cdrom: set optimal read speed

libretro-common/cdrom/cdrom.c

@@ -438,6 +438,15 @@ static int cdrom_read_track_info(libretro_vfs_implementation_file *stream, unsig
    return 0;
 }
 
+int cdrom_set_read_speed(libretro_vfs_implementation_file *stream, unsigned speed)
+{
+   unsigned new_speed = swap_if_big32(speed);
+   /* MMC Command: SET CD SPEED */
+   unsigned char cmd[] = {0xBB, 0, (new_speed >> 24) & 0xFF, (new_speed >> 16) & 0xFF, (new_speed >> 8) & 0xFF, new_speed & 0xFF, 0, 0, 0, 0, 0, 0 };
+
+   return cdrom_send_command(stream, DIRECTION_NONE, NULL, 0, cmd, sizeof(cmd), 0);
+}
+
 int cdrom_write_cue(libretro_vfs_implementation_file *stream, char **out_buf, size_t *out_len, char cdrom_drive, unsigned char *num_tracks, cdrom_toc_t *toc)
 {
    unsigned char buf[2352] = {0};
@@ -456,6 +465,8 @@ int cdrom_write_cue(libretro_vfs_implementation_file *stream, char **out_buf, si
       return 1;
    }
 
+   cdrom_set_read_speed(stream, 0xFFFFFFFF);
+
    rv = cdrom_read_subq(stream, buf, sizeof(buf));
 
    if (rv)

libretro-common/include/cdrom/cdrom.h

@@ -76,6 +76,8 @@ int cdrom_get_inquiry(libretro_vfs_implementation_file *stream, char *model, int
 
 int cdrom_read(libretro_vfs_implementation_file *stream, unsigned char min, unsigned char sec, unsigned char frame, void *s, size_t len, size_t skip);
 
+int cdrom_set_read_speed(libretro_vfs_implementation_file *stream, unsigned speed);
+
 RETRO_END_DECLS
 
 #endif

libretro-common/include/streams/file_stream.h

@@ -36,6 +36,7 @@
 #include <boolean.h>
 
 #include <stdarg.h>
+#include <vfs/vfs_implementation.h>
 
 #define FILESTREAM_REQUIRED_VFS_VERSION 2
 
@@ -106,6 +107,8 @@ bool filestream_exists(const char *path);
 
 char *filestream_getline(RFILE *stream);
 
+const libretro_vfs_implementation_file* filestream_get_vfs_handle(RFILE *stream);
+
 RETRO_END_DECLS
 
 #endif

libretro-common/include/vfs/vfs_implementation_cdrom.h

@@ -27,6 +27,8 @@
 
 RETRO_BEGIN_DECLS
 
+typedef struct RFILE RFILE;
+
 typedef struct
 {
    char *cue_buf;
@@ -62,6 +64,8 @@ int retro_vfs_file_error_cdrom(libretro_vfs_implementation_file *stream);
 
 const cdrom_toc_t* retro_vfs_file_get_cdrom_toc(void);
 
+const vfs_cdrom_t* retro_vfs_file_get_cdrom_position(const libretro_vfs_implementation_file *stream);
+
 RETRO_END_DECLS
 
 #endif

libretro-common/streams/file_stream.c

@@ -609,3 +609,8 @@ char *filestream_getline(RFILE *stream)
    newline[idx]      = '\0';
    return newline;
 }
+
+const libretro_vfs_implementation_file* filestream_get_vfs_handle(RFILE *stream)
+{
+   return (const libretro_vfs_implementation_file*)stream->hfile;
+}

libretro-common/vfs/vfs_implementation_cdrom.c

@@ -440,3 +440,8 @@ int retro_vfs_file_error_cdrom(libretro_vfs_implementation_file *stream)
 {
    return 0;
 }
+
+const vfs_cdrom_t* retro_vfs_file_get_cdrom_position(const libretro_vfs_implementation_file *stream)
+{
+   return &stream->cdrom;
+}