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https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-10 21:05:12 +01:00
[libretro] added support for disk control interface and m3u file lists (allow disk swapping in multi-disk CD games)
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ekeeke
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9630e59552
commit
82c4821503
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@ -1817,6 +1817,143 @@ void ROMCheatUpdate(void)
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}
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}
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/****************************************************************************
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* Disk control interface
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****************************************************************************/
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#define MAX_DISKS 4
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static int disk_index;
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static int disk_count;
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static char *disk_info[MAX_DISKS];
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static bool disk_set_eject_state(bool ejected)
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{
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if (system_hw != SYSTEM_MCD)
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return false;
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if (ejected)
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{
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cdd.status = CD_OPEN;
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scd.regs[0x36>>1].byte.h = 0x01;
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}
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else if (cdd.status == CD_OPEN)
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{
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cdd.status = cdd.loaded ? CD_TOC : NO_DISC;
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}
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return true;
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}
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static bool disk_get_eject_state(void)
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{
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if (system_hw != SYSTEM_MCD)
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return false;
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return (cdd.status == CD_OPEN);
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}
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static unsigned int disk_get_image_index(void)
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{
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if ((system_hw != SYSTEM_MCD) || !cdd.loaded)
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return disk_count;
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return disk_index;
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}
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static bool disk_set_image_index(unsigned int index)
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{
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char header[0x210];
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if (system_hw != SYSTEM_MCD)
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return false;
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if (index >= disk_count)
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{
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cdd.loaded = 0;
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return true;
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}
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if (disk_info[index] == NULL)
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return false;
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cdd_load(disk_info[index], header);
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if (!cdd.loaded)
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return false;
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disk_index = index;
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return true;
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}
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static unsigned int disk_get_num_images(void)
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{
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return disk_count;
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}
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static bool disk_replace_image_index(unsigned index, const struct retro_game_info *info)
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{
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if (system_hw != SYSTEM_MCD)
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return false;
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if (index >= disk_count)
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return false;
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if (disk_info[index] != NULL)
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free(disk_info[index]);
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disk_info[index] = NULL;
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if (info != NULL)
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{
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if (info->path == NULL)
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return false;
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disk_info[index] = strdup(info->path);
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if (index == disk_index)
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return disk_set_image_index(index);
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}
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else
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{
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int i = index;
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while (i < (disk_count-1))
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{
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disk_info[i] = disk_info[i+1];
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disk_info[i+1] = NULL;
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}
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disk_count--;
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if (index < disk_index)
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disk_index--;
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}
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return true;
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}
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static bool disk_add_image_index(void)
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{
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if (system_hw != SYSTEM_MCD)
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return false;
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if (disk_count >= MAX_DISKS)
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return false;
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disk_count++;
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return true;
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}
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static struct retro_disk_control_callback disk_ctrl =
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{
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disk_set_eject_state,
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disk_get_eject_state,
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disk_get_image_index,
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disk_set_image_index,
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disk_get_num_images,
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disk_replace_image_index,
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disk_add_image_index
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};
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/************************************
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* libretro implementation
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************************************/
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@ -2048,7 +2185,7 @@ void retro_get_system_info(struct retro_system_info *info)
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#define GIT_VERSION ""
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#endif
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info->library_version = "v1.7.4" GIT_VERSION;
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info->valid_extensions = "mdx|md|smd|gen|bin|cue|iso|chd|sms|gg|sg";
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info->valid_extensions = "m3u|mdx|md|smd|gen|bin|cue|iso|chd|sms|gg|sg";
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info->block_extract = false;
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info->need_fullpath = true;
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}
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@ -2362,11 +2499,105 @@ bool retro_load_game(const struct retro_game_info *info)
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log_cb(RETRO_LOG_INFO, "Sega/Mega CD RAM CART is located at: %s\n", CART_BRAM);
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}
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g_rom_data = info->data;
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g_rom_data = (void *)info->data;
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g_rom_size = info->size;
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if (!load_rom((char *)info->path))
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/* Clear disk interface (already done in retro_unload_game but better be safe) */
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disk_count = 0;
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disk_index = 0;
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for (i=0; i<MAX_DISKS; i++)
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{
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if (disk_info[i] != NULL)
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{
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free(disk_info[i]);
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disk_info[i] = NULL;
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}
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}
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/* M3U file list support */
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if ((strlen(info->path) > 4) && !strncmp(info->path + strlen(info->path) - 4, ".m3u", 4))
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{
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RFILE *fd = filestream_open(info->path, RETRO_VFS_FILE_ACCESS_READ, RETRO_VFS_FILE_ACCESS_HINT_NONE);
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if (fd)
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{
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int len;
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char linebuf[512];
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while ((filestream_gets(fd, linebuf, 512) != NULL) && (disk_count < MAX_DISKS))
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{
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/* skip commented lines */
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if (linebuf[0] != '#')
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{
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len = strlen(linebuf);
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if (len > 0)
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{
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/* remove end-of-line character */
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if (linebuf[len-1] == '\n')
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{
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linebuf[len-1] = 0;
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len--;
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}
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/* remove carriage-return character */
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if (len && (linebuf[len-1] == '\r'))
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{
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linebuf[len-1] = 0;
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len--;
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}
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/* append file path to disk image file name */
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disk_info[disk_count] = malloc(strlen(g_rom_dir) + len + 2);
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if (disk_info[disk_count] != NULL)
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{
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/* add file to disk interface */
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sprintf(disk_info[disk_count], "%s%c%s", g_rom_dir, slash, linebuf);
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disk_count++;
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if (log_cb)
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log_cb(RETRO_LOG_INFO, "Disk #%d added from M3U file list: %s\n", disk_count, disk_info[disk_count-1]);
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}
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}
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}
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}
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}
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/* automatically try to load first disk if at least one file was added to disk interface from M3U file list */
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if (disk_count > 0)
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{
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if (!load_rom(disk_info[0]))
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{
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if (log_cb)
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log_cb(RETRO_LOG_ERROR, "Could not load %s from M3U file list (%d)\n", disk_info[0], size);
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/* clear initialized disk interface before returning an error */
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for (i=0; i<disk_count; i++)
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{
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if (disk_info[i] != NULL)
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{
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free(disk_info[i]);
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disk_info[i] = NULL;
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}
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}
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disk_count = 0;
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return false;
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}
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}
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else
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{
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/* error adding disks from M3U */
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return false;
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}
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}
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else
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{
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if (load_rom((char *)info->path) <= 0)
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return false;
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/* automatically add loaded CD to disk interface */
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if ((system_hw == SYSTEM_MCD) && cdd.loaded)
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{
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disk_count = 1;
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disk_info[0] = strdup(info->path);
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}
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}
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if ((config.bios & 1) && !(system_bios & SYSTEM_MD))
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{
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@ -2417,6 +2648,19 @@ bool retro_load_game_special(unsigned game_type, const struct retro_game_info *i
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void retro_unload_game(void)
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{
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/* Clear disk interface */
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int i;
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disk_count = 0;
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disk_index = 0;
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for (i=0; i<MAX_DISKS; i++)
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{
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if (disk_info[i] != NULL)
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{
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free(disk_info[i]);
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disk_info[i] = NULL;
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}
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}
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if (system_hw == SYSTEM_MCD)
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bram_save();
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@ -2504,6 +2748,7 @@ void retro_init(void)
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check_system_specs();
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environ_cb(RETRO_ENVIRONMENT_SET_SERIALIZATION_QUIRKS, &serialization_quirks);
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environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_ctrl);
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}
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void retro_deinit(void)
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