mirror of
https://github.com/libretro/RetroArch
synced 2024-07-08 12:15:49 +00:00
550 lines
18 KiB
C
550 lines
18 KiB
C
/* Copyright (C) 2010-2020 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (media_detect_cd.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <media/media_detect_cd.h>
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#include <streams/file_stream.h>
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#include <string/stdstring.h>
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#include <file/file_path.h>
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#include <retro_miscellaneous.h>
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/*#define MEDIA_CUE_PARSE_DEBUG*/
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static void media_zero_trailing_spaces(char *buf, size_t len)
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{
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int i;
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for (i = len - 1; i >= 0; i--)
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{
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if (buf[i] == ' ')
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buf[i] = '\0';
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else if (buf[i] != '\0')
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break;
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}
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}
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static bool media_skip_spaces(const char **buf, size_t len)
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{
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if (buf && *buf && **buf)
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{
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size_t i;
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for (i = 0; i < len; i++)
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{
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if ((*buf)[i] == ' ' || (*buf)[i] == '\t')
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continue;
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*buf += i;
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return true;
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}
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}
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return false;
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}
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/* Fill in "info" with detected CD info. Use this when you have a cue file and want it parsed to find the first data track and any pregap info. */
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bool media_detect_cd_info_cue(const char *path, media_detect_cd_info_t *info)
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{
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RFILE *file = NULL;
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char *line = NULL;
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char track_path[PATH_MAX_LENGTH] = {0};
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char track_abs_path[PATH_MAX_LENGTH] = {0};
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char track_mode[11] = {0};
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bool found_file = false;
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bool found_track = false;
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unsigned first_data_track = 0;
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uint64_t data_track_pregap_bytes = 0;
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if (string_is_empty(path) || !info)
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return false;
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if (!(file = filestream_open(path, RETRO_VFS_FILE_ACCESS_READ, 0)))
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{
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("[MEDIA] Could not open cue path for reading: %s\n", path);
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fflush(stdout);
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#endif
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return false;
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}
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while (!filestream_eof(file) && (line = filestream_getline(file)))
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{
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size_t len = 0;
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const char *command = NULL;
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if (string_is_empty(line))
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{
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free(line);
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continue;
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}
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len = strlen(line);
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command = line;
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media_skip_spaces(&command, len);
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if (!found_file && !strncasecmp(command, "FILE", 4))
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{
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const char *file = command + 4;
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media_skip_spaces(&file, len - 4);
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if (!string_is_empty(file))
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{
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const char *file_end = NULL;
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size_t file_len = 0;
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bool quoted = false;
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if (file[0] == '"')
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{
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quoted = true;
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file++;
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}
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if (quoted)
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file_end = strchr(file, '\"');
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else
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file_end = strchr(file, ' ');
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if (file_end)
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{
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file_len = file_end - file;
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memcpy(track_path, file, file_len);
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found_file = true;
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("Found file: %s\n", track_path);
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fflush(stdout);
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#endif
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}
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}
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}
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else if (found_file && !found_track && !strncasecmp(command, "TRACK", 5))
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{
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const char *track = command + 5;
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media_skip_spaces(&track, len - 5);
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if (!string_is_empty(track))
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{
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char *ptr = NULL;
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unsigned track_number = (unsigned)strtol(track, &ptr, 10);
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("Found track: %d\n", track_number);
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fflush(stdout);
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#endif
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track++;
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if (track[0] && track[0] != ' ' && track[0] != '\t')
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track++;
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if (!string_is_empty(track))
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{
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media_skip_spaces(&track, strlen(track));
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("Found track type: %s\n", track);
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fflush(stdout);
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#endif
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if (!strncasecmp(track, "MODE", 4))
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{
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first_data_track = track_number;
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found_track = true;
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strlcpy(track_mode, track, sizeof(track_mode));
