG("(GAME) Reading config. file '%s'",filename);
-  cur_config=read_config(filename);
-  if (cur_config==NULL)
-     {
-     char s[256];
-
-     sprintf(s,"\nNemohu precist konfiguracni soubor \"%s\".\n",filename);
-     SEND_LOG("(ERROR) %s",s);
-     puts(s);
-     exit(1);
-     }
-
-  process_ini(cur_config,config_skeldal);
-
-  }
-*/
 static int update_config(void)
   {
 
@@ -1314,6 +1180,7 @@ void set_verify(char state);
 */
 void play_movie_seq(const char *s,int y)
   {
+   change_music(NULL);
   play_animation(s,0,y,0);
   }
 
@@ -1647,7 +1514,7 @@ const char *configure_pathtable(const INI_CONFIG *cfg) {
     if (defmap) {
         strcopy_n(default_map, defmap, sizeof(default_map));
     }
-    patch_file = ini_get_string(paths, "patch_file", NULL);
+    patch_files[0] = ini_get_string(paths, "patch_file", NULL);
     if (ini_get_boolean(paths, "patch_mode", 0)) {
         mman_patch = 1;
     }
@@ -1721,6 +1588,10 @@ int skeldal_entry_point(const SKELDAL_CONFIG *start_cfg)
       return 1;
   }
 
+  if (start_cfg->patch_file) {
+      patch_files[1] = start_cfg->patch_file;
+  }
+
   if (start_cfg->adventure_path) {
       TSTR_LIST adv_config=read_config(start_cfg->adventure_path);
       if (!adv_config) {

game/skeldal.h

@@ -12,6 +12,7 @@ typedef struct {
     const char *adventure_path;
     const char *config_path;
     const char *lang_path;
+    const char *patch_file;
 
 
 } SKELDAL_CONFIG;

game/sndandmus.c

@@ -498,9 +498,6 @@ void create_playlist(char *playlist)
   playing_track=-1;
   }
 
-const char * end_of_song_callback(void *ctx) {
-    return get_next_music_from_playlist();
-}
 const char *get_next_music_from_playlist()
   {
   int i,step;
@@ -520,10 +517,7 @@ const char *get_next_music_from_playlist()
      }
   while (step);
   playing_track=i;
-  const char *d = build_pathname(2, gpathtable[SR_MUSIC], cur_playlist[i]+1);
+  const char *d = cur_playlist[i]+1;
-  if (!check_file_exists(d)) {
-     return NULL;
-  }
   cur_playlist[i][0]=33;
   remain_play--;
   return d;
@@ -722,3 +716,37 @@ char enable_sound(char enbl)
   SEND_LOG("(SOUND) Sound status (en/dis) changed: new %d, old %d",enbl,save);
   return save;
   }
+
+
+void change_music(const char *name) {
+    TMUSIC_SOURCE src;
+    TMUSIC_SOURCE_TYPE t;
+    if (resolve_music_source(name, &src, &t)) {
+        play_music(&src, t);
+    } else {
+        stop_play_music();
+    }
+
+}
+
+static void music_destructor(TMUSIC_SOURCE *me) {
+    afile_mapped_free(me->data, me->size);
+}
+
+char resolve_music_source(const char *name, TMUSIC_SOURCE *new_source, TMUSIC_SOURCE_TYPE *new_type) {
+    if (name == NULL || !test_file_exist(SR_MUSIC, name)) return 0;
+    int32_t sz;
+    size_t l = strlen(name);
+    if (l<4) return 0;
+
+    if (istrcmp(name+l-4, ".MUS") == 0) *new_type = MUSIC_SOURCE_MUS;
+    else if (istrcmp(name+l-4, ".MP3") == 0) *new_type = MUSIC_SOURCE_MP3;
+    else return 0;
+
+    const void *v = afile_mapped(name, SR_MUSIC, &sz);
+    new_source->data = v;
+    new_source->size = sz;
+    new_source->destructor = music_destructor;
+    return 1;
+}
+

libs/CMakeLists.txt

@@ -14,6 +14,7 @@ SET(files basicobj.c
           wav_mem.c
           strlite.c
           cztable.c
+          minimp3.c
           music.cpp
           string_table.cpp )
 

libs/memman.c

@@ -334,6 +334,12 @@ int test_file_exist(int group,const char *filename)
     return 1;
   }
 
