mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-28 10:40:39 +00:00
411 lines
9.6 KiB
C
411 lines
9.6 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2011-2016 - Daniel De Matteis
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* Copyright (C) 2014-2016 - Jean-André Santoni
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <ctype.h>
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#include <compat/strcasestr.h>
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#include <compat/strl.h>
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#include <file/file_path.h>
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#include <retro_endianness.h>
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#include <retro_file.h>
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#include <string/stdstring.h>
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#include "tasks_internal.h"
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#ifdef HAVE_LIBRETRODB
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#include "../database_info.h"
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#endif
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#include "../dir_list_special.h"
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#include "../msg_hash.h"
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#include "../general.h"
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#include "../verbosity.h"
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#define MAGIC_LEN 16
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#define MAX_TOKEN_LEN 255
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#ifdef MSB_FIRST
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#define MODETEST_VAL 0x00ffffff
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#else
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#define MODETEST_VAL 0xffffff00
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#endif
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struct magic_entry
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{
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const char *system_name;
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const char *magic;
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};
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static struct magic_entry MAGIC_NUMBERS[] = {
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{"ps1", "\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\x02\x00\x02\x00"},
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{"pcecd", "\x82\xb1\x82\xcc\x83\x76\x83\x8d\x83\x4f\x83\x89\x83\x80\x82\xcc\x92"},
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{"scd", "\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\x02\x00\x01\x53"},
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{NULL, NULL}
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};
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static ssize_t get_token(RFILE *fd, char *token, size_t max_len)
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{
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char *c = token;
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ssize_t len = 0;
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int in_string = 0;
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while (1)
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{
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int rv = retro_fread(fd, c, 1);
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if (rv == 0)
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return 0;
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if (rv < 1)
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{
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switch (errno)
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{
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case EINTR:
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case EAGAIN:
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continue;
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default:
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return -errno;
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}
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}
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switch (*c)
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{
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case ' ':
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case '\t':
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case '\r':
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case '\n':
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if (c == token)
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continue;
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if (!in_string)
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{
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*c = '\0';
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return len;
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}
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break;
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case '\"':
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if (c == token)
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{
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in_string = 1;
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continue;
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}
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*c = '\0';
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return len;
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}
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len++;
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c++;
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if (len == (ssize_t)max_len)
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{
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*c = '\0';
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return len;
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}
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}
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}
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static int find_token(RFILE *fd, const char *token)
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{
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int tmp_len = strlen(token);
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char *tmp_token = (char*)calloc(tmp_len+1, 1);
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if (!tmp_token)
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return -1;
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while (strncmp(tmp_token, token, tmp_len) != 0)
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{
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if (get_token(fd, tmp_token, tmp_len) <= 0)
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return -1;
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}
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free(tmp_token);
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return 0;
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}
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static int detect_ps1_game_sub(const char *track_path,
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char *game_id, int sub_channel_mixed)
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{
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uint8_t* tmp;
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uint8_t buffer[2048 * 2];
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int skip, frame_size, is_mode1, cd_sector;
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RFILE *fp = retro_fopen(track_path, RFILE_MODE_READ, -1);
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if (!fp)
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return 0;
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is_mode1 = 0;
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retro_fseek(fp, 0, SEEK_END);
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if (!sub_channel_mixed)
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{
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if (!(retro_ftell(fp) & 0x7FF))
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{
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unsigned int mode_test = 0;
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retro_fseek(fp, 0, SEEK_SET);
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retro_fread(fp, &mode_test, 4);
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if (mode_test != MODETEST_VAL)
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is_mode1 = 1;
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}
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}
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skip = is_mode1? 0: 24;
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frame_size = sub_channel_mixed? 2448: is_mode1? 2048: 2352;
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retro_fseek(fp, 156 + skip + 16 * frame_size, SEEK_SET);
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retro_fread(fp, buffer, 6);
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cd_sector = buffer[2] | (buffer[3] << 8) | (buffer[4] << 16);
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retro_fseek(fp, skip + cd_sector * frame_size, SEEK_SET);
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retro_fread(fp, buffer, 2048 * 2);
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tmp = buffer;
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while (tmp < (buffer + 2048 * 2))
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{
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if (!*tmp)
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return 0;
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if (!strncasecmp((const char*)(tmp + 33), "SYSTEM.CNF;1", 12))
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break;
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tmp += *tmp;
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}
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if(tmp >= (buffer + 2048 * 2))
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return 0;
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cd_sector = tmp[2] | (tmp[3] << 8) | (tmp[4] << 16);
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retro_fseek(fp, 13 + skip + cd_sector * frame_size, SEEK_SET);
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retro_fread(fp, buffer, 256);
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tmp = (uint8_t*)strrchr((const char*)buffer, '\\');
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if(!tmp)
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tmp = buffer;
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else
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tmp++;
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*game_id++ = toupper(*tmp++);
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*game_id++ = toupper(*tmp++);
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*game_id++ = toupper(*tmp++);
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*game_id++ = toupper(*tmp++);
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*game_id++ = '-';
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tmp++;
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*game_id++ = *tmp++;
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*game_id++ = *tmp++;
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*game_id++ = *tmp++;
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tmp++;
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*game_id++ = *tmp++;
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*game_id++ = *tmp++;
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*game_id = 0;
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retro_fclose(fp);
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return 1;
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}