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}
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else
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found_file = false;
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}
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}
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}
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else if (found_file && found_track && first_data_track && !strncasecmp(command, "INDEX", 5))
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{
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const char *index = command + 5;
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media_skip_spaces(&index, len - 5);
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if (!string_is_empty(index))
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{
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char *ptr = NULL;
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unsigned index_number = (unsigned)strtol(index, &ptr, 10);
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if (index_number == 1)
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{
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const char *pregap = index + 1;
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if (pregap[0] && pregap[0] != ' ' && pregap[0] != '\t')
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pregap++;
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if (!string_is_empty(pregap))
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{
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media_skip_spaces(&pregap, strlen(pregap));
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found_file = false;
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found_track = false;
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if (first_data_track && !string_is_empty(track_mode))
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{
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unsigned track_sector_size = 0;
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unsigned track_mode_number = 0;
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if (strlen(track_mode) == 10)
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{
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sscanf(track_mode, "MODE%d/%d", (int*)&track_mode_number, (int*)&track_sector_size);
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("Found track mode %d with sector size %d\n", track_mode_number, track_sector_size);
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fflush(stdout);
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#endif
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if ((track_mode_number == 1 || track_mode_number == 2) && track_sector_size)
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{
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unsigned min = 0;
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unsigned sec = 0;
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unsigned frame = 0;
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sscanf(pregap, "%02d:%02d:%02d", (int*)&min, (int*)&sec, (int*)&frame);
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if (min || sec || frame || strstr(pregap, "00:00:00"))
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{
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data_track_pregap_bytes = ((min * 60 + sec) * 75 + frame) * track_sector_size;
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("Found pregap of %02d:%02d:%02d (bytes: %" PRIu64 ")\n", min, sec, frame, data_track_pregap_bytes);
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fflush(stdout);
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#endif
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break;
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}
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}
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}
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}
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}
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}
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}
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}
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free(line);
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}
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filestream_close(file);
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if (!string_is_empty(track_path))
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{
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if (strstr(track_path, "/") || strstr(track_path, "\\"))
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{
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("using path %s\n", track_path);
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fflush(stdout);
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#endif
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return media_detect_cd_info(track_path, data_track_pregap_bytes, info);
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}
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fill_pathname_basedir(track_abs_path, path, sizeof(track_abs_path));
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strlcat(track_abs_path, track_path, sizeof(track_abs_path));
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("using abs path %s\n", track_abs_path);
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fflush(stdout);
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#endif
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return media_detect_cd_info(track_abs_path, data_track_pregap_bytes, info);
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}
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return true;
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}
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/* Fill in "info" with detected CD info. Use this when you want to open a specific track file directly, and the pregap is known. */
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bool media_detect_cd_info(const char *path, uint64_t pregap_bytes, media_detect_cd_info_t *info)
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{
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RFILE *file;
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if (string_is_empty(path) || !info)
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return false;
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if (!(file = filestream_open(path, RETRO_VFS_FILE_ACCESS_READ, 0)))
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{
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("[MEDIA] Could not open path for reading: %s\n", path);
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fflush(stdout);
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#endif
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return false;
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}
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{
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unsigned offset = 0;
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unsigned sector_size = 0;
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unsigned buf_size = 17 * 2352;
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char *buf = (char*)calloc(1, buf_size);
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int64_t read_bytes = 0;
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if (!buf)
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return false;
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if (pregap_bytes)
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filestream_seek(file, pregap_bytes, RETRO_VFS_SEEK_POSITION_START);
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read_bytes = filestream_read(file, buf, buf_size);
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if (read_bytes != buf_size)
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{
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#ifdef MEDIA_CUE_PARSE_DEBUG
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printf("[MEDIA] Could not read from media: got %" PRId64 " bytes instead of %d.\n", read_bytes, buf_size);
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fflush(stdout);
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#endif
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filestream_close(file);
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free(buf);
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return false;
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}
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/* 12-byte sync field at the start of every sector, common to both mode1 and mode2 data tracks
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* (when at least sync data is requested). This is a CD-ROM standard feature and not specific to any game devices,
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* and as such should not be part of any system-specific detection or "magic" bytes.