+int file_is_in_ddl(int group, const char *filename) {
+    THANDLE_DATA h;
+    return get_file_entry(group, filename, &h);
+
+}
+
 THANDLE_DATA *def_handle(int handle,const char *filename,ABLOCK_DECODEPROC decompress,char path)
   {
   THANDLE_DATA *h;
@@ -369,11 +375,11 @@ THANDLE_DATA *def_handle(int handle,const char *filename,ABLOCK_DECODEPROC decom
   return h;
   }
 
-const void *afile(const char *filename,int group,int32_t *blocksize)
+static const void *afile2(const char *filename,int group,int32_t *blocksize, char mapped)
   {
   char *d;
   char entr;
-  void *p;
+  const void *p;
 
   d=alloca(strlen(filename)+1);
   strcpy(d,filename);
@@ -388,18 +394,36 @@ const void *afile(const char *filename,int group,int32_t *blocksize)
 		 *blocksize = *szptr;
 		 return szptr+1;
      }
-  else if (mman_pathlist!=NULL)
+  else if (mman_pathlist!=NULL) {
-     {
       const char *name = build_pathname(2,mman_pathlist[group],d);
       size_t sz;
 
      SEND_LOG("(LOAD) Afile is loading file '%s' from disk (group %d)",d,group);
-     p=load_file(name, &sz);
+     if (mapped) {
-     *blocksize=sz;
+         const char *iname = file_icase_find(name);
+         p = map_file_to_memory(iname, &sz);
+         *blocksize = sz;
+
+     }
+     else {
+         p=load_file(name, &sz);
+         *blocksize=sz;
      }
-  else return NULL;
-  return p;
   }
+  else {
+      return NULL;
+  }
+  return p;
+}
+
+const void *afile(const char *filename,int group,int32_t *blocksize) {
+    return afile2(filename, group, blocksize, 0);
+}
+
+const void *afile_mapped(const char *filename,int group,int32_t *blocksize) {
+    return afile2(filename, group, blocksize, 1);
+}
+
 
 void *afile_copy(const char *filename,int group,int32_t *blocksize) {
     const void *ptr = afile(filename, group, blocksize);
@@ -721,3 +745,8 @@ int32_t get_handle_size(int handle)
 void ablock_free(const void *ptr) {
     if (need_to_be_free(ptr)) free((void *)ptr);
 }
+
+void afile_mapped_free(const void *ptr, int32_t sz) {
+    if (need_to_be_free(ptr)) unmap_file(ptr, sz);
+}
+

libs/memman.h

@@ -96,12 +96,18 @@ THANDLE_DATA *zneplatnit_block(int handle); //zneplatni data bloku
 THANDLE_DATA *get_handle(int handle); //vraci informace o rukojeti
 int find_handle(const char *name,ABLOCK_DECODEPROC decomp);   //hleda mezi rukojeti stejnou definici
 int test_file_exist(int group,const char *filename); //testuje zda soubor existuje v ramci mmanageru
+int file_is_in_ddl(int group, const char *filename); //testuje zde je soubor v DDL
 const void *afile(const char *filename,int group,int32_t *blocksize); //nahraje do pameti soubor registrovany v ramci mmanageru
 void *afile_copy(const char *filename,int group,int32_t *blocksize); //nahraje do pameti soubor registrovany v ramci mmanageru
 int32_t get_handle_size(int handle);
 //void get_mem_info(MEMORYSTATUS *mem);
 void ablock_free(const void *ptr);
 
