From cf36e3d15b31958927b81b9ec99793c3a99bafc2 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Fri, 13 Sep 2019 15:35:23 +0200
Subject: stream_dvdnav: merge stream_dvd_common

Isolate icky DVD garbage into a single file.
---
 stream/stream_dvdnav.c | 109 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 106 insertions(+), 3 deletions(-)

(limited to 'stream/stream_dvdnav.c')

diff --git a/stream/stream_dvdnav.c b/stream/stream_dvdnav.c
index 55ce771896..84d8c8b0f1 100644
--- a/stream/stream_dvdnav.c
+++ b/stream/stream_dvdnav.c
@@ -15,8 +15,6 @@
  * with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <libavutil/common.h>
-
 #include "config.h"
 
 #if !HAVE_GPL
@@ -31,7 +29,17 @@
 #include <errno.h>
 #include <assert.h>
 
+#ifdef __linux__
+#include <linux/cdrom.h>
+#include <scsi/sg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#endif
+
 #include <dvdnav/dvdnav.h>
+#include <libavutil/common.h>
+#include <libavutil/intreadwrite.h>
 
 #include "osdep/io.h"
 
@@ -44,7 +52,6 @@
 #include "stream.h"
 #include "demux/demux.h"
 #include "video/out/vo.h"
-#include "stream_dvd_common.h"
 
 #define TITLE_MENU -1
 #define TITLE_LONGEST -2
@@ -87,6 +94,102 @@ static const char *const mp_dvdnav_events[] = {
 #define LOOKUP_NAME(array, i) \
     (((i) >= 0 && (i) < MP_ARRAY_SIZE(array)) ? array[(i)] : "?")
 
+static void dvd_set_speed(stream_t *stream, char *device, unsigned speed)
+{
+#if defined(__linux__) && defined(SG_IO) && defined(GPCMD_SET_STREAMING)
+  int fd;
+  unsigned char buffer[28];
+  unsigned char cmd[12];
+  struct sg_io_hdr sghdr;
+  struct stat st;
+
+  memset(&st, 0, sizeof(st));
+
+  if (stat(device, &st) == -1) return;
+
+  if (!S_ISBLK(st.st_mode)) return; /* not a block device */
+
+  switch (speed) {
+  case 0: /* don't touch speed setting */
+    return;
+  case -1: /* restore default value */
+    MP_INFO(stream, "Restoring DVD speed... ");
+    break;
+  default: /* limit to <speed> KB/s */
+    // speed < 100 is multiple of DVD single speed (1350KB/s)
+    if (speed < 100)
+      speed *= 1350;
+    MP_INFO(stream, "Limiting DVD speed to %dKB/s... ", speed);
+    break;
+  }
+
+  memset(&sghdr, 0, sizeof(sghdr));
+  sghdr.interface_id = 'S';
+  sghdr.timeout = 5000;
+  sghdr.dxfer_direction = SG_DXFER_TO_DEV;
+  sghdr.dxfer_len = sizeof(buffer);
+  sghdr.dxferp = buffer;
+  sghdr.cmd_len = sizeof(cmd);
+  sghdr.cmdp = cmd;
+
+  memset(cmd, 0, sizeof(cmd));
+  cmd[0] = GPCMD_SET_STREAMING;
+  cmd[10] = sizeof(buffer);
+
+  memset(buffer, 0, sizeof(buffer));
+  /* first sector 0, last sector 0xffffffff */
+  AV_WB32(buffer + 8, 0xffffffff);
+  if (speed == -1)
+    buffer[0] = 4; /* restore default */
+  else {
+    /* <speed> kilobyte */
+    AV_WB32(buffer + 12, speed);
+    AV_WB32(buffer + 20, speed);
+  }
+  /* 1 second */
+  AV_WB16(buffer + 18, 1000);
+  AV_WB16(buffer + 26, 1000);
+
+  fd = open(device, O_RDWR | O_NONBLOCK | O_CLOEXEC);
+  if (fd == -1) {
+    MP_INFO(stream, "Couldn't open DVD device for writing, changing DVD speed needs write access.\n");
+    return;
+  }
+
+  if (ioctl(fd, SG_IO, &sghdr) < 0)
+    MP_INFO(stream, "failed\n");
+  else
+    MP_INFO(stream, "successful\n");
+
+  close(fd);
+#endif
+}
+
+// Check if this is likely to be an .ifo or similar file.
+static int dvd_probe(const char *path, const char *ext, const char *sig)
+{
+    if (!bstr_case_endswith(bstr0(path), bstr0(ext)))
+        return false;
+
+    FILE *temp = fopen(path, "rb");
+    if (!temp)
+        return false;
+
+    bool r = false;
+
+    char data[50];
+
+    assert(strlen(sig) <= sizeof(data));
+
+    if (fread(data, 50, 1, temp) == 1) {
+        if (memcmp(data, sig, strlen(sig)) == 0)
+            r = true;
+    }
+
+    fclose(temp);
+    return r;
+}
+
 /**
  * \brief mp_dvdnav_lang_from_aid() returns the language corresponding to audio id 'aid'
  * \param stream: - stream pointer
-- 
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