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* Depending on what parts of a sector were requested from the disc, the user data might start at
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* byte offset 0, 4, 8, 12, 16 or 24. Cue sheets only specify the total number of bytes requested from the sectors
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* of a track (like 2048 or 2352) and it is then assumed based on the size/mode as to what fields are present. */
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if (!memcmp(buf, "\x00\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x00", 12))
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{
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/* Assume track data contains all fields. */
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sector_size = 2352;
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/* Assume Mode 2 formed (formless is rarely used) */
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if (buf[15] == 2)
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offset = 24;
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else /* Assume Mode 1 */
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offset = 16;
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}
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else /* Assume sectors only contain user data instead. */
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sector_size = 2048;
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if (!memcmp(buf + offset, "SEGADISCSYSTEM",
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STRLEN_CONST("SEGADISCSYSTEM")))
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{
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const char *title_pos = NULL;
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const char *serial_pos = NULL;
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/* All discs currently in Redump for MCD start with SEGADISCSYSTEM. There are other strings mentioned elsewhere online,
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* but I have not seen any real examples of them. */
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info->system_id = MEDIA_CD_SYSTEM_MEGA_CD;
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strcpy_literal(info->system, "Sega CD / Mega CD");
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title_pos = buf + offset + 0x150;
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if (media_skip_spaces(&title_pos, 48))
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{
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memcpy(info->title, title_pos, 48 - (title_pos - (buf + offset + 0x150)));
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media_zero_trailing_spaces(info->title, sizeof(info->title));
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}
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else
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{
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info->title[0] = 'N';
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info->title[1] = '/';
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info->title[2] = 'A';
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info->title[3] = '\0';
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}
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serial_pos = buf + offset + 0x183;
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if (media_skip_spaces(&serial_pos, 8))
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{
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memcpy(info->serial, serial_pos, 8 - (serial_pos - (buf + offset + 0x183)));
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media_zero_trailing_spaces(info->serial, sizeof(info->serial));
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}
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else
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{
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info->serial[0] = 'N';
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info->serial[1] = '/';
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info->serial[2] = 'A';
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info->serial[3] = '\0';
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}
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}
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else if (!memcmp(buf + offset, "SEGA SEGASATURN",
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STRLEN_CONST("SEGA SEGASATURN")))
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{
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const char *title_pos = NULL;
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const char *serial_pos = NULL;
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const char *version_pos = NULL;
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const char *release_date_pos = NULL;
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info->system_id = MEDIA_CD_SYSTEM_SATURN;
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strcpy_literal(info->system, "Sega Saturn");
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title_pos = buf + offset + 0x60;
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if (media_skip_spaces(&title_pos, 112))
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{
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memcpy(info->title, title_pos, 112 - (title_pos - (buf + offset + 0x60)));
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media_zero_trailing_spaces(info->title, sizeof(info->title));
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}
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else
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{
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info->title [0] = 'N';
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info->title [1] = '/';
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info->title [2] = 'A';
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info->title [3] = '\0';
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}
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serial_pos = buf + offset + 0x20;
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if (media_skip_spaces(&serial_pos, 10))
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{
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memcpy(info->serial, serial_pos, 10 - (serial_pos - (buf + offset + 0x20)));
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media_zero_trailing_spaces(info->serial, sizeof(info->serial));
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}
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else
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{
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info->serial[0] = 'N';
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info->serial[1] = '/';
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info->serial[2] = 'A';
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info->serial[3] = '\0';
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}
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version_pos = buf + offset + 0x2a;
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if (media_skip_spaces(&version_pos, 6))
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{
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memcpy(info->version, version_pos, 6 - (version_pos - (buf + offset + 0x2a)));
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media_zero_trailing_spaces(info->version, sizeof(info->version));
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}
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else