+//access file using memory mapping feature
+const void *afile_mapped(const char *filename,int group,int32_t *blocksize);
+//free file memory opened by afile_mapped
+void afile_mapped_free(const void *ptr, int32_t sz);
+
 
 int read_group(int index);
 char add_patch_file(const char *filename);  //pripojuje zaplatu

libs/mgifmapmem.c

@@ -185,8 +185,7 @@ void BigPlayProc(MGIF_HEADER_T *hdr,int act,const void *data,int csize)
 void play_animation(const char *filename,char mode,int posy,char sound)
   {
   size_t sz;
-  void *mgf=map_file_to_memory(file_icase_find(filename), &sz);
+  const void *mgf=map_file_to_memory(file_icase_find(filename), &sz);
-  change_music(NULL);
   if (mgf==NULL) return;
   game_display_disable_crt_effect_temporary(1);
   PlayMGFFile(mgf,BigPlayProc,posy,mode & 0x80);

libs/minimp3.c

@@ -0,0 +1,3 @@
+#define MINIMP3_IMPLEMENTATION
+#define MINIMP3_ONLY_MP3
+#include "minimp3.h"

libs/music.cpp

@@ -1,8 +1,10 @@
 #include <string_view>
 
 #include "music.h"
+#include "minimp3.h"
 #include <platform/platform.h>
 
+#include "memman.h"
 #include <atomic>
 #include <cstddef>
 #include <cstdint>
@@ -10,30 +12,40 @@
 #include <string_view>
 #include <vector>
 #include <utility>
+#include <memory>
 
+struct MResDeleter {
+    TMUSIC_SOURCE src;
+    void operator()(const void *ptr) {
+        src.destructor(&src);
+    }
+};
+
+using MusicData = std::unique_ptr<const void, MResDeleter>;
 
 
 class MUSStreamParser: public IMusicStream {
 public:
 
-    MUSStreamParser(const char *name) {
+    MUSStreamParser(const TMUSIC_SOURCE *src)
-        _data = map_file_to_memory(file_icase_find(name), &sz);
+        :_mdata(src->data, {*src}) {
-        if (_data) {
+
-            _loaded = true;
+        if (_mdata) {
-            iter = reinterpret_cast<const uint8_t *>(_data);
+            _data = _mdata.get();
-            chans = read_short();
+            if (_data) {
-            freq = read_int();
+                _loaded = true;
-            iter += 4;
+                iter = reinterpret_cast<const uint8_t *>(_data);
-            blocks = read_int();
+                chans = read_short();
-            iter += 8;
+                freq = read_int();
-            btable = reinterpret_cast<const short *>(iter);
+                iter += 4;
-            iter += 512;
+                blocks = read_int();
+                iter += 8;
+                btable = reinterpret_cast<const short *>(iter);
+                iter += 512;
+            }
         }
     }
 
-    ~MUSStreamParser() {
-        if (_data) unmap_file(_data, sz);
-    }
     MUSStreamParser(const MUSStreamParser &) = delete;
     MUSStreamParser& operator=(const MUSStreamParser &) = delete;
 
@@ -60,8 +72,8 @@ public:
 
 protected:
     bool _loaded = false;
-    void *_data;
+    MusicData _mdata;
-    std::size_t sz;
+    const void *_data;
 
     std::int16_t chans;
     std::int32_t freq;
@@ -111,6 +123,85 @@ protected:
 
 };
 