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int detect_ps1_game(const char *track_path, char *game_id)
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{
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if (detect_ps1_game_sub(track_path, game_id, 0))
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return 1;
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return detect_ps1_game_sub(track_path, game_id, 1);
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}
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int detect_psp_game(const char *track_path, char *game_id)
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{
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bool rv = false;
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unsigned pos;
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RFILE *fd = retro_fopen(track_path, RFILE_MODE_READ, -1);
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if (!fd)
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{
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RARCH_LOG("Could not open data track: %s\n", strerror(errno));
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return -errno;
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}
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for (pos = 0; pos < 100000; pos++)
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{
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retro_fseek(fd, pos, SEEK_SET);
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if (retro_fread(fd, game_id, 5) > 0)
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{
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game_id[5] = '\0';
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if (string_is_equal(game_id, "ULES-")
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|| string_is_equal(game_id, "ULUS-")
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|| string_is_equal(game_id, "ULJS-")
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|| string_is_equal(game_id, "ULEM-")
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|| string_is_equal(game_id, "ULUM-")
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|| string_is_equal(game_id, "ULJM-")
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|| string_is_equal(game_id, "UCES-")
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|| string_is_equal(game_id, "UCUS-")
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|| string_is_equal(game_id, "UCJS-")
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|| string_is_equal(game_id, "UCAS-")
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|| string_is_equal(game_id, "NPEH-")
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|| string_is_equal(game_id, "NPUH-")
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|| string_is_equal(game_id, "NPJH-")
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|| string_is_equal(game_id, "NPEG-")
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|| string_is_equal(game_id, "NPUG-")
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|| string_is_equal(game_id, "NPJG-")
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|| string_is_equal(game_id, "NPHG-")
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|| string_is_equal(game_id, "NPEZ-")
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|| string_is_equal(game_id, "NPUZ-")
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|| string_is_equal(game_id, "NPJZ-")
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)
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{
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retro_fseek(fd, pos, SEEK_SET);
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if (retro_fread(fd, game_id, 10) > 0)
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{
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#if 0
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game_id[4] = '-';
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game_id[8] = game_id[9];
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game_id[9] = game_id[10];
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#endif
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game_id[10] = '\0';
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rv = true;
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}
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break;
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}
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}
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else
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break;
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}
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retro_fclose(fd);
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return rv;
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}
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int detect_system(const char *track_path, int32_t offset,
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const char **system_name)
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{
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int rv;
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char magic[MAGIC_LEN];
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int i;
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RFILE *fd = retro_fopen(track_path, RFILE_MODE_READ, -1);
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if (!fd)
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{
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RARCH_LOG("Could not open data track of file '%s': %s\n",
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track_path, strerror(errno));
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rv = -errno;
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goto clean;
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}
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retro_fseek(fd, offset, SEEK_SET);
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if (retro_fread(fd, magic, MAGIC_LEN) < MAGIC_LEN)
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{
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RARCH_LOG("Could not read data from file '%s' at offset %d: %s\n",
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track_path, offset, strerror(errno));
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rv = -errno;
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goto clean;
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}
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RARCH_LOG("Comparing with known magic numbers...\n");
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for (i = 0; MAGIC_NUMBERS[i].system_name != NULL; i++)
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{
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if (memcmp(MAGIC_NUMBERS[i].magic, magic, MAGIC_LEN) == 0)
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{
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*system_name = MAGIC_NUMBERS[i].system_name;
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rv = 0;
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goto clean;
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}
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}
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retro_fseek(fd, 0x8008, SEEK_SET);
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if (retro_fread(fd, magic, 8) > 0)
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{
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magic[8] = '\0';
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if (string_is_equal(magic, "PSP GAME"))
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{
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*system_name = "psp\0";
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rv = 0;
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goto clean;
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}
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}
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RARCH_LOG("Could not find compatible system\n");
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rv = -EINVAL;
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clean:
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retro_fclose(fd);
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return rv;
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}
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int find_first_data_track(const char *cue_path,
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int32_t *offset, char *track_path, size_t max_len)
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{
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int rv, m, s, f;
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char tmp_token[MAX_TOKEN_LEN];
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char cue_dir[PATH_MAX_LENGTH];
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RFILE *fd;
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strlcpy(cue_dir, cue_path, sizeof(cue_dir));
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path_basedir(cue_dir);
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fd = retro_fopen(cue_path, RFILE_MODE_READ, -1);
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if (!fd)
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{
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RARCH_LOG("Could not open CUE file '%s': %s\n", cue_path,
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strerror(errno));
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return -errno;
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}
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RARCH_LOG("Parsing CUE file '%s'...\n", cue_path);
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while (get_token(fd, tmp_token, MAX_TOKEN_LEN) > 0)
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{
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if (string_is_equal(tmp_token, "FILE"))
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{
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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fill_pathname_join(track_path, cue_dir, tmp_token, max_len);
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}
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else if (string_is_equal_noncase(tmp_token, "TRACK"))
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{
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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if (string_is_equal_noncase(tmp_token, "AUDIO"))
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continue;
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find_token(fd, "INDEX");
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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get_token(fd, tmp_token, MAX_TOKEN_LEN);
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if (sscanf(tmp_token, "%02d:%02d:%02d", &m, &s, &f) < 3)
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{
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RARCH_LOG("Error parsing time stamp '%s'\n", tmp_token);
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return -errno;
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}
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*offset = ((m * 60) * (s * 75) * f) * 25;
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RARCH_LOG("Found 1st data track on file '%s+%d'\n",
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track_path, *offset);
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rv = 0;
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goto clean;
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}
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}
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rv = -EINVAL;
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clean:
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retro_fclose(fd);
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return rv;
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}
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