physical cdrom readahead

[pcsx_rearmed.git] / frontend / libretro-cdrom.c

diff --git a/frontend/libretro-cdrom.c b/frontend/libretro-cdrom.c
new file mode 100644 (file)
index 0000000..654de1c
--- /dev/null
+++ b/frontend/libretro-cdrom.c
@@ -0,0 +1,70 @@
+#include "libretro-cdrom.h"
+#include "../deps/libretro-common/cdrom/cdrom.c"
+#if defined(__linux__) && !defined(ANDROID)
+//#include <linux/cdrom.h>
+#endif
+
+static int cdrom_send_command_dummy(const libretro_vfs_implementation_file *stream,
+      CDROM_CMD_Direction dir, void *buf, size_t len, unsigned char *cmd, size_t cmd_len,
+      unsigned char *sense, size_t sense_len)
+{
+   return 1;
+}
+
+static int cdrom_send_command_once(const libretro_vfs_implementation_file *stream,
+      CDROM_CMD_Direction dir, void *buf, size_t len, unsigned char *cmd, size_t cmd_len)
+{
+   unsigned char sense[CDROM_MAX_SENSE_BYTES] = {0};
+   int ret =
+#if defined(__linux__) && !defined(ANDROID)
+      cdrom_send_command_linux
+#elif defined(_WIN32) && !defined(_XBOX)
+      cdrom_send_command_win32
+#else
+      cdrom_send_command_dummy
+#endif
+         (stream, dir, buf, len, cmd, cmd_len, sense, sizeof(sense));
+#ifdef CDROM_DEBUG
+   if (ret && sense[2])
+      cdrom_print_sense_data(sense, sizeof(sense));
+#endif
+   (void)cdrom_send_command_dummy;
+   return ret;
+}
+
+// "extensions" to libretro-common
+int cdrom_set_read_speed_x(libretro_vfs_implementation_file *stream, unsigned speed)
+{
+   // SET CD-ROM SPEED, DA is newer?
+   unsigned char cmd1[] = {0xDA, 0, speed - 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+   unsigned char cmd2[] = {0xBB, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+   int ret;
+   ret = cdrom_send_command_once(stream, DIRECTION_NONE, NULL, 0, cmd1, sizeof(cmd1));
+   if (ret) {
+      printf("DA failed\n");
+#if defined(__linux__) && !defined(ANDROID)
+      // doesn't work, too late?
+      //ret = ioctl(fileno(stream->fp), CDROM_SELECT_SPEED, &speed);
+#endif
+   }
+   if (ret) {
+      speed = speed * 2352 * 75 / 1024;
+      cmd2[2] = speed >> 8;
+      cmd2[3] = speed;
+      ret = cdrom_send_command_once(stream, DIRECTION_NONE, NULL, 0, cmd2, sizeof(cmd2));
+   }
+   return ret;
+}
+
+int cdrom_read_sector(libretro_vfs_implementation_file *stream,
+      unsigned int lba, void *b)
+{
+   unsigned char cmd[] = {0xBE, 0, 0, 0, 0, 0, 0, 0, 1, 0xF8, 0, 0};
+   cmd[2] = lba >> 24;
+   cmd[3] = lba >> 16;
+   cmd[4] = lba >> 8;
+   cmd[5] = lba;
+   return cdrom_send_command_once(stream, DIRECTION_IN, b, 2352, cmd, sizeof(cmd));
+}
+
+// vim:sw=3:ts=3:expandtab