+class MP3StreamParser: public IMusicStream {
+public:
+    MP3StreamParser(const TMUSIC_SOURCE *src)
+       :_data(src->data, {*src})
+       ,_mp3_size(src->size) {
+
+
+       if (_data && find_music_info()) {
+           _info.format = 2;
+           _loaded = true;
+           mp3dec_init(&dec);
+       }
+    }
+
+    virtual std::string_view read() override {
+        if (!_put_back_buffer.empty() || _eof) return std::exchange(_put_back_buffer, {});
+        while (_mp3_offset < _mp3_size) {
+            mp3dec_frame_info_t frame_info;
+            int samples = mp3dec_decode_frame(&dec,
+                    reinterpret_cast<const uint8_t *>(_data.get())+_mp3_offset,
+                    _mp3_size - _mp3_offset, pcm_buffer,&frame_info);
+
+           if (samples == 0) {
+               // Nenalezen platný frame, posuneme se o 1 bajt a zkusíme dál
+               _mp3_offset++;
+               continue;
+           }
+
+           _mp3_offset += frame_info.frame_bytes ;
+
+           size_t data_size = samples* frame_info.channels  * sizeof(mp3d_sample_t);
+
+           return std::string_view(reinterpret_cast<const char*>(pcm_buffer), data_size);
+        }
+        _eof = true;
+        return {};
+    }
+    virtual void put_back(std::string_view data) override {
+        _put_back_buffer = data;
+    }
+    virtual TMUSIC_STREAM_INFO get_info() const override {
+        return _info;
+    }
+
+    bool is_loaded() const {return _loaded;}
+
+protected:
+    MusicData _data;
+    size_t _mp3_size;
+    size_t _mp3_offset = 0;
+    TMUSIC_STREAM_INFO _info = {};
+    mp3dec_t dec{};
+
+    std::string_view _put_back_buffer = {};
+    mp3d_sample_t pcm_buffer[MINIMP3_MAX_SAMPLES_PER_FRAME] = {};
+    bool _eof = false;
+    bool _loaded = false;
+
+    bool find_music_info() {
+        mp3dec_t tmpdec{};
+        mp3dec_init(&tmpdec);
+        size_t ofs = 0;
+        size_t max_ofs = std::min<size_t>(_mp3_size,4096);
+        mp3dec_frame_info_t frame_info;
+        while (ofs < max_ofs) {
+            int samples = mp3dec_decode_frame(&tmpdec,
+                    reinterpret_cast<const uint8_t *>(_data.get())+ofs,
+                    _mp3_size-ofs, pcm_buffer, &frame_info);
+            if (samples > 0) {
+                _info.freq = frame_info.hz;
+                _info.channels = frame_info.channels;
+                return true;
+            }
+            ++ofs;
+        }
+        return false;
+    }
+};
+
 
 void music_close(TMUSIC_STREAM *stream) {
     if (stream) {
@@ -119,13 +210,31 @@ void music_close(TMUSIC_STREAM *stream) {
     }
 }
 
-TMUSIC_STREAM *music_open(const char *filename) {
+TMUSIC_STREAM *music_open_mus(const TMUSIC_SOURCE *src) {
-    MUSStreamParser *player =  new MUSStreamParser(filename);
+    auto player = new MUSStreamParser(src);
     if (player->is_loaded()) return player;
     delete player;
     return NULL;
 }
 
+TMUSIC_STREAM *music_open_mp3(const TMUSIC_SOURCE *src) {
+    auto player = new MP3StreamParser(src);
+    if (player->is_loaded()) return player;
+    delete player;
+    return NULL;
+
+}
+
+
+TMUSIC_STREAM *music_open(const TMUSIC_SOURCE *source, TMUSIC_SOURCE_TYPE t) {
+    if (t == MUSIC_SOURCE_MUS) {
+        return music_open_mus(source);
+    } else {
+        return music_open_mp3(source);
+    }
+}
+
+
 TMUSIC_STREAM_CHUNK music_read(TMUSIC_STREAM *stream) {
     TMUSIC_STREAM_CHUNK r = {NULL,0};
     if (stream) {
@@ -157,4 +266,3 @@ TMUSIC_STREAM_INFO music_get_info(const TMUSIC_STREAM *stream) {
         return r;
     }
 }
-

libs/music.h

@@ -5,6 +5,17 @@
 extern "C" {
 #endif
 
+typedef enum music_source_type {
+    MUSIC_SOURCE_MUS,
+    MUSIC_SOURCE_MP3
+} TMUSIC_SOURCE_TYPE;
+
+typedef struct music_source_t {
+    const void *data;
+    size_t size;
+    void (*destructor)(struct music_source_t *me);
+} TMUSIC_SOURCE;
+
 typedef struct music_stream_t {
     char dummy;
 } TMUSIC_STREAM;
@@ -23,8 +34,23 @@ typedef struct music_stream_chunk_t {
 