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{
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info->version[0] = 'N';
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info->version[1] = '/';
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info->version[2] = 'A';
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info->version[3] = '\0';
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}
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release_date_pos = buf + offset + 0x30;
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if (media_skip_spaces(&release_date_pos, 8))
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{
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memcpy(info->release_date, release_date_pos, 8 - (release_date_pos - (buf + offset + 0x30)));
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media_zero_trailing_spaces(info->release_date, sizeof(info->release_date));
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}
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else
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{
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info->release_date[0] = 'N';
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info->release_date[1] = '/';
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info->release_date[2] = 'A';
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info->release_date[3] = '\0';
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}
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}
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else if (!memcmp(buf + offset, "SEGA SEGAKATANA", STRLEN_CONST("SEGA SEGAKATANA")))
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{
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const char *title_pos = NULL;
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const char *serial_pos = NULL;
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const char *version_pos = NULL;
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const char *release_date_pos = NULL;
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info->system_id = MEDIA_CD_SYSTEM_DREAMCAST;
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strcpy_literal(info->system, "Sega Dreamcast");
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title_pos = buf + offset + 0x80;
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if (media_skip_spaces(&title_pos, 96))
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{
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memcpy(info->title, title_pos, 96 - (title_pos - (buf + offset + 0x80)));
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media_zero_trailing_spaces(info->title, sizeof(info->title));
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}
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else
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{
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info->title [0] = 'N';
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info->title [1] = '/';
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info->title [2] = 'A';
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info->title [3] = '\0';
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}
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serial_pos = buf + offset + 0x40;
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if (media_skip_spaces(&serial_pos, 10))
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{
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memcpy(info->serial, serial_pos, 10 - (serial_pos - (buf + offset + 0x40)));
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media_zero_trailing_spaces(info->serial, sizeof(info->serial));
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}
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else
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{
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info->serial [0] = 'N';
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info->serial [1] = '/';
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info->serial [2] = 'A';
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info->serial [3] = '\0';
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}
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version_pos = buf + offset + 0x4a;
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if (media_skip_spaces(&version_pos, 6))
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{
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memcpy(info->version, version_pos, 6 - (version_pos - (buf + offset + 0x4a)));
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media_zero_trailing_spaces(info->version, sizeof(info->version));
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}
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else
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{
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info->version [0] = 'N';
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info->version [1] = '/';
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info->version [2] = 'A';
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info->version [3] = '\0';
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}
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release_date_pos = buf + offset + 0x50;
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if (media_skip_spaces(&release_date_pos, 8))
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{
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memcpy(info->release_date, release_date_pos, 8 - (release_date_pos - (buf + offset + 0x50)));
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media_zero_trailing_spaces(info->release_date, sizeof(info->release_date));
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}
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else
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{
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info->release_date[0] = 'N';
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info->release_date[1] = '/';
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info->release_date[2] = 'A';
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info->release_date[3] = '\0';
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}
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}
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/* Primary Volume Descriptor fields of ISO9660 */
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else if (!memcmp(buf + offset + (16 * sector_size), "\1CD001\1\0PLAYSTATION", 19))
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{
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const char *title_pos = NULL;
|
|
|
|
info->system_id = MEDIA_CD_SYSTEM_PSX;
|
|
|
|
strcpy_literal(info->system, "Sony PlayStation");
|
|
|
|
title_pos = buf + offset + (16 * sector_size) + 40;
|
|
|
|
if (media_skip_spaces(&title_pos, 32))
|
|
{
|
|
memcpy(info->title, title_pos, 32 - (title_pos - (buf + offset + (16 * sector_size) + 40)));
|
|
media_zero_trailing_spaces(info->title, sizeof(info->title));
|
|
}
|
|
else
|
|
{
|
|
info->title [0] = 'N';
|
|
info->title [1] = '/';
|
|
info->title [2] = 'A';
|
|
info->title [3] = '\0';
|
|
}
|
|
}
|
|
else if (!memcmp(buf + offset, "\x01\x5a\x5a\x5a\x5a\x5a\x01\x00\x00\x00\x00\x00", 12))
|
|
{
|
|
info->system_id = MEDIA_CD_SYSTEM_3DO;
|
|
strcpy_literal(info->system, "3DO");
|
|
}
|
|
else if (!memcmp(buf + offset + 0x950, "PC Engine CD-ROM SYSTEM", 23))
|
|
{
|
|
info->system_id = MEDIA_CD_SYSTEM_PC_ENGINE_CD;
|
|
strcpy_literal(info->system, "TurboGrafx-CD / PC-Engine CD");
|
|
}
|
|
|
|
free(buf);
|
|
}
|
|
|
|
filestream_close(file);
|
|
|
|
return true;
|
|
}
|