 
 
-///open music stream
+
-TMUSIC_STREAM *music_open(const char *filename);
+///open music stream MUS file
+/**
+ * @param source source descriptor - it is copied into reader
+ * @return music stream if valid, or NULL, if not
+ */
+TMUSIC_STREAM *music_open_mus(const TMUSIC_SOURCE *source);
+
+///open music stream MP3 file
+/**
+ * @param source source descriptor - it is copied into reader
+ * @return music stream if valid, or NULL, if not
+ */
+TMUSIC_STREAM *music_open_mp3(const TMUSIC_SOURCE *source);
+
+TMUSIC_STREAM *music_open(const TMUSIC_SOURCE *source, TMUSIC_SOURCE_TYPE type);
+
 ///retrieve information
 TMUSIC_STREAM_INFO music_get_info(const TMUSIC_STREAM *stream);
 
@@ -38,6 +64,7 @@ void music_put_back_chunk(TMUSIC_STREAM *stream, const TMUSIC_STREAM_CHUNK *chun
 void music_close(TMUSIC_STREAM *stream);
 
 
+
 #ifdef __cplusplus
 }
 

platform/linux/app_start.cpp

@@ -14,10 +14,11 @@ void show_help(const char *arg0) {
             "\n"
             "Usage:"
     );
-    printf("%s [-f <file>] [-a <file>] [-l <lang>] [-s <dir>] [-h]\n\n", arg0);
+    printf("%s [-f <file>] [-a <file>] [-p <file> ] [-l <lang>] [-s <dir>] [-h]\n\n", arg0);
 
     printf("-f <file>       path to configuration file\n"
            "-a <adv>        path for adventure file (.adv)\n"
+           "-p <file>       patch data with custom DDL\n"
            "-l <lang>       set language (cz|en)\n"
            "-s <directory>  generate string-tables (for localization) and exit\n"
            "-h              this help\n");
@@ -33,12 +34,14 @@ int main(int argc, char **argv) {
     std::string config_name = SKELDALINI;
     std::string adv_config_file;
     std::string gen_stringtable_path;
+    std::string patch;
     std::string lang;
-    for (int optchr = -1; (optchr = getopt(argc, argv, "hf:a:s:l:")) != -1; ) {
+    for (int optchr = -1; (optchr = getopt(argc, argv, "hf:a:s:l:p:")) != -1; ) {
         switch (optchr) {
             case 'f': config_name = optarg;break;
             case 'a': adv_config_file = optarg;break;
             case 'h': show_help(argv[0]);break;
+            case 'p': patch = optarg; break;
             case 'l': lang = optarg;break;
             case 's': gen_stringtable_path = optarg;break;
             default: show_help_short();
@@ -54,6 +57,7 @@ int main(int argc, char **argv) {
     cfg.adventure_path = adv_config_file.empty()?NULL:adv_config_file.c_str();
     cfg.config_path = config_name.c_str();
     cfg.lang_path = lang.empty()?NULL:lang.c_str();
+    cfg.patch_file = patch.empty()?NULL:patch.c_str();
     try {
 
         if (!gen_stringtable_path.empty()) {

platform/linux/map_file.cpp

@@ -13,7 +13,7 @@
 #include <errno.h>
 
 // Funkce pro mapování souboru do paměti
-void* map_file_to_memory(const char *name, size_t *sz) {
+const void* map_file_to_memory(const char *name, size_t *sz) {
     if (!name || !sz) {
         return NULL;
     }
@@ -49,13 +49,13 @@ void* map_file_to_memory(const char *name, size_t *sz) {
 }
 
 // Funkce pro zrušení mapování
-void unmap_file(void *ptr, size_t sz) {
+void unmap_file(const void *ptr, size_t sz) {
     if (!ptr || sz == 0) {
         return;
     }
 
     // Zrušení mapování
-    if (munmap(ptr, sz) == -1) {
+    if (munmap((void *)ptr, sz) == -1) {
-        perror("Chyba při rušení mapování");
+        perror("Failed to unmap file");
     }
 }

platform/linux/map_file.h

@@ -5,8 +5,8 @@
 extern "C" {
 #endif
 
-void *map_file_to_memory(const char *name, size_t *sz);
+const void *map_file_to_memory(const char *name, size_t *sz);
-void unmap_file(void *ptr, size_t sz);
+void unmap_file(const void *ptr, size_t sz);
 
 #ifdef __cplusplus
 }

platform/platform.h

@@ -82,8 +82,8 @@ char change_current_directory(const char *path);
 
 
 
-void *map_file_to_memory(const char *name, size_t *sz);
+const void *map_file_to_memory(const char *name, size_t *sz);
-void unmap_file(void *ptr, size_t sz);
+void unmap_file(const void *ptr, size_t sz);
 
 char copy_text_to_clipboard(const char *);
 

platform/sdl/sound.cpp

@@ -130,10 +130,10 @@ size_t copy_to_music_buffer(const void *data, size_t data_size) {
 }
 
 
-static const char * (*end_of_song_callback)(void *ctx) = NULL;
+static TEND_OF_SONG_CALLBACK end_of_song_callback;
 static void *end_of_song_callback_ctx = NULL;
 
-void set_end_of_song_callback(const char * (*cb)(void *), void *ctx) {
+void set_end_of_song_callback(TEND_OF_SONG_CALLBACK cb, void *ctx) {
     end_of_song_callback = cb;
     end_of_song_callback_ctx = ctx;
 }
@@ -191,9 +191,9 @@ void create_new_music_track(int freq, int buffsize) {
     music_buffer_write_pos = buffsize/2;
 }
 
-static std::unique_ptr<IMusicStream> load_music_ex(const char *name) {
+static std::unique_ptr<IMusicStream> load_music_ex(const TMUSIC_SOURCE *src, TMUSIC_SOURCE_TYPE type) {
-    if (name) {
+    if (src) {
-        TMUSIC_STREAM *stream = music_open(name);
+        TMUSIC_STREAM *stream = music_open(src, type);
         if (stream) {
             TMUSIC_STREAM_INFO nfo = music_get_info(stream);
             if (nfo.channels != 2) {
@@ -212,8 +212,10 @@ static std::unique_ptr<IMusicStream> load_music_ex(const char *name) {
 static void handle_end_of_song() {
     current_music.reset();
     if (end_of_song_callback != NULL) {
-        const char *new_music = end_of_song_callback(end_of_song_callback_ctx);
+        TMUSIC_SOURCE src;
-        current_music = load_music_ex(new_music);
+        TMUSIC_SOURCE_TYPE type;
+        char ok = end_of_song_callback(end_of_song_callback_ctx, &src, &type);
+        current_music = ok?load_music_ex(&src, type):std::unique_ptr<IMusicStream>{};
         if (current_music) {
             auto nfo = current_music->get_info();
             create_new_music_track(nfo.freq, BACK_BUFF_SIZE);
@@ -246,13 +248,16 @@ int mix_back_sound(int _) {
 
 }
 
-//int open_backsound(char *filename);
+void stop_play_music() {
-void change_music(const char *filename) {
     if (music_source) {
-        fade_music();
+       fade_music();
-        stop_music();
+       stop_music();
     }
-    current_music = load_music_ex(filename);
+}
+
+void play_music(const TMUSIC_SOURCE *source, TMUSIC_SOURCE_TYPE type) {
+    stop_play_music();
+    current_music = load_music_ex(source, type);
     if (current_music) {
         auto nfo = current_music->get_info();
         create_new_music_track(nfo.freq, BACK_BUFF_SIZE);
@@ -309,7 +314,7 @@ char set_snd_effect(AUDIO_PROPERTY funct,int data) {
         case SND_PING: break;
         case SND_GFX: sound_effect_volume = data/256.0;break;
         case SND_MUSIC: music_volume = data/128.0;update_music_volume();break;
-        case SND_GVOLUME: master_volume = data/512.0;update_music_volume();break;        
+        case SND_GVOLUME: master_volume = data/512.0;update_music_volume();break;
         case SND_SWAP: swap_channels = !!data;break;
         case SND_BASS: bass_boost = data/25.0;sound_mixer.set_bass(bass_boost);break;
         case SND_TREBL: treble_boost = data/25.0;sound_mixer.set_treble(treble_boost);break;

platform/sound.h

@@ -24,14 +24,19 @@ SND_MAXFUNCT} AUDIO_PROPERTY;
 
 void game_sound_init_device(const INI_CONFIG_SECTION *audio_section);
 
+
+typedef char (*TEND_OF_SONG_CALLBACK)(void *ctx, TMUSIC_SOURCE *, TMUSIC_SOURCE_TYPE *);
+
+
 char start_mixing();
 void stop_mixing();
 void play_sample(int channel,const void *sample,int32_t size,int32_t lstart,int32_t sfreq,int type);
 void set_channel_volume(int channel,int left,int right);
-void set_end_of_song_callback(const char * (*cb)(void *), void *ctx);
+void set_end_of_song_callback(TEND_OF_SONG_CALLBACK cb, void *ctx);
+void play_music(const TMUSIC_SOURCE *source, TMUSIC_SOURCE_TYPE type);
+void stop_play_music();
 void fade_music();
 int mix_back_sound(int synchro);
-void change_music(const char *filename);
 char get_channel_state(int channel);
 void get_channel_volume(int channel,int *left,int *right);
 void mute_channel(int channel);

platform/windows/app_start.cpp

@@ -11,7 +11,7 @@
 #include <shellapi.h>
 
 void show_help(std::ostream &out, const char *arg0) {
-    out << 
+    out <<
             "Brany Skeldalu (Gates of Skeldal) portable game player\n"
             "Copyright (c) 2025 Ondrej Novak. All rights reserved.\n\n"
             "This work is licensed under the terms of the MIT license.\n"
@@ -21,9 +21,10 @@ void show_help(std::ostream &out, const char *arg0) {
     out << arg0 << " [-f <file>] [-a <file>] [-l <lang>] [-s <dir>] [-h]\n\n";
     out << "-f <file>       path to configuration file\n"
            "-a <adv>        path for adventure file (.adv)\n"
+           "-p <file>       patch data with custom DDL\n"
            "-l <lang>       set language (cz|en)\n"
            "-s <directory>  generate string-tables (for localization) and exit\n"
-           "-h              this help\n";    
+           "-h              this help\n";
 }
 
 void show_help_short(std::ostream &out) {
@@ -31,20 +32,22 @@ void show_help_short(std::ostream &out) {
 }
 
 
-int main(int argc, char **argv) {    
+int main(int argc, char **argv) {
     std::string config_name = SKELDALINI;
     std::string adv_config_file;
     std::string gen_stringtable_path;
     std::string lang;
+    std::string patch;
     std::ostringstream console;
-    for (int optchr = -1; (optchr = getopt(argc, argv, "hf:a:s:l:")) != -1; ) {
+    for (int optchr = -1; (optchr = getopt(argc, argv, "hf:a:s:l:p:")) != -1; ) {
         switch (optchr) {
             case 'f': config_name = optarg;break;
             case 'a': adv_config_file = optarg;break;
             case 'h': show_help(console, argv[0]);break;
+            case 'p': patch = optarg; break;
             case 'l': lang = optarg;break;
             case 's': gen_stringtable_path = optarg;break;
-            default:  show_help_short(console);break;                    
+            default:  show_help_short(console);break;
         }
     }
 
@@ -64,6 +67,7 @@ int main(int argc, char **argv) {
     cfg.adventure_path = adv_config_file.empty()?NULL:adv_config_file.c_str();
     cfg.config_path = config_name.c_str();
     cfg.lang_path = lang.empty()?NULL:lang.c_str();
+    cfg.patch_file = patch.empty()?NULL:patch.c_str();
 
     {
         std::string msg = console.str();

platform/windows/map_file.cpp

@@ -12,7 +12,7 @@ extern "C" {
 #include <stdexcept>
 
 // Funkce pro mapování souboru do paměti
-void* map_file_to_memory_cpp(const char *name, size_t *sz) {
+const void* map_file_to_memory_cpp(const char *name, size_t *sz) {
     if (!name || !sz) {
         return NULL;
     }
@@ -26,7 +26,7 @@ void* map_file_to_memory_cpp(const char *name, size_t *sz) {
         throw std::runtime_error(std::string("failed to get size of file:").append(name));
     }
 
-    
+
 
     HANDLE hMapping = CreateFileMapping(h,NULL,PAGE_READONLY,0,0,NULL);
     if (hMapping == NULL || hMapping == INVALID_HANDLE_VALUE) {
@@ -40,16 +40,16 @@ void* map_file_to_memory_cpp(const char *name, size_t *sz) {
     if (mappedData == NULL) {
         throw std::runtime_error(std::string("Failed to map file:").append(name));
     }
-    
+
     *sz = fsize.LowPart;
     return mappedData;
 }
 
-void* map_file_to_memory(const char *name, size_t *sz) {
+const void* map_file_to_memory(const char *name, size_t *sz) {
     return map_file_to_memory_cpp(name, sz);
 }
 
 // Funkce pro zrušení mapování
-void unmap_file(void *ptr, size_t) {
+void unmap_file(const void *ptr, size_t) {
-    UnmapViewOfFile(ptr);
+    UnmapViewOfFile((void *)ptr);
 }

platform/windows/map_file.h

@@ -1,4 +1,4 @@
 #include <stddef.h>
 #include <stdint.h>
-void *map_file_to_memory(const char *name, size_t *sz);
+const void *map_file_to_memory(const char *name, size_t *sz);
-void unmap_file(void *ptr, size_t sz);
+void unmap_file(const void *ptr, size_t sz);

tools/CMakeLists.txt

@@ -1,4 +1,5 @@
 add_executable(ddl_ar ddl_ar.cpp ddl_ar_class.cpp)
 add_executable(pcx_diff_tool pcx_diff_tool.c)
+add_executable(deenc deenc.c)
 
 set_property(TARGET ddl_ar PROPERTY CXX_STANDARD 20)

tools/deenc.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[]) {
+    if (argc != 2) {
+        fprintf(stderr, "Usage: %s <file.ENC>\n", argv[0]);
+        return 1;
+    }
+
+    FILE *f = fopen(argv[1], "rb");
+    if (!f) {
+        perror("Can't open file");
+        return 1;
+    }
+
+    // Získání velikosti souboru
+    fseek(f, 0, SEEK_END);
+    long size = ftell(f);
+    rewind(f);
+
+    // Alokace bufferu
+    unsigned char *data = malloc(size);
+    if (!data) {
+        perror("Memory alloc error");
+        fclose(f);
+        return 1;
+    }
+
+    fread(data, 1, size, f);
+    fclose(f);
+
+    int last=0;
+    for (int i = 0; i < size; ++i) {
+        last = (last + data[i]) & 0xFF;
+        data[i] = last;
+    }
+
+    // Výstup na stdout
+    fwrite(data, 1, size, stdout);
+    free(data);
+
+    return 0;
+}